[thirdparty/git.git] / bundle.c

#include "cache.h"
#include "bundle.h"
#include "object.h"
#include "commit.h"
#include "diff.h"
#include "revision.h"
#include "list-objects.h"
#include "run-command.h"
#include "refs.h"

static const char bundle_signature[] = "# v2 git bundle\n";

static void add_to_ref_list(const unsigned char *sha1, const char *name,
		struct ref_list *list)
{
	if (list->nr + 1 >= list->alloc) {
		list->alloc = alloc_nr(list->nr + 1);
		list->list = xrealloc(list->list,
				list->alloc * sizeof(list->list[0]));
	}
	memcpy(list->list[list->nr].sha1, sha1, 20);
	list->list[list->nr].name = xstrdup(name);
	list->nr++;
}

/* Eventually this should go to strbuf.[ch] */
static int strbuf_readline_fd(struct strbuf *sb, int fd)
{
	strbuf_reset(sb);

	while (1) {
		char ch;
		ssize_t len = xread(fd, &ch, 1);
		if (len < 0)
			return -1;
		strbuf_addch(sb, ch);
		if (ch == '\n')
			break;
	}
	return 0;
}

int read_bundle_header(const char *path, struct bundle_header *header)
{
	struct strbuf buf = STRBUF_INIT;
	int fd = open(path, O_RDONLY);
	int status = 0;

	if (fd < 0)
		return error("could not open '%s'", path);

	/* The bundle header begins with the signature */
	if (strbuf_readline_fd(&buf, fd) ||
	    strcmp(buf.buf, bundle_signature)) {
		error("'%s' does not look like a v2 bundle file", path);
		status = -1;
		goto abort;
	}

	/* The bundle header ends with an empty line */
	while (!strbuf_readline_fd(&buf, fd) &&
	       buf.len && buf.buf[0] != '\n') {
		unsigned char sha1[20];
		int is_prereq = 0;

		if (*buf.buf == '-') {
			is_prereq = 1;
			strbuf_remove(&buf, 0, 1);
		}
		strbuf_rtrim(&buf);

		/*
		 * Tip lines have object name, SP, and refname.
		 * Prerequisites have object name that is optionally
		 * followed by SP and subject line.
		 */
		if (get_sha1_hex(buf.buf, sha1) ||
		    (40 <= buf.len && !isspace(buf.buf[40])) ||
		    (!is_prereq && buf.len <= 40)) {
			error("unrecognized header: %s%s (%d)",
			      (is_prereq ? "-" : ""), buf.buf, (int)buf.len);
			status = -1;
			break;
		} else {
			if (is_prereq)
				add_to_ref_list(sha1, "", &header->prerequisites);
			else
				add_to_ref_list(sha1, buf.buf + 41, &header->references);
		}
	}

 abort:
	if (status) {
		close(fd);
		fd = -1;
	}
	strbuf_release(&buf);
	return fd;
}

static int list_refs(struct ref_list *r, int argc, const char **argv)
{
	int i;

	for (i = 0; i < r->nr; i++) {
		if (argc > 1) {
			int j;
			for (j = 1; j < argc; j++)
				if (!strcmp(r->list[i].name, argv[j]))
					break;
			if (j == argc)
				continue;
		}
		printf("%s %s\n", sha1_to_hex(r->list[i].sha1),
				r->list[i].name);
	}
	return 0;
}

#define PREREQ_MARK (1u<<16)

int verify_bundle(struct bundle_header *header, int verbose)
{
	/*
	 * Do fast check, then if any prereqs are missing then go line by line
	 * to be verbose about the errors
	 */
	struct ref_list *p = &header->prerequisites;
	struct rev_info revs;
	const char *argv[] = {NULL, "--all", NULL};
	struct object_array refs;
	struct commit *commit;
	int i, ret = 0, req_nr;
	const char *message = "Repository lacks these prerequisite commits:";

	init_revisions(&revs, NULL);
	for (i = 0; i < p->nr; i++) {
		struct ref_list_entry *e = p->list + i;
		struct object *o = parse_object(e->sha1);
		if (o) {
			o->flags |= PREREQ_MARK;
			add_pending_object(&revs, o, e->name);
			continue;
		}
		if (++ret == 1)
			error("%s", message);
		error("%s %s", sha1_to_hex(e->sha1), e->name);
	}
	if (revs.pending.nr != p->nr)
		return ret;
	req_nr = revs.pending.nr;
	setup_revisions(2, argv, &revs, NULL);

