how to make the editor gutter show lines changes against another branch, such as origin/main?

Question

As shown in the screen cap below, the gutter to the left of the editor shows line numbers and color indicators for which lines have changed (and what kind of change):

It shows the changes against the current HEAD.

How could I make it show changes against another branch, such as main or even a remote branch such as origin/main?

For example, if the same change was already made on origin/mainline, I want no color indicator to show at all.

Thank you!!!!!

Answer 1

You can do this with the Git Scope plugin

It adds a Git Scope tool window that looks much like the built-in Git tool window (or the Commit tool window if you have the Git non-modal interface enabled). In the Git Scope window you can select a different branch to be the basis of file change indicators:

Not only that:

• If you click on the color indicators, you can see the actual diff against the chosen branch.
• The Git Scope window shows all changed files against the chosen branch (much like the built-in git window shows all changed files against HEAD).
• As with the built-in window, you can right click on any file to or press ⌘D to see a full diff, or the Show Diff button to iterate over all file changes.
• In fact, as far as I can tell, Git-Scope changes the diff context for even the built-in commands for showing the diff of the currently open file.
• The Git Scope window has a toggle button to conveniently switch back and forth between normal mode (diffs against HEAD) and the Git Scope mode.