config: start migrating Config.{rootdir,inifile} from py.path.local to pathlib

changelog/7685.improvement.rst

@@ -0,0 +1,3 @@
+Added two new attributes :attr:`rootpath <_pytest.config.Config.rootpath>` and :attr:`inipath <_pytest.config.Config.inipath>` to :class:`Config <_pytest.config.Config>`.
+These attributes are :class:`pathlib.Path` versions of the existing :attr:`rootdir <_pytest.config.Config.rootdir>` and :attr:`inifile <_pytest.config.Config.inifile>` attributes,
+and should be preferred over them when possible.

doc/en/customize.rst

@@ -180,10 +180,15 @@ are never merged - the first match wins.
 The internal :class:`Config <_pytest.config.Config>` object (accessible via hooks or through the :fixture:`pytestconfig` fixture)
 will subsequently carry these attributes:
 
-- ``config.rootdir``: the determined root directory, guaranteed to exist.
+- :attr:`config.rootpath <_pytest.config.Config.rootpath>`: the determined root directory, guaranteed to exist.
 
-- ``config.inifile``: the determined ``configfile``, may be ``None`` (it is named ``inifile``
-  for historical reasons).
+- :attr:`config.inipath <_pytest.config.Config.inipath>`: the determined ``configfile``, may be ``None``
+  (it is named ``inipath`` for historical reasons).
+
+.. versionadded:: 6.1
+    The ``config.rootpath`` and ``config.inipath`` properties. They are :class:`pathlib.Path`
+    versions of the older ``config.rootdir`` and ``config.inifile``, which have type
+    ``py.path.local``, and still exist for backward compatibility.
 
 The ``rootdir`` is used as a reference directory for constructing test
 addresses ("nodeids") and can be used also by plugins for storing

src/_pytest/cacheprovider.py

@@ -78,7 +78,7 @@ def clear_cache(cls, cachedir: Path) -> None:
 
     @staticmethod
     def cache_dir_from_config(config: Config) -> Path:
-        return resolve_from_str(config.getini("cache_dir"), config.rootdir)
+        return resolve_from_str(config.getini("cache_dir"), config.rootpath)
 
     def warn(self, fmt: str, **args: object) -> None:
         import warnings
@@ -264,7 +264,7 @@ def __init__(self, config: Config) -> None:
 
     def get_last_failed_paths(self) -> Set[Path]:
         """Return a set with all Paths()s of the previously failed nodeids."""
-        rootpath = Path(str(self.config.rootdir))
+        rootpath = self.config.rootpath
         result = {rootpath / nodeid.split("::")[0] for nodeid in self.lastfailed}
         return {x for x in result if x.exists()}
 
@@ -495,7 +495,7 @@ def pytest_report_header(config: Config) -> Optional[str]:
         # starting with .., ../.. if sensible
 
         try:
-            displaypath = cachedir.relative_to(str(config.rootdir))
+            displaypath = cachedir.relative_to(config.rootpath)
         except ValueError:
             displaypath = cachedir
         return "cachedir: {}".format(displaypath)

src/_pytest/config/__init__.py

@@ -47,6 +47,7 @@
 from _pytest.compat import TYPE_CHECKING
 from _pytest.outcomes import fail
 from _pytest.outcomes import Skipped
+from _pytest.pathlib import bestrelpath
 from _pytest.pathlib import import_path
 from _pytest.pathlib import ImportMode
 from _pytest.pathlib import Path
@@ -520,7 +521,7 @@ def _getconftestmodules(
         else:
             directory = path
 
-        # XXX these days we may rather want to use config.rootdir
+        # XXX these days we may rather want to use config.rootpath
         # and allow users to opt into looking into the rootdir parent
         # directories instead of requiring to specify confcutdir.
         clist = []
@@ -820,13 +821,13 @@ class Config:
     :param PytestPluginManager pluginmanager:
 
     :param InvocationParams invocation_params:
-        Object containing the parameters regarding the ``pytest.main``
+        Object containing parameters regarding the :func:`pytest.main`
         invocation.
     """
 
     @attr.s(frozen=True)
     class InvocationParams:
-        """Holds parameters passed during ``pytest.main()``
+        """Holds parameters passed during :func:`pytest.main`.
 
