diff_generator.yml

name: Check diff between template and current state
on: [push]

jobs:
  generate-diff:
    runs-on: ${{ matrix.os }}
    strategy:
      matrix:
        os: [ubuntu-latest]
        node-version:
          - 20.x
    steps:
      - name: Checkout source branch
        uses: actions/checkout@v4
        with:
          repository: Informatievlaanderen/OSLOthema-template
          ref: standaardenregister
          path: source

      - name: Clone other repository
        uses: actions/checkout@v4
        with:
          # Dynamic reference to the active repository so that it works immediately when creating a new thema repo
          repository: ${{ github.repository }}
          ref: standaardenregister
          path:
            target
          # Extra step to debug the file structure
      - name: List file structure of source dir
        shell: bash
        run: |
          ls source
      - name: List file structure of target dir
        shell: bash
        run: |
          ls target
      - name: See which files are unchanged between template and repository
        id: generate-diff
        shell: bash
        # add a rule to ignore .git folder and the README
        run: |
          identical_files=""
          for file in $(find source -type f | grep -v -e ".git" -e "README"); do
            target_file=${file/source/target}
            if [ -f "$target_file" ]; then
              diff_output=$(diff -b "$file" "$target_file" | cat -t || true)
              if ! [[ $diff_output == *"differ"* ]]; then
                identical_files+="- ${file##*/}\n"
              fi
            fi
          done
          echo "Identical files:"
          echo -e "$identical_files"
          echo "# Summary" >> $GITHUB_STEP_SUMMARY
          echo "## Identical files compared to the template" >> $GITHUB_STEP_SUMMARY
          echo -e "$identical_files" >> $GITHUB_STEP_SUMMARY
          if [ -n "$identical_files" ]; then
            echo "Error: There are identical files between the template and the repository." >> $GITHUB_STEP_SUMMARY
            exit 1
          fi