static void read_packed_refs(FILE *f, struct cached_refs *cached_refs)
{
struct ref_list *list = NULL;
struct ref_list *last = NULL;
char refline[PATH_MAX];
int flag = REF_ISPACKED;
while (fgets(refline, sizeof(refline), f)) {
unsigned char sha1[20];
const char *name;
static const char header[] = "# pack-refs with:";
if (!strncmp(refline, header, sizeof(header)-1)) {
const char *traits = refline + sizeof(header) - 1;
if (strstr(traits, " peeled "))
flag |= REF_KNOWS_PEELED;
/* perhaps other traits later as well */
continue;
}
name = parse_ref_line(refline, sha1);
if (name) {
list = add_ref(name, sha1, flag, list, &last);
continue;
}
if (last &&
refline[0] == '^' &&
strlen(refline) == 42 &&
refline[41] == '\n' &&
!get_sha1_hex(refline + 1, sha1))
hashcpy(last->peeled, sha1);
}
cached_refs->packed = sort_ref_list(list);
}
static struct ref_list *get_ref_dir(const char *base, struct ref_list *list)
{
DIR *dir = opendir(git_path("%s", base));
if (dir) {
struct dirent *de;
int baselen = strlen(base);
char *ref = xmalloc(baselen + 257);
memcpy(ref, base, baselen);
if (baselen && base[baselen-1] != '/')
ref[baselen++] = '/';
while ((de = readdir(dir)) != NULL) {
unsigned char sha1[20];
struct stat st;
int flag;
int namelen;
if (de->d_name[0] == '.')
continue;
namelen = strlen(de->d_name);
if (namelen > 255)
continue;
if (has_extension(de->d_name, ".lock"))
continue;
memcpy(ref + baselen, de->d_name, namelen+1);
if (stat(git_path("%s", ref), &st) < 0)
continue;
if (S_ISDIR(st.st_mode)) {
list = get_ref_dir(ref, list);
continue;
}
if (!resolve_ref(ref, sha1, 1, &flag)) {
hashclr(sha1);
flag |= REF_BROKEN;
}
list = add_ref(ref, sha1, flag, list, NULL);
}
free(ref);
closedir(dir);
}
return sort_ref_list(list);
}
static struct ref *do_fetch_pack(struct fetch_pack_args *args,
int fd[2],
const struct ref *orig_ref,
struct ref **sought, int nr_sought,
struct shallow_info *si,
char **pack_lockfile)
{
struct ref *ref = copy_ref_list(orig_ref);
unsigned char sha1[20];
const char *agent_feature;
int agent_len;
sort_ref_list(&ref, ref_compare_name);
qsort(sought, nr_sought, sizeof(*sought), cmp_ref_by_name);
if (is_repository_shallow() && !server_supports("shallow"))
die("Server does not support shallow clients");
if (server_supports("multi_ack_detailed")) {
if (args->verbose)
fprintf(stderr, "Server supports multi_ack_detailed\n");
multi_ack = 2;
if (server_supports("no-done")) {
if (args->verbose)
fprintf(stderr, "Server supports no-done\n");
if (args->stateless_rpc)
no_done = 1;
}
}
else if (server_supports("multi_ack")) {
if (args->verbose)
fprintf(stderr, "Server supports multi_ack\n");
multi_ack = 1;
}
if (server_supports("side-band-64k")) {
if (args->verbose)
fprintf(stderr, "Server supports side-band-64k\n");
use_sideband = 2;
}
else if (server_supports("side-band")) {
if (args->verbose)
fprintf(stderr, "Server supports side-band\n");
use_sideband = 1;
}
if (server_supports("allow-tip-sha1-in-want")) {
if (args->verbose)
fprintf(stderr, "Server supports allow-tip-sha1-in-want\n");
allow_tip_sha1_in_want = 1;
}
if (!server_supports("thin-pack"))
args->use_thin_pack = 0;
if (!server_supports("no-progress"))
args->no_progress = 0;
if (!server_supports("include-tag"))
args->include_tag = 0;
if (server_supports("ofs-delta")) {
if (args->verbose)
fprintf(stderr, "Server supports ofs-delta\n");
} else
prefer_ofs_delta = 0;
if ((agent_feature = server_feature_value("agent", &agent_len))) {
agent_supported = 1;
if (args->verbose && agent_len)
fprintf(stderr, "Server version is %.*s\n",
agent_len, agent_feature);
}
if (everything_local(args, &ref, sought, nr_sought)) {
packet_flush(fd[1]);
goto all_done;
}
if (find_common(args, fd, sha1, ref) < 0)
if (!args->keep_pack)
/* When cloning, it is not unusual to have
* no common commit.
