инструмент для управления сериями патчей (tool to manage series of patches)
Статус выхода (Exit)
The exit status is 0 if the sub-command was successfully
executed, and 1 in case of error.
An exit status of 2 denotes that quilt did not do anything to
complete the command. This happens in particular when asking to
push when the whole stack is already pushed, or asking to pop
when the whole stack is already popped. This behavior is
intended to ease the scripting around quilt.