	memset(&refs, 0, sizeof(struct object_array));
	for (i = 0; i < revs.pending.nr; i++) {
		struct object_array_entry *e = revs.pending.objects + i;
		add_object_array(e->item, e->name, &refs);
	}

	if (prepare_revision_walk(&revs))
		die("revision walk setup failed");

	i = req_nr;
	while (i && (commit = get_revision(&revs)))
		if (commit->object.flags & PREREQ_MARK)
			i--;

	for (i = 0; i < req_nr; i++)
		if (!(refs.objects[i].item->flags & SHOWN)) {
			if (++ret == 1)
				error("%s", message);
			error("%s %s", sha1_to_hex(refs.objects[i].item->sha1),
				refs.objects[i].name);
		}

	for (i = 0; i < refs.nr; i++)
		clear_commit_marks((struct commit *)refs.objects[i].item, -1);

	if (verbose) {
		struct ref_list *r;

		r = &header->references;
		printf("The bundle contains %d ref%s\n",
		       r->nr, (1 < r->nr) ? "s" : "");
		list_refs(r, 0, NULL);
		r = &header->prerequisites;
		printf("The bundle requires these %d ref%s\n",
		       r->nr, (1 < r->nr) ? "s" : "");
		list_refs(r, 0, NULL);
	}
	return ret;
}

int list_bundle_refs(struct bundle_header *header, int argc, const char **argv)
{
	return list_refs(&header->references, argc, argv);
}

static int is_tag_in_date_range(struct object *tag, struct rev_info *revs)
{
	unsigned long size;
	enum object_type type;
	char *buf, *line, *lineend;
	unsigned long date;

	if (revs->max_age == -1 && revs->min_age == -1)
		return 1;

	buf = read_sha1_file(tag->sha1, &type, &size);
	if (!buf)
		return 1;
	line = memmem(buf, size, "\ntagger ", 8);
	if (!line++)
		return 1;
	lineend = memchr(line, buf + size - line, '\n');
	line = memchr(line, lineend ? lineend - line : buf + size - line, '>');
	if (!line++)
		return 1;
	date = strtoul(line, NULL, 10);
	free(buf);
	return (revs->max_age == -1 || revs->max_age < date) &&
		(revs->min_age == -1 || revs->min_age > date);
}

int create_bundle(struct bundle_header *header, const char *path,
		int argc, const char **argv)
{
	static struct lock_file lock;
	int bundle_fd = -1;
	int bundle_to_stdout;
	const char **argv_boundary = xmalloc((argc + 4) * sizeof(const char *));
	const char **argv_pack = xmalloc(6 * sizeof(const char *));
	int i, ref_count = 0;
	char buffer[1024];
	struct rev_info revs;
	struct child_process rls;
	FILE *rls_fout;

	bundle_to_stdout = !strcmp(path, "-");
	if (bundle_to_stdout)
		bundle_fd = 1;
	else
		bundle_fd = hold_lock_file_for_update(&lock, path,
						      LOCK_DIE_ON_ERROR);

	/* write signature */
	write_or_die(bundle_fd, bundle_signature, strlen(bundle_signature));

	/* init revs to list objects for pack-objects later */
	save_commit_buffer = 0;
	init_revisions(&revs, NULL);

	/* write prerequisites */
	memcpy(argv_boundary + 3, argv + 1, argc * sizeof(const char *));
	argv_boundary[0] = "rev-list";
	argv_boundary[1] = "--boundary";
	argv_boundary[2] = "--pretty=oneline";
	argv_boundary[argc + 2] = NULL;
	memset(&rls, 0, sizeof(rls));
	rls.argv = argv_boundary;
	rls.out = -1;
	rls.git_cmd = 1;
	if (start_command(&rls))
		return -1;
	rls_fout = xfdopen(rls.out, "r");
	while (fgets(buffer, sizeof(buffer), rls_fout)) {
		unsigned char sha1[20];
		if (buffer[0] == '-') {
			write_or_die(bundle_fd, buffer, strlen(buffer));
			if (!get_sha1_hex(buffer + 1, sha1)) {
				struct object *object = parse_object(sha1);
				object->flags |= UNINTERESTING;
				add_pending_object(&revs, object, buffer);
			}
		} else if (!get_sha1_hex(buffer, sha1)) {
			struct object *object = parse_object(sha1);
			object->flags |= SHOWN;
		}
	}
	fclose(rls_fout);
	if (finish_command(&rls))
		return error("rev-list died");

