1 files changed, 70 insertions, 0 deletions
diff --git a/bzrlib/transport/fakenfs.py b/bzrlib/transport/fakenfs.py
new file mode 100644
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+++ b/bzrlib/transport/fakenfs.py
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+# Copyright (C) 2005, 2006, 2008 Canonical Ltd
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+
+"""Transport implementation that adapts another transport to look like NFS.
+
+Currently this means that the rename() call will raise ResourceBusy when a
+target path is a directory.
+
+To get a fake nfs transport use get_transport('fakenfs+' + real_url)
+"""
+
+from __future__ import absolute_import
+
+from stat import S_ISDIR
+
+from bzrlib import (
+    errors,
+    urlutils,
+    )
+from bzrlib.transport import decorator
+
+
+class FakeNFSTransportDecorator(decorator.TransportDecorator):
+    """A transport that behaves like NFS, for testing"""
+
+    @classmethod
+    def _get_url_prefix(self):
+        """FakeNFS transports are identified by 'fakenfs+'"""
+        return 'fakenfs+'
+
+    def rename(self, rel_from, rel_to):
+        """See Transport.rename().
+
+        This variation on rename converts DirectoryNotEmpty and FileExists
+        errors into ResourceBusy if the target is a directory.
+        """
+        try:
+            self._decorated.rename(rel_from, rel_to)
+        except (errors.DirectoryNotEmpty, errors.FileExists), e:
+            # if this is a directory rename, raise
+            # resourcebusy rather than DirectoryNotEmpty
+            stat = self._decorated.stat(rel_to)
+            if S_ISDIR(stat.st_mode):
+                raise errors.ResourceBusy(rel_to)
+            else:
+                raise
+
+    def delete(self, relpath):
+        if urlutils.basename(relpath).startswith('.nfs'):
+            raise errors.ResourceBusy(self.abspath(relpath))
+        return self._decorated.delete(relpath)
+
+
+def get_test_permutations():
+    """Return the permutations to be used in testing."""
+    from bzrlib.tests import test_server
+    return [(FakeNFSTransportDecorator, test_server.FakeNFSServer),]