Set up your GitHub Actions workflow with a specific version of Bazelisk

Note that GitHub Actions includes Bazelisk by default as of actions/runner-images#490 so this setup is not necessary unless you want to customize the Bazelisk version, or are running Bazel inside a container.

This action sets up Bazelisk for use in actions by:

• optionally downloading and caching a version of Bazelisk by version and adding to PATH
• setting up cache for downloaded Bazel versions

• Updated to the node20 runtime by default
  • This requires a minimum Actions Runner version of v2.308.0 to run.

See action.yml

Basic:

steps:
- uses: actions/checkout@v4
- uses: bazelbuild/setup-bazelisk@v3
- name: Mount bazel cache  # Optional
  uses: actions/cache@v4
  with:
    path: "~/.cache/bazel"
    key: bazel
- run: bazel build //...

• This action doesn't work with PowerShell. Make sure to have shell: bash in you run: steps. (#3)
• Windows removes one of the slashes (/) when two are present (bazel test //tests/... becomes bazel test /tests/... and fails). (#4) As a workaround, don't have any prefix //. Since all runs start at WORKSPACE dir, it should work all the same.

Full workaround example on windows:

- name: Run tests
  run: bazel test tests/...
  shell: bash

The scripts and documentation in this project are released under the MIT License