Merge with 3.3 for Issue #19286.

Lib/distutils/command/build_py.py

@@ -127,7 +127,8 @@ class build_py (Command):
             # Each pattern has to be converted to a platform-specific path
             filelist = glob(os.path.join(src_dir, convert_path(pattern)))
             # Files that match more than one pattern are only added once
-            files.extend([fn for fn in filelist if fn not in files])
+            files.extend([fn for fn in filelist if fn not in files
+                and os.path.isfile(fn)])
         return files
 
     def build_package_data(self):

Lib/distutils/tests/test_build_py.py

@@ -123,6 +123,37 @@ class BuildPyTestCase(support.TempdirManager,
         self.assertEqual(sorted(found),
                          ['boiledeggs.%s.pyo' % sys.implementation.cache_tag])
 
+    def test_dir_in_package_data(self):
+        """
+        A directory in package_data should not be added to the filelist.
+        """
+        # See bug 19286
+        sources = self.mkdtemp()
+        pkg_dir = os.path.join(sources, "pkg")
+
+        os.mkdir(pkg_dir)
+        open(os.path.join(pkg_dir, "__init__.py"), "w").close()
+
+        docdir = os.path.join(pkg_dir, "doc")
+        os.mkdir(docdir)
+        open(os.path.join(docdir, "testfile"), "w").close()
+
+        # create the directory that could be incorrectly detected as a file
+        os.mkdir(os.path.join(docdir, 'otherdir'))
+
+        os.chdir(sources)
+        dist = Distribution({"packages": ["pkg"],
+                             "package_data": {"pkg": ["doc/*"]}})
+        # script_name need not exist, it just need to be initialized
+        dist.script_name = os.path.join(sources, "setup.py")
+        dist.script_args = ["build"]
+        dist.parse_command_line()
+
+        try:
+            dist.run_commands()
+        except DistutilsFileError:
+            self.fail("failed package_data when data dir includes a dir")
+
     def test_dont_write_bytecode(self):
         # makes sure byte_compile is not used
         dist = self.create_dist()[1]

Misc/NEWS

@@ -31,6 +31,9 @@ Core and Builtins
 Library
 -------
 
+- Issue #19286: Directories in ``package_data`` are no longer added to
+  the filelist, preventing failure outlined in the ticket.
+
 - Issue #15114: The html.parser module now raises a DeprecationWarning when the
   strict argument of HTMLParser or the HTMLParser.error method are used.