Re: Allow "git shortlog" to group by committer information

On Fri, Dec 16, 2016 at 08:39:40AM -0500, Jeff King wrote:

I'm OK with the approach your patch takes, but I think there were some
unresolved issues:

  - are we OK taking the short "-c" for this, or do we want
    "--group-by=committer" or something like it?

  - no tests; you can steal the general form from my [1]

  - no documentation (can also be stolen from [1], though the syntax is
    quite different)

Being moved by the holiday spirit, I wrote a patch to address the latter
two. ;)

It obviously would need updating if we switch away from "-c", but I
think I am OK with the short "-c" (even if we add a more exotic grouping
option later, this can remain as a short synonym).

-- >8 --
Subject: [PATCH] shortlog: test and document --committer option

This puts the final touches on the feature added by
fbfda15fb8 (shortlog: group by committer information,
2016-10-11).

Signed-off-by: Jeff King <redacted>
---
 Documentation/git-shortlog.txt |  4 ++++
 t/t4201-shortlog.sh            | 13 +++++++++++++
 2 files changed, 17 insertions(+)

diff --git a/Documentation/git-shortlog.txt b/Documentation/git-shortlog.txt
index 31af7f2736..ee6c5476c1 100644
--- a/Documentation/git-shortlog.txt
+++ b/Documentation/git-shortlog.txt

@@ -47,6 +47,10 @@ OPTIONS
 
 	Each pretty-printed commit will be rewrapped before it is shown.
 
+-c::
+--committer::
+	Collect and show committer identities instead of authors.
+
 -w[<width>[,<indent1>[,<indent2>]]]::
 	Linewrap the output by wrapping each line at `width`.  The first
 	line of each entry is indented by `indent1` spaces, and the second

diff --git a/t/t4201-shortlog.sh b/t/t4201-shortlog.sh
index ae08b57712..6c7c637481 100755
--- a/t/t4201-shortlog.sh
+++ b/t/t4201-shortlog.sh

@@ -190,4 +190,17 @@ test_expect_success 'shortlog with --output=<file>' '
 	test_line_count = 3 shortlog
 '
 
+test_expect_success 'shortlog --committer (internal)' '
+	cat >expect <<-\EOF &&
+	     3	C O Mitter
+	EOF
+	git shortlog -nsc HEAD >actual &&
+	test_cmp expect actual
+'
+
+test_expect_success 'shortlog --committer (external)' '
+	git log --format=full | git shortlog -nsc >actual &&
+	test_cmp expect actual
+'
+
 test_done

-- 
2.11.0.348.g960a0b554