	/* write references */
	argc = setup_revisions(argc, argv, &revs, NULL);

	if (argc > 1)
		return error("unrecognized argument: %s'", argv[1]);

	object_array_remove_duplicates(&revs.pending);

	for (i = 0; i < revs.pending.nr; i++) {
		struct object_array_entry *e = revs.pending.objects + i;
		unsigned char sha1[20];
		char *ref;
		const char *display_ref;
		int flag;

		if (e->item->flags & UNINTERESTING)
			continue;
		if (dwim_ref(e->name, strlen(e->name), sha1, &ref) != 1)
			continue;
		if (!resolve_ref(e->name, sha1, 1, &flag))
			flag = 0;
		display_ref = (flag & REF_ISSYMREF) ? e->name : ref;

		if (e->item->type == OBJ_TAG &&
				!is_tag_in_date_range(e->item, &revs)) {
			e->item->flags |= UNINTERESTING;
			continue;
		}

		/*
		 * Make sure the refs we wrote out is correct; --max-count and
		 * other limiting options could have prevented all the tips
		 * from getting output.
		 *
		 * Non commit objects such as tags and blobs do not have
		 * this issue as they are not affected by those extra
		 * constraints.
		 */
		if (!(e->item->flags & SHOWN) && e->item->type == OBJ_COMMIT) {
			warning("ref '%s' is excluded by the rev-list options",
				e->name);
			free(ref);
			continue;
		}
		/*
		 * If you run "git bundle create bndl v1.0..v2.0", the
		 * name of the positive ref is "v2.0" but that is the
		 * commit that is referenced by the tag, and not the tag
		 * itself.
		 */
		if (hashcmp(sha1, e->item->sha1)) {
			/*
			 * Is this the positive end of a range expressed
			 * in terms of a tag (e.g. v2.0 from the range
			 * "v1.0..v2.0")?
			 */
			struct commit *one = lookup_commit_reference(sha1);
			struct object *obj;

			if (e->item == &(one->object)) {
				/*
				 * Need to include e->name as an
				 * independent ref to the pack-objects
				 * input, so that the tag is included
				 * in the output; otherwise we would
				 * end up triggering "empty bundle"
				 * error.
				 */
				obj = parse_object(sha1);
				obj->flags |= SHOWN;
				add_pending_object(&revs, obj, e->name);
			}
			free(ref);
			continue;
		}

		ref_count++;
		write_or_die(bundle_fd, sha1_to_hex(e->item->sha1), 40);
		write_or_die(bundle_fd, " ", 1);
		write_or_die(bundle_fd, display_ref, strlen(display_ref));
		write_or_die(bundle_fd, "\n", 1);
		free(ref);
	}
	if (!ref_count)
		die ("Refusing to create empty bundle.");

	/* end header */
	write_or_die(bundle_fd, "\n", 1);

	/* write pack */
	argv_pack[0] = "pack-objects";
	argv_pack[1] = "--all-progress-implied";
	argv_pack[2] = "--stdout";
	argv_pack[3] = "--thin";
	argv_pack[4] = "--delta-base-offset";
	argv_pack[5] = NULL;
	memset(&rls, 0, sizeof(rls));
	rls.argv = argv_pack;
	rls.in = -1;
	rls.out = bundle_fd;
	rls.git_cmd = 1;
	if (start_command(&rls))
		return error("Could not spawn pack-objects");

	/*
	 * start_command closed bundle_fd if it was > 1
	 * so set the lock fd to -1 so commit_lock_file()
	 * won't fail trying to close it.
	 */
	lock.fd = -1;

	for (i = 0; i < revs.pending.nr; i++) {
		struct object *object = revs.pending.objects[i].item;
		if (object->flags & UNINTERESTING)
			write_or_die(rls.in, "^", 1);
		write_or_die(rls.in, sha1_to_hex(object->sha1), 40);
		write_or_die(rls.in, "\n", 1);
	}
	close(rls.in);
	if (finish_command(&rls))
		return error ("pack-objects died");
	if (!bundle_to_stdout) {
		if (commit_lock_file(&lock))
			die_errno("cannot create '%s'", path);
	}
	return 0;
}

