name: AI Release Notes

# Generate AI-powered release notes on new releases
# Analyzes commits since last release and generates structured notes
# Estimated cost: ~$1.50/release

on:
  release:
    types: [created]
  workflow_dispatch:
    inputs:
      tag:
        description: "Release tag to generate notes for (e.g. v1.2.0)"
        required: true
        type: string

concurrency:
  group: release-notes
  cancel-in-progress: false

jobs:
  generate:
    name: Generate Release Notes
    runs-on: ubuntu-latest
    permissions:
      contents: write
    env:
      RELEASE_TAG: ${{ github.event.release.tag_name || inputs.tag }}

    steps:
      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
        with:
          fetch-depth: 0

      - name: Validate required secrets
        env:
          HAS_API_KEY: ${{ secrets.ANTHROPIC_API_KEY != '' }}
        run: |
          if [ "$HAS_API_KEY" != "true" ]; then
            echo "::error::ANTHROPIC_API_KEY not configured"
            exit 1
          fi
          echo "Required secrets present"

      - name: Validate release tag format
        run: |
          if ! echo "$RELEASE_TAG" | grep -qE '^v?[0-9]+\.[0-9]+'; then
            echo "::error::Invalid release tag format: $RELEASE_TAG (expected vX.Y.Z or X.Y.Z)"
            exit 1
          fi

      - name: Get previous release tag
        id: prev_tag
        run: |
          PREV_TAG=$(git tag --sort=-v:refname | grep -Fxv "$RELEASE_TAG" | head -1)
          if [ -z "$PREV_TAG" ]; then
            PREV_TAG=$(git rev-list --max-parents=0 HEAD | head -1)
            echo "No previous tag found, using initial commit: $PREV_TAG"
          fi
          echo "prev_tag=$PREV_TAG" >> $GITHUB_OUTPUT
          echo "Previous release: $PREV_TAG"

      - name: Generate Release Notes
        uses: anthropics/claude-code-action@9db782c3a17ef2bfc274cd17411bc3e0a5ba1345 # v1
        with:
          github_token: ${{ secrets.GITHUB_TOKEN }}
          anthropic_api_key: ${{ secrets.ANTHROPIC_API_KEY }}
          prompt: |
            Generate release notes for ODS release ${{ env.RELEASE_TAG }}.

            ## Instructions

            1. Get the commit log since the previous release:
               `git log ${{ steps.prev_tag.outputs.prev_tag }}..${{ env.RELEASE_TAG }} --oneline --no-merges`

            2. Also check the full diff for a high-level understanding:
               `git diff --stat ${{ steps.prev_tag.outputs.prev_tag }}..${{ env.RELEASE_TAG }}`

            3. Categorize changes into these sections:
               - **New Features**: New functionality added
               - **Improvements**: Enhancements to existing features
               - **Bug Fixes**: Issues resolved
               - **Security**: Security-related changes
               - **CI/CD**: Pipeline and automation changes
               - **Documentation**: Doc updates
               - **Dependencies**: Dependency updates
               - **Breaking Changes**: Changes that may affect existing users

            4. Update the release body using:
               ```
               gh release edit ${{ env.RELEASE_TAG }} --notes "$(cat <<'NOTES'
               <your generated notes here>
               NOTES
               )"
               ```

            ## Format

            Use this format for the release notes:
            ```markdown
            ## What's Changed

            ### New Features
            - Feature description (#PR_NUMBER)

            ### Improvements
            - Improvement description (#PR_NUMBER)

            ### Bug Fixes
            - Fix description (#PR_NUMBER)

            [... other sections as applicable ...]

            ### Contributors
            - @username

            **Full Changelog**: https://github.com/${{ github.repository }}/compare/${{ steps.prev_tag.outputs.prev_tag }}...${{ env.RELEASE_TAG }}
            ```

            Only include sections that have actual changes. Skip empty sections.
          claude_args: >-
            --allowedTools
            "Bash(git log *),Bash(git diff *),Bash(gh release edit *),Bash(gh pr list *),Read,Glob,Grep"
            --max-turns 10