Ignore .nfs* files in distutils (#7719).

These files are created by some NFS clients a file is edited and removed
concurrently (see added link in doc for more info).  If such a file is
removed between distutils calls listdir and copy, it will get confused.
Other special files are ignored in sdist (namely VCS directories), but
this has to be filtered out earlier.

5 files changed, 33 insertions, 8 deletions

diff --git a/Doc/distutils/apiref.rst b/Doc/distutils/apiref.rst
index e15dc76..74fba4a 100644
--- a/Doc/distutils/apiref.rst
+++ b/Doc/distutils/apiref.rst
@@ -992,6 +992,12 @@ directories.
    destination of the symlink will be copied.  *update* and *verbose* are the same
    as for :func:`copy_file`.
 
+   Files in *src* that begin with :file:`.nfs` are skipped (more information on
+   these files is available in answer D2 of the `NFS FAQ page
+   <http://nfs.sourceforge.net/#section_d>`_.
+
+   .. versionchanged:: 3.2.4
+      NFS files are ignored.
 
 .. function:: remove_tree(directory[, verbose=0, dry_run=0])
 
diff --git a/Lib/distutils/dir_util.py b/Lib/distutils/dir_util.py
index 30daf49..2826ff8 100644
--- a/Lib/distutils/dir_util.py
+++ b/Lib/distutils/dir_util.py
@@ -141,6 +141,10 @@ def copy_tree(src, dst, preserve_mode=1, preserve_times=1,
         src_name = os.path.join(src, n)
         dst_name = os.path.join(dst, n)
 
+        if n.startswith('.nfs'):
+            # skip NFS rename files
+            continue
+
         if preserve_symlinks and os.path.islink(src_name):
             link_dest = os.readlink(src_name)
             if verbose >= 1:
diff --git a/Lib/distutils/tests/test_dir_util.py b/Lib/distutils/tests/test_dir_util.py
index ce74589..1589f12 100644
--- a/Lib/distutils/tests/test_dir_util.py
+++ b/Lib/distutils/tests/test_dir_util.py
@@ -76,7 +76,6 @@ class DirUtilTestCase(support.TempdirManager, unittest.TestCase):
 
         remove_tree(self.root_target, verbose=0)
 
-
     def test_copy_tree_verbosity(self):
 
         mkpath(self.target, verbose=0)
@@ -88,11 +87,8 @@ class DirUtilTestCase(support.TempdirManager, unittest.TestCase):
 
         mkpath(self.target, verbose=0)
         a_file = os.path.join(self.target, 'ok.txt')
-        f = open(a_file, 'w')
-        try:
+        with open(a_file, 'w') as f:
             f.write('some content')
-        finally:
-            f.close()
 
         wanted = ['copying %s -> %s' % (a_file, self.target2)]
         copy_tree(self.target, self.target2, verbose=1)
@@ -101,6 +97,21 @@ class DirUtilTestCase(support.TempdirManager, unittest.TestCase):
         remove_tree(self.root_target, verbose=0)
         remove_tree(self.target2, verbose=0)
 
+    def test_copy_tree_skips_nfs_temp_files(self):
+        mkpath(self.target, verbose=0)
+
+        a_file = os.path.join(self.target, 'ok.txt')
+        nfs_file = os.path.join(self.target, '.nfs123abc')
+        for f in a_file, nfs_file:
+            with open(f, 'w') as fh:
+                fh.write('some content')
+
+        copy_tree(self.target, self.target2)
+        self.assertEqual(os.listdir(self.target2), ['ok.txt'])
+
+        remove_tree(self.root_target, verbose=0)
+        remove_tree(self.target2, verbose=0)
+
     def test_ensure_relative(self):
         if os.sep == '/':
             self.assertEqual(ensure_relative('/home/foo'), 'home/foo')
diff --git a/Lib/distutils/tests/test_sdist.py b/Lib/distutils/tests/test_sdist.py
index 1ba2a1a..e6359d6 100644
--- a/Lib/distutils/tests/test_sdist.py
+++ b/Lib/distutils/tests/test_sdist.py
@@ -83,9 +83,8 @@ class SDistTestCase(PyPIRCCommandTestCase):
 
     @unittest.skipUnless(ZLIB_SUPPORT, 'Need zlib support to run')
     def test_prune_file_list(self):
-        # this test creates a package with some vcs dirs in it
-        # and launch sdist to make sure they get pruned
-        # on all systems
+        # this test creates a project with some VCS dirs and an NFS rename
+        # file, then launches sdist to check they get pruned on all systems
 
         # creating VCS directories with some files in them
         os.mkdir(join(self.tmp_dir, 'somecode', '.svn'))
@@ -99,6 +98,8 @@ class SDistTestCase(PyPIRCCommandTestCase):
         self.write_file((self.tmp_dir, 'somecode', '.git',
                          'ok'), 'xxx')
 
+        self.write_file((self.tmp_dir, 'somecode', '.nfs0001'), 'xxx')
+
         # now building a sdist
         dist, cmd = self.get_cmd()
 
diff --git a/Misc/NEWS b/Misc/NEWS
index 3c9f382..02e4d48 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -177,6 +177,9 @@ Library
 
 - Issue #16628: Fix a memory leak in ctypes.resize().
 
+- Issue #7719: Make distutils ignore ``.nfs*`` files instead of choking later
+  on.  Initial patch by SilentGhost and Jeff Ramnani.
+
 - Issue #13120: Allow to call pdb.set_trace() from thread.
   Patch by Ilya Sandler.