[git/git.git] / send-pack.c

#include "builtin.h"
#include "commit.h"
#include "refs.h"
#include "pkt-line.h"
#include "sideband.h"
#include "run-command.h"
#include "remote.h"
#include "connect.h"
#include "send-pack.h"
#include "quote.h"
#include "transport.h"
#include "version.h"
#include "sha1-array.h"
#include "gpg-interface.h"

static int feed_object(const unsigned char *sha1, int fd, int negative)
{
	char buf[42];

	if (negative && !has_sha1_file(sha1))
		return 1;

	memcpy(buf + negative, sha1_to_hex(sha1), 40);
	if (negative)
		buf[0] = '^';
	buf[40 + negative] = '\n';
	return write_or_whine(fd, buf, 41 + negative, "send-pack: send refs");
}

/*
 * Make a pack stream and spit it out into file descriptor fd
 */
static int pack_objects(int fd, struct ref *refs, struct sha1_array *extra, struct send_pack_args *args)
{
	/*
	 * The child becomes pack-objects --revs; we feed
	 * the revision parameters to it via its stdin and
	 * let its stdout go back to the other end.
	 */
	const char *argv[] = {
		"pack-objects",
		"--all-progress-implied",
		"--revs",
		"--stdout",
		NULL,
		NULL,
		NULL,
		NULL,
		NULL,
	};
	struct child_process po;
	int i;

	i = 4;
	if (args->use_thin_pack)
		argv[i++] = "--thin";
	if (args->use_ofs_delta)
		argv[i++] = "--delta-base-offset";
	if (args->quiet || !args->progress)
		argv[i++] = "-q";
	if (args->progress)
		argv[i++] = "--progress";
	memset(&po, 0, sizeof(po));
	po.argv = argv;
	po.in = -1;
	po.out = args->stateless_rpc ? -1 : fd;
	po.git_cmd = 1;
	if (start_command(&po))
		die_errno("git pack-objects failed");

	/*
	 * We feed the pack-objects we just spawned with revision
	 * parameters by writing to the pipe.
	 */
	for (i = 0; i < extra->nr; i++)
		if (!feed_object(extra->sha1[i], po.in, 1))
			break;

	while (refs) {
		if (!is_null_sha1(refs->old_sha1) &&
		    !feed_object(refs->old_sha1, po.in, 1))
			break;
		if (!is_null_sha1(refs->new_sha1) &&
		    !feed_object(refs->new_sha1, po.in, 0))
			break;
		refs = refs->next;
	}

	close(po.in);

	if (args->stateless_rpc) {
		char *buf = xmalloc(LARGE_PACKET_MAX);
		while (1) {
			ssize_t n = xread(po.out, buf, LARGE_PACKET_MAX);
			if (n <= 0)
				break;
			send_sideband(fd, -1, buf, n, LARGE_PACKET_MAX);
		}
		free(buf);
		close(po.out);
		po.out = -1;
	}

	if (finish_command(&po))
		return -1;
	return 0;
}

static int receive_status(int in, struct ref *refs)
{
	struct ref *hint;
	int ret = 0;
	char *line = packet_read_line(in, NULL);
	if (!starts_with(line, "unpack "))
		return error("did not receive remote status");
	if (strcmp(line, "unpack ok")) {
		error("unpack failed: %s", line + 7);
		ret = -1;
	}
	hint = NULL;
	while (1) {
		char *refname;
		char *msg;
		line = packet_read_line(in, NULL);
		if (!line)
			break;
		if (!starts_with(line, "ok ") && !starts_with(line, "ng ")) {
			error("invalid ref status from remote: %s", line);
			ret = -1;
			break;
		}

		refname = line + 3;
		msg = strchr(refname, ' ');
		if (msg)
			*msg++ = '\0';

