cargo should add option to install HEAD versions

[erickt]

I'd like to keep my cargo crates pinned to a 0.3 compatible version, but keep working on later versions to shake out rustc bugs. Can cargo grow a cargo install --ref HEAD option to override any baked in revisions?

[z0w0]

Does cargo install git://github.com/blah/blah HEAD and adding ref: "HEAD" to packages.json not add that functionality, or am I missing something? Cargo is still terribly out-dated at the moment and is still rolling-release, so I'm afraid there's not much you can do right now.

EDIT: Oh, I see. You want to add a command line option that manually details that you want the latest HEAD. No, you can't do that yet. I think it's a good idea, but it might be better to just add versions instead.

[z0w0]

Closing because Cargo is obsolete as of version 0.6. FTR rustpkg will be based around version control by default.