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I've finally decided to copy Git's branching model (issue #21), except that I'm letting the name identify the branch across remotes. Actually, now that I think about, that makes them more like Mercurial's "bookmarks". Each branch will record the commit it points to locally, as well as the commits it points to on each remote (as far as the repo knows, of course). Those records are effectively the same thing as Git's "remote-tracking branches"; the difference is that we consider them the same branch. Consequently, when you pull a new branch from a remote, we'll create that branch locally. For example, if you pull branch "main" from a remote called "origin", that will result in a local branch called "main", and also a record of the position on the remote, which we'll show as "main@origin" in the CLI (not part of this commit). If you then update the branch locally and also pull a new target for it from "origin", the local "main" branch will be divergent. I plan to make it so that pushing "main" will update the remote's "main" iff it was currently at "main@origin" (i.e. like using Git's `git push --force-with-lease`). This commit adds a place to store information about branches in the view model. The existing git_refs field will be used as input for the branch information. For example, we can use it to tell if "refs/heads/main" has changed and how it has changed. We will then use that ref diff to update our own record of the "main" branch. That will come later. In order to let git_refs take a back seat, I've also added tags (like Git's lightweight tags) to the model in this commit. I haven't ruled out *also* having some more persistent type of branches (like Mercurials branches or topics). |
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