		/* first try searching at our hint, falling back to all refs */
		if (hint)
			hint = find_ref_by_name(hint, refname);
		if (!hint)
			hint = find_ref_by_name(refs, refname);
		if (!hint) {
			warning("remote reported status on unknown ref: %s",
					refname);
			continue;
		}
		if (hint->status != REF_STATUS_EXPECTING_REPORT) {
			warning("remote reported status on unexpected ref: %s",
					refname);
			continue;
		}

		if (line[0] == 'o' && line[1] == 'k')
			hint->status = REF_STATUS_OK;
		else {
			hint->status = REF_STATUS_REMOTE_REJECT;
			ret = -1;
		}
		if (msg)
			hint->remote_status = xstrdup(msg);
		/* start our next search from the next ref */
		hint = hint->next;
	}
	return ret;
}

static int sideband_demux(int in, int out, void *data)
{
	int *fd = data, ret;
#ifdef NO_PTHREADS
	close(fd[1]);
#endif
	ret = recv_sideband("send-pack", fd[0], out);
	close(out);
	return ret;
}

static int advertise_shallow_grafts_cb(const struct commit_graft *graft, void *cb)
{
	struct strbuf *sb = cb;
	if (graft->nr_parent == -1)
		packet_buf_write(sb, "shallow %s\n", sha1_to_hex(graft->sha1));
	return 0;
}

static void advertise_shallow_grafts_buf(struct strbuf *sb)
{
	if (!is_repository_shallow())
		return;
	for_each_commit_graft(advertise_shallow_grafts_cb, sb);
}

static int ref_update_to_be_sent(const struct ref *ref, const struct send_pack_args *args)
{
	if (!ref->peer_ref && !args->send_mirror)
		return 0;

	/* Check for statuses set by set_ref_status_for_push() */
	switch (ref->status) {
	case REF_STATUS_REJECT_NONFASTFORWARD:
	case REF_STATUS_REJECT_ALREADY_EXISTS:
	case REF_STATUS_REJECT_FETCH_FIRST:
	case REF_STATUS_REJECT_NEEDS_FORCE:
	case REF_STATUS_REJECT_STALE:
	case REF_STATUS_REJECT_NODELETE:
	case REF_STATUS_UPTODATE:
		return 0;
	default:
		return 1;
	}
}

/*
 * the beginning of the next line, or the end of buffer.
 *
 * NEEDSWORK: perhaps move this to git-compat-util.h or somewhere and
 * convert many similar uses found by "git grep -A4 memchr".
 */
static const char *next_line(const char *line, size_t len)
{
	const char *nl = memchr(line, '\n', len);
	if (!nl)
		return line + len; /* incomplete line */
	return nl + 1;
}

static int generate_push_cert(struct strbuf *req_buf,
			      const struct ref *remote_refs,
			      struct send_pack_args *args,
			      const char *cap_string)
{
	const struct ref *ref;
	char stamp[60];
	char *signing_key = xstrdup(get_signing_key());
	const char *cp, *np;
	struct strbuf cert = STRBUF_INIT;
	int update_seen = 0;

	datestamp(stamp, sizeof(stamp));
	strbuf_addf(&cert, "certificate version 0.1\n");
	strbuf_addf(&cert, "pusher %s %s\n", signing_key, stamp);
	strbuf_addstr(&cert, "\n");

	for (ref = remote_refs; ref; ref = ref->next) {
		if (!ref_update_to_be_sent(ref, args))
			continue;
		update_seen = 1;
		strbuf_addf(&cert, "%s %s %s\n",
			    sha1_to_hex(ref->old_sha1),
			    sha1_to_hex(ref->new_sha1),
			    ref->name);
	}
	if (!update_seen)
		goto free_return;

	if (sign_buffer(&cert, &cert, signing_key))
		die(_("failed to sign the push certificate"));

	packet_buf_write(req_buf, "push-cert%c%s", 0, cap_string);
	for (cp = cert.buf; cp < cert.buf + cert.len; cp = np) {
		np = next_line(cp, cert.buf + cert.len - cp);
		packet_buf_write(req_buf,
				 "%.*s", (int)(np - cp), cp);
	}
	packet_buf_write(req_buf, "push-cert-end\n");

