release-notes.yml

name: Release Notes

on:
  release:
    types: [created]

jobs:
  update-release-notes:
    runs-on: ubuntu-latest
    permissions:
      contents: write
    steps:
      - uses: actions/checkout@v4

      - name: Extract latest changelog and version
        id: extract_changelog
        run: |
          # Get the latest version section (everything between the first and second '## ')
          LATEST=$(sed -n '1,/^## /{/^## /p; /^## /q}' CHANGELOG.md | sed '1d')
          
          # Extract current version number
          CURRENT_VERSION=$(echo "$LATEST" | head -n 1 | sed 's/## \([0-9.]*\).*/\1/')
          
          # Find previous version by getting the second version header
          PREVIOUS_VERSION=$(sed -n '/^## [0-9]/{n;/^## /s/^## \([0-9.]*\).*/\1/p;q}' CHANGELOG.md)
          
          # Prepare the content for GitHub Actions
          echo "latest<<EOF" >> $GITHUB_ENV
          echo "$LATEST" >> $GITHUB_ENV
          echo "EOF" >> $GITHUB_ENV
          
          echo "current_version=$CURRENT_VERSION" >> $GITHUB_ENV
          echo "previous_version=$PREVIOUS_VERSION" >> $GITHUB_ENV

      - name: Update Release
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          # Combine latest release notes with comparison URL
          REPO_URL="${GITHUB_SERVER_URL}/${GITHUB_REPOSITORY}"
          COMPARE_URL="${REPO_URL}/compare/v${previous_version}...v${current_version}"
          
          BODY="# Latest Changes
          ${LATEST}
          
          # Full Changelog
          [Compare v${previous_version}...v${current_version}](${COMPARE_URL})"
          
          # Get release ID
          RELEASE_ID=$(gh api \
            --method GET \
            -H "Accept: application/vnd.github+json" \
            /repos/${{ github.repository }}/releases/tags/${{ github.event.release.tag_name }} \
            | jq .id)
          
          # Update release notes
          gh api \
            --method PATCH \
            -H "Accept: application/vnd.github+json" \
            /repos/${{ github.repository }}/releases/$RELEASE_ID \
            -f body="$BODY"