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fetch-pack.c
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#include "cache.h"
#include "repository.h"
#include "config.h"
#include "lockfile.h"
#include "refs.h"
#include "pkt-line.h"
#include "commit.h"
#include "tag.h"
#include "exec-cmd.h"
#include "pack.h"
#include "sideband.h"
#include "fetch-pack.h"
#include "remote.h"
#include "run-command.h"
#include "connect.h"
#include "transport.h"
#include "version.h"
#include "sha1-array.h"
#include "oidset.h"
#include "packfile.h"
#include "object-store.h"
#include "connected.h"
#include "fetch-negotiator.h"
#include "fsck.h"
static int transfer_unpack_limit = -1;
static int fetch_unpack_limit = -1;
static int unpack_limit = 100;
static int prefer_ofs_delta = 1;
static int no_done;
static int deepen_since_ok;
static int deepen_not_ok;
static int fetch_fsck_objects = -1;
static int transfer_fsck_objects = -1;
static int agent_supported;
static int server_supports_filtering;
static struct lock_file shallow_lock;
static const char *alternate_shallow_file;
static struct strbuf fsck_msg_types = STRBUF_INIT;
/* Remember to update object flag allocation in object.h */
#define COMPLETE (1U << 0)
#define ALTERNATE (1U << 1)
/*
* After sending this many "have"s if we do not get any new ACK , we
* give up traversing our history.
*/
#define MAX_IN_VAIN 256
static int multi_ack, use_sideband;
/* Allow specifying sha1 if it is a ref tip. */
#define ALLOW_TIP_SHA1 01
/* Allow request of a sha1 if it is reachable from a ref (possibly hidden ref). */
#define ALLOW_REACHABLE_SHA1 02
static unsigned int allow_unadvertised_object_request;
__attribute__((format (printf, 2, 3)))
static inline void print_verbose(const struct fetch_pack_args *args,
const char *fmt, ...)
{
va_list params;
if (!args->verbose)
return;
va_start(params, fmt);
vfprintf(stderr, fmt, params);
va_end(params);
fputc('\n', stderr);
}
struct alternate_object_cache {
struct object **items;
size_t nr, alloc;
};
static void cache_one_alternate(const struct object_id *oid,
void *vcache)
{
struct alternate_object_cache *cache = vcache;
struct object *obj = parse_object(the_repository, oid);
if (!obj || (obj->flags & ALTERNATE))
return;
obj->flags |= ALTERNATE;
ALLOC_GROW(cache->items, cache->nr + 1, cache->alloc);
cache->items[cache->nr++] = obj;
}
static void for_each_cached_alternate(struct fetch_negotiator *negotiator,
void (*cb)(struct fetch_negotiator *,
struct object *))
{
static int initialized;
static struct alternate_object_cache cache;
size_t i;
if (!initialized) {
for_each_alternate_ref(cache_one_alternate, &cache);
initialized = 1;
}
for (i = 0; i < cache.nr; i++)
cb(negotiator, cache.items[i]);
}
static int rev_list_insert_ref(struct fetch_negotiator *negotiator,
const char *refname,
const struct object_id *oid)
{
struct object *o = deref_tag(the_repository,
parse_object(the_repository, oid),
refname, 0);
if (o && o->type == OBJ_COMMIT)
negotiator->add_tip(negotiator, (struct commit *)o);
return 0;
}
static int rev_list_insert_ref_oid(const char *refname, const struct object_id *oid,
int flag, void *cb_data)
{
return rev_list_insert_ref(cb_data, refname, oid);
}
enum ack_type {
NAK = 0,
ACK,
ACK_continue,
ACK_common,
ACK_ready
};
static void consume_shallow_list(struct fetch_pack_args *args,
struct packet_reader *reader)
{
if (args->stateless_rpc && args->deepen) {
/* If we sent a depth we will get back "duplicate"
* shallow and unshallow commands every time there
* is a block of have lines exchanged.