free_return:
	free(signing_key);
	strbuf_release(&cert);
	return update_seen;
}

int send_pack(struct send_pack_args *args,
	      int fd[], struct child_process *conn,
	      struct ref *remote_refs,
	      struct sha1_array *extra_have)
{
	int in = fd[0];
	int out = fd[1];
	struct strbuf req_buf = STRBUF_INIT;
	struct strbuf cap_buf = STRBUF_INIT;
	struct ref *ref;
	int need_pack_data = 0;
	int allow_deleting_refs = 0;
	int status_report = 0;
	int use_sideband = 0;
	int quiet_supported = 0;
	int agent_supported = 0;
	unsigned cmds_sent = 0;
	int ret;
	struct async demux;

	/* Does the other end support the reporting? */
	if (server_supports("report-status"))
		status_report = 1;
	if (server_supports("delete-refs"))
		allow_deleting_refs = 1;
	if (server_supports("ofs-delta"))
		args->use_ofs_delta = 1;
	if (server_supports("side-band-64k"))
		use_sideband = 1;
	if (server_supports("quiet"))
		quiet_supported = 1;
	if (server_supports("agent"))
		agent_supported = 1;
	if (server_supports("no-thin"))
		args->use_thin_pack = 0;
	if (args->push_cert && !server_supports("push-cert"))
		die(_("the receiving end does not support --signed push"));

	if (!remote_refs) {
		fprintf(stderr, "No refs in common and none specified; doing nothing.\n"
			"Perhaps you should specify a branch such as 'master'.\n");
		return 0;
	}

	if (status_report)
		strbuf_addstr(&cap_buf, " report-status");
	if (use_sideband)
		strbuf_addstr(&cap_buf, " side-band-64k");
	if (quiet_supported && (args->quiet || !args->progress))
		strbuf_addstr(&cap_buf, " quiet");
	if (agent_supported)
		strbuf_addf(&cap_buf, " agent=%s", git_user_agent_sanitized());

	/*
	 * NEEDSWORK: why does delete-refs have to be so specific to
	 * send-pack machinery that set_ref_status_for_push() cannot
	 * set this bit for us???
	 */
	for (ref = remote_refs; ref; ref = ref->next)
		if (ref->deletion && !allow_deleting_refs)
			ref->status = REF_STATUS_REJECT_NODELETE;

	if (!args->dry_run)
		advertise_shallow_grafts_buf(&req_buf);

	if (!args->dry_run && args->push_cert)
		cmds_sent = generate_push_cert(&req_buf, remote_refs, args,
					       cap_buf.buf);

	/*
	 * Clear the status for each ref and see if we need to send
	 * the pack data.
	 */
	for (ref = remote_refs; ref; ref = ref->next) {
		if (!ref_update_to_be_sent(ref, args))
			continue;

		if (!ref->deletion)
			need_pack_data = 1;

		if (args->dry_run || !status_report)
			ref->status = REF_STATUS_OK;
		else
			ref->status = REF_STATUS_EXPECTING_REPORT;
	}

	/*
	 * Finally, tell the other end!
	 */
	for (ref = remote_refs; ref; ref = ref->next) {
		char *old_hex, *new_hex;

		if (args->dry_run || args->push_cert)
			continue;

		if (!ref_update_to_be_sent(ref, args))
			continue;

		old_hex = sha1_to_hex(ref->old_sha1);
		new_hex = sha1_to_hex(ref->new_sha1);
		if (!cmds_sent) {
			packet_buf_write(&req_buf,
					 "%s %s %s%c%s",
					 old_hex, new_hex, ref->name, 0,
					 cap_buf.buf);
			cmds_sent = 1;
		} else {
			packet_buf_write(&req_buf, "%s %s %s",
					 old_hex, new_hex, ref->name);
		}
	}

	if (args->stateless_rpc) {
		if (!args->dry_run && (cmds_sent || is_repository_shallow())) {
			packet_buf_flush(&req_buf);
			send_sideband(out, -1, req_buf.buf, req_buf.len, LARGE_PACKET_MAX);
		}
	} else {
		write_or_die(out, req_buf.buf, req_buf.len);
		packet_flush(out);
	}
	strbuf_release(&req_buf);
	strbuf_release(&cap_buf);

