static int fetch(struct walker *walker, unsigned char *sha1)
{
struct object *obj = lookup_object(sha1);
if (obj && obj->type == OBJ_BLOB) {
int skip_object = walker->sparse_checkout_list_count > 0 ? 1 : 0;
for (int i = 0; i < walker->sparse_checkout_list_count; i++) {
if (memcmp(walker->sparse_checkout_list + sizeof(unsigned char[20]) * i, sha1, sizeof(unsigned char[20])) == 0) {
skip_object = 0;
break;
}
}
if (skip_object) {
/* xxd -i .git/objects/6c/a8147f8b21da66ea9e90c1e88d70f1e8aa5f9d which represents: 'This is a dummy file' */
static unsigned char git_dummy_file[] = {
0x78, 0x01, 0x4b, 0xca, 0xc9, 0x4f, 0x52, 0x30, 0x32, 0x64, 0x08, 0xc9,
0xc8, 0x2c, 0x56, 0x00, 0xa2, 0x44, 0x85, 0x94, 0xd2, 0xdc, 0xdc, 0x4a,
0x85, 0xb4, 0xcc, 0x9c, 0x54, 0x2e, 0x00, 0x89, 0x4a, 0x09, 0x4e
};
static unsigned int git_dummy_file_len = 35;
safe_create_leading_directories_const(sha1_file_name(sha1));
FILE *f = fopen(sha1_file_name(sha1), "wb");
if (f == NULL) {
fprintf(stderr, _("Unable to create file for intercepting"));
exit(-1);
}
else if (f != NULL) {
fwrite(git_dummy_file, git_dummy_file_len, 1, f);
fclose(f);
}
return 0;
}
}
struct walker_data *data = walker->data;
struct alt_base *altbase = data->alt;
if (!fetch_object(walker, altbase, sha1))
return 0;
while (altbase) {
if (!http_fetch_pack(walker, altbase, sha1))
return 0;
fetch_alternates(walker, data->alt->base);
altbase = altbase->next;
}
return error("Unable to find %s under %s", sha1_to_hex(sha1),
data->alt->base);
}
static void prefetch(struct walker *walker, unsigned char *sha1)
{
struct object_request *newreq;
struct object_request *tail;
struct walker_data *data = walker->data;
char *filename = sha1_file_name(sha1);
newreq = xmalloc(sizeof(*newreq));
newreq->walker = walker;
hashcpy(newreq->sha1, sha1);
newreq->repo = data->alt;
newreq->url = NULL;
newreq->local = -1;
newreq->state = WAITING;
snprintf(newreq->filename, sizeof(newreq->filename), "%s", filename);
snprintf(newreq->tmpfile, sizeof(newreq->tmpfile),
"%s.temp", filename);
newreq->slot = NULL;
newreq->next = NULL;
if (object_queue_head == NULL) {
object_queue_head = newreq;
} else {
tail = object_queue_head;
while (tail->next != NULL) {
tail = tail->next;
}
tail->next = newreq;
}
#ifdef USE_CURL_MULTI
fill_active_slots();
step_active_slots();
#endif
}
static int check_valid_sha1(unsigned char *sha1)
{
char *filename = sha1_file_name(sha1);
int ret;
/* If we were anal, we'd check that the sha1 of the contents actually matches */
ret = access(filename, R_OK);
if (ret)
perror(filename);
return ret;
}
static int fetch_file(const unsigned char *sha1)
{
static int object_name_start = -1;
static char filename[PATH_MAX];
char *hex = sha1_to_hex(sha1);
char *dest_filename = sha1_file_name(sha1);
if (object_name_start < 0) {
strcpy(filename, path); /* e.g. git.git */
strcat(filename, "/objects/");
object_name_start = strlen(filename);
}
filename[object_name_start+0] = hex[0];
filename[object_name_start+1] = hex[1];
filename[object_name_start+2] = '/';
strcpy(filename + object_name_start + 3, hex + 2);
return copy_file(filename, dest_filename, hex, 0);
}
static int fetch_object(struct walker *walker, struct alt_base *repo, unsigned char *sha1)
{
char *hex = sha1_to_hex(sha1);
int ret = 0;
struct object_request *obj_req = object_queue_head;
struct http_object_request *req;
while (obj_req != NULL && hashcmp(obj_req->sha1, sha1))
obj_req = obj_req->next;
if (obj_req == NULL)
return error("Couldn't find request for %s in the queue", hex);
if (has_sha1_file(obj_req->sha1)) {
if (obj_req->req != NULL)
abort_http_object_request(obj_req->req);
abort_object_request(obj_req);
return 0;
}
#ifdef USE_CURL_MULTI
while (obj_req->state == WAITING)
step_active_slots();
#else
start_object_request(walker, obj_req);
#endif
/*
* obj_req->req might change when fetching alternates in the callback
* process_object_response; therefore, the "shortcut" variable, req,
* is used only after we're done with slots.
*/
while (obj_req->state == ACTIVE)
run_active_slot(obj_req->req->slot);
req = obj_req->req;
if (req->localfile != -1) {
close(req->localfile);
req->localfile = -1;
}
if (obj_req->state == ABORTED) {
ret = error("Request for %s aborted", hex);
} else if (req->curl_result != CURLE_OK &&
req->http_code != 416) {
if (missing_target(req))
ret = -1; /* Be silent, it is probably in a pack. */
else
ret = error("%s (curl_result = %d, http_code = %ld, sha1 = %s)",
req->errorstr, req->curl_result,
req->http_code, hex);
} else if (req->zret != Z_STREAM_END) {
walker->corrupt_object_found++;
ret = error("File %s (%s) corrupt", hex, req->url);
} else if (hashcmp(obj_req->sha1, req->real_sha1)) {
ret = error("File %s has bad hash", hex);
} else if (req->rename < 0) {
ret = error("unable to write sha1 filename %s",
sha1_file_name(req->sha1));
}
release_http_object_request(req);
release_object_request(obj_req);
return ret;
}