Rev 4471: Tweaked version of Jam's fix for bug 162930, writing 0 length files to local transports. in http://people.ubuntu.com/~robertc/baz2.0/pending/zero-length-writes

[Robert Collins]

At http://people.ubuntu.com/~robertc/baz2.0/pending/zero-length-writes

------------------------------------------------------------
revno: 4471
revision-id: robertc at robertcollins.net-20090623015920-vaouua88qdeqtflw
parent: pqm at pqm.ubuntu.com-20090623003517-lrjel82rf7q6qjlc
committer: Robert Collins <robertc at robertcollins.net>
branch nick: zero-length-writes
timestamp: Tue 2009-06-23 11:59:20 +1000
message:
  Tweaked version of Jam's fix for bug 162930, writing 0 length files to local transports.
=== modified file 'bzrlib/transport/local.py'
--- a/bzrlib/transport/local.py	2009-03-23 14:59:43 +0000
+++ b/bzrlib/transport/local.py	2009-06-23 01:59:20 +0000
@@ -204,7 +204,8 @@
         except (IOError, OSError),e:
             self._translate_error(e, path)
         try:
-            fp.write(bytes)
+            if bytes:
+                fp.write(bytes)
             fp.commit()
         finally:
             fp.close()
@@ -285,7 +286,8 @@
     def put_bytes_non_atomic(self, relpath, bytes, mode=None,
                              create_parent_dir=False, dir_mode=None):
         def writer(fd):
-            os.write(fd, bytes)
+            if bytes:
+                os.write(fd, bytes)
         self._put_non_atomic_helper(relpath, writer, mode=mode,
                                     create_parent_dir=create_parent_dir,
                                     dir_mode=dir_mode)
@@ -370,7 +372,8 @@
         file_abspath, fd = self._get_append_file(relpath, mode=mode)
         try:
             result = self._check_mode_and_size(file_abspath, fd, mode=mode)
-            os.write(fd, bytes)
+            if bytes:
+                os.write(fd, bytes)
         finally:
             os.close(fd)
         return result