__init__.py 文件源码

def run_command(self, cmd, show_stdout=True, cwd=None,
                    on_returncode='raise',
                    command_desc=None,
                    extra_environ=None, spinner=None):
        """
        Run a VCS subcommand
        This is simply a wrapper around call_subprocess that adds the VCS
        command name, and checks that the VCS is available
        """
        cmd = [self.name] + cmd
        try:
            return call_subprocess(cmd, show_stdout, cwd,
                                   on_returncode,
                                   command_desc, extra_environ,
                                   spinner)
        except OSError as e:
            # errno.ENOENT = no such file or directory
            # In other words, the VCS executable isn't available
            if e.errno == errno.ENOENT:
                raise BadCommand('Cannot find command %r' % self.name)
            else:
                raise  # re-raise exception if a different error occurred