format-patch: add --interdiff option to embed diff in cover letter
commit126facf8219177bc265be725a8579c86ebdf99a5
authorEric Sunshine <sunshine@sunshineco.com>
Sun, 22 Jul 2018 09:57:05 +0000 (22 05:57 -0400)
committerJunio C Hamano <gitster@pobox.com>
Mon, 23 Jul 2018 19:50:06 +0000 (23 12:50 -0700)
tree951a68d3b89e0123c1ec0e75de85579a2609dce2
parentfa5b7ea670f4c5ee377e7fce799300829eabb291
format-patch: add --interdiff option to embed diff in cover letter

When submitting a revised version of a patch series, it can be helpful
(to reviewers) to include a summary of changes since the previous
attempt in the form of an interdiff, however, doing so involves manually
copy/pasting the diff into the cover letter.

Add an --interdiff option to automate this process. The argument to
--interdiff specifies the tip of the previous attempt against which to
generate the interdiff. For example:

    git format-patch --cover-letter --interdiff=v1 -3 v2

The previous attempt and the patch series being formatted must share a
common base.

Signed-off-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Documentation/git-format-patch.txt
Makefile
builtin/log.c
interdiff.c [new file with mode: 0644]
interdiff.h [new file with mode: 0644]
revision.h
t/t4014-format-patch.sh