int unbundle(struct bundle_header *header, int bundle_fd)
{
	const char *argv_index_pack[] = {"index-pack",
		"--fix-thin", "--stdin", NULL};
	struct child_process ip;

	if (verify_bundle(header, 0))
		return -1;
	memset(&ip, 0, sizeof(ip));
	ip.argv = argv_index_pack;
	ip.in = bundle_fd;
	ip.no_stdout = 1;
	ip.git_cmd = 1;
	if (run_command(&ip))
		return error("index-pack died");
	return 0;
}
Commit	Line	Data
30415d50 JS	1	#include "cache.h"
	2	#include "bundle.h"
	3	#include "object.h"
	4	#include "commit.h"
	5	#include "diff.h"
	6	#include "revision.h"
	7	#include "list-objects.h"
	8	#include "run-command.h"
fa303836	9	#include "refs.h"
30415d50 JS	10
	11	static const char bundle_signature[] = "# v2 git bundle\n";
	12
	13	static void add_to_ref_list(const unsigned char sha1, const char name,
	14	struct ref_list *list)
	15	{
	16	if (list->nr + 1 >= list->alloc) {
	17	list->alloc = alloc_nr(list->nr + 1);
	18	list->list = xrealloc(list->list,
	19	list->alloc * sizeof(list->list[0]));
	20	}
	21	memcpy(list->list[list->nr].sha1, sha1, 20);
	22	list->list[list->nr].name = xstrdup(name);
	23	list->nr++;
	24	}
	25
e9ee84cf JH	26	/* Eventually this should go to strbuf.[ch] */
	27	static int strbuf_readline_fd(struct strbuf *sb, int fd)
	28	{
	29	strbuf_reset(sb);
	30
	31	while (1) {
	32	char ch;
	33	ssize_t len = xread(fd, &ch, 1);
	34	if (len < 0)
	35	return -1;
	36	strbuf_addch(sb, ch);
	37	if (ch == '\n')
	38	break;
	39	}
	40	return 0;
	41	}
	42
f3fa1838 JH	43	int read_bundle_header(const char path, struct bundle_header header)
f3fa1838 JH	44	{
e9ee84cf JH	45	struct strbuf buf = STRBUF_INIT;
	46	int fd = open(path, O_RDONLY);
	47	int status = 0;
30415d50	48
e9ee84cf	49	if (fd < 0)
30415d50	50	return error("could not open '%s'", path);
e9ee84cf JH	51
	52	/* The bundle header begins with the signature */
	53	if (strbuf_readline_fd(&buf, fd) \|\|
	54	strcmp(buf.buf, bundle_signature)) {
	55	error("'%s' does not look like a v2 bundle file", path);
	56	status = -1;
	57	goto abort;
30415d50	58	}
e9ee84cf JH	59
	60	/* The bundle header ends with an empty line */
	61	while (!strbuf_readline_fd(&buf, fd) &&
	62	buf.len && buf.buf[0] != '\n') {
30415d50	63	unsigned char sha1[20];
e9ee84cf JH	64	int is_prereq = 0;
	65
	66	if (*buf.buf == '-') {
	67	is_prereq = 1;
	68	strbuf_remove(&buf, 0, 1);
	69	}
	70	strbuf_rtrim(&buf);
30415d50	71
e9ee84cf JH	72	/*
	73	* Tip lines have object name, SP, and refname.
	74	* Prerequisites have object name that is optionally
	75	* followed by SP and subject line.
	76	*/
	77	if (get_sha1_hex(buf.buf, sha1) \|\|
	78	(40 <= buf.len && !isspace(buf.buf[40])) \|\|
	79	(!is_prereq && buf.len <= 40)) {
	80	error("unrecognized header: %s%s (%d)",
	81	(is_prereq ? "-" : ""), buf.buf, (int)buf.len);
	82	status = -1;
	83	break;
	84	} else {
	85	if (is_prereq)
	86	add_to_ref_list(sha1, "", &header->prerequisites);
	87	else
	88	add_to_ref_list(sha1, buf.buf + 41, &header->references);
30415d50	89	}
30415d50	90	}
e9ee84cf JH	91
	92	abort:
	93	if (status) {
	94	close(fd);
	95	fd = -1;
	96	}
	97	strbuf_release(&buf);
30415d50 JS	98	return fd;
	99	}
	100
	101	static int list_refs(struct ref_list r, int argc, const char *argv)
	102	{
	103	int i;
	104
	105	for (i = 0; i < r->nr; i++) {
	106	if (argc > 1) {
	107	int j;
	108	for (j = 1; j < argc; j++)
