# SPDX-FileCopyrightText: Copyright (C) swift Project Community / Contributors
# SPDX-License-Identifier: CC0-1.0

name: Pull request validation

on:
  pull_request:

concurrency:
  group: pr-${{ github.event.pull_request.number }}
  cancel-in-progress: true

env:
  qt_version:    &qt_version 6.11.1

jobs:
  checks:
    uses: ./.github/workflows/reusable_checks.yml

  doxygen:
    uses: ./.github/workflows/reusable_doxygen.yml
    with:
      upload_doxygen: false
      qt_version: *qt_version

  changelog:
    runs-on: ubuntu-24.04
    permissions:
      pull-requests: read
      issues: read
      contents: read

    steps:
      - name: Checkout repository
        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0
        with:
          fetch-depth: '0'
      - name: Check for CHANGELOG or no-changelog label
        env:
          GH_TOKEN: ${{ github.token }}
        run: |
          set -e

          BASE_SHA="${{ github.event.pull_request.base.sha }}"
          HEAD_SHA="${{ github.event.pull_request.head.sha }}"

          echo "Checking changed files..."

          if git diff --name-only "$BASE_SHA" "$HEAD_SHA" | grep -qx "CHANGELOG.md"; then
            echo "✅ CHANGELOG.md was modified."
            exit 0
          fi

          echo "CHANGELOG.md not modified. Checking labels..."

          LABELS=$(gh api \
            repos/${{ github.repository }}/issues/${{ github.event.pull_request.number }}/labels \
            --jq '.[].name')

          if echo "$LABELS" | grep -qx "no-changelog"; then
            echo "✅ no-changelog label found."
            exit 0
          fi

          echo "::error::This PR must either modify CHANGELOG.md or have the 'no-changelog' label."
          exit 1

  postBuild: # just a job with the same name as in the merge queue build to satisfy requirements
    runs-on: ubuntu-latest
    needs: [checks, doxygen, changelog]
    steps:
      - run: true