*/
while (packet_reader_read(reader) == PACKET_READ_NORMAL) {
if (starts_with(reader->line, "shallow "))
continue;
if (starts_with(reader->line, "unshallow "))
continue;
die(_("git fetch-pack: expected shallow list"));
}
if (reader->status != PACKET_READ_FLUSH)
die(_("git fetch-pack: expected a flush packet after shallow list"));
}
}
static enum ack_type get_ack(struct packet_reader *reader,
struct object_id *result_oid)
{
int len;
const char *arg;
if (packet_reader_read(reader) != PACKET_READ_NORMAL)
die(_("git fetch-pack: expected ACK/NAK, got a flush packet"));
len = reader->pktlen;
if (!strcmp(reader->line, "NAK"))
return NAK;
if (skip_prefix(reader->line, "ACK ", &arg)) {
if (!get_oid_hex(arg, result_oid)) {
arg += 40;
len -= arg - reader->line;
if (len < 1)
return ACK;
if (strstr(arg, "continue"))
return ACK_continue;
if (strstr(arg, "common"))
return ACK_common;
if (strstr(arg, "ready"))
return ACK_ready;
return ACK;
}
}
die(_("git fetch-pack: expected ACK/NAK, got '%s'"), reader->line);
}
static void send_request(struct fetch_pack_args *args,
int fd, struct strbuf *buf)
{
if (args->stateless_rpc) {
send_sideband(fd, -1, buf->buf, buf->len, LARGE_PACKET_MAX);
packet_flush(fd);
} else {
if (write_in_full(fd, buf->buf, buf->len) < 0)
die_errno(_("unable to write to remote"));
}
}
static void insert_one_alternate_object(struct fetch_negotiator *negotiator,
struct object *obj)
{
rev_list_insert_ref(negotiator, NULL, &obj->oid);
}
#define INITIAL_FLUSH 16
#define PIPESAFE_FLUSH 32
#define LARGE_FLUSH 16384
static int next_flush(int stateless_rpc, int count)
{
if (stateless_rpc) {
if (count < LARGE_FLUSH)
count <<= 1;
else
count = count * 11 / 10;
} else {
if (count < PIPESAFE_FLUSH)
count <<= 1;
else
count += PIPESAFE_FLUSH;
}
return count;
}
static void mark_tips(struct fetch_negotiator *negotiator,
const struct oid_array *negotiation_tips)
{
int i;
if (!negotiation_tips) {
for_each_ref(rev_list_insert_ref_oid, negotiator);
return;
}
for (i = 0; i < negotiation_tips->nr; i++)
rev_list_insert_ref(negotiator, NULL,
&negotiation_tips->oid[i]);
return;
}
static int find_common(struct fetch_negotiator *negotiator,
struct fetch_pack_args *args,
int fd[2], struct object_id *result_oid,
struct ref *refs)
{
int fetching;
int count = 0, flushes = 0, flush_at = INITIAL_FLUSH, retval;
const struct object_id *oid;
unsigned in_vain = 0;
int got_continue = 0;
int got_ready = 0;
struct strbuf req_buf = STRBUF_INIT;
size_t state_len = 0;
struct packet_reader reader;
if (args->stateless_rpc && multi_ack == 1)
die(_("--stateless-rpc requires multi_ack_detailed"));
packet_reader_init(&reader, fd[0], NULL, 0,
PACKET_READ_CHOMP_NEWLINE |
PACKET_READ_DIE_ON_ERR_PACKET);
if (!args->no_dependents) {
mark_tips(negotiator, args->negotiation_tips);
for_each_cached_alternate(negotiator, insert_one_alternate_object);
}
fetching = 0;
for ( ; refs ; refs = refs->next) {
struct object_id *remote = &refs->old_oid;
const char *remote_hex;
struct object *o;
/*
* If that object is complete (i.e. it is an ancestor of a
* local ref), we tell them we have it but do not have to
* tell them about its ancestors, which they already know
* about.
*
* We use lookup_object here because we are only
* interested in the case we *know* the object is
* reachable and we have already scanned it.
*
* Do this only if args->no_dependents is false (if it is true,
* we cannot trust the object flags).
