release.yml

name: Release

on:
  push:
    tags:
      - "v*.*.*"

permissions:
  contents: write

jobs:
  release:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v7

      - name: Extract changelog section for this tag
        run: |
          VERSION="${GITHUB_REF_NAME#v}"

          if [ ! -f CHANGELOG.md ]; then
            echo "_CHANGELOG.md not found. See the commit comparison below._" > release_notes.md
            exit 0
          fi

          ESCAPED_VERSION=$(printf '%s' "$VERSION" | sed 's/\./\\./g')

          awk -v ver="$ESCAPED_VERSION" '
            BEGIN { found=0 }
            /^## \[/ {
              if (found) exit
              if ($0 ~ "\\[" ver "\\]") { found=1; next }
              next
            }
            found { print }
          ' CHANGELOG.md > release_notes.md 2>/dev/null

          if [ ! -s release_notes.md ]; then
            echo "_No CHANGELOG.md entry found for ${GITHUB_REF_NAME}. See the commit comparison below._" > release_notes.md
          fi

      - name: Create GitHub release
        uses: softprops/action-gh-release@v3
        with:
          body_path: release_notes.md
          generate_release_notes: true
          draft: true