	if (use_sideband && cmds_sent) {
		memset(&demux, 0, sizeof(demux));
		demux.proc = sideband_demux;
		demux.data = fd;
		demux.out = -1;
		if (start_async(&demux))
			die("send-pack: unable to fork off sideband demultiplexer");
		in = demux.out;
	}

	if (need_pack_data && cmds_sent) {
		if (pack_objects(out, remote_refs, extra_have, args) < 0) {
			for (ref = remote_refs; ref; ref = ref->next)
				ref->status = REF_STATUS_NONE;
			if (args->stateless_rpc)
				close(out);
			if (git_connection_is_socket(conn))
				shutdown(fd[0], SHUT_WR);
			if (use_sideband)
				finish_async(&demux);
			fd[1] = -1;
			return -1;
		}
		if (!args->stateless_rpc)
			/* Closed by pack_objects() via start_command() */
			fd[1] = -1;
	}
	if (args->stateless_rpc && cmds_sent)
		packet_flush(out);

	if (status_report && cmds_sent)
		ret = receive_status(in, remote_refs);
	else
		ret = 0;
	if (args->stateless_rpc)
		packet_flush(out);

	if (use_sideband && cmds_sent) {
		if (finish_async(&demux)) {
			error("error in sideband demultiplexer");
			ret = -1;
		}
		close(demux.out);
	}

	if (ret < 0)
		return ret;

	if (args->porcelain)
		return 0;

