magit: how to diff the same file between two different commits on the same branch?

Question

How can I get the diff between two commits of the same file using magit?

Directly form git one can do this. But I don't know how to do it from within magit. From magit-status it seems that d and D returns the diff of the whole repository. This is very problematic for me as the repository is huge and it causes magit (and in turn emacs) to become unresponsive. Is there a way to ask magit to restrict the search to only one file from the repository?

I also tried, in the magit-status buffer to do : diff $start_commit..$end_commit -- path/to/file. This works, but the output is a simple buffer without any highlighting nor any folding options...

Answer 1

In case anyone stumbles across this now, it is now possible to do this in magit (I do this from magit-log but you can probably do it from elsewhere, too):

1. Type d to open the magit-diff-popup
2. Type =f to specify the file you want to view (enter path relative to the project root dir)
3. Type r to do a diff range. You will be asked for the commit range, for example, 4abcde2..HEAD. Alternately, if you highlight the range of commits in magit-log, the range will be set for you automatically with no prompt.

This way, you end up in a magit-diff buffer complete with highlighting and code folding.

Answer 2

One way to go is to use vc as suggested by this related answer - in particular C-u C-x v =. However, this return a buffer without the possibility to (un)fold chunks.