In addition to generating a shortlog based on committer, author, or the
identity in one or more specified trailers, it can be useful to generate
a shortlog based on an arbitrary commit format.
This can be used, for example, to generate a distribution of commit
activity over time, like so:
$ git shortlog --group='%cd' --date='format:%Y-%m' -s v2.37.0..
117 2022-06
274 2022-07
324 2022-08
263 2022-09
7 2022-10
Arbitrary commit formats can be used. In fact, `git shortlog`'s default
behavior (to count by commit authors) can be emulated as follows:
$ git shortlog --group='%aN <%aE>' ...
and future patches will make the default behavior (as well as
`--committer`, and `--group=trailer:<trailer>`) special cases of the
more flexible `--group` option.
Note also that the SHORTLOG_GROUP_FORMAT enum value is used only to
designate that `--group:<format>` is in use when in stdin mode to
declare that the combination is invalid.
Signed-off-by: Taylor Blau <me@xxxxxxxxxxxx>
---
Documentation/git-shortlog.txt | 5 ++++-
builtin/shortlog.c | 41 +++++++++++++++++++++++++++++++++-
shortlog.h | 2 ++
t/t4201-shortlog.sh | 32 ++++++++++++++++++++++++++
4 files changed, 78 insertions(+), 2 deletions(-)
diff --git a/Documentation/git-shortlog.txt b/Documentation/git-shortlog.txt
index 9ed9d6a9e7..7d0277d033 100644
--- a/Documentation/git-shortlog.txt
+++ b/Documentation/git-shortlog.txt
@@ -50,7 +50,7 @@ OPTIONS
--date=<format>::
Show dates formatted according to the given date string. (See
the `--date` option in the "Commit Formatting" section of
- linkgit:git-log[1]).
+ linkgit:git-log[1]). Useful with `--group=format:<format>`.
--group=<type>::
Group commits based on `<type>`. If no `--group` option is
@@ -64,6 +64,9 @@ OPTIONS
example, if your project uses `Reviewed-by` trailers, you might want
to see who has been reviewing with
`git shortlog -ns --group=trailer:reviewed-by`.
+ - `format:<format>`, any string accepted by the `--format` option of
+ 'git log'. (See the "PRETTY FORMATS" section of
+ linkgit:git-log[1].)
+
Note that commits that do not include the trailer will not be counted.
Likewise, commits with multiple trailers (e.g., multiple signoffs) may
diff --git a/builtin/shortlog.c b/builtin/shortlog.c
index d0645769d7..a52288acab 100644
--- a/builtin/shortlog.c
+++ b/builtin/shortlog.c
@@ -133,6 +133,8 @@ static void read_from_stdin(struct shortlog *log)
break;
case SHORTLOG_GROUP_TRAILER:
die(_("using %s with stdin is not supported"), "--group=trailer");
+ case SHORTLOG_GROUP_FORMAT:
+ die(_("using %s with stdin is not supported"), "--group=format");
default:
BUG("unhandled shortlog group");
}
@@ -203,6 +205,32 @@ static void insert_records_from_trailers(struct shortlog *log,
unuse_commit_buffer(commit, commit_buffer);
}
+static int shortlog_needs_dedup(const struct shortlog *log)
+{
+ return log->format.nr > 1 || log->trailers.nr;
+}
+
+static void insert_records_from_format(struct shortlog *log,
+ struct strset *dups,
+ struct commit *commit,
+ struct pretty_print_context *ctx,
+ const char *oneline)
+{
+ struct strbuf buf = STRBUF_INIT;
+ struct string_list_item *item;
+
+ for_each_string_list_item(item, &log->format) {
+ strbuf_reset(&buf);
+
+ format_commit_message(commit, item->string, &buf, ctx);
+
+ if (!shortlog_needs_dedup(log) || strset_add(dups, buf.buf))
+ insert_one_record(log, buf.buf, oneline);
+ }
+
+ strbuf_release(&buf);
+}
+
void shortlog_add_commit(struct shortlog *log, struct commit *commit)
{
struct strbuf ident = STRBUF_INIT;
