git/upload-pack.c
Stefan Beller d807c4a01d exec_cmd: rename to use dash in file name
This is more consistent with the project style. The majority of Git's
source files use dashes in preference to underscores in their file names.

Signed-off-by: Stefan Beller <sbeller@google.com>
2018-04-11 18:11:00 +09:00

1119 lines
28 KiB
C

#include "cache.h"
#include "config.h"
#include "refs.h"
#include "pkt-line.h"
#include "sideband.h"
#include "tag.h"
#include "object.h"
#include "commit.h"
#include "exec-cmd.h"
#include "diff.h"
#include "revision.h"
#include "list-objects.h"
#include "list-objects-filter.h"
#include "list-objects-filter-options.h"
#include "run-command.h"
#include "connect.h"
#include "sigchain.h"
#include "version.h"
#include "string-list.h"
#include "parse-options.h"
#include "argv-array.h"
#include "prio-queue.h"
#include "protocol.h"
#include "quote.h"
static const char * const upload_pack_usage[] = {
N_("git upload-pack [<options>] <dir>"),
NULL
};
/* Remember to update object flag allocation in object.h */
#define THEY_HAVE (1u << 11)
#define OUR_REF (1u << 12)
#define WANTED (1u << 13)
#define COMMON_KNOWN (1u << 14)
#define REACHABLE (1u << 15)
#define SHALLOW (1u << 16)
#define NOT_SHALLOW (1u << 17)
#define CLIENT_SHALLOW (1u << 18)
#define HIDDEN_REF (1u << 19)
static timestamp_t oldest_have;
static int deepen_relative;
static int multi_ack;
static int no_done;
static int use_thin_pack, use_ofs_delta, use_include_tag;
static int no_progress, daemon_mode;
/* 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
/* Allow request of any sha1. Implies ALLOW_TIP_SHA1 and ALLOW_REACHABLE_SHA1. */
#define ALLOW_ANY_SHA1 07
static unsigned int allow_unadvertised_object_request;
static int shallow_nr;
static struct object_array have_obj;
static struct object_array want_obj;
static struct object_array extra_edge_obj;
static unsigned int timeout;
static int keepalive = 5;
/* 0 for no sideband,
* otherwise maximum packet size (up to 65520 bytes).
*/
static int use_sideband;
static int advertise_refs;
static int stateless_rpc;
static const char *pack_objects_hook;
static int filter_capability_requested;
static int allow_filter;
static struct list_objects_filter_options filter_options;
static void reset_timeout(void)
{
alarm(timeout);
}
static void send_client_data(int fd, const char *data, ssize_t sz)
{
if (use_sideband) {
send_sideband(1, fd, data, sz, use_sideband);
return;
}
if (fd == 3)
/* emergency quit */
fd = 2;
if (fd == 2) {
/* XXX: are we happy to lose stuff here? */
xwrite(fd, data, sz);
return;
}
write_or_die(fd, data, sz);
}
static int write_one_shallow(const struct commit_graft *graft, void *cb_data)
{
FILE *fp = cb_data;
if (graft->nr_parent == -1)
fprintf(fp, "--shallow %s\n", oid_to_hex(&graft->oid));
return 0;
}
static void create_pack_file(void)
{
struct child_process pack_objects = CHILD_PROCESS_INIT;
char data[8193], progress[128];
char abort_msg[] = "aborting due to possible repository "
"corruption on the remote side.";
int buffered = -1;
ssize_t sz;
int i;
FILE *pipe_fd;
if (!pack_objects_hook)
pack_objects.git_cmd = 1;
else {
argv_array_push(&pack_objects.args, pack_objects_hook);
argv_array_push(&pack_objects.args, "git");
pack_objects.use_shell = 1;
}
if (shallow_nr) {
argv_array_push(&pack_objects.args, "--shallow-file");
argv_array_push(&pack_objects.args, "");
}
argv_array_push(&pack_objects.args, "pack-objects");
argv_array_push(&pack_objects.args, "--revs");
