Detect the python version based on the py launcher
@@ -9,6 +9,7 @@ from pre_commit.envcontext import UNSET
from pre_commit.envcontext import Var
from pre_commit.languages import helpers
from pre_commit.parse_shebang import find_executable
+from pre_commit.util import CalledProcessError
from pre_commit.util import clean_path_on_failure
from pre_commit.util import cmd_output
from pre_commit.xargs import xargs
@@ -40,6 +41,17 @@ def in_env(repo_cmd_runner, language_version):
yield
+def _find_by_py_launcher(version): # pragma: no cover (windows only)
+ if version.startswith('python'):
+ try:
+ return cmd_output(
+ 'py', '-{}'.format(version[len('python'):]),
+ '-c', 'import sys; print(sys.executable)',
+ )[1].strip()
+ except CalledProcessError:
+ pass
+
+
def _get_default_version(): # pragma: no cover (platform dependent)
def _norm(path):
_, exe = os.path.split(path.lower())
@@ -66,6 +78,9 @@ def _get_default_version(): # pragma: no cover (platform dependent)
if find_executable(exe):
return exe
+ if _find_by_py_launcher(exe):
+ return exe
+
# Give a best-effort try for windows
if os.path.exists(r'C:\{}\python.exe'.format(exe.replace('.', ''))):
return exe
@@ -99,6 +114,10 @@ def norm_version(version):
if version_exec and version_exec != version:
return version_exec
+ version_exec = _find_by_py_launcher(version)
+ if version_exec:
+ return version_exec
+
# If it is in the form pythonx.x search in the default
# place on windows
if version.startswith('python'):
