Action size: Minify JS bundle on release branches - #3920
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build.mjs
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Pull request overview
This PR reduces the size of the built JavaScript shipped on release branches by enabling esbuild minification when building for releases/v* (and related release-automation branches), while keeping main builds unminified to avoid high-churn bundle conflicts in day-to-day development.
Changes:
- Add release-branch-aware minification logic to build.mjs (with an env override).
- Update release automation to rebuild the Action whenever the merge is conflict-free.
- Document the behavior change in the changelog.
| File | Description |
|---|---|
| CHANGELOG.md | Adds a release note describing minified bundles on release branches. |
| build.mjs | Detects release/release-automation branches and conditionally enables esbuild minification. |
| .github/update-release-branch.py | Ensures release automation rebuilds the Action on conflict-free merges so minified artifacts are produced when appropriate. |
Copilot's findings
- Files reviewed: 3/3 changed files
- Comments generated: 3
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build.mjs
| function shouldMinify() { | ||
| const override = process.env.CODEQL_ACTION_MINIFY; | ||
| if (override === "true") return true; | ||
| if (override === "false") return false; |
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build.mjs
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| return execFileSync("git", ["rev-parse", "--abbrev-ref", "HEAD"], { | ||
| encoding: "utf-8", | ||
| stdio: ["pipe", "pipe", "ignore"], | ||
| }).trim(); |
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.github/update-release-branch.py
| # For backports, the only source-level change vs the source branch is the new version number, | ||
| # so we just need to refresh the version embedded in `lib/`. | ||
| run_command('npm', 'ci') | ||
| # We only expect changes to the JavaScript output, rebuilding e.g. the PR checks is unnecessary. |
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High-level comment: consider how minification may affect stack traces and whether that is worth an extra 20% reduction in size. |
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Minify the JS bundle on release branches to reduce the size of the .tar.gz'd Action checkout by a further ~20%.
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