if (use_thin_pack)
argv_array_push(&pack_objects.args, "--thin");
argv_array_push(&pack_objects.args, "--stdout");
if (shallow_nr)
argv_array_push(&pack_objects.args, "--shallow");
if (!no_progress)
argv_array_push(&pack_objects.args, "--progress");
if (use_ofs_delta)
argv_array_push(&pack_objects.args, "--delta-base-offset");
if (use_include_tag)
argv_array_push(&pack_objects.args, "--include-tag");
if (filter_options.filter_spec) {
if (pack_objects.use_shell) {
struct strbuf buf = STRBUF_INIT;
sq_quote_buf(&buf, filter_options.filter_spec);
argv_array_pushf(&pack_objects.args, "--filter=%s", buf.buf);
strbuf_release(&buf);
} else {
argv_array_pushf(&pack_objects.args, "--filter=%s",
filter_options.filter_spec);
}
}
pack_objects.in = -1;
pack_objects.out = -1;
pack_objects.err = -1;
if (start_command(&pack_objects))
die("git upload-pack: unable to fork git-pack-objects");
pipe_fd = xfdopen(pack_objects.in, "w");
if (shallow_nr)
for_each_commit_graft(write_one_shallow, pipe_fd);
for (i = 0; i < want_obj.nr; i++)
fprintf(pipe_fd, "%s\n",
oid_to_hex(&want_obj.objects[i].item->oid));
fprintf(pipe_fd, "--not\n");
for (i = 0; i < have_obj.nr; i++)
fprintf(pipe_fd, "%s\n",
oid_to_hex(&have_obj.objects[i].item->oid));
for (i = 0; i < extra_edge_obj.nr; i++)
fprintf(pipe_fd, "%s\n",
oid_to_hex(&extra_edge_obj.objects[i].item->oid));
fprintf(pipe_fd, "\n");
fflush(pipe_fd);
fclose(pipe_fd);
/* We read from pack_objects.err to capture stderr output for
* progress bar, and pack_objects.out to capture the pack data.
*/
while (1) {
struct pollfd pfd[2];
int pe, pu, pollsize;
int ret;
reset_timeout();
pollsize = 0;
pe = pu = -1;
if (0 <= pack_objects.out) {
pfd[pollsize].fd = pack_objects.out;
pfd[pollsize].events = POLLIN;
pu = pollsize;
pollsize++;
}
if (0 <= pack_objects.err) {
pfd[pollsize].fd = pack_objects.err;
pfd[pollsize].events = POLLIN;
pe = pollsize;
pollsize++;
}
if (!pollsize)
break;
ret = poll(pfd, pollsize,
keepalive < 0 ? -1 : 1000 * keepalive);
if (ret < 0) {
if (errno != EINTR) {
error_errno("poll failed, resuming");
sleep(1);
}
continue;
}
if (0 <= pe && (pfd[pe].revents & (POLLIN|POLLHUP))) {
/* Status ready; we ship that in the side-band
* or dump to the standard error.
*/
sz = xread(pack_objects.err, progress,
sizeof(progress));
if (0 < sz)
send_client_data(2, progress, sz);
else if (sz == 0) {
close(pack_objects.err);
pack_objects.err = -1;
}
else
goto fail;
/* give priority to status messages */
continue;
}
if (0 <= pu && (pfd[pu].revents & (POLLIN|POLLHUP))) {
/* Data ready; we keep the last byte to ourselves
* in case we detect broken rev-list, so that we
* can leave the stream corrupted. This is
* unfortunate -- unpack-objects would happily
* accept a valid packdata with trailing garbage,
* so appending garbage after we pass all the
* pack data is not good enough to signal
* breakage to downstream.
*/
char *cp = data;
ssize_t outsz = 0;
if (0 <= buffered) {
*cp++ = buffered;
outsz++;
}
sz = xread(pack_objects.out, cp,
sizeof(data) - outsz);
if (0 < sz)
;
else if (sz == 0) {
close(pack_objects.out);
pack_objects.out = -1;
}
else
goto fail;
sz += outsz;
if (1 < sz) {
buffered = data[sz-1] & 0xFF;
sz--;
}
else
buffered = -1;
send_client_data(1, data, sz);
}
/*
* We hit the keepalive timeout without saying anything; send
* an empty message on the data sideband just to let the other
* side know we're still working on it, but don't have any data
* yet.