*/
if (!args->no_dependents &&
((o = lookup_object(the_repository, remote)) != NULL) &&
(o->flags & COMPLETE)) {
continue;
}
remote_hex = oid_to_hex(remote);
if (!fetching) {
struct strbuf c = STRBUF_INIT;
if (multi_ack == 2) strbuf_addstr(&c, " multi_ack_detailed");
if (multi_ack == 1) strbuf_addstr(&c, " multi_ack");
if (no_done) strbuf_addstr(&c, " no-done");
if (use_sideband == 2) strbuf_addstr(&c, " side-band-64k");
if (use_sideband == 1) strbuf_addstr(&c, " side-band");
if (args->deepen_relative) strbuf_addstr(&c, " deepen-relative");
if (args->use_thin_pack) strbuf_addstr(&c, " thin-pack");
if (args->no_progress) strbuf_addstr(&c, " no-progress");
if (args->include_tag) strbuf_addstr(&c, " include-tag");
if (prefer_ofs_delta) strbuf_addstr(&c, " ofs-delta");
if (deepen_since_ok) strbuf_addstr(&c, " deepen-since");
if (deepen_not_ok) strbuf_addstr(&c, " deepen-not");
if (agent_supported) strbuf_addf(&c, " agent=%s",
git_user_agent_sanitized());
if (args->filter_options.choice)
strbuf_addstr(&c, " filter");
packet_buf_write(&req_buf, "want %s%s\n", remote_hex, c.buf);
strbuf_release(&c);
} else
packet_buf_write(&req_buf, "want %s\n", remote_hex);
fetching++;
}
if (!fetching) {
strbuf_release(&req_buf);
packet_flush(fd[1]);
return 1;
}
if (is_repository_shallow(the_repository))
write_shallow_commits(&req_buf, 1, NULL);
if (args->depth > 0)
packet_buf_write(&req_buf, "deepen %d", args->depth);
if (args->deepen_since) {
timestamp_t max_age = approxidate(args->deepen_since);
packet_buf_write(&req_buf, "deepen-since %"PRItime, max_age);
}
if (args->deepen_not) {
int i;
for (i = 0; i < args->deepen_not->nr; i++) {
struct string_list_item *s = args->deepen_not->items + i;
packet_buf_write(&req_buf, "deepen-not %s", s->string);
}
}
if (server_supports_filtering && args->filter_options.choice) {
const char *spec =
expand_list_objects_filter_spec(&args->filter_options);
packet_buf_write(&req_buf, "filter %s", spec);
}
packet_buf_flush(&req_buf);
state_len = req_buf.len;
if (args->deepen) {
const char *arg;
struct object_id oid;
send_request(args, fd[1], &req_buf);
while (packet_reader_read(&reader) == PACKET_READ_NORMAL) {
if (skip_prefix(reader.line, "shallow ", &arg)) {
if (get_oid_hex(arg, &oid))
die(_("invalid shallow line: %s"), reader.line);
register_shallow(the_repository, &oid);
continue;
}
if (skip_prefix(reader.line, "unshallow ", &arg)) {
if (get_oid_hex(arg, &oid))
die(_("invalid unshallow line: %s"), reader.line);
if (!lookup_object(the_repository, &oid))
die(_("object not found: %s"), reader.line);
/* make sure that it is parsed as shallow */
if (!parse_object(the_repository, &oid))
die(_("error in object: %s"), reader.line);
if (unregister_shallow(&oid))
die(_("no shallow found: %s"), reader.line);
continue;
}
die(_("expected shallow/unshallow, got %s"), reader.line);
}
} else if (!args->stateless_rpc)
send_request(args, fd[1], &req_buf);
if (!args->stateless_rpc) {
/* If we aren't using the stateless-rpc interface
* we don't need to retain the headers.
