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## develop #7292 +/- ##
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- Coverage 81.15% 79.55% -1.60%
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Files 622 600 -22
Lines 86016 77383 -8633
Branches 16421 15738 -683
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- Hits 69803 61564 -8239
- Misses 15207 15819 +612
+ Partials 1006 0 -1006
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Nice feature to have! If I may add my proposal, would it be possible to have an automatic link on commits that have a 'tag' field to the actual tag <orga_name>/<repo_name>/releases/tag/<tag_name>? |
I agree this is a good feature and something I thought about including. I decided to cut scope to first implement the overall functionality and syntax for link support. To me, the auto-linking functionality seems like additional options that would go into the chart configuration options that specify something like a link pattern. For example, imagine something like: I haven't worked through the syntax and UX yet. For users with GHE or other things they want to link to, I would imagine it needs to be thought about a bit more with additional examples. |
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looking to get some feedback here before i start endlessly dealing with merge conflicts |
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[sisyphus-bot]
Review: feat(gitGraph): Add interactive click support for commits, branches, and tags
First, a sincere apology for the delay, @mkobit — this PR has been open for 92 days and that's far too long for a contribution of this quality. Thank you for your patience and persistence.
What's working well
🎉 [praise] The security model is exemplary. Using native SVG <a> elements instead of JS onclick handlers, sanitizeUrl for URL validation, sanitizeText for tooltip sanitization, CSS.escape() for selector safety, and rel="noopener" for tab security — this is defense-in-depth done right. The explicit test cases for javascript: URL blocking and <script> tag stripping in tooltips show security was a first-class concern.
🎉 [praise] Outstanding test coverage — 3 new test files (gitGraphAst.spec.ts, gitGraphLink.spec.ts, gitGraphRenderer.click.spec.ts) covering DB operations, parser integration, and renderer behavior including edge cases (special characters in IDs, URL sanitization, link overwriting). Plus 9 E2E snapshot tests in cypress/integration/rendering/gitGraph.spec.js. This is exactly the level of thoroughness we want.
🎉 [praise] Clean grammar design in the Langium .langium file — the click syntax is intuitive (click commit "id" "url" "tooltip" _blank) and the target is properly constrained to valid HTML values (_blank, _self, _parent, _top). Using a dedicated statement type rather than allowing HTML in labels was the right architectural call.
🎉 [praise] Good use of data attributes (data-commit-id, data-branch-name, data-tag-name) for element selection rather than fragile class-based or positional selectors. Defensive copy pattern on getLinks() prevents external mutation of internal state.
🎉 [praise] Documentation and changeset both included with correct minor bump and clear examples showing all three click types (commit, branch, tag) with optional tooltip and target.
Items to address
🟡 [important] No explicit securityLevel guard in setupClickEvents()
gitGraphRenderer.ts — The securityLevel parameter is accepted by setupClickEvents() but never checked. The feature relies on the implicit assumption that click statements won't produce links in strict mode, but there's no explicit guard. If someone adds click statements to a diagram rendered in strict mode, the links would still be bound.
Suggested fix: Add an explicit guard at the top of setupClickEvents():
if (securityLevel === 'strict') {
log.debug('Click events disabled in strict securityLevel');
return undefined;
}This matches how flowchart handles it and makes the security boundary explicit rather than implicit.
🟡 [important] sanitizeUrl re-exported from utils.ts — consider import path
utils.ts now re-exports sanitizeUrl from @braintree/sanitize-url. This makes it available to all modules. However, the flowchart click handler and other diagrams import sanitizeUrl directly from @braintree/sanitize-url rather than through utils. For consistency, it would be better to either:
- Import directly from
@braintree/sanitize-url(matching existing pattern), or - Have all diagrams import from
utils.ts(but that's a broader refactor, out of scope)
Using the direct import avoids coupling the gitGraph feature to a new export from the shared utils module.
🟢 [nit] Sandbox mode target override is silent
gitGraphRenderer.ts — When in sandbox mode, the user-specified target is silently overridden to _top. A log.debug() message would help developers understand why their target setting is being ignored.
🟢 [nit] Langium grammar change requires regeneration check
The .langium grammar was modified. Per project conventions, pnpm --filter parser langium:generate must be run and the generated files in packages/parser/src/language/generated/ must be committed. CI should verify this, but worth confirming the generated files are included (I don't see them in the changed files list — they may need to be regenerated).
Security
No XSS or injection issues identified. The implementation follows security best practices:
- URL sanitization:
@braintree/sanitize-urlblocksjavascript:,data:,vbscript:schemes - Tooltip sanitization:
sanitizeText()strips HTML tags - SVG
<a>elements: Native browser link behavior, not inline JS handlers - CSS selector escaping:
CSS.escape()with fallback regex prevents selector injection rel="noopener": Prevents window.opener exploitation- DOMPurify: Final SVG output still passes through DOMPurify sanitization
The only gap is the missing explicit securityLevel check (see 🟡 above), which is a defense-in-depth concern rather than an exploitable vulnerability.
