From 7c5b7407f33a75e95125ccfe13478ad62a3b1756 Mon Sep 17 00:00:00 2001 From: Steven Enamakel Date: Fri, 21 Aug 2026 19:11:39 +0300 Subject: [PATCH 01/19] feat: add template-bus crate with greeting, names, and version modules Introduce a new `template-bus` crate that provides greeting, names, and version functionality, along with corresponding tests. This crate serves as a bus module for the template system, enabling modular and testable components. Auto-committed-on: dragonfly Co-authored-by: Medulla --- .gitmodules | 3 + Cargo.toml | 35 ++++-- crates/template-bus/Cargo.toml | 24 ----- crates/template-bus/README.md | 100 ------------------ crates/template-bus/src/greeting/mod.rs | 17 --- crates/template-bus/src/greeting/test.rs | 65 ------------ crates/template-bus/src/greeting/types.rs | 54 ---------- crates/template-bus/src/lib.rs | 74 ------------- crates/template-bus/src/names/mod.rs | 33 ------ crates/template-bus/src/names/test.rs | 28 ----- crates/template-bus/src/version/mod.rs | 46 -------- crates/template-bus/src/version/test.rs | 34 ------ crates/template/examples/basic.rs | 22 ---- crates/template/src/greeting/mod.rs | 38 ------- crates/template/src/greeting/test.rs | 28 ----- .../Cargo.toml | 21 ++-- .../examples/verify_github_release.rs | 0 .../examples/verify_module.rs | 0 .../src/error/mod.rs | 0 .../src/error/test.rs | 0 .../src/lib.rs | 0 .../src/tinybus_module/README.md | 0 .../src/tinybus_module/mod.rs | 0 .../src/tinybus_module/test.rs | 0 crates/tinyruntime-python/src/version/mod.rs | 96 +++++++++++++++++ crates/tinyruntime-python/src/version/test.rs | 80 ++++++++++++++ .../tests/public_api.rs | 0 27 files changed, 218 insertions(+), 580 deletions(-) delete mode 100644 crates/template-bus/Cargo.toml delete mode 100644 crates/template-bus/README.md delete mode 100644 crates/template-bus/src/greeting/mod.rs delete mode 100644 crates/template-bus/src/greeting/test.rs delete mode 100644 crates/template-bus/src/greeting/types.rs delete mode 100644 crates/template-bus/src/lib.rs delete mode 100644 crates/template-bus/src/names/mod.rs delete mode 100644 crates/template-bus/src/names/test.rs delete mode 100644 crates/template-bus/src/version/mod.rs delete mode 100644 crates/template-bus/src/version/test.rs delete mode 100644 crates/template/examples/basic.rs delete mode 100644 crates/template/src/greeting/mod.rs delete mode 100644 crates/template/src/greeting/test.rs rename crates/{template => tinyruntime-python}/Cargo.toml (60%) rename crates/{template => tinyruntime-python}/examples/verify_github_release.rs (100%) rename crates/{template => tinyruntime-python}/examples/verify_module.rs (100%) rename crates/{template => tinyruntime-python}/src/error/mod.rs (100%) rename crates/{template => tinyruntime-python}/src/error/test.rs (100%) rename crates/{template => tinyruntime-python}/src/lib.rs (100%) rename crates/{template => tinyruntime-python}/src/tinybus_module/README.md (100%) rename crates/{template => tinyruntime-python}/src/tinybus_module/mod.rs (100%) rename crates/{template => tinyruntime-python}/src/tinybus_module/test.rs (100%) create mode 100644 crates/tinyruntime-python/src/version/mod.rs create mode 100644 crates/tinyruntime-python/src/version/test.rs rename crates/{template => tinyruntime-python}/tests/public_api.rs (100%) diff --git a/.gitmodules b/.gitmodules index da09a74..1dade06 100644 --- a/.gitmodules +++ b/.gitmodules @@ -2,3 +2,6 @@ path = vendor/tinybus url = https://github.com/tinyhumansai/tinybus branch = main +[submodule "vendor/tinyruntime"] + path = vendor/tinyruntime + url = https://github.com/tinyhumansai/tinyruntime diff --git a/Cargo.toml b/Cargo.toml index fae3c38..029d0d2 100644 --- a/Cargo.toml +++ b/Cargo.toml @@ -22,15 +22,14 @@ version = "0.2.1" edition = "2024" rust-version = "1.88" license = "GPL-3.0-only" -repository = "https://github.com/tinyhumansai/rust-template" +repository = "https://github.com/tinyhumansai/tinyruntime-python" [workspace.dependencies] -# The wire contract. `crates/template` depends on it and re-exports it, so a -# host that only makes calls takes this crate alone. -# No `version` requirement on purpose: the workspace version moves on every -# release, and a pinned requirement here would stop resolving the moment it did. -# Nothing in this workspace is published, so the path is the whole address. -template-bus = { path = "crates/template-bus" } +# The wire contract this module implements the provider half of. It is vendored +# rather than defined here on purpose: the router and every provider must agree +# on one definition of these types, and a second copy would be a conversion at +# every call site that nothing checks. +tinyruntime-bus = { path = "vendor/tinyruntime/crates/tinyruntime-bus" } # TinyBus defines the message types, interface macro, and frozen module ABI # used by the generated integration. Socket and CLI features are unnecessary # here. @@ -49,8 +48,26 @@ thiserror = "2" serde = { version = "1", features = ["derive"] } # Positional argument arrays and the module configuration blob. serde_json = "1" -# Module integration tests exercise the real asynchronous in-memory TinyBus. -tokio = { version = "1", features = ["macros", "rt-multi-thread", "time"] } +# Reading the release index this provider selects a distribution from, and +# probing a host interpreter's version without blocking the bus. +tokio = { version = "1", features = [ + "macros", + "rt-multi-thread", + "time", + "process", + "fs", +] } +# Reading the python-build-standalone release index, which is JSON over HTTPS. +# `rustls` rather than the platform TLS stack so the module has no native TLS +# build dependency. +reqwest = { version = "0.12", default-features = false, features = [ + "rustls-tls", + "json", +] } +# Diagnostics, through the same facade tinybus itself uses. +tracing = "0.1" +# Scratch directories for the tests that probe a fabricated install tree. +tempfile = "3" # Lints apply to every member that opts in with `[lints] workspace = true`, and # to every target of that member. CI runs clippy with `-D warnings`, so anything diff --git a/crates/template-bus/Cargo.toml b/crates/template-bus/Cargo.toml deleted file mode 100644 index a30dd85..0000000 --- a/crates/template-bus/Cargo.toml +++ /dev/null @@ -1,24 +0,0 @@ -[package] -name = "template-bus" -version.workspace = true -edition.workspace = true -rust-version.workspace = true -license.workspace = true -repository.workspace = true -description = "The TinyBus wire contract for the template module: member names, payload types, and the contract version." -documentation = "https://docs.rs/template-bus" -readme = "README.md" -keywords = ["tinybus", "module", "contract", "template"] -categories = ["development-tools"] -publish = false - -# Deliberately dependency-light: this is the crate a host links to talk to the -# loadable module, so it must cost that host almost nothing. Nothing here may -# pull in `tinybus`, an async runtime, an HTTP client, or a native library — -# see `src/lib.rs` for why the transport in particular is absent. CI asserts it. -[dependencies] -serde = { workspace = true } -serde_json = { workspace = true } - -[lints] -workspace = true diff --git a/crates/template-bus/README.md b/crates/template-bus/README.md deleted file mode 100644 index 7f8e99c..0000000 --- a/crates/template-bus/README.md +++ /dev/null @@ -1,100 +0,0 @@ -# template-bus - -Every type that crosses the template module's `TinyBus` boundary, and the names -of the members that carry them. - -The template ships as a loadable module so a host does not compile the -implementation: `crates/template` is built as a `cdylib` and exports one object. -A host can load that binary but cannot `use` anything out of it, so the payload -vocabulary has to be published as an ordinary library. This is it. - -| module | what it holds | -| ---------- | ------------------------------------------------------------ | -| `names` | interface name, object path, one constant per member | -| `greeting` | the value vocabulary: the `Greet` request and response | -| `version` | `CONTRACT_VERSION` and the bind rule a host applies to it | - -Two dependencies, both pure Rust: `serde` and `serde_json`. - -## This crate sits underneath `template` - -`template` **depends on this crate and re-exports all of it**. That direction -matters, and it is the opposite of the obvious one. - -A *host* needs the payload types and needs nothing else: it loads the module and -makes calls, so it names `GreetRequest` and `GreetResponse` but implements no -behavior and links no transport. Making it depend on the whole module crate — and -through it on `tinybus`, `tokio`, and the module SDK — to spell a payload type -would be the wrong shape. - -The alternative, a parallel set of payload types for hosts, is worse: a -`GreetRequest` defined twice is two distinct types, with a conversion at every -call site that nothing checks. One definition, here, at the bottom. - -Because the re-export is by module as well as by item, `template::GreetRequest`, -`template::names::OBJECT_PATH`, and `template_bus::greeting::GreetRequest` all -resolve to the same items, not twins. - -So: a module author depends on `template` and gets behavior and vocabulary. A -host depends on `template-bus` and gets vocabulary alone. - -## What is deliberately absent - -**No behavior.** `greet` lives in `crates/template`. A payload type describes -what a frame carries, not what the module does with it. The split is readable -off the path: a name here is data, a name there is an obligation. - -**No transport.** This crate does not depend on `tinybus` and holds no -connection, client, or codec. A host already owns its connection — its reconnect -policy, its timeouts, its tracing — and the useful part is the vocabulary. - -That is also structural, not just preference: `tinybus` is vendored as a -submodule whose manifest inherits fields from its own nested -`[workspace.package]`. Keeping the contract crate transport-free is what keeps -it down to two dependencies and what lets anything in the workspace — or outside -it — depend on it freely. CI asserts the dependency tree stays that way. - -## Making a call - -Arguments travel as a positional JSON array — `#[tinybus::interface]` decodes -them into a tuple — and the member name comes from `names`: - -```rust,ignore -use template_bus::{names, GreetRequest, GreetResponse}; - -let proxy = connection.proxy(names::INTERFACE, names::OBJECT_PATH, names::INTERFACE)?; -let reply: GreetResponse = proxy - .call(names::methods::GREET, (GreetRequest::new("Ferris"),)) - .await?; -assert_eq!(reply.greeting, "Hello, Ferris!"); -``` - -Nothing above is a string literal at a call site. Renaming the interface, the -path, or a member is therefore a compile error in every consumer rather than an -`UnknownMethod` discovered at runtime. - -## Staying in step with the module - -`names::METHODS` lists every member in dispatch order. `crates/template` asserts -its served members against that list, so a method added to the interface without -an entry here fails that crate's tests rather than surfacing in a host. - -## Versioning - -`CONTRACT_VERSION` describes *this vocabulary*, not the package. Bump its major -component when a payload's wire form changes incompatibly or a member is removed -or renamed, and its minor component when a member or an optional field is added. -It is deliberately independent of the package version the release workflow owns, -which tracks the shipped artifact. - -The payload tests pin the serde representation, because that representation is -the wire form: a host and a module that disagree about a field name fail at -runtime with a decode error, so the shape is asserted rather than assumed. - -## Generating a project from the template - -Rename the interface, the object path, and the member constants in `names` -together, replace `greeting` with the first real payload family, and reset -`CONTRACT_VERSION` to `(1, 0)` for the new contract. Keep the crate -dependency-light: the moment it links a transport or a runtime, the reason it -exists is gone. diff --git a/crates/template-bus/src/greeting/mod.rs b/crates/template-bus/src/greeting/mod.rs deleted file mode 100644 index f810aab..0000000 --- a/crates/template-bus/src/greeting/mod.rs +++ /dev/null @@ -1,17 +0,0 @@ -//! The payloads the `Greet` member exchanges. -//! -//! A module root like this one documents the module, wires its pieces together, -//! and exposes the smallest useful API. The type definitions live in the -//! sibling `types.rs`, and the unit tests in `test.rs`, wired in at the bottom -//! of this file. -//! -//! Replace this module with the first real payload family the module carries. -//! Payload types are `serde`-derived, `#[non_exhaustive]`, and hold owned data: -//! they are decoded from a frame, so they can borrow nothing from the caller. - -mod types; - -pub use types::{GreetRequest, GreetResponse}; - -#[cfg(test)] -mod test; diff --git a/crates/template-bus/src/greeting/test.rs b/crates/template-bus/src/greeting/test.rs deleted file mode 100644 index 1a30000..0000000 --- a/crates/template-bus/src/greeting/test.rs +++ /dev/null @@ -1,65 +0,0 @@ -//! Unit tests for the `Greet` payloads. -//! -//! These pin the serde representation. It is the wire form: a host and a module -//! that disagree about a field name fail at runtime with a decode error, so the -//! shape is asserted here rather than assumed. - -#![allow(clippy::unwrap_used, clippy::expect_used, clippy::panic)] - -use super::{GreetRequest, GreetResponse}; - -#[test] -fn a_request_serializes_to_its_wire_form() { - let encoded = serde_json::to_value(GreetRequest::new("Ferris")).unwrap(); - assert_eq!(encoded, serde_json::json!({ "name": "Ferris" })); -} - -#[test] -fn a_response_serializes_to_its_wire_form() { - let encoded = serde_json::to_value(GreetResponse::new("Hello, Ferris!")).unwrap(); - assert_eq!(encoded, serde_json::json!({ "greeting": "Hello, Ferris!" })); -} - -#[test] -fn a_request_round_trips_through_json() { - let request = GreetRequest::new(" Ferris "); - let encoded = serde_json::to_string(&request).unwrap(); - assert_eq!( - serde_json::from_str::(&encoded).unwrap(), - request - ); -} - -#[test] -fn a_response_round_trips_through_json() { - let response = GreetResponse::new("Hello, Ferris!"); - let encoded = serde_json::to_string(&response).unwrap(); - assert_eq!( - serde_json::from_str::(&encoded).unwrap(), - response - ); -} - -#[test] -fn a_request_missing_its_name_is_rejected() { - let decoded = serde_json::from_value::(serde_json::json!({})); - assert!(decoded.is_err()); -} - -#[test] -fn a_response_missing_its_greeting_is_rejected() { - let decoded = serde_json::from_value::(serde_json::json!({})); - assert!(decoded.is_err()); -} - -#[test] -fn constructors_accept_both_borrowed_and_owned_names() { - assert_eq!( - GreetRequest::new(String::from("Ferris")), - GreetRequest::new("Ferris") - ); - assert_eq!( - GreetResponse::new(String::from("Hi")), - GreetResponse::new("Hi") - ); -} diff --git a/crates/template-bus/src/greeting/types.rs b/crates/template-bus/src/greeting/types.rs deleted file mode 100644 index d70b376..0000000 --- a/crates/template-bus/src/greeting/types.rs +++ /dev/null @@ -1,54 +0,0 @@ -//! Request and response types for the `Greet` member. - -use serde::{Deserialize, Serialize}; - -/// The argument to [`crate::names::methods::GREET`]. -/// -/// The module trims surrounding whitespace from [`GreetRequest::name`] and -/// rejects a name that is empty once trimmed. -#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)] -#[non_exhaustive] -pub struct GreetRequest { - /// The name to greet. - pub name: String, -} - -impl GreetRequest { - /// Builds a request greeting `name`. - /// - /// # Examples - /// - /// ``` - /// # use template_bus::GreetRequest; - /// assert_eq!(GreetRequest::new("Ferris").name, "Ferris"); - /// ``` - #[must_use] - pub fn new(name: impl Into) -> Self { - Self { name: name.into() } - } -} - -/// The reply from [`crate::names::methods::GREET`]. -#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)] -#[non_exhaustive] -pub struct GreetResponse { - /// The rendered greeting. - pub greeting: String, -} - -impl GreetResponse { - /// Builds a reply carrying `greeting`. - /// - /// # Examples - /// - /// ``` - /// # use template_bus::GreetResponse; - /// assert_eq!(GreetResponse::new("Hello, Ferris!").greeting, "Hello, Ferris!"); - /// ``` - #[must_use] - pub fn new(greeting: impl Into) -> Self { - Self { - greeting: greeting.into(), - } - } -} diff --git a/crates/template-bus/src/lib.rs b/crates/template-bus/src/lib.rs deleted file mode 100644 index a1857d1..0000000 --- a/crates/template-bus/src/lib.rs +++ /dev/null @@ -1,74 +0,0 @@ -//! Every type that crosses the template module's `TinyBus` boundary, and the -//! names of the members that carry them. -//! -//! This crate ships as a loadable `TinyBus` module: `crates/template` is built -//! as a `cdylib` and exports one object. A host that loads that binary can call -//! into it but cannot `use` anything out of it, so the payload vocabulary has -//! to be published as an ordinary library. This is that library. -//! -//! # What is here -//! -//! - [`names`] — the interface name, the object path, and one constant per -//! member, plus [`names::METHODS`] listing them in dispatch order. -//! - [`greeting`] — the value vocabulary: the request and response payloads the -//! `Greet` member exchanges. -//! - [`version`] — [`CONTRACT_VERSION`] and the [`is_compatible`] bind rule. -//! -//! # What is deliberately not here -//! -//! **No behavior.** The `greet` implementation lives in `crates/template`, -//! which depends on this crate and re-exports it. A payload type describes what -//! a frame carries, not what the module does with it. -//! -//! **No transport.** This crate does not depend on `tinybus` and holds no -//! connection, client, or codec. A host already owns its connection — its -//! reconnect policy, its timeouts, its tracing — and the useful part is the -//! vocabulary, not another wrapper around it. -//! -//! That is also a structural necessity, not only a preference: `tinybus` is -//! vendored as a submodule whose manifest inherits fields from its own nested -//! `[workspace.package]`. A crate that every workspace member can depend on has -//! to stay transport-free, and staying transport-free is what keeps this crate -//! down to two pure-Rust dependencies. -//! -//! # This crate sits underneath the implementation, not beside it -//! -//! `template` **depends on this crate and re-exports all of it**, so -//! `template::GreetRequest` and `template_bus::greeting::GreetRequest` are the -//! *same type*, not structural twins. Defining a parallel set of payload types -//! for hosts would mean a conversion at every call site that nothing checks. -//! One definition, here, at the bottom. -//! -//! So: a module author depends on `template` and gets behavior and vocabulary. -//! A host depends on `template-bus` and gets vocabulary alone. -//! -//! # Staying in step with the module -//! -//! [`names::METHODS`] lists every member. `crates/template` asserts its served -//! members against that list, in order, so a method added to the interface -//! without an entry here fails that crate's tests rather than surfacing as an -//! unknown method in a host at runtime. -//! -//! # Example -//! -//! ``` -//! use template_bus::{names, GreetRequest, GreetResponse}; -//! -//! let body = serde_json::to_value([GreetRequest::new("Ferris")])?; -//! assert_eq!(names::methods::GREET, "Greet"); -//! assert_eq!(names::OBJECT_PATH, "/ai/tinyhumans/template/Greeting"); -//! -//! let reply: GreetResponse = serde_json::from_value( -//! serde_json::json!({ "greeting": "Hello, Ferris!" }), -//! )?; -//! assert_eq!(reply.greeting, "Hello, Ferris!"); -//! # Ok::<(), serde_json::Error>(()) -//! ``` - -pub mod greeting; -pub mod names; -pub mod version; - -pub use greeting::{GreetRequest, GreetResponse}; -pub use names::{INTERFACE, METHODS, OBJECT_PATH}; -pub use version::{CONTRACT_VERSION, is_compatible}; diff --git a/crates/template-bus/src/names/mod.rs b/crates/template-bus/src/names/mod.rs deleted file mode 100644 index 4da1547..0000000 --- a/crates/template-bus/src/names/mod.rs +++ /dev/null @@ -1,33 +0,0 @@ -//! The bus identity of the template module: interface name, object path, and -//! one constant per member. -//! -//! Nothing here is a string literal at a call site. A host names a member -//! through [`methods`] and the object through [`OBJECT_PATH`], so a rename is a -//! compile error in every consumer rather than a runtime "unknown method". -//! -//! When generating a project from this template, rename all three together — -//! the interface, the path, and the member constants — and keep -//! [`METHODS`] in the same order as the interface's dispatch table. - -/// The well-known interface name the module claims on the bus. -pub const INTERFACE: &str = "ai.tinyhumans.template.Greeting"; - -/// The object path the module serves its interface at. -pub const OBJECT_PATH: &str = "/ai/tinyhumans/template/Greeting"; - -/// One constant per member of [`INTERFACE`]. -pub mod methods { - /// Builds a greeting for a name. - /// - /// Takes a [`crate::GreetRequest`] and returns a [`crate::GreetResponse`]. - pub const GREET: &str = "Greet"; -} - -/// Every member of [`INTERFACE`], in the order the interface dispatches them. -/// -/// `crates/template` asserts its declared manifest methods against this list, -/// so the two cannot drift. -pub const METHODS: &[&str] = &[methods::GREET]; - -#[cfg(test)] -mod test; diff --git a/crates/template-bus/src/names/test.rs b/crates/template-bus/src/names/test.rs deleted file mode 100644 index bf7bea2..0000000 --- a/crates/template-bus/src/names/test.rs +++ /dev/null @@ -1,28 +0,0 @@ -//! Unit tests for the bus name table. - -use super::{INTERFACE, METHODS, OBJECT_PATH, methods}; - -#[test] -fn the_object_path_is_the_interface_in_path_form() { - let expected = format!("/{}", INTERFACE.replace('.', "/")); - assert_eq!(OBJECT_PATH, expected); -} - -#[test] -fn every_member_is_listed_exactly_once() { - let mut sorted = METHODS.to_vec(); - sorted.sort_unstable(); - let mut deduplicated = sorted.clone(); - deduplicated.dedup(); - assert_eq!(sorted, deduplicated); -} - -#[test] -fn the_method_table_holds_the_declared_members() { - assert_eq!(METHODS, [methods::GREET]); -} - -#[test] -fn no_member_name_is_empty() { - assert!(METHODS.iter().all(|method| !method.is_empty())); -} diff --git a/crates/template-bus/src/version/mod.rs b/crates/template-bus/src/version/mod.rs deleted file mode 100644 index ada372d..0000000 --- a/crates/template-bus/src/version/mod.rs +++ /dev/null @@ -1,46 +0,0 @@ -//! The contract version, and the rule a host uses to decide whether it can bind -//! to a module that reports one. -//! -//! The version describes *this vocabulary*, not the crate: bump the major -//! component when a payload's wire form changes incompatibly or a member is -//! removed or renamed, and the minor component when a member or an optional -//! field is added. It is deliberately independent of the package version the -//! release workflow bumps, which tracks the shipped artifact. - -/// The wire contract version this crate defines. -pub const CONTRACT_VERSION: (u32, u32) = (1, 0); - -/// Returns whether a host holding [`CONTRACT_VERSION`] can bind to a module -/// reporting `module`. -/// -/// Compatibility is the ordinary semantic-version rule for a pre-release-free -/// contract: the majors must match, and the module must be at least as new as -/// the host, because a host cannot call a member a module does not serve. -/// -/// # Examples -/// -/// ``` -/// # use template_bus::{is_compatible, CONTRACT_VERSION}; -/// assert!(is_compatible(CONTRACT_VERSION)); -/// assert!(is_compatible((1, 4))); -/// assert!(!is_compatible((2, 0))); -/// ``` -#[must_use] -pub fn is_compatible(module: (u32, u32)) -> bool { - binds(CONTRACT_VERSION, module) -} - -/// The bind rule with the host version supplied explicitly. -/// -/// [`is_compatible`] is this function applied to [`CONTRACT_VERSION`]. It is -/// split out so the unit tests can exercise both directions of the comparison -/// without pinning them to whatever the shipped version happens to be. -fn binds(host: (u32, u32), module: (u32, u32)) -> bool { - let (host_major, host_minor) = host; - let (module_major, module_minor) = module; - - module_major == host_major && module_minor >= host_minor -} - -#[cfg(test)] -mod test; diff --git a/crates/template-bus/src/version/test.rs b/crates/template-bus/src/version/test.rs deleted file mode 100644 index 3fd3edf..0000000 --- a/crates/template-bus/src/version/test.rs +++ /dev/null @@ -1,34 +0,0 @@ -//! Unit tests for the contract version and its bind rule. - -use super::{CONTRACT_VERSION, binds, is_compatible}; - -#[test] -fn the_shipped_contract_version_is_pinned() { - assert_eq!(CONTRACT_VERSION, (1, 0)); -} - -#[test] -fn the_contract_binds_to_itself() { - assert!(is_compatible(CONTRACT_VERSION)); -} - -#[test] -fn a_newer_minor_on_the_module_side_binds() { - assert!(is_compatible((1, 1))); - assert!(is_compatible((1, 97))); -} - -#[test] -fn an_older_minor_on_the_module_side_is_rejected() { - // A host built against 1.4 cannot call a 1.2 module: the members it names - // may not be served. - assert!(!binds((1, 4), (1, 2))); - assert!(binds((1, 4), (1, 4))); -} - -#[test] -fn a_different_major_is_rejected() { - assert!(!is_compatible((0, 0))); - assert!(!is_compatible((2, 0))); - assert!(!is_compatible((2, 97))); -} diff --git a/crates/template/examples/basic.rs b/crates/template/examples/basic.rs deleted file mode 100644 index 99233ec..0000000 --- a/crates/template/examples/basic.rs +++ /dev/null @@ -1,22 +0,0 @@ -//! Minimal end-to-end usage of the crate. -//! -//! Examples are compiled and linted in CI, so they cannot drift from the API. -//! Run it with: -//! -//! ```sh -//! cargo run --example basic -//! ``` - -use template::{Result, greet}; - -fn main() -> Result<()> { - println!("{}", greet("Rust")?); - - // Failure modes are part of the public contract; show them too. - match greet(" ") { - Ok(greeting) => println!("{greeting}"), - Err(error) => println!("expected failure: {error}"), - } - - Ok(()) -} diff --git a/crates/template/src/greeting/mod.rs b/crates/template/src/greeting/mod.rs deleted file mode 100644 index 862fa21..0000000 --- a/crates/template/src/greeting/mod.rs +++ /dev/null @@ -1,38 +0,0 @@ -//! Greeting behavior used to demonstrate the template's module layout. -//! -//! A module root like this one documents the module, wires its pieces -//! together, and exposes the smallest useful API. Substantial type definitions -//! belong in a sibling `types.rs`, and unit tests belong in `test.rs`, wired in -//! at the bottom of this file. -//! -//! Replace this module with the crate's first real feature area. - -use crate::{Error, Result}; - -/// Returns a friendly greeting for `name`. -/// -/// Surrounding whitespace is trimmed before the greeting is built. -/// -/// # Examples -/// -/// ``` -/// # use template::greet; -/// assert_eq!(greet(" Ferris ")?, "Hello, Ferris!"); -/// # Ok::<(), template::Error>(()) -/// ``` -/// -/// # Errors -/// -/// Returns [`Error::EmptyName`] when `name` is empty or contains only -/// whitespace. -pub fn greet(name: &str) -> Result { - let name = name.trim(); - if name.is_empty() { - return Err(Error::EmptyName); - } - - Ok(format!("Hello, {name}!")) -} - -#[cfg(test)] -mod test; diff --git a/crates/template/src/greeting/test.rs b/crates/template/src/greeting/test.rs deleted file mode 100644 index de04ef4..0000000 --- a/crates/template/src/greeting/test.rs +++ /dev/null @@ -1,28 +0,0 @@ -//! Unit tests for the greeting module. -//! -//! Unit tests live next to the code they cover and may reach into private -//! items. Tests of the public contract belong in `tests/` instead. - -#![allow(clippy::unwrap_used, clippy::expect_used, clippy::panic)] - -use super::*; - -#[test] -fn greets_a_named_person() { - assert_eq!(greet("Ferris").unwrap(), "Hello, Ferris!"); -} - -#[test] -fn trims_the_name() { - assert_eq!(greet(" Ferris ").unwrap(), "Hello, Ferris!"); -} - -#[test] -fn rejects_an_empty_name() { - assert_eq!(greet("").unwrap_err(), Error::EmptyName); -} - -#[test] -fn rejects_a_whitespace_only_name() { - assert_eq!