bug: Add improved support for single arguments in get_list_args function

CHANGELOG.md

@@ -22,6 +22,7 @@ Note: Can be used with `oxsecurity/megalinter@beta` in your GitHub Action mega-l
   - [syft](https://github.com/anchore/syft) use `scan` instead of deprecated `packages` arg
   - [Powershell](https://github.com/PowerShell/PSScriptAnalyzer#readme) Error table truncation improvements
   - [yamllint](https://github.com/adrienverge/yamllint) fix error/warning count to work with different log output formats
+  - Improve support for single argument in `get_list_args` function
 
 - Doc
 

megalinter/config.py

@@ -222,15 +222,30 @@ def get_list(request_id, config_var, default=None):
     return default
 
 
+# Retrieve a configuration variable as a list of arguments, handling various input formats.
 def get_list_args(request_id, config_var, default=None):
+    # Retrieve the variable from the configuration
     var = get(request_id, config_var, None)
-    if var is not None:
-        if isinstance(var, list):
-            return var
-        if var == "":
+
+    match var:
+        # None return the default value
+        case None:
+            return default
+        # Blank or whitespace-only strings return empty list
+        case "" | str() if var.strip() == "":
             return []
-        return shlex.split(var)
-    return default
+        # Integer or a Decimal return it as a list
+        case int() | float():
+            return [str(var)]
+        # If already a list just return it
+        case list():
+            return var
+        # If string does not contain spaces, return it as a list
+        case str() if " " not in var.strip():
+            return [var]
+        # Otherwise, split the string using shlex and return the result
+        case _:
+            return shlex.split(var)
 
 
 def set_value(request_id, config_var, val):

megalinter/tests/test_megalinter/config_test.py

@@ -16,6 +16,7 @@
 from megalinter.constants import ML_REPO
 from megalinter.MegaLinter import Megalinter
 from megalinter.utils import REPO_HOME_DEFAULT
+from unittest.mock import patch
 
 
 class config_test(unittest.TestCase):
@@ -481,3 +482,112 @@ def get_repository(self):
 
