1 files changed, 68 insertions, 1 deletions

diff --git a/pretty.c b/pretty.c
index c5f5ecc40d..b1ecd039ce 100644
--- a/pretty.c
+++ b/pretty.c
@@ -12,6 +12,7 @@
 #include "reflog-walk.h"
 #include "gpg-interface.h"
 #include "trailer.h"
+#include "run-command.h"
 
 static char *user_format;
 static struct cmt_fmt_map {
@@ -678,7 +679,7 @@ static int mailmap_name(const char **email, size_t *email_len,
 {
 	static struct string_list *mail_map;
 	if (!mail_map) {
-		mail_map = xcalloc(1, sizeof(*mail_map));
+		CALLOC_ARRAY(mail_map, 1);
 		read_mailmap(mail_map);
 	}
 	return mail_map->nr && map_user(mail_map, email, email_len, name, name_len);
@@ -744,6 +745,9 @@ static size_t format_person_part(struct strbuf *sb, char part,
 	case 'I':	/* date, ISO 8601 strict */
 		strbuf_addstr(sb, show_ident_date(&s, DATE_MODE(ISO8601_STRICT)));
 		return placeholder_len;
+	case 'h':	/* date, human */
+		strbuf_addstr(sb, show_ident_date(&s, DATE_MODE(HUMAN)));
+		return placeholder_len;
 	case 's':
 		strbuf_addstr(sb, show_ident_date(&s, DATE_MODE(SHORT)));
 		return placeholder_len;
@@ -1206,6 +1210,34 @@ int format_set_trailers_options(struct process_trailer_options *opts,
 	return 0;
 }
 
+static size_t parse_describe_args(const char *start, struct strvec *args)
+{
+	const char *options[] = { "match", "exclude" };
+	const char *arg = start;
+
+	for (;;) {
+		const char *matched = NULL;
+		const char *argval;
+		size_t arglen = 0;
+		int i;
+
+		for (i = 0; i < ARRAY_SIZE(options); i++) {
+			if (match_placeholder_arg_value(arg, options[i], &arg,
+							&argval, &arglen)) {
+				matched = options[i];
+				break;
+			}
+		}
+		if (!matched)
+			break;
+
+		if (!arglen)
+			return 0;
+		strvec_pushf(args, "--%s=%.*s", matched, (int)arglen, argval);
+	}
+	return arg - start;
+}
+
 static size_t format_commit_one(struct strbuf *sb, /* in UTF-8 */
 				const char *placeholder,
 				void *context)
@@ -1271,6 +1303,41 @@ static size_t format_commit_one(struct strbuf *sb, /* in UTF-8 */
 		return parse_padding_placeholder(placeholder, c);
 	}
 
+	if (skip_prefix(placeholder, "(describe", &arg)) {
+		struct child_process cmd = CHILD_PROCESS_INIT;
+		struct strbuf out = STRBUF_INIT;
+		struct strbuf err = STRBUF_INIT;
+		struct pretty_print_describe_status *describe_status;
+
+		describe_status = c->pretty_ctx->describe_status;
+		if (describe_status) {
+			if (!describe_status->max_invocations)
+				return 0;
+			describe_status->max_invocations--;
+		}
+
+		cmd.git_cmd = 1;
+		strvec_push(&cmd.args, "describe");
+
+		if (*arg == ':') {
+			arg++;
+			arg += parse_describe_args(arg, &cmd.args);
+		}
+
+		if (*arg != ')') {
+			child_process_clear(&cmd);
+			return 0;
+		}
+
+		strvec_push(&cmd.args, oid_to_hex(&commit->object.oid));
+		pipe_command(&cmd, NULL, 0, &out, 0, &err, 0);
+		strbuf_rtrim(&out);
+		strbuf_addbuf(sb, &out);
+		strbuf_release(&out);
+		strbuf_release(&err);
+		return arg - placeholder + 1;
+	}
+
 	/* these depend on the commit */
 	if (!commit->object.parsed)
 		parse_object(the_repository, &commit->object.oid);