Github action: Create jscpd.yml (#11738)

* Create jscpd.yml

* Update jscpd.yml

* Update jscpd.yml

* Update jscpd.yml

* Update jscpd.yml

* Update jscpd.yml

* Update jscpd.yml

.github/workflows/jscpd.yml

@@ -0,0 +1,72 @@
+name: Check for Duplicated Code
+
+on: 
+  pull_request:
+    branches:
+      - master
+
+jobs:
+  check-duplication:
+    runs-on: ubuntu-latest
+
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v3
+      with:
+        fetch-depth: 0  # Fetch all history for all branches
+
+    - name: Set up Node.js
+      uses: actions/setup-node@v3
+      with:
+        node-version: '20'
+
+    - name: Install dependencies
+      run: |
+        npm install -g jscpd diff-so-fancy
+
+    - name: Get the diff
+      run: git diff origin/master...HEAD --name-only > changed_files.txt
+
+    - name: Filter JavaScript files
+      run: |
+        grep -E '\.js$' changed_files.txt > js_files.txt || true
+
+    - name: Run jscpd on changed files
+      run: |
+        if [ -s js_files.txt ]; then
+          jscpd --files $(cat js_files.txt | tr '\n' ',') --threshold 1 --min-tokens 50 --reporters json --output jscpd-report.json
+        else
+          echo '{}' > jscpd-report.json
+        fi
+
+    - name: Upload jscpd report
+      if: always()
+      uses: actions/upload-artifact@v3
+      with:
+        name: jscpd-report
+        path: jscpd-report.json
+
+    - name: Parse jscpd report and post comment
+      id: post-comment
+      run: |
+        DUPLICATIONS=$(jq '.duplicates | length' jscpd-report.json)
+        if [ "$DUPLICATIONS" -gt 0 ]; then
+          COMMENT="Found $DUPLICATIONS duplications in the codebase:\n\n"
+          COMMENT+=$(jq -r '.duplicates[] | "- `\(.firstFile):\(.lines[0])-\(.lines[1])` duplicated in `\(.secondFile):\(.lines[0])-\(.lines[1])`"' jscpd-report.json)
+          echo "comment<<EOF" >> $GITHUB_ENV
+          echo "$COMMENT" >> $GITHUB_ENV
+          echo "EOF" >> $GITHUB_ENV
+          exit 1
+        fi
+
+    - name: Post GitHub comment
+      if: failure()
+      uses: actions/github-script@v6
+      with:
+        script: |
+          github.rest.issues.createComment({
+            owner: context.repo.owner,
+            repo: context.repo.repo,
+            issue_number: context.issue.number,
+            body: process.env.comment
+          })