git: Branch diff

[ConradIrwin]

Note: It would be really nice if we could also show this information in the git panel, but the branch was getting long lived so I wanted to merge as is.

Release Notes:

• git: Adds the ability to view the diff of the current branch since main with git: Branch Diff from the command palette

[iamnbutler]

Oh my god. I want this so bad. I wanted this desperately this week.

Thank you for pushing on this 🙏

[gpxl-dev]

This is wonderful, obvious improvement to this feature would be to be able to select the branch to diff with, or at least have a setting to specify it

[birtles]

For anyone else coming here because this seems to pull up the wrong default branch, in my case it turned out to be because there was a different default branch in place at the point when I cloned the repository.

Internally it looks like Zed calls git symbolic-ref refs/remotes/origin/HEAD and uses the result of that if successful.

The get your local clone to reflect the updated default branch of the origin:

git remote set-head origin -a

[smackesey]

This is wonderful, obvious improvement to this feature would be to be able to select the branch to diff with, or at least have a setting to specify it

To add to this, ideally the branch could be dynamically determined. Users of stacked branch systems like Graphite often want to view the diff of the current branch against the parent branch. I'm a graphite user and I do this in the terminal using git difftool $(gt parent).