correct usage help string for git-hash-object

diff --git a/refs.c b/refs.c
index 9b495eb16ef03b14791aa44e1098cd918859f0cc..39a3b23804d2da715c564459bf320be23d41c1bf 100644 (file)
--- a/refs.c
+++ b/refs.c
@@ -159,6 +159,8 @@ static struct cached_refs {
 } cached_refs;
 static struct ref_list *current_ref;
 
+static struct ref_list *extra_refs;
+
 static void free_ref_list(struct ref_list *list)
 {
        struct ref_list *next;
@@ -215,6 +217,17 @@ static void read_packed_refs(FILE *f, struct cached_refs *cached_refs)
        cached_refs->packed = sort_ref_list(list);
 }
 
+void add_extra_ref(const char *name, const unsigned char *sha1, int flag)
+{
+       extra_refs = add_ref(name, sha1, flag, extra_refs, NULL);
+}
+
+void clear_extra_refs(void)
+{
+       free_ref_list(extra_refs);
+       extra_refs = NULL;
+}
+
 static struct ref_list *get_packed_refs(void)
 {
        if (!cached_refs.did_packed) {
@@ -547,6 +560,11 @@ static int do_for_each_ref(const char *base, each_ref_fn fn, int trim,
        struct ref_list *packed = get_packed_refs();
        struct ref_list *loose = get_loose_refs();
 
+       struct ref_list *extra;
+
+       for (extra = extra_refs; extra; extra = extra->next)
+               retval = do_one_ref(base, fn, trim, cb_data, extra);
+
        while (packed && loose) {
                struct ref_list *entry;
                int cmp = strcmp(packed->name, loose->name);
@@ -907,7 +925,7 @@ int delete_ref(const char *refname, const unsigned char *sha1)
                i = strlen(lock->lk->filename) - 5; /* .lock */
                lock->lk->filename[i] = 0;
                err = unlink(lock->lk->filename);
-               if (err) {
+               if (err && errno != ENOENT) {
                        ret = 1;
                        error("unlink(%s) failed: %s",
                              lock->lk->filename, strerror(errno));
@@ -1394,6 +1412,10 @@ int read_ref_at(const char *ref, unsigned long at_time, int cnt, unsigned char *
        tz = strtoul(tz_c, NULL, 10);
        if (get_sha1_hex(logdata, sha1))
                die("Log %s is corrupt.", logfile);
+       if (is_null_sha1(sha1)) {
+               if (get_sha1_hex(logdata + 41, sha1))
+                       die("Log %s is corrupt.", logfile);
+       }
        if (msg)
                *msg = ref_msg(logdata, logend);
        munmap(log_mapped, mapsz);