github_release.yml

name: Release

on:
  push:
    tags:
      - "v[0-9]+.[0-9]+.[0-9]+"
  workflow_dispatch:
    inputs:
      bump:
        description: "Version bump type (leave empty to auto-detect from commits)"
        required: false
        type: choice
        options:
          - auto
          - major
          - minor
          - patch
        default: auto

permissions:
  contents: write

jobs:
  release:
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:
          fetch-depth: 0

      - name: Determine version
        id: version
        run: |
          if [ "${{ github.event_name }}" = "push" ]; then
            TAG="${GITHUB_REF#refs/tags/}"
            VERSION="${TAG#v}"
            echo "version=${VERSION}" >> "$GITHUB_OUTPUT"
            echo "tag=${TAG}" >> "$GITHUB_OUTPUT"
            exit 0
          fi

          LATEST_STABLE=$(git tag --sort=-v:refname | grep -E '^v[0-9]+\.[0-9]+\.[0-9]+$' | head -1)
          BUMP="${{ inputs.bump }}"

          if [ "$BUMP" = "auto" ] || [ -z "$BUMP" ]; then
            if [ -z "$LATEST_STABLE" ]; then
              COMMITS=$(git log --pretty=format:"%s%n%b" HEAD)
            else
              COMMITS=$(git log --pretty=format:"%s%n%b" "${LATEST_STABLE}..HEAD")
            fi

            BUMP="patch"
            if echo "$COMMITS" | grep -qE '^feat(\(.+\))?!:|^fix(\(.+\))?!:|^refactor(\(.+\))?!:|^[a-z]+(\(.+\))?!:|BREAKING CHANGE:'; then
              BUMP="major"
            elif echo "$COMMITS" | grep -qE '^feat(\(.+\))?:'; then
              BUMP="minor"
            fi
          fi

          if [ -z "$LATEST_STABLE" ]; then
            MAJOR=0; MINOR=1; PATCH=0
          else
            VERSION="${LATEST_STABLE#v}"
            IFS='.' read -r MAJOR MINOR PATCH <<< "$VERSION"
          fi

          case "$BUMP" in
            major)
              MAJOR=$((MAJOR + 1)); MINOR=0; PATCH=0
              ;;
            minor)
              MINOR=$((MINOR + 1)); PATCH=0
              ;;
            patch)
              PATCH=$((PATCH + 1))
              ;;
          esac

          NEXT_VERSION="${MAJOR}.${MINOR}.${PATCH}"
          TAG="v${NEXT_VERSION}"

          echo "version=${NEXT_VERSION}" >> "$GITHUB_OUTPUT"
          echo "tag=${TAG}" >> "$GITHUB_OUTPUT"

      - name: Create and push tag (manual dispatch)
        if: github.event_name == 'workflow_dispatch'
        run: |
          git tag "${{ steps.version.outputs.tag }}"
          git push origin "${{ steps.version.outputs.tag }}"
          echo "Tag pushed. The release will be created by the tag-push trigger."

      - name: Generate changelog
        if: github.event_name == 'push'
        id: changelog
        run: |
          PREVIOUS_TAG=$(git tag --sort=-v:refname | grep -E '^v[0-9]+\.[0-9]+\.[0-9]+$' | head -2 | tail -1)
          if [ -z "$PREVIOUS_TAG" ]; then
            CHANGELOG=$(git log --pretty=format:"- %s (%h)" HEAD)
          else
            CHANGELOG=$(git log --pretty=format:"- %s (%h)" "${PREVIOUS_TAG}..HEAD")
          fi
          {
            echo "changelog<<EOF"
            echo "$CHANGELOG"
            echo "EOF"
          } >> "$GITHUB_OUTPUT"

      - name: Create GitHub release
        if: github.event_name == 'push'
        uses: softprops/action-gh-release@v2
        with:
          tag_name: ${{ steps.version.outputs.tag }}
          name: ${{ steps.version.outputs.tag }}
          body: |
            ## What's Changed

            ${{ steps.changelog.outputs.changelog }}
          draft: false
          prerelease: false