	for (ref = remote_refs; ref; ref = ref->next) {
		switch (ref->status) {
		case REF_STATUS_NONE:
		case REF_STATUS_UPTODATE:
		case REF_STATUS_OK:
			break;
		default:
			return -1;
		}
	}
	return 0;
}
Commit	Line	Data
f5d942e1 NTND	1	#include "builtin.h"
	2	#include "commit.h"
	3	#include "refs.h"
	4	#include "pkt-line.h"
	5	#include "sideband.h"
	6	#include "run-command.h"
	7	#include "remote.h"
47a59185	8	#include "connect.h"
f5d942e1 NTND	9	#include "send-pack.h"
	10	#include "quote.h"
	11	#include "transport.h"
	12	#include "version.h"
13eb4626	13	#include "sha1-array.h"
a85b377d	14	#include "gpg-interface.h"
f5d942e1 NTND	15
	16	static int feed_object(const unsigned char *sha1, int fd, int negative)
	17	{
	18	char buf[42];
	19
	20	if (negative && !has_sha1_file(sha1))
	21	return 1;
	22
	23	memcpy(buf + negative, sha1_to_hex(sha1), 40);
	24	if (negative)
	25	buf[0] = '^';
	26	buf[40 + negative] = '\n';
	27	return write_or_whine(fd, buf, 41 + negative, "send-pack: send refs");
	28	}
	29
	30	/*
	31	* Make a pack stream and spit it out into file descriptor fd
	32	*/
13eb4626	33	static int pack_objects(int fd, struct ref refs, struct sha1_array extra, struct send_pack_args *args)
f5d942e1 NTND	34	{
	35	/*
	36	* The child becomes pack-objects --revs; we feed
	37	* the revision parameters to it via its stdin and
	38	* let its stdout go back to the other end.
	39	*/
	40	const char *argv[] = {
	41	"pack-objects",
	42	"--all-progress-implied",
	43	"--revs",
	44	"--stdout",
	45	NULL,
	46	NULL,
	47	NULL,
	48	NULL,
	49	NULL,
	50	};
	51	struct child_process po;
	52	int i;
	53
	54	i = 4;
	55	if (args->use_thin_pack)
	56	argv[i++] = "--thin";
	57	if (args->use_ofs_delta)
	58	argv[i++] = "--delta-base-offset";
	59	if (args->quiet \|\| !args->progress)
	60	argv[i++] = "-q";
	61	if (args->progress)
	62	argv[i++] = "--progress";
	63	memset(&po, 0, sizeof(po));
	64	po.argv = argv;
	65	po.in = -1;
	66	po.out = args->stateless_rpc ? -1 : fd;
	67	po.git_cmd = 1;
	68	if (start_command(&po))
	69	die_errno("git pack-objects failed");
	70
	71	/*
	72	* We feed the pack-objects we just spawned with revision
	73	* parameters by writing to the pipe.
	74	*/
	75	for (i = 0; i < extra->nr; i++)
13eb4626	76	if (!feed_object(extra->sha1[i], po.in, 1))
f5d942e1 NTND	77	break;
	78
	79	while (refs) {
	80	if (!is_null_sha1(refs->old_sha1) &&
	81	!feed_object(refs->old_sha1, po.in, 1))
	82	break;
	83	if (!is_null_sha1(refs->new_sha1) &&
	84	!feed_object(refs->new_sha1, po.in, 0))
	85	break;
	86	refs = refs->next;
	87	}
	88
	89	close(po.in);
	90
	91	if (args->stateless_rpc) {
	92	char *buf = xmalloc(LARGE_PACKET_MAX);
	93	while (1) {
	94	ssize_t n = xread(po.out, buf, LARGE_PACKET_MAX);
	95	if (n <= 0)
	96	break;
	97	send_sideband(fd, -1, buf, n, LARGE_PACKET_MAX);
	98	}
	99	free(buf);
	100	close(po.out);
	101	po.out = -1;
	102	}
	103
	104	if (finish_command(&po))
	105	return -1;
	106	return 0;
	107	}
	108
	109	static int receive_status(int in, struct ref *refs)
	110	{
	111	struct ref *hint;
f5d942e1	112	int ret = 0;
74543a04	113	char *line = packet_read_line(in, NULL);
59556548	114	if (!starts_with(line, "unpack "))
f5d942e1	115	return error("did not receive remote status");
819b929d	116	if (strcmp(line, "unpack ok")) {
f5d942e1 NTND	117	error("unpack failed: %s", line + 7);
	118	ret = -1;
	119	}
	120	hint = NULL;
	121	while (1) {
	122	char *refname;
	123	char *msg;
