release.yml

name: Release

on:
  push:
    branches: [main]

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

jobs:
  check-commit:
    runs-on: ubuntu-latest
    outputs:
      bump: ${{ steps.parse.outputs.bump }}
      description: ${{ steps.parse.outputs.description }}
    steps:
      - name: Parse commit message
        id: parse
        env:
          COMMIT_MSG: ${{ github.event.head_commit.message }}
        run: |
          if echo "$COMMIT_MSG" | grep -qE '^(feat|fix)(\(.*\))?!:'; then
            echo "bump=major" >> "$GITHUB_OUTPUT"
          elif echo "$COMMIT_MSG" | grep -qE '^feat(\(.*\))?:'; then
            echo "bump=minor" >> "$GITHUB_OUTPUT"
          elif echo "$COMMIT_MSG" | grep -qE '^fix(\(.*\))?:'; then
            echo "bump=patch" >> "$GITHUB_OUTPUT"
          else
            echo "bump=none" >> "$GITHUB_OUTPUT"
          fi

          DESCRIPTION=$(echo "$COMMIT_MSG" | sed -E 's/^(feat|fix)(\(.*\))?!?:[[:space:]]*//')
          echo "description<<EOF" >> "$GITHUB_OUTPUT"
          echo "$DESCRIPTION" >> "$GITHUB_OUTPUT"
          echo "EOF" >> "$GITHUB_OUTPUT"

  release:
    needs: check-commit
    if: needs.check-commit.outputs.bump != 'none'
    runs-on: ubuntu-latest
    permissions:
      contents: write
    steps:
      - name: Checkout
        uses: actions/checkout@v4
        with:
          fetch-depth: 0
          token: ${{ secrets.RELEASE_TOKEN }}

      - name: Set up Go
        uses: actions/setup-go@v5
        with:
          go-version-file: go.mod

      - name: Run tests
        run: go test ./... -v -count=1

      - name: Compute new version
        id: version
        run: |
          CURRENT=$(grep 'const VERSION =' internal/version.go | sed -E 's/.*"([^"]+)".*/\1/')
          IFS='.' read -r MAJOR MINOR PATCH <<< "$CURRENT"

          case "${{ needs.check-commit.outputs.bump }}" in
            major) MAJOR=$((MAJOR + 1)); MINOR=0; PATCH=0 ;;
            minor) MINOR=$((MINOR + 1)); PATCH=0 ;;
            patch) PATCH=$((PATCH + 1)) ;;
          esac

          NEW="$MAJOR.$MINOR.$PATCH"
          echo "version=$NEW" >> "$GITHUB_OUTPUT"
          echo "tag=V$NEW" >> "$GITHUB_OUTPUT"
          echo "previous_tag=V$CURRENT" >> "$GITHUB_OUTPUT"

      - name: Update internal/version.go
        run: |
          sed -i 's/const VERSION = "[^"]*"/const VERSION = "${{ steps.version.outputs.version }}"/' internal/version.go

      - name: Update CHANGE_LOGS.md
        env:
          NEW_VERSION: ${{ steps.version.outputs.version }}
          DESCRIPTION: ${{ needs.check-commit.outputs.description }}
        run: |
          python3 << 'PYEOF'
          import os
          version = os.environ['NEW_VERSION']
          description = os.environ['DESCRIPTION']
          with open('CHANGE_LOGS.md') as f:
              content = f.read()
          lines = content.split('\n')
          new_entry = [f'### Version {version}', f'> {description}', '']
          new_lines = lines[:2] + new_entry + lines[2:]
          with open('CHANGE_LOGS.md', 'w') as f:
              f.write('\n'.join(new_lines))
          PYEOF

      - name: Commit and tag
        run: |
          git config user.name "github-actions[bot]"
          git config user.email "github-actions[bot]@users.noreply.github.com"
          git add internal/version.go CHANGE_LOGS.md
          git commit -m "chore: release ${{ steps.version.outputs.tag }}"
          git tag ${{ steps.version.outputs.tag }}
          git push
          git push origin ${{ steps.version.outputs.tag }}

      - name: Build binaries
        run: |
          mkdir -p bin
          VERSION="${{ steps.version.outputs.version }}"
          GOOS=linux   go build -o bin/g-linux-v$VERSION
          GOOS=darwin  go build -o bin/g-macos-v$VERSION
          GOOS=windows go build -o bin/g-win-v$VERSION.exe

      - name: Generate release notes
        env:
          NEW_TAG: ${{ steps.version.outputs.tag }}
          PREV_TAG: ${{ steps.version.outputs.previous_tag }}
          DESCRIPTION: ${{ needs.check-commit.outputs.description }}
        run: |
          python3 << 'PYEOF'
          import os, re
          description = os.environ['DESCRIPTION']
          new_tag     = os.environ['NEW_TAG']
          prev_tag    = os.environ['PREV_TAG']

          with open('README.md') as f:
              readme = f.read()

          match = re.search(r'(^## Overview.*?)(?=^## Examples)', readme, re.MULTILINE | re.DOTALL)
          readme_section = match.group(1).rstrip() if match else ''

          notes = (
              f"## What's Changed\n"
              f"- {description}\n\n"
              f"**Full Changelog**: https://github.com/cyrus2281/gitBranchTool/compare/{prev_tag}...{new_tag}\n\n"
              f"---\n\n"
              f"{readme_section}\n"
          )

          with open('release_notes.md', 'w') as f:
              f.write(notes)
          PYEOF

      - name: Create GitHub release
        uses: softprops/action-gh-release@v2
        with:
          tag_name: ${{ steps.version.outputs.tag }}
          name: ${{ steps.version.outputs.tag }}
          body_path: release_notes.md
          files: |
            bin/g-linux-v${{ steps.version.outputs.version }}
            bin/g-macos-v${{ steps.version.outputs.version }}
            bin/g-win-v${{ steps.version.outputs.version }}.exe