log --reflog: use dwim_log

Since "git log origin/master" uses dwim_log() to match
"refs/remotes/origin/master", it makes sense to do that for
"git log --reflog", too.

Signed-off-by: Johannes Schindelin <Johannes.Schindelin@gmx.de>
Signed-off-by: Junio C Hamano <junkio@cox.net>

cache.h

@@ -302,6 +302,7 @@ extern char *sha1_to_hex(const unsigned char *sha1);	/* static buffer result! */
 extern int read_ref(const char *filename, unsigned char *sha1);
 extern const char *resolve_ref(const char *path, unsigned char *sha1, int, int *);
 extern int dwim_ref(const char *str, int len, unsigned char *sha1, char **ref);
+extern int dwim_log(const char *str, int len, unsigned char *sha1, char **ref);
 
 extern int create_symref(const char *ref, const char *refs_heads_master, const char *logmsg);
 extern int validate_headref(const char *ref);

reflog-walk.c

@@ -174,6 +174,19 @@ void add_reflog_for_walk(struct reflog_walk_info *info,
 			branch = xstrdup(head);
 		}
 		reflogs = read_complete_reflog(branch);
+		if (!reflogs || reflogs->nr == 0) {
+			unsigned char sha1[20];
+			char *b;
+			if (dwim_log(branch, strlen(branch), sha1, &b) == 1) {
+				if (reflogs) {
+					free(reflogs->ref);
+					free(reflogs);
+				}
+				free(branch);
+				branch = b;
+				reflogs = read_complete_reflog(branch);
+			}
+		}
 		if (!reflogs || reflogs->nr == 0)
 			die("No reflogs found for '%s'", branch);
 		path_list_insert(branch, &info->complete_reflogs)->util

sha1_name.c

@@ -267,7 +267,7 @@ int dwim_ref(const char *str, int len, unsigned char *sha1, char **ref)
 	return refs_found;
 }
 
-static int dwim_log(const char *str, int len, unsigned char *sha1, char **log)
+int dwim_log(const char *str, int len, unsigned char *sha1, char **log)
 {
 	const char **p;
 	int logs_found = 0;