check-google-java-format.py 文件源码

def under_git(dir, filename):
    """Return true if filename in dir is under git control."""
    if not spawn.find_executable("git"):
        if debug:
            print("no git executable found")
        return False
    FNULL = open(os.devnull, 'w')
    p = subprocess.Popen(["git", "ls-files", filename, "--error-unmatch"], cwd=dir, stdout=FNULL, stderr=subprocess.STDOUT)
    p.wait()
    if debug:
        print("p.returncode", p.returncode)
    return p.returncode == 0

# Don't replace local with remote if local is under version control.
# It would be better to just test whether the remote is newer than local,
# But raw GitHub URLs don't have the necessary last-modified information.