         The object attributes are read-only.
 
@@ -841,11 +842,20 @@ class InvocationParams:
         """
 
         args = attr.ib(type=Tuple[str, ...], converter=_args_converter)
-        """Tuple of command-line arguments as passed to ``pytest.main()``."""
+        """The command-line arguments as passed to :func:`pytest.main`.
+
+        :type: Tuple[str, ...]
+        """
         plugins = attr.ib(type=Optional[Sequence[Union[str, _PluggyPlugin]]])
-        """List of extra plugins, might be `None`."""
+        """Extra plugins, might be `None`.
+
+        :type: Optional[Sequence[Union[str, plugin]]]
+        """
         dir = attr.ib(type=Path)
-        """Directory from which ``pytest.main()`` was invoked."""
+        """The directory from which :func:`pytest.main` was invoked.
+
+        :type: pathlib.Path
+        """
 
     def __init__(
         self,
@@ -867,6 +877,10 @@ def __init__(
         """
 
         self.invocation_params = invocation_params
+        """The parameters with which pytest was invoked.
+
+        :type: InvocationParams
+        """
 
         _a = FILE_OR_DIR
         self._parser = Parser(
@@ -876,7 +890,7 @@ def __init__(
         self.pluginmanager = pluginmanager
         """The plugin manager handles plugin registration and hook invocation.
 
-        :type: PytestPluginManager.
+        :type: PytestPluginManager
         """
 
         self.trace = self.pluginmanager.trace.root.get("config")
@@ -901,9 +915,55 @@ def __init__(
 
     @property
     def invocation_dir(self) -> py.path.local:
-        """Backward compatibility."""
+        """The directory from which pytest was invoked.
+
+        Prefer to use :attr:`invocation_params.dir <InvocationParams.dir>`,
+        which is a :class:`pathlib.Path`.
+
+        :type: py.path.local
+        """
         return py.path.local(str(self.invocation_params.dir))
 
+    @property
+    def rootpath(self) -> Path:
+        """The path to the :ref:`rootdir <rootdir>`.
+
+        :type: pathlib.Path
+
+        .. versionadded:: 6.1
+        """
+        return self._rootpath
+
+    @property
+    def rootdir(self) -> py.path.local:
+        """The path to the :ref:`rootdir <rootdir>`.
+
+        Prefer to use :attr:`rootpath`, which is a :class:`pathlib.Path`.
+
+        :type: py.path.local
+        """
+        return py.path.local(str(self.rootpath))
+
+    @property
+    def inipath(self) -> Optional[Path]:
+        """The path to the :ref:`configfile <configfiles>`.
+
+        :type: Optional[pathlib.Path]
+
+        .. versionadded:: 6.1
+        """
+        return self._inipath
+
+    @property
+    def inifile(self) -> Optional[py.path.local]:
+        """The path to the :ref:`configfile <configfiles>`.
+
+        Prefer to use :attr:`inipath`, which is a :class:`pathlib.Path`.
+
+        :type: Optional[py.path.local]
+        """
+        return py.path.local(str(self.inipath)) if self.inipath else None
+
     def add_cleanup(self, func: Callable[[], None]) -> None:
         """Add a function to be called when the config object gets out of
         use (usually coninciding with pytest_unconfigure)."""
@@ -977,9 +1037,9 @@ def notify_exception(
 
     def cwd_relative_nodeid(self, nodeid: str) -> str:
         # nodeid's are relative to the rootpath, compute relative to cwd.
-        if self.invocation_dir != self.rootdir:
-            fullpath = self.rootdir.join(nodeid)
-            nodeid = self.invocation_dir.bestrelpath(fullpath)
+        if self.invocation_params.dir != self.rootpath:
+            fullpath = self.rootpath / nodeid
+            nodeid = bestrelpath(self.invocation_params.dir, fullpath)
         return nodeid
 
