We do not like "HEAD" as a new branch name
[git.git] / fsck-objects.c
index 0c5c430..90e638e 100644 (file)
@@ -20,6 +20,35 @@ static int check_strict = 0;
 static int keep_cache_objects = 0; 
 static unsigned char head_sha1[20];
 
+
+static void objreport(struct object *obj, const char *severity,
+                      const char *err, va_list params)
+{
+       fprintf(stderr, "%s in %s %s: ",
+               severity, obj->type, sha1_to_hex(obj->sha1));
+       vfprintf(stderr, err, params);
+       fputs("\n", stderr);
+}
+
+static int objerror(struct object *obj, const char *err, ...)
+{
+       va_list params;
+       va_start(params, err);
+       objreport(obj, "error", err, params);
+       va_end(params);
+       return -1;
+}
+
+static int objwarning(struct object *obj, const char *err, ...)
+{
+       va_list params;
+       va_start(params, err);
+       objreport(obj, "warning", err, params);
+       va_end(params);
+       return -1;
+}
+
+
 static void check_connectivity(void)
 {
        int i;
@@ -27,7 +56,6 @@ static void check_connectivity(void)
        /* Look up all the requirements, warn about missing objects.. */
        for (i = 0; i < nr_objs; i++) {
                struct object *obj = objs[i];
-               struct object_list *refs;
 
                if (!obj->parsed) {
                        if (!standalone && has_sha1_file(obj->sha1))
@@ -38,14 +66,19 @@ static void check_connectivity(void)
                        continue;
                }
 
-               for (refs = obj->refs; refs; refs = refs->next) {
-                       if (refs->item->parsed ||
-                           (!standalone && has_sha1_file(refs->item->sha1)))
-                               continue;
-                       printf("broken link from %7s %s\n",
-                              obj->type, sha1_to_hex(obj->sha1));
-                       printf("              to %7s %s\n",
-                              refs->item->type, sha1_to_hex(refs->item->sha1));
+               if (obj->refs) {
+                       const struct object_refs *refs = obj->refs;
+                       unsigned j;
+                       for (j = 0; j < refs->count; j++) {
+                               struct object *ref = refs->ref[j];
+                               if (ref->parsed ||
+                                   (!standalone && has_sha1_file(ref->sha1)))
+                                       continue;
+                               printf("broken link from %7s %s\n",
+                                      obj->type, sha1_to_hex(obj->sha1));
+                               printf("              to %7s %s\n",
+                                      ref->type, sha1_to_hex(ref->sha1));
+                       }
                }
 
                if (show_unreachable && !(obj->flags & REACHABLE)) {
@@ -155,38 +188,33 @@ static int fsck_tree(struct tree *item)
                        default:
                                break;
                        }
+                       free(last->name);
+                       free(last);
                }
 
                last = entry;
        }
+       if (last) {
+               free(last->name);
+               free(last);
+       }
+       item->entries = NULL;
 
        retval = 0;
        if (has_full_path) {
-               fprintf(stderr, "warning: git-fsck-objects: tree %s "
-                       "has full pathnames in it\n", 
-                       sha1_to_hex(item->object.sha1));
+               objwarning(&item->object, "contains full pathnames");
        }
        if (has_zero_pad) {
-               fprintf(stderr, "warning: git-fsck-objects: tree %s "
-                       "has zero-padded file modes in it\n",
-                       sha1_to_hex(item->object.sha1));
+               objwarning(&item->object, "contains zero-padded file modes");
        }
        if (has_bad_modes) {
-               fprintf(stderr, "warning: git-fsck-objects: tree %s "
-                       "has bad file modes in it\n",
-                       sha1_to_hex(item->object.sha1));
+               objwarning(&item->object, "contains bad file modes");
        }
        if (has_dup_entries) {
-               fprintf(stderr, "error: git-fsck-objects: tree %s "
-                       "has duplicate file entries\n",
-                       sha1_to_hex(item->object.sha1));
-               retval = -1;
+               retval = objerror(&item->object, "contains duplicate file entries");
        }
        if (not_properly_sorted) {
-               fprintf(stderr, "error: git-fsck-objects: tree %s "
-                       "is not properly sorted\n",
-                       sha1_to_hex(item->object.sha1));
-               retval = -1;
+               retval = objerror(&item->object, "not properly sorted");
        }
        return retval;
 }
@@ -194,24 +222,24 @@ static int fsck_tree(struct tree *item)
 static int fsck_commit(struct commit *commit)
 {
        char *buffer = commit->buffer;
-       unsigned char sha1[20];
+       unsigned char tree_sha1[20], sha1[20];
 
