feature: new github action which limit the file changes in single PR to 20

.github/workflows/count_changed_files.py

@@ -0,0 +1,103 @@
+#!/usr/bin/env python3
+# -*- coding: UTF-8 -*-
+"""Script to limit number of file changes in single PR.
+
+Methodology:
+
+    Analyses the Pull request to find if the count of file changed in a PR
+    exceeds a pre-defined nummber 20
+
+    This scripts encourages contributors to align with project practices,
+    reducing the likelihood of unintentional merges into incorrect branches.
+
+NOTE:
+
+    This script complies with our python3 coding and documentation standards.
+    It complies with:
+
+        1) Pylint
+        2) Pydocstyle
+        3) Pycodestyle
+        4) Flake8
+
+"""
+
+import os
+import sys
+
+
+def _count_changed_files(base_branch, current_branch):
+    """
+    Count the number of changed files between two branches.
+
+    Args:
+        base_branch (str): The base branch.
+        current_branch (str): The current branch.
+
+    Returns:
+        int: The number of changed files.
+
+    Raises:
+        SystemExit: If an error occurs during execution.
+    """
+    try:
+        base_branch = f"origin/{base_branch}"
+        current_branch = f"origin/{current_branch}"
+        # Run git command to get the list of changed files
+        command = f"git diff --name-only {base_branch}...{current_branch} | wc -l"
+        file_count = int(os.popen(command).read().strip())
+        return file_count
+    except Exception as e:
+        print(f"Error: {e}")
+        sys.exit(1)
+
+
+def main():
+    """
+    Execute the script's main functionality.
+
+    This function serves as the entry point for the script. It performs
+    the following tasks:
+    1. Validates and retrieves the base branch and current commit from
+       command line arguments.
+    2. Counts the number of changed files between the specified branches.
+    3. Checks if the count of changed files exceeds the acceptable
+       limit (20).
+    4. Provides informative messages based on the analysis.
+
+    Raises:
+        SystemExit: If an error occurs during execution.
+    """
+    try:
+        # Get base branch and current commit
+        base_branch = sys.argv[1]
+        print(base_branch)
+        current_branch = sys.argv[2]
+        print(current_branch)
+
+        # Count changed files
+        file_count = _count_changed_files(base_branch, current_branch)
+
+        print(f"Number of changed files: {file_count}")
+
+        # Check if the count exceeds 20
+        if file_count > 20:
+            print(
+                "Error: Too many files (greater than 20) changed in the pull request."
+            )
+            print("Possible issues:")
+            print("- Contributor may be merging into an incorrect branch.")
+            print(
+                "- Source branch may be incorrect please use develop as source branch."
+            )
+            sys.exit(1)
+
+    except IndexError:
+        print(
+            "Error: Please provide base branch and current commit as command line arguments."
+        )
+        sys.exit(1)
+
+
+if __name__ == "__main__":
+    main()

.github/workflows/pull-requests.yml

@@ -52,6 +52,31 @@ jobs:
         run: npm run lint:check  
 
 
+  Check-Changed-Files:
+    runs-on: ubuntu-latest
+    needs: Code-Quality-Checks
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v1
+
+      - name: Set up Python
+        uses: actions/setup-python@v2
+        with:
+          python-version: 3.9
+
+      - name: Install dependencies
+        run: |
+          python -m pip install --upgrade pip
+          pip install black pydocstyle
+
+      - name: Run Python script
+        run: |
+          python .github/workflows/check_changed_files.py "${{ github.base_ref }}" "${{ github.head_ref }}"
+
+      - name: Run Black
+        run: black --check.
+
   Test-Application:
     name: Test Application
     runs-on: ubuntu-latest