What about using webcreate/vcs

[jeanmonod]

https://github.com/webcreate/vcs

[krtek4]

The interface proposed in the library seems a bit different than the one RMT is using, but an adaptation seems doable.

I am however not really convinced by some proposed methodes, for example ls or cat, not sure that a VCS Interface should propose those kind of thing. Or at least, those methods should provide a way to provide a revision and then use the underlying VCA command.

It would add SVN support to RMT, but we will have to convert / add the Mercurial support to the new library.