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Issue #8876: distutils now falls back to copying files when hard linking doesn't work.

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This allows use with special filesystems such as VirtualBox shared folders.
This commit is contained in:
Antoine Pitrou 2014-10-30 19:38:33 +01:00
commit aea7f4a8e2
3 changed files with 55 additions and 14 deletions
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32
Lib/distutils/tests/test_file_util.py
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@ -5,7 +5,7 @@ import shutil
import errno
from unittest.mock import patch
from distutils.file_util import move_file
from distutils.file_util import move_file, copy_file
from distutils import log
from distutils.tests import support
from distutils.errors import DistutilsFileError
@ -78,6 +78,36 @@ class FileUtilTestCase(support.TempdirManager, unittest.TestCase):
fobj.write('spam eggs')
move_file(self.source, self.target, verbose=0)
def test_copy_file_hard_link(self):
with open(self.source, 'w') as f:
f.write('some content')
st = os.stat(self.source)
copy_file(self.source, self.target, link='hard')
st2 = os.stat(self.source)
st3 = os.stat(self.target)
self.assertTrue(os.path.samestat(st, st2), (st, st2))
self.assertTrue(os.path.samestat(st2, st3), (st2, st3))
with open(self.source, 'r') as f:
self.assertEqual(f.read(), 'some content')
def test_copy_file_hard_link_failure(self):
# If hard linking fails, copy_file() falls back on copying file
# (some special filesystems don't support hard linking even under
# Unix, see issue #8876).
with open(self.source, 'w') as f:
f.write('some content')
st = os.stat(self.source)
with patch("os.link", side_effect=OSError(0, "linking unsupported")):
copy_file(self.source, self.target, link='hard')
st2 = os.stat(self.source)
st3 = os.stat(self.target)
self.assertTrue(os.path.samestat(st, st2), (st, st2))
self.assertFalse(os.path.samestat(st2, st3), (st2, st3))
for fn in (self.source, self.target):
with open(fn, 'r') as f:
self.assertEqual(f.read(), 'some content')
def test_suite():
return unittest.makeSuite(FileUtilTestCase)