css/.github/workflows/welcome.yml

name: Welcome
on:
  pull_request:

jobs:
  release-template:
    if: ${{ github.head_ref == 'changeset-release/main' }}
    runs-on: ubuntu-latest
    steps:
      - name: Checkout repository
        uses: actions/checkout@v2

      - name: Set up Node.js
        uses: actions/setup-node@v2
        with:
          node-version: 14.x

      - name: Get or Create Comment
        uses: actions/github-script@v4.0.2
        with:
          github-token: ${{ secrets.GITHUB_TOKEN }}
          script: |
            const fs = require('fs')
            const body = await fs.readFileSync('.github/release_template.md', 'utf8')
            const result = await github.issues.listComments({
              issue_number: context.issue.number,
              owner: context.repo.owner,
              repo: context.repo.repo
            });
            console.log(result.data)
            const primerComments = result.data.filter(c => c.user.login == 'github-actions[bot]')
            if (!primerComments.length) {
              await github.issues.createComment({
                issue_number: context.issue.number,
                owner: context.repo.owner,
                repo: context.repo.repo,
                body: body.replace('{{PR_AUTHOR}}', context.payload.sender.login)
              })
            }            

  bundle-stats:
    needs: release-template
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v2
      - uses: actions/setup-node@v2
        with:
          node-version: 14
      - run: yarn
      - run: yarn pretest
      - name: Reporting bundle sizes
        uses: primer/comment-token-update@main
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          GITHUB_USER: github-actions[bot]
        with:
          comment-token: 'bundle_table'
          script: |
            bundles=$(script/bundle-size-report.js)
            if [[ $bundles ]]; then
              echo "### Bundles with a size change since [latest release](https://github.com/primer/css/releases/latest)"
              echo ""
              echo "$bundles"
            fi            

      - name: Reporting selector diffs
        uses: primer/comment-token-update@main
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
          GITHUB_USER: github-actions[bot]
        with:
          comment-token: 'diff_report'
          script: |
            diff=$(script/selector-diff-report)
            if [[ $diff ]]; then
              echo "### Selectors added/removed since [latest release](https://github.com/primer/css/releases/latest)"
              echo ""
              echo "\`\`\`diff"
              echo "$diff"
              echo "\`\`\`"
            fi            

  label-release:
    name: Semantic Version Label
    runs-on: ubuntu-latest
    steps:
      - uses: actions/github-script@v4.0.2
        id: version-result
        with:
          github-token: "${{ secrets.GITHUB_TOKEN }}"
          result-encoding: string
          script: |
            const diff_url = context.payload.pull_request.diff_url
            const result = await github.request(diff_url)
            const match = [...result.data.matchAll(/^\+['"]@primer\/css['"]:\s(patch|minor|major)/m)]
            if (match && match[0]) {
              return match[0][1]
            }            

      - uses: actions/github-script@v4.0.2
        env:
          RELEASE: ${{ steps.version-result.outputs.result }}
        with:
          github-token: ${{secrets.GITHUB_TOKEN}}
          script: |
            if (process.env.RELEASE == 'undefined') { return }
            const issue = await github.issues.get({
              owner: context.repo.owner,
              repo: context.repo.repo,
              issue_number: context.issue.number
            })
            const currentLabels = issue.data.labels.map( l => l.name)
            const newLabel = `${process.env.RELEASE} release`
            if (!currentLabels.includes(newLabel)) {
              const otherReleaseLabels = currentLabels.filter( l => l.endsWith(' release'))
              if (otherReleaseLabels.length) {
                github.issues.removeLabel({
                  issue_number: context.issue.number,
                  owner: context.repo.owner,
                  repo: context.repo.repo,
                  name: [otherReleaseLabels]
                })
              }
              github.issues.addLabels({
                issue_number: context.issue.number,
                owner: context.repo.owner,
                repo: context.repo.repo,
                labels: [newLabel]
              })
            }