Is there something like a blamed diff?

When comparing two branches, decorating the flat diff with the respectively responsible commits seems like it would be nice to do/have (the blame on the identical parts, in contrast, is not really interesting). Is there any tool that provides something like that?

David Kastrup <dak@gnu.org> writes:

This seems to come up every year or so:

http://thread.gmane.org/gmane.comp.version-control.git/110369/focus=110383

Thomas Rast <tr@thomasrast.ch> writes:

Nice. That one could likely be sped up by calling git-blame just once on each file with multiple -L options.

Though actually with the current implementation of git-blame you are likely faster for a large number of differences by doing each region separately anyway since then the cost for digging through the history is obviously O(n) for n consecutive runs on n chunks while the administrative overhead for several chunks in a single run is O(n^2) at the moment.

David Kastrup <dak@gnu.org> writes:

Yes. You'll note that the email predates the support for multiple -L options by a few years :-)

I never had a need for such a script, I just wrote that in response to someone asking about it. If you find it useful, please clean it up for inclusion in contrib/.