Teach "git diff -p" Python funcname patterns
[gitweb.git] / sha1_name.c
index 7df01af78805686572e32d5ade1460fc925a9a71..4fb77f8863ec075de38b84171d3ef039a00cee4c 100644 (file)
@@ -192,26 +192,25 @@ static int get_short_sha1(const char *name, int len, unsigned char *sha1,
 
 const char *find_unique_abbrev(const unsigned char *sha1, int len)
 {
-       int status, is_null;
+       int status, exists;
        static char hex[41];
 
-       is_null = is_null_sha1(sha1);
+       exists = has_sha1_file(sha1);
        memcpy(hex, sha1_to_hex(sha1), 40);
        if (len == 40 || !len)
                return hex;
        while (len < 40) {
                unsigned char sha1_ret[20];
                status = get_short_sha1(hex, len, sha1_ret, 1);
-               if (!status ||
-                   (is_null && status != SHORT_NAME_AMBIGUOUS)) {
+               if (exists
+                   ? !status
+                   : status == SHORT_NAME_NOT_FOUND) {
                        hex[len] = 0;
                        return hex;
                }
-               if (status != SHORT_NAME_AMBIGUOUS)
-                       return NULL;
                len++;
        }
-       return NULL;
+       return hex;
 }
 
 static int ambiguous_path(const char *path, int len)
@@ -239,23 +238,13 @@ 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;
 
@@ -277,14 +266,14 @@ 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];
                const char *ref, *it;
 
                strcpy(path, mkpath(*p, len, str));
-               ref = resolve_ref(path, hash, 0, NULL);
+               ref = resolve_ref(path, hash, 1, NULL);
                if (!ref)
                        continue;
                if (!stat(git_path("logs/%s", path), &st) &&
@@ -362,15 +351,18 @@ static int get_sha1_basic(const char *str, int len, unsigned char *sha1)
                }
                if (0 <= nth)
                        at_time = 0;
-               else
-                       at_time = approxidate(str + at + 2);
+               else {
+                       char *tmp = xstrndup(str + at + 2, reflog_len);
+                       at_time = approxidate(tmp);
+                       free(tmp);
+               }
                if (read_ref_at(real_ref, at_time, nth, sha1, NULL,
                                &co_time, &co_tz, &co_cnt)) {
                        if (at_time)
                                fprintf(stderr,
                                        "warning: Log for '%.*s' only goes "
                                        "back to %s.\n", len, str,
-                                       show_rfc2822_date(co_time, co_tz));
+                                       show_date(co_time, co_tz, DATE_RFC2822));
                        else
                                fprintf(stderr,
                                        "warning: Log for '%.*s' only has "
@@ -418,21 +410,56 @@ static int get_nth_ancestor(const char *name, int len,
                            unsigned char *result, int generation)
 {
        unsigned char sha1[20];
-       int ret = get_sha1_1(name, len, sha1);
+       struct commit *commit;
+       int ret;
+
+       ret = get_sha1_1(name, len, sha1);
        if (ret)
                return ret;
+       commit = lookup_commit_reference(sha1);
+       if (!commit)
+               return -1;
 
        while (generation--) {
-               struct commit *commit = lookup_commit_reference(sha1);
-
-               if (!commit || parse_commit(commit) || !commit->parents)
+               if (parse_commit(commit) || !commit->parents)
                        return -1;
-               hashcpy(sha1, commit->parents->item->object.sha1);
+               commit = commit->parents->item;
        }
-       hashcpy(result, sha1);
+       hashcpy(result, commit->object.sha1);
        return 0;
 }
 