*/
warning("no common commits");
if (args->stateless_rpc)
packet_flush(fd[1]);
if (args->depth > 0)
setup_alternate_shallow(&shallow_lock, &alternate_shallow_file,
NULL);
else if (si->nr_ours || si->nr_theirs)
alternate_shallow_file = setup_temporary_shallow(si->shallow);
else
alternate_shallow_file = NULL;
if (get_pack(args, fd, pack_lockfile))
die("git fetch-pack: fetch failed.");
all_done:
return ref;
}
static struct ref *do_fetch_pack(struct fetch_pack_args *args,
int fd[2],
const struct ref *orig_ref,
struct ref **sought, int nr_sought,
struct shallow_info *si,
char **pack_lockfile)
{
struct ref *ref = copy_ref_list(orig_ref);
struct object_id oid;
const char *agent_feature;
int agent_len;
struct fetch_negotiator negotiator;
fetch_negotiator_init(&negotiator, negotiation_algorithm);
sort_ref_list(&ref, ref_compare_name);
QSORT(sought, nr_sought, cmp_ref_by_name);
if ((args->depth > 0 || is_repository_shallow(the_repository)) && !server_supports("shallow"))
die(_("Server does not support shallow clients"));
if (args->depth > 0 || args->deepen_since || args->deepen_not)
args->deepen = 1;
if (server_supports("multi_ack_detailed")) {
print_verbose(args, _("Server supports multi_ack_detailed"));
multi_ack = 2;
if (server_supports("no-done")) {
print_verbose(args, _("Server supports no-done"));
if (args->stateless_rpc)
no_done = 1;
}
}
else if (server_supports("multi_ack")) {
print_verbose(args, _("Server supports multi_ack"));
multi_ack = 1;
}
if (server_supports("side-band-64k")) {
print_verbose(args, _("Server supports side-band-64k"));
use_sideband = 2;
}
else if (server_supports("side-band")) {
print_verbose(args, _("Server supports side-band"));
use_sideband = 1;
}
if (server_supports("allow-tip-sha1-in-want")) {
print_verbose(args, _("Server supports allow-tip-sha1-in-want"));
allow_unadvertised_object_request |= ALLOW_TIP_SHA1;
}
if (server_supports("allow-reachable-sha1-in-want")) {
print_verbose(args, _("Server supports allow-reachable-sha1-in-want"));
allow_unadvertised_object_request |= ALLOW_REACHABLE_SHA1;
}
if (!server_supports("thin-pack"))
args->use_thin_pack = 0;
if (!server_supports("no-progress"))
args->no_progress = 0;
if (!server_supports("include-tag"))
args->include_tag = 0;
if (server_supports("ofs-delta"))
print_verbose(args, _("Server supports ofs-delta"));
else
prefer_ofs_delta = 0;
if (server_supports("filter")) {
server_supports_filtering = 1;
print_verbose(args, _("Server supports filter"));
} else if (args->filter_options.choice) {
warning("filtering not recognized by server, ignoring");
}
if ((agent_feature = server_feature_value("agent", &agent_len))) {
agent_supported = 1;
if (agent_len)
print_verbose(args, _("Server version is %.*s"),
agent_len, agent_feature);
}
if (server_supports("deepen-since"))
deepen_since_ok = 1;
else if (args->deepen_since)
die(_("Server does not support --shallow-since"));
if (server_supports("deepen-not"))
deepen_not_ok = 1;
else if (args->deepen_not)
die(_("Server does not support --shallow-exclude"));
if (!server_supports("deepen-relative") && args->deepen_relative)
die(_("Server does not support --deepen"));
if (!args->no_dependents) {
mark_complete_and_common_ref(&negotiator, args, &ref);
filter_refs(args, &ref, sought, nr_sought);
if (everything_local(args, &ref)) {
packet_flush(fd[1]);
goto all_done;
}
} else {
filter_refs(args, &ref, sought, nr_sought);
}
if (find_common(&negotiator, args, fd, &oid, ref) < 0)
if (!args->keep_pack)
/* When cloning, it is not unusual to have
* no common commit.
