# Part of the Carbon Language project, under the Apache License v2.0 with LLVM
# Exceptions. See /LICENSE for license information.
# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception

name: prek

on:
  pull_request:
  merge_group:
  push:
    branches: [trunk]

permissions:
  contents: read # For actions/checkout.

jobs:
  prek:
    runs-on: ubuntu-22.04
    steps:
      - name: Harden Runner
        uses: step-security/harden-runner@58077d3c7e43986b6b15fba718e8ea69e387dfcc # v2.15.1
        with:
          egress-policy: block
          # When adding endpoints, see README.md.
          # prettier-ignore
          allowed-endpoints: >
            *.blob.storage.azure.net:443
            *.githubapp.com:443
            *.sourceforge.net:443
            api.github.com:443
            api.ipify.org:443
            bcr.bazel.build:443
            downloads.sourceforge.net:443
            files.pythonhosted.org:443
            github.com:443
            go.dev:443
            mirror.bazel.build:443
            mirrors.kernel.org:443
            nodejs.org:443
            oauth2.googleapis.com:443
            objects.githubusercontent.com:443
            pypi.org:443
            raw.githubusercontent.com:443
            registry.npmjs.org:443
            release-assets.githubusercontent.com:443
            releases.astral.sh:443
            releases.bazel.build:443
            storage.googleapis.com:443
            uploads.github.com:443
            www.googleapis.com:443

      - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
        with:
          persist-credentials: false

      # Ensure LLVM is set up consistently.
      - uses: ./.github/actions/build-setup-common
        with:
          matrix_runner: ubuntu-22.04
          remote_cache_upload: '--remote_upload_local_results=false'

      - uses: j178/prek-action@01345c78b7de7d79edf368729212760396ba9345 # v2

      # We want to automatically create github suggestions for prek file
      # changes for a pull request. But `pull_request` actions never have write
      # permissions to the repository, so we create the suggestions in a separate
      # privileged `workflow_run` action in prek_suggestions.yaml. Here,
      # we upload the diffs and event configuration to an artifact for use by
      # that action.
      - name: Collect prek output
        if: failure()
        run: |
          mkdir -p prek-output
          git diff > prek-output/diff
          cp $GITHUB_EVENT_PATH prek-output/event
      - uses: actions/upload-artifact@bbbca2ddaa5d8feaa63e36b76fdaad77386f024f # v7.0.0
        if: failure()
        with:
          name: prek output
          path: prek-output/*