release.yml

name: Release

on:
  push:
    branches: [main]

jobs:
  release:
    runs-on: ubuntu-latest
    permissions:
      contents: write
    outputs:
      changed: ${{ steps.version.outputs.changed }}
      version: ${{ steps.version.outputs.version }}
    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 2

      - name: Check for version change
        id: version
        run: |
          CURRENT=$(node -p "require('./package.json').version")
          git show HEAD~1:package.json > /tmp/prev-package.json 2>/dev/null || true
          PREVIOUS=$(node -p "try { require('/tmp/prev-package.json').version } catch { '' }")
          if [ "$CURRENT" != "$PREVIOUS" ] && [ -n "$CURRENT" ]; then
            echo "changed=true" >> "$GITHUB_OUTPUT"
            echo "version=$CURRENT" >> "$GITHUB_OUTPUT"
            echo "Version changed: $PREVIOUS -> $CURRENT"
          else
            echo "changed=false" >> "$GITHUB_OUTPUT"
            echo "No version change ($CURRENT)"
          fi

      - name: Create tag and release
        if: steps.version.outputs.changed == 'true'
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          VERSION: ${{ steps.version.outputs.version }}
        run: |
          TAG="v${VERSION}"
          git tag "$TAG"
          git push origin "$TAG"
          gh release create "$TAG" \
            --title "$TAG" \
            --generate-notes

  # Publish straight after the release is cut. Called as a reusable workflow
  # (not via the `release: published` event, which GITHUB_TOKEN-created releases
  # never fire) so a version bump on main now auto-publishes to npm with no
  # manual dispatch and no PAT. Skipped when the version didn't change.
  publish:
    needs: release
    if: needs.release.outputs.changed == 'true'
    uses: ./.github/workflows/publish.yml
    secrets: inherit