[thirdparty/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 = CHILD_PROCESS_INIT;
	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";
	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);
}

#define CHECK_REF_NO_PUSH -1
#define CHECK_REF_STATUS_REJECTED -2
#define CHECK_REF_UPTODATE -3
static int check_to_send_update(const struct ref *ref, const struct send_pack_args *args)
{
	if (!ref->peer_ref && !args->send_mirror)
		return CHECK_REF_NO_PUSH;

	/* 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:
		return CHECK_REF_STATUS_REJECTED;
	case REF_STATUS_UPTODATE:
		return CHECK_REF_UPTODATE;
	default:
		return 0;
	}
}

/*
 * 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 char *push_cert_nonce)
{
	const struct ref *ref;
	char *signing_key = xstrdup(get_signing_key());
	const char *cp, *np;
	struct strbuf cert = STRBUF_INIT;
	int update_seen = 0;

	strbuf_addf(&cert, "certificate version 0.1\n");
	strbuf_addf(&cert, "pusher %s ", signing_key);
	datestamp(&cert);
	strbuf_addch(&cert, '\n');
	if (args->url && *args->url) {
		char *anon_url = transport_anonymize_url(args->url);
		strbuf_addf(&cert, "pushee %s\n", anon_url);
		free(anon_url);
	}
	if (push_cert_nonce[0])
		strbuf_addf(&cert, "nonce %s\n", push_cert_nonce);
	strbuf_addstr(&cert, "\n");

	for (ref = remote_refs; ref; ref = ref->next) {
		if (check_to_send_update(ref, args) < 0)
			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;
	const char *push_cert_nonce = NULL;

	/* 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) {
		int len;

		push_cert_nonce = server_feature_value("push-cert", &len);
		if (!push_cert_nonce)
			die(_("the receiving end does not support --signed push"));
		push_cert_nonce = xmemdupz(push_cert_nonce, len);
	}

	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, push_cert_nonce);