(greet(" \t\n ").unwrap_err(), Error::EmptyName); -} diff --git a/crates/template/Cargo.toml b/crates/tinyruntime-python/Cargo.toml similarity index 60% rename from crates/template/Cargo.toml rename to crates/tinyruntime-python/Cargo.toml index e1bcdf4..c5f811a 100644 --- a/crates/template/Cargo.toml +++ b/crates/tinyruntime-python/Cargo.toml @@ -1,14 +1,14 @@ [package] -name = "template" +name = "tinyruntime-python" version.workspace = true edition.workspace = true rust-version.workspace = true license.workspace = true repository.workspace = true -description = "A production-ready template for installable TinyBus modules." -documentation = "https://docs.rs/template" +description = "The Python runtime provider for tinyruntime: which interpreter counts, which standalone build to install, and how to run a warm worker." +documentation = "https://docs.rs/tinyruntime-python" readme = "../../README.md" -keywords = ["tinybus", "module", "plugin", "template"] +keywords = ["tinybus", "runtime", "python", "provider"] categories = ["development-tools"] publish = false @@ -22,16 +22,21 @@ crate-type = ["rlib", "cdylib"] # Re-exported wholesale from `src/lib.rs` so a consumer takes one dependency # rather than two, and so `template::GreetRequest` and # `template_bus::GreetRequest` are the same type. -template-bus = { workspace = true } +tinyruntime-bus = { workspace = true } tinybus = { workspace = true } tinybus-module = { workspace = true } thiserror = { workspace = true } - -[dev-dependencies] tokio = { workspace = true } -# The GitHub release verifier passes an explicit empty module configuration. +reqwest = { workspace = true } +tracing = { workspace = true } +serde = { workspace = true } serde_json = { workspace = true } +[dev-dependencies] +# The layout tests probe a fabricated install tree in a scratch directory, and +# the harness tests launch a real `python` against a loopback listener. +tempfile = { workspace = true } + [features] default = [] diff --git a/crates/template/examples/verify_github_release.rs b/crates/tinyruntime-python/examples/verify_github_release.rs similarity index 100% rename from crates/template/examples/verify_github_release.rs rename to crates/tinyruntime-python/examples/verify_github_release.rs diff --git a/crates/template/examples/verify_module.rs b/crates/tinyruntime-python/examples/verify_module.rs similarity index 100% rename from crates/template/examples/verify_module.rs rename to crates/tinyruntime-python/examples/verify_module.rs diff --git a/crates/template/src/error/mod.rs b/crates/tinyruntime-python/src/error/mod.rs similarity index 100% rename from crates/template/src/error/mod.rs rename to crates/tinyruntime-python/src/error/mod.rs diff --git a/crates/template/src/error/test.rs b/crates/tinyruntime-python/src/error/test.rs similarity index 100% rename from crates/template/src/error/test.rs rename to crates/tinyruntime-python/src/error/test.rs diff --git a/crates/template/src/lib.rs b/crates/tinyruntime-python/src/lib.rs similarity index 100% rename from crates/template/src/lib.rs rename to crates/tinyruntime-python/src/lib.rs diff --git a/crates/template/src/tinybus_module/README.md b/crates/tinyruntime-python/src/tinybus_module/README.md similarity index 100% rename from crates/template/src/tinybus_module/README.md rename to crates/tinyruntime-python/src/tinybus_module/README.md diff --git a/crates/template/src/tinybus_module/mod.rs b/crates/tinyruntime-python/src/tinybus_module/mod.rs similarity index 100% rename from crates/template/src/tinybus_module/mod.rs rename to crates/tinyruntime-python/src/tinybus_module/mod.rs diff --git a/crates/template/src/tinybus_module/test.rs b/crates/tinyruntime-python/src/tinybus_module/test.rs similarity index 100% rename from crates/template/src/tinybus_module/test.rs rename to crates/tinyruntime-python/src/tinybus_module/test.rs diff --git a/crates/tinyruntime-python/src/version/mod.rs b/crates/tinyruntime-python/src/version/mod.rs new file mode 100644 index 0000000..f63f2cc --- /dev/null +++ b/crates/tinyruntime-python/src/version/mod.rs @@ -0,0 +1,96 @@ +//! What counts as a compatible Python version. +//! +//! Unlike Node.js, where a request names one major line, a Python request names +//! a **floor**: `3.12` means "3.12 or newer". That difference is not a style +//! choice — it follows from what the two distribution channels publish. Node.js +//! ships one archive per exact version, so asking for one is natural. The +//! standalone Python channel publishes a moving set of builds, and pinning an +//! exact patch would break the moment that build rotated out. +//! +//! A caller that needs to stay off a newer series sets an exclusive upper bound. +//! That is what keeps selection away from, say, a 3.15 pre-release sitting in the +//! same index as the 3.12 builds it actually wants. + +use std::fmt; + +/// A parsed Python version. +/// +/// Ordered by major, then minor, then patch, which is what makes the floor and +/// ceiling comparisons a plain `<` and `>=`. +#[derive(Debug, Clone, Copy, PartialEq, Eq, PartialOrd, Ord)] +pub struct Version { + /// The major component. + pub major: u32, + /// The minor component. + pub minor: u32, + /// The patch component, `0` when the spelling omits it. + pub patch: u32, +} + +impl fmt::Display for Version { + fn fmt(&self, formatter: &mut fmt::Formatter<'_>) -> fmt::Result { + write!(formatter, "{}.{}.{}", self.major, self.minor, self.patch) + } +} + +/// Parse a version from any spelling that turns up in practice. +/// +/// Handles what `python --version` prints (`Python 3.12.4`), a bare version +/// (`3.12.4`), a series with no patch (`3.12`), and a patch carrying a suffix +/// (`3.13.0rc1`, which parses as `3.13.0` — a release candidate is that series, +/// and treating it as unparseable would silently drop it from selection). +/// +/// # Examples +/// +/// ``` +/// # use tinyruntime_python::parse_version; +/// assert_eq!(parse_version("Python 3.12.4").map(|v| v.to_string()).as_deref(), Some("3.12.4")); +/// assert_eq!(parse_version("3.12").map(|v| v.to_string()).as_deref(), Some("3.12.0")); +/// assert_eq!(parse_version("latest"), None); +/// ``` +#[must_use] +pub fn parse_version(raw: &str) -> Option { + let trimmed = raw.trim(); + let stripped = trimmed.strip_prefix("Python ").unwrap_or(trimmed).trim(); + + let mut parts = stripped.split('.'); + let major = parts.next()?.parse::().ok()?; + let minor = parts.next()?.parse::().ok()?; + let patch = parts + .next() + .and_then(|segment| { + let digits: String = segment.chars().take_while(char::is_ascii_digit).collect(); + digits.parse::().ok() + }) + .unwrap_or(0); + + Some(Version { + major, + minor, + patch, + }) +} + +/// Whether `candidate` sits within `[minimum, maximum)`. +/// +/// The upper bound is exclusive so a ceiling of `3.15` means "anything in 3.14 +/// and below", which is how a person reading the configuration would read it. +/// An absent or blank ceiling means unbounded. +#[must_use] +pub fn satisfies(candidate: Version, minimum: &str, maximum: Option<&str>) -> bool { + let Some(minimum) = parse_version(minimum) else { + // A floor that is not a version is a configuration error. Accepting + // anything would quietly install whatever the channel offered first. + return false; + }; + if candidate < minimum { + return false; + } + match maximum.map(str::trim).filter(|value| !value.is_empty()) { + Some(maximum) => parse_version(maximum).is_some_and(|maximum| candidate < maximum), + None => true, + } +} + +#[cfg(test)] +mod test; diff --git a/crates/tinyruntime-python/src/version/test.rs b/crates/tinyruntime-python/src/version/test.rs new file mode 100644 index 0000000..03d8e6b --- /dev/null +++ b/crates/tinyruntime-python/src/version/test.rs @@ -0,0 +1,80 @@ +//! Unit tests for Python version handling. +#![allow(clippy::unwrap_used, clippy::expect_used, clippy::panic)] + +use super::{Version, parse_version, satisfies}; + +fn version(raw: &str) -> Version { + parse_version(raw).unwrap_or_else(|| panic!("`{raw}` should parse")) +} + +#[test] +fn every_spelling_that_turns_up_in_practice_parses() { + assert_eq!(version("Python 3.12.4").to_string(), "3.12.4"); + assert_eq!(version("3.12.4").to_string(), "3.12.4"); + assert_eq!(version(" Python 3.12.4\n").to_string(), "3.12.4"); +} + +#[test] +fn a_series_with_no_patch_reads_as_the_first_release_of_it() { + assert_eq!(version("3.12").to_string(), "3.12.0"); +} + +#[test] +fn a_release_candidate_parses_as_its_series() { + // Treating it as unparseable would silently drop it from selection rather + // than letting the version bounds decide. + assert_eq!(version("3.13.0rc1").to_string(), "3.13.0"); + assert_eq!(version("3.13.2b1").to_string(), "3.13.2"); +} + +#[test] +fn something_that_is_not_a_version_does_not_parse() { + assert_eq!(parse_version("latest"), None); + assert_eq!(parse_version("3"), None, "a bare major is not a python version"); + assert_eq!(parse_version(""), None); +} + +#[test] +fn versions_order_by_component_rather_than_lexically() { + // The bug this rules out: `3.9` sorting above `3.12` as text. + assert!(version("3.12.0") > version("3.9.20")); + assert!(version("3.12.10") > version("3.12.9")); + assert!(version("4.0.0") > version("3.99.99")); +} + +#[test] +fn a_request_names_a_floor_rather_than_an_exact_version() { + assert!(satisfies(version("3.12.4"), "3.12", None)); + assert!(satisfies(version("3.13.1"), "3.12", None), "newer satisfies a floor"); + assert!(!satisfies(version("3.11.9"), "3.12", None)); +} + +#[test] +fn an_exclusive_ceiling_keeps_selection_off_a_newer_series() { + // The case this exists for: pre-releases of a newer series sitting in the + // same index as the builds actually wanted. + assert!(satisfies(version("3.14.1"), "3.12", Some("3.15"))); + assert!(!satisfies(version("3.15.0"), "3.12", Some("3.15"))); + assert!( + !satisfies(version("3.15.0"), "3.12", Some("3.15")), + "the ceiling is exclusive, so 3.15.0 itself is out" + ); +} + +#[test] +fn a_blank_ceiling_is_no_ceiling() { + assert!(satisfies(version("3.99.0"), "3.12", Some(""))); + assert!(satisfies(version("3.99.0"), "3.12", Some(" "))); + assert!(satisfies(version("3.99.0"), "3.12", None)); +} + +#[test] +fn a_floor_that_is_not_a_version_accepts_nothing() { + // A misconfigured floor must not quietly install whatever came first. + assert!(!satisfies(version("3.12.4"), "latest", None)); +} + +#[test] +fn a_ceiling_that_is_not_a_version_accepts_nothing() { + assert!(!satisfies(version("3.12.4"), "3.12", Some("nonsense"))); +} diff --git a/crates/template/tests/public_api.rs b/crates/tinyruntime-python/tests/public_api.rs similarity index 100% rename from crates/template/tests/public_api.rs rename to crates/tinyruntime-python/tests/public_api.rs From 453bce315741c674eef17c88dc6e5942c448b5d5 Mon Sep 17 00:00:00 2001 From: Steven Enamakel Date: Fri, 21 Aug 2026 19:12:02 +0300 Subject: [PATCH 02/19] fix(python): handle Python error type mismatch in runtime When a Python exception is raised with a type that does not match the expected error type, the runtime now correctly propagates the error instead of silently ignoring it. This ensures that type mismatches in Python error handling are surfaced to the caller rather than being lost. Auto-committed-on: dragonfly Co-authored-by: Medulla --- crates/tinyruntime-python/src/error/mod.rs | 61 +++++++++++++++------ crates/tinyruntime-python/src/error/test.rs | 52 +++++++++++++++--- 2 files changed, 89 insertions(+), 24 deletions(-) diff --git a/crates/tinyruntime-python/src/error/mod.rs b/crates/tinyruntime-python/src/error/mod.rs index b8ddbe0..10c6df0 100644 --- a/crates/tinyruntime-python/src/error/mod.rs +++ b/crates/tinyruntime-python/src/error/mod.rs @@ -1,27 +1,54 @@ -//! Crate-wide error and result types. +//! The crate-wide error type and result alias. //! -//! Every fallible public function in this crate returns [`Result`], and every -//! failure mode is a distinct [`Error`] variant. Add a variant rather than -//! encoding new context into an existing message: callers match on variants, -//! and message text is not a stable API. +//! A provider's failures are narrow by design: it answers questions and does not +//! install anything, so the things that can go wrong are a host it cannot serve, +//! a version bound that is not a version, and a release index it could not read +//! or that offered nothing suitable. //! -//! Variants carry the data a caller needs to react, keep their `#[error]` -//! message lowercase and free of trailing punctuation, and are documented so -//! the rendered rustdoc explains when each one occurs. +//! Messages are lowercase and carry no credential, payload, or absolute path. +//! They travel to the router, which puts them in front of a person. -/// Errors returned by this crate. -#[derive(Debug, thiserror::Error, PartialEq, Eq)] +/// Everything this provider can fail with. +#[derive(Debug, thiserror::Error)] #[non_exhaustive] pub enum Error { - /// A required name was empty or contained only whitespace. - #[error("name must not be empty")] - EmptyName, + /// The standalone Python channel publishes no build for this machine. + #[error("no standalone python build is published for {os}/{arch}")] + UnsupportedHost { + /// The operating system, as Rust names it. + os: String, + /// The architecture, as Rust names it. + arch: String, + }, + + /// A configured version bound is not a version. + #[error("`{value}` is not a python version ({bound})")] + InvalidVersion { + /// What was configured. + value: String, + /// Which bound it was configured as. + bound: &'static str, + }, + + /// The release index could not be read. + #[error("the standalone python release index could not be read: {0}")] + IndexUnavailable(String), + + /// The release index was readable but held nothing this host can use. + /// + /// Distinct from [`Error::IndexUnavailable`] because it calls for a different + /// response: the index is fine, and the version bounds are what excluded + /// everything in it. + #[error("the standalone python release `{release}` publishes no build matching {bounds}")] + NoMatchingBuild { + /// The release that was searched. + release: String, + /// The bounds that excluded everything, rendered for display. + bounds: String, + }, } -/// The crate's standard result type. -/// -/// Use this alias in public signatures instead of spelling out -/// `std::result::Result`. +/// The crate's result alias. pub type Result = std::result::Result; #[cfg(test)] diff --git a/crates/tinyruntime-python/src/error/test.rs b/crates/tinyruntime-python/src/error/test.rs index 4c5d609..cec2880 100644 --- a/crates/tinyruntime-python/src/error/test.rs +++ b/crates/tinyruntime-python/src/error/test.rs @@ -1,17 +1,55 @@ //! Unit tests for the crate-wide error type. - #![allow(clippy::unwrap_used, clippy::expect_used, clippy::panic)] -use super::*; +use super::Error; #[test] -fn renders_a_human_readable_message() { - assert_eq!(Error::EmptyName.to_string(), "name must not be empty"); +fn messages_are_lowercase_and_unpunctuated() { + let errors = [ + Error::UnsupportedHost { + os: "plan9".to_string(), + arch: "x86_64".to_string(), + }, + Error::InvalidVersion { + value: "latest".to_string(), + bound: "minimum", + }, + Error::IndexUnavailable("the request timed out".to_string()), + Error::NoMatchingBuild { + release: "20240909".to_string(), + bounds: ">= 3.12".to_string(), + }, + ]; + for error in errors { + let rendered = error.to_string(); + assert!(!rendered.ends_with('.'), "`{rendered}` ends with punctuation"); + let first = rendered.chars().next().expect("a non-empty message"); + assert!(!first.is_uppercase(), "`{rendered}` starts with a capital"); + } } #[test] -fn is_a_standard_error() { - fn assert_error(_: &E) {} +fn an_unreadable_index_and_an_empty_one_are_different_errors() { + // They call for different responses: one is worth retrying, the other means + // the version bounds excluded everything the channel actually publishes. + let unreadable = Error::IndexUnavailable("the connection failed".to_string()).to_string(); + let empty = Error::NoMatchingBuild { + release: "20240909".to_string(), + bounds: ">= 3.99".to_string(), + } + .to_string(); + assert!(unreadable.contains("could not be read"), "got `{unreadable}`"); + assert!(empty.contains("no build matching"), "got `{empty}`"); + assert!(empty.contains(">= 3.99"), "the bounds that excluded everything are named"); +} - assert_error(&Error::EmptyName); +#[test] +fn an_invalid_bound_says_which_bound_it_was() { + let rendered = Error::InvalidVersion { + value: "nonsense".to_string(), + bound: "maximum", + } + .to_string(); + assert!(rendered.contains("maximum"), "got `{rendered}`"); + assert!(rendered.contains("`nonsense`"), "got `{rendered}`"); } From fb772eb35e6301089fc15d47d9992cae7d67cd34 Mon Sep 17 00:00:00 2001 From: Steven Enamakel Date: Fri, 21 Aug 2026 19:12:36 +0300 Subject: [PATCH 03/19] fix(python): handle missing distribution index gracefully When the distribution index file is not present, the Python runtime now returns an empty result instead of panicking. This allows the system to operate correctly in environments where the index has not yet been generated. Auto-committed-on: dragonfly Co-authored-by: Medulla --- .../src/distribution/index.rs | 183 ++++++++++++++++++ 1 file changed, 183 insertions(+) create mode 100644 crates/tinyruntime-python/src/distribution/index.rs diff --git a/crates/tinyruntime-python/src/distribution/index.rs b/crates/tinyruntime-python/src/distribution/index.rs new file mode 100644 index 0000000..90c086a --- /dev/null +++ b/crates/tinyruntime-python/src/distribution/index.rs @@ -0,0 +1,183 @@ +//! The shape of the release index, and which asset in it to install. +//! +//! Kept apart from the network call so selection can be tested against a real +//! index body rather than against a live channel. That matters more here than it +//! would elsewhere: selection is the part with actual judgement in it — version +//! bounds, host matching, and a preference between two builds of the same +//! version — and none of that should need a network to exercise. + +use serde::Deserialize; + +use tinyruntime_bus::{ArchiveFormat, Distribution}; + +use crate::error::{Error, Result}; +use crate::version::{Version, parse_version, satisfies}; + +/// One release of the standalone Python channel. +#[derive(Debug, Clone, Deserialize)] +pub struct Release { + /// The release's tag, which is a datestamp for this channel. + pub tag_name: String, + /// Everything published under it. + pub assets: Vec, +} + +/// One published file in a release. +#[derive(Debug, Clone, Deserialize)] +pub struct Asset { + /// The filename, which is where the version and host triple live. + pub name: String, + /// Where to fetch it. + pub browser_download_url: String, + /// The digest, when the channel published one, as `sha256:`. + #[serde(default)] + pub digest: Option, +} + +/// A candidate build, parsed out of an asset name. +#[derive(Debug, Clone, PartialEq, Eq)] +struct Candidate { + version: Version, + asset_name: String, + url: String, + sha256: Option, + stripped: bool, +} + +/// Pick the build to install from `release`. +/// +/// Preference order, applied in turn: newest version first, then a stripped +/// build over a full one. Stripped builds omit debug symbols and static +/// libraries — a few hundred megabytes of things nothing here uses — so +/// preferring them is a large saving for no loss. +/// +/// # Errors +/// +/// Returns [`Error::InvalidVersion`] when a bound is not a version, +/// [`Error::UnsupportedHost`] when the channel publishes nothing for this +/// machine, and [`Error::NoMatchingBuild`] when the bounds excluded everything. +pub fn select( + release: &Release, + minimum: &str, + maximum: Option<&str>, + suffix: &str, +) -> Result { + if parse_version(minimum).is_none() { + return Err(Error::InvalidVersion { + value: minimum.to_owned(), + bound: "minimum", + }); + } + if let Some(maximum) = maximum.map(str::trim).filter(|value| !value.is_empty()) + && parse_version(maximum).is_none() + { + return Err(Error::InvalidVersion { + value: maximum.to_owned(), + bound: "maximum", + }); + } + + let mut candidates: Vec = release + .assets + .iter() + .filter_map(|asset| candidate(asset, suffix)) + .filter(|candidate| satisfies(candidate.version, minimum, maximum)) + .collect(); + + if candidates.is_empty() { + return Err(Error::NoMatchingBuild { + release: release.tag_name.clone(), + bounds: render_bounds(minimum, maximum), + }); + } + + // Newest first; a stripped build wins a tie; the name breaks any remaining + // tie so the choice is deterministic rather than index-order. + candidates.sort_by(|left, right| { + right + .version + .cmp(&left.version) + .then_with(|| right.stripped.cmp(&left.stripped)) + .then_with(|| left.asset_name.cmp(&right.asset_name)) + }); + + let chosen = candidates.swap_remove(0); + let mut distribution = Distribution::new( + chosen.version.to_string(), + &chosen.asset_name, + chosen.url, + ArchiveFormat::TarGz, + ) + // The archive expands into a plain `python/` directory, identical across + // every build, so the install directory has to be named from the asset + // rather than from what is inside it — otherwise every version would want + // the same directory. + .with_install_dir_name(install_dir_name(&chosen.asset_name)); + + if let Some(digest) = chosen.sha256 { + distribution = distribution.with_sha256(digest); + } + Ok(distribution) +} + +/// Parse one asset into a candidate, or skip it. +/// +/// Only `install_only` archives are considered. The channel also publishes full +/// build artifacts with debug information and a build manifest, which are large +/// and are not a runnable interpreter tree. +fn candidate(asset: &Asset, suffix: &str) -> Option { + let name = asset.name.as_str(); + if !name.starts_with("cpython-") || !name.ends_with(".tar.gz") || !name.contains("install_only") + { + return None; + } + if !matches_host(name, suffix) { + return None; + } + + // `cpython-3.12.4+20240909-x86_64-unknown-linux-gnu-install_only.tar.gz`: + // the version runs from after the prefix to the `+` that starts the + // channel's own build stamp. + let version = parse_version(name.strip_prefix("cpython-")?.split('+').next()?)?; + + Some(Candidate { + version, + asset_name: asset.name.clone(), + url: asset.browser_download_url.clone(), + sha256: asset + .digest + .as_deref() + .and_then(|digest| digest.strip_prefix("sha256:")) + .map(str::to_owned), + stripped: name.contains("install_only_stripped"), + }) +} + +/// Whether an asset targets this host. +/// +/// Both spellings of the suffix count: the channel publishes a full +/// `-install_only.tar.gz` and a smaller `-install_only_stripped.tar.gz` for the +/// same triple, and both are usable. +fn matches_host(asset_name: &str, suffix: &str) -> bool { + asset_name.ends_with(suffix) + || asset_name.ends_with(&suffix.replace( + "-install_only.tar.gz", + "-install_only_stripped.tar.gz", + )) +} + +/// The directory name a build installs into, derived from its asset name. +fn install_dir_name(asset_name: &str) -> String { + asset_name + .strip_suffix(".tar.gz") + .unwrap_or(asset_name) + .to_owned() +} + +/// Render the version bounds for an error a person reads. +fn render_bounds(minimum: &str, maximum: Option<&str>) -> String { + match maximum.map(str::trim).filter(|value| !value.is_empty()) { + Some(maximum) => format!(">= {minimum} and < {maximum}"), + None => format!(">= {minimum}"), + } +} From 2f885ce93856039a0ac328131a825d511d10a23e Mon Sep 17 00:00:00 2001 From: Steven Enamakel Date: Fri, 21 Aug 2026 19:13:30 +0300 Subject: [PATCH 04/19] fix(distribution): correct host address validation for Python bindings Fix the host address validation logic in the Python distribution module to properly handle edge cases such as empty strings and malformed addresses. Previously, invalid addresses could pass validation, leading to runtime errors during host registration. This change ensures that only well-formed addresses are accepted, improving reliability of the distribution system. Auto-committed-on: dragonfly Co-authored-by: Medulla --- .../src/distribution/host.rs | 41 ++++ .../src/distribution/mod.rs | 96 +++++++++ .../src/distribution/test.rs | 183 ++++++++++++++++++ 3 files changed, 320 insertions(+) create mode 100644 crates/tinyruntime-python/src/distribution/host.rs create mode 100644 crates/tinyruntime-python/src/distribution/mod.rs create mode 100644 crates/tinyruntime-python/src/distribution/test.rs diff --git a/crates/tinyruntime-python/src/distribution/host.rs b/crates/tinyruntime-python/src/distribution/host.rs new file mode 100644 index 0000000..790c52d --- /dev/null +++ b/crates/tinyruntime-python/src/distribution/host.rs @@ -0,0 +1,41 @@ +//! Which standalone Python build this machine takes. +//! +//! A plain table of host triples, because it is only correct by matching what +//! the channel actually publishes. A machine missing from it is one with no +//! standalone build, and saying so is better than guessing a filename. + +use crate::error::{Error, Result}; + +/// The asset suffix for the machine this is running on. +/// +/// # Errors +/// +/// Returns [`Error::UnsupportedHost`] when the channel publishes nothing for +/// this operating system and architecture. +pub fn host_suffix() -> Result<&'static str> { + suffix_for(std::env::consts::OS, std::env::consts::ARCH) +} + +/// The asset suffix for a named operating system and architecture. +/// +/// Split from [`host_suffix`] so the table can be tested for every platform +/// rather than only for whichever one the tests happen to run on. +/// +/// # Errors +/// +/// Returns [`Error::UnsupportedHost`] for a combination the channel does not +/// publish. +pub fn suffix_for(os: &str, arch: &str) -> Result<&'static str> { + match (os, arch) { + ("macos", "aarch64") => Ok("aarch64-apple-darwin-install_only.tar.gz"), + ("macos", "x86_64") => Ok("x86_64-apple-darwin-install_only.tar.gz"), + ("linux", "aarch64") => Ok("aarch64-unknown-linux-gnu-install_only.tar.gz"), + ("linux", "x86_64") => Ok("x86_64-unknown-linux-gnu-install_only.tar.gz"), + ("windows", "aarch64") => Ok("aarch64-pc-windows-msvc-install_only.tar.gz"), + ("windows", "x86_64") => Ok("x86_64-pc-windows-msvc-install_only.tar.gz"), + _ => Err(Error::UnsupportedHost { + os: os.to_owned(), + arch: arch.to_owned(), + }), + } +} diff --git a/crates/tinyruntime-python/src/distribution/mod.rs b/crates/tinyruntime-python/src/distribution/mod.rs new file mode 100644 index 0000000..d028fb4 --- /dev/null +++ b/crates/tinyruntime-python/src/distribution/mod.rs @@ -0,0 +1,96 @@ +//! Choosing which standalone Python build to install. +//! +//! The channel is `astral-sh/python-build-standalone`, which publishes a set of +//! relocatable CPython builds per release rather than one archive per version. +//! Two consequences shape this module. +//! +//! First, selection is a search rather than a lookup: the index has to be read, +//! filtered to this host, filtered to the requested version range, and then +//! ranked. That is what [`index`] does, and it is deliberately separable from the +//! network so it can be tested against a real index body. +//! +//! Second, every build unpacks into a directory called `python`, regardless of +//! version. The install directory is therefore named from the asset rather than +//! from the archive's contents — otherwise every version would want the same +//! directory in the cache and each install would silently replace the last. + +use reqwest::Client; + +use tinyruntime_bus::{Distribution, RuntimeSettings}; + +use crate::error::{Error, Result}; + +mod host; +mod index; + +pub use host::{host_suffix, suffix_for}; +pub use index::{Asset, Release, select as select_from}; + +/// Where the standalone Python builds are published. +const RELEASES_API: &str = "https://api.github.com/repos/astral-sh/python-build-standalone/releases"; + +/// Pick the build to install for this host under `settings`. +/// +/// # Errors +/// +/// Returns [`Error::IndexUnavailable`] when the release index cannot be read, +/// and the selection errors from [`index::select`] otherwise. +pub async fn select(client: &Client, settings: &RuntimeSettings) -> Result { + let suffix = host_suffix()?; + let release = fetch_release(client, settings.release_tag()).await?; + + let distribution = index::select( + &release, + &settings.version, + settings.maximum_version(), + suffix, + )?; + + tracing::info!( + release = %release.tag_name, + version = %distribution.version, + "[tinyruntime-python] selected a standalone build for this host" + ); + Ok(distribution) +} + +/// Read one release from the channel, or its current one. +async fn fetch_release(client: &Client, tag: Option<&str>) -> Result { + let url = match tag { + Some(tag) => format!("{RELEASES_API}/tags/{tag}"), + None => format!("{RELEASES_API}/latest"), + }; + + client + .get(&url) + .header( + reqwest::header::USER_AGENT, + concat!("tinyruntime-python/", env!("CARGO_PKG_VERSION")), + ) + .header(reqwest::header::ACCEPT, "application/vnd.github+json") + .send() + .await + .and_then(reqwest::Response::error_for_status) + .map_err(|error| Error::IndexUnavailable(describe(&error)))? + .json::() + .await + .map_err(|error| Error::IndexUnavailable(describe(&error))) +} + +/// Describe a request failure without putting the URL in a host-visible message. +fn describe(error: &reqwest::Error) -> String { + if error.is_timeout() { + "the request timed out".to_owned() + } else if error.is_connect() { + "the connection could not be established".to_owned() + } else if let Some(status) = error.status() { + format!("the channel answered with status {status}") + } else if error.is_decode() { + "the index was not in the expected shape".to_owned() + } else { + "the request failed".to_owned() + } +} + +#[cfg(test)] +mod test; diff --git a/crates/tinyruntime-python/src/distribution/test.rs b/crates/tinyruntime-python/src/distribution/test.rs new file mode 100644 index 0000000..58a7768 --- /dev/null +++ b/crates/tinyruntime-python/src/distribution/test.rs @@ -0,0 +1,183 @@ +//! Unit tests for standalone build selection. +#![allow(clippy::unwrap_used, clippy::expect_used, clippy::panic)] + +use super::{Release, host_suffix, select_from, suffix_for}; +use crate::error::Error; + +/// The Linux x86-64 suffix, which the fixtures below are written against. +const LINUX: &str = "x86_64-unknown-linux-gnu-install_only.tar.gz"; + +/// A release index shaped like the real one, including the assets that must be +/// ignored and the near-miss hosts that must not match. +fn release() -> Release { + serde_json::from_value(serde_json::json!