     @classmethod
@@ -1014,11 +1074,11 @@ def _initini(self, args: Sequence[str]) -> None:
             rootdir_cmd_arg=ns.rootdir or None,
             config=self,
         )
-        self.rootdir = py.path.local(str(rootpath))
-        self.inifile = py.path.local(str(inipath)) if inipath else None
+        self._rootpath = rootpath
+        self._inipath = inipath
         self.inicfg = inicfg
-        self._parser.extra_info["rootdir"] = self.rootdir
-        self._parser.extra_info["inifile"] = self.inifile
+        self._parser.extra_info["rootdir"] = str(self.rootpath)
+        self._parser.extra_info["inifile"] = str(self.inipath)
         self._parser.addini("addopts", "extra command line options", "args")
         self._parser.addini("minversion", "minimally required pytest version")
         self._parser.addini(
@@ -1110,8 +1170,8 @@ def _preparse(self, args: List[str], addopts: bool = True) -> None:
         self._validate_plugins()
         self._warn_about_skipped_plugins()
 
-        if self.known_args_namespace.confcutdir is None and self.inifile:
-            confcutdir = py.path.local(self.inifile).dirname
+        if self.known_args_namespace.confcutdir is None and self.inipath is not None:
+            confcutdir = str(self.inipath.parent)
             self.known_args_namespace.confcutdir = confcutdir
         try:
             self.hook.pytest_load_initial_conftests(
@@ -1147,13 +1207,13 @@ def _checkversion(self) -> None:
 
             if not isinstance(minver, str):
                 raise pytest.UsageError(
-                    "%s: 'minversion' must be a single value" % self.inifile
+                    "%s: 'minversion' must be a single value" % self.inipath
                 )
 
             if Version(minver) > Version(pytest.__version__):
                 raise pytest.UsageError(
                     "%s: 'minversion' requires pytest-%s, actual pytest-%s'"
-                    % (self.inifile, minver, pytest.__version__,)
+                    % (self.inipath, minver, pytest.__version__,)
                 )
 
     def _validate_config_options(self) -> None:
@@ -1218,10 +1278,10 @@ def parse(self, args: List[str], addopts: bool = True) -> None:
                 args, self.option, namespace=self.option
             )
             if not args:
-                if self.invocation_dir == self.rootdir:
+                if self.invocation_params.dir == self.rootpath:
                     args = self.getini("testpaths")
                 if not args:
-                    args = [str(self.invocation_dir)]
+                    args = [str(self.invocation_params.dir)]
             self.args = args
         except PrintHelp:
             pass
@@ -1324,10 +1384,10 @@ def _getini(self, name: str):
         #
         if type == "pathlist":
             # TODO: This assert is probably not valid in all cases.
-            assert self.inifile is not None
-            dp = py.path.local(self.inifile).dirpath()
+            assert self.inipath is not None
+            dp = self.inipath.parent
             input_values = shlex.split(value) if isinstance(value, str) else value
-            return [dp.join(x, abs=True) for x in input_values]
+            return [py.path.local(str(dp / x)) for x in input_values]
         elif type == "args":
             return shlex.split(value) if isinstance(value, str) else value
         elif type == "linelist":

src/_pytest/fixtures.py

@@ -50,6 +50,7 @@
 from _pytest.mark import ParameterSet
 from _pytest.outcomes import fail
 from _pytest.outcomes import TEST_OUTCOME
+from _pytest.pathlib import absolutepath
 
 if TYPE_CHECKING:
     from typing import Deque
@@ -1443,7 +1444,7 @@ def getfixtureinfo(
     def pytest_plugin_registered(self, plugin: _PluggyPlugin) -> None:
         nodeid = None
         try:
-            p = py.path.local(plugin.__file__)  # type: ignore[attr-defined]
+            p = absolutepath(plugin.__file__)  # type: ignore[attr-defined]
         except AttributeError:
             pass
         else:
@@ -1452,8 +1453,13 @@ def pytest_plugin_registered(self, plugin: _PluggyPlugin) -> None:
             # Construct the base nodeid which is later used to check
             # what fixtures are visible for particular tests (as denoted
             # by their test id).
-            if p.basename.startswith("conftest.py"):
-                nodeid = p.dirpath().relto(self.config.rootdir)
+            if p.name.startswith("conftest.py"):
+                try:
+                    nodeid = str(p.parent.relative_to(self.config.rootpath))
+                except ValueError:
+                    nodeid = ""
+                if nodeid == ".":
+                    nodeid = ""
                 if os.sep != nodes.SEP:
                     nodeid = nodeid.replace(os.sep, nodes.SEP)
 

