Move pathlist support to legacypath plugin

src/_pytest/config/__init__.py

@@ -47,7 +47,6 @@
 from _pytest._io import TerminalWriter
 from _pytest.compat import final
 from _pytest.compat import importlib_metadata
-from _pytest.compat import legacy_path
 from _pytest.outcomes import fail
 from _pytest.outcomes import Skipped
 from _pytest.pathlib import absolutepath
@@ -1367,6 +1366,10 @@ def getini(self, name: str):
             self._inicache[name] = val = self._getini(name)
             return val
 
+    # Meant for easy monkeypatching by legacypath plugin.
+    def _getini_unknown_type(self, name: str, type: str, value: Union[str, List[str]]):
+        raise ValueError(f"unknown configuration type: {type}", value)
+
     def _getini(self, name: str):
         try:
             description, type, default = self._parser._inidict[name]
@@ -1399,13 +1402,7 @@ def _getini(self, name: str):
         #     a_line_list = ["tests", "acceptance"]
         #   in this case, we already have a list ready to use.
         #
-        if type == "pathlist":
-            # TODO: This assert is probably not valid in all cases.
-            assert self.inipath is not None
-            dp = self.inipath.parent
-            input_values = shlex.split(value) if isinstance(value, str) else value
-            return [legacy_path(str(dp / x)) for x in input_values]
-        elif type == "paths":
+        if type == "paths":
             # TODO: This assert is probably not valid in all cases.
             assert self.inipath is not None
             dp = self.inipath.parent
@@ -1420,9 +1417,12 @@ def _getini(self, name: str):
                 return value
         elif type == "bool":
             return _strtobool(str(value).strip())
-        else:
-            assert type in [None, "string"]
+        elif type == "string":
             return value
+        elif type is None:
+            return value
+        else:
+            return self._getini_unknown_type(name, type, value)
 
     def _getconftest_pathlist(
         self, name: str, path: Path, rootpath: Path

src/_pytest/legacypath.py

@@ -1,4 +1,5 @@
 """Add backward compatibility support for the legacy py path type."""
+import shlex
 import subprocess
 from pathlib import Path
 from typing import List
@@ -375,6 +376,19 @@ def Session_stardir(self: pytest.Session) -> LEGACY_PATH:
     return legacy_path(self.startpath)
 
 
+def Config__getini_unknown_type(
+    self, name: str, type: str, value: Union[str, List[str]]
+):
+    if type == "pathlist":
+        # TODO: This assert is probably not valid in all cases.
+        assert self.inipath is not None
+        dp = self.inipath.parent
+        input_values = shlex.split(value) if isinstance(value, str) else value
+        return [legacy_path(str(dp / x)) for x in input_values]
+    else:
+        raise ValueError(f"unknown configuration type: {type}", value)
+
+
 def pytest_configure(config: pytest.Config) -> None:
     mp = pytest.MonkeyPatch()
     config._cleanup.append(mp.undo)
@@ -415,3 +429,6 @@ def pytest_configure(config: pytest.Config) -> None:
 
     # Add Session.startdir property.
     mp.setattr(pytest.Session, "startdir", property(Session_stardir), raising=False)
+
+    # Add pathlist configuration type.
+    mp.setattr(pytest.Config, "_getini_unknown_type", Config__getini_unknown_type)

testing/test_config.py

@@ -635,14 +635,11 @@ def pytest_addoption(parser):
         pytest.raises(ValueError, config.getini, "other")
 
     @pytest.mark.parametrize("config_type", ["ini", "pyproject"])
-    @pytest.mark.parametrize("ini_type", ["paths", "pathlist"])
-    def test_addini_paths(
-        self, pytester: Pytester, config_type: str, ini_type: str
-    ) -> None:
+    def test_addini_paths(self, pytester: Pytester, config_type: str) -> None:
         pytester.makeconftest(
-            f"""
+            """
             def pytest_addoption(parser):
-                parser.addini("paths", "my new ini value", type="{ini_type}")
+                parser.addini("paths", "my new ini value", type="paths")
                 parser.addini("abc", "abc value")
         """
         )
@@ -1521,28 +1518,24 @@ def test_pass(pytestconfig):
         assert result.ret == 0
         result.stdout.fnmatch_lines(["custom_option:3.0"])
 
-    @pytest.mark.parametrize("ini_type", ["paths", "pathlist"])
-    def test_override_ini_paths(self, pytester: Pytester, ini_type: str) -> None:
+    def test_override_ini_paths(self, pytester: Pytester) -> None:
         pytester.makeconftest(
-            f"""
+            """
             def pytest_addoption(parser):
-                parser.addini("paths", "my new ini value", type="{ini_type}")"""
+                parser.addini("paths", "my new ini value", type="paths")"""
         )
         pytester.makeini(
             """
             [pytest]
             paths=blah.py"""
         )
         pytester.makepyfile(
-            rf"""
+            r"""
             def test_overriden(pytestconfig):
                 config_paths = pytestconfig.getini("paths")
                 print(config_paths)
                 for cpf in config_paths:
-                    if "{ini_type}" == "pathlist":
-                        print('\nuser_path:%s' % cpf.basename)
-                    else:
-                        print('\nuser_path:%s' % cpf.name)
+                    print('\nuser_path:%s' % cpf.name)
             """
         )
         result = pytester.runpytest(

testing/test_legacypath.py

@@ -78,3 +78,58 @@ def test_session_scoped_unavailable_attributes(self, session_request):
             match="path not available in session-scoped context",
         ):
             session_request.fspath
+
+
+@pytest.mark.parametrize("config_type", ["ini", "pyproject"])
+def test_addini_paths(pytester: Pytester, config_type: str) -> None:
+    pytester.makeconftest(
+        """
+        def pytest_addoption(parser):
+            parser.addini("paths", "my new ini value", type="pathlist")
+            parser.addini("abc", "abc value")
+    """
+    )
+    if config_type == "ini":
+        inipath = pytester.makeini(
+            """
+            [pytest]
+            paths=hello world/sub.py
+        """
+        )
+    elif config_type == "pyproject":
+        inipath = pytester.makepyprojecttoml(
+            """
+            [tool.pytest.ini_options]
+            paths=["hello", "world/sub.py"]
+        """
+        )
+    config = pytester.parseconfig()
+    values = config.getini("paths")
+    assert len(values) == 2
+    assert values[0] == inipath.parent.joinpath("hello")
+    assert values[1] == inipath.parent.joinpath("world/sub.py")
+    pytest.raises(ValueError, config.getini, "other")
+
+
+def test_override_ini_paths(pytester: Pytester) -> None:
+    pytester.makeconftest(
+        """
+        def pytest_addoption(parser):
+            parser.addini("paths", "my new ini value", type="pathlist")"""
+    )
+    pytester.makeini(
+        """
+        [pytest]
+        paths=blah.py"""
+    )
+    pytester.makepyfile(
+        r"""
+        def test_overriden(pytestconfig):
+            config_paths = pytestconfig.getini("paths")
+            print(config_paths)
+            for cpf in config_paths:
+                print('\nuser_path:%s' % cpf.basename)
+        """
+    )
+    result = pytester.runpytest("--override-ini", "paths=foo/bar1.py foo/bar2.py", "-s")
+    result.stdout.fnmatch_lines(["user_path:bar1.py", "user_path:bar2.py"])