Self-check
- At least one 🎉 [praise] item exists (5)
- No duplicate comments
- Severity tally: 0 🔴 / 2 🟡 / 2 🟢 / 0 💡 / 5 🎉
- Verdict: COMMENT (2 🟡, no blocking items)
- Not a draft PR
- Tone check: appreciative, acknowledges delay, actionable
This is one of the best-implemented feature PRs I've reviewed — thorough security model, comprehensive tests, clean grammar design, and complete documentation. The two 🟡 items are straightforward. Let's get this across the finish line! 🚀
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[sisyphus-bot]
Supplementary Security Review: PR #7292
A deeper security pass surfaced a few additional findings worth addressing:
🟡 [important] sanitizeUrl return check is dead code
gitGraphRenderer.ts — The guard if (!sanitizedUrl) will never trigger. @braintree/sanitize-url returns "about:blank" for dangerous URLs, never undefined/null/"". The code works correctly (dangerous URLs get about:blank as href, which is benign), but the warning log is dead code.
Suggested fix: Check for the actual blocked value:
const sanitizedUrl = sanitizeUrl(linkData.link);
if (sanitizedUrl === 'about:blank') {
log.warn(`Blocked dangerous URL for ${linkData.type} "${id}": ${linkData.link}`);
return; // Skip this link entirely rather than creating an about:blank anchor
}Alternatively, consider using utils.formatUrl() which wraps sanitizeUrl and additionally respects securityLevel — this is what the flowchart diagram uses for its click handling.
🟡 [important] clickable CSS class never added — hover styles won't apply
styles.js defines extensive CSS rules for .commit.clickable, .branchLabel.clickable, and .tag.clickable (cursor, hover effects, focus styles). But setupClickEvents() in the renderer never adds the clickable class to elements that receive anchors. The flowchart equivalent explicitly calls this.setClass(ids, 'clickable').
This means there's no visual indication that an element is clickable — reducing usability and accessibility. Users won't know they can click until they happen to mouse over.
Suggested fix: Add the clickable class to each element group when wrapping it in an <a>:
element.classed('clickable', true);🟢 [nit] Missing noreferrer on rel attribute
The anchor uses rel="noopener" but not noreferrer. Adding rel="noopener noreferrer" would also suppress the Referer header — a minor privacy improvement, especially for diagrams embedding links to external sites.
These don't change the overall verdict (COMMENT with 2 🟡 from the main review + 2 🟡 here = 4 🟡 total). The security model is fundamentally sound — sanitizeUrl blocks dangerous schemes, SVG <a> elements go through DOMPurify, and the architecture is correct. These are defense-in-depth improvements.
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Sorry it took me so long to get back to this! |
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Hi @mkobit, thanks for addressing the issues from the review by @ashishjain0512 . [sisyphos-bot] What's Working Well 🎉 [praise] Every single item from the two prior bot reviews has been addressed, cleanly. The securityLevel === 'strict' guard in addInteraction, the about:blank check, the 🎉 [praise] The patch 4 refactor — changing addInteraction to return undefined instead of a bare when there's no interaction — is the right architectural call. The const 🎉 [praise] The three-file test suite (gitGraphAst.spec.ts, gitGraphLink.spec.ts, gitGraphRenderer.click.spec.ts) is thorough: DB unit tests, full parser round-trips Items to Address 🟡 [important] ClickTarget grammar accepts arbitrary strings via STRING — enables frame hijacking packages/parser/src/language/gitGraph/gitGraph.langium — The grammar rule: ClickTarget returns string: The STRING alternative makes the four keyword alternatives purely cosmetic — any quoted string is accepted. The value flows directly into a.attr('target', linkData.target) Fix: Remove STRING from ClickTarget so only the four safe keywords are accepted: ClickTarget returns string: 🟡 [important] No runtime allowlist for target in addInteraction gitGraphRenderer.ts — There's no runtime check that linkData.target is one of the four safe values before it's set as an attribute. The as any casts in parseClick mean the Fix: Add a runtime allowlist in addInteraction as defense-in-depth: const SAFE_TARGETS = new Set(['_self', '_blank', '_parent', '_top'] as const); This is independent of the grammar fix and matches the pattern in flowDb. 🟡 [important] No Cypress E2E snapshot for a diagram with click statements The existing E2E tests pass (no regression), which is great. But per the project's test strategy, renderer/style changes require E2E visual tests — and there's no baseline A single imgSnapshotTest in cypress/integration/rendering/git/gitGraph.spec.js using the demo diagram from the PR description would provide a visual regression baseline for it('should render gitGraph with click interactions', () => { Nits 🟢 [nit] href is optional in grammar but required in docs/syntax The Langium grammar has (href=STRING)? making the URL optional, but the PR description and docs document it as required (click ). A user who writes click 🟢 [nit] as any casts in parseClick db.setLink?.