[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++;
}

static int parse_bundle_header(int fd, struct bundle_header *header,
			       const char *report_path)
{
	struct strbuf buf = STRBUF_INIT;
	int status = 0;

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

	/* The bundle header ends with an empty line */
	while (!strbuf_getwholeline_fd(&buf, fd, '\n') &&
	       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)) {
			if (report_path)
				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;
}

int read_bundle_header(const char *path, struct bundle_header *header)
{
	int fd = open(path, O_RDONLY);

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

int is_bundle(const char *path, int quiet)
{
	struct bundle_header header;
	int fd = open(path, O_RDONLY);

	if (fd < 0)
		return 0;
	memset(&header, 0, sizeof(header));
	fd = parse_bundle_header(fd, &header, quiet ? NULL : path);
	if (fd >= 0)
		close(fd);
	return (fd >= 0);
}

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);

	refs = revs.pending;
	revs.leak_pending = 1;

	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);
		}

	clear_commit_marks_for_object_array(&refs, ALL_REV_FLAGS);
	free(refs.objects);

	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;
	struct strbuf buf = STRBUF_INIT;
	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 (strbuf_getwholeline(&buf, rls_fout, '\n') != EOF) {
		unsigned char sha1[20];
		if (buf.len > 0 && buf.buf[0] == '-') {
			write_or_die(bundle_fd, buf.buf, buf.len);
			if (!get_sha1_hex(buf.buf + 1, sha1)) {
				struct object *object = parse_object(sha1);
				object->flags |= UNINTERESTING;
				add_pending_object(&revs, object, xstrdup(buf.buf));
			}
		} else if (!get_sha1_hex(buf.buf, sha1)) {
			struct object *object = parse_object(sha1);
			object->flags |= SHOWN;
		}
	}
	strbuf_release(&buf);
	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 (read_ref_full(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, int flags)
{
	const char *argv_index_pack[] = {"index-pack",
					 "--fix-thin", "--stdin", NULL, NULL};
	struct child_process ip;

	if (flags & BUNDLE_VERBOSE)
		argv_index_pack[3] = "-v";