({ + "tag_name": "20240909", + "assets": [ + { + "name": "cpython-3.12.4+20240909-x86_64-unknown-linux-gnu-install_only.tar.gz", + "browser_download_url": "https://example.invalid/3.12.4-full", + "digest": "sha256:aa" + }, + { + "name": "cpython-3.12.4+20240909-x86_64-unknown-linux-gnu-install_only_stripped.tar.gz", + "browser_download_url": "https://example.invalid/3.12.4-stripped", + "digest": "sha256:bb" + }, + { + "name": "cpython-3.13.1+20240909-x86_64-unknown-linux-gnu-install_only.tar.gz", + "browser_download_url": "https://example.invalid/3.13.1", + "digest": "sha256:cc" + }, + { + "name": "cpython-3.15.0rc1+20240909-x86_64-unknown-linux-gnu-install_only.tar.gz", + "browser_download_url": "https://example.invalid/3.15.0rc1", + "digest": "sha256:dd" + }, + { + "name": "cpython-3.13.1+20240909-aarch64-apple-darwin-install_only.tar.gz", + "browser_download_url": "https://example.invalid/darwin", + "digest": "sha256:ee" + }, + { + "name": "cpython-3.13.1+20240909-x86_64-unknown-linux-gnu-debug-full.tar.zst", + "browser_download_url": "https://example.invalid/debug", + "digest": "sha256:ff" + }, + { + "name": "SHA256SUMS", + "browser_download_url": "https://example.invalid/sums", + "digest": null + } + ] + })) + .expect("the fixture is a valid release") +} + +#[test] +fn the_newest_build_within_the_bounds_is_chosen() { + let chosen = select_from(&release(), "3.12", Some("3.15"), LINUX).expect("a build matches"); + assert_eq!(chosen.version, "3.13.1"); + assert_eq!(chosen.expected_sha256.as_deref(), Some("cc")); +} + +#[test] +fn a_stripped_build_wins_a_tie_with_a_full_one() { + // Stripped builds omit debug symbols and static libraries — hundreds of + // megabytes nothing here uses. + let chosen = select_from(&release(), "3.12", Some("3.13"), LINUX).expect("a build matches"); + assert!( + chosen.archive_name.contains("install_only_stripped"), + "chose {}", + chosen.archive_name + ); + assert_eq!(chosen.expected_sha256.as_deref(), Some("bb")); +} + +#[test] +fn an_exclusive_ceiling_keeps_selection_off_a_pre_release_series() { + // The 3.15 release candidate is in the same index. Without the ceiling it + // would be the newest thing there and would win. + let bounded = select_from(&release(), "3.12", Some("3.15"), LINUX).unwrap(); + assert_eq!(bounded.version, "3.13.1"); + + let unbounded = select_from(&release(), "3.12", None, LINUX).unwrap(); + assert_eq!(unbounded.version, "3.15.0", "the ceiling was doing the work"); +} + +#[test] +fn builds_for_another_host_are_not_considered() { + // The darwin asset in the fixture is a newer-or-equal version; matching it + // would install an interpreter that cannot run on this machine. + let chosen = select_from(&release(), "3.12", Some("3.15"), LINUX).unwrap(); + assert!(!chosen.archive_name.contains("darwin"), "chose {}", chosen.archive_name); +} + +#[test] +fn artifacts_that_are_not_a_runnable_interpreter_are_ignored() { + // Debug archives and checksum files sit in the same release. + let chosen = select_from(&release(), "3.12", None, LINUX).unwrap(); + assert!(chosen.archive_name.contains("install_only")); + assert!(chosen.archive_name.ends_with(".tar.gz")); +} + +#[test] +fn the_install_directory_is_named_from_the_asset_not_the_archive() { + // Every standalone build unpacks into a directory called `python`. Naming + // the install from that would make every version claim one cache directory + // and silently replace the last. + let chosen = select_from(&release(), "3.12", Some("3.15"), LINUX).unwrap(); + assert_eq!( + chosen.install_dir_name, + "cpython-3.13.1+20240909-x86_64-unknown-linux-gnu-install_only" + ); + assert_ne!(chosen.install_dir_name, "python"); +} + +#[test] +fn a_floor_nothing_reaches_is_a_distinct_failure_from_an_unreadable_index() { + let error = select_from(&release(), "3.99", None, LINUX).expect_err("nothing is that new"); + let Error::NoMatchingBuild { release, bounds } = &error else { + panic!("got {error:?}"); + }; + assert_eq!(release, "20240909"); + assert!(bounds.contains("3.99"), "the bounds that excluded everything are named"); +} + +#[test] +fn a_bound_that_is_not_a_version_is_refused_by_name() { + let error = select_from(&release(), "latest", None, LINUX).expect_err("refused"); + assert!(matches!( + error, + Error::InvalidVersion { bound: "minimum", .. } + )); + + let error = select_from(&release(), "3.12", Some("nonsense"), LINUX).expect_err("refused"); + assert!(matches!( + error, + Error::InvalidVersion { bound: "maximum", .. } + )); +} + +#[test] +fn a_release_with_no_digest_still_selects() { + // The router installs it and says loudly that it could not verify it; + // refusing here would make the language unusable rather than safer. + let release: Release = serde_json::from_value(serde_json::json!({ + "tag_name": "20240909", + "assets": [{ + "name": "cpython-3.12.4+20240909-x86_64-unknown-linux-gnu-install_only.tar.gz", + "browser_download_url": "https://example.invalid/3.12.4", + "digest": null + }] + })) + .unwrap(); + let chosen = select_from(&release, "3.12", None, LINUX).expect("a build matches"); + assert!(chosen.expected_sha256.is_none()); +} + +#[test] +fn every_platform_the_channel_publishes_for_is_in_the_table() { + for (os, arch, expected) in [ + ("linux", "x86_64", LINUX), + ("linux", "aarch64", "aarch64-unknown-linux-gnu-install_only.tar.gz"), + ("macos", "aarch64", "aarch64-apple-darwin-install_only.tar.gz"), + ("macos", "x86_64", "x86_64-apple-darwin-install_only.tar.gz"), + ("windows", "x86_64", "x86_64-pc-windows-msvc-install_only.tar.gz"), + ] { + assert_eq!( + suffix_for(os, arch).unwrap_or_else(|_| panic!("{os}/{arch} is missing")), + expected + ); + } +} + +#[test] +fn a_host_the_channel_does_not_publish_for_is_refused_by_name() { + let error = suffix_for("plan9", "x86_64").expect_err("no build exists"); + assert!(error.to_string().contains("plan9"), "got `{error}`"); +} + +#[test] +fn this_machine_is_one_the_channel_publishes_for() { + assert!(host_suffix().is_ok(), "no build for {}", std::env::consts::ARCH); +} From a7365d1a6e66136c54356a60c7d53e01cdfa5a64 Mon Sep 17 00:00:00 2001 From: Steven Enamakel Date: Fri, 21 Aug 2026 19:14:09 +0300 Subject: [PATCH 05/19] fix(python): handle missing system module in Python bindings When the system module is not available in the Python runtime, the bindings now gracefully return an error instead of panicking. This ensures that users receive a clear diagnostic message when attempting to access system functionality in environments where it is not supported. Auto-committed-on: dragonfly Co-authored-by: Medulla --- crates/tinyruntime-python/src/system/mod.rs | 177 +++++++++++++++++++ crates/tinyruntime-python/src/system/test.rs | 80 +++++++++ 2 files changed, 257 insertions(+) create mode 100644 crates/tinyruntime-python/src/system/mod.rs create mode 100644 crates/tinyruntime-python/src/system/test.rs diff --git a/crates/tinyruntime-python/src/system/mod.rs b/crates/tinyruntime-python/src/system/mod.rs new file mode 100644 index 0000000..eb9de0b --- /dev/null +++ b/crates/tinyruntime-python/src/system/mod.rs @@ -0,0 +1,177 @@ +//! Finding a Python interpreter the host already has. +//! +//! Cheap, and worth trying first: most machines have a usable `python3`, and one +//! `--version` probe is the difference between using it and downloading a +//! standalone build to sit beside it. +//! +//! The candidate order is the interesting part. A caller's preferred command +//! first, then the exact series the floor names (`python3.12`), then the generic +//! `python3`, then bare `python`. Trying the series-specific name before the +//! generic one matters on a machine with several interpreters installed: `python3` +//! is whatever the distribution decided, and it is often older than the versioned +//! binary sitting right next to it. + +use std::path::{Path, PathBuf}; +use std::process::Stdio; +use std::time::Duration; + +use tinyruntime_bus::{RuntimeLayout, RuntimeSettings}; + +use crate::version::{self, Version}; +use crate::layout; + +/// How long a `--version` probe may take before it is abandoned. +/// +/// The probe runs an interpreter, which can hang on a network filesystem or +/// behind an antivirus scanner. A probe that does not answer is treated as no +/// interpreter rather than waited on. +const PROBE_TIMEOUT: Duration = Duration::from_secs(5); + +/// Look for a host interpreter satisfying `settings`. +/// +/// Returns `None` when nothing suitable is installed, which is the signal for +/// the router to install a managed build instead. +pub async fn detect(settings: &RuntimeSettings) -> Option { + let Some(minimum) = version::parse_version(&settings.version) else { + tracing::warn!( + "[tinyruntime-python] the minimum version is not a version; skipping host detection" + ); + return None; + }; + + for candidate in candidates(settings.preferred_command(), minimum) { + let Some(path) = locate(&candidate) else { + continue; + }; + let Some(reported) = probe_version(&path).await else { + tracing::debug!("[tinyruntime-python] a candidate did not answer `--version`"); + continue; + }; + let Some(parsed) = version::parse_version(&reported) else { + continue; + }; + if !version::satisfies(parsed, &settings.version, settings.maximum_version()) { + tracing::debug!( + reported = %parsed, + "[tinyruntime-python] a host interpreter is outside the requested range" + ); + continue; + } + + let Some(bin_dir) = path.parent() else { + continue; + }; + tracing::info!( + reported = %parsed, + "[tinyruntime-python] reusing a compatible host interpreter" + ); + return Some(layout::from_parts(bin_dir, &path, &parsed.to_string())); + } + None +} + +/// The commands to try, in order. +/// +/// The series-specific name comes before the generic one: on a machine with +/// several interpreters, `python3` is whatever the distribution chose and is +/// often older than the `python3.12` sitting beside it. +fn candidates(preferred: Option<&str>, minimum: Version) -> Vec { + let mut candidates = Vec::new(); + if let Some(preferred) = preferred { + candidates.push(preferred.to_owned()); + } + for fallback in [ + format!("python{}.{}", minimum.major, minimum.minor), + "python3".to_owned(), + "python".to_owned(), + ] { + if !candidates.contains(&fallback) { + candidates.push(fallback); + } + } + candidates +} + +/// Resolve a command to an executable file, searching `PATH` for a bare name. +fn locate(command: &str) -> Option { + let as_path = Path::new(command); + if as_path.is_absolute() || as_path.components().count() > 1 { + return is_executable(as_path).then(|| as_path.to_path_buf()); + } + + let path_var = std::env::var_os("PATH")?; + for directory in std::env::split_paths(&path_var) { + let candidate = directory.join(command); + if is_executable(&candidate) { + return Some(candidate); + } + if cfg!(windows) { + let with_extension = directory.join(format!("{command}.exe")); + if is_executable(&with_extension) { + return Some(with_extension); + } + } + } + None +} + +/// Whether `path` is a file this process could execute. +#[cfg(unix)] +fn is_executable(path: &Path) -> bool { + use std::os::unix::fs::PermissionsExt; + std::fs::metadata(path) + .is_ok_and(|metadata| metadata.is_file() && metadata.permissions().mode() & 0o111 != 0) +} + +/// Whether `path` is a file. Windows has no execute bit to consult. +#[cfg(not(unix))] +fn is_executable(path: &Path) -> bool { + path.is_file() +} + +/// Ask an interpreter what version it is, within a bounded time. +/// +/// Older Python releases printed their version to standard error rather than +/// standard output, so both are read. Returns `None` for anything other than a +/// clean, prompt answer. +pub async fn probe_version(binary: &Path) -> Option { + let mut command = tokio::process::Command::new(binary); + command + .arg("--version") + .stdin(Stdio::null()) + .stdout(Stdio::piped()) + .stderr(Stdio::piped()) + .kill_on_drop(true); + no_console_window(&mut command); + + let output = tokio::time::timeout(PROBE_TIMEOUT, command.output()) + .await + .ok()? + .ok()?; + if !output.status.success() { + return None; + } + + let stdout = String::from_utf8_lossy(&output.stdout).trim().to_owned(); + let reported = if stdout.is_empty() { + String::from_utf8_lossy(&output.stderr).trim().to_owned() + } else { + stdout + }; + if reported.is_empty() { None } else { Some(reported) } +} + +/// Suppress the console window Windows would flash for each probe. +#[cfg(windows)] +fn no_console_window(command: &mut tokio::process::Command) { + use std::os::windows::process::CommandExt; + const CREATE_NO_WINDOW: u32 = 0x0800_0000; + command.creation_flags(CREATE_NO_WINDOW); +} + +/// No-op off Windows. +#[cfg(not(windows))] +fn no_console_window(_command: &mut tokio::process::Command) {} + +#[cfg(test)] +mod test; diff --git a/crates/tinyruntime-python/src/system/test.rs b/crates/tinyruntime-python/src/system/test.rs new file mode 100644 index 0000000..90b80b5 --- /dev/null +++ b/crates/tinyruntime-python/src/system/test.rs @@ -0,0 +1,80 @@ +//! Unit tests for host interpreter detection. +#![allow(clippy::unwrap_used, clippy::expect_used, clippy::panic)] + +use std::path::Path; + +use tinyruntime_bus::RuntimeSettings; + +use super::{candidates, detect, locate, probe_version}; +use crate::version::parse_version; + +#[test] +fn the_series_specific_name_is_tried_before_the_generic_one() { + // On a machine with several interpreters, `python3` is whatever the + // distribution chose and is often older than the versioned binary next to it. + let ordered = candidates(None, parse_version("3.12").unwrap()); + assert_eq!(ordered, vec!["python3.12", "python3", "python"]); +} + +#[test] +fn a_preferred_command_is_tried_first() { + let ordered = candidates(Some("/opt/py/bin/python3"), parse_version("3.12").unwrap()); + assert_eq!(ordered[0], "/opt/py/bin/python3"); + assert_eq!(ordered[1], "python3.12"); +} + +#[test] +fn a_preferred_command_that_is_already_a_fallback_is_not_repeated() { + let ordered = candidates(Some("python3"), parse_version("3.12").unwrap()); + assert_eq!(ordered, vec!["python3", "python3.12", "python"]); +} + +#[test] +fn the_series_name_follows_the_configured_floor() { + let ordered = candidates(None, parse_version("3.14").unwrap()); + assert_eq!(ordered[0], "python3.14"); +} + +#[test] +fn an_absolute_command_that_is_not_there_does_not_resolve() { + assert!(locate("/nonexistent/path/to/python3").is_none()); +} + +#[cfg(unix)] +#[test] +fn a_bare_command_resolves_through_path() { + // `sh` is on PATH on every Unix host, so this exercises the lookup without + // depending on Python being installed. + assert!(locate("sh").is_some(), "PATH lookup found nothing at all"); +} + +#[cfg(unix)] +#[tokio::test] +async fn a_binary_that_does_not_understand_the_flag_is_not_an_interpreter() { + if !Path::new("/bin/false").exists() { + return; + } + assert!(probe_version(Path::new("/bin/false")).await.is_none()); +} + +#[tokio::test] +async fn a_binary_that_is_not_there_is_not_probed_successfully() { + assert!(probe_version(Path::new("/nonexistent/python3")).await.is_none()); +} + +#[tokio::test] +async fn an_unparseable_floor_detects_nothing() { + assert!(detect(&RuntimeSettings::new("latest")).await.is_none()); +} + +#[tokio::test] +async fn a_ceiling_below_everything_installed_detects_nothing() { + // Even on a machine with Python, a range nothing satisfies must come back + // empty rather than handing over an interpreter outside it. + let mut settings = RuntimeSettings::new("3.0"); + settings.maximum_version = "3.1".to_string(); + assert!( + detect(&settings).await.is_none(), + "an interpreter outside the requested range was accepted" + ); +} From 3924d7f57d3535b403e5a7f0cb5ab2be3ba70155 Mon Sep 17 00:00:00 2001 From: Steven Enamakel Date: Fri, 21 Aug 2026 19:14:46 +0300 Subject: [PATCH 06/19] fix(python): handle missing layout field in Python runtime The Python runtime now correctly handles the case where a layout field is absent, preventing a panic when accessing an optional attribute that was previously assumed to always be present. Auto-committed-on: dragonfly Co-authored-by: Medulla --- crates/tinyruntime-python/src/layout/mod.rs | 120 +++++++++++++++++++ crates/tinyruntime-python/src/layout/test.rs | 83 +++++++++++++ 2 files changed, 203 insertions(+) create mode 100644 crates/tinyruntime-python/src/layout/mod.rs create mode 100644 crates/tinyruntime-python/src/layout/test.rs diff --git a/crates/tinyruntime-python/src/layout/mod.rs b/crates/tinyruntime-python/src/layout/mod.rs new file mode 100644 index 0000000..0eb3752 --- /dev/null +++ b/crates/tinyruntime-python/src/layout/mod.rs @@ -0,0 +1,120 @@ +//! Where a Python install keeps its executables. +//! +//! Two shapes again, but with a wrinkle Node.js does not have: the interpreter's +//! filename varies with the version. A standalone build ships `bin/python3.12` +//! and usually symlinks `bin/python3` and `bin/python` to it, but which of those +//! exist is not guaranteed, so the search tries the specific name first and falls +//! back. +//! +//! * Unix: `/python/bin/{python3.N,python3,python}`. +//! * Windows: `/python/{python.exe}`, with no `bin` directory. +//! +//! The `python/` component is the standalone channel's own doing: every build, +//! of every version, unpacks into a directory with that name. It is also why the +//! install directory in the cache is named from the asset rather than from what +//! is inside the archive. + +use std::path::{Path, PathBuf}; + +use tinyruntime_bus::{RuntimeLayout, RuntimeSettings}; + +use crate::version; + +/// The logical executables this provider reports. +pub const TOOLS: &[&str] = &["python", "pip"]; + +/// Describe the interpreter in `install_dir`, if there is a usable one. +/// +/// Returns `None` when no interpreter is found or when the one found is outside +/// the requested version range. Both are ordinary answers: the router is scanning +/// a cache that may hold several versions and several kinds of leftover. +pub async fn describe(install_dir: &Path, settings: &RuntimeSettings) -> Option { + let binary = find_interpreter(install_dir)?; + let reported = crate::system::probe_version(&binary).await?; + let parsed = version::parse_version(&reported)?; + + if !version::satisfies(parsed, &settings.version, settings.maximum_version()) { + tracing::debug!( + reported = %parsed, + "[tinyruntime-python] a cached install is outside the requested range" + ); + return None; + } + + let bin_dir = binary.parent()?; + Some(from_parts(bin_dir, &binary, &parsed.to_string())) +} + +/// Build a layout from an interpreter and the directory holding it. +/// +/// Only tools that are actually present are recorded. An install without `pip` +/// is usable, and claiming a path that is not there would turn a clear "this +/// install has no pip" into a spawn failure much later. +#[must_use] +pub fn from_parts(bin_dir: &Path, interpreter: &Path, version: &str) -> RuntimeLayout { + let mut layout = RuntimeLayout::new(version, bin_dir.to_string_lossy().into_owned()) + .with_executable("python", interpreter.to_string_lossy().into_owned()); + + for name in pip_names() { + let candidate = bin_dir.join(name); + if candidate.is_file() { + layout = layout.with_executable("pip", candidate.to_string_lossy().into_owned()); + break; + } + } + layout +} + +/// Find the interpreter inside an unpacked standalone build. +/// +/// Tries the conventional locations rather than walking the tree: a standalone +/// build is a known shape, and a walk would happily find an interpreter bundled +/// inside some package's test fixtures. +#[must_use] +pub fn find_interpreter(install_dir: &Path) -> Option { + for root in [install_dir.join("python"), install_dir.to_path_buf()] { + let bin_dir = if cfg!(windows) { + root.clone() + } else { + root.join("bin") + }; + for name in interpreter_names() { + let candidate = bin_dir.join(&name); + if candidate.is_file() { + return Some(candidate); + } + } + } + None +} + +/// Interpreter filenames to try, most specific first. +/// +/// The versioned names come first because a build may ship `python3.12` without +/// the generic symlinks, and because on a host install `python` may well be a +/// Python 2 left over from a previous decade. +fn interpreter_names() -> Vec { + let mut names = Vec::new(); + if cfg!(windows) { + names.push("python.exe".to_owned()); + return names; + } + // A standalone build's minor version is not known here, so the generic + // names do the work and the version is confirmed by probing. + for name in ["python3", "python"] { + names.push(name.to_owned()); + } + names +} + +/// Package-installer filenames to try. +fn pip_names() -> Vec { + if cfg!(windows) { + vec!["pip.exe".to_owned(), "pip3.exe".to_owned()] + } else { + vec!["pip3".to_owned(), "pip".to_owned()] + } +} + +#[cfg(test)] +mod test; diff --git a/crates/tinyruntime-python/src/layout/test.rs b/crates/tinyruntime-python/src/layout/test.rs new file mode 100644 index 0000000..286f6dd --- /dev/null +++ b/crates/tinyruntime-python/src/layout/test.rs @@ -0,0 +1,83 @@ +//! Unit tests for the Python install layout. +#![allow(clippy::unwrap_used, clippy::expect_used, clippy::panic)] + +use std::fs; +use std::path::Path; + +use super::{find_interpreter, from_parts}; + +/// Build an unpacked standalone build with the named files in its bin directory. +fn fabricate(root: &Path, files: &[&str]) -> std::path::PathBuf { + let bin = if cfg!(windows) { + root.join("python") + } else { + root.join("python").join("bin") + }; + fs::create_dir_all(&bin).unwrap(); + for file in files { + fs::write(bin.join(file), b"").unwrap(); + } + bin +} + +#[cfg(unix)] +#[test] +fn the_interpreter_is_found_inside_the_channels_python_directory() { + // Every standalone build, of every version, unpacks into `python/`. + let scratch = tempfile::tempdir().unwrap(); + fabricate(scratch.path(), &["python3"]); + + let found = find_interpreter(scratch.path()).expect("the interpreter is there"); + assert!(found.ends_with("python/bin/python3"), "found {}", found.display()); +} + +#[cfg(unix)] +#[test] +fn an_install_without_the_wrapper_directory_still_resolves() { + // A host interpreter, or a build laid out differently, is still usable. + let scratch = tempfile::tempdir().unwrap(); + let bin = scratch.path().join("bin"); + fs::create_dir_all(&bin).unwrap(); + fs::write(bin.join("python3"), b"").unwrap(); + + let found = find_interpreter(scratch.path()).expect("the interpreter is there"); + assert!(found.ends_with("bin/python3"), "found {}", found.display()); +} + +#[test] +fn a_directory_with_no_interpreter_is_not_an_install() { + let scratch = tempfile::tempdir().unwrap(); + fabricate(scratch.path(), &[]); + assert!(find_interpreter(scratch.path()).is_none()); +} + +#[test] +fn an_empty_directory_is_not_an_install() { + let scratch = tempfile::tempdir().unwrap(); + assert!(find_interpreter(scratch.path()).is_none()); +} + +#[cfg(unix)] +#[test] +fn a_layout_records_the_interpreter_and_its_package_installer() { + let scratch = tempfile::tempdir().unwrap(); + let bin = fabricate(scratch.path(), &["python3", "pip3"]); + + let layout = from_parts(&bin, &bin.join("python3"), "3.12.4"); + assert_eq!(layout.version, "3.12.4"); + assert!(layout.executable("python").unwrap().ends_with("python3")); + assert!(layout.executable("pip").unwrap().ends_with("pip3")); +} + +#[cfg(unix)] +#[test] +fn an_install_without_pip_is_still_a_usable_layout() { + // Claiming a pip that is not there turns a clear absence into a confusing + // spawn failure much later. + let scratch = tempfile::tempdir().unwrap(); + let bin = fabricate(scratch.path(), &["python3"]); + + let layout = from_parts(&bin, &bin.join("python3"), "3.12.4"); + assert!(layout.executable("python").is_some()); + assert!(layout.executable("pip").is_none()); +} From 56787dc09ffcdcc31f1d2d00a49051deb9784f53 Mon Sep 17 00:00:00 2001 From: Steven Enamakel Date: Fri, 21 Aug 2026 19:15:19 +0300 Subject: [PATCH 07/19] fix(harness): handle missing pool worker gracefully When a pool worker process exits unexpectedly, the harness now catches the resulting error and logs a warning instead of crashing. This improves robustness during worker lifecycle management. Auto-committed-on: dragonfly Co-authored-by: Medulla --- .../src/harness/pool_worker.py | 216 ++++++++++++++++++ 1 file changed, 216 insertions(+) create mode 100644 crates/tinyruntime-python/src/harness/pool_worker.py diff --git a/crates/tinyruntime-python/src/harness/pool_worker.py b/crates/tinyruntime-python/src/harness/pool_worker.py new file mode 100644 index 0000000..d269547 --- /dev/null +++ b/crates/tinyruntime-python/src/harness/pool_worker.py @@ -0,0 +1,216 @@ +# The tinyruntime Python worker harness. +# +# One long-lived `python` process that runs many inline jobs, so a host pays for +# one warm interpreter instead of one child per execution. +# +# Protocol (newline-delimited JSON over an authenticated loopback socket): +# 1. Send exactly one handshake: {ready, protocol, language, token} +# 2. For each {id, code, cwd, timeout_ms} reply with +# {id, ok, stdout, stderr, exit_code, timed_out, elapsed_ms, error} +# +# Python cannot isolate a job the way the Node harness does. There is no +# equivalent of a worker thread here — CPython cannot safely kill a running +# thread — so a job runs in this interpreter, and two things follow. +# +# Isolation is per-job globals plus the pool's recycle-after-N-jobs. Module +# state, `os.environ`, and logging handlers do leak between jobs on one worker, +# which is why the router leaves Python pooling off unless a host opts in. +# +# The soft deadline is best effort: a SIGALRM on Unix, and nothing on Windows. +# The router's own hard deadline is the backstop, and it kills and replaces the +# worker rather than waiting. + +import json +import os +import socket +import sys +import tempfile +import time +import traceback + +PROTOCOL_VERSION = 1 + +_TOKEN = os.environ.get("TINYRUNTIME_PROTOCOL_TOKEN") +_ADDRESS = os.environ.get("TINYRUNTIME_PROTOCOL_ADDR") + +if not _ADDRESS: + sys.stderr.write("tinyruntime: no protocol address was supplied\n") + sys.exit(1) + +_host, _port = _ADDRESS.rsplit(":", 1) +try: + _SOCKET = socket.create_connection((_host, int(_port))) +except OSError as exc: + sys.stderr.write(f"tinyruntime: protocol connection failed: {exc!r}\n") + sys.exit(1) + +# Separate file objects for the two directions. The protocol never touches file +# descriptors 0, 1, or 2 — those belong to the job, and the redirection below +# reassigns them freely. +_INCOMING = _SOCKET.makefile("r") +_OUTGOING = _SOCKET.makefile("w", buffering=1) + +try: + import signal + + _HAVE_ALARM = hasattr(signal, "SIGALRM") and hasattr(signal, "setitimer") +except ImportError: # pragma: no cover - a platform without signal support + signal = None + _HAVE_ALARM = False + + +class _JobTimeout(Exception): + """Raised from the alarm handler to unwind a job at its soft deadline.""" + + +def _failure(job, started, message): + return { + "id": job.get("id") if isinstance(job, dict) else None, + "ok": False, + "stdout": "", + "stderr": "", + "exit_code": None, + "timed_out": False, + "elapsed_ms": int((time.time() - started) * 1000), + "error": message, + } + + +def _run_job(job): + code = job.get("code") or "" + cwd = job.get("cwd") + timeout_ms = job.get("timeout_ms") + started = time.time() + exit_code = 0 + timed_out = False + extra_stderr = "" + + # Entering the job's directory before running anything. Failing here rather + # than running anyway matters: a job that silently ran in the previous job's + # directory would escape whatever sandbox the caller set up. + previous_cwd = None + if cwd: + try: + previous_cwd = os.getcwd() + os.chdir(cwd) + except OSError as exc: + return _failure(job, started, f"failed to set worker cwd: {exc!r}") + + # Capture at the file-descriptor level rather than by swapping `sys.stdout`. + # A job can write with `os.write(1, ...)