74543a04 JK	124	line = packet_read_line(in, NULL);
74543a04 JK	125	if (!line)
f5d942e1	126	break;
59556548	127	if (!starts_with(line, "ok ") && !starts_with(line, "ng ")) {
8f9e3e49	128	error("invalid ref status from remote: %s", line);
f5d942e1 NTND	129	ret = -1;
	130	break;
	131	}
	132
f5d942e1 NTND	133	refname = line + 3;
	134	msg = strchr(refname, ' ');
	135	if (msg)
	136	*msg++ = '\0';
	137
	138	/* first try searching at our hint, falling back to all refs */
	139	if (hint)
	140	hint = find_ref_by_name(hint, refname);
	141	if (!hint)
	142	hint = find_ref_by_name(refs, refname);
	143	if (!hint) {
	144	warning("remote reported status on unknown ref: %s",
	145	refname);
	146	continue;
	147	}
	148	if (hint->status != REF_STATUS_EXPECTING_REPORT) {
	149	warning("remote reported status on unexpected ref: %s",
	150	refname);
	151	continue;
	152	}
	153
	154	if (line[0] == 'o' && line[1] == 'k')
	155	hint->status = REF_STATUS_OK;
	156	else {
	157	hint->status = REF_STATUS_REMOTE_REJECT;
	158	ret = -1;
	159	}
	160	if (msg)
	161	hint->remote_status = xstrdup(msg);
	162	/* start our next search from the next ref */
	163	hint = hint->next;
	164	}
	165	return ret;
	166	}
	167
	168	static int sideband_demux(int in, int out, void *data)
	169	{
	170	int *fd = data, ret;
	171	#ifdef NO_PTHREADS
	172	close(fd[1]);
	173	#endif
	174	ret = recv_sideband("send-pack", fd[0], out);
	175	close(out);
	176	return ret;
	177	}
	178
f2c681cf NTND	179	static int advertise_shallow_grafts_cb(const struct commit_graft graft, void cb)
	180	{
	181	struct strbuf *sb = cb;
	182	if (graft->nr_parent == -1)
	183	packet_buf_write(sb, "shallow %s\n", sha1_to_hex(graft->sha1));
	184	return 0;
	185	}
	186
16a2743c	187	static void advertise_shallow_grafts_buf(struct strbuf *sb)
f2c681cf NTND	188	{
	189	if (!is_repository_shallow())
	190	return;
	191	for_each_commit_graft(advertise_shallow_grafts_cb, sb);
	192	}
	193
e40671a3 JH	194	static int ref_update_to_be_sent(const struct ref ref, const struct send_pack_args args)
	195	{
	196	if (!ref->peer_ref && !args->send_mirror)
	197	return 0;
	198
	199	/* Check for statuses set by set_ref_status_for_push() */
	200	switch (ref->status) {
	201	case REF_STATUS_REJECT_NONFASTFORWARD:
	202	case REF_STATUS_REJECT_ALREADY_EXISTS:
	203	case REF_STATUS_REJECT_FETCH_FIRST:
	204	case REF_STATUS_REJECT_NEEDS_FORCE:
	205	case REF_STATUS_REJECT_STALE:
	206	case REF_STATUS_REJECT_NODELETE:
	207	case REF_STATUS_UPTODATE:
	208	return 0;
	209	default:
	210	return 1;
	211	}
	212	}
	213
a85b377d JH	214	/*
	215	* the beginning of the next line, or the end of buffer.
	216	*
	217	* NEEDSWORK: perhaps move this to git-compat-util.h or somewhere and
	218	* convert many similar uses found by "git grep -A4 memchr".
	219	*/
	220	static const char next_line(const char line, size_t len)
	221	{
	222	const char *nl = memchr(line, '\n', len);
	223	if (!nl)
	224	return line + len; /* incomplete line */
	225	return nl + 1;
	226	}
	227
20a7558f JH	228	static int generate_push_cert(struct strbuf *req_buf,
	229	const struct ref *remote_refs,
	230	struct send_pack_args *args,
	231	const char *cap_string)
a85b377d JH	232	{
	233	const struct ref *ref;
	234	char stamp[60];
	235	char *signing_key = xstrdup(get_signing_key());
	236	const char cp, np;
	237	struct strbuf cert = STRBUF_INIT;
	238	int update_seen = 0;
	239
	240	datestamp(stamp, sizeof(stamp));
	241	strbuf_addf(&cert, "certificate version 0.1\n");