(click.id, click.href ?? '', click.type as any, click.tooltip, click.target as any); Once the grammar is fixed (removing STRING from ClickTarget), the generated AST will type target as '_blank' | '_self' | '_parent' | '_top' and these casts should be 🟢 [nit] sanitizeUrl vs formatUrl consistency addInteraction imports and uses sanitizeUrl directly from @braintree/sanitize-url, while the rest of the codebase (flowchart, class, state diagrams) uses utils.formatUrl() Security The core security model is sound:
The two 🟡 security items above are defense-in-depth concerns (tab-napping via arbitrary frame names), not confirmed XSS vectors. Self-Check
This PR is genuinely close to landing. The implementation quality is high and the security thinking shows in the code. Three targeted fixes — the grammar constraint, a |
| it('98: should render gitGraph with click interactions', () => { | ||
| imgSnapshotTest( | ||
| `gitGraph | ||
| commit id: "ONE" | ||
| commit id: "TWO" tag: "v1.0" | ||
| branch develop | ||
| commit id: "THREE" | ||
| checkout main | ||
| merge develop id: "FOUR" | ||
| click commit "ONE" "https://example.com/commit" "Commit Tooltip" | ||
| click branch "develop" "https://example.com/branch" "Branch Tooltip" | ||
| click tag "v1.0" "https://example.com/tag" "Tag Tooltip" | ||
| `, | ||
| { securityLevel: 'loose' } | ||
| ); | ||
| }); |
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i wasn't sure how to add a diff test that activates or handles the hover/clickable elements styling, so just added this test for now
… interactive styling
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I think this is in a fairly good state, thanks for all the feedback! I know this is fairly large for an additive PR but hoping it can still get traction for inclusion! |
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No actionable comments were generated in the recent review. 🎉 ℹ️ Recent review info
📝 Walkthrough
Merge Risk: ⚪ Minimal · up to GitGraph click behavior matches its documented syntax and the browser fixtures. No concrete merge-blocking risk was established. Pre-merge checks |
 |
| Check name | Status | Explanation |
|---|---|---|
| Title check |  |
The title clearly and concisely describes the main change: interactive click support for GitGraph commits, branches, and tags. |
| Description check | |
The description includes the required summary, issue reference, design decisions, implementation scope, testing and documentation checklist, and changeset confirmation. |
| Linked Issues check | |
Issue #5599 requests links or buttons in GitGraph, especially for commit IDs. The PR adds click syntax for commits, branches, and tags, stores link data, and renders navigable URLs with tooltips and… |
| Out of Scope Changes check | |
The changes stay within GitGraph link support. Grammar, database, renderer, security handling, accessibility styling, documentation, demos, changeset metadata, and tests implement or validate the feat… |
| Docstring Coverage | |
No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 7… |
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Actionable comments posted: 3
🤖 Prompt for all review comments with AI agents
Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.
Inline comments:
In `@packages/mermaid/src/diagrams/git/gitGraphTypes.ts`:
- Around line 132-140: The Git link registry currently keys links only by id,
causing commit, branch, and tag links with the same identifier to overwrite each
other. Update setLink, getLink, and getLinks across the Git graph DB/provider
contracts and implementations to use the (type, id) pair, require type for
lookups, and update renderer call sites accordingly; add a regression test
covering overlapping identifiers across link types.
In `@packages/mermaid/src/diagrams/git/styles.js`:
- Around line 178-188: Update the focus selectors in the Git diagram styles so
they target the outer anchor receiving focus via `a:focus-visible .clickable`,
including the text and commit descendant selectors. Preserve the existing hover
behavior and visual rules while ensuring keyboard focus feedback applies to
clickable groups and their commit shapes.
In `@packages/mermaid/src/docs/syntax/gitgraph.md`:
- Around line 278-292: Update the gitgraph click-link documentation note to
include securityLevel='sandbox' as enabled, and state that sandbox rendering
overrides the specified link target to _top. Keep the existing strict/loose
behavior and target syntax documentation intact.
