Use venv API to get venv paths

src/pipx/shared_libs.py

@@ -24,7 +24,7 @@
 class _SharedLibs:
     def __init__(self) -> None:
         self.root = constants.PIPX_SHARED_LIBS
-        self.bin_path, self.python_path = get_venv_paths(self.root)
+        self.bin_path, self.python_path = get_venv_paths(DEFAULT_PYTHON, self.root)
         self.pip_path = self.bin_path / ("pip" if not WINDOWS else "pip.exe")
         # i.e. bin_path is ~/.local/pipx/shared/bin
         # i.e. python_path is ~/.local/pipx/shared/python

src/pipx/util.py

@@ -112,19 +112,26 @@ def run_pypackage_bin(bin_path: Path, args: List[str]) -> NoReturn:
     )
 
 
-if WINDOWS:
-
-    def get_venv_paths(root: Path) -> Tuple[Path, Path]:
-        bin_path = root / "Scripts"
-        python_path = bin_path / "python.exe"
-        return bin_path, python_path
-
-else:
-
-    def get_venv_paths(root: Path) -> Tuple[Path, Path]:
-        bin_path = root / "bin"
-        python_path = bin_path / "python"
-        return bin_path, python_path
+def get_venv_paths(python: str, root: Path) -> Tuple[Path, Path]:
+    command_str = textwrap.dedent(
+        f"""
+        import venv
+        root_paths = venv.EnvBuilder().ensure_directories(r"{str(root)}")
+        print(root_paths.bin_path + ";" + root_paths.env_exe)
+        """
+    )
+    output = (
+        run_subprocess(
+            [python, "-c", command_str],
+            capture_stderr=False,
+            log_cmd_str="<get_venv_paths commands>",
+        )
+        .stdout.strip()
+        .split(";")
+    )
+    bin_path = Path(output[0])
+    python_path = Path(output[1])
+    return bin_path, python_path
 
 
 def get_site_packages(python: Path) -> Path:

src/pipx/venv.py

@@ -89,7 +89,7 @@ def __init__(
     ) -> None:
         self.root = path
         self.python = python
-        self.bin_path, self.python_path = get_venv_paths(self.root)
+        self.bin_path, self.python_path = get_venv_paths(python, self.root)
         self.pipx_metadata = PipxMetadata(venv_dir=path)
         self.verbose = verbose
         self.do_animation = not verbose

tests/helpers.py

@@ -9,7 +9,7 @@
 from packaging.utils import canonicalize_name
 
 from package_info import PKG
-from pipx import constants, main, pipx_metadata_file, util
+from pipx import constants, interpreter, main, pipx_metadata_file, util
 
 WIN = sys.platform.startswith("win")
 
@@ -168,7 +168,9 @@ def assert_package_metadata(test_metadata, ref_metadata):
 
 
 def remove_venv_interpreter(venv_name):
-    _, venv_python_path = util.get_venv_paths(constants.PIPX_LOCAL_VENVS / venv_name)
+    _, venv_python_path = util.get_venv_paths(
+        interpreter.DEFAULT_PYTHON, constants.PIPX_LOCAL_VENVS / venv_name
+    )
     assert venv_python_path.is_file()
     venv_python_path.unlink()
     assert not venv_python_path.is_file()