#include "tree.h"
#include "blob.h"
#include "tag.h"
+#include "delta.h"
#define REACHABLE 0x0001
static int show_root = 0;
static int show_tags = 0;
static int show_unreachable = 0;
+static int show_max_delta_depth = 0;
static int keep_cache_objects = 0;
static unsigned char head_sha1[20];
+static void expand_deltas(void)
+{
+ int i, max_depth = 0;
+
+ /*
+ * To be as efficient as possible we look for delta heads and
+ * recursively process them going backward, and parsing
+ * resulting objects along the way. This allows for processing
+ * each delta objects only once regardless of the delta depth.
+ */
+ for (i = 0; i < nr_objs; i++) {
+ struct object *obj = objs[i];
+ if (obj->parsed && !obj->delta && obj->attached_deltas) {
+ int depth = 0;
+ char type[10];
+ unsigned long size;
+ void *buf = read_sha1_file(obj->sha1, type, &size);
+ if (!buf)
+ continue;
+ depth = process_deltas(buf, size, obj->type,
+ obj->attached_deltas);
+ if (max_depth < depth)
+ max_depth = depth;
+ }
+ }
+ if (show_max_delta_depth)
+ printf("maximum delta depth = %d\n", max_depth);
+}
+
static void check_connectivity(void)
{
int i;
struct object_list *refs;
if (!obj->parsed) {
- printf("missing %s %s\n", obj->type, sha1_to_hex(obj->sha1));
+ if (obj->delta)
+ printf("unresolved delta %s\n",
+ sha1_to_hex(obj->sha1));
+ else
+ printf("missing %s %s\n",
+ obj->type, sha1_to_hex(obj->sha1));
continue;
}
continue;
if (show_unreachable && !(obj->flags & REACHABLE)) {
- printf("unreachable %s %s\n", obj->type, sha1_to_hex(obj->sha1));
+ if (obj->attached_deltas)
+ printf("foreign delta reference %s\n",
+ sha1_to_hex(obj->sha1));
+ else
+ printf("unreachable %s %s\n",
+ obj->type, sha1_to_hex(obj->sha1));
continue;
}
}
if (has_full_path) {
- fprintf(stderr, "warning: fsck-cache: tree %s "
+ fprintf(stderr, "warning: git-fsck-cache: tree %s "
"has full pathnames in it\n",
sha1_to_hex(item->object.sha1));
}
static int fsck_commit(struct commit *commit)
{
+ free(commit->buffer);
+ commit->buffer = NULL;
if (!commit->tree)
return -1;
if (!commit->parents && show_root)
return fsck_commit((struct commit *) obj);
if (obj->type == tag_type)
return fsck_tag((struct tag *) obj);
+ if (!obj->type && obj->delta)
+ return 0;
return -1;
}
return 0;
}
+static int read_sha1_reference(const char *path)
+{
+ char hexname[60];
+ unsigned char sha1[20];
+ int fd = open(path, O_RDONLY), len;
+ struct object *obj;
+
+ if (fd < 0)
+ return -1;
+
+ len = read(fd, hexname, sizeof(hexname));
+ close(fd);
+ if (len < 40)
+ return -1;
+
+ if (get_sha1_hex(hexname, sha1) < 0)
+ return -1;
+
+ obj = lookup_object(sha1);
+ if (!obj)
+ return error("%s: invalid sha1 pointer %.40s", path, hexname);
+
+ obj->used = 1;
+ mark_reachable(obj, REACHABLE);
+ return 0;
+}
+
+static int find_file_objects(const char *base, const char *name)
+{
+ int baselen = strlen(base);
+ int namelen = strlen(name);
+ char *path = xmalloc(baselen + namelen + 2);
+ struct stat st;
+
+ memcpy(path, base, baselen);
+ path[baselen] = '/';
+ memcpy(path + baselen + 1, name, namelen+1);
+ if (stat(path, &st) < 0)
+ return 0;
+
+ /*
+ * Recurse into directories
+ */
+ if (S_ISDIR(st.st_mode)) {
+ int count = 0;
+ DIR *dir = opendir(path);
+ if (dir) {
+ struct dirent *de;
+ while ((de = readdir(dir)) != NULL) {
+ if (de->d_name[0] == '.')
+ continue;
+ count += find_file_objects(path, de->d_name);
+ }
+ closedir(dir);
+ }
+ return count;
+ }
+ if (S_ISREG(st.st_mode))
+ return read_sha1_reference(path) == 0;
+ return 0;
+}
+
+static void get_default_heads(void)
+{
+ char *git_dir = gitenv(GIT_DIR_ENVIRONMENT) ? : DEFAULT_GIT_DIR_ENVIRONMENT;
+ int count = find_file_objects(git_dir, "refs");
+ if (!count)
+ die("No default references");
+}
+
int main(int argc, char **argv)
{
int i, heads;
show_root = 1;
continue;
}
+ if (!strcmp(arg, "--delta-depth")) {
+ show_max_delta_depth = 1;
+ continue;
+ }
if (!strcmp(arg, "--cache")) {
keep_cache_objects = 1;
continue;
}
if (*arg == '-')
- usage("fsck-cache [--tags] [[--unreachable] [--cache] <head-sha1>*]");
+ usage("git-fsck-cache [--tags] [[--unreachable] [--cache] <head-sha1>*]");
}
sha1_dir = get_object_directory();
}
fsck_sha1_list();
+ expand_deltas();
+
heads = 0;
for (i = 1; i < argc; i++) {
const char *arg = argv[i];
error("expected sha1, got %s", arg);
}
+ /*
+ * If we've not been given any explicit head information, do the
+ * default ones from .git/refs. We also consider the index file
+ * in this case (ie this implies --cache).
+ */
+ if (!heads) {
+ get_default_heads();
+ keep_cache_objects = 1;
+ }
+
if (keep_cache_objects) {
int i;
read_cache();
}
}
- if (!heads && !keep_cache_objects) {
- if (show_unreachable) {
- fprintf(stderr, "unable to do reachability without a head nor --cache\n");
- show_unreachable = 0;
- }
- if (!heads)
- fprintf(stderr, "expect dangling commits - potential heads - due to lack of head information\n");
- }
-
check_connectivity();
return 0;
}