release-pr.yml

name: Release PR

on:
  push:
    branches: [dev]

permissions:
  contents: read
  pull-requests: write

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

      - name: Check for changes
        id: check
        run: |
          COMMIT_COUNT=$(git rev-list --count origin/main..origin/dev 2>/dev/null || echo "0")
          echo "commit_count=$COMMIT_COUNT" >> "$GITHUB_OUTPUT"
          if [ "$COMMIT_COUNT" -eq 0 ]; then
            echo "No commits between main and dev. Skipping."
          fi

      - name: Parse commits and generate body
        if: steps.check.outputs.commit_count != '0'
        id: generate
        run: |
          COMMITS=$(git log origin/main..origin/dev --no-merges --format="%s")

          FEAT=""
          FIX=""
          REFACTOR=""
          STYLE=""
          DOCS=""
          CHORE=""

          while IFS= read -r line; do
            [ -z "$line" ] && continue

            # prefix 제거하여 메시지 추출
            msg=$(echo "$line" | sed 's/^[a-z]*\(([^)]*)\)\?[!]\?: *//')

            case "$line" in
              feat:*|feat\(*)       FEAT="${FEAT}- ${msg}"$'\n' ;;
              fix:*|fix\(*)         FIX="${FIX}- ${msg}"$'\n' ;;
              refactor:*|refactor\(*) REFACTOR="${REFACTOR}- ${msg}"$'\n' ;;
              style:*|style\(*)     STYLE="${STYLE}- ${msg}"$'\n' ;;
              docs:*|docs\(*)       DOCS="${DOCS}- ${msg}"$'\n' ;;
              chore:*|chore\(*)     CHORE="${CHORE}- ${msg}"$'\n' ;;
              *)                    CHORE="${CHORE}- ${line}"$'\n' ;;
            esac
          done <<< "$COMMITS"

          # 버전 계산: 최근 RELEASE 커밋에서 현재 버전 추출
          CURRENT_VERSION=$(git log --all --oneline --grep="\[RELEASE\]" --format="%s" | head -1 | sed 's/.*v\([0-9]*\.[0-9]*\.[0-9]*\).*/\1/')
          if [ -z "$CURRENT_VERSION" ]; then
            CURRENT_VERSION="0.0.0"
          fi

          IFS='.' read -r MAJOR MINOR PATCH <<< "$CURRENT_VERSION"

          if [ -n "$FEAT" ]; then
            MINOR=$((MINOR + 1))
            PATCH=0
          else
            PATCH=$((PATCH + 1))
          fi

          NEXT_VERSION="v${MAJOR}.${MINOR}.${PATCH}"
          echo "next_version=$NEXT_VERSION" >> "$GITHUB_OUTPUT"

          # PR 본문 생성
          BODY="## [RELEASE] $NEXT_VERSION"
          NEWLINE=$'\n'

          if [ -n "$FEAT" ]; then
            BODY="${BODY}${NEWLINE}${NEWLINE}### 기능${NEWLINE}${FEAT}"
          fi

          if [ -n "$FIX" ]; then
            BODY="${BODY}${NEWLINE}${NEWLINE}### 버그 수정${NEWLINE}${FIX}"
          fi

          if [ -n "$REFACTOR" ]; then
            BODY="${BODY}${NEWLINE}${NEWLINE}### 리팩토링${NEWLINE}${REFACTOR}"
          fi

          if [ -n "$STYLE" ]; then
            BODY="${BODY}${NEWLINE}${NEWLINE}### 스타일${NEWLINE}${STYLE}"
          fi

          if [ -n "$DOCS" ]; then
            BODY="${BODY}${NEWLINE}${NEWLINE}### 문서${NEWLINE}${DOCS}"
          fi

          if [ -n "$CHORE" ]; then
            BODY="${BODY}${NEWLINE}${NEWLINE}### 기타${NEWLINE}${CHORE}"
          fi

          # multiline output
          {
            echo "body<<BODY_EOF"
            echo "$BODY"
            echo "BODY_EOF"
          } >> "$GITHUB_OUTPUT"

      - name: Create or update PR
        if: steps.check.outputs.commit_count != '0'
        env:
          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        run: |
          NEXT_VERSION="${{ steps.generate.outputs.next_version }}"
          TITLE="[RELEASE] $NEXT_VERSION"

          # 기존 열린 PR 확인
          EXISTING_PR=$(gh pr list --base main --head dev --state open --json number --jq '.[0].number // empty')

          if [ -n "$EXISTING_PR" ]; then
            echo "Updating existing PR #$EXISTING_PR"
            gh pr edit "$EXISTING_PR" --title "$TITLE" --body "${{ steps.generate.outputs.body }}"
          else
            echo "Creating new PR"
            gh pr create --base main --head dev --title "$TITLE" --body "${{ steps.generate.outputs.body }}"
          fi