[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"

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);
}

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 ref *ref;
	int new_refs;
	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 (!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 (!args->dry_run)
		advertise_shallow_grafts_buf(&req_buf);

	/*
	 * Finally, tell the other end!
	 */
	new_refs = 0;
	for (ref = remote_refs; ref; ref = ref->next) {
		if (!ref->peer_ref && !args->send_mirror)
			continue;

		/* 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_UPTODATE:
			continue;
		default:
			; /* do nothing */
		}

		if (ref->deletion && !allow_deleting_refs) {
			ref->status = REF_STATUS_REJECT_NODELETE;
			continue;
		}

		if (!ref->deletion)
			new_refs++;

		if (args->dry_run) {
			ref->status = REF_STATUS_OK;
		} else {
			char *old_hex = sha1_to_hex(ref->old_sha1);
			char *new_hex = sha1_to_hex(ref->new_sha1);
			int quiet = quiet_supported && (args->quiet || !args->progress);

			if (!cmds_sent && (status_report || use_sideband ||
					   quiet || agent_supported)) {
				packet_buf_write(&req_buf,
						 "%s %s %s%c%s%s%s%s%s",
						 old_hex, new_hex, ref->name, 0,
						 status_report ? " report-status" : "",
						 use_sideband ? " side-band-64k" : "",
						 quiet ? " quiet" : "",
						 agent_supported ? " agent=" : "",
						 agent_supported ? git_user_agent_sanitized() : ""
						);
			}
			else
				packet_buf_write(&req_buf, "%s %s %s",
						 old_hex, new_hex, ref->name);
			ref->status = status_report ?
				REF_STATUS_EXPECTING_REPORT :
				REF_STATUS_OK;
			cmds_sent++;
		}
	}

	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);

