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shortlog: parse trailer idents

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Trailers don't necessarily contain name/email identity values, so
shortlog has so far treated them as opaque strings. However, since many
trailers do contain identities, it's useful to treat them as such when
they can be parsed. That lets "-e" work as usual, as well as mailmap.

When they can't be parsed, we'll continue with the old behavior of
treating them as a single string (there's no new test for that here,
since the existing tests cover a trailer like this).

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Jeff King 2020-09-27 04:40:11 -04:00 committed by Junio C Hamano
parent 87abb96222
commit 56d5dde752
3 changed files with 30 additions and 3 deletions
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7
Documentation/git-shortlog.txt
View File

@ -64,9 +64,10 @@ Likewise, commits with multiple trailers (e.g., multiple signoffs) may
be counted more than once (but only once per unique trailer value in
that commit).
+
The contents of each trailer value are taken literally and completely.
No mailmap is applied, and the `-e` option has no effect (if the trailer
contains a username and email, they are both always shown).
Shortlog will attempt to parse each trailer value as a `name <email>`
identity. If successful, the mailmap is applied and the email is omitted
unless the `--email` option is specified. If the value cannot be parsed
as an identity, it will be taken literally and completely.
-c::
--committer::

6
builtin/shortlog.c
View File

@ -228,6 +228,7 @@ static void insert_records_from_trailers(struct shortlog *log,
struct trailer_iterator iter;
const char *commit_buffer, *body;
struct strset dups = STRSET_INIT;
struct strbuf ident = STRBUF_INIT;
/*
* Using format_commit_message("%B") would be simpler here, but
@ -245,12 +246,17 @@ static void insert_records_from_trailers(struct shortlog *log,
if (strcasecmp(iter.key.buf, log->trailer))
continue;
strbuf_reset(&ident);
if (!parse_ident(log, &ident, value))
value = ident.buf;
if (strset_check_and_add(&dups, value))
continue;
insert_one_record(log, value, oneline);
}
trailer_iterator_release(&iter);
strbuf_release(&ident);
strset_clear(&dups);
unuse_commit_buffer(commit, commit_buffer);
}

20
t/t4201-shortlog.sh
View File

@ -230,10 +230,30 @@ test_expect_success 'shortlog --group=trailer:signed-off-by' '
2 C O Mitter <committer@example.com>
1 SOB One <sob@example.com>
EOF
git shortlog -nse --group=trailer:signed-off-by HEAD >actual &&
test_cmp expect actual
'
test_expect_success 'trailer idents are split' '
cat >expect <<-\EOF &&
2 C O Mitter
1 SOB One
EOF
git shortlog -ns --group=trailer:signed-off-by HEAD >actual &&
test_cmp expect actual
'
test_expect_success 'trailer idents are mailmapped' '
cat >expect <<-\EOF &&
2 C O Mitter
1 Another Name
EOF
echo "Another Name <sob@example.com>" >mail.map &&
git -c mailmap.file=mail.map shortlog -ns \
--group=trailer:signed-off-by HEAD >actual &&
test_cmp expect actual
'
test_expect_success 'shortlog de-duplicates trailers in a single commit' '
git commit --allow-empty -F - <<-\EOF &&
subject one