*
* If we don't have a sideband channel, there's no room in the
* protocol to say anything, so those clients are just out of
* luck.
*/
if (!ret && use_sideband) {
static const char buf[] = "0005\1";
write_or_die(1, buf, 5);
}
}
if (finish_command(&pack_objects)) {
error("git upload-pack: git-pack-objects died with error.");
goto fail;
}
/* flush the data */
if (0 <= buffered) {
data[0] = buffered;
send_client_data(1, data, 1);
fprintf(stderr, "flushed.\n");
}
if (use_sideband)
packet_flush(1);
return;
fail:
send_client_data(3, abort_msg, sizeof(abort_msg));
die("git upload-pack: %s", abort_msg);
}
static int got_oid(const char *hex, struct object_id *oid)
{
struct object *o;
int we_knew_they_have = 0;
if (get_oid_hex(hex, oid))
die("git upload-pack: expected SHA1 object, got '%s'", hex);
if (!has_object_file(oid))
return -1;
o = parse_object(oid);
if (!o)
die("oops (%s)", oid_to_hex(oid));
if (o->type == OBJ_COMMIT) {
struct commit_list *parents;
struct commit *commit = (struct commit *)o;
if (o->flags & THEY_HAVE)
we_knew_they_have = 1;
else
o->flags |= THEY_HAVE;
if (!oldest_have || (commit->date < oldest_have))
oldest_have = commit->date;
for (parents = commit->parents;
parents;
parents = parents->next)
parents->item->object.flags |= THEY_HAVE;
}
if (!we_knew_they_have) {
add_object_array(o, NULL, &have_obj);
return 1;
}
return 0;
}
static int reachable(struct commit *want)
{
struct prio_queue work = { compare_commits_by_commit_date };
prio_queue_put(&work, want);
while (work.nr) {
struct commit_list *list;
struct commit *commit = prio_queue_get(&work);
if (commit->object.flags & THEY_HAVE) {
want->object.flags |= COMMON_KNOWN;
break;
}
if (!commit->object.parsed)
parse_object(&commit->object.oid);
if (commit->object.flags & REACHABLE)
continue;
commit->object.flags |= REACHABLE;
if (commit->date < oldest_have)
continue;
for (list = commit->parents; list; list = list->next) {
struct commit *parent = list->item;
if (!(parent->object.flags & REACHABLE))
prio_queue_put(&work, parent);
}
}
want->object.flags |= REACHABLE;
clear_commit_marks(want, REACHABLE);
clear_prio_queue(&work);
return (want->object.flags & COMMON_KNOWN);
}
static int ok_to_give_up(void)
{
int i;
if (!have_obj.nr)
return 0;
for (i = 0; i < want_obj.nr; i++) {
struct object *want = want_obj.objects[i].item;
if (want->flags & COMMON_KNOWN)
continue;
want = deref_tag(want, "a want line", 0);
if (!want || want->type != OBJ_COMMIT) {
/* no way to tell if this is reachable by
* looking at the ancestry chain alone, so
* leave a note to ourselves not to worry about
* this object anymore.