+struct object *peel_to_type(const char *name, int namelen,
+                           struct object *o, enum object_type expected_type)
+{
+       if (name && !namelen)
+               namelen = strlen(name);
+       if (!o) {
+               unsigned char sha1[20];
+               if (get_sha1_1(name, namelen, sha1))
+                       return NULL;
+               o = parse_object(sha1);
+       }
+       while (1) {
+               if (!o || (!o->parsed && !parse_object(o->sha1)))
+                       return NULL;
+               if (o->type == expected_type)
+                       return o;
+               if (o->type == OBJ_TAG)
+                       o = ((struct tag*) o)->tagged;
+               else if (o->type == OBJ_COMMIT)
+                       o = &(((struct commit *) o)->tree->object);
+               else {
+                       if (name)
+                               error("%.*s: expected %s type, but the object "
+                                     "dereferences to %s type",
+                                     namelen, name, typename(expected_type),
+                                     typename(o->type));
+                       return NULL;
+               }
+       }
+}
+
 static int peel_onion(const char *name, int len, unsigned char *sha1)
 {
        unsigned char outer[20];
@@ -484,29 +511,17 @@ static int peel_onion(const char *name, int len, unsigned char *sha1)
                hashcpy(sha1, o->sha1);
        }
        else {
-               /* At this point, the syntax look correct, so
+               /*
+                * At this point, the syntax look correct, so
                 * if we do not get the needed object, we should
                 * barf.
                 */
-
-               while (1) {
-                       if (!o || (!o->parsed && !parse_object(o->sha1)))
-                               return -1;
-                       if (o->type == expected_type) {
-                               hashcpy(sha1, o->sha1);
-                               return 0;
-                       }
-                       if (o->type == OBJ_TAG)
-                               o = ((struct tag*) o)->tagged;
-                       else if (o->type == OBJ_COMMIT)
-                               o = &(((struct commit *) o)->tree->object);
-                       else
-                               return error("%.*s: expected %s type, but the object dereferences to %s type",
-                                            len, name, typename(expected_type),
-                                            typename(o->type));
-                       if (!o->parsed)
-                               parse_object(o->sha1);
+               o = peel_to_type(name, len, o, expected_type);
+               if (o) {
+                       hashcpy(sha1, o->sha1);
+                       return 0;
                }
+               return -1;
        }
        return 0;
 }
@@ -536,9 +551,8 @@ static int get_sha1_1(const char *name, int len, unsigned char *sha1)
        int ret, has_suffix;
        const char *cp;
 
-       /* "name~3" is "name^^^",
-        * "name~" and "name~0" are name -- not "name^0"!
-        * "name^" is not "name^0"; it is "name^1".
+       /*
+        * "name~3" is "name^^^", "name~" is "name~1", and "name^" is "name^1".
         */
        has_suffix = 0;
        for (cp = name + len - 1; name <= cp; cp--) {
@@ -556,11 +570,10 @@ static int get_sha1_1(const char *name, int len, unsigned char *sha1)
                cp++;
                while (cp < name + len)
                        num = num * 10 + *cp++ - '0';
-               if (has_suffix == '^') {
-                       if (!num && len1 == len - 1)
-                               num = 1;
+               if (!num && len1 == len - 1)
+                       num = 1;
+               if (has_suffix == '^')
                        return get_parent(name, len1, sha1, num);
-               }
                /* else if (has_suffix == '~') -- goes without saying */
                return get_nth_ancestor(name, len1, sha1, num);
        }
@@ -588,8 +601,11 @@ 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);
@@ -610,24 +626,35 @@ static int get_sha1_oneline(const char *prefix, unsigned char *sha1)
 {
        struct commit_list *list = NULL, *backup = NULL, *l;
        int retval = -1;
+       char *temp_commit_buffer = NULL;
 
        if (prefix[0] == '!') {
                if (prefix[1] != '!')
                        die ("Invalid search pattern: %s", prefix);
                prefix++;
        }
-       if (!save_commit_buffer)
-               return error("Could not expand oneline-name.");
        for_each_ref(handle_one_ref, &list);
        for (l = list; l; l = l->next)
                commit_list_insert(l->item, &backup);
        while (list) {
                char *p;
                struct commit *commit;
+               enum object_type type;
+               unsigned long size;
 
                commit = pop_most_recent_commit(&list, ONELINE_SEEN);
-               parse_object(commit->object.sha1);
-               if (!commit->buffer || !(p = strstr(commit->buffer, "\n\n")))
+               if (!parse_object(commit->object.sha1))
+                       continue;
+               free(temp_commit_buffer);
+               if (commit->buffer)
+                       p = commit->buffer;
+               else {
+                       p = read_sha1_file(commit->object.sha1, &type, &size);
+                       if (!p)
+                               continue;
+                       temp_commit_buffer = p;
+               }
+               if (!(p = strstr(p, "\n\n")))
                        continue;
                if (!prefixcmp(p + 2, prefix)) {
                        hashcpy(sha1, commit->object.sha1);
@@ -635,6 +662,7 @@ static int get_sha1_oneline(const char *prefix, unsigned char *sha1)
                        break;
                }
        }
+       free(temp_commit_buffer);
        free_commit_list(list);
        for (l = backup; l; l = l->next)
                clear_commit_marks(l->item, ONELINE_SEEN);
@@ -682,8 +710,6 @@ int get_sha1_with_mode(const char *name, unsigned char *sha1, unsigned *mode)
                namelen = namelen - (cp - name);
                if (!active_cache)
                        read_cache();
-               if (active_nr < 0)
-                       return -1;
                pos = cache_name_pos(cp, namelen);
                if (pos < 0)
                        pos = -pos - 1;
@@ -694,7 +720,7 @@ 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++;