*/
strbuf_setlen(&req_buf, 0);
state_len = 0;
}
flushes = 0;
retval = -1;
if (args->no_dependents)
goto done;
while ((oid = negotiator->next(negotiator))) {
packet_buf_write(&req_buf, "have %s\n", oid_to_hex(oid));
print_verbose(args, "have %s", oid_to_hex(oid));
in_vain++;
if (flush_at <= ++count) {
int ack;
packet_buf_flush(&req_buf);
send_request(args, fd[1], &req_buf);
strbuf_setlen(&req_buf, state_len);
flushes++;
flush_at = next_flush(args->stateless_rpc, count);
/*
* We keep one window "ahead" of the other side, and
* will wait for an ACK only on the next one
*/
if (!args->stateless_rpc && count == INITIAL_FLUSH)
continue;
consume_shallow_list(args, &reader);
do {
ack = get_ack(&reader, result_oid);
if (ack)
print_verbose(args, _("got %s %d %s"), "ack",
ack, oid_to_hex(result_oid));
switch (ack) {
case ACK:
flushes = 0;
multi_ack = 0;
retval = 0;
goto done;
case ACK_common:
case ACK_ready:
case ACK_continue: {
struct commit *commit =
lookup_commit(the_repository,
result_oid);
int was_common;
if (!commit)
die(_("invalid commit %s"), oid_to_hex(result_oid));
was_common = negotiator->ack(negotiator, commit);
if (args->stateless_rpc
&& ack == ACK_common
&& !was_common) {
/* We need to replay the have for this object
* on the next RPC request so the peer knows
* it is in common with us.
*/
const char *hex = oid_to_hex(result_oid);
packet_buf_write(&req_buf, "have %s\n", hex);
state_len = req_buf.len;
/*
* Reset in_vain because an ack
* for this commit has not been
* seen.
*/
in_vain = 0;
} else if (!args->stateless_rpc
|| ack != ACK_common)
in_vain = 0;
retval = 0;
got_continue = 1;
if (ack == ACK_ready)
got_ready = 1;
break;
}
}
} while (ack);
flushes--;
if (got_continue && MAX_IN_VAIN < in_vain) {
print_verbose(args, _("giving up"));
break; /* give up */
}
if (got_ready)
break;
}
}
done:
if (!got_ready || !no_done) {
packet_buf_write(&req_buf, "done\n");
send_request(args, fd[1], &req_buf);
}
print_verbose(args, _("done"));
if (retval != 0) {
multi_ack = 0;
flushes++;
}
strbuf_release(&req_buf);
if (!got_ready || !no_done)
consume_shallow_list(args, &reader);
while (flushes || multi_ack) {
int ack = get_ack(&reader, result_oid);
if (ack) {
print_verbose(args, _("got %s (%d) %s"), "ack",
ack, oid_to_hex(result_oid));
if (ack == ACK)
return 0;
multi_ack = 1;
continue;
}
flushes--;
}
/* it is no error to fetch into a completely empty repo */
return count ? retval : 0;
}
static struct commit_list *complete;
static int mark_complete(const struct object_id *oid)
{
struct object *o = parse_object(the_repository, oid);
while (o && o->type == OBJ_TAG) {
struct tag *t = (struct tag *) o;
if (!t->tagged)
break; /* broken repository */
o->flags |= COMPLETE;
o = parse_object(the_repository, &t->tagged->oid);
}
if (o && o->type == OBJ_COMMIT) {
struct commit *commit = (struct commit *)o;
if (!(commit->object.flags & COMPLETE)) {
commit->object.flags |= COMPLETE;
commit_list_insert(commit, &complete);
}
}
return 0;
}
static int mark_complete_oid(const char *refname, const struct object_id *oid,
int flag, void *cb_data)
{
return mark_complete(oid);
}
static void mark_recent_complete_commits(struct fetch_pack_args *args,
timestamp_t cutoff)
{
while (complete && cutoff <= complete->item->date) {
print_verbose(args, _("Marking %s as complete"),
oid_to_hex(&complete->item->object.oid));
pop_most_recent_commit(&complete, COMPLETE);
}
}
static void add_refs_to_oidset(struct oidset *oids, struct ref *refs)
{
for (; refs; refs = refs->next)
oidset_insert(oids, &refs->old_oid);
}