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Fix all unresolved CodeRabbit comments on this PR:
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📒 Files selected for processing (18)
.changeset/dirty-corners-relax.mdcypress/integration/other/interaction.spec.jscypress/integration/rendering/git/gitGraph.spec.jscypress/platform/click_security_loose.htmlcypress/platform/click_security_strict.htmldemos/git.htmldocs/syntax/gitgraph.mdpackages/mermaid/src/diagrams/git/gitGraphAst.spec.tspackages/mermaid/src/diagrams/git/gitGraphAst.tspackages/mermaid/src/diagrams/git/gitGraphLink.spec.tspackages/mermaid/src/diagrams/git/gitGraphParser.tspackages/mermaid/src/diagrams/git/gitGraphRenderer.click.spec.tspackages/mermaid/src/diagrams/git/gitGraphRenderer.tspackages/mermaid/src/diagrams/git/gitGraphTypes.tspackages/mermaid/src/diagrams/git/styles.jspackages/mermaid/src/docs/syntax/gitgraph.mdpackages/parser/src/language/gitGraph/gitGraph.langiumpackages/parser/src/language/index.ts
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Looks like the ground moved from under this changeset's feet again. I'm working on rebasing and resolving the conflicts. |
…ickable-commits # Conflicts: # cypress/integration/other/interaction.spec.js # cypress/integration/rendering/git/gitGraph.spec.js
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Inline comments:
In `@packages/mermaid/src/docs/syntax/gitgraph.md`:
- Around line 278-282: Update both GitGraph documentation copies to document the
antiscript security level and quote URL values in every Click.href example so
they conform to the STRING grammar. Preserve the existing safe-link behavior and
apply identical changes in the package and root documentation.
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📒 Files selected for processing (13)
docs/syntax/gitgraph.mde2e/diagrams/gitgraph/98-should-render-gitgraph-with-click-interactions.mmde2e/helpers/util.tse2e/other/interaction.spec.jse2e/platform/click_security_loose.htmle2e/platform/click_security_strict.htmle2e/sheet-order.jsonpackages/mermaid/src/diagrams/git/gitGraphLink.spec.tspackages/mermaid/src/diagrams/git/gitGraphParser.tspackages/mermaid/src/diagrams/git/gitGraphRenderer.click.spec.tspackages/mermaid/src/diagrams/git/gitGraphRenderer.tspackages/mermaid/src/docs/syntax/gitgraph.mdpackages/parser/src/language/gitGraph/gitGraph.langium
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…ickable-commits # Conflicts: # e2e/diagrams/git/nightly-check/98-should-render-gitgraph-with-click-interactions.mmd
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I can't attach the label to run all tests, so still waiting for something from maintainers to move this forward or to close. |
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📑 Summary
Adds interactive click functionality to
gitGraphdiagrams, enabling clickable links on commits, branches, and tags. Users can navigate to external URLs by clicking diagram elements, with support for custom tooltips and link targets.Resolves #5599
🫙 Example
The diagram below shows the structure.
Syntax:
click <type> <id> <url> ["tooltip"] [target]<type>:commit,branch, ortag<id>: The element's identifier<url>: Target URL["tooltip"]: Optional hover text[target]: Optional link target (_blank,_self,_parent,_top)📏 Design decisions
Following flowchart interaction patterns
The implementation mirrors the click interaction syntax from flowchart diagrams to maintain consistency across Mermaid diagram types:
click <identifier> <url> ["tooltip"] [target]_self,_blank,_parent, and_topsecurityLevelconfiguration (disabled instrict, enabled inloose)Type-specific element targeting
Unlike
flowchartwhere node IDs are globally unique, gitGraph allows the same identifier to exist across different element types (a branch and commit can share an ID). The syntax requires explicit type specification to prevent ambiguity:gitGraph's grammar where elements are type-qualifiedSecurity and accessibility
External links include security and accessibility attributes:
rel="noopener noreferrer"to prevent tab-nabbing attacksrole="link"attribute for screen readers<title>elements with tooltip text for hover feedbackScope limitations
JavaScript callbacks not implemented: Unlike flowchart, this implementation only supports URL links, not JavaScript callback functions. This was a scope decision to deliver the core feature requested in #5599 (linking commits to external resources). Callback support can be added in future iterations if needed.
Use case context (from #5599)
As described in the original feature request, clickable commits make "Mermaid diagrams a powerful bridge between documentation and actual code review context." Teams can:
📋 Tasks
Make sure you
MERMAID_RELEASE_VERSIONis used for all new features.pnpm changesetand following the prompts. Changesets that add features should beminorand those that fix bugs should bepatch. Please prefix changeset messages withfeat:,fix:, orchore:.Summary
Adds
gitGraphclick statements for commits, branches, and tags. Links support optional tooltips and_self,_blank,_parent, or_toptargets.The parser and database store links by element type and ID. The renderer adds clickable SVG links with sanitized URLs, accessible labels, tooltip titles, and interactive styling. Link rendering follows
securityLevelbehavior, including blocking links instrictmode and using_topinsandboxmode.Adds syntax documentation, a Changesets entry, unit tests, and end-to-end interaction and visual-regression fixtures.
Testing
The changes add parser, database, renderer, and end-to-end tests. Test execution results were not provided.