copyPasteDetection.yml

# github actions: https://docs.github.com/en/actions/use-cases-and-examples/building-and-testing/building-and-testing-nodejs
# setup-node: https://github.com/actions/setup-node

name: Copy-Paste Detection

on:
    pull_request:
        branches: [master, feature/*, staging]
        # Default = opened + synchronize + reopened.
        # We also want "edited" so that lint-commits runs when PR title is updated.
        # https://docs.github.com/en/actions/writing-workflows/choosing-when-your-workflow-runs/events-that-trigger-workflows#pull_request
        types:
            - edited
            - opened
            - reopened
            - synchronize

# Cancel old jobs when a pull request is updated.
concurrency:
    group: ${{ github.head_ref || github.run_id }}
    cancel-in-progress: true

jobs:
    jscpd:
        runs-on: ubuntu-latest
        strategy:
            matrix:
                node-version: [18.x]
        env:
            NODE_OPTIONS: '--max-old-space-size=8192'

        steps:
            - uses: actions/checkout@v4
              with:
                  fetch-depth: 0

            - name: Use Node.js ${{ matrix.node-version }}
              uses: actions/setup-node@v4
              with:
                  node-version: ${{ matrix.node-version }}

            - name: Fetch fork upstream
              run: |
                  git remote add forkUpstream https://github.com/${{ github.event.pull_request.head.repo.full_name }}  # URL of the fork
                  git fetch forkUpstream  # Fetch fork

            - name: Determine base and target branches for comparison.
              run: |
                  echo "CURRENT_BRANCH=${{ github.head_ref }}" >> $GITHUB_ENV
                  echo "TARGET_BRANCH=${{ github.event.pull_request.base.ref }}" >> $GITHUB_ENV
            - run: git diff --name-only origin/$TARGET_BRANCH forkUpstream/$CURRENT_BRANCH > diff_output.txt
            - run: |
                  npm install -g jscpd

            - run: jscpd --config "$GITHUB_WORKSPACE/.github/workflows/jscpd.json"

            - if: always()
              uses: actions/upload-artifact@v4
              with:
                  name: unfiltered-jscpd-report
                  path: ./jscpd-report.json

            - name: Filter jscpd report for changed files
              run: |
                  if [ ! -f ./jscpd-report.json ]; then
                    echo "jscpd-report.json not found"
                    exit 1
                  fi
                  echo "Filtering jscpd report for changed files..."
                  CHANGED_FILES=$(jq -R -s -c 'split("\n")[:-1]' diff_output.txt)
                  echo "Changed files: $CHANGED_FILES"
                  jq --argjson changed_files "$CHANGED_FILES" '
                  .duplicates | map(select(
                      (.firstFile?.name as $fname | $changed_files | any(. == $fname)) or
                      (.secondFile?.name as $sname | $changed_files | any(. == $sname))
                  ))
                  ' ./jscpd-report.json > filtered-jscpd-report.json
                  cat filtered-jscpd-report.json

            - name: Check for duplicates
              run: |
                  if [ $(wc -l < ./filtered-jscpd-report.json) -gt 1 ]; then
                    echo "filtered_report_exists=true" >> $GITHUB_ENV
                  else
                    echo "filtered_report_exists=false" >> $GITHUB_ENV
                  fi
            - name: upload filtered report (if applicable)
              if: env.filtered_report_exists == 'true'
              uses: actions/upload-artifact@v4
              with:
                  name: filtered-jscpd-report
                  path: ./filtered-jscpd-report.json

            - name: Fail and log found duplicates.
              if: env.filtered_report_exists == 'true'
              run: |
                  cat ./filtered-jscpd-report.json
                  echo "Duplications found, failing the check."
                  exit 1