How can I view multiple git diffs side by side in vim

Question

I'd like to be able to run a command that opens up a git diff in vim, with a tab for each file in the diff set.

So if for example I've changed files foo.txt and bar.txt in my working tree and I ran the command I would see vim open with two tabs. The first tab would contain a side-by-side diff between foo.txt in my working tree and foo.txt in the repository, and the second tab would contain a side-by-side diff for bar.txt.

Anyone got any ideas?

Answer 1

Adapted Benjamin Bannier + Dave Kirby's answer above for fugitive users.

Because I use fugitive.vim, I adapted the above for my most frequent use case, looking at the diff between the last 2 commits:

vim -p $(git diff --name-only HEAD~1 HEAD) -c "tabdo :Gdiff HEAD~1"

Loading all the changes into tabs is so much better than going through them sequentially with git difftool.

Answer 2

The way I would do this (though it isn't a single command)

1. Open files with changes in new vim tabs:

   vim -p $(git diff --name-only)

2. For every buffer get the diff to your current HEAD with the vcscommand vim plugin

   :VCSVimDiff

This gives a nice view of the difference, though not in patch form.

For anything else I would stick to git diff.

EDIT

Like Dave writes below, steps 1 and 2 can be combined by using

vim -p $(git diff --name-only) -c "tabdo VCSVimDiff"