name: Compute .yarnrc.yml hash

description: Compute a stable hash for .yarnrc.yml to use in cache keys.

outputs:
  hash:
    description: Hash of .yarnrc.yml (or "no-yarnrc" if the file is missing)
    value: ${{ steps.compute-yarnrc-hash.outputs.hash }}

runs:
  using: composite
  steps:
    - name: Compute .yarnrc.yml hash
      id: compute-yarnrc-hash
      shell: bash
      run: |
        if [ -f .yarnrc.yml ]; then
          if command -v shasum >/dev/null 2>&1; then
            echo "hash=$(shasum -a 256 .yarnrc.yml | awk '{ print $1 }')" >> "$GITHUB_OUTPUT"
          else
            echo "hash=$(sha256sum .yarnrc.yml | awk '{ print $1 }')" >> "$GITHUB_OUTPUT"
          fi
        else
          echo "hash=no-yarnrc" >> "$GITHUB_OUTPUT"
        fi