	242	strbuf_addf(&cert, "pusher %s %s\n", signing_key, stamp);
	243	strbuf_addstr(&cert, "\n");
	244
	245	for (ref = remote_refs; ref; ref = ref->next) {
	246	if (!ref_update_to_be_sent(ref, args))
	247	continue;
	248	update_seen = 1;
	249	strbuf_addf(&cert, "%s %s %s\n",
	250	sha1_to_hex(ref->old_sha1),
	251	sha1_to_hex(ref->new_sha1),
	252	ref->name);
	253	}
	254	if (!update_seen)
	255	goto free_return;
	256
	257	if (sign_buffer(&cert, &cert, signing_key))
	258	die(_("failed to sign the push certificate"));
	259
20a7558f	260	packet_buf_write(req_buf, "push-cert%c%s", 0, cap_string);
a85b377d JH	261	for (cp = cert.buf; cp < cert.buf + cert.len; cp = np) {
	262	np = next_line(cp, cert.buf + cert.len - cp);
	263	packet_buf_write(req_buf,
	264	"%.*s", (int)(np - cp), cp);
	265	}
	266	packet_buf_write(req_buf, "push-cert-end\n");
	267
	268	free_return:
	269	free(signing_key);
	270	strbuf_release(&cert);
20a7558f	271	return update_seen;
a85b377d JH	272	}
a85b377d JH	273
f5d942e1 NTND	274	int send_pack(struct send_pack_args *args,
	275	int fd[], struct child_process *conn,
	276	struct ref *remote_refs,
13eb4626	277	struct sha1_array *extra_have)
f5d942e1 NTND	278	{
	279	int in = fd[0];
	280	int out = fd[1];
	281	struct strbuf req_buf = STRBUF_INIT;
887f3533	282	struct strbuf cap_buf = STRBUF_INIT;
f5d942e1	283	struct ref *ref;
ab2b0c90	284	int need_pack_data = 0;
f5d942e1 NTND	285	int allow_deleting_refs = 0;
	286	int status_report = 0;
	287	int use_sideband = 0;
	288	int quiet_supported = 0;
	289	int agent_supported = 0;
	290	unsigned cmds_sent = 0;
	291	int ret;
	292	struct async demux;
	293
	294	/* Does the other end support the reporting? */
	295	if (server_supports("report-status"))
	296	status_report = 1;
	297	if (server_supports("delete-refs"))
	298	allow_deleting_refs = 1;
	299	if (server_supports("ofs-delta"))
	300	args->use_ofs_delta = 1;
	301	if (server_supports("side-band-64k"))
	302	use_sideband = 1;
	303	if (server_supports("quiet"))
	304	quiet_supported = 1;
	305	if (server_supports("agent"))
	306	agent_supported = 1;
1ba98a79 CMN	307	if (server_supports("no-thin"))
1ba98a79 CMN	308	args->use_thin_pack = 0;
a85b377d JH	309	if (args->push_cert && !server_supports("push-cert"))
a85b377d JH	310	die(_("the receiving end does not support --signed push"));
f5d942e1 NTND	311
	312	if (!remote_refs) {
	313	fprintf(stderr, "No refs in common and none specified; doing nothing.\n"
	314	"Perhaps you should specify a branch such as 'master'.\n");
	315	return 0;
	316	}
	317
887f3533 JH	318	if (status_report)
	319	strbuf_addstr(&cap_buf, " report-status");
	320	if (use_sideband)
	321	strbuf_addstr(&cap_buf, " side-band-64k");
	322	if (quiet_supported && (args->quiet \|\| !args->progress))
	323	strbuf_addstr(&cap_buf, " quiet");
	324	if (agent_supported)
	325	strbuf_addf(&cap_buf, " agent=%s", git_user_agent_sanitized());
	326
621b0599 JH	327	/*
	328	* NEEDSWORK: why does delete-refs have to be so specific to
	329	* send-pack machinery that set_ref_status_for_push() cannot
	330	* set this bit for us???
	331	*/
	332	for (ref = remote_refs; ref; ref = ref->next)
	333	if (ref->deletion && !allow_deleting_refs)
	334	ref->status = REF_STATUS_REJECT_NODELETE;
	335
5dbd7676	336	if (!args->dry_run)
f2c681cf	337	advertise_shallow_grafts_buf(&req_buf);
5dbd7676	338
a85b377d	339	if (!args->dry_run && args->push_cert)
