feat: allow to set ecosystem sources via the cli

src/twyn/cli.py

@@ -111,6 +111,16 @@ def entry_point() -> None:
     default=False,
     help="Recursively look for files when trying to locate them automatically. Ignored if --dependency-file is given.",
 )
+@click.option(
+    "--pypi-source",
+    type=str,
+    help="Alternative PyPI source URL to use for fetching trusted packages.",
+)
+@click.option(
+    "--npm-source",
+    type=str,
+    help="Alternative npm source URL to use for fetching trusted packages.",
+)
 def run(  # noqa: C901
     config: str,
     dependency_file: tuple[str],
@@ -123,6 +133,8 @@ def run(  # noqa: C901
     json: bool,
     package_ecosystem: Optional[str],
     recursive: bool,
+    pypi_source: Optional[str],
+    npm_source: Optional[str],
 ) -> int:
     if vv:
         logger.setLevel(logging.DEBUG)
@@ -149,6 +161,8 @@ def run(  # noqa: C901
             load_config_from_file=True,
             package_ecosystem=package_ecosystem,
             recursive=recursive,
+            pypi_source=pypi_source,
+            npm_source=npm_source,
         )
     except TwynError as e:
         raise CliError(str(e)) from e

src/twyn/config/config_handler.py

@@ -62,13 +62,15 @@ class ConfigHandler:
     def __init__(self, file_handler: Optional[FileHandler] = None) -> None:
         self.file_handler = file_handler
 
-    def resolve_config(
+    def resolve_config(  # noqa: C901, PLR0912
         self,
         selector_method: Optional[str] = None,
         dependency_files: Optional[set[str]] = None,
         use_cache: Optional[bool] = None,
         package_ecosystem: Optional[PackageEcosystems] = None,
         recursive: Optional[bool] = None,
+        pypi_source: Optional[str] = None,
+        npm_source: Optional[str] = None,
     ) -> TwynConfiguration:
         """Resolve the configuration for Twyn.
 
@@ -107,12 +109,28 @@ def resolve_config(
         else:
             final_recursive = DEFAULT_RECURSIVE
 
+        # Determine final pypi_source from CLI, config file, or default
+        if pypi_source is not None:
+            final_pypi_source = pypi_source
+        elif read_config.pypi_source is not None:
+            final_pypi_source = read_config.pypi_source
+        else:
+            final_pypi_source = None
+
+        # Determine final npm_source from CLI, config file, or default
+        if npm_source is not None:
+            final_npm_source = npm_source
+        elif read_config.npm_source is not None:
+            final_npm_source = read_config.npm_source
+        else:
+            final_npm_source = None
+
         return TwynConfiguration(
             dependency_files=dependency_files or read_config.dependency_files or set(),
             selector_method=final_selector_method,
             allowlist=read_config.allowlist,
-            pypi_source=read_config.pypi_source,
-            npm_source=read_config.npm_source,
+            pypi_source=final_pypi_source,
+            npm_source=final_npm_source,
             use_cache=final_use_cache,
             package_ecosystem=package_ecosystem or read_config.package_ecosystem,
             recursive=final_recursive,

src/twyn/main.py

@@ -44,6 +44,8 @@ def check_dependencies(
     load_config_from_file: bool = False,
     package_ecosystem: Optional[PackageEcosystems] = None,
     recursive: Optional[bool] = None,
+    pypi_source: Optional[str] = None,
+    npm_source: Optional[str] = None,
 ) -> TyposquatCheckResults:
     """
     Check if the provided dependencies are potential typosquats of trusted packages.
@@ -72,6 +74,8 @@ def check_dependencies(
         use_cache=use_cache,
         package_ecosystem=package_ecosystem,
         recursive=recursive,
+        pypi_source=pypi_source,
+        npm_source=npm_source,
     )
     maybe_cache_handler = CacheHandler() if config.use_cache else None
     selector_method_obj = _get_selector_method(config.selector_method)
@@ -284,6 +288,8 @@ def _get_config(
     use_cache: Optional[bool],
     package_ecosystem: Optional[PackageEcosystems],
     recursive: Optional[bool],
+    pypi_source: Optional[str],
+    npm_source: Optional[str],
 ) -> TwynConfiguration:
     """Given the arguments passed to the main function and the configuration loaded from the config file (if any), return a config object."""
     if load_config_from_file:
@@ -296,4 +302,6 @@ def _get_config(
         use_cache=use_cache,
         package_ecosystem=package_ecosystem,
         recursive=recursive,
+        pypi_source=pypi_source,
+        npm_source=npm_source,
     )

tests/main/test_cli.py

@@ -96,6 +96,8 @@ def test_click_arguments_dependency_file(self, mock_check_dependencies: Mock) ->
                 load_config_from_file=True,
                 package_ecosystem=None,
                 recursive=False,
+                pypi_source=None,
+                npm_source=None,
             )
         ]
 
@@ -121,6 +123,8 @@ def test_click_arguments_dependency_file_in_different_path(self, mock_check_depe
                 load_config_from_file=True,
                 package_ecosystem=None,
                 recursive=False,
+                pypi_source=None,
+                npm_source=None,
             )
         ]
 
@@ -146,6 +150,8 @@ def test_package_ecosystem_option(self, mock_check_dependencies: Mock) -> None:
                 load_config_from_file=True,
                 package_ecosystem="pypi",
                 recursive=False,
+                pypi_source=None,
+                npm_source=None,
             )
         ]
 
@@ -170,6 +176,8 @@ def test_click_arguments_single_dependency_cli(self, mock_check_dependencies: Mo
                 load_config_from_file=True,
                 package_ecosystem=None,
                 recursive=False,
+                pypi_source=None,
+                npm_source=None,
             )
         ]
 
