How does one ediff a current file--ie working tree--against an arbitrary version in some previous commit?
In this case, I'm interested in pulling in some, but not all, changes from a commit in another feature branch that was rejected.
I can't think of a one-step way to do this. The best I can come up with is
Type dr (
magit-diff), and set the range to the commit
If point is on the commit, you can copy it with C-w before calling dr.
In the diff buffer, go to the file you want and hit e
Though you might consider doing away with the ediff step. You can hit v to reverse a hunk at point in the working tree.