.github/actions/cache-bazel/action.yml

name: Store Bazel cache
description: Stores Bazel cache using actions/cache
inputs:
  workflow:
    description: Workflow name
    required: true
  key:
    description: Extra cache key
    required: true
runs:
  using: "composite"
  steps:
    - if: runner.os == 'Windows'
      name: Use GNU tar
      shell: cmd
      # https://github.com/actions/cache/blob/main/tips-and-workarounds.md#improving-cache-restore-performance-on-windowsusing-cross-os-caching
      # Bazel relies heavily on symlinks, so enable native support
      run: |
        echo C:\Program Files\Git\usr\bin>>"%GITHUB_PATH%"
        echo MSYS=winsymlinks:native>>"%GITHUB_ENV%"
    - if: runner.os == 'Windows'
      uses: actions/cache@v3
      with:
        # Ideally we would cache the whole external/ but it causes various
        # issues both on packing and unpacking cache.
        # The whole caching approached needs overhaul to make it work good
        # on Windows.
        path: |
          D:\_bazel\external\bundle
          D:\_bazel\external\rules_ruby
          D:\_bazel\external\rules_ruby_dist
          D:\_bazel-disk
          D:\_bazel-repo
        key: ${{ runner.os }}-bazel-${{ inputs.workflow }}-${{ inputs.key }}-${{ hashFiles('**/BUILD.bazel') }}
        restore-keys: |
          ${{ runner.os }}-bazel-${{ inputs.workflow }}-${{ inputs.key }}-
          ${{ runner.os }}-bazel-${{ inputs.workflow }}-
    - if: runner.os != 'Windows'
      uses: actions/cache@v3
      with:
        path: |
          /tmp/bazel/external
          ~/.cache/bazel-disk
          ~/.cache/bazel-repo
        key: ${{ runner.os }}-bazel-${{ inputs.workflow }}-${{ inputs.key }}-${{ hashFiles('**/BUILD.bazel') }}
        restore-keys: |
          ${{ runner.os }}-bazel-${{ inputs.workflow }}-${{ inputs.key }}-
          ${{ runner.os }}-bazel-${{ inputs.workflow }}-