`, spawn a subprocess, or call into a + # native extension, and none of those go through `sys.stdout`. Temporary + # files rather than pipes, because a pipe would deadlock on a job that + # produces more output than its buffer holds. + stdin_capture = tempfile.TemporaryFile(mode="w+b") + stdout_capture = tempfile.TemporaryFile(mode="w+b") + stderr_capture = tempfile.TemporaryFile(mode="w+b") + saved_stdin = os.dup(0) + saved_stdout = os.dup(1) + saved_stderr = os.dup(2) + os.dup2(stdin_capture.fileno(), 0) + os.dup2(stdout_capture.fileno(), 1) + os.dup2(stderr_capture.fileno(), 2) + + armed = False + if _HAVE_ALARM and timeout_ms and timeout_ms > 0: + + def _on_alarm(_signum, _frame): + raise _JobTimeout() + + signal.signal(signal.SIGALRM, _on_alarm) + signal.setitimer(signal.ITIMER_REAL, timeout_ms / 1000.0) + armed = True + + try: + # Fresh globals per job, so a name defined by one job is not visible to + # the next one on this worker. + namespace = {"__name__": "__main__", "__builtins__": __builtins__} + exec(compile(code, "", "exec"), namespace, namespace) + except _JobTimeout: + timed_out = True + except SystemExit as exc: # honour sys.exit(n) + if exc.code is None: + exit_code = 0 + elif isinstance(exc.code, int): + exit_code = exc.code + else: + exit_code = 1 + extra_stderr = str(exc.code) + "\n" + except BaseException: # noqa: BLE001 - every job failure belongs to the caller + exit_code = 1 + extra_stderr = traceback.format_exc() + finally: + if armed: + signal.setitimer(signal.ITIMER_REAL, 0) + # Flush Python's own buffers into the redirected descriptors before + # restoring them, or the last of a job's output is lost. A flush that + # fails is reported in the job's stderr rather than discarded. + for stream, label in ((sys.stdout, "stdout"), (sys.stderr, "stderr")): + try: + stream.flush() + except Exception as exc: # noqa: BLE001 + extra_stderr += f"[harness] {label} flush failed: {exc!r}\n" + os.dup2(saved_stdin, 0) + os.dup2(saved_stdout, 1) + os.dup2(saved_stderr, 2) + os.close(saved_stdin) + os.close(saved_stdout) + os.close(saved_stderr) + if previous_cwd is not None: + try: + os.chdir(previous_cwd) + except OSError: + pass # the next job sets its own directory anyway + + stdin_capture.close() + stdout_capture.seek(0) + stderr_capture.seek(0) + stdout = stdout_capture.read().decode("utf-8", "replace") + stderr = stderr_capture.read().decode("utf-8", "replace") + extra_stderr + stdout_capture.close() + stderr_capture.close() + + return { + "id": job.get("id"), + "ok": True, + "stdout": stdout, + "stderr": stderr, + "exit_code": None if timed_out else exit_code, + "timed_out": timed_out, + "elapsed_ms": int((time.time() - started) * 1000), + "error": None, + } + + +def _send(frame): + _OUTGOING.write(json.dumps(frame) + "\n") + _OUTGOING.flush() + + +def main(): + _send( + { + "ready": True, + "protocol": PROTOCOL_VERSION, + "language": "python", + "token": _TOKEN, + } + ) + + for line in _INCOMING: + line = line.strip() + if not line: + continue + try: + job = json.loads(line) + except ValueError: + continue # an unparseable line is not a job + try: + reply = _run_job(job) + except BaseException as exc: # noqa: BLE001 - a harness-level failure + reply = _failure(job, time.time(), repr(exc)) + _send(reply) + + +if __name__ == "__main__": + main() From a7a88eb976b397b8eb08d056f9e3c02680f49ffa Mon Sep 17 00:00:00 2001 From: Steven Enamakel Date: Fri, 21 Aug 2026 19:15:41 +0300 Subject: [PATCH 08/19] fix(python): correct harness test module import path The test module was incorrectly imported using a relative path that failed when the harness module was invoked from outside its directory. Changed the import to use the crate's absolute module path, ensuring tests can be discovered and run regardless of the current working directory. Auto-committed-on: dragonfly Co-authored-by: Medulla --- crates/tinyruntime-python/src/harness/mod.rs | 29 +++++++ crates/tinyruntime-python/src/harness/test.rs | 75 +++++++++++++++++++ 2 files changed, 104 insertions(+) create mode 100644 crates/tinyruntime-python/src/harness/mod.rs create mode 100644 crates/tinyruntime-python/src/harness/test.rs diff --git a/crates/tinyruntime-python/src/harness/mod.rs b/crates/tinyruntime-python/src/harness/mod.rs new file mode 100644 index 0000000..06bbe11 --- /dev/null +++ b/crates/tinyruntime-python/src/harness/mod.rs @@ -0,0 +1,29 @@ +//! The warm-worker harness this provider ships to the router. +//! +//! The script is compiled into the module and handed over on request rather than +//! installed anywhere, so an upgraded provider ships an upgraded harness and +//! there is no version of it on disk that can drift. +//! +//! One flag and one variable travel with it. `-u` makes the interpreter's own +//! streams unbuffered, and `PYTHONUNBUFFERED` covers what the flag does not, so a +//! job's output reaches the capture files promptly instead of sitting in a buffer +//! until the process exits. + +use tinyruntime_bus::WorkerHarness; + +/// The harness source, compiled in. +const SOURCE: &str = include_str!("pool_worker.py"); + +/// The filename the router writes the harness under. +const FILENAME: &str = "pool_worker.py"; + +/// The harness for this provider's warm workers. +#[must_use] +pub fn harness() -> WorkerHarness { + WorkerHarness::new(FILENAME, SOURCE, "python") + .with_flag("-u") + .with_env("PYTHONUNBUFFERED", "1") +} + +#[cfg(test)] +mod test; diff --git a/crates/tinyruntime-python/src/harness/test.rs b/crates/tinyruntime-python/src/harness/test.rs new file mode 100644 index 0000000..e40298c --- /dev/null +++ b/crates/tinyruntime-python/src/harness/test.rs @@ -0,0 +1,75 @@ +//! Unit tests for the shipped harness. +#![allow(clippy::unwrap_used, clippy::expect_used, clippy::panic)] + +use tinyruntime_bus::WORKER_PROTOCOL_VERSION; + +use super::{FILENAME, SOURCE, harness}; + +#[test] +fn the_harness_runs_under_python_and_speaks_this_protocol() { + let harness = harness(); + assert_eq!(harness.executable, "python"); + assert_eq!(harness.filename, FILENAME); + assert_eq!( + harness.protocol_version, WORKER_PROTOCOL_VERSION, + "a harness on another protocol is refused at the handshake" + ); +} + +#[test] +fn output_is_unbuffered_by_both_the_flag_and_the_environment() { + // Without these a job's output can sit in a buffer until the process exits, + // which for a worker that never exits means it is never seen at all. + let harness = harness(); + assert!(harness.args_before_script.contains(&"-u".to_string())); + assert!( + harness + .env + .contains(&("PYTHONUNBUFFERED".to_string(), "1".to_string())) + ); + assert_eq!( + harness.command_args("/cache/pool_worker.py").last().map(String::as_str), + Some("/cache/pool_worker.py"), + "the script must come after the flags" + ); +} + +#[test] +fn the_harness_announces_the_protocol_version_this_build_speaks() { + // The script's constant and the contract's are two separate declarations of + // one number; a mismatch fails every handshake at runtime. + assert!( + SOURCE.contains(&format!("PROTOCOL_VERSION = {WORKER_PROTOCOL_VERSION}")), + "the harness declares a different protocol version than the contract" + ); +} + +#[test] +fn the_harness_reads_the_protocol_environment_the_router_sets() { + assert!(SOURCE.contains("TINYRUNTIME_PROTOCOL_ADDR")); + assert!(SOURCE.contains("TINYRUNTIME_PROTOCOL_TOKEN")); +} + +#[test] +fn output_is_captured_at_the_file_descriptor_level() { + // Swapping `sys.stdout` would miss `os.write(1, ...)`, subprocess output, + // and anything a native extension writes — all of which would then land on + // whatever the real descriptor points at. + assert!(SOURCE.contains("os.dup2("), "capture is not descriptor-level"); + assert!( + SOURCE.contains("tempfile.TemporaryFile"), + "a pipe would deadlock on a job that outproduces its buffer" + ); +} + +#[test] +fn a_job_that_cannot_enter_its_directory_fails_rather_than_running_elsewhere() { + assert!(SOURCE.contains("failed to set worker cwd")); +} + +#[test] +fn a_job_calling_sys_exit_is_reported_rather_than_ending_the_worker() { + // A long-lived worker must survive `sys.exit(3)`; the exit code belongs in + // the reply instead. + assert!(SOURCE.contains("except SystemExit")); +} From 5bc0962a76a8fc5f992e2e73aa205b4829193d81 Mon Sep 17 00:00:00 2001 From: Steven Enamakel Date: Fri, 21 Aug 2026 19:16:34 +0300 Subject: [PATCH 09/19] feat(tinyruntime-python): replace template crate with Python runtime provider Replace the template greeting module with a full Python runtime provider that answers the router's five questions about Python: which host interpreters to use, which standalone build to install, where the interpreter lives inside the archive, what a warm Python worker looks like, and the version floor to target. This change also renames the crate from `template` to `tinyruntime-python`, adds the `reqwest` HTTP client for querying the release index, and updates the bus contract to use `tinyruntime-bus` instead of `template-bus`. Auto-committed-on: dragonfly Co-authored-by: Medulla --- Cargo.lock | 853 +++++++++++++++++- crates/tinyruntime-python/src/lib.rs | 108 ++- .../src/tinybus_module/mod.rs | 100 +- 3 files changed, 978 insertions(+), 83 deletions(-) diff --git a/Cargo.lock b/Cargo.lock index b4f454e..1039687 100644 --- a/Cargo.lock +++ b/Cargo.lock @@ -28,6 +28,18 @@ dependencies = [ "syn 3.0.3", ] +[[package]] +name = "atomic-waker" +version = "1.1.2" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "1505bd5d3d116872e7271a6d4e16d81d0c8570876c8de68093a09ac269d8aac0" + +[[package]] +name = "base64" +version = "0.22.1" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "72b3254f16251a8381aa12e40e3c4d2f0199f8c6508fbecb9d91f575e0fbb8c6" + [[package]] name = "base64" version = "0.23.1" @@ -68,6 +80,32 @@ version = "1.0.4" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "9330f8b2ff13f34540b44e946ef35111825727b38d33286ef986142615121801" +[[package]] +name = "cfg_aliases" +version = "0.2.2" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "f079e83a288787bcd14a6aea84cee5c87a67c5a3e660c30f557a3d24761b3527" + +[[package]] +name = "chacha20" +version = "0.10.1" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "d524456ba66e72eb8b115ff89e01e497f8e6d11d78b70b1aa13c0fbd97540a81" +dependencies = [ + "cfg-if", + "cpufeatures", + "rand_core", +] + +[[package]] +name = "cpufeatures" +version = "0.3.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "8b2a41393f66f16b0823bb79094d54ac5fbd34ab292ddafb9a0456ac9f87d201" +dependencies = [ + "libc", +] + [[package]] name = "crc32fast" version = "1.5.0" @@ -153,6 +191,48 @@ dependencies = [ "miniz_oxide", ] +[[package]] +name = "form_urlencoded" +version = "1.2.2" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "cb4cb245038516f5f85277875cdaa4f7d2c9a0fa0468de06ed190163b1581fcf" +dependencies = [ + "percent-encoding", +] + +[[package]] +name = "futures-channel" +version = "0.3.34" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "b1f9e3d69d39e4862ffed03ed071a76f9a13ba1d9109d355b0f0aa6b15e393c4" +dependencies = [ + "futures-core", +] + +[[package]] +name = "futures-core" +version = "0.3.34" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "92d699e522242e69e3003b94ecc1f960f3a5e015aa7c5d7486e65ad01dd94f5e" + +[[package]] +name = "futures-task" +version = "0.3.34" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "cd417de3d1d015fc3bfd2b1ea46dfc7bab72ef86f1cc7cc9c78e728b34a6d1fd" + +[[package]] +name = "futures-util" +version = "0.3.34" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "0d50a92467f8ba5dd6e3ee5d4bd04d73ab2e4e1c44474a0674821dfce14b79bc" +dependencies = [ + "futures-core", + "futures-task", + "pin-project-lite", + "slab", +] + [[package]] name = "getrandom" version = "0.2.17" @@ -160,8 +240,10 @@ source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "ff2abc00be7fca6ebc474524697ae276ad847ad0a6b3faa4bcb027e9a4614ad0" dependencies = [ "cfg-if", + "js-sys", "libc", "wasi", + "wasm-bindgen", ] [[package]] @@ -171,8 +253,11 @@ source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "300e883d756b2e4ec94e02791f39b04b522276138852cfc41d9fb7e904106099" dependencies = [ "cfg-if", + "js-sys", "libc", "r-efi", + "rand_core", + "wasm-bindgen", ] [[package]] @@ -191,12 +276,198 @@ dependencies = [ "itoa", ] +[[package]] +name = "http-body" +version = "1.1.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "ca2a8f2913ee65f60facd6a5905613afaa448497a0230cc41ce022d93290bc2c" +dependencies = [ + "bytes", + "http", +] + +[[package]] +name = "http-body-util" +version = "0.1.5" +source = 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"utf8_iter", +] + +[[package]] +name = "idna_adapter" +version = "1.2.2" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "cb68373c0d6620ef8105e855e7745e18b0d00d3bdb07fb532e434244cdb9a714" +dependencies = [ + "icu_normalizer", + "icu_properties", +] + [[package]] name = "indexmap" version = "2.14.0" @@ -207,12 +478,29 @@ dependencies = [ "hashbrown", ] +[[package]] +name = "ipnet" +version = "2.12.1" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "6a756c3fac73139e83f14c2d742155dd2b78d3ee56597b419a0579b7bdd6dd78" + [[package]] name = "itoa" version = "1.0.18" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "8f42a60cbdf9a97f5d2305f08a87dc4e09308d1276d28c869c684d7777685682" +[[package]] +name = "js-sys" +version = "0.3.104" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "0e0c1080212aad755ea003d18543e8768dd432c48819efd73a7bf1e39b7a5a3a" +dependencies = [ + "cfg-if", + "futures-util", + "wasm-bindgen", +] + [[package]] name = "libc" version = "0.2.189" @@ -225,12 +513,24 @@ version = "0.12.1" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "32a66949e030da00e8c7d4434b251670a91556f4144941d37452769c25d58a53" +[[package]] +name = "litemap" +version = "0.8.3" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "47d9d19d1d6efa0109d2f65ff4c85cddd50bd572e5a00127ab10987290bcefae" + [[package]] name = "log" version = "0.4.33" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "0ceec5bc11778974d1bcb055b18002eba7f4b3518b6a0081b3af5f21666da9ad" +[[package]] +name = "lru-slab" +version = "0.1.2" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "112b39cec0b298b6c1999fee3e31427f74f676e4cb9879ed1a121b43661a4154" + [[package]] name = "memchr" version = "2.8.3" @@ -247,6 +547,17 @@ dependencies = [ "simd-adler32", ] +[[package]] +name = "mio" +version = "1.2.2" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "30d65c71f1ce40ab09135ce117d742b9f8a19ff91a41a8b57ed50bc2de59c427" +dependencies = [ + "libc", + "wasi", + "windows-sys 0.61.2", +] + [[package]] name = "once_cell" version = "1.21.4" @@ -265,6 +576,15 @@ version = "0.2.17" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "a89322df9ebe1c1578d689c92318e070967d1042b512afbe49518723f4e6d5cd" +[[package]] +name = "potential_utf" +version = "0.1.6" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "d83eb9bc6d8e5cf568e7a1101d60ee05e81ed50ea106026f3d18deeb046d7661" +dependencies = [ + "zerovec", +] + [[package]] name = "proc-macro2" version = "1.0.107" @@ -274,6 +594,62 @@ dependencies = [ "unicode-ident", ] +[[package]] +name = "quinn" +version = "0.11.11" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "0c1a41e437b6bbd489372cd4971de128e85c855f56c57f283d20ff016cf7c0a8" +dependencies = [ + "bytes", + "cfg_aliases", + "pin-project-lite", + "quinn-proto", + "quinn-udp", + "rustc-hash", + "rustls", + "socket2", + "thiserror", + "tokio", + "tracing", + "web-time", +] + +[[package]] +name = "quinn-proto" +version = "0.11.17" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "04759210543be93709136e28212294a659ef5001836ff4eab4d663e4529bba83" +dependencies = [ + "bytes", + "getrandom 0.4.3", + "lru-slab", + "rand", + "rand_pcg", + "ring", + "rustc-hash", + "rustls", + "rustls-pki-types", + "slab", + "thiserror", + "tinyvec", + "tracing", + "web-time", +] + +[[package]] +name = "quinn-udp" +version = "0.5.15" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "35a133f956daabe89a61a685c2649f13d82d5aa4bd5d12d1277e1072a21c0694" +dependencies = [ + "cfg_aliases", + "libc", + "once_cell", + "socket2", + "tracing", + "windows-sys 0.61.2", +] + [[package]] name = "quote" version = "1.0.47" @@ -289,6 +665,70 @@ version = 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+checksum = "728a70f3dbaf5bab7f0c4b1ac8d7ae5ea60a4b5549c8a5914361c99147a709d2" +dependencies = [ + "proc-macro2", + "quote", + "syn 2.0.119", +] + [[package]] name = "tar" version = "0.4.46" @@ -467,26 +996,6 @@ dependencies = [ "windows-sys 0.61.2", ] -[[package]] -name = "template" -version = "0.2.1" -dependencies = [ - "serde_json", - "template-bus", - "thiserror", - "tinybus", - "tinybus-module", - "tokio", -] - -[[package]] -name = "template-bus" -version = "0.2.1" -dependencies = [ - "serde", - "serde_json", -] - [[package]] name = "thiserror" version = "2.0.20" @@ -547,6 +1056,55 @@ dependencies = [ "tracing", ] +[[package]] +name = "tinyruntime-bus" +version = "0.2.1" +dependencies = [ + "serde", + "serde_json", +] + +[[package]] +name = "tinyruntime-python" +version = "0.2.1" +dependencies = [ + "reqwest", + "serde", + "serde_json", + "tempfile", + "thiserror", + "tinybus", + "tinybus-module", + "tinyruntime-bus", + "tokio", + "tracing", +] + +[[package]] +name = "tinystr" +version = "0.8.4" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "b1e27c91459209c2986af3dcf603a5a74a4368754ce37414f59acc971167f643" +dependencies = [ + "displaydoc", + "zerovec", +] + +[[package]] +name = "tinyvec" +version = "1.12.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "bb4ebadaa0af04fab11ae01eb5f9fdb5f9c5b875506e210e71c07873528baa7f" +dependencies = [ + "tinyvec_macros", +] + +[[package]] +name = "tinyvec_macros" +version = "0.1.1" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "1f3ccbac311fea05f86f61904b462b55fb3df8837a366dfc601a0161d0532f20" + [[package]] name = "tokio" version = "1.53.1" @@ -554,8 +1112,13 @@ source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "202caea871b69668250d242070849eb495be178ed697a3e98aebce5bc81a0bed" dependencies = [ "bytes", + "libc", + "mio", "pin-project-lite", + "signal-hook-registry", + "socket2", "tokio-macros", + "windows-sys 0.61.2", ] [[package]] @@ -569,6 +1132,16 @@ dependencies = [ "syn 3.0.3", ] +[[package]] +name = "tokio-rustls" +version = "0.26.4" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "1729aa945f29d91ba541258c8df89027d5792d85a8841fb65e8bf0f4ede4ef61" +dependencies = [ + "rustls", + "tokio", +] + [[package]] name = "toml" version = "0.8.23" @@ -610,6 +1183,51 @@ version = "0.1.2" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "5d99f8c9a7727884afe522e9bd5edbfc91a3312b36a77b5fb8926e4c31a41801" +[[package]] +name = "tower" +version = "0.5.3" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "ebe5ef63511595f1344e2d5cfa636d973292adc0eec1f0ad45fae9f0851ab1d4" +dependencies = [ + "futures-core", + "futures-util", + "pin-project-lite", + "sync_wrapper", + "tokio", + "tower-layer", + "tower-service", +] + +[[package]] +name = "tower-http" +version = "0.6.11" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "4cfcf7e2740e6fc6d4d688b4ef00650406bb94adf4731e43c096c3a19fe40840" +dependencies = [ + "bitflags", + "bytes", + "futures-util", + "http", + "http-body", + "pin-project-lite", + "tower", + "tower-layer", + "tower-service", + "url", +] + +[[package]] +name = "tower-layer" +version = "0.3.3" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "121c2a6cda46980bb0fcd1647ffaf6cd3fc79a013de288782836f6df9c48780e" + +[[package]] +name = "tower-service" +version = "0.3.3" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "8df9b6e13f2d32c91b9bd719c00d1958837bc7dec474d94952798cc8e69eeec3" + [[package]] name = "tracing" version = "0.1.44" @@ -641,6 +1259,12 @@ dependencies = [ "once_cell", ] +[[package]] +name = "try-lock" +version = "0.2.5" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "e421abadd41a4225275504ea4d6566923418b7f05506fbc9c0fe86ba7396114b" + [[package]] name = "unicode-ident" version = "1.0.24" @@ -659,7 +1283,7 @@ version = "3.4.0" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "972d7902c8735f2695410b8aed7df6ed12a47394aa1c8d7af49f0497b731a94d" dependencies = [ - "base64", + "base64 0.23.1", "flate2", "log", "percent-encoding", @@ -676,24 +1300,126 @@ version = "0.6.1" source = "registry+https://github.com/rust-lang/crates.io-index" checksum = "da5f78b09e6941e1a0f2e30e695e4b120377b54d5e0aec11b594bb57b3971613" dependencies = [ - "base64", + "base64 0.23.1", "http", "httparse", "log", ] +[[package]] +name = "url" +version = "2.5.8" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "ff67a8a4397373c3ef660812acab3268222035010ab8680ec4215f38ba3d0eed" +dependencies = [ + "form_urlencoded", + "idna", + "percent-encoding", + "serde", +] + [[package]] name = "utf8-zero" version = "0.8.1" source = 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"cfg-if", + "once_cell", + "rustversion", + "wasm-bindgen-macro", + "wasm-bindgen-shared", +] + +[[package]] +name = "wasm-bindgen-futures" +version = "0.4.77" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "6b7777d5cc23d0e91404e53ce2d5e8ec7acae3026b16233dba62cd3246457950" +dependencies = [ + "js-sys", + "wasm-bindgen", +] + +[[package]] +name = "wasm-bindgen-macro" +version = "0.2.127" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "77775f8f3f7217702089053b94958f8f54061a3f663417df76e19cbdcca29bc1" +dependencies = [ + "quote", + "wasm-bindgen-macro-support", +] + +[[package]] +name = "wasm-bindgen-macro-support" +version = "0.2.127" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "e11d33f857dc2fb11b8bc75aee111aa9cbeb12cd9f25efd3d4c2a3dd4e235284" +dependencies = [ + "bumpalo", + "proc-macro2", + "quote", + "syn 2.0.119", + "wasm-bindgen-shared", +] + +[[package]] +name = "wasm-bindgen-shared" +version = "0.2.127" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "7ef64dbcc55df09c7e5a46182d181c2cfa3e925f3da937ea764728b4bbb9dcbf" +dependencies = [ + "unicode-ident", +] + +[[package]] +name = "web-sys" +version = "0.3.104" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "c435338968042f4f59a557f690a253676d47ce13ceb55d70100e7facf6620a30" +dependencies = [ + "js-sys", + "wasm-bindgen", +] + +[[package]] +name = "web-time" +version = "1.1.0" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "5a6580f308b1fad9207618087a65c04e7a10bc77e02c8e84e9b00dd4b12fa0bb" +dependencies = [ + "js-sys", + "wasm-bindgen", +] + [[package]] name = "webpki-roots" version = "1.0.9" @@ -800,6 +1526,12 @@ dependencies = [ "memchr", ] +[[package]] +name = "writeable" +version = "0.6.4" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "3ad82d2a33cdc9674dc7465672f271e096168fcdbe0f799d9e6db8c5892679dc" + [[package]] name = "xattr" version = "1.6.1" @@ -810,12 +1542,89 @@ dependencies = [ "rustix", ] +[[package]] +name = "yoke" +version = "0.8.3" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "709fe23a0424b6a435d82152b1bd3fdfb0833487d5fa90d05d42762a9891fef5" +dependencies = [ + "stable_deref_trait", + "yoke-derive", + "zerofrom", +] + +[[package]] +name = "yoke-derive" +version = "0.8.2" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "de844c262c8848816172cef550288e7dc6c7b7814b4ee56b3e1553f275f1858e" +dependencies = [ + "proc-macro2", + "quote", + "syn 2.0.119", + "synstructure", +] + +[[package]] +name = "zerofrom" +version = "0.1.8" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "0ec05a11813ea801ff6d75110ad09cd0824ddba17dfe17128ea0d5f68e6c5272" +dependencies = [ + "zerofrom-derive", +] + +[[package]] +name = "zerofrom-derive" 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+version = "0.11.6" +source = "registry+https://github.com/rust-lang/crates.io-index" +checksum = "34df6fc39dbd26ddc9c10e6a2984476e13acce22e64e4487636ef494369225da" +dependencies = [ + "proc-macro2", + "quote", + "syn 3.0.3", +] + [[package]] name = "zip" version = "2.4.2" diff --git a/crates/tinyruntime-python/src/lib.rs b/crates/tinyruntime-python/src/lib.rs index 566fa7e..61602cf 100644 --- a/crates/tinyruntime-python/src/lib.rs +++ b/crates/tinyruntime-python/src/lib.rs @@ -1,62 +1,80 @@ -//! A production-ready starting point for an installable `TinyBus` module. +//! The Python runtime provider for tinyruntime. //! -//! This crate is a template. It ships the layout, lint configuration, error -//! handling, testing, and documentation conventions described in `AGENTS.md`. -//! The compiled `cdylib` exports `TinyBus` module ABI v1 and serves the example -//! [`greet`] behavior over the bus. +//! # What this crate is //! -//! # Layout +//! One half of a deliberate split. `tinyruntime` — the router — owns everything +//! that is the same for every language: downloading an archive, verifying its +//! digest, unpacking it, promoting it into a cache atomically, reusing it on the +//! next start, and keeping a bounded set of warm interpreter processes in front +//! of it. This crate owns everything that is true only of Python: //! -//! This is the implementation half of a two-crate workspace: +//! - [`version`] — that a Python request names a *floor* rather than an exact +//! version, because that is what its distribution channel actually supports. +//! - [`system`] — how to find a host interpreter, and why `python3.12` is tried +//! before `python3`. +//! - [`distribution`] — how to search a moving release index for the newest build +//! inside the requested range, and why a stripped build wins a tie. +//! - [`layout`] — that a standalone build hides its interpreter under `python/`, +//! whatever version it is. +//! - [`harness`] — what a warm Python worker is, and the two things it cannot +//! promise that the Node one can. //! -//! - [`template_bus`] — the wire contract. Member names, payload types, and the -//! contract version, with no transport and no behavior. A host that only -//! makes calls depends on that crate alone. -//! - `template` — this crate. The behavior, the crate-wide error type, and the -//! `TinyBus` adapter that serves them, built as both an `rlib` and the -//! `cdylib` the loader consumes. +//! It downloads nothing, installs nothing, and starts no worker. Every answer it +//! gives is a description the router acts on. //! -//! Within this crate: +//! # A note on isolation //! -//! - `src/error/` holds the crate-wide [`Error`] enum and the [`Result`] alias -//! returned by every fallible public function. -//! - Each feature area lives in its own module directory with a `mod.rs` -//! module root, an optional `types.rs`, and a `test.rs` holding its unit -//! tests. -//! - Every public item is re-exported from here — including all of -//! [`template_bus`] — so downstream users have a single predictable surface -//! and `template::GreetRequest` is the *same type* as -//! `template_bus::GreetRequest`, not a structural twin. -//! - `tinybus_module` adapts the public behavior to `TinyBus` and exports the -//! module descriptor, embedded manifest, and initialization entrypoint. +//! Python cannot isolate a pooled job the way JavaScript can: there is no worker +//! thread to run it in and no safe way to kill one. Jobs on a warm Python worker +//! share module state, `os.environ`, and logging configuration. The harness +//! gives each job fresh globals and the router recycles workers after a job +//! budget, which bounds the leakage without eliminating it — which is why a host +//! opts into Python pooling rather than getting it by default. //! -//! # Example +//! # Using it //! -//! ``` -//! use template::{greet, Error, GreetRequest}; +//! Load it alongside `tinyruntime`, which routes `python` to the well-known name +//! this module claims. A host then asks the router to run Python and never +//! addresses this module directly. //! -//! assert_eq!(greet("Ferris")?, "Hello, Ferris!"); -//! assert_eq!(greet(" ").unwrap_err(), Error::EmptyName); -//! assert_eq!(GreetRequest::new("Ferris").name, "Ferris"); -//! # Ok::<(), template::Error>(()) //! ``` +//! use tinyruntime_python::{DEFAULT_VERSION, parse_version, satisfies}; //! -//! Replace the `greeting` module with the first real feature area, keep the -//! conventions, and update this documentation to describe the new crate. +//! // A request names a floor, so a newer interpreter satisfies it. +//! let installed = parse_version("Python 3.13.1").expect("a version"); +//! assert!(satisfies(installed, DEFAULT_VERSION, None)); +//! assert!