Files
Adam Perry @ OpenAI 6869d17cc2 Enable user namespaces in shared CI setup (#39606)
## What changed

- Enable unprivileged user namespaces for every Linux job that uses the shared
  `setup-ci` action.
- Disable AppArmor's unprivileged user namespace restriction when that sysctl is
  available.
- Remove the duplicate setup from the two nextest workflow jobs.

GitOrigin-RevId: a5aebe0795ada435e687826134411c8b1c28bd98
2026-08-20 05:59:06 +00:00
..

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

  • Required checks run against GitHub's synthetic merge commit, not the pull request head alone. This includes changes already on main and catches conflicts before they reach the branch.
  • bazel.yml is the main pre-merge verification path for Rust code. It runs Bazel test and Bazel clippy on the supported Bazel targets, including the generated Rust test binaries needed to lint inline #[cfg(test)] code.
  • rust-ci.yml keeps the Cargo-native PR checks intentionally small:
    • cargo fmt --check
    • cargo shear
    • argument-comment-lint on Linux, macOS, and Windows
    • tools/argument-comment-lint package tests when the lint or its workflow wiring changes

Post-Merge On main

  • bazel.yml also runs on pushes to main. This re-verifies the merged Bazel path and helps keep the BuildBuddy caches warm.
  • rust-ci-full.yml is the full Cargo-native verification workflow. It keeps the heavier checks off the PR path while still validating them after merge:
    • the full Cargo clippy matrix
    • the full Cargo nextest matrix via per-platform archive-backed shards
    • Windows ARM64 nextest archives cross-compiled on Windows x64, then replayed on native Windows ARM64 shards
    • release-profile Cargo builds
    • cross-platform argument-comment-lint
    • Linux remote-env tests

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.yml fast enough that it usually does not dominate PR latency.
  • Reserve rust-ci-full.yml for heavyweight Cargo-native coverage that Bazel does not replace yet.