Avoid accessing non-tag refs in git-describe unless --all is requested

diff --git a/sha1_name.c b/sha1_name.c
index bd8fc05c4b9727ad4d14b20127012b53a9ef90ee..c2805e736b3086a0e33271a4b5c73cea7d2c55cd 100644 (file)
--- a/sha1_name.c
+++ b/sha1_name.c
@@ -239,23 +239,13 @@ static int ambiguous_path(const char *path, int len)
        return slash;
 }
 
-static const char *ref_fmt[] = {
-       "%.*s",
-       "refs/%.*s",
-       "refs/tags/%.*s",
-       "refs/heads/%.*s",
-       "refs/remotes/%.*s",
-       "refs/remotes/%.*s/HEAD",
-       NULL
-};
-
 int dwim_ref(const char *str, int len, unsigned char *sha1, char **ref)
 {
        const char **p, *r;
        int refs_found = 0;
 
        *ref = NULL;
-       for (p = ref_fmt; *p; p++) {
+       for (p = ref_rev_parse_rules; *p; p++) {
                unsigned char sha1_from_ref[20];
                unsigned char *this_result;
 
@@ -277,7 +267,7 @@ int dwim_log(const char *str, int len, unsigned char *sha1, char **log)
        int logs_found = 0;
 
        *log = NULL;
-       for (p = ref_fmt; *p; p++) {
+       for (p = ref_rev_parse_rules; *p; p++) {
                struct stat st;
                unsigned char hash[20];
                char path[PATH_MAX];
@@ -504,8 +494,11 @@ static int peel_onion(const char *name, int len, unsigned char *sha1)
                                return error("%.*s: expected %s type, but the object dereferences to %s type",
                                             len, name, typename(expected_type),
                                             typename(o->type));
+                       if (!o)
+                               return -1;
                        if (!o->parsed)
-                               parse_object(o->sha1);
+                               if (!parse_object(o->sha1))
+                                       return -1;
                }
        }
        return 0;
@@ -588,8 +581,11 @@ static int handle_one_ref(const char *path,
        struct object *object = parse_object(sha1);
        if (!object)
                return 0;
-       if (object->type == OBJ_TAG)
+       if (object->type == OBJ_TAG) {
                object = deref_tag(object, path, strlen(path));
+               if (!object)
+                       return 0;
+       }
        if (object->type != OBJ_COMMIT)
                return 0;
        insert_by_date((struct commit *)object, list);
@@ -627,7 +623,8 @@ static int get_sha1_oneline(const char *prefix, unsigned char *sha1)
                unsigned long size;
 
                commit = pop_most_recent_commit(&list, ONELINE_SEEN);
-               parse_object(commit->object.sha1);
+               if (!parse_object(commit->object.sha1))
+                       continue;
                if (temp_commit_buffer)
                        free(temp_commit_buffer);
                if (commit->buffer)
@@ -705,7 +702,7 @@ int get_sha1_with_mode(const char *name, unsigned char *sha1, unsigned *mode)
                                break;
                        if (ce_stage(ce) == stage) {
                                hashcpy(sha1, ce->sha1);
-                               *mode = ntohl(ce->ce_mode);
+                               *mode = ce->ce_mode;
                                return 0;
                        }
                        pos++;