Merge pull request #5 from saucoide/uv4

remove if statement & handle missing uv in the function

nox/virtualenv.py

@@ -69,12 +69,18 @@ def find_uv() -> tuple[bool, str]:
 
 
 def uv_version() -> version.Version:
- ret = subprocess.run(
- [UV, "version", "--output-format", "json"],
- check=False,
- text=True,
- capture_output=True,
- )
+ """Returns uv's version defaulting to 0.0 if uv is not available"""
+ try:
+ ret = subprocess.run(
+ [UV, "version", "--output-format", "json"],
+ check=False,
+ text=True,
+ capture_output=True,
+ )
+ except FileNotFoundError:
+ logger.info("uv binary not found.")
+ return version.Version("0.0")
+
  if ret.returncode == 0 and ret.stdout:
  return version.Version(json.loads(ret.stdout).get("version"))
  else:
@@ -92,10 +98,9 @@ def uv_install_python(python_version: str) -> bool:
 
 
 HAS_UV, UV = find_uv()
-if HAS_UV:
- # supported since uv 0.3 but 0.4.16 is the first version that doesn't cause
- # issues for nox with pypy/cpython confusion
- UV_PYTHON_SUPPORT = uv_version() >= version.Version("0.4.16")
+# supported since uv 0.3 but 0.4.16 is the first version that doesn't cause
+# issues for nox with pypy/cpython confusion
+UV_PYTHON_SUPPORT = uv_version() >= version.Version("0.4.16")
 
 
 class InterpreterNotFound(OSError):

tests/test_virtualenv.py

@@ -633,7 +633,7 @@ def find_uv_bin():
  (1, '{"version": "9.9.9", "commit_info": null}', "0.0"),
  ],
 )
-def test_uv_version_error(monkeypatch, return_code, stdout, expected_result):
+def test_uv_version(monkeypatch, return_code, stdout, expected_result):
  def mock_run(*args, **kwargs):
  return subprocess.CompletedProcess(
  args=["uv", "version", "--output-format", "json"],
@@ -645,6 +645,14 @@ def mock_run(*args, **kwargs):
  assert nox.virtualenv.uv_version() == version.Version(expected_result)
 
 
+def test_uv_version_no_uv(monkeypatch):
+ def mock_exception(*args, **kwargs):
+ raise FileNotFoundError
+
+ monkeypatch.setattr(subprocess, "run", mock_exception)
+ assert nox.virtualenv.uv_version() == version.Version("0.0")
+
+
 @pytest.mark.parametrize(
  ["requested_python", "expected_result"],
  [