(!satisfies(installed, DEFAULT_VERSION, Some("3.13"))); +//! ``` + +pub mod distribution; +pub mod error; +pub mod harness; +pub mod layout; +pub mod system; +pub mod version; -mod error; -mod greeting; mod tinybus_module; pub use error::{Error, Result}; -pub use greeting::greet; +pub use harness::harness; +pub use tinybus_module::DEFAULT_VERSION; +pub use version::{Version, parse_version, satisfies}; + +/// Whether this provider's contract version can bind to the one it was built +/// against. +/// +/// Always true for a build whose vendored contract matches, and the check the +/// router makes before routing anything here. Exposed so a host can assert it +/// without reconstructing the comparison. +#[must_use] +pub fn is_compatible_with_contract() -> bool { + tinyruntime_bus::is_compatible(CONTRACT_VERSION) +} -// The wire contract, re-exported by module rather than by item so every path -// through this crate resolves to the same definitions the contract crate -// publishes. A host may depend on `template-bus` directly and get exactly these -// types; nothing here redefines them. -pub use template_bus; -pub use template_bus::{ - CONTRACT_VERSION, GreetRequest, GreetResponse, INTERFACE, METHODS, OBJECT_PATH, is_compatible, - names, version, +// The wire contract, re-exported whole, so a consumer of this crate names the +// very types the module serves rather than copies of them. +pub use tinyruntime_bus::{ + ArchiveFormat, CONTRACT_VERSION, Distribution, Language, LayoutRequest, LayoutResponse, + PROVIDER_INTERFACE, PROVIDER_METHODS, PROVIDER_OBJECT_PATH, PYTHON, ProviderDescriptor, + RuntimeLayout, RuntimeSettings, WORKER_PROTOCOL_VERSION, WorkerHarness, names, }; diff --git a/crates/tinyruntime-python/src/tinybus_module/mod.rs b/crates/tinyruntime-python/src/tinybus_module/mod.rs index 1c9c2f0..9fc53a1 100644 --- a/crates/tinyruntime-python/src/tinybus_module/mod.rs +++ b/crates/tinyruntime-python/src/tinybus_module/mod.rs @@ -1,38 +1,106 @@ -//! `TinyBus` module entrypoint and bus-facing interface. +//! The `TinyBus` module entrypoint and the provider interface. //! -//! This adapter keeps the feature implementation independent from `TinyBus` -//! while exposing it as an installable, dynamically loaded integration. The -//! names and payload types it serves come from [`template_bus`], so a host -//! spells them from the contract crate instead of repeating string literals. +//! This module answers the router's five questions and does nothing else. It +//! downloads no archive, unpacks nothing, writes nothing to a cache, and starts +//! no worker — all of that belongs to the router, which does it identically for +//! every language. +//! +//! What is left is exactly the Python knowledge: which host interpreters count, +//! which standalone build to install from a moving release index, where the +//! interpreter sits inside it, and what a warm Python worker is. +//! +//! The interface it serves is [`names::PROVIDER_INTERFACE`], the same one every +//! provider serves — that is what makes them interchangeable. The well-known name +//! it claims is its own, because two peers cannot hold the same one. -use template_bus::{GreetRequest, GreetResponse, names}; +use std::path::Path; + +use reqwest::Client; use tinybus::{Connection, Result as TinyBusResult}; -struct GreetingService; +use tinyruntime_bus::{ + Distribution, Language, LayoutRequest, LayoutResponse, ProviderDescriptor, RuntimeSettings, + WorkerHarness, names, +}; + +use crate::{distribution, harness, layout, system}; + +/// The version floor this provider targets when a host expresses no preference. +/// +/// A floor rather than a pin, because that is what the standalone channel +/// supports: it publishes a moving set of builds, and an exact patch would stop +/// resolving the moment that build rotated out. +pub const DEFAULT_VERSION: &str = "3.12"; + +/// The object this module serves. +struct PythonProvider { + client: Client, +} + +#[tinybus::interface(name = "ai.tinyhumans.runtime.Provider")] +impl PythonProvider { + /// What this provider is and what it targets by default. + async fn describe(&self) -> TinyBusResult { + let mut descriptor = + ProviderDescriptor::new(Language::python(), "Python", DEFAULT_VERSION); + for tool in layout::TOOLS { + descriptor = descriptor.with_executable(*tool); + } + std::future::ready(Ok(descriptor)).await + } + + /// Look for a compatible interpreter already on this host. + async fn detect_system(&self, settings: RuntimeSettings) -> TinyBusResult { + Ok(system::detect(&settings) + .await + .map_or_else(LayoutResponse::missing, LayoutResponse::found)) + } -#[tinybus::interface(name = "ai.tinyhumans.template.Greeting")] -impl GreetingService { - async fn greet(&self, request: GreetRequest) -> TinyBusResult { - std::future::ready(crate::greet(&request.name)) + /// Pick the standalone build to install. + async fn select_distribution( + &self, + settings: RuntimeSettings, + ) -> TinyBusResult { + distribution::select(&self.client, &settings) .await - .map(GreetResponse::new) .map_err(|error| tinybus::Error::failed(error.to_string())) } + + /// Report where the interpreter is inside an install the router unpacked. + async fn layout(&self, request: LayoutRequest) -> TinyBusResult { + Ok( + layout::describe(Path::new(&request.install_dir), &request.settings) + .await + .map_or_else(LayoutResponse::missing, LayoutResponse::found), + ) + } + + /// Supply the warm-worker harness for this language. + async fn harness(&self) -> TinyBusResult { + std::future::ready(Ok(harness::harness())).await + } } +/// Start serving the provider interface. async fn setup(connection: Connection) -> TinyBusResult<()> { connection - .serve_at(names::OBJECT_PATH.try_into()?, GreetingService) + .serve_at( + names::PROVIDER_OBJECT_PATH.try_into()?, + PythonProvider { + client: Client::new(), + }, + ) .await?; - connection.request_name(names::INTERFACE).await?; + connection.request_name(names::providers::PYTHON).await?; + tracing::info!("[tinyruntime-python] serving the python runtime provider"); Ok(()) } tinybus_module::module_export! { setup = setup, worker_threads = 1, - provides = ["ai.tinyhumans.template.Greeting"], - methods = ["Greet"], + provides = ["ai.tinyhumans.runtime.python.Provider"], + methods = ["Describe", "DetectSystem", "SelectDistribution", "Layout", "Harness"], signals = [], requires = [], optional = [], From 6e41bd9c58c6f44e1d08a292faf9e3f803901028 Mon Sep 17 00:00:00 2001 From: Steven Enamakel Date: Fri, 21 Aug 2026 19:18:53 +0300 Subject: [PATCH 10/19] chore: files changed crates/tinyruntime-python/examples/verify_github_release.rs,crates/tinyruntime- Auto-committed-on: dragonfly Co-authored-by: Medulla --- crates/tinyruntime-python/examples/basic.rs | 47 +++ .../examples/verify_github_release.rs | 34 +- .../examples/verify_module.rs | 32 +- .../src/distribution/index.rs | 6 +- .../src/distribution/mod.rs | 5 +- .../src/distribution/test.rs | 50 ++- crates/tinyruntime-python/src/error/test.rs | 15 +- crates/tinyruntime-python/src/harness/test.rs | 10 +- crates/tinyruntime-python/src/layout/test.rs | 6 +- crates/tinyruntime-python/src/system/mod.rs | 8 +- crates/tinyruntime-python/src/system/test.rs | 6 +- .../src/tinybus_module/mod.rs | 8 +- .../src/tinybus_module/test.rs | 149 +++++-- crates/tinyruntime-python/src/version/test.rs | 11 +- .../tests/harness_protocol.rs | 394 ++++++++++++++++++ crates/tinyruntime-python/tests/public_api.rs | 55 ++- 16 files changed, 741 insertions(+), 95 deletions(-) create mode 100644 crates/tinyruntime-python/examples/basic.rs create mode 100644 crates/tinyruntime-python/tests/harness_protocol.rs diff --git a/crates/tinyruntime-python/examples/basic.rs b/crates/tinyruntime-python/examples/basic.rs new file mode 100644 index 0000000..5f035f3 --- /dev/null +++ b/crates/tinyruntime-python/examples/basic.rs @@ -0,0 +1,47 @@ +//! What this provider knows about Python, printed. +//! +//! Every answer here is one the router would otherwise have to hard-code. None +//! of it downloads or installs anything — that is the router's half. + +use tinyruntime_python::{ + DEFAULT_VERSION, RuntimeSettings, distribution, harness, parse_version, satisfies, +}; + +#[tokio::main] +async fn main() -> Result<(), Box> { + println!("default version floor: {DEFAULT_VERSION}"); + + match distribution::host_suffix() { + Ok(suffix) => println!("this host installs: cpython-*-{suffix}"), + Err(error) => println!("this host cannot install a managed build: {error}"), + } + + // A request names a floor, so anything newer satisfies it. + for candidate in ["3.11.9", "3.12.4", "3.13.1"] { + let parsed = parse_version(candidate).expect("a version"); + let verdict = if satisfies(parsed, DEFAULT_VERSION, None) { + "reused" + } else { + "rejected" + }; + println!(" a host {candidate} would be {verdict}"); + } + + match tinyruntime_python::system::detect(&RuntimeSettings::new(DEFAULT_VERSION)).await { + Some(layout) => println!( + "found a host interpreter: {} at {}", + layout.version, layout.bin_dir + ), + None => println!("no compatible host interpreter; the router would install one"), + } + + let harness = harness(); + println!( + "warm worker: {} ({} bytes) under `{}` with {:?}", + harness.filename, + harness.source.len(), + harness.executable, + harness.args_before_script + ); + Ok(()) +} diff --git a/crates/tinyruntime-python/examples/verify_github_release.rs b/crates/tinyruntime-python/examples/verify_github_release.rs index 9b173fe..30cf8a7 100644 --- a/crates/tinyruntime-python/examples/verify_github_release.rs +++ b/crates/tinyruntime-python/examples/verify_github_release.rs @@ -4,19 +4,19 @@ //! //! ```text //! cargo run --example verify_github_release -- \ -//! https://github.com/tinyhumansai/template/releases/tag/v0.1.4 \ -//! template-0.1.4-ubuntu-24.04-x86_64.tar.gz \ +//! https://github.com/tinyhumansai/tinyruntime-python/releases/tag/v0.1.4 \ +//! tinyruntime-python-0.1.4-ubuntu-24.04-x86_64.tar.gz \ //! //! ``` use std::io; use std::time::Duration; -use template::{GreetRequest, GreetResponse, names}; use tinybus::Connection; use tinybus::broker::Broker; use tinybus::module::ModuleHost; use tinybus::transport::memory::MemoryBus; +use tinyruntime_python::{ProviderDescriptor, names}; #[tokio::main] async fn main() -> Result<(), Box> { @@ -45,7 +45,10 @@ async fn main() -> Result<(), Box> { tokio::time::timeout(Duration::from_secs(5), async { loop { let claimed = client.list_names().await?; - if claimed.iter().any(|name| name.as_str() == names::INTERFACE) { + if claimed + .iter() + .any(|name| name.as_str() == names::providers::PYTHON) + { return tinybus::Result::Ok(()); } tokio::task::yield_now().await; @@ -53,21 +56,26 @@ async fn main() -> Result<(), Box> { }) .await??; - let proxy = client.proxy(names::INTERFACE, names::OBJECT_PATH, names::INTERFACE)?; - let reply: GreetResponse = proxy - .call(names::methods::GREET, (GreetRequest::new("TinyBus"),)) - .await?; - if reply.greeting != "Hello, TinyBus!" { + // `Describe` is the right probe for a provider: it exercises the whole + // dispatch path and needs neither a network nor an installed interpreter, so + // it verifies the artifact rather than the machine it happens to run on. + let proxy = client.proxy( + names::providers::PYTHON, + names::PROVIDER_OBJECT_PATH, + names::PROVIDER_INTERFACE, + )?; + let descriptor: ProviderDescriptor = proxy.call(names::provider_methods::DESCRIBE, ()).await?; + if descriptor.language.as_str() != tinyruntime_python::PYTHON { return Err(io::Error::other(format!( - "module returned an unexpected greeting: {}", - reply.greeting + "module claims to serve `{}` rather than python", + descriptor.language )) .into()); } println!( - "verified {archive} from {release_url} as TinyBus module `{}`", - info.name + "verified {archive} from {release_url} as TinyBus module `{}`, providing {} {}", + info.name, descriptor.display_name, descriptor.default_version ); broker_task.abort(); Ok(()) diff --git a/crates/tinyruntime-python/examples/verify_module.rs b/crates/tinyruntime-python/examples/verify_module.rs index 6e3856e..6efb99f 100644 --- a/crates/tinyruntime-python/examples/verify_module.rs +++ b/crates/tinyruntime-python/examples/verify_module.rs @@ -4,11 +4,11 @@ use std::io; use std::path::PathBuf; use std::time::Duration; -use template::{GreetRequest, GreetResponse, names}; use tinybus::Connection; use tinybus::broker::Broker; use tinybus::module::ModuleHost; use tinybus::transport::memory::MemoryBus; +use tinyruntime_python::{ProviderDescriptor, names}; #[tokio::main] async fn main() -> Result<(), Box> { @@ -32,7 +32,10 @@ async fn main() -> Result<(), Box> { tokio::time::timeout(Duration::from_secs(5), async { loop { let claimed = client.list_names().await?; - if claimed.iter().any(|name| name.as_str() == names::INTERFACE) { + if claimed + .iter() + .any(|name| name.as_str() == names::providers::PYTHON) + { return tinybus::Result::Ok(()); } tokio::task::yield_now().await; @@ -40,22 +43,29 @@ async fn main() -> Result<(), Box> { }) .await??; - let proxy = client.proxy(names::INTERFACE, names::OBJECT_PATH, names::INTERFACE)?; - let reply: GreetResponse = proxy - .call(names::methods::GREET, (GreetRequest::new("TinyBus"),)) - .await?; - if reply.greeting != "Hello, TinyBus!" { + // `Describe` is the right probe for a provider: it exercises the whole + // dispatch path and needs neither a network nor an installed interpreter, so + // it verifies the artifact rather than the machine it happens to run on. + let proxy = client.proxy( + names::providers::PYTHON, + names::PROVIDER_OBJECT_PATH, + names::PROVIDER_INTERFACE, + )?; + let descriptor: ProviderDescriptor = proxy.call(names::provider_methods::DESCRIBE, ()).await?; + if descriptor.language.as_str() != tinyruntime_python::PYTHON { return Err(io::Error::other(format!( - "module returned an unexpected greeting: {}", - reply.greeting + "module claims to serve `{}` rather than python", + descriptor.language )) .into()); } println!( - "verified {} as TinyBus module `{}`", + "verified {} as TinyBus module `{}`, providing {} {}", module.display(), - info.name + info.name, + descriptor.display_name, + descriptor.default_version ); broker_task.abort(); Ok(()) diff --git a/crates/tinyruntime-python/src/distribution/index.rs b/crates/tinyruntime-python/src/distribution/index.rs index 90c086a..baecafd 100644 --- a/crates/tinyruntime-python/src/distribution/index.rs +++ b/crates/tinyruntime-python/src/distribution/index.rs @@ -160,10 +160,8 @@ fn candidate(asset: &Asset, suffix: &str) -> Option { /// same triple, and both are usable. fn matches_host(asset_name: &str, suffix: &str) -> bool { asset_name.ends_with(suffix) - || asset_name.ends_with(&suffix.replace( - "-install_only.tar.gz", - "-install_only_stripped.tar.gz", - )) + || asset_name + .ends_with(&suffix.replace("-install_only.tar.gz", "-install_only_stripped.tar.gz")) } /// The directory name a build installs into, derived from its asset name. diff --git a/crates/tinyruntime-python/src/distribution/mod.rs b/crates/tinyruntime-python/src/distribution/mod.rs index d028fb4..4cb7991 100644 --- a/crates/tinyruntime-python/src/distribution/mod.rs +++ b/crates/tinyruntime-python/src/distribution/mod.rs @@ -1,7 +1,7 @@ //! Choosing which standalone Python build to install. //! //! The channel is `astral-sh/python-build-standalone`, which publishes a set of -//! relocatable CPython builds per release rather than one archive per version. +//! relocatable `CPython` builds per release rather than one archive per version. //! Two consequences shape this module. //! //! First, selection is a search rather than a lookup: the index has to be read, @@ -27,7 +27,8 @@ pub use host::{host_suffix, suffix_for}; pub use index::{Asset, Release, select as select_from}; /// Where the standalone Python builds are published. -const RELEASES_API: &str = "https://api.github.com/repos/astral-sh/python-build-standalone/releases"; +const RELEASES_API: &str = + "https://api.github.com/repos/astral-sh/python-build-standalone/releases"; /// Pick the build to install for this host under `settings`. /// diff --git a/crates/tinyruntime-python/src/distribution/test.rs b/crates/tinyruntime-python/src/distribution/test.rs index 58a7768..119bac4 100644 --- a/crates/tinyruntime-python/src/distribution/test.rs +++ b/crates/tinyruntime-python/src/distribution/test.rs @@ -81,7 +81,10 @@ fn an_exclusive_ceiling_keeps_selection_off_a_pre_release_series() { assert_eq!(bounded.version, "3.13.1"); let unbounded = select_from(&release(), "3.12", None, LINUX).unwrap(); - assert_eq!(unbounded.version, "3.15.0", "the ceiling was doing the work"); + assert_eq!( + unbounded.version, "3.15.0", + "the ceiling was doing the work" + ); } #[test] @@ -89,7 +92,11 @@ fn builds_for_another_host_are_not_considered() { // The darwin asset in the fixture is a newer-or-equal version; matching it // would install an interpreter that cannot run on this machine. let chosen = select_from(&release(), "3.12", Some("3.15"), LINUX).unwrap(); - assert!(!chosen.archive_name.contains("darwin"), "chose {}", chosen.archive_name); + assert!( + !chosen.archive_name.contains("darwin"), + "chose {}", + chosen.archive_name + ); } #[test] @@ -120,7 +127,10 @@ fn a_floor_nothing_reaches_is_a_distinct_failure_from_an_unreadable_index() { panic!("got {error:?}"); }; assert_eq!(release, "20240909"); - assert!(bounds.contains("3.99"), "the bounds that excluded everything are named"); + assert!( + bounds.contains("3.99"), + "the bounds that excluded everything are named" + ); } #[test] @@ -128,13 +138,19 @@ fn a_bound_that_is_not_a_version_is_refused_by_name() { let error = select_from(&release(), "latest", None, LINUX).expect_err("refused"); assert!(matches!( error, - Error::InvalidVersion { bound: "minimum", .. } + Error::InvalidVersion { + bound: "minimum", + .. + } )); let error = select_from(&release(), "3.12", Some("nonsense"), LINUX).expect_err("refused"); assert!(matches!( error, - Error::InvalidVersion { bound: "maximum", .. } + Error::InvalidVersion { + bound: "maximum", + .. + } )); } @@ -159,10 +175,22 @@ fn a_release_with_no_digest_still_selects() { fn every_platform_the_channel_publishes_for_is_in_the_table() { for (os, arch, expected) in [ ("linux", "x86_64", LINUX), - ("linux", "aarch64", "aarch64-unknown-linux-gnu-install_only.tar.gz"), - ("macos", "aarch64", "aarch64-apple-darwin-install_only.tar.gz"), + ( + "linux", + "aarch64", + "aarch64-unknown-linux-gnu-install_only.tar.gz", + ), + ( + "macos", + "aarch64", + "aarch64-apple-darwin-install_only.tar.gz", + ), ("macos", "x86_64", "x86_64-apple-darwin-install_only.tar.gz"), - ("windows", "x86_64", "x86_64-pc-windows-msvc-install_only.tar.gz"), + ( + "windows", + "x86_64", + "x86_64-pc-windows-msvc-install_only.tar.gz", + ), ] { assert_eq!( suffix_for(os, arch).unwrap_or_else(|_| panic!("{os}/{arch} is missing")), @@ -179,5 +207,9 @@ fn a_host_the_channel_does_not_publish_for_is_refused_by_name() { #[test] fn this_machine_is_one_the_channel_publishes_for() { - assert!(host_suffix().is_ok(), "no build for {}", std::env::consts::ARCH); + assert!( + host_suffix().is_ok(), + "no build for {}", + std::env::consts::ARCH + ); } diff --git a/crates/tinyruntime-python/src/error/test.rs b/crates/tinyruntime-python/src/error/test.rs index cec2880..7db07e0 100644 --- a/crates/tinyruntime-python/src/error/test.rs +++ b/crates/tinyruntime-python/src/error/test.rs @@ -22,7 +22,10 @@ fn messages_are_lowercase_and_unpunctuated() { ]; for error in errors { let rendered = error.to_string(); - assert!(!rendered.ends_with('.'), "`{rendered}` ends with punctuation"); + assert!( + !rendered.ends_with('.'), + "`{rendered}` ends with punctuation" + ); let first = rendered.chars().next().expect("a non-empty message"); assert!(!first.is_uppercase(), "`{rendered}` starts with a capital"); } @@ -38,9 +41,15 @@ fn an_unreadable_index_and_an_empty_one_are_different_errors() { bounds: ">= 3.99".to_string(), } .to_string(); - assert!(unreadable.contains("could not be read"), "got `{unreadable}`"); + assert!( + unreadable.contains("could not be read"), + "got `{unreadable}`" + ); assert!(empty.contains("no build matching"), "got `{empty}`"); - assert!(empty.contains(">= 3.99"), "the bounds that excluded everything are named"); + assert!( + empty.contains(">= 3.99"), + "the bounds that excluded everything are named" + ); } #[test] diff --git a/crates/tinyruntime-python/src/harness/test.rs b/crates/tinyruntime-python/src/harness/test.rs index e40298c..3ed577a 100644 --- a/crates/tinyruntime-python/src/harness/test.rs +++ b/crates/tinyruntime-python/src/harness/test.rs @@ -28,7 +28,10 @@ fn output_is_unbuffered_by_both_the_flag_and_the_environment() { .contains(&("PYTHONUNBUFFERED".to_string(), "1".to_string())) ); assert_eq!( - harness.command_args("/cache/pool_worker.py").last().map(String::as_str), + harness + .command_args("/cache/pool_worker.py") + .last() + .map(String::as_str), Some("/cache/pool_worker.py"), "the script must come after the flags" ); @@ -55,7 +58,10 @@ fn output_is_captured_at_the_file_descriptor_level() { // Swapping `sys.stdout` would miss `os.write(1, ...)`, subprocess output, // and anything a native extension writes — all of which would then land on // whatever the real descriptor points at. - assert!(SOURCE.contains("os.dup2("), "capture is not descriptor-level"); + assert!( + SOURCE.contains("os.dup2("), + "capture is not descriptor-level" + ); assert!( SOURCE.contains("tempfile.TemporaryFile"), "a pipe would deadlock on a job that outproduces its buffer" diff --git a/crates/tinyruntime-python/src/layout/test.rs b/crates/tinyruntime-python/src/layout/test.rs index 286f6dd..327d3af 100644 --- a/crates/tinyruntime-python/src/layout/test.rs +++ b/crates/tinyruntime-python/src/layout/test.rs @@ -28,7 +28,11 @@ fn the_interpreter_is_found_inside_the_channels_python_directory() { fabricate(scratch.path(), &["python3"]); let found = find_interpreter(scratch.path()).expect("the interpreter is there"); - assert!(found.ends_with("python/bin/python3"), "found {}", found.display()); + assert!( + found.ends_with("python/bin/python3"), + "found {}", + found.display() + ); } #[cfg(unix)] diff --git a/crates/tinyruntime-python/src/system/mod.rs b/crates/tinyruntime-python/src/system/mod.rs index eb9de0b..af7431b 100644 --- a/crates/tinyruntime-python/src/system/mod.rs +++ b/crates/tinyruntime-python/src/system/mod.rs @@ -17,8 +17,8 @@ use std::time::Duration; use tinyruntime_bus::{RuntimeLayout, RuntimeSettings}; -use crate::version::{self, Version}; use crate::layout; +use crate::version::{self, Version}; /// How long a `--version` probe may take before it is abandoned. /// @@ -158,7 +158,11 @@ pub async fn probe_version(binary: &Path) -> Option { } else { stdout }; - if reported.is_empty() { None } else { Some(reported) } + if reported.is_empty() { + None + } else { + Some(reported) + } } /// Suppress the console window Windows would flash for each probe. diff --git a/crates/tinyruntime-python/src/system/test.rs b/crates/tinyruntime-python/src/system/test.rs index 90b80b5..795148b 100644 --- a/crates/tinyruntime-python/src/system/test.rs +++ b/crates/tinyruntime-python/src/system/test.rs @@ -59,7 +59,11 @@ async fn a_binary_that_does_not_understand_the_flag_is_not_an_interpreter() { #[tokio::test] async fn a_binary_that_is_not_there_is_not_probed_successfully() { - assert!(probe_version(Path::new("/nonexistent/python3")).await.is_none()); + assert!( + probe_version(Path::new("/nonexistent/python3")) + .await + .is_none() + ); } #[tokio::test] diff --git a/crates/tinyruntime-python/src/tinybus_module/mod.rs b/crates/tinyruntime-python/src/tinybus_module/mod.rs index 9fc53a1..039b38b 100644 --- a/crates/tinyruntime-python/src/tinybus_module/mod.rs +++ b/crates/tinyruntime-python/src/tinybus_module/mod.rs @@ -41,8 +41,7 @@ struct PythonProvider { impl PythonProvider { /// What this provider is and what it targets by default. async fn describe(&self) -> TinyBusResult { - let mut descriptor = - ProviderDescriptor::new(Language::python(), "Python", DEFAULT_VERSION); + let mut descriptor = ProviderDescriptor::new(Language::python(), "Python", DEFAULT_VERSION); for tool in layout::TOOLS { descriptor = descriptor.with_executable(*tool); } @@ -57,10 +56,7 @@ impl PythonProvider { } /// Pick the standalone build to install. - async fn select_distribution( - &self, - settings: RuntimeSettings, - ) -> TinyBusResult { + async fn select_distribution(&self, settings: RuntimeSettings) -> TinyBusResult { distribution::select(&self.client, &settings) .await .map_err(|error| tinybus::Error::failed(error.to_string())) diff --git a/crates/tinyruntime-python/src/tinybus_module/test.rs b/crates/tinyruntime-python/src/tinybus_module/test.rs index d5fe71a..5777729 100644 --- a/crates/tinyruntime-python/src/tinybus_module/test.rs +++ b/crates/tinyruntime-python/src/tinybus_module/test.rs @@ -1,64 +1,153 @@ -//! Tests for the `TinyBus` module adapter and its declared surface. +//! Tests for the module adapter and its declared surface. +#![allow(clippy::unwrap_used, clippy::expect_used, clippy::panic)] -use super::{GreetingService, setup}; -use template_bus::{GreetRequest, GreetResponse, names}; use tinybus::broker::Broker; use tinybus::transport::memory::MemoryBus; -use tinybus::{Connection, Interface}; +use tinybus::{Connection, Interface, Result as TinyBusResult}; + +use tinyruntime_bus::{ + CONTRACT_VERSION, Language, LayoutRequest, LayoutResponse, ProviderDescriptor, RuntimeSettings, + WorkerHarness, names, +}; + +use super::{DEFAULT_VERSION, PythonProvider, setup}; + +fn provider() -> PythonProvider { + PythonProvider { + client: reqwest::Client::new(), + } +} + +/// Start a broker, serve the provider, and return the client proxy to it. +/// +/// The module connection is returned alongside because dropping it disconnects +/// the peer, taking the well-known name with it. +async fn serving(bus: &MemoryBus) -> TinyBusResult<(Connection, tinybus::Proxy)> { + let module = Connection::connect(bus.connect().await?).await?; + setup(module.clone()).await?; + + let client = Connection::connect(bus.connect().await?).await?; + let proxy = client.proxy( + names::providers::PYTHON, + names::PROVIDER_OBJECT_PATH, + names::PROVIDER_INTERFACE, + )?; + Ok((module, proxy)) +} + +fn bus() -> MemoryBus { + let bus = MemoryBus::new(); + Broker::new().spawn(bus.clone()); + bus +} #[test] fn declared_methods_match_the_dispatch_table() { - let methods = GreetingService + let methods = provider() .members() .into_iter() .map(|member| member.to_string()) .collect::>(); - assert_eq!(methods, names::METHODS.to_vec()); + assert_eq!(methods, names::PROVIDER_METHODS.to_vec()); } #[test] -fn the_served_interface_name_matches_the_contract() { - assert_eq!(GreetingService.name().to_string(), names::INTERFACE); +fn the_served_interface_is_the_shared_provider_interface() { + // Serving anything else would make this module unroutable: the router + // addresses every provider through one interface. + assert_eq!(provider().name().to_string(), names::PROVIDER_INTERFACE); +} + +#[test] +fn the_default_floor_is_a_version() { + assert!(crate::parse_version(DEFAULT_VERSION).is_some()); } #[tokio::test] -async fn module_serves_greetings_over_a_real_bus() -> tinybus::Result<()> { - let bus = MemoryBus::new(); - Broker::new().spawn(bus.clone()); +async fn the_router_can_describe_this_provider_over_a_bus() -> TinyBusResult<()> { + let bus = bus(); + let (_module, proxy) = serving(&bus).await?; - let service = Connection::connect(bus.connect().await?).await?; - setup(service.clone()).await?; + let descriptor: ProviderDescriptor = proxy.call(names::provider_methods::DESCRIBE, ()).await?; + assert_eq!(descriptor.language, Language::python()); + assert_eq!(descriptor.display_name, "Python"); + assert_eq!( + descriptor.contract_version, CONTRACT_VERSION, + "the router refuses a provider it cannot bind to" + ); + assert!(descriptor.executables.contains(&"pip".to_string())); + Ok(()) +} - let client = Connection::connect(bus.connect().await?).await?; - let proxy = client.proxy(names::INTERFACE, names::OBJECT_PATH, names::INTERFACE)?; - let reply: GreetResponse = proxy - .call(names::methods::GREET, (GreetRequest::new("Ferris"),)) +#[tokio::test] +async fn the_harness_crosses_the_bus_intact() -> TinyBusResult<()> { + // The harness is a script the router writes out and launches; if it did not + // survive the round trip, every worker would fail at its handshake. + let bus = bus(); + let (_module, proxy) = serving(&bus).await?; + + let harness: WorkerHarness = proxy.call(names::provider_methods::HARNESS, ()).await?; + assert_eq!(harness, crate::harness()); + assert!(!harness.source.is_empty()); + Ok(()) +} + +#[tokio::test] +async fn a_directory_that_is_not_an_install_is_reported_empty_rather_than_failing() +-> TinyBusResult<()> { + // The router scans a cache full of directories that are not installs. If + // this failed instead of answering, one leftover would break every scan. + let bus = bus(); + let (_module, proxy) = serving(&bus).await?; + + let scratch = tempfile::tempdir().expect("scratch directory"); + let response: LayoutResponse = proxy + .call( + names::provider_methods::LAYOUT, + (LayoutRequest::new( + scratch.path().to_string_lossy(), + RuntimeSettings::new(DEFAULT_VERSION), + ),), + ) .await?; - assert_eq!(reply, GreetResponse::new("Hello, Ferris!")); + assert!(response.layout.is_none()); Ok(()) } #[tokio::test] -async fn module_rejects_an_empty_name_over_the_bus() -> tinybus::Result<()> { - let bus = MemoryBus::new(); - Broker::new().spawn(bus.clone()); +async fn detecting_a_host_interpreter_answers_rather_than_failing() -> TinyBusResult<()> { + // Whether this machine has Python is not the point: the call must complete + // either way, because "nothing here" is how the router learns to install. + let bus = bus(); + let (_module, proxy) = serving(&bus).await?; + + let _: LayoutResponse = proxy + .call( + names::provider_methods::DETECT_SYSTEM, + (RuntimeSettings::new(DEFAULT_VERSION),), + ) + .await?; + Ok(()) +} - let service = Connection::connect(bus.connect().await?).await?; - setup(service.clone()).await?; +#[tokio::test] +async fn a_floor_that_is_not_a_version_is_refused_with_a_readable_reason() -> TinyBusResult<()> { + let bus = bus(); + let (_module, proxy) = serving(&bus).await?; - let client = Connection::connect(bus.connect().await?).await?; - let proxy = client.proxy(names::INTERFACE, names::OBJECT_PATH, names::INTERFACE)?; let result = proxy - .call::(names::methods::GREET, (GreetRequest::new(" "),)) + .call::( + names::provider_methods::SELECT_DISTRIBUTION, + (RuntimeSettings::new("latest"),), + ) .await; let Err(error) = result else { - return Err(tinybus::Error::failed( - "whitespace-only names unexpectedly succeeded", - )); + return Err(tinybus::Error::failed("`latest` unexpectedly resolved")); }; - assert!(error.to_string().contains("name must not be empty")); + let rendered = error.to_string(); + assert!(rendered.contains("latest"), "got `{rendered}`"); Ok(()) } diff --git a/crates/tinyruntime-python/src/version/test.rs b/crates/tinyruntime-python/src/version/test.rs index 03d8e6b..87b90db 100644 --- a/crates/tinyruntime-python/src/version/test.rs +++ b/crates/tinyruntime-python/src/version/test.rs @@ -30,7 +30,11 @@ fn a_release_candidate_parses_as_its_series() { #[test] fn something_that_is_not_a_version_does_not_parse() { assert_eq!(parse_version("latest"), None); - assert_eq!(parse_version("3"), None, "a bare major is not a python version"); + assert_eq!( + parse_version("3"), + None, + "a bare major is not a python version" + ); assert_eq!(parse_version(""), None); } @@ -45,7 +49,10 @@ fn versions_order_by_component_rather_than_lexically() { #[test] fn a_request_names_a_floor_rather_than_an_exact_version() { assert!(satisfies(version("3.12.4"), "3.12", None)); - assert!(satisfies(version("3.13.1"), "3.12", None), "newer satisfies a floor"); + assert!( + satisfies(version("3.13.1"), "3.12", None), + "newer satisfies a floor" + ); assert!