name: Release

on:
  push:
    tags: ["v*"]
  workflow_dispatch:
    inputs:
      version:
        # This input isn't actually used as an input, but it's a reminder that
        # this workflow can only automatically push patch versions.
        # This is because often minor versions require human intervention, so
        # it's safer if we force ourselves to always create them locally.
        description: ⚠️ This workflow can only automatically release patch versions
        required: true
        default: patch

jobs:
  log-updates:
    name: Log packages to publish
    runs-on: ubuntu-latest
    steps:
      - name: Checkout the new tag
        uses: actions/checkout@v2
        with:
          fetch-depth: 0
      - name: This release will publish the following packages
        run: |
          if [ "${{ github.event_name }}" = "workflow_dispatch" ]; then
            yarn release-tool version --dry patch
          else
            git diff --name-only HEAD^..HEAD
          fi;

  git-version:
    name: Create git tag and commit
    runs-on: ubuntu-latest
    needs: log-updates
    if: github.event_name == 'workflow_dispatch'
    outputs:
      branch: ${{ steps.push.outputs.branch }}
    steps:
      - uses: actions/checkout@v2
        with:
          fetch-depth: 0

      - name: Set @babel-bot as committer
        run: |
          git config user.name "Babel Bot"
          git config user.email "babel-bot@users.noreply.github.com"

      - name: Create new version
        run: yarn release-tool version -f @babel/standalone --yes patch

      - name: Push to GitHub
        id: push
        run: |
          branch="release/temp/$(git describe --abbrev=0)"
          echo $branch
          echo "::set-output name=branch::$branch"

          git push "https://babel-bot:${{ secrets.GITHUB_TOKEN }}@github.com/${GITHUB_REPOSITORY}.git" HEAD:"$branch" --follow-tags

  npm-release:
    name: Build, Test and Publish
    runs-on: ubuntu-latest
    needs: git-version
    environment: npm
    # The default condition is success(), but this is false when one of the previous jobs is skipped
    if: |
      always() &&
      (needs.git-version.result == 'success' || needs.git-version.result == 'skipped')
    steps:
      - uses: actions/checkout@v2
        with:
          fetch-depth: 0
      - name: Checkout the temporary branch
        if: needs.git-version.result == 'success'
        run: git checkout ${{ needs.git-version.outputs.branch }}

      - name: Build and Test
        run: make prepublish

      - name: Publish to npm
        run: yarn release-tool publish --yes
        env:
          YARN_NPM_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}

  github-release:
    name: Create GitHub release draft
    runs-on: ubuntu-latest
    needs: git-version
    # The default condition is success(), but this is false when one of the previous jobs is skipped
    if: |
      always() &&
      (needs.git-version.result == 'success' || needs.git-version.result == 'skipped')
    outputs:
      is-main: ${{ steps.is-main.outputs.result == 1 }}
      changelog: ${{ steps.changelog.outputs.changelog }}
      version: ${{ steps.tags.outputs.new }}
    steps:
      - uses: actions/checkout@v2
        with:
          fetch-depth: 0

      - name: Check if releasing from main
        id: is-main
        uses: babel/actions/ref-matches-branch@v2
        with:
          name: main

      - name: Checkout the temporary branch
        if: needs.git-version.result == 'success'
        run: git checkout ${{ needs.git-version.outputs.branch }}

      - name: Get tag info
        id: tags
        uses: babel/actions/get-release-tags@v2

      - name: Generate the changelog
        id: changelog
        uses: babel/actions/generate-lerna-changelog@v2
        with:
          from: ${{ steps.tags.outputs.old }}
          to: ${{ steps.tags.outputs.new }}
        env:
          GITHUB_AUTH: ${{ secrets.GITHUB_TOKEN }}

      - name: Create a draft GitHub release
        uses: babel/actions/publish-github-release@v2
        with:
          tag: ${{ steps.tags.outputs.new }}
          changelog: ${{ steps.changelog.outputs.changelog }}
          token: ${{ secrets.BOT_TOKEN }}

  github-push:
    name: Push release commit to "main"
    runs-on: ubuntu-latest
    needs: [npm-release, github-release, git-version]
    # The default condition is success(), but this is false when one of the previous jobs is skipped
    if: |
      always() &&
      needs.npm-release.result == 'success' &&
      needs.github-release.result == 'success' &&
      needs.github-release.outputs.is-main
    steps:
      - uses: actions/checkout@v2
        with:
          fetch-depth: 0
      - name: Checkout the temporary branch
        if: needs.git-version.result == 'success'
        run: git checkout ${{ needs.git-version.outputs.branch }}

      - name: Update CHANGELOG.md
        uses: babel/actions/update-changelog@v2
        with:
          changelog: ${{ needs.github-release.outputs.changelog }}

      - name: Commit CHANGELOG.md
        run: |
          git add CHANGELOG.md
          git -c user.name="Babel Bot" -c user.email="babel-bot@users.noreply.github.com" \
            commit -m "Add ${{ needs.github-release.outputs.version }} to CHANGELOG.md [skip ci]" --no-verify --quiet

      - name: Push to GitHub
        run: |
          git push "https://babel-bot:${{ secrets.GITHUB_TOKEN }}@github.com/${GITHUB_REPOSITORY}.git" HEAD:main --follow-tags

      - name: Delete temporary branch from GitHub
        if: needs.git-version.result == 'success'
        run:
          git push "https://babel-bot:${{ secrets.GITHUB_TOKEN }}@github.com/${GITHUB_REPOSITORY}.git" :${{ needs.git-version.outputs.branch }}