@@ -244,6 +272,7 @@ void shortlog_add_commit(struct shortlog *log, struct commit *commit)
insert_one_record(log, ident.buf, oneline_str);
}
insert_records_from_trailers(log, &dups, commit, &ctx, oneline_str);
+ insert_records_from_format(log, &dups, commit, &ctx, oneline_str);
strset_clear(&dups);
strbuf_release(&ident);
@@ -315,6 +344,7 @@ static int parse_group_option(const struct option *opt, const char *arg, int uns
if (unset) {
log->groups = 0;
string_list_clear(&log->trailers, 0);
+ string_list_clear(&log->format, 0);
} else if (!strcasecmp(arg, "author"))
log->groups |= SHORTLOG_GROUP_AUTHOR;
else if (!strcasecmp(arg, "committer"))
@@ -322,8 +352,15 @@ static int parse_group_option(const struct option *opt, const char *arg, int uns
else if (skip_prefix(arg, "trailer:", &field)) {
log->groups |= SHORTLOG_GROUP_TRAILER;
string_list_append(&log->trailers, field);
- } else
+ } else if (skip_prefix(arg, "format:", &field)) {
+ log->groups |= SHORTLOG_GROUP_FORMAT;
+ string_list_append(&log->format, field);
+ } else if (strchr(arg, '%')) {
+ log->groups |= SHORTLOG_GROUP_FORMAT;
+ string_list_append(&log->format, arg);
+ } else {
return error(_("unknown group type: %s"), arg);
+ }
return 0;
}
@@ -341,6 +378,7 @@ void shortlog_init(struct shortlog *log)
log->in2 = DEFAULT_INDENT2;
log->trailers.strdup_strings = 1;
log->trailers.cmp = strcasecmp;
+ log->format.strdup_strings = 1;
}
int cmd_shortlog(int argc, const char **argv, const char *prefix)
@@ -481,4 +519,5 @@ void shortlog_output(struct shortlog *log)
log->list.strdup_strings = 1;
string_list_clear(&log->list, 1);
clear_mailmap(&log->mailmap);
+ string_list_clear(&log->format, 0);
}
diff --git a/shortlog.h b/shortlog.h
index dc388dd459..4850a8c30f 100644
--- a/shortlog.h
+++ b/shortlog.h
@@ -22,8 +22,10 @@ struct shortlog {
SHORTLOG_GROUP_AUTHOR = (1 << 0),
SHORTLOG_GROUP_COMMITTER = (1 << 1),
SHORTLOG_GROUP_TRAILER = (1 << 2),
+ SHORTLOG_GROUP_FORMAT = (1 << 3),
} groups;
struct string_list trailers;
+ struct string_list format;
int email;
struct string_list mailmap;
diff --git a/t/t4201-shortlog.sh b/t/t4201-shortlog.sh
index 7547da539d..8e4effebdb 100755
--- a/t/t4201-shortlog.sh
+++ b/t/t4201-shortlog.sh
@@ -244,6 +244,26 @@ test_expect_success 'shortlog --group=trailer:signed-off-by' '
test_cmp expect actual
'
+test_expect_success 'shortlog --group=format' '
+ git shortlog -s --date="format:%Y" --group="format:%cN (%cd)" \
+ HEAD >actual &&
+ cat >expect <<-\EOF &&
+ 4 C O Mitter (2005)
+ 1 Sin Nombre (2005)
+ EOF
+ test_cmp expect actual
+'
+
+test_expect_success 'shortlog --group=<format> DWIM' '
+ git shortlog -s --date="format:%Y" --group="%cN (%cd)" HEAD >actual &&
+ test_cmp expect actual
+'
+
+test_expect_success 'shortlog bogus --group' '
+ test_must_fail git shortlog --group=bogus HEAD 2>err &&
+ grep "unknown group type" err
+'
+
test_expect_success 'trailer idents are split' '
cat >expect <<-\EOF &&
2 C O Mitter
@@ -326,6 +346,18 @@ test_expect_success 'shortlog can match multiple groups' '
test_cmp expect actual
'
+test_expect_success 'shortlog can match multiple format groups' '
+ GIT_COMMITTER_NAME="$GIT_AUTHOR_NAME" \
+ git commit --allow-empty -m "identical names" &&
+ test_tick &&
+ cat >expect <<-\EOF &&
+ 2 A U Thor
+ 1 C O Mitter
+ EOF
+ git shortlog -ns --group="%cn" --group="%an" -2 HEAD >actual &&
+ test_cmp expect actual
+'
+
test_expect_success 'set up option selection tests' '
git commit --allow-empty -F - <<-\EOF
subject
--
2.38.0.16.g393fd4c6db
