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#include "cache.h"
#include <sys/types.h>
#include <dirent.h>
#include "commit.h"
#include "tree.h"
#include "blob.h"
#define REACHABLE 0x0001
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];
if (show_unreachable && !(obj->flags & REACHABLE)) {
printf("unreachable %s\n", sha1_to_hex(obj->sha1));
continue;
}
if (!obj->parsed) {
printf("missing %s %s\n", obj->type,
sha1_to_hex(obj->sha1));
}
if (!obj->used) {
printf("dangling %s %s\n", obj->type,
sha1_to_hex(obj->sha1));
}
}
}
static int fsck_tree(unsigned char *sha1, void *data, unsigned long size)
{
struct tree *item = lookup_tree(sha1);
if (parse_tree(item))
return -1;
if (item->has_full_path) {
fprintf(stderr, "warning: fsck-cache: tree %s "
"has full pathnames in it\n", sha1_to_hex(sha1));
}
return 0;
}
static int fsck_commit(unsigned char *sha1, void *data, unsigned long size)
{
struct commit *commit = lookup_commit(sha1);
if (parse_commit(commit))
return -1;
if (!commit->tree)
return -1;
if (!commit->parents)
printf("root %s\n", sha1_to_hex(sha1));
return 0;
}
static int fsck_entry(unsigned char *sha1, char *tag, void *data,
unsigned long size)
{
if (!strcmp(tag, "blob")) {
lookup_blob(sha1); /* Nothing to check; but notice it. */
} else if (!strcmp(tag, "tree")) {
if (fsck_tree(sha1, data, size) < 0)
return -1;
} else if (!strcmp(tag, "commit")) {
if (fsck_commit(sha1, data, size) < 0)
return -1;
} else
return -1;
return 0;
}
static int fsck_name(char *hex)
{
unsigned char sha1[20];
if (!get_sha1_hex(hex, sha1)) {
unsigned long mapsize;
void *map = map_sha1_file(sha1, &mapsize);
if (map) {
char type[100];
unsigned long size;
void *buffer = NULL;
if (!check_sha1_signature(sha1, map, mapsize))
buffer = unpack_sha1_file(map, mapsize, type,
&size);
munmap(map, mapsize);
if (buffer && !fsck_entry(sha1, type, buffer, size))
return 0;
}
}
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;
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++) {
if (!strcmp(argv[i], "--unreachable")) {
show_unreachable = 1;
continue;
}
if (!get_sha1_hex(argv[i], head_sha1)) {
struct object *obj = &lookup_commit(head_sha1)->object;
obj->used = 1;
mark_reachable(obj, REACHABLE);
heads++;
continue;
}
error("fsck-cache [[--unreachable] <head-sha1>*]");
}
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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