fix(tools): Enabled removing requirements.* files

tools/check_python_dependencies.py

@@ -37,6 +37,21 @@ except ImportError:
 PYTHON_PACKAGE_RE = re.compile(r'[^<>=~]+')
 
 
+def validate_requirement_list(file_path: str) -> str:
+    """Validate that a requirement file exists and is readable."""
+    if not os.path.isfile(file_path):
+        raise argparse.ArgumentTypeError(
+            f'Requirement file {file_path} not found\n'
+            'Please make sure the file path is correct.\n'
+            'In case the file was removed, please run the export script again, to update the environment.'
+        )
+    try:
+        open(file_path, encoding='utf-8').close()
+    except IOError as e:
+        raise argparse.ArgumentTypeError(f'Cannot read requirement file {file_path}: {e}')
+    return file_path
+
+
 # The version and requires function from importlib.metadata in python prior
 # 3.10 does perform distribution name normalization before searching for
 # package distribution. This might cause problems for package with dot in its
@@ -66,12 +81,21 @@ def get_requires(name: str) -> Optional[list]:
 
 if __name__ == '__main__':
     parser = argparse.ArgumentParser(description='ESP-IDF Python package dependency checker')
-    parser.add_argument('--requirements', '-r',
-                        help='Path to a requirements file (can be used multiple times)',
-                        action='append', default=[])
-    parser.add_argument('--constraints', '-c', default=[],
-                        help='Path to a constraints file (can be used multiple times)',
-                        action='append')
+    parser.add_argument(
+        '--requirements',
+        '-r',
+        help='Path to a requirements file (can be used multiple times)',
+        action='append',
+        default=[],
+        type=validate_requirement_list,
+    )
+    parser.add_argument(
+        '--constraints',
+        '-c',
+        default=[],
+        help='Path to a constraints file (can be used multiple times)',
+        action='append',
+    )
     args = parser.parse_args()
 
     required_set = set()