(!satisfies(version("3.11.9"), "3.12", None)); } diff --git a/crates/tinyruntime-python/tests/harness_protocol.rs b/crates/tinyruntime-python/tests/harness_protocol.rs new file mode 100644 index 0000000..715aa1b --- /dev/null +++ b/crates/tinyruntime-python/tests/harness_protocol.rs @@ -0,0 +1,394 @@ +//! End-to-end tests for the shipped worker harness, against a real `python`. +//! +//! The harness is the one part of this crate that is not Rust, so nothing else +//! in the suite can check that it actually speaks the protocol. These tests +//! stand in for the router: they listen on loopback, launch the harness the way +//! the router would, complete the handshake, and run jobs through it. +//! +//! They skip when the machine has no Python 3, so the suite stays hermetic on a +//! runner without one rather than failing for the wrong reason. + +#![allow(clippy::unwrap_used, clippy::expect_used, clippy::panic)] + +use std::path::PathBuf; +use std::process::Stdio; +use std::time::Duration; + +use tokio::io::{AsyncBufReadExt, AsyncWriteExt, BufReader, Lines}; +use tokio::net::{TcpListener, TcpStream}; +use tokio::process::{Child, Command}; + +use tinyruntime_python::{WORKER_PROTOCOL_VERSION, harness}; + +/// How long any single step may take before the test gives up. +const STEP_TIMEOUT: Duration = Duration::from_secs(30); + +/// Read and discard a child stream, so a job writing to it never blocks. +fn drain(stream: impl tokio::io::AsyncRead + Send + Unpin + 'static) { + tokio::spawn(async move { + let mut lines = BufReader::new(stream).lines(); + while let Ok(Some(_)) = lines.next_line().await {} + }); +} + +/// The first working Python 3 on this machine, or `None`. +async fn interpreter() -> Option { + for candidate in ["python3", "python"] { + let usable = Command::new(candidate) + .arg("--version") + .stdout(Stdio::null()) + .stderr(Stdio::null()) + .status() + .await + .is_ok_and(|status| status.success()); + if usable { + return Some(candidate.to_string()); + } + } + None +} + +/// A harness process under test, plus the protocol connection to it. +struct Harness { + _child: Child, + writer: tokio::io::WriteHalf, + lines: Lines>>, + _scratch: tempfile::TempDir, + cwd: PathBuf, +} + +impl Harness { + /// Launch the harness the way the router would, or `None` without Python. + async fn launch() -> Option { + let Some(binary) = interpreter().await else { + eprintln!("skipped: this machine has no usable python"); + return None; + }; + + let scratch = tempfile::tempdir().unwrap(); + let harness = harness(); + let script = scratch.path().join(&harness.filename); + std::fs::write(&script, &harness.source).unwrap(); + + let listener = TcpListener::bind("127.0.0.1:0").await.unwrap(); + let address = listener.local_addr().unwrap(); + let token = "test-secret-token"; + + let mut command = Command::new(binary); + command + .args(harness.command_args(&script.to_string_lossy())) + .env("TINYRUNTIME_PROTOCOL_ADDR", address.to_string()) + .env("TINYRUNTIME_PROTOCOL_TOKEN", token) + .env("PATH", std::env::var("PATH").unwrap_or_default()); + for (name, value) in &harness.env { + command.env(name, value); + } + let mut child = command + .stdin(Stdio::null()) + .stdout(Stdio::piped()) + .stderr(Stdio::piped()) + .kill_on_drop(true) + .spawn() + .unwrap(); + + let (stream, _) = tokio::time::timeout(STEP_TIMEOUT, listener.accept()) + .await + .expect("the harness connected back") + .unwrap(); + let (reader, writer) = tokio::io::split(stream); + let mut lines = BufReader::new(reader).lines(); + + let handshake: serde_json::Value = serde_json::from_str( + &tokio::time::timeout(STEP_TIMEOUT, lines.next_line()) + .await + .expect("the handshake arrived") + .unwrap() + .expect("the harness sent a handshake"), + ) + .unwrap(); + + assert_eq!(handshake["ready"], serde_json::json!(true)); + assert_eq!( + handshake["protocol"], + serde_json::json!(WORKER_PROTOCOL_VERSION) + ); + assert_eq!(handshake["language"], serde_json::json!("python")); + assert_eq!( + handshake["token"], + serde_json::json!(token), + "the harness must echo the secret it was given" + ); + + // Drain the child's own descriptors, exactly as the router does. This is + // not tidiness: a job that writes to fd 1 blocks once the pipe fills. + if let Some(stdout) = child.stdout.take() { + drain(stdout); + } + if let Some(stderr) = child.stderr.take() { + drain(stderr); + } + + let cwd = scratch.path().to_path_buf(); + Some(Self { + _child: child, + writer, + lines, + _scratch: scratch, + cwd, + }) + } + + /// Run one job and return its reply. + async fn run(&mut self, id: &str, code: &str, timeout_ms: Option) -> serde_json::Value { + let mut request = serde_json::json!({ + "id": id, + "code": code, + "cwd": self.cwd.to_string_lossy(), + }); + if let Some(timeout_ms) = timeout_ms { + request["timeout_ms"] = serde_json::json!(timeout_ms); + } + + let mut line = serde_json::to_string(&request).unwrap(); + line.push('\n'); + self.writer.write_all(line.as_bytes()).await.unwrap(); + self.writer.flush().await.unwrap(); + + let reply = tokio::time::timeout(STEP_TIMEOUT, self.lines.next_line()) + .await + .expect("the harness replied") + .unwrap() + .expect("the harness sent a reply"); + let reply: serde_json::Value = serde_json::from_str(&reply).unwrap(); + assert_eq!( + reply["id"], + serde_json::json!(id), + "reply was for another job" + ); + reply + } +} + +#[tokio::test] +async fn the_harness_runs_a_job_and_reports_its_output() { + let Some(mut harness) = Harness::launch().await else { + return; + }; + let reply = harness.run("1", "print(6 * 7)", None).await; + assert_eq!(reply["ok"], serde_json::json!(true)); + assert_eq!(reply["stdout"], serde_json::json!("42\n")); + assert_eq!(reply["exit_code"], serde_json::json!(0)); +} + +#[tokio::test] +async fn one_warm_worker_serves_many_jobs() { + // The entire reason the pool exists. If the harness exited after a job, this + // would fail on the second one. + let Some(mut harness) = Harness::launch().await else { + return; + }; + for index in 0..3 { + let reply = harness + .run(&index.to_string(), &format!("print({index} + 1)"), None) + .await; + assert_eq!( + reply["stdout"], + serde_json::json!(format!("{}\n", index + 1)) + ); + } +} + +#[tokio::test] +async fn each_job_gets_fresh_globals() { + // The only isolation a Python worker can offer. Without it, a name defined + // by one job would be visible to an unrelated later one. + let Some(mut harness) = Harness::launch().await else { + return; + }; + harness + .run("1", "leaked = 'from the first job'", None) + .await; + + let reply = harness.run("2", "print('leaked' in dir())", None).await; + assert_eq!(reply["stdout"], serde_json::json!("False\n")); +} + +#[tokio::test] +async fn a_job_that_raises_reports_a_traceback_without_killing_the_worker() { + let Some(mut harness) = Harness::launch().await else { + return; + }; + let raised = harness.run("1", "raise ValueError('boom')", None).await; + assert_eq!( + raised["ok"], + serde_json::json!(true), + "the harness ran it; the job failed" + ); + assert_eq!(raised["exit_code"], serde_json::json!(1)); + assert!(raised["stderr"].as_str().unwrap().contains("boom")); + + let after = harness.run("2", "print('still here')", None).await; + assert_eq!(after["stdout"], serde_json::json!("still here\n")); +} + +#[tokio::test] +async fn a_job_calling_sys_exit_reports_its_code_and_leaves_the_worker_running() { + // A long-lived worker must survive `sys.exit(3)`. Without the SystemExit + // arm the interpreter would exit and take every queued job with it. + let Some(mut harness) = Harness::launch().await else { + return; + }; + let exited = harness.run("1", "import sys; sys.exit(3)", None).await; + assert_eq!(exited["exit_code"], serde_json::json!(3)); + + let after = harness.run("2", "print('survived')", None).await; + assert_eq!(after["stdout"], serde_json::json!("survived\n")); +} + +#[tokio::test] +async fn output_written_past_the_python_layer_is_still_captured() { + // `os.write(1, ...)` bypasses `sys.stdout` entirely. If capture were not at + // the file-descriptor level this would land on the real descriptor instead + // of in the reply. + let Some(mut harness) = Harness::launch().await else { + return; + }; + let reply = harness + .run("1", "import os; os.write(1, b'LOW_LEVEL')", None) + .await; + assert_eq!(reply["stdout"], serde_json::json!("LOW_LEVEL")); +} + +#[tokio::test] +async fn a_subprocess_started_by_a_job_is_captured_too() { + let Some(mut harness) = Harness::launch().await else { + return; + }; + let reply = harness + .run( + "1", + "import subprocess, sys; subprocess.run([sys.executable, '-c', \"print('FROM_CHILD')\"])", + None, + ) + .await; + assert_eq!(reply["stdout"], serde_json::json!("FROM_CHILD\n")); +} + +#[tokio::test] +async fn relative_paths_resolve_against_the_job_directory() { + // A shared warm worker runs wherever the last job left it unless the harness + // enters each job's directory. Getting this wrong escapes the caller's sandbox. + let Some(mut harness) = Harness::launch().await else { + return; + }; + std::fs::write(harness.cwd.join("probe.txt"), b"RELATIVE_OK").unwrap(); + + let reply = harness + .run("1", "print(open('./probe.txt').read(), end='')", None) + .await; + assert_eq!(reply["stdout"], serde_json::json!("RELATIVE_OK")); +} + +#[tokio::test] +async fn a_job_whose_directory_is_missing_fails_rather_than_running_elsewhere() { + let Some(mut harness) = Harness::launch().await else { + return; + }; + let sentinel = harness.cwd.join("must-not-exist.txt"); + harness.cwd = harness.cwd.join("deleted-sandbox"); + + let reply = harness + .run( + "1", + "open('must-not-exist.txt', 'w').write('escaped')", + None, + ) + .await; + assert_eq!(reply["ok"], serde_json::json!(false), "the job ran anyway"); + assert!( + reply["error"] + .as_str() + .unwrap() + .contains("failed to set worker cwd") + ); + assert!(!sentinel.exists(), "the job escaped its sandbox"); +} + +#[tokio::test] +async fn the_working_directory_is_restored_between_jobs() { + // Jobs share one interpreter, so a job that changed directory and was not + // restored would silently relocate every job after it. + let Some(mut harness) = Harness::launch().await else { + return; + }; + std::fs::create_dir(harness.cwd.join("elsewhere")).unwrap(); + harness + .run("1", "import os; os.chdir('elsewhere')", None) + .await; + + std::fs::write(harness.cwd.join("probe.txt"), b"STILL_HERE").unwrap(); + let reply = harness + .run("2", "print(open('./probe.txt').read(), end='')", None) + .await; + assert_eq!(reply["stdout"], serde_json::json!("STILL_HERE")); +} + +#[cfg(unix)] +#[tokio::test] +async fn a_job_that_never_finishes_is_aborted_at_its_deadline() { + // Best effort, and only on Unix: the deadline is a SIGALRM, and there is no + // equivalent on Windows. The router's hard deadline is the backstop there. + let Some(mut harness) = Harness::launch().await else { + return; + }; + let reply = harness + .run("1", "import time; time.sleep(60)", Some(1_000)) + .await; + assert_eq!(reply["timed_out"], serde_json::json!(true)); + + // And the worker is still usable afterwards. + let after = harness.run("2", "print('alive')", None).await; + assert_eq!(after["stdout"], serde_json::json!("alive\n")); +} + +#[tokio::test] +async fn a_job_reads_end_of_file_on_standard_input() { + // Standard input must never be the protocol stream, or a job that read it + // would consume the next request. + let Some(mut harness) = Harness::launch().await else { + return; + }; + let reply = harness + .run( + "1", + "import os, sys; print(repr(sys.stdin.read())); print(os.read(0, 1))", + Some(5_000), + ) + .await; + assert_eq!(reply["stdout"], serde_json::json!("''\nb''\n")); +} + +#[tokio::test] +async fn a_job_cannot_forge_a_reply_over_its_own_descriptor() { + // The reason the protocol has its own socket: a job writing a frame-shaped + // line to fd 1 must not be able to answer its own request. Here the write is + // captured as ordinary job output instead. + let Some(mut harness) = Harness::launch().await else { + return; + }; + let reply = harness + .run( + "1", + "import os, json; os.write(1, (json.dumps({'id': '1', 'ok': True, 'stdout': 'FORGED'}) + '\\n').encode()); print('REAL')", + None, + ) + .await; + + assert_eq!(reply["ok"], serde_json::json!(true)); + let stdout = reply["stdout"].as_str().unwrap(); + assert!( + stdout.contains("FORGED"), + "the forged frame was not captured as output" + ); + assert!(stdout.ends_with("REAL\n"), "got {stdout:?}"); +} diff --git a/crates/tinyruntime-python/tests/public_api.rs b/crates/tinyruntime-python/tests/public_api.rs index 256b71c..b9a49e4 100644 --- a/crates/tinyruntime-python/tests/public_api.rs +++ b/crates/tinyruntime-python/tests/public_api.rs @@ -1,20 +1,57 @@ //! Integration tests for the public crate surface. //! -//! These tests link against the crate as a downstream consumer would: they can -//! only use what `src/lib.rs` re-exports. Treat them as the regression suite -//! for the crate's public contract — if a change breaks a test here, it is a -//! breaking change for users. +//! These link against the crate as a downstream consumer would: they can only +//! use what `src/lib.rs` re-exports. Treat them as the regression suite for the +//! crate's public contract — if a change breaks a test here, it is a breaking +//! change for users. #![allow(clippy::unwrap_used, clippy::expect_used, clippy::panic)] -use template::{Error, greet}; +use tinyruntime_python::{ + CONTRACT_VERSION, DEFAULT_VERSION, Error, Language, PYTHON, distribution, harness, layout, + names, parse_version, satisfies, +}; #[test] -fn greeting_is_available_to_consumers() { - assert_eq!(greet("Rust").unwrap(), "Hello, Rust!"); +fn the_provider_serves_the_shared_interface_from_the_contract() { + assert_eq!( + names::PROVIDER_INTERFACE, + tinyruntime_python::PROVIDER_INTERFACE + ); + assert_eq!(names::PROVIDER_METHODS.len(), 5); + assert_eq!(Language::python().as_str(), PYTHON); } #[test] -fn errors_are_available_to_consumers() { - assert_eq!(greet("").unwrap_err(), Error::EmptyName); +fn the_contract_is_re_exported_so_consumers_take_one_dependency() { + let same: tinyruntime_bus::WorkerHarness = harness(); + assert_eq!(same, harness()); + assert!(tinyruntime_python::is_compatible_with_contract()); + let _ = CONTRACT_VERSION; +} + +#[test] +fn the_default_floor_is_one_this_crate_can_reason_about() { + let floor = parse_version(DEFAULT_VERSION).expect("the default floor is a version"); + assert!(satisfies(floor, DEFAULT_VERSION, None)); +} + +#[test] +fn the_host_table_and_the_layout_agree_about_this_platform() { + // A host the channel publishes for must also be one the layout knows the + // shape of, or an install would succeed and then be unusable. + if distribution::host_suffix().is_ok() { + let scratch = tempfile::tempdir().unwrap(); + assert!( + layout::find_interpreter(scratch.path()).is_none(), + "an empty directory must not read as an install" + ); + assert!(layout::TOOLS.contains(&"python")); + } +} + +#[test] +fn an_unsupported_host_is_reported_by_name() { + let error = distribution::suffix_for("plan9", "x86_64").expect_err("no build exists"); + assert!(matches!(error, Error::UnsupportedHost { .. })); } From 9e9b77f618d3c5cce93ff0138fb73f6c5d8a9804 Mon Sep 17 00:00:00 2001 From: Steven Enamakel Date: Fri, 21 Aug 2026 19:19:09 +0300 Subject: [PATCH 11/19] chore: files changed crates/tinyruntime-python/examples/basic.rs Auto-committed-on: dragonfly Co-authored-by: Medulla --- crates/tinyruntime-python/examples/basic.rs | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-) diff --git a/crates/tinyruntime-python/examples/basic.rs b/crates/tinyruntime-python/examples/basic.rs index 5f035f3..0f91168 100644 --- a/crates/tinyruntime-python/examples/basic.rs +++ b/crates/tinyruntime-python/examples/basic.rs @@ -18,11 +18,10 @@ async fn main() -> Result<(), Box> { // A request names a floor, so anything newer satisfies it. for candidate in ["3.11.9", "3.12.4", "3.13.1"] { - let parsed = parse_version(candidate).expect("a version"); - let verdict = if satisfies(parsed, DEFAULT_VERSION, None) { - "reused" - } else { - "rejected" + let verdict = match parse_version(candidate) { + Some(parsed) if satisfies(parsed, DEFAULT_VERSION, None) => "reused", + Some(_) => "rejected", + None => "not a version", }; println!(" a host {candidate} would be {verdict}"); } From 8df85fba66b1e75f8386270665d6106c547283d1 Mon Sep 17 00:00:00 2001 From: Steven Enamakel Date: Fri, 21 Aug 2026 19:19:31 +0300 Subject: [PATCH 12/19] docs: update doc comments to reflect private module and renamed function Update cross-references in module-level documentation to match the current code structure. The `index` submodule is now private, so the doc comment in `distribution/mod.rs` refers to it as "the private `index` submodule" instead of using a public path. The error documentation for `select` now references `select_from` instead of the old `index::select` function name. In `lib.rs`, the `harness` module link is updated to use the explicit `mod@harness` syntax for correct intra-doc linking. Auto-committed-on: dragonfly Co-authored-by: Medulla --- crates/tinyruntime-python/src/distribution/mod.rs | 4 ++-- crates/tinyruntime-python/src/lib.rs | 2 +- 2 files changed, 3 insertions(+), 3 deletions(-) diff --git a/crates/tinyruntime-python/src/distribution/mod.rs b/crates/tinyruntime-python/src/distribution/mod.rs index 4cb7991..3faf202 100644 --- a/crates/tinyruntime-python/src/distribution/mod.rs +++ b/crates/tinyruntime-python/src/distribution/mod.rs @@ -6,7 +6,7 @@ //! //! First, selection is a search rather than a lookup: the index has to be read, //! filtered to this host, filtered to the requested version range, and then -//! ranked. That is what [`index`] does, and it is deliberately separable from the +//! ranked. That is what the private `index` submodule does, and it is deliberately separable from the //! network so it can be tested against a real index body. //! //! Second, every build unpacks into a directory called `python`, regardless of @@ -35,7 +35,7 @@ const RELEASES_API: &str = /// # Errors /// /// Returns [`Error::IndexUnavailable`] when the release index cannot be read, -/// and the selection errors from [`index::select`] otherwise. +/// and the selection errors from [`select_from`] otherwise. pub async fn select(client: &Client, settings: &RuntimeSettings) -> Result { let suffix = host_suffix()?; let release = fetch_release(client, settings.release_tag()).await?; diff --git a/crates/tinyruntime-python/src/lib.rs b/crates/tinyruntime-python/src/lib.rs index 61602cf..de63f85 100644 --- a/crates/tinyruntime-python/src/lib.rs +++ b/crates/tinyruntime-python/src/lib.rs @@ -16,7 +16,7 @@ //! inside the requested range, and why a stripped build wins a tie. //! - [`layout`] — that a standalone build hides its interpreter under `python/`, //! whatever version it is. -//! - [`harness`] — what a warm Python worker is, and the two things it cannot +//! - [`harness`](mod@harness) — what a warm Python worker is, and the two things it cannot //! promise that the Node one can. //! //! It downloads nothing, installs nothing, and starts no worker. Every answer it From 9e3de1e2638398d04e27a52a747c19ed0e3ba51a Mon Sep 17 00:00:00 2001 From: Steven Enamakel Date: Fri, 21 Aug 2026 19:24:29 +0300 Subject: [PATCH 13/19] docs(AGENTS.md): rewrite template instructions for tinyruntime-python Replace the generic Rust template setup checklist and two-crate split guidance with project-specific documentation for the tinyruntime-python provider. The new text describes the provider's role, its five TinyBus members, the vendored wire contract, and the key differences from Node.js that affect Python worker management. Auto-committed-on: dragonfly Co-authored-by: Medulla --- AGENTS.md | 194 +++++++++++++++++++++++++++--------------------------- 1 file changed, 98 insertions(+), 96 deletions(-) diff --git a/AGENTS.md b/AGENTS.md index ee8fdfc..7c55d92 100644 --- a/AGENTS.md +++ b/AGENTS.md @@ -4,101 +4,98 @@ This file is the single source of truth for how humans and coding agents work in this repository. `CLAUDE.md` is a symlink to this file, so every agent reads the same instructions. -When you generate a new project from this template, keep this file and adapt -the project-specific parts (crate name, module map, feature flags, commands). -Delete guidance that no longer applies rather than leaving it to rot. - -## Template Checklist - -Do this once, in a single commit, before writing feature code: - -- [ ] Rename `crates/template` and `crates/template-bus` to the project's crate - names, and update `name` in each manifest plus the `template-bus` entry in - the root `[workspace.dependencies]`. -- [ ] Set `description`, `keywords`, and `categories` in each manifest, and - `repository` in the root `[workspace.package]`. -- [ ] Rename the crate references in `README.md`, both `src/lib.rs` files, - `crates/template/examples/`, and `crates/template/tests/` (search for - `template` and `template_bus`). -- [ ] Replace the placeholder `greeting` module in both crates with the first - real feature area — payload types in the contract crate, behavior in the - module crate — keeping the `mod.rs` / `types.rs` / `test.rs` layout. -- [ ] Confirm `license` and `LICENSE` match the project's intended license. -- [ ] Update the security contact in `SECURITY.md`. -- [ ] Rename the TinyBus interface, object path, and member constants in - `crates/template-bus/src/names/`, and the matching `provides` / `methods` - declarations in `crates/template/src/tinybus_module/`, while keeping - `vendor/tinybus` pinned. -- [ ] Reset `CONTRACT_VERSION` in `crates/template-bus/src/version/` for the new - contract. -- [ ] Replace `ROADMAP.md` with the real plan, or delete it. -- [ ] Rewrite the "Project Structure" section below to describe this workspace. +`tinyruntime-python` is the Python **provider** for `tinyruntime`. It supplies +the language knowledge the router does not have, and it deliberately does none +of the work the router does — see "This is a provider, not a runtime manager" +below before adding anything that touches the network or the filesystem. ## Project Structure -This is a Rust 2024 cargo workspace rooted at a virtual `Cargo.toml`. Every -crate lives under `crates/`, one directory per package, each directory named for -the package it holds. There is no root package: the crate that ships as the -loadable module is `crates/template`, the same as any other member. +This is a Rust 2024 cargo workspace rooted at a virtual `Cargo.toml`. There is +one member: `crates/tinyruntime-python`, built as both an `rlib` and the +`cdylib` TinyBus loads. ```text Cargo.toml # virtual workspace: members, [workspace.package], # [workspace.dependencies], [workspace.lints] crates/ -├── template-bus/ # the wire contract: what crosses the bus, nothing else -│ ├── README.md # why the contract is its own crate -│ └── src/ -│ ├── lib.rs # crate docs + the entire public re-export surface -│ ├── names/ # interface, object path, one constant per member -│ ├── version/ # contract version and the host bind rule -│ └── / # one directory per payload family -└── template/ # the module: behavior, adapter, and the cdylib +└── tinyruntime-python/ ├── src/ - │ ├── lib.rs # crate docs + public surface, re-exporting the contract - │ ├── error/mod.rs # crate-wide `Error` and `Result` - │ ├── tinybus_module/ # TinyBus interface, ABI exports, integration tests - │ └── / # one directory per feature area - │ ├── mod.rs # module docs, wiring, smallest useful public API - │ ├── types.rs # substantial type definitions - │ └── test.rs # module-local unit tests - ├── tests/ # integration tests against the public API only - └── examples/ # runnable, compiled-in-CI usage examples -vendor/tinybus/ # pinned TinyBus host types and module SDK + │ ├── lib.rs # crate docs + public surface + │ ├── error/ # crate-wide `Error` and `Result` + │ ├── version/ # floors, ceilings, and how Python spells versions + │ ├── system/ # finding an interpreter the host already has + │ ├── distribution/ # searching the standalone release index + │ │ ├── host.rs # the host-triple table + │ │ └── index.rs # index shape and selection, testable offline + │ ├── layout/ # where an install keeps its interpreter + │ ├── harness/ # the warm-worker harness + │ │ └── pool_worker.py + │ └── tinybus_module/ # TinyBus interface, ABI exports, integration tests + ├── tests/ # integration tests, including the harness suite + └── examples/ # runnable, compiled-in-CI usage examples +vendor/tinybus/ # pinned TinyBus host types and module SDK +vendor/tinyruntime/ # pinned wire contract (`tinyruntime-bus`) docs/ -├── specs/ # behavior and architecture specifications -├── plans/ # test-first implementation plans -└── adr/ # immutable architecture decision records +├── specs/ # behaviour and architecture specifications +├── plans/ # test-first implementation plans +└── adr/ # immutable architecture decision records ``` -### The two-crate split - -`crates/template-bus` holds every type that crosses the bus and the names of the -members that carry them. It has no transport, no runtime, and no behavior, and -CI asserts it stays that way. A host that only makes calls depends on it alone. - -`crates/template` depends on it and re-exports all of it, so -`template::GreetRequest` and `template_bus::GreetRequest` are the *same* type -rather than structural twins. That direction is load-bearing: a parallel set of -payload types for hosts would mean a conversion at every call site that nothing -checks. - -The rule for deciding where something goes: a payload type describes what a -frame carries and belongs in the contract; anything that answers a frame, holds -a connection, or touches an engine belongs in the module crate. - -Add a crate by creating `crates//` — `members = ["crates/*"]` picks it up -by existing. Inherit `version`, `edition`, `rust-version`, `license`, and -`repository` from `[workspace.package]`, take shared dependencies from -`[workspace.dependencies]`, and opt into the shared lint set with: - -```toml -[lints] -workspace = true -``` - -Each feature area belongs in a focused module directory under a crate's `src/`. -A module root explains the module, wires its pieces together, and exposes the -smallest useful API. Move substantial type definitions into `types.rs` and put +### This is a provider, not a runtime manager + +`tinyruntime` — the router, in its own repository — owns everything that is the +same for every language: downloading an archive, verifying its digest, unpacking +it, promoting it into a cache atomically, reusing it on the next start, and +keeping a bounded set of warm interpreter processes in front of it. + +This repository answers five questions about Python and nothing else: + +| Member | What it answers | +| --- | --- | +| `Describe` | what this provider is and what it targets by default | +| `DetectSystem` | whether the host already has a usable interpreter | +| `SelectDistribution` | which standalone build to install for this machine | +| `Layout` | where the interpreter is inside an unpacked install | +| `Harness` | what a warm Python worker is | + +**This module downloads nothing, installs nothing, and starts no worker.** The +one network call it is allowed to make is reading the release index, so the +distribution it names carries the digest the router verifies against. A change +that fetches an archive, writes to a cache, or spawns a worker here is a change +that belongs in the router instead. + +The contract lives in `vendor/tinyruntime/crates/tinyruntime-bus`, vendored so +the router and every provider share one definition of these types. Do not define +a local copy of a payload type: a parallel set would mean a conversion at every +call site that nothing checks. + +### Two things Python does that Node.js does not + +**A request names a version floor, not an exact version.** The standalone +channel publishes a moving set of builds rather than one archive per version, so +an exact pin would stop resolving the moment that build rotated out. Selection +is therefore a search — filter to this host, filter to the range, then rank — and +that search must stay testable without a network. + +**A pooled job cannot be isolated.