*/
want_obj.objects[i].item->flags |= COMMON_KNOWN;
continue;
}
if (!reachable((struct commit *)want))
return 0;
}
return 1;
}
static int get_common_commits(void)
{
struct object_id oid;
char last_hex[GIT_MAX_HEXSZ + 1];
int got_common = 0;
int got_other = 0;
int sent_ready = 0;
save_commit_buffer = 0;
for (;;) {
char *line = packet_read_line(0, NULL);
const char *arg;
reset_timeout();
if (!line) {
if (multi_ack == 2 && got_common
&& !got_other && ok_to_give_up()) {
sent_ready = 1;
packet_write_fmt(1, "ACK %s ready\n", last_hex);
}
if (have_obj.nr == 0 || multi_ack)
packet_write_fmt(1, "NAK\n");
if (no_done && sent_ready) {
packet_write_fmt(1, "ACK %s\n", last_hex);
return 0;
}
if (stateless_rpc)
exit(0);
got_common = 0;
got_other = 0;
continue;
}
if (skip_prefix(line, "have ", &arg)) {
switch (got_oid(arg, &oid)) {
case -1: /* they have what we do not */
got_other = 1;
if (multi_ack && ok_to_give_up()) {
const char *hex = oid_to_hex(&oid);
if (multi_ack == 2) {
sent_ready = 1;
packet_write_fmt(1, "ACK %s ready\n", hex);
} else
packet_write_fmt(1, "ACK %s continue\n", hex);
}
break;
default:
got_common = 1;
memcpy(last_hex, oid_to_hex(&oid), 41);
if (multi_ack == 2)
packet_write_fmt(1, "ACK %s common\n", last_hex);
else if (multi_ack)
packet_write_fmt(1, "ACK %s continue\n", last_hex);
else if (have_obj.nr == 1)
packet_write_fmt(1, "ACK %s\n", last_hex);
break;
}
continue;
}
if (!strcmp(line, "done")) {
if (have_obj.nr > 0) {
if (multi_ack)
packet_write_fmt(1, "ACK %s\n", last_hex);
return 0;
}
packet_write_fmt(1, "NAK\n");
return -1;
}
die("git upload-pack: expected SHA1 list, got '%s'", line);
}
}
static int is_our_ref(struct object *o)
{
int allow_hidden_ref = (allow_unadvertised_object_request &
(ALLOW_TIP_SHA1 | ALLOW_REACHABLE_SHA1));
return o->flags & ((allow_hidden_ref ? HIDDEN_REF : 0) | OUR_REF);
}
/*
* on successful case, it's up to the caller to close cmd->out
*/
static int do_reachable_revlist(struct child_process *cmd,
struct object_array *src,
struct object_array *reachable)
{
static const char *argv[] = {
"rev-list", "--stdin", NULL,
};
struct object *o;
char namebuf[42]; /* ^ + SHA-1 + LF */
int i;
cmd->argv = argv;
cmd->git_cmd = 1;
cmd->no_stderr = 1;
cmd->in = -1;
cmd->out = -1;
/*
* If the next rev-list --stdin encounters an unknown commit,
* it terminates, which will cause SIGPIPE in the write loop
* below.
*/
sigchain_push(SIGPIPE, SIG_IGN);
if (start_command(cmd))
goto error;
namebuf[0] = '^';
namebuf[GIT_SHA1_HEXSZ + 1] = '\n';
for (i = get_max_object_index(); 0 < i; ) {
o = get_indexed_object(--i);
if (!o)
continue;
if (reachable && o->type == OBJ_COMMIT)
o->flags &= ~TMP_MARK;
if (!is_our_ref(o))
continue;
memcpy(namebuf + 1, oid_to_hex(&o->oid), GIT_SHA1_HEXSZ);
if (write_in_full(cmd->in, namebuf, GIT_SHA1_HEXSZ + 2) < 0)
goto error;
}
namebuf[GIT_SHA1_HEXSZ] = '\n';
for (i = 0; i < src->nr; i++) {
o = src->objects[i].item;
if (is_our_ref(o)) {
if (reachable)
add_object_array(o, NULL, reachable);
continue;
}
if (reachable && o->type == OBJ_COMMIT)
o->flags |= TMP_MARK;
memcpy(namebuf, oid_to_hex(&o->oid), GIT_SHA1_HEXSZ);
if (write_in_full(cmd->in, namebuf, GIT_SHA1_HEXSZ + 1) < 0)
goto error;
}
close(cmd->in);
cmd->in = -1;
sigchain_pop(SIGPIPE);
return 0;
error:
sigchain_pop(SIGPIPE);
if (cmd->in >= 0)
close(cmd->in);
if (cmd->out >= 0)
close(cmd->out);
return -1;
}
static int get_reachable_list(struct object_array *src,
struct object_array *reachable)
{
struct child_process cmd = CHILD_PROCESS_INIT;
int i;
struct object *o;
char namebuf[42]; /* ^ + SHA-1 + LF */
if (do_reachable_revlist(&cmd, src, reachable) < 0)
return -1;
while ((i = read_in_full(cmd.out, namebuf, 41)) == 41) {
struct object_id sha1;
if (namebuf[40] != '\n' || get_oid_hex(namebuf, &sha1))
break;
o = lookup_object(sha1.hash);
if (o && o->type == OBJ_COMMIT) {
o->flags &= ~TMP_MARK;
}
}
for (i = get_max_object_index(); 0 < i; i--) {
o = get_indexed_object(i - 1);
if (o && o->type == OBJ_COMMIT &&
(o->flags & TMP_MARK)) {
add_object_array(o, NULL, reachable);
o->flags &= ~TMP_MARK;
}
}
close(cmd.out);
if (finish_command(&cmd))
return -1;
return 0;
}
static int has_unreachable(struct object_array *src)
{
struct child_process cmd = CHILD_PROCESS_INIT;
char buf[1];
int i;
if (do_reachable_revlist(&cmd, src, NULL) < 0)
return 1;
/*
* The commits out of the rev-list are not ancestors of
* our ref.
