Allow URL invoking git remote helper

[traidare]

While I was trying to use git-remote-hg to work with a Mercurial repository using git, I noticed that using git-grab to clone a repository using an URL like hg::http://selenic.com/repo/hello returns an invalid hostname error.

I am assuming any intentional invocation of remote helper programs through URLs of the form <transport>::<address> would error the same.

[wezm]

I noticed that using git-grab to clone a repository using an URL like hg::http://selenic.com/repo/hello returns an invalid hostname error.

Yes git-grab tries to parse the clone source as a URL so that it can extract the hostname and path components to build the clone path. hg::http://selenic.com/repo/hello is not a valid URL. Support for remote transports will need to be added to support them:

A URL of the form ::

explicitly instructs Git to invoke git remote- with as the second argument.