src/_pytest/logging.py

@@ -603,7 +603,7 @@ def set_log_path(self, fname: str) -> None:
         fpath = Path(fname)
 
         if not fpath.is_absolute():
-            fpath = Path(str(self._config.rootdir), fpath)
+            fpath = self._config.rootpath / fpath
 
         if not fpath.parent.exists():
             fpath.parent.mkdir(exist_ok=True, parents=True)

src/_pytest/main.py

@@ -33,6 +33,7 @@
 from _pytest.fixtures import FixtureManager
 from _pytest.outcomes import exit
 from _pytest.pathlib import absolutepath
+from _pytest.pathlib import bestrelpath
 from _pytest.pathlib import Path
 from _pytest.pathlib import visit
 from _pytest.reports import CollectReport
@@ -425,11 +426,11 @@ class Failed(Exception):
 
 
 @attr.s
-class _bestrelpath_cache(Dict[py.path.local, str]):
-    path = attr.ib(type=py.path.local)
+class _bestrelpath_cache(Dict[Path, str]):
+    path = attr.ib(type=Path)
 
-    def __missing__(self, path: py.path.local) -> str:
-        r = self.path.bestrelpath(path)  # type: str
+    def __missing__(self, path: Path) -> str:
+        r = bestrelpath(self.path, path)
         self[path] = r
         return r
 
@@ -444,8 +445,8 @@ class Session(nodes.FSCollector):
     exitstatus = None  # type: Union[int, ExitCode]
 
     def __init__(self, config: Config) -> None:
-        nodes.FSCollector.__init__(
-            self, config.rootdir, parent=None, config=config, session=self, nodeid=""
+        super().__init__(
+            config.rootdir, parent=None, config=config, session=self, nodeid=""
         )
         self.testsfailed = 0
         self.testscollected = 0
@@ -456,8 +457,8 @@ def __init__(self, config: Config) -> None:
         self._initialpaths = frozenset()  # type: FrozenSet[py.path.local]
 
         self._bestrelpathcache = _bestrelpath_cache(
-            config.rootdir
-        )  # type: Dict[py.path.local, str]
+            config.rootpath
+        )  # type: Dict[Path, str]
 
         self.config.pluginmanager.register(self, name="session")
 
@@ -475,7 +476,7 @@ def __repr__(self) -> str:
             self.testscollected,
         )
 
-    def _node_location_to_relpath(self, node_path: py.path.local) -> str:
+    def _node_location_to_relpath(self, node_path: Path) -> str:
         # bestrelpath is a quite slow function.
         return self._bestrelpathcache[node_path]
 
@@ -599,7 +600,9 @@ def perform_collect(  # noqa: F811
             initialpaths = []  # type: List[py.path.local]
             for arg in args:
                 fspath, parts = resolve_collection_argument(
-                    self.config.invocation_dir, arg, as_pypath=self.config.option.pyargs
+                    self.config.invocation_params.dir,
+                    arg,
+                    as_pypath=self.config.option.pyargs,
                 )
                 self._initial_parts.append((fspath, parts))
                 initialpaths.append(fspath)
@@ -817,7 +820,7 @@ def search_pypath(module_name: str) -> str:
 
 
 def resolve_collection_argument(
-    invocation_dir: py.path.local, arg: str, *, as_pypath: bool = False
+    invocation_path: Path, arg: str, *, as_pypath: bool = False
 ) -> Tuple[py.path.local, List[str]]:
     """Parse path arguments optionally containing selection parts and return (fspath, names).
 
@@ -844,7 +847,7 @@ def resolve_collection_argument(
     strpath, *parts = str(arg).split("::")
     if as_pypath:
         strpath = search_pypath(strpath)
-    fspath = Path(str(invocation_dir), strpath)
+    fspath = invocation_path / strpath
     fspath = absolutepath(fspath)
     if not fspath.exists():
         msg = (