release.yml

name: Release

on:
  workflow_dispatch:
    inputs:
      bump:
        description: 'Version bump type'
        required: true
        default: 'patch'
        type: choice
        options:
          - patch
          - minor
          - major

jobs:
  release:
    runs-on: ubuntu-latest
    permissions:
      contents: write
      pull-requests: read

    steps:
      - uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Determine versions
        id: version
        run: |
          LATEST=$(git tag --list 'v*.*.*' --sort=-v:refname | head -n 1)
          if [ -z "$LATEST" ]; then
            LATEST="v0.0.0"
          fi
          echo "previous=$LATEST" >> "$GITHUB_OUTPUT"

          # Strip 'v' prefix, split, bump, reassemble
          IFS='.' read -r MAJOR MINOR PATCH <<< "${LATEST#v}"
          case "${{ inputs.bump }}" in
            major) MAJOR=$((MAJOR + 1)); MINOR=0; PATCH=0 ;;
            minor) MINOR=$((MINOR + 1)); PATCH=0 ;;
            patch) PATCH=$((PATCH + 1)) ;;
          esac
          NEXT="v${MAJOR}.${MINOR}.${PATCH}"
          echo "next=$NEXT" >> "$GITHUB_OUTPUT"
          echo "major=v${MAJOR}" >> "$GITHUB_OUTPUT"
          echo "Releasing $NEXT (previous: $LATEST)"

      - name: Generate release notes
        id: notes
        uses: github/copilot-release-notes@v1
        with:
          base-ref: ${{ steps.version.outputs.previous }}
          head-ref: ${{ github.sha }}
        env:
          GITHUB_TOKEN: ${{ github.token }}
          COPILOT_GITHUB_TOKEN: ${{ secrets.COPILOT_GITHUB_TOKEN }}

      - name: Create GitHub Release
        uses: softprops/action-gh-release@v2
        with:
          tag_name: ${{ steps.version.outputs.next }}
          name: ${{ steps.version.outputs.next }}
          body: ${{ steps.notes.outputs.release-notes }}
          draft: true
          target_commitish: ${{ github.sha }}

      - name: Update major version tag
        run: |
          git tag -f "${{ steps.version.outputs.major }}" "${{ github.sha }}"
          git push origin "refs/tags/${{ steps.version.outputs.major }}" --force