	/*
	 * 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 (check_to_send_update(ref, args) < 0)
			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 (check_to_send_update(ref, args) < 0)
			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	};
d3180279	51	struct child_process po = CHILD_PROCESS_INIT;
f5d942e1 NTND	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";
f5d942e1 NTND	63	po.argv = argv;
	64	po.in = -1;
	65	po.out = args->stateless_rpc ? -1 : fd;
	66	po.git_cmd = 1;
	67	if (start_command(&po))
	68	die_errno("git pack-objects failed");
	69
	70	/*
	71	* We feed the pack-objects we just spawned with revision
	72	* parameters by writing to the pipe.
	73	*/
	74	for (i = 0; i < extra->nr; i++)
13eb4626	75	if (!feed_object(extra->sha1[i], po.in, 1))
f5d942e1 NTND	76	break;
	77
	78	while (refs) {
	79	if (!is_null_sha1(refs->old_sha1) &&
	80	!feed_object(refs->old_sha1, po.in, 1))
	81	break;
	82	if (!is_null_sha1(refs->new_sha1) &&
	83	!feed_object(refs->new_sha1, po.in, 0))
	84	break;
	85	refs = refs->next;
	86	}
	87
	88	close(po.in);
	89
	90	if (args->stateless_rpc) {
	91	char *buf = xmalloc(LARGE_PACKET_MAX);
	92	while (1) {
	93	ssize_t n = xread(po.out, buf, LARGE_PACKET_MAX);
	94	if (n <= 0)
	95	break;
	96	send_sideband(fd, -1, buf, n, LARGE_PACKET_MAX);
	97	}
	98	free(buf);
	99	close(po.out);
	100	po.out = -1;
	101	}
	102
	103	if (finish_command(&po))
	104	return -1;
	105	return 0;
	106	}
	107
	108	static int receive_status(int in, struct ref *refs)
	109	{
	110	struct ref *hint;
f5d942e1	111	int ret = 0;
74543a04	112	char *line = packet_read_line(in, NULL);
59556548	113	if (!starts_with(line, "unpack "))
f5d942e1	114	return error("did not receive remote status");
819b929d	115	if (strcmp(line, "unpack ok")) {
f5d942e1 NTND	116	error("unpack failed: %s", line + 7);
	117	ret = -1;
	118	}
	119	hint = NULL;
	120	while (1) {
	121	char *refname;
	122	char *msg;
74543a04 JK	123	line = packet_read_line(in, NULL);
74543a04 JK	124	if (!line)
f5d942e1	125	break;
59556548	126	if (!starts_with(line, "ok ") && !starts_with(line, "ng ")) {
8f9e3e49	127	error("invalid ref status from remote: %s", line);
f5d942e1 NTND	128	ret = -1;
	129	break;
	130	}
	131
f5d942e1 NTND	132	refname = line + 3;
	133	msg = strchr(refname, ' ');
	134	if (msg)
	135	*msg++ = '\0';
	136
	137	/* first try searching at our hint, falling back to all refs */
	138	if (hint)
	139	hint = find_ref_by_name(hint, refname);
	140	if (!hint)
	141	hint = find_ref_by_name(refs, refname);
	142	if (!hint) {
	143	warning("remote reported status on unknown ref: %s",
	144	refname);
	145	continue;
	146	}
	147	if (hint->status != REF_STATUS_EXPECTING_REPORT) {
	148	warning("remote reported status on unexpected ref: %s",
	149	refname);
	150	continue;
	151	}
	152
	153	if (line[0] == 'o' && line[1] == 'k')
	154	hint->status = REF_STATUS_OK;
	155	else {
	156	hint->status = REF_STATUS_REMOTE_REJECT;
	157	ret = -1;
	158	}
	159	if (msg)
	160	hint->remote_status = xstrdup(msg);
	161	/* start our next search from the next ref */
	162	hint = hint->next;
	163	}
	164	return ret;
	165	}
	166
	167	static int sideband_demux(int in, int out, void *data)
	168	{
	169	int *fd = data, ret;
	170	#ifdef NO_PTHREADS
	171	close(fd[1]);
	172	#endif
