[Python-checkins] cpython (3.3): - Issue #17012: shutil.which() no longer fallbacks to the PATH environment
barry.warsaw
python-checkins at python.org
Tue Apr 16 17:19:31 CEST 2013
http://hg.python.org/cpython/rev/eb8c575fa781
changeset: 83405:eb8c575fa781
branch: 3.3
parent: 83402:aec657f11b66
user: Barry Warsaw <barry at python.org>
date: Tue Apr 16 11:05:03 2013 -0400
summary:
- Issue #17012: shutil.which() no longer fallbacks to the PATH environment
variable if empty path argument is specified. Patch by Serhiy Storchaka.
files:
Lib/shutil.py | 6 +++++-
Lib/test/test_shutil.py | 21 +++++++++++++++++++++
Misc/NEWS | 3 +++
3 files changed, 29 insertions(+), 1 deletions(-)
diff --git a/Lib/shutil.py b/Lib/shutil.py
--- a/Lib/shutil.py
+++ b/Lib/shutil.py
@@ -1091,7 +1091,11 @@
return cmd
return None
- path = (path or os.environ.get("PATH", os.defpath)).split(os.pathsep)
+ if path is None:
+ path = os.environ.get("PATH", os.defpath)
+ if not path:
+ return None
+ path = path.split(os.pathsep)
if sys.platform == "win32":
# The current directory takes precedence on Windows.
diff --git a/Lib/test/test_shutil.py b/Lib/test/test_shutil.py
--- a/Lib/test/test_shutil.py
+++ b/Lib/test/test_shutil.py
@@ -24,6 +24,7 @@
from test import support
from test.support import TESTFN, check_warnings, captured_stdout, requires_zlib
+from unittest.mock import patch
try:
import bz2
@@ -1352,6 +1353,26 @@
rv = shutil.which(self.file[:-4], path=self.dir)
self.assertEqual(rv, self.temp_file.name[:-4] + ".EXE")
+ def test_environ_path(self):
+ with support.EnvironmentVarGuard() as env:
+ env['PATH'] = self.dir
+ rv = shutil.which(self.file)
+ self.assertEqual(rv, self.temp_file.name)
+
+ def test_empty_path(self):
+ base_dir = os.path.dirname(self.dir)
+ with support.temp_cwd(path=self.dir), \
+ support.EnvironmentVarGuard() as env:
+ env['PATH'] = self.dir
+ rv = shutil.which(self.file, path='')
+ self.assertIsNone(rv)
+
+ def test_empty_path_no_PATH(self):
+ with support.EnvironmentVarGuard() as env:
+ env.pop('PATH', None)
+ rv = shutil.which(self.file)
+ self.assertIsNone(rv)
+
class TestMove(unittest.TestCase):
diff --git a/Misc/NEWS b/Misc/NEWS
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -29,6 +29,9 @@
Library
-------
+- Issue #17012: shutil.which() no longer fallbacks to the PATH environment
+ variable if empty path argument is specified. Patch by Serhiy Storchaka.
+
- Issue #17710: Fix pickle raising a SystemError on bogus input.
- Issue #17341: Include the invalid name in the error messages from re about
--
Repository URL: http://hg.python.org/cpython
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