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#include <sys/types.h>
#include <dirent.h>
#include "cache.h"
#include "commit.h"
#include "tree.h"
#include "blob.h"
#include "tag.h"
#define REACHABLE 0x0001
static int show_root = 0;
static int show_tags = 0;
static int show_unreachable = 0;
static unsigned char head_sha1[20];
static void check_connectivity(void)
{
int i;
/* 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) {
printf("missing %s %s\n", obj->type, sha1_to_hex(obj->sha1));
continue;
}
for (refs = obj->refs; refs; refs = refs->next) {
if (refs->item->parsed)
continue;
printf("broken link from %7s %s\n",
obj->type, sha1_to_hex(obj->sha1));
printf(" to %7s %s\n",
obj->type, sha1_to_hex(refs->item->sha1));
}
/* Don't bother with tag reachability. */
if (obj->type == tag_type)
continue;
if (show_unreachable && !(obj->flags & REACHABLE)) {
printf("unreachable %s %s\n", obj->type, sha1_to_hex(obj->sha1));
continue;
}
if (!obj->used) {
printf("dangling %s %s\n", obj->type,
sha1_to_hex(obj->sha1));
}
}
}
static int fsck_tree(struct tree *item)
{
if (item->has_full_path) {
fprintf(stderr, "warning: fsck-cache: tree %s "
"has full pathnames in it\n",
sha1_to_hex(item->object.sha1));
}
return 0;
}
static int fsck_commit(struct commit *commit)
{
if (!commit->tree)
return -1;
if (!commit->parents && show_root)
printf("root %s\n", sha1_to_hex(commit->object.sha1));
if (!commit->date)
printf("bad commit date in %s\n",
sha1_to_hex(commit->object.sha1));
return 0;
}
static int fsck_tag(struct tag *tag)
{
if (!show_tags)
return 0;
printf("tagged %s %s",
tag->tagged->type,
sha1_to_hex(tag->tagged->sha1));
printf(" (%s) in %s\n",
tag->tag, sha1_to_hex(tag->object.sha1));
return 0;
}
static int fsck_name(char *hex)
{
unsigned char sha1[20];
if (!get_sha1_hex(hex, sha1)) {
struct object *obj = parse_object(sha1);
if (!obj)
return -1;
if (obj->type == blob_type)
return 0;
if (obj->type == tree_type)
return fsck_tree((struct tree *) obj);
if (obj->type == commit_type)
return fsck_commit((struct commit *) obj);
if (obj->type == tag_type)
return fsck_tag((struct tag *) obj);
}
return -1;
}
static int fsck_dir(int i, char *path)
{
DIR *dir = opendir(path);
struct dirent *de;
if (!dir) {
return error("missing sha1 directory '%s'", path);
}
while ((de = readdir(dir)) != NULL) {
char name[100];
int len = strlen(de->d_name);
switch (len) {
case 2:
if (de->d_name[1] != '.')
break;
case 1:
if (de->d_name[0] != '.')
break;
continue;
case 38:
sprintf(name, "%02x", i);
memcpy(name+2, de->d_name, len+1);
if (!fsck_name(name))
continue;
}
fprintf(stderr, "bad sha1 file: %s/%s\n", path, de->d_name);
}
closedir(dir);
return 0;
}
int main(int argc, char **argv)
{
int i, heads;
char *sha1_dir;
for (i = 1; i < argc; i++) {
const char *arg = argv[i];
if (!strcmp(arg, "--unreachable")) {
show_unreachable = 1;
continue;
}
if (!strcmp(arg, "--tags")) {
show_tags = 1;
continue;
}
if (!strcmp(arg, "--root")) {
show_root = 1;
continue;
}
if (*arg == '-')
usage("fsck-cache [--tags] [[--unreachable] <head-sha1>*]");
}
sha1_dir = getenv(DB_ENVIRONMENT) ? : DEFAULT_DB_ENVIRONMENT;
for (i = 0; i < 256; i++) {
static char dir[4096];
sprintf(dir, "%s/%02x", sha1_dir, i);
fsck_dir(i, dir);
}
heads = 0;
for (i = 1; i < argc; i++) {
const char *arg = argv[i];
if (*arg == '-')
continue;
if (!get_sha1(arg, head_sha1)) {
struct commit *commit = lookup_commit(head_sha1);
struct object *obj;
/* Error is printed by lookup_commit(). */
if (!commit)
continue;
obj = &commit->object;
obj->used = 1;
mark_reachable(obj, REACHABLE);
heads++;
continue;
}
error("expected sha1, got %s", arg);
}
if (!heads) {
if (show_unreachable) {
fprintf(stderr, "unable to do reachability without a head\n");
show_unreachable = 0;
}
fprintf(stderr, "expect dangling commits - potential heads - due to lack of head information\n");
}
check_connectivity();
return 0;
}
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