	173	ret = recv_sideband("send-pack", fd[0], out);
	174	close(out);
	175	return ret;
	176	}
	177
f2c681cf NTND	178	static int advertise_shallow_grafts_cb(const struct commit_graft graft, void cb)
	179	{
	180	struct strbuf *sb = cb;
	181	if (graft->nr_parent == -1)
	182	packet_buf_write(sb, "shallow %s\n", sha1_to_hex(graft->sha1));
	183	return 0;
	184	}
	185
16a2743c	186	static void advertise_shallow_grafts_buf(struct strbuf *sb)
f2c681cf NTND	187	{
	188	if (!is_repository_shallow())
	189	return;
	190	for_each_commit_graft(advertise_shallow_grafts_cb, sb);
	191	}
	192
7582e939 SB	193	#define CHECK_REF_NO_PUSH -1
	194	#define CHECK_REF_STATUS_REJECTED -2
	195	#define CHECK_REF_UPTODATE -3
	196	static int check_to_send_update(const struct ref ref, const struct send_pack_args args)
e40671a3 JH	197	{
e40671a3 JH	198	if (!ref->peer_ref && !args->send_mirror)
7582e939	199	return CHECK_REF_NO_PUSH;
e40671a3 JH	200
	201	/* Check for statuses set by set_ref_status_for_push() */
	202	switch (ref->status) {
	203	case REF_STATUS_REJECT_NONFASTFORWARD:
	204	case REF_STATUS_REJECT_ALREADY_EXISTS:
	205	case REF_STATUS_REJECT_FETCH_FIRST:
	206	case REF_STATUS_REJECT_NEEDS_FORCE:
	207	case REF_STATUS_REJECT_STALE:
	208	case REF_STATUS_REJECT_NODELETE:
7582e939	209	return CHECK_REF_STATUS_REJECTED;
e40671a3	210	case REF_STATUS_UPTODATE:
7582e939	211	return CHECK_REF_UPTODATE;
e40671a3	212	default:
7582e939	213	return 0;
e40671a3 JH	214	}
	215	}
	216
a85b377d JH	217	/*
	218	* the beginning of the next line, or the end of buffer.
	219	*
	220	* NEEDSWORK: perhaps move this to git-compat-util.h or somewhere and
	221	* convert many similar uses found by "git grep -A4 memchr".
	222	*/
	223	static const char next_line(const char line, size_t len)
	224	{
	225	const char *nl = memchr(line, '\n', len);
	226	if (!nl)
	227	return line + len; /* incomplete line */
	228	return nl + 1;
	229	}
	230
20a7558f JH	231	static int generate_push_cert(struct strbuf *req_buf,
	232	const struct ref *remote_refs,
	233	struct send_pack_args *args,
b89363e4 JH	234	const char *cap_string,
b89363e4 JH	235	const char *push_cert_nonce)
a85b377d JH	236	{
a85b377d JH	237	const struct ref *ref;
a85b377d JH	238	char *signing_key = xstrdup(get_signing_key());
	239	const char cp, np;
	240	struct strbuf cert = STRBUF_INIT;
	241	int update_seen = 0;
	242
a85b377d	243	strbuf_addf(&cert, "certificate version 0.1\n");
fb06b528 JH	244	strbuf_addf(&cert, "pusher %s ", signing_key);
	245	datestamp(&cert);
	246	strbuf_addch(&cert, '\n');
9be89160 JH	247	if (args->url && *args->url) {
	248	char *anon_url = transport_anonymize_url(args->url);
	249	strbuf_addf(&cert, "pushee %s\n", anon_url);
	250	free(anon_url);
	251	}
b89363e4 JH	252	if (push_cert_nonce[0])
b89363e4 JH	253	strbuf_addf(&cert, "nonce %s\n", push_cert_nonce);
a85b377d JH	254	strbuf_addstr(&cert, "\n");
	255
	256	for (ref = remote_refs; ref; ref = ref->next) {
7582e939	257	if (check_to_send_update(ref, args) < 0)
a85b377d JH	258	continue;
	259	update_seen = 1;
	260	strbuf_addf(&cert, "%s %s %s\n",
	261	sha1_to_hex(ref->old_sha1),
	262	sha1_to_hex(ref->new_sha1),
	263	ref->name);
	264	}
	265	if (!update_seen)
	266	goto free_return;
	267
	268	if (sign_buffer(&cert, &cert, signing_key))
	269	die(_("failed to sign the push certificate"));
