pathspec.py 文件源码

def walkPackagePath(self, path):
        """Legacy path walking.

        Does not support any advanced query features. Guarenteed to return only
        a single package. If any path element is not found a error is thrown.
        """
        # replace aliases
        path = self.__substAlias(path)

        # walk packages
        thisPackage = self.getRootPackage()
        steps = [ s for s in path.split("/") if s != "" ]
        if steps == []:
            raise BobError("'{}' is not a valid package path".format(path))
        for step in steps:
            nextPackages = { s.getPackage().getName() : s.getPackage()
                for s in thisPackage.getDirectDepSteps() }
            for s in thisPackage.getIndirectDepSteps():
                p = s.getPackage()
                nextPackages.setdefault(p.getName(), p)
            if step not in nextPackages:
                stack = thisPackage.getStack()
                raise BobError("Package '{}' not found under '{}'"
                                    .format(step, "/".join(stack) if stack != [''] else "/"))
            thisPackage = nextPackages[step]

        return thisPackage