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## Why Bazel CI had two independent Windows issues: - The workflow saved/restored `~/.cache/bazel-repo-cache`, but `.bazelrc` configured `common:ci-windows --repository_cache=D:/a/.cache/bazel-repo-cache`, so `actions/cache` and Bazel could point at different directories. - The Windows `Bazel clippy` job passed the full explicit target list from `//codex-rs/...`, but some of those explicit targets are intentionally incompatible with `//:local_windows`. `run-argument-comment-lint-bazel.sh` already handles that with `--skip_incompatible_explicit_targets`; the clippy workflow path did not. I also tried switching the workflow cache path to `D:\a\.cache\bazel-repo-cache`, but the Windows clippy job repeatedly failed with `Failed to restore: Cache service responded with 400`, so the final change standardizes on `$HOME/.cache/bazel-repo-cache` and makes cache restore non-fatal. ## What Changed - Expose one repository-cache path from `.github/actions/setup-bazel-ci/action.yml` and export that path as `BAZEL_REPOSITORY_CACHE` so `run-bazel-ci.sh` passes it to Bazel after `--config=ci-*`. - Move `actions/cache/restore` out of the composite action into `.github/workflows/bazel.yml`, and make restore failures non-fatal there. - Save exactly the exported cache path in `.github/workflows/bazel.yml`. - Remove `common:ci-windows --repository_cache=D:/a/.cache/bazel-repo-cache` from `.bazelrc` so the Windows CI config no longer disagrees with the workflow cache path. - Pass `--skip_incompatible_explicit_targets` in the Windows `Bazel clippy` job so incompatible explicit targets do not fail analysis while the lint aspect still traverses compatible Rust dependencies. ## Verification - Parsed `.github/actions/setup-bazel-ci/action.yml` and `.github/workflows/bazel.yml` with Ruby's YAML loader. - Resubmitted PR `#16740`; CI is rerunning on the amended commit.
Workflow Strategy
The workflows in this directory are split so that pull requests get fast, review-friendly signal while main still gets the full cross-platform verification pass.
Pull Requests
bazel.ymlis the main pre-merge verification path for Rust code. It runs Bazeltestand Bazelclippyon the supported Bazel targets, including the generated Rust test binaries needed to lint inline#[cfg(test)]code.rust-ci.ymlkeeps the Cargo-native PR checks intentionally small:cargo fmt --checkcargo shearargument-comment-linton Linux, macOS, and Windowstools/argument-comment-lintpackage tests when the lint or its workflow wiring changes
Post-Merge On main
bazel.ymlalso runs on pushes tomain. This re-verifies the merged Bazel path and helps keep the BuildBuddy caches warm.rust-ci-full.ymlis the full Cargo-native verification workflow. It keeps the heavier checks off the PR path while still validating them after merge:- the full Cargo
clippymatrix - the full Cargo
nextestmatrix - release-profile Cargo builds
- cross-platform
argument-comment-lint - Linux remote-env tests
- the full Cargo
Rule Of Thumb
- If a build/test/clippy check can be expressed in Bazel, prefer putting the PR-time version in
bazel.yml. - Keep
rust-ci.ymlfast enough that it usually does not dominate PR latency. - Reserve
rust-ci-full.ymlfor heavyweight Cargo-native coverage that Bazel does not replace yet.