Made remote line parsing more stable. On windows it can be that we encounter partial or intermixed lines from the pipe. This really shouldn't be, but its windows so it happens

Author: Byron

.gitmodules

@@ -1,3 +1,3 @@
-[submodule "gitdb"]
-	path = git/ext/gitdb
-	url = git://github.com/gitpython-developers/gitdb.git
+[submodule "gitdb"]
+	path = git/ext/gitdb
+	url = git://github.com/gitpython-developers/gitdb.git

git/remote.py

@@ -49,7 +49,7 @@ def digest_process_messages(fh, progress):
 		if not char:
 			break
 
-		if char in ('\r', '\n'):
+		if char in ('\r', '\n') and line_so_far:
 			dropped_lines.extend(progress._parse_progress_line(line_so_far))
 			line_so_far = ''
 		else:
@@ -510,7 +510,7 @@ def _get_fetch_info_from_stderr(self, proc, progress):
 		fetch_head_info = fp.readlines()
 		fp.close()
 
-		assert len(fetch_info_lines) == len(fetch_head_info)
+		assert len(fetch_info_lines) == len(fetch_head_info), "len(%s) != len(%s)" % (fetch_head_info, fetch_info_lines)
 
 		output.extend(FetchInfo._from_line(self.repo, err_line, fetch_line) 
 						for err_line,fetch_line in zip(fetch_info_lines, fetch_head_info))

git/util.py

@@ -176,7 +176,18 @@ def _parse_progress_line(self, line):
 			elif op_name == 'Resolving deltas':
 				op_code |= self.RESOLVING
 			else:
-				raise ValueError("Operation name %r unknown" % op_name)
+				# Note: On windows it can happen that partial lines are sent
+				# Hence we get something like "CompreReceiving objects", which is 
+				# a blend of "Compressing objects" and "Receiving objects".
+				# This can't really be prevented, so we drop the line verbosely
+				# to make sure we get informed in case the process spits out new
+				# commands at some point.
+				self.line_dropped(sline)
+				sys.stderr.write("Operation name %r unknown - skipping line '%s'" % (op_name, sline))
+				# Note: Don't add this line to the failed lines, as we have to silently
+				# drop it
+				return failed_lines
+			# END handle op code
 
 			# figure out stage
 			if op_code not in self._seen_ops: