Add basic bazel build (S-Core Integration)

.bazelrc

@@ -0,0 +1,45 @@
+# SPDX-FileCopyrightText: 2025 Copyright (c) Contributors to the Eclipse Foundation
+#
+# See the NOTICE file(s) distributed with this work for additional
+# information regarding copyright ownership.
+#
+# This program and the accompanying materials are made available under the
+# terms of the Apache License Version 2.0 which is available at
+# https://www.apache.org/licenses/LICENSE-2.0
+#
+# SPDX-License-Identifier: Apache-2.0
+
+# Classic Diagnostic Adapter - Bazel Configuration
+#
+# Usage:
+#   bazel build //:opensovd-cda                    # build with OpenSSL (default)
+#   bazel build --config=mbedtls //:opensovd-cda   # build with mbedtls
+
+# --- Common settings ---
+common --enable_bzlmod
+# enable experimental flag to allow private CDA crate universe
+common --experimental_isolated_extension_usages
+build --incompatible_enable_cc_toolchain_resolution
+
+# --- TLS backend selection ---
+# Default: OpenSSL
+build --//:tls_backend=openssl
+
+# Switch to mbedtls: bazel build --config=mbedtls //...
+build:mbedtls --//:tls_backend=mbedtls
+
+# Explicit openssl config (same as default, for clarity)
+build:openssl --//:tls_backend=openssl
+
+# --- Git metadata for cda-main build.rs ---
+build --workspace_status_command=bazel/workspace_status.sh
+
+# --- Performance ---
+build --jobs=auto
+
+# --- Convenience aliases ---
+# Build everything except integration tests
+build:all --build_tag_filters=-integration
+
+# Test everything except integration tests
+test:all --test_tag_filters=-integration

.github/workflows/bazel.yml

@@ -0,0 +1,55 @@
+# SPDX-FileCopyrightText: 2025 Copyright (c) Contributors to the Eclipse Foundation
+#
+# See the NOTICE file(s) distributed with this work for additional
+# information regarding copyright ownership.
+#
+# This program and the accompanying materials are made available under the
+# terms of the Apache License Version 2.0 which is available at
+# https://www.apache.org/licenses/LICENSE-2.0
+#
+# SPDX-License-Identifier: Apache-2.0
+
+name: Bazel Build
+
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+  workflow_dispatch:
+
+permissions:
+  contents: read
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref_name }}-${{ github.event.pull_request.number || github.sha }}
+  cancel-in-progress: true
+
+jobs:
+  bazel_build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          submodules: false
+
+      - name: Cache Bazel repository and build artifacts
+        uses: actions/cache@v4
+        with:
+          path: |
+            ~/.cache/bazel
+            ~/.cache/bazelisk
+          key: bazel-${{ runner.os }}-${{ hashFiles('MODULE.bazel', 'MODULE.bazel.lock') }}
+          restore-keys: |
+            bazel-${{ runner.os }}-
+
+      - name: Build with OpenSSL (default)
+        run: bazel build //:opensovd-cda
+
+      - name: Build with mbedtls
+        run: bazel build --config=mbedtls //:opensovd-cda
+
+      - name: Verify binary runs
+        run: bazel-bin/cda-main/opensovd-cda --version

.gitignore

@@ -37,6 +37,13 @@ mbedtls-4*
 # binary files (used in integration tests)
 *.bin
 
+# Bazel convenience symlinks and generated files
+/bazel-bin
+/bazel-out
+/bazel-testlogs
+/bazel-classic-diagnostic-adapter
+MODULE.bazel.lock
+
 # macOS metadata
 .DS_Store
 

.pre-commit-config.yaml

@@ -54,6 +54,7 @@ repos:
     rev: 07140bdd84f20b66fd4aff58a83c5148deec388c
     hooks:
       - id: reuse-annotate
+        exclude: '(^|/)(BUILD\.bazel|MODULE\.bazel|LICENSE|NOTICE|CONTRIBUTORS)$'
       - id: no-unicode-check
         args:
           - --allowed-chars=µ,§

BUILD.bazel

@@ -0,0 +1,44 @@
+# SPDX-License-Identifier: Apache-2.0
+# SPDX-FileCopyrightText: 2025 The Contributors to Eclipse OpenSOVD (see CONTRIBUTORS)
+#
+# See the NOTICE file(s) distributed with this work for additional
+# information regarding copyright ownership.
+#
+# This program and the accompanying materials are made available under the
+# terms of the Apache License Version 2.0 which is available at
+# https://www.apache.org/licenses/LICENSE-2.0
+
+# Root BUILD file for Classic Diagnostic Adapter.
+# Defines TLS backend config settings and a top-level binary alias.
+
+load("@bazel_skylib//rules:common_settings.bzl", "string_flag")
+
+package(default_visibility = ["//visibility:public"])
+
+# --- TLS backend selection ---
+# Controlled via .bazelrc: --//:tls_backend=openssl|mbedtls
+
+string_flag(
+    name = "tls_backend",
+    build_setting_default = "openssl",
+    values = [
+        "openssl",
+        "mbedtls",
+    ],
+)
+
+config_setting(
+    name = "use_openssl",
+    flag_values = {":tls_backend": "openssl"},
+)
+
+config_setting(
+    name = "use_mbedtls",
+    flag_values = {":tls_backend": "mbedtls"},
+)
+
+# --- Top-level alias to the CDA binary ---
+alias(
+    name = "opensovd-cda",
+    actual = "//cda-main:opensovd-cda",
+)