20a7558f JH	340	cmds_sent = generate_push_cert(&req_buf, remote_refs, args,
20a7558f JH	341	cap_buf.buf);
a85b377d	342
f5d942e1	343	/*
b783aa71 JH	344	* Clear the status for each ref and see if we need to send
b783aa71 JH	345	* the pack data.
f5d942e1	346	*/
f5d942e1	347	for (ref = remote_refs; ref; ref = ref->next) {
e40671a3	348	if (!ref_update_to_be_sent(ref, args))
f5d942e1 NTND	349	continue;
f5d942e1 NTND	350
f5d942e1	351	if (!ref->deletion)
ab2b0c90	352	need_pack_data = 1;
f5d942e1	353
b783aa71	354	if (args->dry_run \|\| !status_report)
f5d942e1	355	ref->status = REF_STATUS_OK;
b783aa71 JH	356	else
	357	ref->status = REF_STATUS_EXPECTING_REPORT;
	358	}
	359
	360	/*
	361	* Finally, tell the other end!
	362	*/
	363	for (ref = remote_refs; ref; ref = ref->next) {
	364	char old_hex, new_hex;
	365
4adf569d	366	if (args->dry_run \|\| args->push_cert)
b783aa71 JH	367	continue;
	368
	369	if (!ref_update_to_be_sent(ref, args))
	370	continue;
	371
	372	old_hex = sha1_to_hex(ref->old_sha1);
	373	new_hex = sha1_to_hex(ref->new_sha1);
c67072b9	374	if (!cmds_sent) {
b783aa71 JH	375	packet_buf_write(&req_buf,
	376	"%s %s %s%c%s",
	377	old_hex, new_hex, ref->name, 0,
	378	cap_buf.buf);
c67072b9 JH	379	cmds_sent = 1;
c67072b9 JH	380	} else {
b783aa71 JH	381	packet_buf_write(&req_buf, "%s %s %s",
b783aa71 JH	382	old_hex, new_hex, ref->name);
c67072b9	383	}
f5d942e1 NTND	384	}
	385
	386	if (args->stateless_rpc) {
f2c681cf	387	if (!args->dry_run && (cmds_sent \|\| is_repository_shallow())) {
f5d942e1 NTND	388	packet_buf_flush(&req_buf);
	389	send_sideband(out, -1, req_buf.buf, req_buf.len, LARGE_PACKET_MAX);
	390	}
	391	} else {
cdf4fb8e	392	write_or_die(out, req_buf.buf, req_buf.len);
f5d942e1 NTND	393	packet_flush(out);
	394	}
	395	strbuf_release(&req_buf);
887f3533	396	strbuf_release(&cap_buf);
f5d942e1 NTND	397
	398	if (use_sideband && cmds_sent) {
	399	memset(&demux, 0, sizeof(demux));
	400	demux.proc = sideband_demux;
	401	demux.data = fd;
	402	demux.out = -1;
	403	if (start_async(&demux))
	404	die("send-pack: unable to fork off sideband demultiplexer");
	405	in = demux.out;
	406	}
	407
ab2b0c90	408	if (need_pack_data && cmds_sent) {
f5d942e1 NTND	409	if (pack_objects(out, remote_refs, extra_have, args) < 0) {
	410	for (ref = remote_refs; ref; ref = ref->next)
	411	ref->status = REF_STATUS_NONE;
	412	if (args->stateless_rpc)
	413	close(out);
	414	if (git_connection_is_socket(conn))
	415	shutdown(fd[0], SHUT_WR);
	416	if (use_sideband)
	417	finish_async(&demux);
37cb1dd6	418	fd[1] = -1;
f5d942e1 NTND	419	return -1;
f5d942e1 NTND	420	}
37cb1dd6 JL	421	if (!args->stateless_rpc)
	422	/* Closed by pack_objects() via start_command() */
	423	fd[1] = -1;
f5d942e1 NTND	424	}
	425	if (args->stateless_rpc && cmds_sent)
	426	packet_flush(out);
	427
	428	if (status_report && cmds_sent)
	429	ret = receive_status(in, remote_refs);
	430	else
	431	ret = 0;
	432	if (args->stateless_rpc)
	433	packet_flush(out);
	434
	435	if (use_sideband && cmds_sent) {
	436	if (finish_async(&demux)) {
	437	error("error in sideband demultiplexer");
	438	ret = -1;
	439	}
	440	close(demux.out);
	441	}
	442
	443	if (ret < 0)
	444	return ret;
	445
	446	if (args->porcelain)
	447	return 0;
	448
	449	for (ref = remote_refs; ref; ref = ref->next) {
	450	switch (ref->status) {
	451	case REF_STATUS_NONE:
	452	case REF_STATUS_UPTODATE:
	453	case REF_STATUS_OK:
	454	break;
	455	default:
	456	return -1;
	457	}
	458	}
	459	return 0;
	460	}