static int is_unmatched_ref(const struct ref *ref)
{
struct object_id oid;
const char *p;
return ref->match_status == REF_NOT_MATCHED &&
!parse_oid_hex(ref->name, &oid, &p) &&
*p == '\0' &&
oideq(&oid, &ref->old_oid);
}
static void filter_refs(struct fetch_pack_args *args,
struct ref **refs,
struct ref **sought, int nr_sought)
{
struct ref *newlist = NULL;
struct ref **newtail = &newlist;
struct ref *unmatched = NULL;
struct ref *ref, *next;
struct oidset tip_oids = OIDSET_INIT;
int i;
int strict = !(allow_unadvertised_object_request &
(ALLOW_TIP_SHA1 | ALLOW_REACHABLE_SHA1));
i = 0;
for (ref = *refs; ref; ref = next) {
int keep = 0;
next = ref->next;
if (starts_with(ref->name, "refs/") &&
check_refname_format(ref->name, 0)) {
/*
* trash or a peeled value; do not even add it to
* unmatched list
*/
free_one_ref(ref);
continue;
} else {
while (i < nr_sought) {
int cmp = strcmp(ref->name, sought[i]->name);
if (cmp < 0)
break; /* definitely do not have it */
else if (cmp == 0) {
keep = 1; /* definitely have it */
sought[i]->match_status = REF_MATCHED;
}
i++;
}
if (!keep && args->fetch_all &&
(!args->deepen || !starts_with(ref->name, "refs/tags/")))
keep = 1;
}
if (keep) {
*newtail = ref;
ref->next = NULL;
newtail = &ref->next;
} else {
ref->next = unmatched;
unmatched = ref;
}
}
if (strict) {
for (i = 0; i < nr_sought; i++) {
ref = sought[i];
if (!is_unmatched_ref(ref))
continue;
add_refs_to_oidset(&tip_oids, unmatched);
add_refs_to_oidset(&tip_oids, newlist);
break;
}
}
/* Append unmatched requests to the list */
for (i = 0; i < nr_sought; i++) {
ref = sought[i];
if (!is_unmatched_ref(ref))
continue;
if (!strict || oidset_contains(&tip_oids, &ref->old_oid)) {
ref->match_status = REF_MATCHED;
*newtail = copy_ref(ref);
newtail = &(*newtail)->next;
} else {
ref->match_status = REF_UNADVERTISED_NOT_ALLOWED;
}
}
oidset_clear(&tip_oids);
free_refs(unmatched);
*refs = newlist;
}
static void mark_alternate_complete(struct fetch_negotiator *unused,
struct object *obj)
{
mark_complete(&obj->oid);
}
struct loose_object_iter {
struct oidset *loose_object_set;
struct ref *refs;
};
/*
* Mark recent commits available locally and reachable from a local ref as
* COMPLETE. If args->no_dependents is false, also mark COMPLETE remote refs as
* COMMON_REF (otherwise, we are not planning to participate in negotiation, and
* thus do not need COMMON_REF marks).
*
* The cutoff time for recency is determined by this heuristic: it is the
* earliest commit time of the objects in refs that are commits and that we know
* the commit time of.
*/
static void mark_complete_and_common_ref(struct fetch_negotiator *negotiator,
struct fetch_pack_args *args,
struct ref **refs)
{
struct ref *ref;
int old_save_commit_buffer = save_commit_buffer;
timestamp_t cutoff = 0;
save_commit_buffer = 0;
for (ref = *refs; ref; ref = ref->next) {
struct object *o;
if (!has_object_file_with_flags(&ref->old_oid,
OBJECT_INFO_QUICK))
continue;
o = parse_object(the_repository, &ref->old_oid);
if (!o)
continue;
/* We already have it -- which may mean that we were
* in sync with the other side at some time after
* that (it is OK if we guess wrong here).
*/
if (o->type == OBJ_COMMIT) {
struct commit *commit = (struct commit *)o;
if (!cutoff || cutoff < commit->date)
cutoff = commit->date;
}
}
if (!args->deepen) {
for_each_ref(mark_complete_oid, NULL);
for_each_cached_alternate(NULL, mark_alternate_complete);
commit_list_sort_by_date(&complete);
if (cutoff)
mark_recent_complete_commits(args, cutoff);
}
/*
* Mark all complete remote refs as common refs.