	270
20a7558f	271	packet_buf_write(req_buf, "push-cert%c%s", 0, cap_string);
a85b377d JH	272	for (cp = cert.buf; cp < cert.buf + cert.len; cp = np) {
	273	np = next_line(cp, cert.buf + cert.len - cp);
	274	packet_buf_write(req_buf,
	275	"%.*s", (int)(np - cp), cp);
	276	}
	277	packet_buf_write(req_buf, "push-cert-end\n");
	278
	279	free_return:
	280	free(signing_key);
	281	strbuf_release(&cert);
20a7558f	282	return update_seen;
a85b377d JH	283	}
a85b377d JH	284
f5d942e1 NTND	285	int send_pack(struct send_pack_args *args,
	286	int fd[], struct child_process *conn,
	287	struct ref *remote_refs,
13eb4626	288	struct sha1_array *extra_have)
f5d942e1 NTND	289	{
	290	int in = fd[0];
	291	int out = fd[1];
	292	struct strbuf req_buf = STRBUF_INIT;
887f3533	293	struct strbuf cap_buf = STRBUF_INIT;
f5d942e1	294	struct ref *ref;
ab2b0c90	295	int need_pack_data = 0;
f5d942e1 NTND	296	int allow_deleting_refs = 0;
	297	int status_report = 0;
	298	int use_sideband = 0;
	299	int quiet_supported = 0;
	300	int agent_supported = 0;
	301	unsigned cmds_sent = 0;
	302	int ret;
	303	struct async demux;
b89363e4	304	const char *push_cert_nonce = NULL;
f5d942e1 NTND	305
	306	/* Does the other end support the reporting? */
	307	if (server_supports("report-status"))
	308	status_report = 1;
	309	if (server_supports("delete-refs"))
	310	allow_deleting_refs = 1;
	311	if (server_supports("ofs-delta"))
	312	args->use_ofs_delta = 1;
	313	if (server_supports("side-band-64k"))
	314	use_sideband = 1;
	315	if (server_supports("quiet"))
	316	quiet_supported = 1;
	317	if (server_supports("agent"))
	318	agent_supported = 1;
1ba98a79 CMN	319	if (server_supports("no-thin"))
1ba98a79 CMN	320	args->use_thin_pack = 0;
b89363e4 JH	321	if (args->push_cert) {
	322	int len;
	323
	324	push_cert_nonce = server_feature_value("push-cert", &len);
	325	if (!push_cert_nonce)
	326	die(_("the receiving end does not support --signed push"));
	327	push_cert_nonce = xmemdupz(push_cert_nonce, len);
	328	}
f5d942e1 NTND	329
	330	if (!remote_refs) {
	331	fprintf(stderr, "No refs in common and none specified; doing nothing.\n"
	332	"Perhaps you should specify a branch such as 'master'.\n");
	333	return 0;
	334	}
	335
887f3533 JH	336	if (status_report)
	337	strbuf_addstr(&cap_buf, " report-status");
	338	if (use_sideband)
	339	strbuf_addstr(&cap_buf, " side-band-64k");
	340	if (quiet_supported && (args->quiet \|\| !args->progress))
	341	strbuf_addstr(&cap_buf, " quiet");
	342	if (agent_supported)
	343	strbuf_addf(&cap_buf, " agent=%s", git_user_agent_sanitized());
	344
621b0599 JH	345	/*
	346	* NEEDSWORK: why does delete-refs have to be so specific to
	347	* send-pack machinery that set_ref_status_for_push() cannot
	348	* set this bit for us???
	349	*/
	350	for (ref = remote_refs; ref; ref = ref->next)
	351	if (ref->deletion && !allow_deleting_refs)
	352	ref->status = REF_STATUS_REJECT_NODELETE;
	353
5dbd7676	354	if (!args->dry_run)
f2c681cf	355	advertise_shallow_grafts_buf(&req_buf);
5dbd7676	356
a85b377d	357	if (!args->dry_run && args->push_cert)
20a7558f	358	cmds_sent = generate_push_cert(&req_buf, remote_refs, args,
b89363e4	359	cap_buf.buf, push_cert_nonce);
a85b377d	360
f5d942e1	361	/*
b783aa71 JH	362	* Clear the status for each ref and see if we need to send