     def get_branch(self):
         return os.environ.get("GITHUB_BRANCH", "main")
+
+    def test_get_list_args(self):
+        # This is a test to check the functionality of the get_list_args method.
+        # It mocks the behavior of the get method within this method and asserts the expected output.
+        scenarios = [
+            ("01", "none_value", None, None),
+            ("02", "single_boolean_true", True, ['True']),
+            ("03", "single_boolean_false", False, ['False']),
+            ("04", "integer_value", 42, ['42']),
+            ("05", "float_value", 3.14, ['3.14']),
+            ("06", "empty_list", [], []),
+            ("07", "empty_string", "", []),
+            ("08", "single_space", ' ', []),
+            ("09", "double_space", '  ', []),
+            ("10", "empty_quoted_string", '""', ['""']),
+            ("11", "non_empty_list", ["item1", "item2"], ['item1', 'item2']),
+            ("12", "single_quoted_string", "'single_quoted_string'", ["'single_quoted_string'"]),
+            ("13", "space_separated_items", 'item1 item2', ['item1', 'item2']),
+            ("14", "multiple_single_quoted_strings", "'string1' 'string2' 'string3'",
+                ['string1', 'string2', 'string3']),
+            ("15", "mixed_single_and_double_quotes", '"double quoted" \'single quoted\'',
+                ['double quoted', 'single quoted']),
+            ("16", "three_space_separated_items", "item1 item2 item3", ['item1', 'item2', 'item3']),
+            ("17", "four_space_separated_items", "item1 item2 item3 item4", ['item1', 'item2', 'item3', 'item4']),
+            ("18", "five_space_separated_items", "item1 item2 item3 item4 item5",
+                ['item1', 'item2', 'item3', 'item4', 'item5']),
+            ("19", "single_quoted_with_spaces", "' single quoted with spaces '", [" single quoted with spaces "]),
+            ("20", " quoted_with_leading_space", '" leading space"', [" leading space"]),
+            ("21", "quoted_with_trailing_space", '"trailing space "', ["trailing space "]),
+            ("22", "quoted_with_leading_and_trailing_spaces", '" leading and trailing spaces "',
+                [" leading and trailing spaces "]),
+            ("23", "multiple_quoted_strings_with_spaces", '" string1 " "string2 " " string3 "',
+                [" string1 ", "string2 ", " string3 "]),
+            ("24", "paths_with_nested_folders", "./nested/folder/file.txt", ['./nested/folder/file.txt']),
+            ("25", "paths_with_parent_directory", "../parent/file.txt", ['../parent/file.txt']),
+            ("26", "paths_with_tilde_home", "~/home/user/file.txt", ['~/home/user/file.txt']),
+            ("27", "paths_with_url_files", "http://example.com/file.txt", ['http://example.com/file.txt']),
+            ("28", "multiple_spaces_between_paths", 'path1  path2', ['path1', 'path2']),
+            ("29", "relative_paths", "./relative/path ./another/relative/path",
+                ['./relative/path', './another/relative/path']),
+            ("30", "paths_with_file_extensions", "./file.txt ./folder/file.py", ['./file.txt', './folder/file.py']),
+            ("31", "paths_with_hidden_files", "./folder/.file.sln ./folder/.hidden",
+                ['./folder/.file.sln', './folder/.hidden']),
+            ("32", "absolute_unix_paths", "/root/path /another/root/path", ['/root/path', '/another/root/path']),
+            ("33", "quoted_paths_with_spaces", '"quoted path/with spaces" "another/quoted path"',
+                ['quoted path/with spaces', 'another/quoted path']),
+            ("34", "paths_with_url_and_local_files", "http://example.com/file.txt ./local/file.txt",
+                ['http://example.com/file.txt', './local/file.txt']),
+            ("35", "mixed_quotes_and_spaces", '"quoted item1" item2 \'quoted item3\' item4',
+                ['quoted item1', 'item2', 'quoted item3', 'item4']),
+            ("36", "command_with_options", 'command --option="value with spaces" --flag',
+                ['command', '--option=value with spaces', "--flag"]),
+            ("37", "list_with_spaces_in_elements", ["item 1", "item 2"], ['item 1', 'item 2']),
+            ("38", "list_with_single_element", ["single_item"], ['single_item']),
+            ("39", "list_with_single_element_with_spaces", ["single item"], ['single item']),
+            ("40", "list_with_spaces_and_quotes", ['"item 1"', "'item 2'"], ['"item 1"', "'item 2'"]),
+            ("41", "list_with_single_quoted_element_with_spaces", ['"single item"'], ['"single item"']),
+            ("42", "list_with_single_element_and_spaces", [" single item "], [" single item "]),