*/
warning(_("no common commits"));
if (args->stateless_rpc)
packet_flush(fd[1]);
if (args->deepen)
setup_alternate_shallow(&shallow_lock, &alternate_shallow_file,
NULL);
else if (si->nr_ours || si->nr_theirs)
alternate_shallow_file = setup_temporary_shallow(si->shallow);
else
alternate_shallow_file = NULL;
if (get_pack(args, fd, pack_lockfile))
die(_("git fetch-pack: fetch failed."));
all_done:
negotiator.release(&negotiator);
return ref;
}
static struct ref *do_fetch_pack_v2(struct fetch_pack_args *args,
int fd[2],
const struct ref *orig_ref,
struct ref **sought, int nr_sought,
char **pack_lockfile)
{
struct ref *ref = copy_ref_list(orig_ref);
enum fetch_state state = FETCH_CHECK_LOCAL;
struct oidset common = OIDSET_INIT;
struct packet_reader reader;
int in_vain = 0;
int haves_to_send = INITIAL_FLUSH;
struct fetch_negotiator negotiator;
fetch_negotiator_init(&negotiator, negotiation_algorithm);
packet_reader_init(&reader, fd[0], NULL, 0,
PACKET_READ_CHOMP_NEWLINE);
while (state != FETCH_DONE) {
switch (state) {
case FETCH_CHECK_LOCAL:
sort_ref_list(&ref, ref_compare_name);
QSORT(sought, nr_sought, cmp_ref_by_name);
/* v2 supports these by default */
allow_unadvertised_object_request |= ALLOW_REACHABLE_SHA1;
use_sideband = 2;
if (args->depth > 0 || args->deepen_since || args->deepen_not)
args->deepen = 1;
/* Filter 'ref' by 'sought' and those that aren't local */
if (!args->no_dependents) {
mark_complete_and_common_ref(&negotiator, args, &ref);
filter_refs(args, &ref, sought, nr_sought);
if (everything_local(args, &ref))
state = FETCH_DONE;
else
state = FETCH_SEND_REQUEST;
mark_tips(&negotiator, args->negotiation_tips);
for_each_cached_alternate(&negotiator,
insert_one_alternate_object);
} else {
filter_refs(args, &ref, sought, nr_sought);
state = FETCH_SEND_REQUEST;
}
break;
case FETCH_SEND_REQUEST:
if (send_fetch_request(&negotiator, fd[1], args, ref,
&common,
&haves_to_send, &in_vain))
state = FETCH_GET_PACK;
else
state = FETCH_PROCESS_ACKS;
break;
case FETCH_PROCESS_ACKS:
/* Process ACKs/NAKs */
switch (process_acks(&negotiator, &reader, &common)) {
case 2:
state = FETCH_GET_PACK;
break;
case 1:
in_vain = 0;
/* fallthrough */
default:
state = FETCH_SEND_REQUEST;
break;
}
break;
case FETCH_GET_PACK:
/* Check for shallow-info section */
if (process_section_header(&reader, "shallow-info", 1))
receive_shallow_info(args, &reader);
if (process_section_header(&reader, "wanted-refs", 1))
receive_wanted_refs(&reader, sought, nr_sought);
/* get the pack */
process_section_header(&reader, "packfile", 0);
if (get_pack(args, fd, pack_lockfile))
die(_("git fetch-pack: fetch failed."));
state = FETCH_DONE;
break;
case FETCH_DONE:
continue;
}
}
negotiator.release(&negotiator);
oidset_clear(&common);
return ref;
}
