main.yml

name: CI

on: [push, pull_request]

jobs:

  lint_newlines:

    name: Lint newlines
    runs-on: ubuntu-latest

    permissions:
      contents: read
      pull-requests: write

    steps:

      - name: Checkout
        uses: actions/checkout@v4

      - name: Run ShellCheck
        uses: ludeeus/action-shellcheck@2.0.0

      - name: Lint newlines
        id: lint_newlines
        uses: fionn/newline-linter@master

      - name: Comment on PR
        uses: actions/github-script@v7
        if: |
          failure() && steps.lint_newlines.outcome == 'failure'
          && github.event_name == 'pull_request' && github.event.action == 'opened'
        with:
          script: |
            github.rest.issues.createComment({
              owner: context.repo.owner,
              repo: context.repo.repo,
              issue_number: context.issue.number,
              body: `Some files do not end in newlines. \
                See [_No Newline at End of File_](https://thoughtbot.com/blog/no-newline-at-end-of-file) \
                for how to fix your editor configuration.`
            })