*/
i = read_in_full(cmd.out, buf, 1);
if (i)
goto error;
close(cmd.out);
cmd.out = -1;
/*
* rev-list may have died by encountering a bad commit
* in the history, in which case we do want to bail out
* even when it showed no commit.
*/
if (finish_command(&cmd))
goto error;
/* All the non-tip ones are ancestors of what we advertised */
return 0;
error:
sigchain_pop(SIGPIPE);
if (cmd.out >= 0)
close(cmd.out);
return 1;
}
static void check_non_tip(void)
{
int i;
/*
* In the normal in-process case without
* uploadpack.allowReachableSHA1InWant,
* non-tip requests can never happen.
*/
if (!stateless_rpc && !(allow_unadvertised_object_request & ALLOW_REACHABLE_SHA1))
goto error;
if (!has_unreachable(&want_obj))
/* All the non-tip ones are ancestors of what we advertised */
return;
error:
/* Pick one of them (we know there at least is one) */
for (i = 0; i < want_obj.nr; i++) {
struct object *o = want_obj.objects[i].item;
if (!is_our_ref(o))
die("git upload-pack: not our ref %s",
oid_to_hex(&o->oid));
}
}
static void send_shallow(struct commit_list *result)
{
while (result) {
struct object *object = &result->item->object;
if (!(object->flags & (CLIENT_SHALLOW|NOT_SHALLOW))) {
packet_write_fmt(1, "shallow %s",
oid_to_hex(&object->oid));
register_shallow(&object->oid);
shallow_nr++;
}
result = result->next;
}
}
static void send_unshallow(const struct object_array *shallows)
{
int i;
for (i = 0; i < shallows->nr; i++) {
struct object *object = shallows->objects[i].item;
if (object->flags & NOT_SHALLOW) {
struct commit_list *parents;
packet_write_fmt(1, "unshallow %s",
oid_to_hex(&object->oid));
object->flags &= ~CLIENT_SHALLOW;
/*
* We want to _register_ "object" as shallow, but we
* also need to traverse object's parents to deepen a
* shallow clone. Unregister it for now so we can
* parse and add the parents to the want list, then
* re-register it.
