email-check.yaml

name: "Check for private emails used in PRs"

on:
  pull_request_target:
    types:
      - opened

permissions:
  contents: read

jobs:
  validate_email:
    permissions:
      pull-requests: write
    runs-on: ubuntu-latest
    if: github.repository == 'llvm/llvm-project'
    steps:
      - name: Fetch LLVM sources
        uses: actions/checkout@v4
        with:
          ref: ${{ github.event.pull_request.head.sha }}

      - name: Extract author email
        id: author
        run: |
          git log -1
          echo "EMAIL=$(git show -s --format='%ae' HEAD~0)" >> $GITHUB_OUTPUT

      - name: Validate author email
        if: ${{ endsWith(steps.author.outputs.EMAIL, 'noreply.github.com')  }}
        uses: actions/github-script@v6
        env:
          EMAIL: ${{ steps.author.outputs.EMAIL }}
        with:
          script: |
            const { EMAIL } = process.env
            await github.rest.issues.createComment({
              issue_number: context.issue.number,
              owner: context.repo.owner,
              repo: context.repo.repo,
              body: `⚠️ We detected that you are using a GitHub private e-mail address to contribute to the repo.
              Please turn off [Keep my email addresses private](https://github.com/settings/emails) setting in your account.
              See [LLVM Discourse](https://discourse.llvm.org/t/hidden-emails-on-github-should-we-do-something-about-it) for more information.
            `})