	109	if (!strcmp(r->list[i].name, argv[j]))
	110	break;
	111	if (j == argc)
	112	continue;
	113	}
	114	printf("%s %s\n", sha1_to_hex(r->list[i].sha1),
	115	r->list[i].name);
	116	}
	117	return 0;
	118	}
	119
	120	#define PREREQ_MARK (1u<<16)
	121
	122	int verify_bundle(struct bundle_header *header, int verbose)
	123	{
	124	/*
	125	* Do fast check, then if any prereqs are missing then go line by line
	126	* to be verbose about the errors
	127	*/
	128	struct ref_list *p = &header->prerequisites;
	129	struct rev_info revs;
a80aad7b	130	const char *argv[] = {NULL, "--all", NULL};
30415d50 JS	131	struct object_array refs;
	132	struct commit *commit;
	133	int i, ret = 0, req_nr;
	134	const char *message = "Repository lacks these prerequisite commits:";
	135
	136	init_revisions(&revs, NULL);
	137	for (i = 0; i < p->nr; i++) {
	138	struct ref_list_entry *e = p->list + i;
	139	struct object *o = parse_object(e->sha1);
	140	if (o) {
	141	o->flags \|= PREREQ_MARK;
	142	add_pending_object(&revs, o, e->name);
	143	continue;
	144	}
	145	if (++ret == 1)
9db56f71	146	error("%s", message);
30415d50 JS	147	error("%s %s", sha1_to_hex(e->sha1), e->name);
	148	}
	149	if (revs.pending.nr != p->nr)
	150	return ret;
	151	req_nr = revs.pending.nr;
	152	setup_revisions(2, argv, &revs, NULL);
	153
	154	memset(&refs, 0, sizeof(struct object_array));
	155	for (i = 0; i < revs.pending.nr; i++) {
	156	struct object_array_entry *e = revs.pending.objects + i;
	157	add_object_array(e->item, e->name, &refs);
	158	}
	159
3d51e1b5 MK	160	if (prepare_revision_walk(&revs))
3d51e1b5 MK	161	die("revision walk setup failed");
30415d50 JS	162
	163	i = req_nr;
	164	while (i && (commit = get_revision(&revs)))
	165	if (commit->object.flags & PREREQ_MARK)
	166	i--;
	167
	168	for (i = 0; i < req_nr; i++)
	169	if (!(refs.objects[i].item->flags & SHOWN)) {
	170	if (++ret == 1)
9db56f71	171	error("%s", message);
30415d50 JS	172	error("%s %s", sha1_to_hex(refs.objects[i].item->sha1),
	173	refs.objects[i].name);
	174	}
	175
	176	for (i = 0; i < refs.nr; i++)
	177	clear_commit_marks((struct commit *)refs.objects[i].item, -1);
	178
	179	if (verbose) {
	180	struct ref_list *r;
	181
	182	r = &header->references;
	183	printf("The bundle contains %d ref%s\n",
	184	r->nr, (1 < r->nr) ? "s" : "");
	185	list_refs(r, 0, NULL);
	186	r = &header->prerequisites;
	187	printf("The bundle requires these %d ref%s\n",
	188	r->nr, (1 < r->nr) ? "s" : "");
	189	list_refs(r, 0, NULL);
	190	}
	191	return ret;
	192	}
	193
	194	int list_bundle_refs(struct bundle_header header, int argc, const char *argv)
	195	{
	196	return list_refs(&header->references, argc, argv);
	197	}
	198
c9a42c4a JS	199	static int is_tag_in_date_range(struct object tag, struct rev_info revs)
	200	{
	201	unsigned long size;
	202	enum object_type type;
	203	char buf, line, *lineend;
	204	unsigned long date;
	205
	206	if (revs->max_age == -1 && revs->min_age == -1)
	207	return 1;
	208
	209	buf = read_sha1_file(tag->sha1, &type, &size);
	210	if (!buf)
	211	return 1;
	212	line = memmem(buf, size, "\ntagger ", 8);
	213	if (!line++)
	214	return 1;
	215	lineend = memchr(line, buf + size - line, '\n');
	216	line = memchr(line, lineend ? lineend - line : buf + size - line, '>');
	217	if (!line++)
	218	return 1;
	219	date = strtoul(line, NULL, 10);
	220	free(buf);
	221	return (revs->max_age == -1 \|\| revs->max_age < date) &&