*/
unregister_shallow(&object->oid);
object->parsed = 0;
parse_commit_or_die((struct commit *)object);
parents = ((struct commit *)object)->parents;
while (parents) {
add_object_array(&parents->item->object,
NULL, &want_obj);
parents = parents->next;
}
add_object_array(object, NULL, &extra_edge_obj);
}
/* make sure commit traversal conforms to client */
register_shallow(&object->oid);
}
}
static void deepen(int depth, int deepen_relative,
struct object_array *shallows)
{
if (depth == INFINITE_DEPTH && !is_repository_shallow()) {
int i;
for (i = 0; i < shallows->nr; i++) {
struct object *object = shallows->objects[i].item;
object->flags |= NOT_SHALLOW;
}
} else if (deepen_relative) {
struct object_array reachable_shallows = OBJECT_ARRAY_INIT;
struct commit_list *result;
get_reachable_list(shallows, &reachable_shallows);
result = get_shallow_commits(&reachable_shallows,
depth + 1,
SHALLOW, NOT_SHALLOW);
send_shallow(result);
free_commit_list(result);
object_array_clear(&reachable_shallows);
} else {
struct commit_list *result;
result = get_shallow_commits(&want_obj, depth,
SHALLOW, NOT_SHALLOW);
send_shallow(result);
free_commit_list(result);
}
send_unshallow(shallows);
packet_flush(1);
}
static void deepen_by_rev_list(int ac, const char **av,
struct object_array *shallows)
{
struct commit_list *result;
result = get_shallow_commits_by_rev_list(ac, av, SHALLOW, NOT_SHALLOW);
send_shallow(result);
free_commit_list(result);
send_unshallow(shallows);
packet_flush(1);
}
static void receive_needs(void)
{
struct object_array shallows = OBJECT_ARRAY_INIT;
struct string_list deepen_not = STRING_LIST_INIT_DUP;
int depth = 0;
int has_non_tip = 0;
timestamp_t deepen_since = 0;
int deepen_rev_list = 0;
shallow_nr = 0;
for (;;) {
struct object *o;
const char *features;
struct object_id oid_buf;
char *line = packet_read_line(0, NULL);
const char *arg;
reset_timeout();
if (!line)
break;
if (skip_prefix(line, "shallow ", &arg)) {
struct object_id oid;
struct object *object;
if (get_oid_hex(arg, &oid))
die("invalid shallow line: %s", line);
object = parse_object(&oid);
if (!object)
continue;
if (object->type != OBJ_COMMIT)
die("invalid shallow object %s", oid_to_hex(&oid));
if (!(object->flags & CLIENT_SHALLOW)) {
object->flags |= CLIENT_SHALLOW;
add_object_array(object, NULL, &shallows);
}
continue;
}
if (skip_prefix(line, "deepen ", &arg)) {
char *end = NULL;
depth = strtol(arg, &end, 0);
if (!end || *end || depth <= 0)
die("Invalid deepen: %s", line);
continue;
}
if (skip_prefix(line, "deepen-since ", &arg)) {
char *end = NULL;
deepen_since = parse_timestamp(arg, &end, 0);
if (!end || *end || !deepen_since ||
/* revisions.c's max_age -1 is special */
deepen_since == -1)
die("Invalid deepen-since: %s", line);
deepen_rev_list = 1;
continue;
}
if (skip_prefix(line, "deepen-not ", &arg)) {
char *ref = NULL;
struct object_id oid;
if (expand_ref(arg, strlen(arg), &oid, &ref) != 1)
die("git upload-pack: ambiguous deepen-not: %s", line);
string_list_append(&deepen_not, ref);
free(ref);
deepen_rev_list = 1;
continue;
}
if (skip_prefix(line, "filter ", &arg)) {
if (!filter_capability_requested)
die("git upload-pack: filtering capability not negotiated");
parse_list_objects_filter(&filter_options, arg);
continue;
}
if (!skip_prefix(line, "want ", &arg) ||
get_oid_hex(arg, &oid_buf))
die("git upload-pack: protocol error, "
"expected to get sha, not '%s'", line);
features = arg + 40;
if (parse_feature_request(features, "deepen-relative"))
deepen_relative = 1;
if (parse_feature_request(features, "multi_ack_detailed"))
multi_ack = 2;
else if (parse_feature_request(features, "multi_ack"))
multi_ack = 1;
if (parse_feature_request(features, "no-done"))
no_done = 1;
if (parse_feature_request(features, "thin-pack"))
use_thin_pack = 1;
if (parse_feature_request(features, "ofs-delta"))
use_ofs_delta = 1;
if (parse_feature_request(features, "side-band-64k"))
use_sideband = LARGE_PACKET_MAX;
else if (parse_feature_request(features, "side-band"))
use_sideband = DEFAULT_PACKET_MAX;
if (parse_feature_request(features, "no-progress"))
no_progress = 1;
if (parse_feature_request(features, "include-tag"))
use_include_tag = 1;
if (allow_filter && parse_feature_request(features, "filter"))
filter_capability_requested = 1;
o = parse_object(&oid_buf);
if (!o) {
packet_write_fmt(1,
"ERR upload-pack: not our ref %s",
oid_to_hex(&oid_buf));
die("git upload-pack: not our ref %s",
oid_to_hex(&oid_buf));
}
if (!(o->flags & WANTED)) {
o->flags |= WANTED;
if (!((allow_unadvertised_object_request & ALLOW_ANY_SHA1) == ALLOW_ANY_SHA1
|| is_our_ref(o)))
has_non_tip = 1;
add_object_array(o, NULL, &want_obj);
}
}
/*
* We have sent all our refs already, and the other end
* should have chosen out of them. When we are operating
* in the stateless RPC mode, however, their choice may
* have been based on the set of older refs advertised
* by another process that handled the initial request.