@@ -206,6 +214,8 @@ def test_click_arguments_multiple_dependencies(self, mock_check_dependencies: Mo
                 load_config_from_file=True,
                 package_ecosystem=None,
                 recursive=False,
+                pypi_source=None,
+                npm_source=None,
             )
         ]
 
@@ -235,6 +245,8 @@ def test_recursive(self, mock_check_dependencies: Mock) -> None:
             load_config_from_file=True,
             package_ecosystem=None,
             recursive=True,
+            pypi_source=None,
+            npm_source=None,
         )
         assert mock_check_dependencies.call_args_list[0] == call_args
         assert mock_check_dependencies.call_args_list[1] == call_args
@@ -255,6 +267,8 @@ def test_click_arguments_default(self, mock_check_dependencies: Mock) -> None:
                 load_config_from_file=True,
                 package_ecosystem=None,
                 recursive=False,
+                pypi_source=None,
+                npm_source=None,
             )
         ]
 
@@ -387,3 +401,89 @@ def test_unhandled_exception_is_caught_and_wrapped_in_cli_error(
         assert isinstance(result.exception, SystemExit)
         # Check that the generic error message was logged
         assert "Unhandled exception occured." in caplog.text
+
+    @patch("twyn.cli.check_dependencies")
+    def test_pypi_source_option(self, mock_check_dependencies: Mock) -> None:
+        """Test that --pypi-source option is passed correctly."""
+        runner = CliRunner()
+        runner.invoke(
+            cli.run,
+            [
+                "--pypi-source",
+                "https://custom-pypi.org/",
+            ],
+        )
+
+        assert mock_check_dependencies.call_args_list == [
+            call(
+                config_file=None,
+                dependency_files=None,
+                dependencies=None,
+                selector_method=None,
+                use_cache=None,
+                show_progress_bar=True,
+                load_config_from_file=True,
+                package_ecosystem=None,
+                recursive=False,
+                pypi_source="https://custom-pypi.org/",
+                npm_source=None,
+            )
+        ]
+
+    @patch("twyn.cli.check_dependencies")
+    def test_npm_source_option(self, mock_check_dependencies: Mock) -> None:
+        """Test that --npm-source option is passed correctly."""
+        runner = CliRunner()
+        runner.invoke(
+            cli.run,
+            [
+                "--npm-source",
+                "https://custom-npm.org/",
+            ],
+        )
+
+        assert mock_check_dependencies.call_args_list == [
+            call(
+                config_file=None,
+                dependency_files=None,
+                dependencies=None,
+                selector_method=None,
+                use_cache=None,
+                show_progress_bar=True,
+                load_config_from_file=True,
+                package_ecosystem=None,
+                recursive=False,
+                pypi_source=None,
+                npm_source="https://custom-npm.org/",
+            )
+        ]
+
+    @patch("twyn.cli.check_dependencies")
+    def test_both_source_options(self, mock_check_dependencies: Mock) -> None:
+        """Test that both --pypi-source and --npm-source options work together."""
+        runner = CliRunner()
+        runner.invoke(
+            cli.run,
+            [
+                "--pypi-source",
+                "https://custom-pypi.org/",
+                "--npm-source",
+                "https://custom-npm.org/",
+            ],
+        )
+
+        assert mock_check_dependencies.call_args_list == [
+            call(
+                config_file=None,
+                dependency_files=None,
+                dependencies=None,
+                selector_method=None,
+                use_cache=None,
+                show_progress_bar=True,
+                load_config_from_file=True,
+                package_ecosystem=None,
+                recursive=False,
+                pypi_source="https://custom-pypi.org/",
+                npm_source="https://custom-npm.org/",
+            )
+        ]

tests/main/test_main.py

@@ -50,6 +50,7 @@ class TestCheckDependencies:
                     "recursive": False,
                     "pypi_source": "a",
                     "npm_source": "a",
+                    "package_ecosystem": "npm",
                 },
                 TwynConfiguration(
                     dependency_files={"requirements.txt"},
@@ -72,6 +73,7 @@ class TestCheckDependencies:
                     "recursive": True,
                     "pypi_source": "pypi",
                     "npm_source": "npm",
+                    "package_ecosystem": "pypi",
                 },
                 TwynConfiguration(
                     dependency_files={"poetry.lock"},
@@ -80,7 +82,7 @@ class TestCheckDependencies:
                     pypi_source="pypi",
                     npm_source="npm",
                     use_cache=False,
-                    package_ecosystem=None,
+                    package_ecosystem="pypi",
                     recursive=True,
                 ),
             ),  # Config from file takes precendence over fallback values
@@ -122,16 +124,19 @@ def test_options_priorities_assignation(
                 selector_method=cli_config.get("selector_method"),
                 dependency_files=cli_config.get("dependency_file", set()),
                 use_cache=cli_config.get("use_cache"),
+                pypi_source=cli_config.get("pypi_source"),
+                npm_source=cli_config.get("npm_source"),
                 recursive=cli_config.get("recursive"),
                 package_ecosystem=cli_config.get("package_ecosystem"),
             )
 
         assert resolved.dependency_files == expected_resolved_config.dependency_files
         assert resolved.selector_method == expected_resolved_config.selector_method
         assert resolved.allowlist == expected_resolved_config.allowlist
-        assert resolved.use_cache == expected_resolved_config.use_cache
         assert resolved.package_ecosystem == expected_resolved_config.package_ecosystem
         assert resolved.recursive == expected_resolved_config.recursive
+        assert resolved.npm_source == expected_resolved_config.npm_source
+        assert resolved.pypi_source == expected_resolved_config.pypi_source
 
     @patch("twyn.trusted_packages.TopPyPiReference.get_packages")
     def test_check_dependencies_detects_typosquats_from_file(