* Don't mark them common yet; the server has to be told so first.
*/
for (ref = *refs; ref; ref = ref->next) {
struct object *o = deref_tag(the_repository,
lookup_object(the_repository,
&ref->old_oid),
NULL, 0);
if (!o || o->type != OBJ_COMMIT || !(o->flags & COMPLETE))
continue;
negotiator->known_common(negotiator,
(struct commit *)o);
}
save_commit_buffer = old_save_commit_buffer;
}
/*
* Returns 1 if every object pointed to by the given remote refs is available
* locally and reachable from a local ref, and 0 otherwise.
*/
static int everything_local(struct fetch_pack_args *args,
struct ref **refs)
{
struct ref *ref;
int retval;
for (retval = 1, ref = *refs; ref ; ref = ref->next) {
const struct object_id *remote = &ref->old_oid;
struct object *o;
o = lookup_object(the_repository, remote);
if (!o || !(o->flags & COMPLETE)) {
retval = 0;
print_verbose(args, "want %s (%s)", oid_to_hex(remote),
ref->name);
continue;
}
print_verbose(args, _("already have %s (%s)"), oid_to_hex(remote),
ref->name);
}
return retval;
}
static int sideband_demux(int in, int out, void *data)
{
int *xd = data;
int ret;
ret = recv_sideband("fetch-pack", xd[0], out);
close(out);
return ret;
}
static int get_pack(struct fetch_pack_args *args,
int xd[2], char **pack_lockfile)
{
struct async demux;
int do_keep = args->keep_pack;
const char *cmd_name;
struct pack_header header;
int pass_header = 0;
struct child_process cmd = CHILD_PROCESS_INIT;
int ret;
memset(&demux, 0, sizeof(demux));
if (use_sideband) {
/* xd[] is talking with upload-pack; subprocess reads from
* xd[0], spits out band#2 to stderr, and feeds us band#1
* through demux->out.
*/
demux.proc = sideband_demux;
demux.data = xd;
demux.out = -1;
demux.isolate_sigpipe = 1;
if (start_async(&demux))
die(_("fetch-pack: unable to fork off sideband demultiplexer"));
}
else
demux.out = xd[0];
if (!args->keep_pack && unpack_limit) {
if (read_pack_header(demux.out, &header))
die(_("protocol error: bad pack header"));
pass_header = 1;
if (ntohl(header.hdr_entries) < unpack_limit)
do_keep = 0;
else
do_keep = 1;
}
if (alternate_shallow_file) {
argv_array_push(&cmd.args, "--shallow-file");
argv_array_push(&cmd.args, alternate_shallow_file);
}
if (do_keep || args->from_promisor) {
if (pack_lockfile)
cmd.out = -1;
cmd_name = "index-pack";
argv_array_push(&cmd.args, cmd_name);
argv_array_push(&cmd.args, "--stdin");
if (!args->quiet && !args->no_progress)
argv_array_push(&cmd.args, "-v");
if (args->use_thin_pack)
argv_array_push(&cmd.args, "--fix-thin");
if (do_keep && (args->lock_pack || unpack_limit)) {
char hostname[HOST_NAME_MAX + 1];
if (xgethostname(hostname, sizeof(hostname)))
xsnprintf(hostname, sizeof(hostname), "localhost");
argv_array_pushf(&cmd.args,
"--keep=fetch-pack %"PRIuMAX " on %s",
(uintmax_t)getpid(), hostname);
}
if (args->check_self_contained_and_connected)
argv_array_push(&cmd.args, "--check-self-contained-and-connected");
if (args->from_promisor)
argv_array_push(&cmd.args, "--promisor");
}
else {
cmd_name = "unpack-objects";
argv_array_push(&cmd.args, cmd_name);
if (args->quiet || args->no_progress)
argv_array_push(&cmd.args, "-q");
args->check_self_contained_and_connected = 0;
}
if (pass_header)
argv_array_pushf(&cmd.args, "--pack_header=%"PRIu32",%"PRIu32,
ntohl(header.hdr_version),
ntohl(header.hdr_entries));
if (fetch_fsck_objects >= 0
? fetch_fsck_objects
: transfer_fsck_objects >= 0
? transfer_fsck_objects
: 0) {
if (args->from_promisor)
/*
* We cannot use --strict in index-pack because it
* checks both broken objects and links, but we only
* want to check for broken objects.