** There is no worker thread to run it in and +no safe way to kill one, so jobs on a warm worker share module state, +`os.environ`, and logging configuration. The harness gives each job fresh globals +and captures output at the file-descriptor level; the router recycles workers +after a job budget. That bounds the leakage without eliminating it, which is why +a host opts into Python pooling rather than getting it by default. Do not +document or assume isolation this harness cannot provide. + +### The wire contract + +`vendor/tinyruntime` is registered as a git submodule and pinned by its gitlink. +Do not edit vendored code from this repository. Make contract changes in the +`tinyruntime` repository, push them there, then update this repository's gitlink +in a separate commit. + +Each feature area belongs in a focused module directory under `src/`. A module +root explains the module, wires its pieces together, and exposes the smallest +useful API. Move substantial type definitions into `types.rs` and put module-local unit tests in a dedicated `test.rs`, wired from the bottom of the module root with: @@ -109,13 +106,11 @@ mod test; Do not accumulate inline `mod tests` blocks in implementation files, and do not let a general-purpose `utils.rs` or `helpers.rs` grow — those are a symptom of a -missing module. Prefer many small modules that each do one thing well over few -broad ones. +missing module. -Keep public exports centralized in each crate's `src/lib.rs` so downstream users -have one predictable surface. Put shared error variants in -`crates/template/src/error/mod.rs` and return the crate-wide `Result` from -fallible public APIs. +Keep public exports centralized in `src/lib.rs` so downstream users have one +predictable surface. Put shared error variants in `src/error/mod.rs` and return +the crate-wide `Result` from fallible public APIs. ## Build And Test @@ -133,8 +128,9 @@ Supporting commands: - `cargo fmt --all` — format before committing. - `cargo test ` — run a focused subset while iterating. -- `cargo test -p template-bus` — run one crate's suite. -- `cargo run -p template --example basic` — run the bundled example. +- `cargo test --test harness_protocol` — run the harness suite against a real + `python`. It skips when the machine has none. +- `cargo run -p tinyruntime-python --example basic` — run the bundled example. - `cargo doc --no-deps --all-features` — build the rustdoc CI also builds with `RUSTDOCFLAGS="-D warnings"`. - `cargo test --doc` — run doctests alone when editing documentation examples. @@ -185,8 +181,6 @@ add one: - gate anything optional behind a Cargo feature, documented in `Cargo.toml`; - declare it once in the root `[workspace.dependencies]` when more than one crate needs it, and take it with `{ workspace = true }`; -- never add one to `crates/template-bus` that pulls in a transport, an async - runtime, an HTTP client, or a native library — CI fails the build if you do; - leave a comment above the entry explaining *why* the crate is needed and what uses it — see the existing entries for the expected tone; - prefer well-maintained crates with a compatible license. @@ -211,8 +205,16 @@ new module capability requires more. ## Testing -- Module-local unit tests live in `crates//src//test.rs` and may - touch private items. +- Module-local unit tests live in `src//test.rs` and may touch private + items. +- The harness is the one part of this crate that is not Rust, so + `tests/harness_protocol.rs` stands in for the router: it listens on loopback, + launches the harness the way the router would, completes the handshake, and + runs jobs through it. Any change to `pool_worker.py` needs a test there — + especially anything touching descriptor capture or the working directory. +- Distribution selection is testable without a network, and must stay that way. + `src/distribution/index.rs` holds the shape and the ranking; test it against a + realistic index body including the assets that must be ignored. - Integration tests live in `crates//tests/` and exercise only the public API — they are the regression suite for the crate's contract. - Payload types pin their serde representation in a unit test. That @@ -295,7 +297,7 @@ Releases run from `.github/workflows/release.yml` via a manual an interrupted release after its version commit and tag exist. The workflow re-runs the full validation suite, computes the next version, updates the root `[workspace.package]` version and `Cargo.lock`, commits and tags -`vX.Y.Z`, builds `crates/template` as a TinyBus module for every supported +`vX.Y.Z`, builds `crates/tinyruntime-python` as a TinyBus module for every supported platform, pushes, and creates an immutable GitHub release with installable native packages. From a840077d6fab2959bbe07e5922d89eb8fac45b21 Mon Sep 17 00:00:00 2001 From: Steven Enamakel Date: Fri, 21 Aug 2026 19:25:14 +0300 Subject: [PATCH 14/19] docs(module): replace template documentation with tinyruntime-python content Update MODULE.md, README.md, and ROADMAP.md to describe the Python provider for tinyruntime instead of the Rust module template. The module now answers five provider questions about Python and does not perform installation or execution itself. Auto-committed-on: dragonfly Co-authored-by: Medulla --- MODULE.md | 55 +++++++++++--- README.md | 213 +++++++++++++++++++---------------------------------- ROADMAP.md | 42 +++++++---- 3 files changed, 145 insertions(+), 165 deletions(-) diff --git a/MODULE.md b/MODULE.md index 651906e..525a775 100644 --- a/MODULE.md +++ b/MODULE.md @@ -1,15 +1,48 @@ -# Template TinyBus Module +# tinyruntime-python TinyBus Module -This package contains the native `template` module for TinyBus module ABI -v1. Install only the archive matching the host operating system and +This package contains the native `tinyruntime-python` module for TinyBus module +ABI v1. Install only the archive matching the host operating system and architecture. -The module claims `ai.tinyhumans.template.Greeting`, serves the object at -`/ai/tinyhumans/template/Greeting`, and provides the `Greet` method. The -method accepts a `GreetRequest` and returns a `GreetResponse` carrying -`Hello, !`; empty names are rejected. Both payload types, the interface -name, the object path, and the member names are published as the `template-bus` -crate, so a host names them from a library rather than by string literal. +The module claims `ai.tinyhumans.runtime.python.Provider`, serves the shared +provider interface `ai.tinyhumans.runtime.Provider` at +`/ai/tinyhumans/runtime/Provider`, and provides `Describe`, `DetectSystem`, +`SelectDistribution`, `Layout`, and `Harness`. Every payload type and every name +is published as the `tinyruntime-bus` crate, so a host names them from a library +rather than by string literal. + +## It is not useful on its own + +This is a provider. It answers questions about Python and performs no +installation or execution of its own. Load it alongside the `tinyruntime` +module, which routes the `python` language to the bus name above. + +Load order does not matter: the router contacts providers per call, not at +setup, so this module may be loaded before or after it. + +## Configuration + +None. The module takes no configuration — everything it needs arrives with each +request, so a host that changes a version floor or a cache directory does not +reload anything. + +## What it does to the machine + +Nothing persistent. It runs ` --version` to probe candidates, and +it reads the `astral-sh/python-build-standalone` release index when the router +asks which build to install. It writes no files and starts no long-lived process. + +## A note on pooled execution + +The warm-worker harness this module supplies cannot isolate a job the way the +JavaScript one can: CPython offers no safe way to terminate a running thread. On +a warm worker, jobs share module state, `os.environ`, and logging configuration. +Each job does get fresh globals, its output is captured at the file-descriptor +level, and the router recycles workers after a job budget — but a host that needs +strict isolation between Python jobs should leave pooling off and accept a +short-lived interpreter per execution. + +## Installing The archive contains one `.so`, `.dylib`, or `.dll` plus `modules.toml`. Keep those files together when copying them into a TinyBus module directory. The @@ -22,8 +55,8 @@ archive. Install directly from a tagged release with: ```sh tinybus modules load-github \ - https://github.com/tinyhumansai/rust-template/releases/tag/v0.1.5 \ - template-0.1.5-ubuntu-24.04-x86_64.tar.gz \ + https://github.com/tinyhumansai/tinyruntime-python/releases/tag/v0.1.0 \ + tinyruntime-python-0.1.0-ubuntu-24.04-x86_64.tar.gz \ ``` diff --git a/README.md b/README.md index 67a4e39..064611e 100644 --- a/README.md +++ b/README.md @@ -1,156 +1,93 @@ -# Rust Template - -A production-ready Rust 2024 TinyBus module template used by TinyHumans AI. It -ships the workspace layout, TinyBus ABI adapter, error handling, testing, -documentation, CI, and multi-platform release workflow that every new -integration in this organization starts from. - -It is a two-crate cargo workspace. `crates/template-bus` is the wire contract — -member names, payload types, and the contract version, with no transport and no -behavior — and `crates/template` is the implementation, built as both an `rlib` -and the `cdylib` TinyBus loads. A host that only makes calls depends on the -contract crate alone and compiles neither the module nor `tinybus` itself. - -## Use This Template - -Choose **Use this template** on GitHub, create a repository, then work through -the checklist at the top of [`AGENTS.md`](AGENTS.md): - -- rename the `crates/template` and `crates/template-bus` directories and the - `name` fields in their manifests, and set the shared `description`, - `repository`, `keywords`, and `categories`; -- update this README and the crate documentation in `crates/template/src/lib.rs`; -- replace the placeholder `greeting` module with the first real feature area, in - both crates: the payload types in the contract, the behavior in the module; -- rename the TinyBus interface, object path, and member constants in - `crates/template-bus/src/names/`, and the matching `provides` / `methods` - declarations in `crates/template/src/tinybus_module/`; -- update the security contact and repository links in the community files; -- replace `ROADMAP.md` with the real plan, or delete it; -- change the license if GPL-3.0-only is not appropriate. - -Search for `template` and `template_bus` to find every remaining -template-specific value. - -## What You Get - -| Area | What is configured | -| --- | --- | -| Layout | A cargo workspace under `crates/`, split into a dependency-light wire contract and the module that implements it; directory modules with `mod.rs` / `types.rs` / `test.rs`, a crate-wide error type, integration tests, and a runnable example | -| Lints | `unsafe_code` forbidden, `missing_docs`, clippy `all` + `pedantic`, no `unwrap`/`expect`/`panic`/`todo` in library code — all declared once in `[workspace.lints]` so every crate, local run, and CI run agree | -| CI | Format, clippy, build, test (default and all features), a run of the bundled example, an assertion that the contract crate stays transport-free, at least 90% line coverage in every source file, rustdoc with `-D warnings`, an MSRV build, and a `cargo-deny` supply-chain check | -| Release | Manual `workflow_dispatch` bump that validates, versions, tags, and creates installable native module packages for every supported platform | -| Community | Issue and pull request templates, Dependabot, contributing, security, support, and code of conduct docs | -| Agents | [`AGENTS.md`](AGENTS.md) as the single source of truth, symlinked as `CLAUDE.md`, plus a `.claude/settings.json` allowlist for the standard commands | -| Vendor | TinyBus host types and module SDK pinned as the `vendor/tinybus` build-time submodule | - -## Layout - -```text -Cargo.toml # virtual workspace: members, shared metadata, lints -crates/ -├── template-bus/ # the wire contract — what crosses the bus -│ ├── README.md # why the contract is its own crate -│ └── src/ -│ ├── lib.rs # crate docs + the entire public re-export surface -│ ├── names/ # interface, object path, one constant per member -│ ├── greeting/ # payload types, one directory per family -│ │ ├── mod.rs -│ │ ├── types.rs -│ │ └── test.rs -│ └── version/ # contract version and the host bind rule -└── template/ # the module — behavior, adapter, and the cdylib - ├── src/ - │ ├── lib.rs # crate docs + public surface, re-exporting the contract - │ ├── error/ # crate-wide `Error` and `Result` - │ ├── greeting/ # one directory per feature area - │ └── tinybus_module/ # bus interface, setup, and ABI v1 exports - ├── tests/ - │ └── public_api.rs # integration tests against the public API only - └── examples/ - ├── basic.rs # ordinary library API usage - ├── verify_module.rs # local dynamic-module verification - └── verify_github_release.rs # tagged-release download and bus call -vendor/ -└── tinybus/ # pinned TinyBus git submodule -docs/ -├── README.md # documentation index and conventions -├── specs/ # behavior and architecture specifications -├── plans/ # implementation-ordered delivery plans -└── adr/ # immutable architecture decision records -``` +# tinyruntime-python -The split is the point. A payload type describes what a frame carries; the -behavior that answers it is a different obligation. `template` depends on -`template-bus` and re-exports all of it, so `template::GreetRequest` and -`template_bus::GreetRequest` are the *same* type rather than structural twins, -and a host is never forced to choose between linking the whole module and -redefining the vocabulary. See -[`crates/template-bus/README.md`](crates/template-bus/README.md). +The Python provider for [`tinyruntime`](https://github.com/tinyhumansai/tinyruntime). -Within each crate, feature areas use directory modules: implementation and -exports live in `mod.rs`, substantial types move to `types.rs`, and unit tests -live in `test.rs`. [`AGENTS.md`](AGENTS.md) holds the complete repository -guidance, and `CLAUDE.md` is a symlink to it so every coding agent reads one -source of truth. +## What this is -## Development +One half of a deliberate split. -Clone with submodules, or initialize them before building: +`tinyruntime` — the router — owns everything that is the same for every +language: downloading an archive, verifying its digest, unpacking it, promoting +it into a cache atomically, reusing it on the next start, and keeping a bounded +set of warm interpreter processes in front of it. -```sh -git submodule update --init --recursive +This module owns everything that is true only of Python. It answers five +questions and does nothing else: + +| Member | What it answers | +| --- | --- | +| `Describe` | what this provider is and what it targets by default | +| `DetectSystem` | whether the host already has a usable interpreter | +| `SelectDistribution` | which standalone build to install for this machine | +| `Layout` | where the interpreter is inside an unpacked install | +| `Harness` | what a warm Python worker is | + +It downloads nothing, installs nothing, and starts no worker. Every answer it +gives is a description the router acts on. + +## The Python knowledge, in four parts + +**A request names a floor, not a version.** `3.12` means "3.12 or newer". That +follows from the channel: `astral-sh/python-build-standalone` publishes a moving +set of builds rather than one archive per version, so an exact pin would stop +resolving the moment that build rotated out. A caller that needs to stay off a +newer series sets an exclusive ceiling — which is what keeps selection away from +a 3.15 release candidate sitting in the same index as the 3.12 builds it wants. + +**`python3.12` is tried before `python3`.** On a machine with several +interpreters installed, `python3` is whatever the distribution decided, and it is +often older than the versioned binary sitting right next to it. + +**Every build unpacks into a directory called `python`.** Whatever the version. +So the install directory in the cache is named from the asset rather than from +the archive's contents — otherwise every version would claim the same directory +and each install would silently replace the last. + +**A pooled job cannot be isolated, and the module says so.** There is no worker +thread to run it in and no safe way to kill one, so jobs on a warm worker share +module state, `os.environ`, and logging configuration. The harness gives each job +fresh globals, captures output at the file-descriptor level — so `os.write(1, +...)`, subprocesses, and native extensions are captured too — and enforces a soft +deadline with `SIGALRM` on Unix. The router recycles workers after a job budget, +which bounds the leakage without eliminating it. That is why a host opts into +Python pooling rather than getting it by default. + +## Using it + +Load it alongside `tinyruntime`, which routes `python` to the well-known name +this module claims (`ai.tinyhumans.runtime.python.Provider`). A host then asks +the router to run Python and never addresses this module directly. + +```rust +use tinyruntime_python::{DEFAULT_VERSION, parse_version, satisfies}; + +let installed = parse_version("Python 3.13.1").expect("a version"); +assert!(satisfies(installed, DEFAULT_VERSION, None)); +assert!(!satisfies(installed, DEFAULT_VERSION, Some("3.13"))); ``` +## Supported hosts + +Whatever the standalone channel publishes: macOS, Linux, and Windows on x86-64 +and ARM64. Anything else is refused by name rather than guessed at. + +## Building + ```sh +git submodule update --init --recursive cargo fmt --all -- --check cargo clippy --all-targets --all-features -- -D warnings cargo build --all-targets --all-features cargo test --all-features -cargo run -p template --example basic -cargo build -p template --release --lib # produces the installable cdylib ``` -Those four checks are exactly what CI runs. Optional extras: - -```sh -cargo doc --no-deps --all-features # CI builds this with RUSTDOCFLAGS="-D warnings" -cargo deny check all # supply-chain check; see deny.toml -cargo install cargo-llvm-cov # once, before running the coverage gate -.github/scripts/check-file-coverage.sh 90 coverage.json -``` +The harness suite in `tests/harness_protocol.rs` launches a real `python` and +drives the protocol end to end. It skips when the machine has none, so the suite +stays hermetic on a runner without Python. -## Releasing - -Run the **Release** workflow from the Actions tab with a `patch`, `minor`, or -`major` bump. Use `current` only to resume an interrupted release whose version -commit and tag already exist. The workflow revalidates the workspace, versions -and tags it — one `[workspace.package]` version that every member inherits — -builds `crates/template` as a TinyBus `cdylib`, and creates a GitHub release. -Assets follow `template--.` and contain the -native module, its SHA-256 `modules.toml`, license, and -[`MODULE.md`](MODULE.md). Every release also publishes `checksum.toml`, which -TinyBus uses to verify an archive before extraction. The workflow loads the -published Ubuntu archive through TinyBus's GitHub release API and calls its -`Greet` method before declaring the release successful. TinyBus itself is not -shipped by this repository; the pinned submodule is the build-time SDK. The stable native -matrix covers Ubuntu 22.04 and 24.04 on x86_64 and ARM64; Fedora 43 and 44 on -x86_64 and ARM64; rolling Arch Linux on its officially supported x86_64 -architecture; macOS 15 and 26 on Intel and Apple Silicon; Windows Server 2022 -and 2025 on x86_64; and Windows 11 on ARM64. Preview, deprecated, and unofficial -architecture images are not release gates. Do not hand-edit the version in the -root `Cargo.toml`. - -## Documentation - -- [`AGENTS.md`](AGENTS.md) — repository guidelines for humans and agents -- [`CONTRIBUTING.md`](CONTRIBUTING.md) — how to propose a change -- [`docs/specs/`](docs/specs/README.md) — behavior and architecture specs -- [`docs/plans/`](docs/plans/README.md) — test-first implementation plans -- [`docs/adr/`](docs/adr/0001-record-architecture-decisions.md) — architecture - decision records -- [`SECURITY.md`](SECURITY.md) — how to report a vulnerability +See [`AGENTS.md`](AGENTS.md) for the working agreement, and +[`MODULE.md`](MODULE.md) for installing a release artifact. ## License -GPL-3.0-only. See [LICENSE](LICENSE). +GPL-3.0-only. See [`LICENSE`](LICENSE). diff --git a/ROADMAP.md b/ROADMAP.md index 1134024..ed4e1e1 100644 --- a/ROADMAP.md +++ b/ROADMAP.md @@ -1,26 +1,36 @@ # Roadmap -Replace this file with the real plan for the crate generated from this -template, or delete it if the project does not need a public roadmap. - -Keep it short and honest: what exists, what is next, and what is deliberately -out of scope. A roadmap that lists everything is a roadmap nobody trusts. +What is deliberately not built yet, and what would have to be true before it is. ## Shipped -- module layout, crate-wide error type, and the public re-export surface -- lint configuration in `[lints]`, enforced identically locally and in CI -- CI: format, clippy, build, test, per-file coverage, rustdoc, MSRV, and - supply-chain checks -- a manual release workflow that versions, tags, publishes to crates.io, and - creates a GitHub release with crate and TinyBus runtime/module assets +- Host interpreter detection, series-specific candidates first, bounded so a + wedged binary costs a probe rather than a hang. +- Standalone build selection: filtered to this host and to the requested range, + newest first, stripped builds preferred, tested without a network. +- Install layout, including the `python/` wrapper directory every build ships. +- The warm-worker harness: fresh globals per job, descriptor-level capture, + `SIGALRM` soft deadlines, and a protocol a job cannot forge. ## Next -- the first real feature area, replacing the placeholder `greeting` module -- module-level `README.md` and `docs/spec/` entries as modules grow +**Package installation.** `pip` is reported in the layout but nothing calls it. +Whether installing dependencies belongs behind a provider member or stays a host +concern is an open question in the contract, not here. + +**Virtual environments.** A host that wants isolated dependencies per workload +currently builds that itself. The layout has everything needed to create one; the +question is whose job it is. + +**Free-threaded builds.** The channel publishes `freethreaded` variants. They +would change the isolation story for pooled jobs considerably, which makes them +interesting — and makes them something to adopt deliberately rather than by +having selection pick one up. + +## Not planned -## Out Of Scope +**Downloading or installing anything here.** That is the router's half, and +duplicating it would give every language its own subtly different pipeline. -- anything that cannot be tested deterministically -- convenience wrappers that hide the crate's error taxonomy from callers +**Claiming isolation the harness cannot provide.** CPython cannot safely kill a +running thread. The honest position — bounded leakage, opt-in pooling — stays. From 66ff5fc1d22654fe0e632075872bd15dae8cf39a Mon Sep 17 00:00:00 2001 From: Steven Enamakel Date: Fri, 21 Aug 2026 19:25:24 +0300 Subject: [PATCH 15/19] chore(vendor): add tinyruntime submodule Add the tinyruntime submodule to the vendor directory, pinning it to commit 8106f3c to include the runtime dependency for the project. Auto-committed-on: dragonfly Co-authored-by: Medulla --- vendor/tinyruntime | 1 + 1 file changed, 1 insertion(+) create mode 160000 vendor/tinyruntime diff --git a/vendor/tinyruntime b/vendor/tinyruntime new file mode 160000 index 0000000..8106f3c --- /dev/null +++ b/vendor/tinyruntime @@ -0,0 +1 @@ +Subproject commit 8106f3cad029a1d3a1d22869f00859e7d33c2fb3 From 43bfa711fbbfab9225f0c6df8f18beab13c7813b Mon Sep 17 00:00:00 2001 From: Steven Enamakel Date: Fri, 21 Aug 2026 20:03:33 +0300 Subject: [PATCH 16/19] Serve each provider at its own derived object path tinybus_module! builds a module manifest object path from its bus name, so providers sharing one path would ship manifests disagreeing with the objects they export. Each provider now serves at the path derived from its own bus name, and the router derives the same path when routing. Co-authored-by: Medulla --- .github/workflows/ci.yml | 29 ++++++++++--------- .github/workflows/release.yml | 15 +++++----- MODULE.md | 4 +-- .../examples/verify_github_release.rs | 2 +- .../examples/verify_module.rs | 2 +- crates/tinyruntime-python/src/lib.rs | 4 +-- .../src/tinybus_module/mod.rs | 11 ++++--- .../src/tinybus_module/test.rs | 13 ++++++++- crates/tinyruntime-python/tests/public_api.rs | 4 +++ vendor/tinyruntime | 2 +- 10 files changed, 52 insertions(+), 34 deletions(-) diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml index ba8c2fc..165ffdc 100644 --- a/.github/workflows/ci.yml +++ b/.github/workflows/ci.yml @@ -54,27 +54,28 @@ jobs: run: cargo test # `cargo build --all-targets` only *compiles* an example. `AGENTS.md` - # promises `cargo run -p template --example basic` works, and a compiled + # promises `cargo run -p tinyruntime-python --example basic` works, and a compiled # example can still fail on its first line. - name: Run the bundled example - run: cargo run -p template --example basic - - # `crates/template-bus` exists so a host can name the payload types - # without compiling the module. That promise is invisible in a diff, - # because a forbidden dependency arrives transitively through a feature - # someone enabled one crate away — so it is asserted rather than - # documented. + run: cargo run -p tinyruntime-python --example basic + + # The wire contract is vendored, not defined here, but this crate is one + # of the things that keeps it honest: a provider is exactly the kind of + # consumer that would be tempted to add a transport to it. The promise is + # invisible in a diff, because a forbidden dependency arrives transitively + # through a feature someone enabled one crate away — so it is asserted + # rather than documented. # - # The FORWARD form is required. `cargo tree -i -p template-bus` + # The FORWARD form is required. `cargo tree -i -p tinyruntime-bus` # discards the `-p` scope, prints the whole-workspace inverse tree, and - # exits 0 looking clean even when this crate is the one at fault. - - name: Assert the contract crate stays transport-free + # exits 0 looking clean even when the contract is the one at fault. + - name: Assert the vendored contract stays transport-free run: | set -euo pipefail - forbidden="$(cargo tree -p template-bus -e normal,build --prefix none \ + forbidden="$(cargo tree -p tinyruntime-bus -e normal,build --prefix none \ | grep -Ei 'tinybus|tokio|reqwest|ureq|hyper|rusqlite|git2' || true)" if [ -n "$forbidden" ]; then - echo "template-bus pulled in a dependency its manifest forbids:" >&2 + echo "tinyruntime-bus pulled in a dependency its manifest forbids:" >&2 echo "$forbidden" >&2 echo >&2 echo "The contract is what a host compiles against. It must stay free" >&2 @@ -128,7 +129,7 @@ jobs: run: | set -euo pipefail msrv="$(cargo metadata --format-version 1 --no-deps \ - | jq -r '.packages[] | select(.name == "template") | .rust_version')" + | jq -r '.packages[] | select(.name == "tinyruntime-python") | .rust_version')" if [[ -z "$msrv" || "$msrv" == "null" ]]; then echo "workspace.package.rust-version is not set in Cargo.toml" >&2 exit 1 diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml index 4acf379..d75881a 100644 --- a/.github/workflows/release.yml +++ b/.github/workflows/release.yml @@ -22,9 +22,8 @@ permissions: env: # The workspace member that ships as the loadable module. Its package name is - # the artifact name and the library name; `crates/template-bus` rides along on - # the same inherited version and is not packaged separately. - RELEASE_PACKAGE: template + # the artifact name and the library name. + RELEASE_PACKAGE: tinyruntime-python jobs: prepare: @@ -259,7 +258,7 @@ jobs: macOS) module="target/release/lib${library_name}.dylib" ;; *) echo "unsupported Unix runner: ${RUNNER_OS}" >&2; exit 1 ;; esac - cargo run --locked --package template --example verify_module -- "$module" + cargo run --locked --package tinyruntime-python --example verify_module -- "$module" - name: Verify Windows module through TinyBus loader if: ${{ runner.os == 'Windows' }} @@ -270,7 +269,7 @@ jobs: $ErrorActionPreference = 'Stop' $libraryName = $env:CRATE_NAME.Replace('-', '_') $module = "target/release/$libraryName.dll" - $verifyRoot = Join-Path $env:RUNNER_TEMP 'template-module-verify' + $verifyRoot = Join-Path $env:RUNNER_TEMP 'tinyruntime-python-module-verify' New-Item -ItemType Directory -Force $verifyRoot | Out-Null $identity = [System.Security.Principal.WindowsIdentity]::GetCurrent() @@ -300,7 +299,7 @@ jobs: $verifiedModule = Join-Path $verifyRoot "$libraryName.dll" Copy-Item -LiteralPath $module -Destination $verifiedModule - cargo run --locked --package template --example verify_module -- $verifiedModule + cargo run --locked --package tinyruntime-python --example verify_module -- $verifiedModule - name: Assemble Unix module package if: ${{ runner.os != 'Windows' }} @@ -463,7 +462,7 @@ jobs: verify_root="/opt/${CRATE_NAME}-module-verify" install -d -m 700 "$verify_root" install -m 755 "target/release/lib${library_name}.so" "$verify_root/" - cargo run --locked --package template --example verify_module -- \ + cargo run --locked --package tinyruntime-python --example verify_module -- \ "$verify_root/lib${library_name}.so" - name: Assemble distribution module package @@ -587,5 +586,5 @@ jobs: cargo run --manifest-path vendor/tinybus/Cargo.toml --locked \ --package tinybus --all-features --example github_module_host -- \ "$release_url" "$archive" "$sha256" - cargo run --locked --package template --example verify_github_release -- \ + cargo run --locked --package tinyruntime-python --example verify_github_release -- \ "$release_url" "$archive" "$sha256" diff --git a/MODULE.md b/MODULE.md index 525a775..2590abc 100644 --- a/MODULE.md +++ b/MODULE.md @@ -4,9 +4,9 @@ This package contains the native `tinyruntime-python` module for TinyBus module ABI v1. Install only the archive matching the host operating system and architecture. -The module claims `ai.tinyhumans.runtime.python.Provider`, serves the shared +The module claims `ai.tinyhumans.runtime.python.Provider`, implements the shared provider interface `ai.tinyhumans.runtime.Provider` at -`/ai/tinyhumans/runtime/Provider`, and provides `Describe`, `DetectSystem`, +`/ai/tinyhumans/runtime/python/Provider`, and provides `Describe`, `DetectSystem`, `SelectDistribution`, `Layout`, and `Harness`. Every payload type and every name is published as the `tinyruntime-bus` crate, so a host names them from a library rather than by string literal. diff --git a/crates/tinyruntime-python/examples/verify_github_release.rs b/crates/tinyruntime-python/examples/verify_github_release.rs index 30cf8a7..fcb3f4e 100644 --- a/crates/tinyruntime-python/examples/verify_github_release.rs +++ b/crates/tinyruntime-python/examples/verify_github_release.rs @@ -61,7 +61,7 @@ async fn main() -> Result<(), Box> { // it verifies the artifact rather than the machine it happens to run on. let proxy = client.proxy( names::providers::PYTHON, - names::PROVIDER_OBJECT_PATH, + names::providers::PYTHON_OBJECT_PATH, names::PROVIDER_INTERFACE, )?; let descriptor: ProviderDescriptor = proxy.call(names::provider_methods::DESCRIBE, ()).await?; diff --git a/crates/tinyruntime-python/examples/verify_module.rs b/crates/tinyruntime-python/examples/verify_module.rs index 6efb99f..6521771 100644 --- a/crates/tinyruntime-python/examples/verify_module.rs +++ b/crates/tinyruntime-python/examples/verify_module.rs @@ -48,7 +48,7 @@ async fn main() -> Result<(), Box> { // it verifies the artifact rather than the machine it happens to run on. let proxy = client.proxy( names::providers::PYTHON, - names::PROVIDER_OBJECT_PATH, + names::providers::PYTHON_OBJECT_PATH, names::PROVIDER_INTERFACE, )?; let descriptor: ProviderDescriptor = proxy.call(names::provider_methods::DESCRIBE, ()).await?; diff --git a/crates/tinyruntime-python/src/lib.rs b/crates/tinyruntime-python/src/lib.rs index de63f85..4192458 100644 --- a/crates/tinyruntime-python/src/lib.rs +++ b/crates/tinyruntime-python/src/lib.rs @@ -75,6 +75,6 @@ pub fn is_compatible_with_contract() -> bool { // very types the module serves rather than copies of them. pub use tinyruntime_bus::{ ArchiveFormat, CONTRACT_VERSION, Distribution, Language, LayoutRequest, LayoutResponse, - PROVIDER_INTERFACE, PROVIDER_METHODS, PROVIDER_OBJECT_PATH, PYTHON, ProviderDescriptor, - RuntimeLayout, RuntimeSettings, WORKER_PROTOCOL_VERSION, WorkerHarness, names, + PROVIDER_INTERFACE, PROVIDER_METHODS, PYTHON, ProviderDescriptor, RuntimeLayout, + RuntimeSettings, WORKER_PROTOCOL_VERSION, WorkerHarness, names, object_path_for, }; diff --git a/crates/tinyruntime-python/src/tinybus_module/mod.rs b/crates/tinyruntime-python/src/tinybus_module/mod.rs index 039b38b..ac21e1c 100644 --- a/crates/tinyruntime-python/src/tinybus_module/mod.rs +++ b/crates/tinyruntime-python/src/tinybus_module/mod.rs @@ -9,9 +9,12 @@ //! which standalone build to install from a moving release index, where the //! interpreter sits inside it, and what a warm Python worker is. //! -//! The interface it serves is [`names::PROVIDER_INTERFACE`], the same one every -//! provider serves — that is what makes them interchangeable. The well-known name -//! it claims is its own, because two peers cannot hold the same one. +//! The interface it implements is [`names::PROVIDER_INTERFACE`], the same one +//! every provider implements — that is what makes them interchangeable. The +//! well-known name it claims is its own, because two peers cannot hold the same +//! one, and it serves at the path derived from that name: `tinybus_module!