*/
if (has_non_tip)
check_non_tip();
if (!use_sideband && daemon_mode)
no_progress = 1;
if (depth == 0 && !deepen_rev_list && shallows.nr == 0)
return;
if (depth > 0 && deepen_rev_list)
die("git upload-pack: deepen and deepen-since (or deepen-not) cannot be used together");
if (depth > 0)
deepen(depth, deepen_relative, &shallows);
else if (deepen_rev_list) {
struct argv_array av = ARGV_ARRAY_INIT;
int i;
argv_array_push(&av, "rev-list");
if (deepen_since)
argv_array_pushf(&av, "--max-age=%"PRItime, deepen_since);
if (deepen_not.nr) {
argv_array_push(&av, "--not");
for (i = 0; i < deepen_not.nr; i++) {
struct string_list_item *s = deepen_not.items + i;
argv_array_push(&av, s->string);
}
argv_array_push(&av, "--not");
}
for (i = 0; i < want_obj.nr; i++) {
struct object *o = want_obj.objects[i].item;
argv_array_push(&av, oid_to_hex(&o->oid));
}
deepen_by_rev_list(av.argc, av.argv, &shallows);
argv_array_clear(&av);
}
else
if (shallows.nr > 0) {
int i;
for (i = 0; i < shallows.nr; i++)
register_shallow(&shallows.objects[i].item->oid);
}
shallow_nr += shallows.nr;
object_array_clear(&shallows);
}
/* return non-zero if the ref is hidden, otherwise 0 */
static int mark_our_ref(const char *refname, const char *refname_full,
const struct object_id *oid)
{
struct object *o = lookup_unknown_object(oid->hash);
if (ref_is_hidden(refname, refname_full)) {
o->flags |= HIDDEN_REF;
return 1;
}
o->flags |= OUR_REF;
return 0;
}
static int check_ref(const char *refname_full, const struct object_id *oid,
int flag, void *cb_data)
{
const char *refname = strip_namespace(refname_full);
mark_our_ref(refname, refname_full, oid);
return 0;
}
static void format_symref_info(struct strbuf *buf, struct string_list *symref)
{
struct string_list_item *item;
if (!symref->nr)
return;
for_each_string_list_item(item, symref)
strbuf_addf(buf, " symref=%s:%s", item->string, (char *)item->util);
}
static int send_ref(const char *refname, const struct object_id *oid,
int flag, void *cb_data)
{
static const char *capabilities = "multi_ack thin-pack side-band"
" side-band-64k ofs-delta shallow deepen-since deepen-not"
" deepen-relative no-progress include-tag multi_ack_detailed";
const char *refname_nons = strip_namespace(refname);
struct object_id peeled;
if (mark_our_ref(refname_nons, refname, oid))
return 0;
if (capabilities) {
struct strbuf symref_info = STRBUF_INIT;
format_symref_info(&symref_info, cb_data);
packet_write_fmt(1, "%s %s%c%s%s%s%s%s%s agent=%s\n",
oid_to_hex(oid), refname_nons,
0, capabilities,
(allow_unadvertised_object_request & ALLOW_TIP_SHA1) ?
" allow-tip-sha1-in-want" : "",
(allow_unadvertised_object_request & ALLOW_REACHABLE_SHA1) ?
