Use pathlib instead of os.path module

pyproject.toml

@@ -67,6 +67,7 @@ extend-select = [
   "TCH", # flake8-type-checking
   "TID", # flake8-tidy-imports
   "UP",  # pyupgrade
+  "PTH", # flake8-use-pathlib
 ]
 ignore = [
   "B904", # use 'raise ... from err'

src/poetry/core/masonry/api.py

@@ -39,7 +39,7 @@ def get_requires_for_build_wheel(
 def prepare_metadata_for_build_wheel(
     metadata_directory: str, config_settings: dict[str, Any] | None = None
 ) -> str:
-    poetry = Factory().create_poetry(Path(".").resolve(), with_groups=False)
+    poetry = Factory().create_poetry(Path().resolve(), with_groups=False)
     builder = WheelBuilder(poetry)
     metadata_path = Path(metadata_directory)
     dist_info = builder.prepare_metadata(metadata_path)
@@ -52,7 +52,7 @@ def build_wheel(
     metadata_directory: str | None = None,
 ) -> str:
     """Builds a wheel, places it in wheel_directory"""
-    poetry = Factory().create_poetry(Path(".").resolve(), with_groups=False)
+    poetry = Factory().create_poetry(Path().resolve(), with_groups=False)
     metadata_path = None if metadata_directory is None else Path(metadata_directory)
 
     return WheelBuilder.make_in(
@@ -64,7 +64,7 @@ def build_sdist(
     sdist_directory: str, config_settings: dict[str, Any] | None = None
 ) -> str:
     """Builds an sdist, places it in sdist_directory"""
-    poetry = Factory().create_poetry(Path(".").resolve(), with_groups=False)
+    poetry = Factory().create_poetry(Path().resolve(), with_groups=False)
 
     path = SdistBuilder(poetry).build(Path(sdist_directory))
 
@@ -76,7 +76,7 @@ def build_editable(
     config_settings: dict[str, Any] | None = None,
     metadata_directory: str | None = None,
 ) -> str:
-    poetry = Factory().create_poetry(Path(".").resolve(), with_groups=False)
+    poetry = Factory().create_poetry(Path().resolve(), with_groups=False)
     metadata_path = None if metadata_directory is None else Path(metadata_directory)
 
     return WheelBuilder.make_in(

src/poetry/core/masonry/builders/sdist.py

@@ -141,7 +141,7 @@ def build_setup(self) -> bytes:
                         pkg_root = os.path.relpath(pkg_dir, str(self._path))
                         if "" in package_dir:
                             package_dir.update(
-                                (p, os.path.join(pkg_root, p.replace(".", "/")))
+                                (p, (Path(pkg_root) / p.replace(".", "/")).as_posix())
                                 for p in _packages
                             )
                         else:
@@ -258,18 +258,18 @@ def find_packages(
         subpkg_paths = set()
 
         def find_nearest_pkg(rel_path: str) -> tuple[str, str]:
-            parts = rel_path.split(os.sep)
+            parts = Path(rel_path).parts
             for i in reversed(range(1, len(parts))):
                 ancestor = "/".join(parts[:i])
                 if ancestor in subpkg_paths:
-                    pkg = ".".join([pkg_name] + parts[:i])
+                    pkg = ".".join([pkg_name, *parts[:i]])
                     return pkg, "/".join(parts[i:])
 
             # Relative to the top-level package
             return pkg_name, Path(rel_path).as_posix()
 
-        for path, _dirnames, filenames in os.walk(str(base), topdown=True):
-            if os.path.basename(path) == "__pycache__":
+        for path, _dirnames, filenames in os.walk(base, topdown=True):
+            if Path(path).name == "__pycache__":
                 continue
 
             from_top_level = os.path.relpath(path, base)
@@ -285,7 +285,7 @@ def find_nearest_pkg(rel_path: str) -> tuple[str, str]:
             )
             if is_subpkg:
                 subpkg_paths.add(from_top_level)
-                parts = from_top_level.split(os.sep)
+                parts = Path(from_top_level).parts
                 packages.append(".".join([pkg_name, *parts]))
             else:
                 pkg, from_nearest_pkg = find_nearest_pkg(from_top_level)

src/poetry/core/masonry/builders/wheel.py

@@ -104,11 +104,12 @@ def build(
         if not target_dir.exists():
             target_dir.mkdir(parents=True)
 
-        fd, temp_path = tempfile.mkstemp(suffix=".whl")
+        fd, temp = tempfile.mkstemp(suffix=".whl")
 
-        st_mode = os.stat(temp_path).st_mode
+        temp_path = Path(temp)
+        st_mode = temp_path.stat().st_mode
         new_mode = normalize_file_permissions(st_mode)
-        os.chmod(temp_path, new_mode)
+        temp_path.chmod(new_mode)
 
         with os.fdopen(fd, "w+b") as fd_file, zipfile.ZipFile(
             fd_file, mode="w", compression=zipfile.ZIP_DEFLATED
@@ -137,7 +138,7 @@ def build(
         wheel_path = target_dir / self.wheel_filename
         if wheel_path.exists():
             wheel_path.unlink()
-        shutil.move(temp_path, str(wheel_path))
+        shutil.move(str(temp_path), str(wheel_path))
 
         logger.info(f"Built {self.wheel_filename}")
         return wheel_path

src/poetry/core/packages/dependency.py

@@ -396,9 +396,9 @@ def create_from_pep_508(
         elif req.url:
             link = Link(req.url)
         else:
-            path_str = os.path.normpath(os.path.abspath(name))
+            path_str = os.path.normpath(os.path.abspath(name))  # noqa: PTH100
             p, extras = strip_extras(path_str)
-            if os.path.isdir(p) and (os.path.sep in name or name.startswith(".")):
+            if p.is_dir() and (os.path.sep in name or name.startswith(".")):
                 if not is_python_project(Path(name)):
                     raise ValueError(
                         f"Directory {name!r} is not installable. Not a Python project."

