.github/workflows/sync-electron.yml

name: Sync master → electron

on:
  push:
    branches: [master]
  workflow_dispatch:

concurrency:
  group: sync-electron
  cancel-in-progress: false

permissions:
  actions: write
  contents: write
  issues: write

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

      - name: Merge master into electron
        run: |
          git config user.name "github-actions[bot]"
          git config user.email "github-actions[bot]@users.noreply.github.com"

          git checkout electron
          git merge origin/master --no-edit || {
            # Conflict — abort and create issue
            git merge --abort
            echo "CONFLICT=true" >> "$GITHUB_ENV"
          }

      - name: Auto bump + tag if new commits
        if: env.CONFLICT != 'true'
        run: |
          # Find last version tag
          LAST_TAG=$(git describe --tags --abbrev=0 --match "v*" 2>/dev/null || echo "")
          if [ -z "$LAST_TAG" ]; then
            echo "No previous tag found, skipping auto-bump"
            echo "BUMP=false" >> "$GITHUB_ENV"
            exit 0
          fi

          # Check for new non-merge commits since last tag
          NEW_COMMITS=$(git log "${LAST_TAG}..HEAD" --no-merges --oneline | wc -l)
          if [ "$NEW_COMMITS" -eq 0 ]; then
            echo "No new non-merge commits since $LAST_TAG, skipping bump"
            echo "BUMP=false" >> "$GITHUB_ENV"
            exit 0
          fi

          echo "Found $NEW_COMMITS new commit(s) since $LAST_TAG"

          # Parse current version and bump patch
          CURRENT="${LAST_TAG#v}"
          IFS='.' read -r MAJOR MINOR PATCH <<< "$CURRENT"
          NEW_PATCH=$((PATCH + 1))
          NEW_VERSION="${MAJOR}.${MINOR}.${NEW_PATCH}"
          NEW_TAG="v${NEW_VERSION}"

          # Check tag doesn't already exist (concurrent protection)
          if git rev-parse "$NEW_TAG" >/dev/null 2>&1; then
            echo "Tag $NEW_TAG already exists, skipping"
            echo "BUMP=false" >> "$GITHUB_ENV"
            exit 0
          fi

          # Bump version in package.json
          node -e "
            const fs = require('fs');
            const pkg = JSON.parse(fs.readFileSync('package.json', 'utf-8'));
            pkg.version = '${NEW_VERSION}';
            fs.writeFileSync('package.json', JSON.stringify(pkg, null, 2) + '\n');
          "

          git add package.json
          git commit -m "chore: bump version to ${NEW_VERSION}"
          git tag -a "$NEW_TAG" -m "Release ${NEW_TAG}"

          echo "BUMP=true" >> "$GITHUB_ENV"
          echo "NEW_TAG=$NEW_TAG" >> "$GITHUB_ENV"
          echo "NEW_VERSION=$NEW_VERSION" >> "$GITHUB_ENV"
          echo "Bumped to $NEW_VERSION, tagged $NEW_TAG"

      - name: Sync version to master
        if: env.BUMP == 'true'
        run: |
          git checkout master
          node -e "
            const fs = require('fs');
            const pkg = JSON.parse(fs.readFileSync('package.json', 'utf-8'));
            pkg.version = process.env.NEW_VERSION;
            fs.writeFileSync('package.json', JSON.stringify(pkg, null, 2) + '\n');
          "
          git add package.json
          git commit -m "chore: sync version to ${NEW_VERSION} [skip ci]"
          git checkout electron

      - name: Push electron + master + tags
        if: env.CONFLICT != 'true'
        run: |
          if [ "$BUMP" = "true" ]; then
            git push origin electron master --follow-tags
          else
            git push origin electron
          fi

      - name: Trigger release workflow
        if: env.BUMP == 'true'
        run: gh workflow run release.yml -f tag="$NEW_TAG" --ref electron
        env:
          GH_TOKEN: ${{ github.token }}

      - name: Create issue on conflict
        if: env.CONFLICT == 'true'
        run: |
          # Check for existing open issue to avoid duplicates
          EXISTING=$(gh issue list --label "sync-conflict" --state open --limit 1 --json number -q '.[0].number')
          if [ -n "$EXISTING" ]; then
            echo "Issue #$EXISTING already open, skipping"
            exit 0
          fi
          gh issue create \
            --title "electron 分支合并冲突需手动解决" \
            --label "sync-conflict" \
            --body "$(cat <<'EOF'
          \`master\` → \`electron\` 自动合并失败，需要手动解决冲突。

          ```bash
          git checkout electron
          git merge master
          # 解决冲突（通常是 CHANGELOG.md）
          git add .
          git commit
          git push origin electron
          ```

          触发 commit: ${{ github.sha }}
          EOF
          )"
        env:
          GH_TOKEN: ${{ github.token }}