release.yml

name: Release
on:
  push:
    tags: ['v*']
  workflow_dispatch:
    inputs:
      tag:
        description: 'Tag (e.g. v1.0.0)'
        required: true

permissions:
  contents: write

jobs:
  release:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
        with:
          ref: ${{ github.event.inputs.tag || github.ref_name }}

      - name: Get tag
        id: tag
        run: echo "tag=${{ github.event.inputs.tag || github.ref_name }}" >> $GITHUB_OUTPUT

      - name: Extract release notes
        id: notes
        run: |
          VERSION="${{ steps.tag.outputs.tag }}"
          VERSION_NUM="${VERSION#v}"
          NOTES=""
          if [ -f CHANGELOG.md ]; then
            NOTES=$(awk -v ver="$VERSION_NUM" '
              /^## / { if (found) exit; if ($2 == ver) { found=1; next } }
              found { print }
            ' CHANGELOG.md)
          fi
          if [ -n "$NOTES" ]; then
            echo "has_notes=true" >> $GITHUB_OUTPUT
            echo 'notes<<EOF' >> $GITHUB_OUTPUT
            echo "$NOTES" >> $GITHUB_OUTPUT
            echo 'EOF' >> $GITHUB_OUTPUT
          else
            echo "has_notes=false" >> $GITHUB_OUTPUT
          fi

      - uses: softprops/action-gh-release@v2
        with:
          tag_name: ${{ steps.tag.outputs.tag }}
          body: ${{ steps.notes.outputs.has_notes == 'true' && steps.notes.outputs.notes || '' }}
          generate_release_notes: ${{ steps.notes.outputs.has_notes != 'true' }}