src/poetry/core/packages/utils/utils.py

@@ -1,7 +1,6 @@
 from __future__ import annotations
 
 import functools
-import posixpath
 import re
 import sys
 
@@ -106,7 +105,7 @@ def is_url(name: str) -> bool:
     ]
 
 
-def strip_extras(path: str) -> tuple[str, str | None]:
+def strip_extras(path: str) -> tuple[Path, str | None]:
     m = re.match(r"^(.+)(\[[^\]]+\])$", path)
     extras = None
     if m:
@@ -115,7 +114,7 @@ def strip_extras(path: str) -> tuple[str, str | None]:
     else:
         path_no_extras = path
 
-    return path_no_extras, extras
+    return Path(path_no_extras), extras
 
 
 @functools.lru_cache(maxsize=None)
@@ -133,17 +132,19 @@ def is_python_project(path: Path) -> bool:
     return pyproject or setuptools_project
 
 
-def is_archive_file(name: str) -> bool:
+def is_archive_file(name: str | Path) -> bool:
     """Return True if `name` is a considered as an archive file."""
     ext = splitext(name)[1].lower()
     return ext in ARCHIVE_EXTENSIONS
 
 
-def splitext(path: str) -> tuple[str, str]:
-    """Like os.path.splitext, but take off .tar too"""
-    base, ext = posixpath.splitext(path)
+def splitext(path: str | Path) -> tuple[str, str]:
+    """Like pathlib.Path.stem and suffix, but take off .tar too"""
+    if isinstance(path, str):
+        path = Path(path)
+    base, ext = path.stem, path.suffix
     if base.lower().endswith(".tar"):
-        ext = base[-4:] + ext
+        ext = f"{base[-4:]}{ext}"
         base = base[:-4]
     return base, ext
 

src/poetry/core/utils/helpers.py

@@ -1,6 +1,5 @@
 from __future__ import annotations
 
-import os
 import shutil
 import stat
 import sys
@@ -29,16 +28,16 @@ def module_name(name: str) -> str:
 
 
 @contextmanager
-def temporary_directory(*args: Any, **kwargs: Any) -> Iterator[str]:
+def temporary_directory(*args: Any, **kwargs: Any) -> Iterator[Path]:
     if sys.version_info >= (3, 10):
         # mypy reports an error if ignore_cleanup_errors is
         # specified literally in the call
         kwargs["ignore_cleanup_errors"] = True
         with tempfile.TemporaryDirectory(*args, **kwargs) as name:
-            yield name
+            yield Path(name)
     else:
         name = tempfile.mkdtemp(*args, **kwargs)
-        yield name
+        yield Path(name)
         robust_rmtree(name)
 
 
@@ -80,10 +79,11 @@ def parse_requires(requires: str) -> list[str]:
 
 
 def _on_rm_error(func: Any, path: str | Path, exc_info: Any) -> None:
-    if not os.path.exists(path):
+    path = Path(path)
+    if not path.exists():
         return
 
-    os.chmod(path, stat.S_IWRITE)
+    path.chmod(stat.S_IWRITE)
     func(path)
 
 

tests/integration/test_pep517_backend.py

@@ -38,7 +38,9 @@ def test_pip_install(
 
     # Append dynamic `build-system` section to `pyproject.toml` in the temporary
     # project directory.
-    with open(temp_pep_517_backend_path / "pyproject.toml", "a", encoding="utf-8") as f:
+    with (temp_pep_517_backend_path / "pyproject.toml").open(
+        mode="a", encoding="utf-8"
+    ) as f:
         f.write(
             BUILD_SYSTEM_TEMPLATE.format(project_path=project_source_root.as_posix())
         )

tests/masonry/builders/test_complete.py

@@ -1,7 +1,6 @@
 from __future__ import annotations
 
 import csv
-import os
 import platform
 import re
 import shutil
@@ -121,7 +120,7 @@ def test_complete(project: str, no_vcs: bool) -> None:
 
     assert whl.exists()
     if sys.platform != "win32":
-        assert (os.stat(str(whl)).st_mode & 0o777) == 0o644
+        assert (whl.stat().st_mode & 0o777) == 0o644
 
     expected_name_list = [
         "my_package/__init__.py",

tests/masonry/builders/test_sdist.py

@@ -339,7 +339,7 @@ def test_setup_py_context(project_name: str) -> None:
             assert setup.exists()
             assert project_setup_py == setup
 
-            with open(str(setup), "rb") as f:
+            with setup.open(mode="rb") as f:
                 # we convert to string  and replace line endings here for compatibility
                 data = f.read().decode().replace("\r\n", "\n")
                 assert data == builder.build_setup().decode()