        if (memcmp(buffer, "tree ", 5))
-               return -1;
-       if (get_sha1_hex(buffer+5, sha1) || buffer[45] != '\n')
-               return -1;
+               return objerror(&commit->object, "invalid format - expected 'tree' line");
+       if (get_sha1_hex(buffer+5, tree_sha1) || buffer[45] != '\n')
+               return objerror(&commit->object, "invalid 'tree' line format - bad sha1");
        buffer += 46;
        while (!memcmp(buffer, "parent ", 7)) {
                if (get_sha1_hex(buffer+7, sha1) || buffer[47] != '\n')
-                       return -1;
+                       return objerror(&commit->object, "invalid 'parent' line format - bad sha1");
                buffer += 48;
        }
        if (memcmp(buffer, "author ", 7))
-               return -1;
+               return objerror(&commit->object, "invalid format - expected 'author' line");
        free(commit->buffer);
        commit->buffer = NULL;
        if (!commit->tree)
-               return -1;
+               return objerror(&commit->object, "could not load commit's tree %s", tree_sha1);
        if (!commit->parents && show_root)
                printf("root %s\n", sha1_to_hex(commit->object.sha1));
        if (!commit->date)
@@ -225,8 +253,7 @@ static int fsck_tag(struct tag *tag)
        struct object *tagged = tag->tagged;
 
        if (!tagged) {
-               printf("bad object in tag %s\n", sha1_to_hex(tag->object.sha1));
-               return -1;
+               return objerror(&tag->object, "could not load tagged object");
        }
        if (!show_tags)
                return 0;
@@ -240,7 +267,7 @@ static int fsck_sha1(unsigned char *sha1)
 {
        struct object *obj = parse_object(sha1);
        if (!obj)
-               return -1;
+               return error("%s: object not found", sha1_to_hex(sha1));
        if (obj->type == blob_type)
                return 0;
        if (obj->type == tree_type)
@@ -249,7 +276,8 @@ static int fsck_sha1(unsigned char *sha1)
                return fsck_commit((struct commit *) obj);
        if (obj->type == tag_type)
                return fsck_tag((struct tag *) obj);
-       return -1;
+       /* By now, parse_object() would've returned NULL instead. */
+       return objerror(obj, "unknown type '%s' (internal fsck error)", obj->type);
 }
 
 /*
@@ -285,8 +313,7 @@ static void fsck_sha1_list(void)
                unsigned char *sha1 = entry->sha1;
 
                sha1_list.entry[i] = NULL;
-               if (fsck_sha1(sha1) < 0)
-                       fprintf(stderr, "bad sha1 entry '%s'\n", sha1_to_hex(sha1));
+               fsck_sha1(sha1);
                free(entry);
        }
        sha1_list.nr = 0;
@@ -313,9 +340,8 @@ static int fsck_dir(int i, char *path)
        DIR *dir = opendir(path);
        struct dirent *de;
 
-       if (!dir) {
-               return error("missing sha1 directory '%s'", path);
-       }
+       if (!dir)
+               return 0;
 
        while ((de = readdir(dir)) != NULL) {
                char name[100];
@@ -386,28 +412,17 @@ static void fsck_object_dir(const char *path)
 
 static int fsck_head_link(void)
 {
-       int fd, count;
-       char hex[40];
        unsigned char sha1[20];
-       static char path[PATH_MAX], link[PATH_MAX];
-       const char *git_dir;
-
-       git_dir = getenv(GIT_DIR_ENVIRONMENT);
-       if (!git_dir) git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;
-
-       snprintf(path, sizeof(path), "%s/HEAD", git_dir);
-       if (readlink(path, link, sizeof(link)) < 0)
-               return error("HEAD is not a symlink");
-       if (strncmp("refs/heads/", link, 11))
-               return error("HEAD points to something strange (%s)", link);
-       fd = open(path, O_RDONLY);
-       if (fd < 0)
-               return error("HEAD: %s", strerror(errno));
-       count = read(fd, hex, sizeof(hex));
-       close(fd);
-       if (count < 0)
-               return error("HEAD: %s", strerror(errno));
-       if (count < 40 || get_sha1_hex(hex, sha1))
+       const char *git_HEAD = strdup(git_path("HEAD"));
+       const char *git_refs_heads_master = resolve_ref(git_HEAD, sha1, 1);
+       int pfxlen = strlen(git_HEAD) - 4; /* strip .../.git/ part */
+
+       if (!git_refs_heads_master)
+               return error("HEAD is not a symbolic ref");
+       if (strncmp(git_refs_heads_master + pfxlen, "refs/heads/", 11))
+               return error("HEAD points to something strange (%s)",
+                            git_refs_heads_master + pfxlen);
+       if (!memcmp(null_sha1, sha1, 20))
                return error("HEAD: not a valid git pointer");
        return 0;
 }
@@ -416,6 +431,8 @@ int main(int argc, char **argv)
 {
        int i, heads;
 
+       setup_git_directory();
+
        for (i = 1; i < argc; i++) {
                const char *arg = argv[i];
 
@@ -479,9 +496,7 @@ int main(int argc, char **argv)
                        for (i = 0; i < num; i++) {
                                unsigned char sha1[20];
                                nth_packed_object_sha1(p, i, sha1);
-                               if (fsck_sha1(sha1) < 0)
-                                       fprintf(stderr, "bad sha1 entry '%s'\n", sha1_to_hex(sha1));
-
+                               fsck_sha1(sha1);
                        }
                }
        }
@@ -505,7 +520,7 @@ int main(int argc, char **argv)
                        heads++;
                        continue;
                }
-               error("expected sha1, got %s", arg);
+               error("invalid parameter: expected sha1, got '%s'", arg);
        }
 
        /*