	222	(revs->min_age == -1 \|\| revs->min_age > date);
	223	}
	224
30415d50 JS	225	int create_bundle(struct bundle_header header, const char path,
	226	int argc, const char **argv)
	227	{
	228	static struct lock_file lock;
	229	int bundle_fd = -1;
	230	int bundle_to_stdout;
	231	const char *argv_boundary = xmalloc((argc + 4) sizeof(const char *));
787d2a78	232	const char *argv_pack = xmalloc(6 sizeof(const char *));
30415d50 JS	233	int i, ref_count = 0;
	234	char buffer[1024];
	235	struct rev_info revs;
	236	struct child_process rls;
	237	FILE *rls_fout;
	238
	239	bundle_to_stdout = !strcmp(path, "-");
	240	if (bundle_to_stdout)
	241	bundle_fd = 1;
	242	else
acd3b9ec JH	243	bundle_fd = hold_lock_file_for_update(&lock, path,
acd3b9ec JH	244	LOCK_DIE_ON_ERROR);
30415d50 JS	245
	246	/* write signature */
	247	write_or_die(bundle_fd, bundle_signature, strlen(bundle_signature));
	248
	249	/* init revs to list objects for pack-objects later */
	250	save_commit_buffer = 0;
	251	init_revisions(&revs, NULL);
	252
	253	/* write prerequisites */
	254	memcpy(argv_boundary + 3, argv + 1, argc * sizeof(const char *));
	255	argv_boundary[0] = "rev-list";
	256	argv_boundary[1] = "--boundary";
	257	argv_boundary[2] = "--pretty=oneline";
	258	argv_boundary[argc + 2] = NULL;
	259	memset(&rls, 0, sizeof(rls));
	260	rls.argv = argv_boundary;
	261	rls.out = -1;
	262	rls.git_cmd = 1;
	263	if (start_command(&rls))
	264	return -1;
41698375	265	rls_fout = xfdopen(rls.out, "r");
30415d50 JS	266	while (fgets(buffer, sizeof(buffer), rls_fout)) {
	267	unsigned char sha1[20];
	268	if (buffer[0] == '-') {
	269	write_or_die(bundle_fd, buffer, strlen(buffer));
	270	if (!get_sha1_hex(buffer + 1, sha1)) {
	271	struct object *object = parse_object(sha1);
	272	object->flags \|= UNINTERESTING;
	273	add_pending_object(&revs, object, buffer);
	274	}
	275	} else if (!get_sha1_hex(buffer, sha1)) {
	276	struct object *object = parse_object(sha1);
	277	object->flags \|= SHOWN;
	278	}
	279	}
	280	fclose(rls_fout);
	281	if (finish_command(&rls))
	282	return error("rev-list died");
	283
	284	/* write references */
	285	argc = setup_revisions(argc, argv, &revs, NULL);
22568f0a	286
8b3dce56 JH	287	if (argc > 1)
8b3dce56 JH	288	return error("unrecognized argument: %s'", argv[1]);
30415d50	289
b2a6d1c6 JH	290	object_array_remove_duplicates(&revs.pending);
b2a6d1c6 JH	291
30415d50 JS	292	for (i = 0; i < revs.pending.nr; i++) {
	293	struct object_array_entry *e = revs.pending.objects + i;
	294	unsigned char sha1[20];
	295	char *ref;
fa303836 JH	296	const char *display_ref;
fa303836 JH	297	int flag;
30415d50 JS	298
	299	if (e->item->flags & UNINTERESTING)
	300	continue;
	301	if (dwim_ref(e->name, strlen(e->name), sha1, &ref) != 1)
	302	continue;
fa303836 JH	303	if (!resolve_ref(e->name, sha1, 1, &flag))
	304	flag = 0;
	305	display_ref = (flag & REF_ISSYMREF) ? e->name : ref;
	306
c9a42c4a JS	307	if (e->item->type == OBJ_TAG &&
	308	!is_tag_in_date_range(e->item, &revs)) {
	309	e->item->flags \|= UNINTERESTING;
	310	continue;
	311	}
	312
30415d50 JS	313	/*
	314	* Make sure the refs we wrote out is correct; --max-count and
	315	* other limiting options could have prevented all the tips
	316	* from getting output.
	317	*
	318	* Non commit objects such as tags and blobs do not have