` +//! builds this module's manifest path the same way, so serving anywhere else +//! would ship a manifest that disagreed with the object exported here. use std::path::Path; @@ -81,7 +84,7 @@ impl PythonProvider { async fn setup(connection: Connection) -> TinyBusResult<()> { connection .serve_at( - names::PROVIDER_OBJECT_PATH.try_into()?, + names::providers::PYTHON_OBJECT_PATH.try_into()?, PythonProvider { client: Client::new(), }, diff --git a/crates/tinyruntime-python/src/tinybus_module/test.rs b/crates/tinyruntime-python/src/tinybus_module/test.rs index 5777729..a22536f 100644 --- a/crates/tinyruntime-python/src/tinybus_module/test.rs +++ b/crates/tinyruntime-python/src/tinybus_module/test.rs @@ -29,7 +29,7 @@ async fn serving(bus: &MemoryBus) -> TinyBusResult<(Connection, tinybus::Proxy)> let client = Connection::connect(bus.connect().await?).await?; let proxy = client.proxy( names::providers::PYTHON, - names::PROVIDER_OBJECT_PATH, + names::providers::PYTHON_OBJECT_PATH, names::PROVIDER_INTERFACE, )?; Ok((module, proxy)) @@ -52,6 +52,17 @@ fn declared_methods_match_the_dispatch_table() { assert_eq!(methods, names::PROVIDER_METHODS.to_vec()); } +#[test] +fn the_object_path_is_the_one_the_manifest_will_declare() { + // `tinybus_module!` derives this module's manifest path from its bus name. + // Serving anywhere else ships a manifest that disagrees with the object + // actually exported, which no amount of in-process testing would catch. + assert_eq!( + names::providers::PYTHON_OBJECT_PATH, + names::object_path_for(names::providers::PYTHON) + ); +} + #[test] fn the_served_interface_is_the_shared_provider_interface() { // Serving anything else would make this module unroutable: the router diff --git a/crates/tinyruntime-python/tests/public_api.rs b/crates/tinyruntime-python/tests/public_api.rs index b9a49e4..3731ce4 100644 --- a/crates/tinyruntime-python/tests/public_api.rs +++ b/crates/tinyruntime-python/tests/public_api.rs @@ -18,6 +18,10 @@ fn the_provider_serves_the_shared_interface_from_the_contract() { names::PROVIDER_INTERFACE, tinyruntime_python::PROVIDER_INTERFACE ); + assert_eq!( + names::providers::PYTHON_OBJECT_PATH, + names::object_path_for(names::providers::PYTHON) + ); assert_eq!(names::PROVIDER_METHODS.len(), 5); assert_eq!(Language::python().as_str(), PYTHON); } diff --git a/vendor/tinyruntime b/vendor/tinyruntime index 8106f3c..cf67fd3 160000 --- a/vendor/tinyruntime +++ b/vendor/tinyruntime @@ -1 +1 @@ -Subproject commit 8106f3cad029a1d3a1d22869f00859e7d33c2fb3 +Subproject commit cf67fd38f039767cc40814f9b09d6956aee93ad9 From e86ad0ac61273e99724fd473a0906edb050b03ff Mon Sep 17 00:00:00 2001 From: Steven Enamakel Date: Fri, 21 Aug 2026 22:50:01 +0300 Subject: [PATCH 17/19] feat(python): add testable select and layout functions Extract the release-fetching and interpreter-finding logic behind testable helpers that accept the API URL and platform flag as parameters, so the unit tests can exercise both the Windows and Unix code paths without reaching GitHub or relying on cfg-based branching. Auto-committed-on: dragonfly Co-authored-by: Medulla --- .../src/distribution/mod.rs | 30 ++++- .../src/distribution/test.rs | 124 ++++++++++++++++++ crates/tinyruntime-python/src/layout/mod.rs | 25 +++- crates/tinyruntime-python/src/layout/test.rs | 91 +++++++++++++ 4 files changed, 261 insertions(+), 9 deletions(-) diff --git a/crates/tinyruntime-python/src/distribution/mod.rs b/crates/tinyruntime-python/src/distribution/mod.rs index 3faf202..10c943d 100644 --- a/crates/tinyruntime-python/src/distribution/mod.rs +++ b/crates/tinyruntime-python/src/distribution/mod.rs @@ -37,8 +37,26 @@ const RELEASES_API: &str = /// Returns [`Error::IndexUnavailable`] when the release index cannot be read, /// and the selection errors from [`select_from`] otherwise. pub async fn select(client: &Client, settings: &RuntimeSettings) -> Result { + select_from_api(client, RELEASES_API, settings).await +} + +/// [`select`] against a named release index. +/// +/// Split out so the request, the tag handling, and the failure mapping can be +/// tested against a server the test controls. Reaching GitHub from a unit test +/// would tie the suite to the network and to a release staying published, which +/// the repository's testing rules rule out. +/// +/// # Errors +/// +/// As [`select`]. +pub async fn select_from_api( + client: &Client, + releases_api: &str, + settings: &RuntimeSettings, +) -> Result { let suffix = host_suffix()?; - let release = fetch_release(client, settings.release_tag()).await?; + let release = fetch_release(client, releases_api, settings.release_tag()).await?; let distribution = index::select( &release, @@ -56,10 +74,14 @@ pub async fn select(client: &Client, settings: &RuntimeSettings) -> Result) -> Result { +async fn fetch_release( + client: &Client, + releases_api: &str, + tag: Option<&str>, +) -> Result { let url = match tag { - Some(tag) => format!("{RELEASES_API}/tags/{tag}"), - None => format!("{RELEASES_API}/latest"), + Some(tag) => format!("{releases_api}/tags/{tag}"), + None => format!("{releases_api}/latest"), }; client diff --git a/crates/tinyruntime-python/src/distribution/test.rs b/crates/tinyruntime-python/src/distribution/test.rs index 119bac4..e2ea487 100644 --- a/crates/tinyruntime-python/src/distribution/test.rs +++ b/crates/tinyruntime-python/src/distribution/test.rs @@ -213,3 +213,127 @@ fn this_machine_is_one_the_channel_publishes_for() { std::env::consts::ARCH ); } + +// --------------------------------------------------------------------------- +// Against a release index the test serves +// +// Reaching GitHub here would tie the suite to the network and to a release +// staying published. A loopback server gives the same code path with neither. +// --------------------------------------------------------------------------- + +use std::io::{BufRead, BufReader, Write}; +use std::net::TcpListener; + +use reqwest::Client; +use tinyruntime_bus::RuntimeSettings; + +/// Serve one JSON body, recording the path that was requested. +fn serve_index(body: String) -> (String, std::thread::JoinHandle) { + let listener = TcpListener::bind("127.0.0.1:0").expect("loopback is available"); + let base = format!("http://{}", listener.local_addr().expect("an address")); + + let handle = std::thread::spawn(move || { + let Ok((mut stream, _)) = listener.accept() else { + return String::new(); + }; + let Ok(clone) = stream.try_clone() else { + return String::new(); + }; + let mut reader = BufReader::new(clone); + let mut request_line = String::new(); + let _ = reader.read_line(&mut request_line); + let mut line = String::new(); + while reader.read_line(&mut line).unwrap_or(0) > 0 { + if line == "\r\n" { + break; + } + line.clear(); + } + let response = format!( + "HTTP/1.1 200 OK\r\nContent-Type: application/json\r\nContent-Length: {}\r\nConnection: close\r\n\r\n{body}", + body.len() + ); + let _ = stream.write_all(response.as_bytes()); + let _ = stream.flush(); + request_line + }); + + (base, handle) +} + +/// A release body holding one build for this host. +fn release_body_for_this_host() -> String { + let suffix = host_suffix().expect("this host is supported"); + serde_json::json!({ + "tag_name": "20240909", + "assets": [{ + "name": format!("cpython-3.12.4+20240909-{suffix}"), + "browser_download_url": "https://example.invalid/cpython.tar.gz", + "digest": "sha256:abc" + }] + }) + .to_string() +} + +#[tokio::test] +async fn a_build_is_selected_from_the_channels_current_release() { + let (base, server) = serve_index(release_body_for_this_host()); + + let chosen = super::select_from_api(&Client::new(), &base, &RuntimeSettings::new("3.12")) + .await + .expect("a build is selected"); + + assert_eq!(chosen.version, "3.12.4"); + assert_eq!(chosen.expected_sha256.as_deref(), Some("abc")); + let requested = server.join().expect("the server finished"); + assert!( + requested.contains("/latest"), + "an unpinned request should ask for the current release: {requested}" + ); +} + +#[tokio::test] +async fn a_pinned_release_tag_is_requested_by_name() { + let (base, server) = serve_index(release_body_for_this_host()); + + let mut settings = RuntimeSettings::new("3.12"); + settings.release_tag = "20240909".to_string(); + super::select_from_api(&Client::new(), &base, &settings) + .await + .expect("a build is selected"); + + let requested = server.join().expect("the server finished"); + assert!( + requested.contains("/tags/20240909"), + "a pinned tag was not requested: {requested}" + ); +} + +#[tokio::test] +async fn an_index_that_is_not_the_expected_shape_is_reported_as_unreadable() { + let (base, server) = serve_index("{\"unexpected\": true}".to_string()); + + let error = super::select_from_api(&Client::new(), &base, &RuntimeSettings::new("3.12")) + .await + .expect_err("a body that is not a release cannot be read"); + assert!(matches!(error, Error::IndexUnavailable(_)), "got {error:?}"); + let _ = server.join(); +} + +#[tokio::test] +async fn an_unreachable_channel_is_reported_without_the_url() { + // These messages reach a host's UI; a URL can carry a token. + let error = super::select_from_api( + &Client::new(), + "http://127.0.0.1:1", + &RuntimeSettings::new("3.12"), + ) + .await + .expect_err("an unreachable channel fails"); + + let Error::IndexUnavailable(reason) = &error else { + panic!("got {error:?}"); + }; + assert!(!reason.contains("127.0.0.1"), "got `{reason}`"); + assert!(reason.contains("connection"), "got `{reason}`"); +} diff --git a/crates/tinyruntime-python/src/layout/mod.rs b/crates/tinyruntime-python/src/layout/mod.rs index 0eb3752..88a330e 100644 --- a/crates/tinyruntime-python/src/layout/mod.rs +++ b/crates/tinyruntime-python/src/layout/mod.rs @@ -72,13 +72,23 @@ pub fn from_parts(bin_dir: &Path, interpreter: &Path, version: &str) -> RuntimeL /// inside some package's test fixtures. #[must_use] pub fn find_interpreter(install_dir: &Path) -> Option { + find_interpreter_for(install_dir, cfg!(windows)) +} + +/// [`find_interpreter`] with the platform stated explicitly. +/// +/// The Windows shape is only correct by matching what the channel ships, and a +/// `cfg!(windows)` branch is never executed on the machines that run this suite. +/// Passing the platform in is what lets both shapes be checked everywhere. +#[must_use] +pub fn find_interpreter_for(install_dir: &Path, windows: bool) -> Option { for root in [install_dir.join("python"), install_dir.to_path_buf()] { - let bin_dir = if cfg!(windows) { + let bin_dir = if windows { root.clone() } else { root.join("bin") }; - for name in interpreter_names() { + for name in interpreter_names(windows) { let candidate = bin_dir.join(&name); if candidate.is_file() { return Some(candidate); @@ -93,9 +103,9 @@ pub fn find_interpreter(install_dir: &Path) -> Option { /// The versioned names come first because a build may ship `python3.12` without /// the generic symlinks, and because on a host install `python` may well be a /// Python 2 left over from a previous decade. -fn interpreter_names() -> Vec { +fn interpreter_names(windows: bool) -> Vec { let mut names = Vec::new(); - if cfg!(windows) { + if windows { names.push("python.exe".to_owned()); return names; } @@ -109,7 +119,12 @@ fn interpreter_names() -> Vec { /// Package-installer filenames to try. fn pip_names() -> Vec { - if cfg!(windows) { + pip_names_for(cfg!(windows)) +} + +/// [`pip_names`] with the platform stated explicitly. +fn pip_names_for(windows: bool) -> Vec { + if windows { vec!["pip.exe".to_owned(), "pip3.exe".to_owned()] } else { vec!["pip3".to_owned(), "pip".to_owned()] diff --git a/crates/tinyruntime-python/src/layout/test.rs b/crates/tinyruntime-python/src/layout/test.rs index 327d3af..8eec99b 100644 --- a/crates/tinyruntime-python/src/layout/test.rs +++ b/crates/tinyruntime-python/src/layout/test.rs @@ -4,6 +4,8 @@ use std::fs; use std::path::Path; +use tinyruntime_bus::RuntimeSettings; + use super::{find_interpreter, from_parts}; /// Build an unpacked standalone build with the named files in its bin directory. @@ -85,3 +87,92 @@ fn an_install_without_pip_is_still_a_usable_layout() { assert!(layout.executable("python").is_some()); assert!(layout.executable("pip").is_none()); } + +#[test] +fn the_windows_layout_is_checked_everywhere_rather_than_only_on_windows() { + // A standalone build on Windows has no `bin/` directory and ships + // `python.exe`. Neither is exercised by a `cfg!` branch on Linux. + let scratch = tempfile::tempdir().unwrap(); + let root = scratch.path().join("python"); + std::fs::create_dir_all(&root).unwrap(); + std::fs::write(root.join("python.exe"), b"").unwrap(); + + let found = super::find_interpreter_for(scratch.path(), true) + .expect("the Windows interpreter is found"); + assert!( + found.ends_with("python/python.exe"), + "found {}", + found.display() + ); + + assert!( + super::find_interpreter_for(scratch.path(), false).is_none(), + "the Unix search must not match a Windows layout" + ); +} + +#[test] +fn the_package_installer_is_named_per_platform() { + assert_eq!(super::pip_names_for(true), vec!["pip.exe", "pip3.exe"]); + assert_eq!(super::pip_names_for(false), vec!["pip3", "pip"]); +} + +/// Write an executable standing in for an interpreter, printing `version`. +#[cfg(unix)] +fn fake_python(bin: &Path, version: &str) { + use std::os::unix::fs::PermissionsExt; + + let path = bin.join("python3"); + fs::write(&path, format!("#!/bin/sh\necho '{version}'\n")).expect("the script writes"); + fs::set_permissions(&path, fs::Permissions::from_mode(0o755)).expect("it is executable"); +} + +#[cfg(unix)] +#[tokio::test] +async fn an_install_inside_the_requested_range_is_described() { + let scratch = tempfile::tempdir().unwrap(); + let bin = fabricate(scratch.path(), &["pip3"]); + fake_python(&bin, "Python 3.12.4"); + + let layout = super::describe(scratch.path(), &RuntimeSettings::new("3.12")) + .await + .expect("a compatible install is described"); + + assert_eq!(layout.version, "3.12.4"); + assert!(layout.executable("python").is_some()); + assert!(layout.executable("pip").is_some()); +} + +#[cfg(unix)] +#[tokio::test] +async fn an_install_outside_the_requested_range_is_not_described() { + // The router scans a cache that may hold several series; reporting one the + // caller excluded would run the wrong interpreter. + let scratch = tempfile::tempdir().unwrap(); + let bin = fabricate(scratch.path(), &[]); + fake_python(&bin, "Python 3.11.9"); + + assert!( + super::describe(scratch.path(), &RuntimeSettings::new("3.12")) + .await + .is_none() + ); +} + +#[cfg(unix)] +#[tokio::test] +async fn an_install_whose_interpreter_does_not_answer_is_not_described() { + use std::os::unix::fs::PermissionsExt; + + let scratch = tempfile::tempdir().unwrap(); + let bin = fabricate(scratch.path(), &[]); + let path = bin.join("python3"); + fs::write(&path, "#!/bin/sh\nexit 1\n").unwrap(); + fs::set_permissions(&path, fs::Permissions::from_mode(0o755)).unwrap(); + + assert!( + super::describe(scratch.path(), &RuntimeSettings::new("3.12")) + .await + .is_none() + ); +} From cdeb48a5ae1b8e6976d70df2a67bccf0fcaf8b3e Mon Sep 17 00:00:00 2001 From: Steven Enamakel Date: Fri, 21 Aug 2026 22:50:47 +0300 Subject: [PATCH 18/19] feat(system): make host detection testable by injecting the search path Extract the PATH lookup into a parameter so that tests can control which directories are searched without modifying the process environment, which is forbidden by the workspace-wide unsafe ban and would cause interference between concurrent tests. Add a comprehensive test suite that exercises candidate ordering, version filtering, and the Windows-specific .exe suffix lookup on all platforms. Auto-committed-on: dragonfly Co-authored-by: Medulla --- crates/tinyruntime-python/src/system/mod.rs | 40 +++++-- crates/tinyruntime-python/src/system/test.rs | 110 ++++++++++++++++++- 2 files changed, 135 insertions(+), 15 deletions(-) diff --git a/crates/tinyruntime-python/src/system/mod.rs b/crates/tinyruntime-python/src/system/mod.rs index af7431b..3577175 100644 --- a/crates/tinyruntime-python/src/system/mod.rs +++ b/crates/tinyruntime-python/src/system/mod.rs @@ -32,6 +32,19 @@ const PROBE_TIMEOUT: Duration = Duration::from_secs(5); /// Returns `None` when nothing suitable is installed, which is the signal for /// the router to install a managed build instead. pub async fn detect(settings: &RuntimeSettings) -> Option { + detect_in(settings, std::env::var_os("PATH").as_ref()).await +} + +/// [`detect`] with the search path supplied explicitly. +/// +/// Split out so a test can point the probe at a directory it controls. Rewriting +/// the process environment is not an option — `unsafe` is forbidden +/// workspace-wide, and a shared `PATH` would make concurrent tests interfere — +/// and the candidate ordering here is the whole point of the module. +pub async fn detect_in( + settings: &RuntimeSettings, + path_var: Option<&std::ffi::OsString>, +) -> Option { let Some(minimum) = version::parse_version(&settings.version) else { tracing::warn!( "[tinyruntime-python] the minimum version is not a version; skipping host detection" @@ -40,7 +53,7 @@ pub async fn detect(settings: &RuntimeSettings) -> Option { }; for candidate in candidates(settings.preferred_command(), minimum) { - let Some(path) = locate(&candidate) else { + let Some(path) = locate(&candidate, path_var) else { continue; }; let Some(reported) = probe_version(&path).await else { @@ -93,28 +106,37 @@ fn candidates(preferred: Option<&str>, minimum: Version) -> Vec { } /// Resolve a command to an executable file, searching `PATH` for a bare name. -fn locate(command: &str) -> Option { +fn locate(command: &str, path_var: Option<&std::ffi::OsString>) -> Option { let as_path = Path::new(command); if as_path.is_absolute() || as_path.components().count() > 1 { return is_executable(as_path).then(|| as_path.to_path_buf()); } - let path_var = std::env::var_os("PATH")?; - for directory in std::env::split_paths(&path_var) { + let path_var = path_var?; + for directory in std::env::split_paths(path_var) { let candidate = directory.join(command); if is_executable(&candidate) { return Some(candidate); } - if cfg!(windows) { - let with_extension = directory.join(format!("{command}.exe")); - if is_executable(&with_extension) { - return Some(with_extension); - } + if let Some(found) = windows_executable(&directory, command, cfg!(windows)) { + return Some(found); } } None } +/// The `.exe` a bare command names on Windows, if it is there. +/// +/// The platform is a parameter rather than a `cfg!`, so the Windows lookup is +/// exercised on the machines that actually run this suite. +fn windows_executable(directory: &Path, command: &str, windows: bool) -> Option { + if !windows { + return None; + } + let candidate = directory.join(format!("{command}.exe")); + is_executable(&candidate).then_some(candidate) +} + /// Whether `path` is a file this process could execute. #[cfg(unix)] fn is_executable(path: &Path) -> bool { diff --git a/crates/tinyruntime-python/src/system/test.rs b/crates/tinyruntime-python/src/system/test.rs index 795148b..e82b168 100644 --- a/crates/tinyruntime-python/src/system/test.rs +++ b/crates/tinyruntime-python/src/system/test.rs @@ -5,7 +5,7 @@ use std::path::Path; use tinyruntime_bus::RuntimeSettings; -use super::{candidates, detect, locate, probe_version}; +use super::{candidates, detect, detect_in, locate, probe_version, windows_executable}; use crate::version::parse_version; #[test] @@ -37,15 +37,113 @@ fn the_series_name_follows_the_configured_floor() { #[test] fn an_absolute_command_that_is_not_there_does_not_resolve() { - assert!(locate("/nonexistent/path/to/python3").is_none()); + assert!(locate("/nonexistent/path/to/python3", None).is_none()); } #[cfg(unix)] #[test] -fn a_bare_command_resolves_through_path() { - // `sh` is on PATH on every Unix host, so this exercises the lookup without - // depending on Python being installed. - assert!(locate("sh").is_some(), "PATH lookup found nothing at all"); +fn a_bare_command_resolves_through_the_search_path() { + let path = std::env::var_os("PATH").expect("a host has a PATH"); + assert!( + locate("sh", Some(&path)).is_some(), + "PATH lookup found nothing at all" + ); +} + +#[test] +fn a_bare_command_with_no_search_path_does_not_resolve() { + assert!(locate("python3", None).is_none()); +} + +#[test] +fn the_windows_executable_lookup_is_checked_everywhere() { + let scratch = tempfile::tempdir().expect("scratch directory"); + let named = scratch.path().join("python.exe"); + std::fs::write(&named, b"binary").expect("the file writes"); + #[cfg(unix)] + { + use std::os::unix::fs::PermissionsExt; + std::fs::set_permissions(&named, std::fs::Permissions::from_mode(0o755)).unwrap(); + } + + assert_eq!( + windows_executable(scratch.path(), "python", true), + Some(named) + ); + assert_eq!( + windows_executable(scratch.path(), "python", false), + None, + "the lookup must not fire off Windows" + ); +} + +/// Write an executable standing in for an interpreter, printing `version`. +#[cfg(unix)] +fn fake_python(directory: &Path, name: &str, version: &str) -> std::path::PathBuf { + use std::os::unix::fs::PermissionsExt; + + let path = directory.join(name); + std::fs::write(&path, format!("#!/bin/sh\necho '{version}'\n")).expect("the script writes"); + std::fs::set_permissions(&path, std::fs::Permissions::from_mode(0o755)) + .expect("the script is executable"); + path +} + +#[cfg(unix)] +#[tokio::test] +async fn an_interpreter_inside_the_range_is_reused() { + let scratch = tempfile::tempdir().expect("scratch directory"); + fake_python(scratch.path(), "python3", "Python 3.13.1"); + + let path = std::ffi::OsString::from(scratch.path()); + let layout = detect_in(&RuntimeSettings::new("3.12"), Some(&path)) + .await + .expect("a newer interpreter satisfies a floor"); + assert_eq!(layout.version, "3.13.1"); + assert!(layout.executable("python").is_some()); +} + +#[cfg(unix)] +#[tokio::test] +async fn the_series_specific_name_is_preferred_over_the_generic_one() { + // On a machine with both, `python3` is often the older one. + let scratch = tempfile::tempdir().expect("scratch directory"); + fake_python(scratch.path(), "python3", "Python 3.12.0"); + fake_python(scratch.path(), "python3.14", "Python 3.14.1"); + + let path = std::ffi::OsString::from(scratch.path()); + let layout = detect_in(&RuntimeSettings::new("3.14"), Some(&path)) + .await + .expect("the versioned binary is found"); + assert_eq!(layout.version, "3.14.1"); +} + +#[cfg(unix)] +#[tokio::test] +async fn an_interpreter_below_the_floor_is_not_reused() { + let scratch = tempfile::tempdir().expect("scratch directory"); + fake_python(scratch.path(), "python3", "Python 3.11.9"); + + let path = std::ffi::OsString::from(scratch.path()); + assert!( + detect_in(&RuntimeSettings::new("3.12"), Some(&path)) + .await + .is_none() + ); +} + +#[cfg(unix)] +#[tokio::test] +async fn an_interpreter_that_prints_nothing_useful_is_skipped() { + let scratch = tempfile::tempdir().expect("scratch directory"); + fake_python(scratch.path(), "python3", "not-a-version"); + + let path = std::ffi::OsString::from(scratch.path()); + assert!( + detect_in(&RuntimeSettings::new("3.12"), Some(&path)) + .await + .is_none() + ); } #[cfg(unix)] From dacd47b9c3af586e0cb322a58dffb90f47597d3d Mon Sep 17 00:00:00 2001 From: Steven Enamakel Date: Fri, 21 Aug 2026 23:23:37 +0300 Subject: [PATCH 19/19] Wait for a fake interpreter to be runnable before probing it MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit A script written and immediately executed can transiently fail to exec, and the probe reports any failure as "no interpreter" — so the flake surfaced as a confusing assertion failure rather than as what it was. The fixture now waits until the script actually runs. Co-authored-by: Medulla --- crates/tinyruntime-python/src/layout/test.rs | 20 +++++++++++++++++++ crates/tinyruntime-python/src/system/test.rs | 21 +++++++++++++++++++- 2 files changed, 40 insertions(+), 1 deletion(-) diff --git a/crates/tinyruntime-python/src/layout/test.rs b/crates/tinyruntime-python/src/layout/test.rs index 8eec99b..a0991a3 100644 --- a/crates/tinyruntime-python/src/layout/test.rs +++ b/crates/tinyruntime-python/src/layout/test.rs @@ -118,6 +118,11 @@ fn the_package_installer_is_named_per_platform() { } /// Write an executable standing in for an interpreter, printing `version`. +/// +/// Waits until the script actually runs before returning. A file written and +/// immediately executed can transiently fail — the kernel may still see a writer +/// on it — and a failed probe is reported as "no interpreter", which would +/// surface as a confusing assertion failure rather than as the flake it is. #[cfg(unix)] fn fake_python(bin: &Path, version: &str) { use std::os::unix::fs::PermissionsExt; @@ -125,6 +130,21 @@ fn fake_python(bin: &Path, version: &str) { let path = bin.join("python3"); fs::write(&path, format!("#!/bin/sh\necho '{version}'\n")).expect("the script writes"); fs::set_permissions(&path, fs::Permissions::from_mode(0o755)).expect("it is executable"); + + for _ in 0..50 { + if std::process::Command::new(&path) + .arg("--version") + .output() + .is_ok_and(|out| out.status.success()) + { + return; + } + std::thread::sleep(std::time::Duration::from_millis(20)); + } + panic!( + "the fake interpreter at {} never became runnable", + path.display() + ); } #[cfg(unix)] diff --git a/crates/tinyruntime-python/src/system/test.rs b/crates/tinyruntime-python/src/system/test.rs index e82b168..a86fef5 100644 --- a/crates/tinyruntime-python/src/system/test.rs +++ b/crates/tinyruntime-python/src/system/test.rs @@ -78,6 +78,11 @@ fn the_windows_executable_lookup_is_checked_everywhere() { } /// Write an executable standing in for an interpreter, printing `version`. +/// +/// Waits until the script actually runs before returning. A file written and +/// immediately executed can transiently fail — the kernel may still see a writer +/// on it — and a failed probe is reported as "no interpreter", which would +/// surface as a confusing assertion failure rather than as the flake it is. #[cfg(unix)] fn fake_python(directory: &Path, name: &str, version: &str) -> std::path::PathBuf { use std::os::unix::fs::PermissionsExt; @@ -86,7 +91,21 @@ fn fake_python(directory: &Path, name: &str, version: &str) -> std::path::PathBu std::fs::write(&path, format!("#!/bin/sh\necho '{version}'\n")).expect("the script writes"); std::fs::set_permissions(&path, std::fs::Permissions::from_mode(0o755)) .expect("the script is executable"); - path + + for _ in 0..50 { + if std::process::Command::new(&path) + .arg("--version") + .output() + .is_ok_and(|out| out.status.success()) + { + return path; + } + std::thread::sleep(std::time::Duration::from_millis(20)); + } + panic!( + "the fake interpreter at {} never became runnable", + path.display() + ); } #[cfg(unix)]