*/
argv_array_push(&cmd.args, "--fsck-objects");
else
argv_array_pushf(&cmd.args, "--strict%s",
fsck_msg_types.buf);
}
cmd.in = demux.out;
cmd.git_cmd = 1;
if (start_command(&cmd))
die(_("fetch-pack: unable to fork off %s"), cmd_name);
if (do_keep && pack_lockfile) {
*pack_lockfile = index_pack_lockfile(cmd.out);
close(cmd.out);
}
if (!use_sideband)
/* Closed by start_command() */
xd[0] = -1;
ret = finish_command(&cmd);
if (!ret || (args->check_self_contained_and_connected && ret == 1))
args->self_contained_and_connected =
args->check_self_contained_and_connected &&
ret == 0;
else
die(_("%s failed"), cmd_name);
if (use_sideband && finish_async(&demux))
die(_("error in sideband demultiplexer"));
return 0;
}
static int cmp_ref_by_name(const void *a_, const void *b_)
{
const struct ref *a = *((const struct ref **)a_);
const struct ref *b = *((const struct ref **)b_);
return strcmp(a->name, b->name);
}
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 repository *r = the_repository;
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(r, &negotiator);
sort_ref_list(&ref, ref_compare_name);
QSORT(sought, nr_sought, cmp_ref_by_name);
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("shallow"))
print_verbose(args, _("Server supports %s"), "shallow");
else if (args->depth > 0 || is_repository_shallow(r))
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 %s"), "multi_ack_detailed");
multi_ack = 2;
if (server_supports("no-done")) {
print_verbose(args, _("Server supports %s"), "no-done");
if (args->stateless_rpc)
no_done = 1;
}
}
else if (server_supports("multi_ack")) {
print_verbose(args, _("Server supports %s"), "multi_ack");
multi_ack = 1;
}
if (server_supports("side-band-64k")) {
print_verbose(args, _("Server supports %s"), "side-band-64k");
use_sideband = 2;
}
else if (server_supports("side-band")) {
print_verbose(args, _("Server supports %s"), "side-band");
use_sideband = 1;
}
if (server_supports("allow-tip-sha1-in-want")) {
print_verbose(args, _("Server supports %s"), "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 %s"), "allow-reachable-sha1-in-want");
allow_unadvertised_object_request |= ALLOW_REACHABLE_SHA1;
}
if (server_supports("thin-pack"))
print_verbose(args, _("Server supports %s"), "thin-pack");
else
args->use_thin_pack = 0;
if (server_supports("no-progress"))
print_verbose(args, _("Server supports %s"), "no-progress");
else
args->no_progress = 0;
if (server_supports("include-tag"))
print_verbose(args, _("Server supports %s"), "include-tag");
else
args->include_tag = 0;
if (server_supports("ofs-delta"))
print_verbose(args, _("Server supports %s"), "ofs-delta");
else
prefer_ofs_delta = 0;
if (server_supports("filter")) {
server_supports_filtering = 1;
print_verbose(args, _("Server supports %s"), "filter");
} else if (args->filter_options.choice) {
warning("filtering not recognized by server, ignoring");
}
if (server_supports("deepen-since")) {
print_verbose(args, _("Server supports %s"), "deepen-since");
deepen_since_ok = 1;
} else if (args->deepen_since)
die(_("Server does not support --shallow-since"));
if (server_supports("deepen-not")) {
print_verbose(args, _("Server supports %s"), "deepen-not");
deepen_not_ok = 1;
} else if (args->deepen_not)
die(_("Server does not support --shallow-exclude"));
if (server_supports("deepen-relative"))
print_verbose(args, _("Server supports %s"), "deepen-relative");
else if (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)