triage-unallowed-contributions.yml

name: Check unallowed file changes

# **What it does**: If someone changes some files in the open repo, we prevent the pull request from merging.
# **Why we have it**: Some files can only be changed in the internal repository for security and workflow reasons.
# **Who does it impact**: Open source contributors.

on:
  # Needed in lieu of `pull_request` so that PRs from a fork can be notified of unallowed changes.
  pull_request_target:

permissions:
  contents: read
  pull-requests: write

jobs:
  triage:
    if: >-
      ${{
        github.repository == 'github/docs' &&
        github.event.pull_request.user.login != 'docs-bot' &&
        github.event.pull_request.user.login != 'dependabot[bot]'
      }}
    runs-on: ubuntu-latest
    steps:
      - name: Check out repo
        uses: actions/checkout@b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1

      - name: Get files changed
        uses: dorny/paths-filter@0bc4621a3135347011ad047f9ecf449bf72ce2bd
        id: filter
        with:
          # Base branch used to get changed files
          base: 'main'

          # Enables setting an output in the format in `${FILTER_NAME}_files
          # with the names of the matching files formatted as JSON array
          list-files: json

          # Returns list of changed files matching each filter
          filters: 'src/workflows/unallowed-contribution-filters.yml'

      - name: Set up Node and dependencies
        if: ${{ steps.filter.outputs.notAllowed || steps.filter.outputs.contentTypes}}
        uses: ./.github/actions/node-npm-setup

      # When there are changes to files we can't accept, leave a comment
      # explaining this to the PR author
      - name: "Comment about changes we can't accept"
        if: ${{ steps.filter.outputs.notAllowed || steps.filter.outputs.contentTypes}}
        run: npm run unallowed-contributions
        env:
          REPO_OWNER_AND_NAME: ${{ github.repository }}
          PR_NUMBER: ${{ github.event.number }}
          FILE_PATHS_NOT_ALLOWED: ${{ steps.filter.outputs.notAllowed_files }}
          CHANGED_FILE_PATHS: ${{ steps.filter.outputs.contentTypes_files }}
          ADDED_CONTENT_FILES: ${{ steps.filter.outputs.added_files }}
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}