Manage remotes

[smashwilson]

Provide some kind of UI to create, retrieve, update, and delete a repository's remotes.

We should especially support a workflow popular in the open-source world that uses a forked repository as a head for contributor pull requests:

1. A contributor forks the repository on GitHub
2. The contributor clones the repository to their laptop from their personal fork, adding it as a remote called origin.
3. The contributor adds a remote, often called upstream, pointing to the parent repository on GitHub.
4. The contributor pushes branches containing work to be integrated to origin, their personal fork.
5. To integrate changes from other contributors, the contributor pulls from the master branch on the upstream remote and either merges in the fetched changes or rebases on top of them.

[kuychaco]

@simurai can we get your thoughts on UI around this? We may not get around to it in the super near term, but it'd be nice to get a discussion started around how best to approach this 💭

[simurai]

There is some exploration about branch management in #556:

• You can switch tracking by right-clicking on a remote branch and then choose "Track" from the context-menu.

But not sure about the "The contributor adds a remote"? Maybe have a toolbar at the bottom with a [+ Add remote] button? Clicking that would show a list of all forks (if that's not too performance hungry) and also an input to filter or paste a URL. Maybe the first item in the list could be the "upstream" remote.

Anyways, I guess before we start with this, we would need #556 first.

[sromocki]

I was prompted to select a remote for a branch at one point while using this integration. I selected one and it says it's not found. Is it possible to change the remote again after initially selecting one? I also tried to manually enter the PR URL although it's not able to find the PR either so I'm a bit stuck. Wondering if this has to do with my organization's authorization.

[rsese]

From #1679:

One thing that I think Atom's git integration does very poorly with at the moment is remote management. I'd like to be able to interactively choose which remotes I fetch/pull/rebase from or push to, and I can't do that at the moment.

Ideally, I'd like to see a right-click menu option for "Pull from..." and "Push to..." to get prompted for the remote, and have the option for that interactive prompt to be the default action (i.e. always prompt me which remote I want for the action).