Fix #145

setup.cfg

@@ -76,7 +76,6 @@ testpaths = tests/
 norecursedirs = .* build dist news tasks docs
 markers =
     parse
-    skip_nt
     is_python
 filterwarnings =
     ignore::DeprecationWarning

src/pythonfinder/environment.py

@@ -3,8 +3,6 @@
 import os
 import platform
 import sys
-import posixpath
-import ntpath
 import re
 import shutil
 
@@ -21,28 +19,30 @@ def possibly_convert_to_windows_style_path(path):
     if not isinstance(path, str):
         path = str(path)
     # Check if the path is in Unix-style (Git Bash)
-    if os.name == 'nt':
-        if path.startswith('/'):
-            drive, tail = re.match(r"^/([a-zA-Z])/(.*)", path).groups()
-            revised_path = drive.upper() + ":\\" + tail.replace('/', '\\')
-            return revised_path
-        elif path.startswith('\\'):
-            drive, tail = re.match(r"^\\([a-zA-Z])\\(.*)", path).groups()
-            revised_path = drive.upper() + ":\\" + tail.replace('\\', '\\')
-            return revised_path
-
+    if os.name != 'nt':
+        return path
+    if os.path.exists(path):
+        return path
+    match = re.match(r"[/\\]([a-zA-Z])[/\\](.*)", path)
+    if match is None:
+        return path
+    drive, rest_of_path = match.groups()
+    rest_of_path = rest_of_path.replace("/", "\\")
+    revised_path = f"{drive.upper()}:\\{rest_of_path}"
+    if os.path.exists(revised_path):
+        return revised_path
     return path
 
 
 PYENV_ROOT = os.path.expanduser(
     os.path.expandvars(os.environ.get("PYENV_ROOT", "~/.pyenv"))
 )
 PYENV_ROOT = possibly_convert_to_windows_style_path(PYENV_ROOT)
-PYENV_INSTALLED = shutil.which("pyenv") != None
+PYENV_INSTALLED = shutil.which("pyenv") is not None
 ASDF_DATA_DIR = os.path.expanduser(
     os.path.expandvars(os.environ.get("ASDF_DATA_DIR", "~/.asdf"))
 )
-ASDF_INSTALLED = shutil.which("asdf") != None
+ASDF_INSTALLED = shutil.which("asdf") is not None
 IS_64BIT_OS = None
 SYSTEM_ARCH = platform.architecture()[0]
 
@@ -61,20 +61,9 @@ def possibly_convert_to_windows_style_path(path):
 """
 
 
-def join_path_for_platform(path, path_parts):
-    # If we're on Unix or Unix-like system
-    if os.name == 'posix' or sys.platform == 'linux':
-        return posixpath.join(path, *path_parts)
-    # If we're on Windows
-    elif os.name == 'nt' or sys.platform == 'win32':
-        return ntpath.join(path, *path_parts)
-    else:
-        raise Exception("Unknown environment")
-
-
 def set_asdf_paths():
     if ASDF_INSTALLED:
-        python_versions = join_path_for_platform(ASDF_DATA_DIR, ["installs", "python"])
+        python_versions = os.path.join(ASDF_DATA_DIR, "installs", "python")
         try:
             # Get a list of all files and directories in the given path
             all_files_and_dirs = os.listdir(python_versions)
@@ -92,10 +81,10 @@ def set_pyenv_paths():
     if PYENV_INSTALLED:
         is_windows = False
         if os.name == "nt":
-            python_versions = join_path_for_platform(PYENV_ROOT, ["pyenv-win", "versions"])
+            python_versions = os.path.join(PYENV_ROOT, "pyenv-win", "versions")
             is_windows = True
         else:
-            python_versions = join_path_for_platform(PYENV_ROOT, ["versions"])
+            python_versions = os.path.join(PYENV_ROOT, "versions")
         try:
             # Get a list of all files and directories in the given path
             all_files_and_dirs = os.listdir(python_versions)

tests/conftest.py

@@ -24,11 +24,6 @@
 pythoninfo = namedtuple("PythonVersion", ["name", "version", "path", "arch"])
 
 
-def pytest_runtest_setup(item):
-    if item.get_closest_marker("skip_nt") is not None and os.name == "nt":
-        pytest.skip("does not run on windows")
-
-
 @pytest.fixture
 def pathlib_tmpdir(request, tmpdir):
     yield Path(str(tmpdir))

tests/test_environment.py

@@ -0,0 +1,28 @@
+from __future__ import annotations
+
+import os
+import re
+import tempfile
+
+import pytest
+
+from pythonfinder.environment import possibly_convert_to_windows_style_path
+
+
+@pytest.mark.skipif(os.name != 'nt', reason="Only run on Windows")
+def test_possibly_convert_to_windows_style_path():
+    # Create a temporary directory
+    with tempfile.TemporaryDirectory() as tmpdirname:
+        # Get an input path in the form "\path\to\tempdir"
+        drive, tail = os.path.splitdrive(tmpdirname)
+        input_path = tail.replace('/', '\\')
+        assert re.match(r"(\\[^/\\]+)+", input_path)
+        revised_path = possibly_convert_to_windows_style_path(input_path)
+        assert input_path == revised_path
+
+        # Get an input path in the form "/c/path/to/tempdir"
+        input_path = '/' + drive[0].lower() + tail.replace('\\', '/')
+        assert re.match(r"/[a-z](/[^/\\]+)+", input_path)
+        expected = drive.upper() + tail.replace('/', '\\')
+        revised_path = possibly_convert_to_windows_style_path(input_path)
+        assert expected == revised_path

tests/test_python.py

@@ -95,6 +95,6 @@ def get_python_version(path, orig_fn=None):
         assert isinstance(parsed.version, Version)
 
 
-@pytest.mark.skip_nt
+@pytest.mark.skipif(os.name == "nt", reason="Does not run on Windows")
 def test_pythonfinder(expected_python_versions, all_python_versions):
     assert sorted(expected_python_versions) == sorted(all_python_versions)