	319	* this issue as they are not affected by those extra
	320	* constraints.
	321	*/
	322	if (!(e->item->flags & SHOWN) && e->item->type == OBJ_COMMIT) {
	323	warning("ref '%s' is excluded by the rev-list options",
	324	e->name);
	325	free(ref);
	326	continue;
	327	}
	328	/*
	329	* If you run "git bundle create bndl v1.0..v2.0", the
	330	* name of the positive ref is "v2.0" but that is the
	331	* commit that is referenced by the tag, and not the tag
	332	* itself.
	333	*/
	334	if (hashcmp(sha1, e->item->sha1)) {
	335	/*
	336	* Is this the positive end of a range expressed
	337	* in terms of a tag (e.g. v2.0 from the range
	338	* "v1.0..v2.0")?
	339	*/
	340	struct commit *one = lookup_commit_reference(sha1);
	341	struct object *obj;
	342
	343	if (e->item == &(one->object)) {
	344	/*
	345	* Need to include e->name as an
	346	* independent ref to the pack-objects
	347	* input, so that the tag is included
	348	* in the output; otherwise we would
	349	* end up triggering "empty bundle"
	350	* error.
	351	*/
	352	obj = parse_object(sha1);
	353	obj->flags \|= SHOWN;
	354	add_pending_object(&revs, obj, e->name);
	355	}
	356	free(ref);
	357	continue;
	358	}
	359
	360	ref_count++;
	361	write_or_die(bundle_fd, sha1_to_hex(e->item->sha1), 40);
	362	write_or_die(bundle_fd, " ", 1);
fa303836	363	write_or_die(bundle_fd, display_ref, strlen(display_ref));
30415d50 JS	364	write_or_die(bundle_fd, "\n", 1);
	365	free(ref);
	366	}
	367	if (!ref_count)
	368	die ("Refusing to create empty bundle.");
	369
	370	/* end header */
	371	write_or_die(bundle_fd, "\n", 1);
	372
	373	/* write pack */
	374	argv_pack[0] = "pack-objects";
4f366275	375	argv_pack[1] = "--all-progress-implied";
30415d50 JS	376	argv_pack[2] = "--stdout";
30415d50 JS	377	argv_pack[3] = "--thin";
787d2a78 SP	378	argv_pack[4] = "--delta-base-offset";
787d2a78 SP	379	argv_pack[5] = NULL;
30415d50 JS	380	memset(&rls, 0, sizeof(rls));
	381	rls.argv = argv_pack;
	382	rls.in = -1;
	383	rls.out = bundle_fd;
	384	rls.git_cmd = 1;
	385	if (start_command(&rls))
	386	return error("Could not spawn pack-objects");
4ed7cd3a BC	387
	388	/*
	389	* start_command closed bundle_fd if it was > 1
	390	* so set the lock fd to -1 so commit_lock_file()
	391	* won't fail trying to close it.
	392	*/
	393	lock.fd = -1;
	394
30415d50 JS	395	for (i = 0; i < revs.pending.nr; i++) {
	396	struct object *object = revs.pending.objects[i].item;
	397	if (object->flags & UNINTERESTING)
95693d45 JM	398	write_or_die(rls.in, "^", 1);
	399	write_or_die(rls.in, sha1_to_hex(object->sha1), 40);
	400	write_or_die(rls.in, "\n", 1);
30415d50	401	}
e72ae288	402	close(rls.in);
30415d50 JS	403	if (finish_command(&rls))
30415d50 JS	404	return error ("pack-objects died");
0f5cdf65 CH	405	if (!bundle_to_stdout) {
	406	if (commit_lock_file(&lock))
	407	die_errno("cannot create '%s'", path);
	408	}
c20181e3	409	return 0;
30415d50 JS	410	}
	411
	412	int unbundle(struct bundle_header *header, int bundle_fd)
	413	{
	414	const char *argv_index_pack[] = {"index-pack",
	415	"--fix-thin", "--stdin", NULL};
	416	struct child_process ip;
	417
	418	if (verify_bundle(header, 0))
	419	return -1;
	420	memset(&ip, 0, sizeof(ip));
	421	ip.argv = argv_index_pack;
	422	ip.in = bundle_fd;
	423	ip.no_stdout = 1;
	424	ip.git_cmd = 1;
	425	if (run_command(&ip))
	426	return error("index-pack died");
	427	return 0;
	428	}