tahoe.py 文件源码

def _win32_popen(self, args, env, callback_trigger=None):
        # This is a workaround to prevent Command Prompt windows from opening
        # when spawning tahoe processes from the GUI on Windows, as Twisted's
        # reactor.spawnProcess() API does not allow Windows creation flags to
        # be passed to subprocesses. By passing 0x08000000 (CREATE_NO_WINDOW),
        # the opening of the Command Prompt window will be surpressed while
        # still allowing access to stdout/stderr. See:
        # https://twistedmatrix.com/pipermail/twisted-python/2007-February/014733.html
        import subprocess
        proc = subprocess.Popen(
            args, env=env, stdout=subprocess.PIPE, stderr=subprocess.STDOUT,
            universal_newlines=True, creationflags=0x08000000)
        output = BytesIO()
        for line in iter(proc.stdout.readline, ''):
            output.write(line.encode('utf-8'))
            self.line_received(line.rstrip())
            if callback_trigger and callback_trigger in line.rstrip():
                return proc.pid
        proc.poll()
        if proc.returncode:
            raise subprocess.CalledProcessError(proc.returncode, args)
        else:
            return output.getvalue()