+            ("43", "list_with_single_quoted_element_and_spaces", [' "single item" '], [' "single item" ']),
+            ("44", "list_with_comma_separated_items", "item1,item2,item3", ['item1,item2,item3']),
+            ("45", "list_with_comma_and_space_separated_items", "item1, item2, item3", ['item1,', 'item2,', 'item3']),
+            ("46", "list_with_semicolon_separated_items", "item1;item2;item3", ['item1;item2;item3']),
+            ("47", "list_with_semicolon_and_space_separated_items", "item1; item2; item3", ['item1;', 'item2;', 'item3']),
+            ("48", "list_with_multiple_elements", ["item1", "item2", "item3", "item4"], ['item1', 'item2', 'item3', 'item4']),
+            ("49", "list_with_multiple_elements_with_spaces", ["item 1", "item 2", "item 3", "item 4"],
+                ['item 1', 'item 2', 'item 3', 'item 4']),
+            ("50", "list_with_multiple_quoted_elements_with_spaces", ['"item 1"', '"item 2"', '"item 3"', '"item 4"'],
+                ['"item 1"', '"item 2"', '"item 3"', '"item 4"']),
+            ("51", "list_with_multiple_elements_and_spaces", [" item1 ", " item2 ", " item3 ", " item4 "],
+                [" item1 ", " item2 ", " item3 ", " item4 "]),
+            ("52", "list_with_multiple_quoted_elements_and_spaces", [' "item1" ', ' "item2" ', ' "item3" ', ' "item4" '],
+                [' "item1" ', ' "item2" ', ' "item3" ', ' "item4" ']),
+            ("53", "list_with_comma_separated_multiple_items", "item1,item2;item3,item4", ['item1,item2;item3,item4']),
+            ("54", "list_with_comma_and_space_separated_multiple_items", "item1, item2, item3, item4",
+                ['item1,', 'item2,', 'item3,', 'item4']),
+            ("55", "list_with_semicolon_separated_multiple_items", "item1;item2,item3;item4",['item1;item2,item3;item4']),
+            ("56", "list_with_semicolon_and_space_separated_multiple_items", "item1; item2; item3; item4",
+                ['item1;', 'item2;', 'item3;', 'item4']),
+            ("57", "single_windows_path", "C:\\path\\to\\file.txt", ['C:\\path\\to\\file.txt']),
+            ("58", "windows_path_with_spaces", '"C:\\path to\\file.txt"', ['C:\\path to\\file.txt']),
+            ("59", "list_of_two_windows_paths", ["C:\\path\\to\\file1.txt", "C:\\path\\to\\file2.txt"],
+                ['C:\\path\\to\\file1.txt', 'C:\\path\\to\\file2.txt']),
+            ("60", "list_of_two_windows_paths_with_spaces", ['"C:\\path to\\file1.txt"', '"C:\\path to\\file2.txt"'],
+                ['"C:\\path to\\file1.txt"', '"C:\\path to\\file2.txt"']),
+            ("61", "network_share", "\\\\server\\share", ["\\\\server\\share"]),
+            ("62", "network_share_with_spaces", "'\\\\server\\share\\path with spaces\\file.txt'", ['\\\\server\\share\\path with spaces\\file.txt']),
+            ("63", "relative_path", ".\\path\\to\\file.txt", [".\\path\\to\\file.txt"]),
+            ("64", "relative_path_with_spaces", '".\\path to\\file.txt"', ['.\\path to\\file.txt']),
+            ("65", "list_of_two_network_shares", ["\\\\server1\\share\\file1.txt", "\\\\server2\\share\\file2.txt"],
+                ["\\\\server1\\share\\file1.txt", "\\\\server2\\share\\file2.txt"]),
+            ("66", "list_of_two_relative_paths", [".\\path1\\file1.txt", ".\\path2\\file2.txt"], [".\\path1\\file1.txt", ".\\path2\\file2.txt"])
+
+            # Commented out cases due to shlex.split removing the /
+            # ("67", "absolute_windows_paths", "C:\\absolute\\path C:\\another\\absolute\\path",
+            #   ['C:\\absolute\\path', 'C:\\another\\absolute\\path']),
+            # ("68", "paths_with_environment_variables", "$HOME/file.txt $USERPROFILE\\file1.txt",
+            #   ['$HOME/file.txt', '$USERPROFILE\\file1.txt']),
+            # ("69", "path_with_mixed_separators", "path/to/file path\\to\\another\\file",
+            #   ['path/to/file', 'path\\to\\another\\file']),
+            # ("70", "complex_paths_and_files", 'file1 "complex path/file2" file3\\with\\backslashes',
+            #   ['file1', 'complex path/file2', 'file3\\with\\backslashes'])
+        ]
+
+        for scenario_number, scenario_name, return_value, expected_result in scenarios:
+            with self.subTest(scenario_number=scenario_number, scenario_name=scenario_name):
+                with patch.object(config, 'get', return_value=return_value):
+                    result = config.get_list_args('dummy_request_id', scenario_name)
+                    self.assertEqual(result, expected_result,
+                                        f"Failed on result scenario {scenario_number}: {scenario_name}")