release.yml

name: Release

on:
  push:
    tags:
      - 'v*'

permissions:
  contents: write

jobs:
  release:
    runs-on: ubuntu-latest

    steps:
      - name: Checkout code
        uses: actions/checkout@v4

      - name: Check tag matches package.json version
        run: |
          TAG_VERSION="${GITHUB_REF_NAME#v}"
          PACKAGE_VERSION=$(node -p "require('./package.json').version")
          echo "Tag version: $TAG_VERSION"
          echo "Package version: $PACKAGE_VERSION"

          if [ "$TAG_VERSION" != "$PACKAGE_VERSION" ]; then
            echo "❌ Tag ($TAG_VERSION) does not match package.json version ($PACKAGE_VERSION)"
            exit 1
          fi

      - name: Extract changelog section
        id: changelog
        run: |
          TAG="$GITHUB_REF_NAME"
          # Grab the CHANGELOG.md section for this tag, i.e. everything between
          # its own '## vX.Y.Z' heading and the next '## ' heading
          NOTES=$(awk -v tag="$TAG" '
            $0 ~ "^## " tag "([^0-9.]|$)" { found = 1; next }
            found && /^## / { exit }
            found { print }
          ' CHANGELOG.md)

          if [ -z "$(echo "$NOTES" | tr -d '[:space:]')" ]; then
            echo "No changelog entry found for $TAG, falling back to autogenerated notes"
            echo "found=false" >> $GITHUB_OUTPUT
          else
            echo "found=true" >> $GITHUB_OUTPUT
            {
              echo 'notes<<CHANGELOG_EOF'
              echo "$NOTES"
              echo 'CHANGELOG_EOF'
            } >> $GITHUB_OUTPUT
          fi

      - name: Create release
        uses: softprops/action-gh-release@v2
        with:
          name: ${{ github.ref_name }}
          body: ${{ steps.changelog.outputs.notes }}
          generate_release_notes: ${{ steps.changelog.outputs.found == 'false' }}