[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 (prefixcmp(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 (prefixcmp(line, "ok ") && prefixcmp(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;
}

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 (!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(out);

	/*
	 * 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) {
			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);
8f9e3e49	113	if (prefixcmp(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;
8f9e3e49 JK	126	if (prefixcmp(line, "ok ") && prefixcmp(line, "ng ")) {
8f9e3e49 JK	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
	178	int send_pack(struct send_pack_args *args,
	179	int fd[], struct child_process *conn,
	180	struct ref *remote_refs,
13eb4626	181	struct sha1_array *extra_have)
f5d942e1 NTND	182	{
	183	int in = fd[0];
	184	int out = fd[1];
	185	struct strbuf req_buf = STRBUF_INIT;
	186	struct ref *ref;
	187	int new_refs;
	188	int allow_deleting_refs = 0;
	189	int status_report = 0;
	190	int use_sideband = 0;
	191	int quiet_supported = 0;
	192	int agent_supported = 0;
	193	unsigned cmds_sent = 0;
	194	int ret;
	195	struct async demux;
	196
	197	/* Does the other end support the reporting? */
	198	if (server_supports("report-status"))
	199	status_report = 1;
	200	if (server_supports("delete-refs"))
	201	allow_deleting_refs = 1;
	202	if (server_supports("ofs-delta"))
	203	args->use_ofs_delta = 1;
	204	if (server_supports("side-band-64k"))
	205	use_sideband = 1;
	206	if (server_supports("quiet"))
	207	quiet_supported = 1;
	208	if (server_supports("agent"))
	209	agent_supported = 1;
	210
	211	if (!remote_refs) {
	212	fprintf(stderr, "No refs in common and none specified; doing nothing.\n"
	213	"Perhaps you should specify a branch such as 'master'.\n");
	214	return 0;
	215	}
	216
5dbd7676 NTND	217	if (!args->dry_run)
	218	advertise_shallow_grafts(out);
	219
f5d942e1 NTND	220	/*
	221	* Finally, tell the other end!
	222	*/
	223	new_refs = 0;
	224	for (ref = remote_refs; ref; ref = ref->next) {
	225	if (!ref->peer_ref && !args->send_mirror)
	226	continue;
	227
	228	/* Check for statuses set by set_ref_status_for_push() */
	229	switch (ref->status) {
	230	case REF_STATUS_REJECT_NONFASTFORWARD:
dbfeddb1	231	case REF_STATUS_REJECT_ALREADY_EXISTS:
75e5c0dc JH	232	case REF_STATUS_REJECT_FETCH_FIRST:
75e5c0dc JH	233	case REF_STATUS_REJECT_NEEDS_FORCE:
631b5ef2	234	case REF_STATUS_REJECT_STALE:
f5d942e1 NTND	235	case REF_STATUS_UPTODATE:
	236	continue;
	237	default:
	238	; /* do nothing */
	239	}
	240
	241	if (ref->deletion && !allow_deleting_refs) {
	242	ref->status = REF_STATUS_REJECT_NODELETE;
	243	continue;
	244	}
	245
	246	if (!ref->deletion)
	247	new_refs++;
	248
	249	if (args->dry_run) {
	250	ref->status = REF_STATUS_OK;
	251	} else {
	252	char *old_hex = sha1_to_hex(ref->old_sha1);
	253	char *new_hex = sha1_to_hex(ref->new_sha1);
	254	int quiet = quiet_supported && (args->quiet \|\| !args->progress);
	255
	256	if (!cmds_sent && (status_report \|\| use_sideband \|\|
	257	quiet \|\| agent_supported)) {
	258	packet_buf_write(&req_buf,
	259	"%s %s %s%c%s%s%s%s%s",
	260	old_hex, new_hex, ref->name, 0,
	261	status_report ? " report-status" : "",
	262	use_sideband ? " side-band-64k" : "",
	263	quiet ? " quiet" : "",
	264	agent_supported ? " agent=" : "",
	265	agent_supported ? git_user_agent_sanitized() : ""
	266	);
	267	}
	268	else
	269	packet_buf_write(&req_buf, "%s %s %s",
	270	old_hex, new_hex, ref->name);
	271	ref->status = status_report ?
	272	REF_STATUS_EXPECTING_REPORT :
	273	REF_STATUS_OK;
	274	cmds_sent++;
	275	}
	276	}
	277
	278	if (args->stateless_rpc) {
	279	if (!args->dry_run && cmds_sent) {
	280	packet_buf_flush(&req_buf);
	281	send_sideband(out, -1, req_buf.buf, req_buf.len, LARGE_PACKET_MAX);
	282	}
	283	} else {
cdf4fb8e	284	write_or_die(out, req_buf.buf, req_buf.len);
f5d942e1 NTND	285	packet_flush(out);
	286	}
	287	strbuf_release(&req_buf);
	288
	289	if (use_sideband && cmds_sent) {
	290	memset(&demux, 0, sizeof(demux));
	291	demux.proc = sideband_demux;
	292	demux.data = fd;
	293	demux.out = -1;
	294	if (start_async(&demux))
	295	die("send-pack: unable to fork off sideband demultiplexer");
	296	in = demux.out;
	297	}
	298
	299	if (new_refs && cmds_sent) {
	300	if (pack_objects(out, remote_refs, extra_have, args) < 0) {
	301	for (ref = remote_refs; ref; ref = ref->next)
	302	ref->status = REF_STATUS_NONE;
	303	if (args->stateless_rpc)
	304	close(out);
	305	if (git_connection_is_socket(conn))
	306	shutdown(fd[0], SHUT_WR);
	307	if (use_sideband)
	308	finish_async(&demux);
37cb1dd6	309	fd[1] = -1;
f5d942e1 NTND	310	return -1;
f5d942e1 NTND	311	}
37cb1dd6 JL	312	if (!args->stateless_rpc)
	313	/* Closed by pack_objects() via start_command() */
	314	fd[1] = -1;
f5d942e1 NTND	315	}
	316	if (args->stateless_rpc && cmds_sent)
	317	packet_flush(out);
	318
	319	if (status_report && cmds_sent)
	320	ret = receive_status(in, remote_refs);
	321	else
	322	ret = 0;
	323	if (args->stateless_rpc)
	324	packet_flush(out);
	325
	326	if (use_sideband && cmds_sent) {
	327	if (finish_async(&demux)) {
	328	error("error in sideband demultiplexer");
	329	ret = -1;
	330	}
	331	close(demux.out);
	332	}
	333
	334	if (ret < 0)
	335	return ret;
	336
	337	if (args->porcelain)
	338	return 0;
	339
	340	for (ref = remote_refs; ref; ref = ref->next) {
	341	switch (ref->status) {
	342	case REF_STATUS_NONE:
	343	case REF_STATUS_UPTODATE:
	344	case REF_STATUS_OK:
	345	break;
	346	default:
	347	return -1;
	348	}
	349	}
	350	return 0;
	351	}