index: improved the way stdout is handled as the previous handling rarely caused lockups while waiting for stdout

NOTE: This does not have the desired effect, the issue appears to be somewhere within git, possibly, as git simply does not terminate waiting for something, even if stdout is closed.

Author: Byron

lib/git/index.py

@@ -926,7 +926,7 @@ def add(self, items, force=True, fprogress=lambda *args: None):
 				self._write_path_to_stdin(proc, filepath, filepath, make_exc, fprogress, read_from_stdout=False)
 				added_files.append(filepath)
 			# END for each filepath
-			self._flush_stdin_and_wait(proc)	# ignore stdout
+			self._flush_stdin_and_wait(proc, ignore_stdout=True)	# ignore stdout
 
 			# force rereading our entries once it is all done
 			del(self.entries)
@@ -978,7 +978,7 @@ def add(self, items, force=True, fprogress=lambda *args: None):
 				if not progress_sent:
 					fprogress(entry.path, True, entry)
 			# END for each enty
-			self._flush_stdin_and_wait(proc)
+			self._flush_stdin_and_wait(proc, ignore_stdout=True)
 			entries_added.extend(entries)
 		# END if there are base entries
 
@@ -1059,10 +1059,13 @@ def commit(self, message, parent_commits=None, head=True):
 		return Commit.create_from_tree(self.repo, tree_sha, message, parent_commits, head)
 
 	@classmethod
-	def _flush_stdin_and_wait(cls, proc):
+	def _flush_stdin_and_wait(cls, proc, ignore_stdout = False):
 		proc.stdin.flush()
 		proc.stdin.close()
-		stdout = proc.stdout.read()
+		stdout = ''
+		if not ignore_stdout:
+			stdout = proc.stdout.read()
+		proc.stdout.close()
 		proc.wait()
 		return stdout
 
@@ -1192,7 +1195,7 @@ def handle_stderr(proc, iter_checked_out_files):
 					checked_out_files.append(path)
 				# END path is a file
 			# END for each path
-			self._flush_stdin_and_wait(proc)
+			self._flush_stdin_and_wait(proc, ignore_stdout=True)
 
 			handle_stderr(proc, checked_out_files)
 			return checked_out_files

lib/git/utils.py

@@ -139,7 +139,7 @@ def _has_lock(self):
 			raise AssertionError("The lock file at %s could not be read" % lock_file)
 
 		if pid != os.getpid():
-			raise AssertionError("We claim to own the lock at %s, but it was not owned by our process: %i" % (lock_file, os.getpid()))
+			raise AssertionError("We claim to own the lock at %s, but it was not owned by our process %i, but by %i" % (lock_file, os.getpid(), pid))
 
 		return True