" allow-reachable-sha1-in-want" : "",
stateless_rpc ? " no-done" : "",
symref_info.buf,
allow_filter ? " filter" : "",
git_user_agent_sanitized());
strbuf_release(&symref_info);
} else {
packet_write_fmt(1, "%s %s\n", oid_to_hex(oid), refname_nons);
}
capabilities = NULL;
if (!peel_ref(refname, &peeled))
packet_write_fmt(1, "%s %s^{}\n", oid_to_hex(&peeled), refname_nons);
return 0;
}
static int find_symref(const char *refname, const struct object_id *oid,
int flag, void *cb_data)
{
const char *symref_target;
struct string_list_item *item;
if ((flag & REF_ISSYMREF) == 0)
return 0;
symref_target = resolve_ref_unsafe(refname, 0, NULL, &flag);
if (!symref_target || (flag & REF_ISSYMREF) == 0)
die("'%s' is a symref but it is not?", refname);
item = string_list_append(cb_data, refname);
item->util = xstrdup(symref_target);
return 0;
}
static void upload_pack(void)
{
struct string_list symref = STRING_LIST_INIT_DUP;
head_ref_namespaced(find_symref, &symref);
if (advertise_refs || !stateless_rpc) {
reset_timeout();
head_ref_namespaced(send_ref, &symref);
for_each_namespaced_ref(send_ref, &symref);
advertise_shallow_grafts(1);
packet_flush(1);
} else {
head_ref_namespaced(check_ref, NULL);
for_each_namespaced_ref(check_ref, NULL);
}
string_list_clear(&symref, 1);
if (advertise_refs)
return;
receive_needs();
if (want_obj.nr) {
get_common_commits();
create_pack_file();
}
}
static int upload_pack_config(const char *var, const char *value, void *unused)
{
if (!strcmp("uploadpack.allowtipsha1inwant", var)) {
if (git_config_bool(var, value))
allow_unadvertised_object_request |= ALLOW_TIP_SHA1;
else
allow_unadvertised_object_request &= ~ALLOW_TIP_SHA1;
} else if (!strcmp("uploadpack.allowreachablesha1inwant", var)) {
if (git_config_bool(var, value))
allow_unadvertised_object_request |= ALLOW_REACHABLE_SHA1;
else
allow_unadvertised_object_request &= ~ALLOW_REACHABLE_SHA1;
} else if (!strcmp("uploadpack.allowanysha1inwant", var)) {
if (git_config_bool(var, value))
allow_unadvertised_object_request |= ALLOW_ANY_SHA1;
else
allow_unadvertised_object_request &= ~ALLOW_ANY_SHA1;
} else if (!strcmp("uploadpack.keepalive", var)) {
keepalive = git_config_int(var, value);
if (!keepalive)
keepalive = -1;
} else if (current_config_scope() != CONFIG_SCOPE_REPO) {
if (!strcmp("uploadpack.packobjectshook", var))
return git_config_string(&pack_objects_hook, var, value);
} else if (!strcmp("uploadpack.allowfilter", var)) {
allow_filter = git_config_bool(var, value);
}
return parse_hide_refs_config(var, value, "uploadpack");
}
int cmd_main(int argc, const char **argv)
{
const char *dir;
int strict = 0;
struct option options[] = {
OPT_BOOL(0, "stateless-rpc", &stateless_rpc,
N_("quit after a single request/response exchange")),
OPT_BOOL(0, "advertise-refs", &advertise_refs,
N_("exit immediately after initial ref advertisement")),
OPT_BOOL(0, "strict", &strict,
N_("do not try <directory>/.git/ if <directory> is no Git directory")),
OPT_INTEGER(0, "timeout", &timeout,
N_("interrupt transfer after <n> seconds of inactivity")),
OPT_END()
};
packet_trace_identity("upload-pack");
check_replace_refs = 0;
argc = parse_options(argc, argv, NULL, options, upload_pack_usage, 0);
if (argc != 1)
usage_with_options(upload_pack_usage, options);
if (timeout)
daemon_mode = 1;
setup_path();
dir = argv[0];
if (!enter_repo(dir, strict))
die("'%s' does not appear to be a git repository", dir);
git_config(upload_pack_config, NULL);
switch (determine_protocol_version_server()) {
case protocol_v1:
/*
* v1 is just the original protocol with a version string,
* so just fall through after writing the version string.
*/
if (advertise_refs || !stateless_rpc)
packet_write_fmt(1, "version 1\n");
/* fallthrough */
case protocol_v0:
upload_pack();
break;
case protocol_unknown_version:
BUG("unknown protocol version");
}
return 0;
}