b783aa71 JH	363	* the pack data.
f5d942e1	364	*/
f5d942e1	365	for (ref = remote_refs; ref; ref = ref->next) {
7582e939	366	if (check_to_send_update(ref, args) < 0)
f5d942e1 NTND	367	continue;
f5d942e1 NTND	368
f5d942e1	369	if (!ref->deletion)
ab2b0c90	370	need_pack_data = 1;
f5d942e1	371
b783aa71	372	if (args->dry_run \|\| !status_report)
f5d942e1	373	ref->status = REF_STATUS_OK;
b783aa71 JH	374	else
	375	ref->status = REF_STATUS_EXPECTING_REPORT;
	376	}
	377
	378	/*
	379	* Finally, tell the other end!
	380	*/
	381	for (ref = remote_refs; ref; ref = ref->next) {
	382	char old_hex, new_hex;
	383
4adf569d	384	if (args->dry_run \|\| args->push_cert)
f5d942e1	385	continue;
f5d942e1	386
7582e939	387	if (check_to_send_update(ref, args) < 0)
b783aa71	388	continue;
f5d942e1	389
b783aa71 JH	390	old_hex = sha1_to_hex(ref->old_sha1);
b783aa71 JH	391	new_hex = sha1_to_hex(ref->new_sha1);
c67072b9	392	if (!cmds_sent) {
b783aa71 JH	393	packet_buf_write(&req_buf,
	394	"%s %s %s%c%s",
	395	old_hex, new_hex, ref->name, 0,
	396	cap_buf.buf);
c67072b9	397	cmds_sent = 1;
f5d942e1	398	} else {
b783aa71 JH	399	packet_buf_write(&req_buf, "%s %s %s",
b783aa71 JH	400	old_hex, new_hex, ref->name);
f5d942e1 NTND	401	}
	402	}
	403
	404	if (args->stateless_rpc) {
f2c681cf	405	if (!args->dry_run && (cmds_sent \|\| is_repository_shallow())) {
f5d942e1 NTND	406	packet_buf_flush(&req_buf);
	407	send_sideband(out, -1, req_buf.buf, req_buf.len, LARGE_PACKET_MAX);
	408	}
	409	} else {
cdf4fb8e	410	write_or_die(out, req_buf.buf, req_buf.len);
f5d942e1 NTND	411	packet_flush(out);
	412	}
	413	strbuf_release(&req_buf);
887f3533	414	strbuf_release(&cap_buf);
f5d942e1 NTND	415
	416	if (use_sideband && cmds_sent) {
	417	memset(&demux, 0, sizeof(demux));
	418	demux.proc = sideband_demux;
	419	demux.data = fd;
	420	demux.out = -1;
	421	if (start_async(&demux))
	422	die("send-pack: unable to fork off sideband demultiplexer");
	423	in = demux.out;
	424	}
	425
ab2b0c90	426	if (need_pack_data && cmds_sent) {
f5d942e1 NTND	427	if (pack_objects(out, remote_refs, extra_have, args) < 0) {
	428	for (ref = remote_refs; ref; ref = ref->next)
	429	ref->status = REF_STATUS_NONE;
	430	if (args->stateless_rpc)
	431	close(out);
	432	if (git_connection_is_socket(conn))
	433	shutdown(fd[0], SHUT_WR);
	434	if (use_sideband)
	435	finish_async(&demux);
37cb1dd6	436	fd[1] = -1;
f5d942e1 NTND	437	return -1;
f5d942e1 NTND	438	}
37cb1dd6 JL	439	if (!args->stateless_rpc)
	440	/* Closed by pack_objects() via start_command() */
	441	fd[1] = -1;
f5d942e1 NTND	442	}
	443	if (args->stateless_rpc && cmds_sent)
	444	packet_flush(out);
	445
	446	if (status_report && cmds_sent)
	447	ret = receive_status(in, remote_refs);
	448	else
	449	ret = 0;
	450	if (args->stateless_rpc)
	451	packet_flush(out);
	452
	453	if (use_sideband && cmds_sent) {
	454	if (finish_async(&demux)) {
	455	error("error in sideband demultiplexer");
	456	ret = -1;
	457	}
	458	close(demux.out);
	459	}
	460
	461	if (ret < 0)
	462	return ret;
	463
	464	if (args->porcelain)
	465	return 0;
	466
	467	for (ref = remote_refs; ref; ref = ref->next) {
	468	switch (ref->status) {
	469	case REF_STATUS_NONE:
	470	case REF_STATUS_UPTODATE:
	471	case REF_STATUS_OK:
	472	break;
	473	default:
	474	return -1;
	475	}
	476	}
	477	return 0;
	478	}