	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 (new_refs && 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"
f5d942e1 NTND	14
	15	static int feed_object(const unsigned char *sha1, int fd, int negative)
	16	{
	17	char buf[42];
	18
	19	if (negative && !has_sha1_file(sha1))
	20	return 1;
	21
	22	memcpy(buf + negative, sha1_to_hex(sha1), 40);
	23	if (negative)
	24	buf[0] = '^';
	25	buf[40 + negative] = '\n';
	26	return write_or_whine(fd, buf, 41 + negative, "send-pack: send refs");
	27	}
	28
	29	/*
	30	* Make a pack stream and spit it out into file descriptor fd
	31	*/
13eb4626	32	static int pack_objects(int fd, struct ref refs, struct sha1_array extra, struct send_pack_args *args)
f5d942e1 NTND	33	{
	34	/*
	35	* The child becomes pack-objects --revs; we feed
	36	* the revision parameters to it via its stdin and
	37	* let its stdout go back to the other end.
	38	*/
	39	const char *argv[] = {
	40	"pack-objects",
	41	"--all-progress-implied",
	42	"--revs",
	43	"--stdout",
	44	NULL,
	45	NULL,
	46	NULL,
	47	NULL,
	48	NULL,
	49	};
	50	struct child_process po;
	51	int i;
	52
	53	i = 4;
	54	if (args->use_thin_pack)
	55	argv[i++] = "--thin";
	56	if (args->use_ofs_delta)
	57	argv[i++] = "--delta-base-offset";
	58	if (args->quiet \|\| !args->progress)
	59	argv[i++] = "-q";
	60	if (args->progress)
	61	argv[i++] = "--progress";
	62	memset(&po, 0, sizeof(po));
	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
f5d942e1 NTND	193	int send_pack(struct send_pack_args *args,
	194	int fd[], struct child_process *conn,
	195	struct ref *remote_refs,
13eb4626	196	struct sha1_array *extra_have)
f5d942e1 NTND	197	{
	198	int in = fd[0];
	199	int out = fd[1];
	200	struct strbuf req_buf = STRBUF_INIT;
	201	struct ref *ref;
	202	int new_refs;
	203	int allow_deleting_refs = 0;
	204	int status_report = 0;
	205	int use_sideband = 0;
	206	int quiet_supported = 0;
	207	int agent_supported = 0;
	208	unsigned cmds_sent = 0;
	209	int ret;
	210	struct async demux;
	211
	212	/* Does the other end support the reporting? */
	213	if (server_supports("report-status"))
	214	status_report = 1;
	215	if (server_supports("delete-refs"))
	216	allow_deleting_refs = 1;
	217	if (server_supports("ofs-delta"))
	218	args->use_ofs_delta = 1;
	219	if (server_supports("side-band-64k"))
	220	use_sideband = 1;
	221	if (server_supports("quiet"))
	222	quiet_supported = 1;
	223	if (server_supports("agent"))
	224	agent_supported = 1;
1ba98a79 CMN	225	if (server_supports("no-thin"))
1ba98a79 CMN	226	args->use_thin_pack = 0;
f5d942e1 NTND	227
	228	if (!remote_refs) {
	229	fprintf(stderr, "No refs in common and none specified; doing nothing.\n"
	230	"Perhaps you should specify a branch such as 'master'.\n");
	231	return 0;
	232	}
	233
5dbd7676	234	if (!args->dry_run)
f2c681cf	235	advertise_shallow_grafts_buf(&req_buf);
5dbd7676	236
f5d942e1 NTND	237	/*
	238	* Finally, tell the other end!
	239	*/
	240	new_refs = 0;
	241	for (ref = remote_refs; ref; ref = ref->next) {
	242	if (!ref->peer_ref && !args->send_mirror)
	243	continue;
	244
	245	/* Check for statuses set by set_ref_status_for_push() */
	246	switch (ref->status) {
	247	case REF_STATUS_REJECT_NONFASTFORWARD:
dbfeddb1	248	case REF_STATUS_REJECT_ALREADY_EXISTS:
75e5c0dc JH	249	case REF_STATUS_REJECT_FETCH_FIRST:
75e5c0dc JH	250	case REF_STATUS_REJECT_NEEDS_FORCE:
631b5ef2	251	case REF_STATUS_REJECT_STALE:
f5d942e1 NTND	252	case REF_STATUS_UPTODATE:
	253	continue;
	254	default:
	255	; /* do nothing */
	256	}
	257
	258	if (ref->deletion && !allow_deleting_refs) {
	259	ref->status = REF_STATUS_REJECT_NODELETE;
	260	continue;
	261	}
	262
	263	if (!ref->deletion)
	264	new_refs++;
	265
	266	if (args->dry_run) {
	267	ref->status = REF_STATUS_OK;
	268	} else {
	269	char *old_hex = sha1_to_hex(ref->old_sha1);
	270	char *new_hex = sha1_to_hex(ref->new_sha1);
	271	int quiet = quiet_supported && (args->quiet \|\| !args->progress);
	272
	273	if (!cmds_sent && (status_report \|\| use_sideband \|\|
	274	quiet \|\| agent_supported)) {
	275	packet_buf_write(&req_buf,
	276	"%s %s %s%c%s%s%s%s%s",
	277	old_hex, new_hex, ref->name, 0,
	278	status_report ? " report-status" : "",
	279	use_sideband ? " side-band-64k" : "",
	280	quiet ? " quiet" : "",
	281	agent_supported ? " agent=" : "",
	282	agent_supported ? git_user_agent_sanitized() : ""
	283	);
	284	}
	285	else
	286	packet_buf_write(&req_buf, "%s %s %s",
	287	old_hex, new_hex, ref->name);
	288	ref->status = status_report ?
	289	REF_STATUS_EXPECTING_REPORT :
	290	REF_STATUS_OK;
	291	cmds_sent++;
	292	}
	293	}
	294
	295	if (args->stateless_rpc) {
f2c681cf	296	if (!args->dry_run && (cmds_sent \|\| is_repository_shallow())) {
f5d942e1 NTND	297	packet_buf_flush(&req_buf);
	298	send_sideband(out, -1, req_buf.buf, req_buf.len, LARGE_PACKET_MAX);
	299	}
	300	} else {
cdf4fb8e	301	write_or_die(out, req_buf.buf, req_buf.len);
f5d942e1 NTND	302	packet_flush(out);
	303	}
	304	strbuf_release(&req_buf);
	305
	306	if (use_sideband && cmds_sent) {
	307	memset(&demux, 0, sizeof(demux));
	308	demux.proc = sideband_demux;
	309	demux.data = fd;
	310	demux.out = -1;
	311	if (start_async(&demux))
	312	die("send-pack: unable to fork off sideband demultiplexer");
	313	in = demux.out;
	314	}
	315
	316	if (new_refs && cmds_sent) {
	317	if (pack_objects(out, remote_refs, extra_have, args) < 0) {
	318	for (ref = remote_refs; ref; ref = ref->next)
	319	ref->status = REF_STATUS_NONE;
	320	if (args->stateless_rpc)
	321	close(out);
	322	if (git_connection_is_socket(conn))
	323	shutdown(fd[0], SHUT_WR);
	324	if (use_sideband)
	325	finish_async(&demux);
37cb1dd6	326	fd[1] = -1;
f5d942e1 NTND	327	return -1;
f5d942e1 NTND	328	}
37cb1dd6 JL	329	if (!args->stateless_rpc)
	330	/* Closed by pack_objects() via start_command() */
	331	fd[1] = -1;
f5d942e1 NTND	332	}
	333	if (args->stateless_rpc && cmds_sent)
	334	packet_flush(out);
	335
	336	if (status_report && cmds_sent)
	337	ret = receive_status(in, remote_refs);
	338	else
	339	ret = 0;
	340	if (args->stateless_rpc)
	341	packet_flush(out);
	342
	343	if (use_sideband && cmds_sent) {
	344	if (finish_async(&demux)) {
	345	error("error in sideband demultiplexer");
	346	ret = -1;
	347	}
	348	close(demux.out);
	349	}
	350
	351	if (ret < 0)
	352	return ret;
	353
	354	if (args->porcelain)
	355	return 0;
	356
	357	for (ref = remote_refs; ref; ref = ref->next) {
	358	switch (ref->status) {
	359	case REF_STATUS_NONE:
	360	case REF_STATUS_UPTODATE:
	361	case REF_STATUS_OK:
	362	break;
	363	default:
	364	return -1;
	365	}
	366	}
	367	return 0;
	368	}