ah_bootstrap.py 文件源码

def _check_submodule_no_git(self):
        """
        Like ``_check_submodule_using_git``, but simply parses the .gitmodules file
        to determine if the supplied path is a git submodule, and does not exec any
        subprocesses.

        This can only determine if a path is a submodule--it does not perform
        updates, etc.  This function may need to be updated if the format of the
        .gitmodules file is changed between git versions.
        """

        gitmodules_path = os.path.abspath('.gitmodules')

        if not os.path.isfile(gitmodules_path):
            return False

        # This is a minimal reader for gitconfig-style files.  It handles a few of
        # the quirks that make gitconfig files incompatible with ConfigParser-style
        # files, but does not support the full gitconfig syntax (just enough
        # needed to read a .gitmodules file).
        gitmodules_fileobj = io.StringIO()

        # Must use io.open for cross-Python-compatible behavior wrt unicode
        with io.open(gitmodules_path) as f:
            for line in f:
                # gitconfig files are more flexible with leading whitespace; just
                # go ahead and remove it
                line = line.lstrip()

                # comments can start with either # or ;
                if line and line[0] in (':', ';'):
                    continue

                gitmodules_fileobj.write(line)

        gitmodules_fileobj.seek(0)

        cfg = RawConfigParser()

        try:
            cfg.readfp(gitmodules_fileobj)
        except Exception as exc:
            log.warn('Malformatted .gitmodules file: {0}\n'
                     '{1} cannot be assumed to be a git submodule.'.format(
                         exc, self.path))
            return False

        for section in cfg.sections():
            if not cfg.has_option(section, 'path'):
                continue

            submodule_path = cfg.get(section, 'path').rstrip(os.sep)

            if submodule_path == self.path.rstrip(os.sep):
                return True

        return False