mx.py 文件源码

def needsBuild(self, newestInput):
        logv('Checking whether to build {} with GNU Make'.format(self.subject.name))
        cmdline, cwd, env = self._build_run_args()
        cmdline += ['-q']

        if _opts.verbose:
            # default out/err stream
            ret_code = run(cmdline, cwd=cwd, env=env, nonZeroIsFatal=False)
        else:
            with open(os.devnull, 'w') as fnull:
                # suppress out/err (redirect to null device)
                ret_code = run(cmdline, cwd=cwd, env=env, nonZeroIsFatal=False, out=fnull, err=fnull)

        if ret_code != 0:
            return (True, "rebuild needed by GNU Make")
        return (False, "up to date according to GNU Make")