+static const char *find_author_by_nickname(const char *name)
+{
+ struct rev_info revs;
+ struct commit *commit;
+ struct strbuf buf = STRBUF_INIT;
+ const char *av[20];
+ int ac = 0;
+
+ init_revisions(&revs, NULL);
+ strbuf_addf(&buf, "--author=%s", name);
+ av[++ac] = "--all";
+ av[++ac] = "-i";
+ av[++ac] = buf.buf;
+ av[++ac] = NULL;
+ setup_revisions(ac, av, &revs, NULL);
+ prepare_revision_walk(&revs);
+ commit = get_revision(&revs);
+ if (commit) {
+ strbuf_release(&buf);
+ format_commit_message(commit, "%an <%ae>", &buf, DATE_NORMAL);
+ return strbuf_detach(&buf, NULL);
+ }
+ die("No existing author found with '%s'", name);
+}
+