When gathering the author and oneline subject for each
commit, we hand-parse the commit headers to find the
"author" line, and then continue past to the blank line at
the end of the header.
We can replace this tricky hand-parsing by simply asking the
pretty-printer for the relevant items. This also decouples
the author and oneline parsing, opening up some new
optimizations in further commits.
One reason to avoid the pretty-printer is that it might be
less efficient than hand-parsing. However, I measured no
slowdown at all running "git shortlog -ns HEAD" on
linux.git.
As a bonus, we also fix a memory leak in the (uncommon) case
that the author field is blank.
Signed-off-by: Jeff King <peff@xxxxxxxx>
---
builtin/shortlog.c | 62 +++++++++++++++++++++++-------------------------------
1 file changed, 26 insertions(+), 36 deletions(-)
diff --git a/builtin/shortlog.c b/builtin/shortlog.c
index 6c0a72e..1261ec4 100644
--- a/builtin/shortlog.c
+++ b/builtin/shortlog.c
@@ -113,45 +113,35 @@ static void read_from_stdin(struct shortlog *log)
void shortlog_add_commit(struct shortlog *log, struct commit *commit)
{
- const char *author = NULL, *buffer;
- struct strbuf buf = STRBUF_INIT;
- struct strbuf ufbuf = STRBUF_INIT;
-
- pp_commit_easy(CMIT_FMT_RAW, commit, &buf);
- buffer = buf.buf;
- while (*buffer && *buffer != '\n') {
- const char *eol = strchr(buffer, '\n');
-
- if (eol == NULL)
- eol = buffer + strlen(buffer);
- else
- eol++;
-
- if (starts_with(buffer, "author "))
- author = buffer + 7;
- buffer = eol;
- }
- if (!author) {
+ struct strbuf author = STRBUF_INIT;
+ struct strbuf oneline = STRBUF_INIT;
+ struct pretty_print_context ctx = {0};
+
+ ctx.fmt = CMIT_FMT_USERFORMAT;
+ ctx.abbrev = log->abbrev;
+ ctx.subject = "";
+ ctx.after_subject = "";
+ ctx.date_mode.type = DATE_NORMAL;
+ ctx.output_encoding = get_log_output_encoding();
+
+ format_commit_message(commit, "%an <%ae>", &author, &ctx);
+ /* we can detect a total failure only by seeing " <>" in the output */
+ if (author.len <= 3) {
warning(_("Missing author: %s"),
oid_to_hex(&commit->object.oid));
- return;
- }
- if (log->user_format) {
- struct pretty_print_context ctx = {0};
- ctx.fmt = CMIT_FMT_USERFORMAT;
- ctx.abbrev = log->abbrev;
- ctx.subject = "";
- ctx.after_subject = "";
- ctx.date_mode.type = DATE_NORMAL;
- ctx.output_encoding = get_log_output_encoding();
- pretty_print_commit(&ctx, commit, &ufbuf);
- buffer = ufbuf.buf;
- } else if (*buffer) {
- buffer++;
+ goto out;
}
- insert_one_record(log, author, !*buffer ? "<none>" : buffer);
- strbuf_release(&ufbuf);
- strbuf_release(&buf);
+
+ if (log->user_format)
+ pretty_print_commit(&ctx, commit, &oneline);
+ else
+ format_commit_message(commit, "%s", &oneline, &ctx);
+
+ insert_one_record(log, author.buf, oneline.len ? oneline.buf : "<none>");
+
+out:
+ strbuf_release(&author);
+ strbuf_release(&oneline);
}
static void get_from_rev(struct rev_info *rev, struct shortlog *log)
--
2.7.0.248.g5eafd77
--
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