	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
2727b71f JH	26	static int parse_bundle_header(int fd, struct bundle_header *header,
2727b71f JH	27	const char *report_path)
f3fa1838	28	{
e9ee84cf	29	struct strbuf buf = STRBUF_INIT;
e9ee84cf	30	int status = 0;
30415d50	31
e9ee84cf	32	/* The bundle header begins with the signature */
5e8617f5	33	if (strbuf_getwholeline_fd(&buf, fd, '\n') \|\|
e9ee84cf	34	strcmp(buf.buf, bundle_signature)) {
2727b71f JH	35	if (report_path)
	36	error("'%s' does not look like a v2 bundle file",
	37	report_path);
e9ee84cf JH	38	status = -1;
e9ee84cf JH	39	goto abort;
30415d50	40	}
e9ee84cf JH	41
e9ee84cf JH	42	/* The bundle header ends with an empty line */
5e8617f5	43	while (!strbuf_getwholeline_fd(&buf, fd, '\n') &&
e9ee84cf	44	buf.len && buf.buf[0] != '\n') {
30415d50	45	unsigned char sha1[20];
e9ee84cf JH	46	int is_prereq = 0;
	47
	48	if (*buf.buf == '-') {
	49	is_prereq = 1;
	50	strbuf_remove(&buf, 0, 1);
30415d50	51	}
e9ee84cf	52	strbuf_rtrim(&buf);
30415d50	53
e9ee84cf JH	54	/*
	55	* Tip lines have object name, SP, and refname.
	56	* Prerequisites have object name that is optionally
	57	* followed by SP and subject line.
	58	*/
	59	if (get_sha1_hex(buf.buf, sha1) \|\|
	60	(40 <= buf.len && !isspace(buf.buf[40])) \|\|
	61	(!is_prereq && buf.len <= 40)) {
2727b71f JH	62	if (report_path)
	63	error("unrecognized header: %s%s (%d)",
	64	(is_prereq ? "-" : ""), buf.buf, (int)buf.len);
e9ee84cf JH	65	status = -1;
	66	break;
	67	} else {
	68	if (is_prereq)
	69	add_to_ref_list(sha1, "", &header->prerequisites);
	70	else
	71	add_to_ref_list(sha1, buf.buf + 41, &header->references);
30415d50	72	}
30415d50	73	}
e9ee84cf JH	74
	75	abort:
	76	if (status) {
	77	close(fd);
	78	fd = -1;
30415d50	79	}
e9ee84cf	80	strbuf_release(&buf);
30415d50 JS	81	return fd;
	82	}
	83
2727b71f JH	84	int read_bundle_header(const char path, struct bundle_header header)
	85	{
	86	int fd = open(path, O_RDONLY);
	87
30415d50 JS	88	if (fd < 0)
30415d50 JS	89	return error("could not open '%s'", path);
2727b71f JH	90	return parse_bundle_header(fd, header, path);
	91	}
	92
	93	int is_bundle(const char *path, int quiet)
	94	{
	95	struct bundle_header header;
	96	int fd = open(path, O_RDONLY);
	97
	98	if (fd < 0)
	99	return 0;
	100	memset(&header, 0, sizeof(header));
	101	fd = parse_bundle_header(fd, &header, quiet ? NULL : path);
	102	if (fd >= 0)
	103	close(fd);
	104	return (fd >= 0);
30415d50 JS	105	}
	106
	107	static int list_refs(struct ref_list r, int argc, const char *argv)
	108	{
	109	int i;
	110
	111	for (i = 0; i < r->nr; i++) {
	112	if (argc > 1) {
	113	int j;
	114	for (j = 1; j < argc; j++)
	115	if (!strcmp(r->list[i].name, argv[j]))
	116	break;
	117	if (j == argc)
	118	continue;
	119	}
	120	printf("%s %s\n", sha1_to_hex(r->list[i].sha1),
	121	r->list[i].name);
	122	}
	123	return 0;
	124	}
	125
	126	#define PREREQ_MARK (1u<<16)
	127
	128	int verify_bundle(struct bundle_header *header, int verbose)
	129	{
	130	/*
	131	* Do fast check, then if any prereqs are missing then go line by line
	132	* to be verbose about the errors
	133	*/
	134	struct ref_list *p = &header->prerequisites;
	135	struct rev_info revs;
a80aad7b	136	const char *argv[] = {NULL, "--all", NULL};
30415d50 JS	137	struct object_array refs;
	138	struct commit *commit;
	139	int i, ret = 0, req_nr;
	140	const char *message = "Repository lacks these prerequisite commits:";
	141
	142	init_revisions(&revs, NULL);
	143	for (i = 0; i < p->nr; i++) {
	144	struct ref_list_entry *e = p->list + i;
	145	struct object *o = parse_object(e->sha1);
	146	if (o) {
	147	o->flags \|= PREREQ_MARK;
	148	add_pending_object(&revs, o, e->name);
	149	continue;
	150	}
	151	if (++ret == 1)
9db56f71	152	error("%s", message);
30415d50 JS	153	error("%s %s", sha1_to_hex(e->sha1), e->name);
	154	}
	155	if (revs.pending.nr != p->nr)
	156	return ret;
	157	req_nr = revs.pending.nr;
	158	setup_revisions(2, argv, &revs, NULL);
	159
5be78599 RS	160	refs = revs.pending;
5be78599 RS	161	revs.leak_pending = 1;
30415d50	162
3d51e1b5 MK	163	if (prepare_revision_walk(&revs))
3d51e1b5 MK	164	die("revision walk setup failed");
30415d50 JS	165
	166	i = req_nr;
	167	while (i && (commit = get_revision(&revs)))
	168	if (commit->object.flags & PREREQ_MARK)
	169	i--;
	170
	171	for (i = 0; i < req_nr; i++)
	172	if (!(refs.objects[i].item->flags & SHOWN)) {
	173	if (++ret == 1)
9db56f71	174	error("%s", message);
30415d50 JS	175	error("%s %s", sha1_to_hex(refs.objects[i].item->sha1),
	176	refs.objects[i].name);
	177	}
	178
86a0a408	179	clear_commit_marks_for_object_array(&refs, ALL_REV_FLAGS);
5be78599	180	free(refs.objects);
30415d50 JS	181
	182	if (verbose) {
	183	struct ref_list *r;
	184
	185	r = &header->references;
	186	printf("The bundle contains %d ref%s\n",
	187	r->nr, (1 < r->nr) ? "s" : "");
	188	list_refs(r, 0, NULL);
	189	r = &header->prerequisites;
	190	printf("The bundle requires these %d ref%s\n",
	191	r->nr, (1 < r->nr) ? "s" : "");
	192	list_refs(r, 0, NULL);
	193	}
	194	return ret;
	195	}
	196
	197	int list_bundle_refs(struct bundle_header header, int argc, const char *argv)
	198	{
	199	return list_refs(&header->references, argc, argv);
	200	}
	201
c9a42c4a JS	202	static int is_tag_in_date_range(struct object tag, struct rev_info revs)
	203	{
	204	unsigned long size;
	205	enum object_type type;
	206	char buf, line, *lineend;
	207	unsigned long date;
	208
	209	if (revs->max_age == -1 && revs->min_age == -1)
	210	return 1;
	211
	212	buf = read_sha1_file(tag->sha1, &type, &size);
	213	if (!buf)
	214	return 1;
	215	line = memmem(buf, size, "\ntagger ", 8);
	216	if (!line++)
	217	return 1;
	218	lineend = memchr(line, buf + size - line, '\n');
	219	line = memchr(line, lineend ? lineend - line : buf + size - line, '>');
	220	if (!line++)
	221	return 1;
	222	date = strtoul(line, NULL, 10);
	223	free(buf);
	224	return (revs->max_age == -1 \|\| revs->max_age < date) &&
	225	(revs->min_age == -1 \|\| revs->min_age > date);
	226	}
	227
30415d50 JS	228	int create_bundle(struct bundle_header header, const char path,
	229	int argc, const char **argv)
	230	{
	231	static struct lock_file lock;
	232	int bundle_fd = -1;
	233	int bundle_to_stdout;
	234	const char *argv_boundary = xmalloc((argc + 4) sizeof(const char *));
787d2a78	235	const char *argv_pack = xmalloc(6 sizeof(const char *));
30415d50	236	int i, ref_count = 0;
bc2fed49	237	struct strbuf buf = STRBUF_INIT;
30415d50 JS	238	struct rev_info revs;
	239	struct child_process rls;
	240	FILE *rls_fout;
	241
	242	bundle_to_stdout = !strcmp(path, "-");
	243	if (bundle_to_stdout)
	244	bundle_fd = 1;
	245	else
acd3b9ec JH	246	bundle_fd = hold_lock_file_for_update(&lock, path,
acd3b9ec JH	247	LOCK_DIE_ON_ERROR);
30415d50 JS	248
	249	/* write signature */
	250	write_or_die(bundle_fd, bundle_signature, strlen(bundle_signature));
	251
	252	/* init revs to list objects for pack-objects later */
	253	save_commit_buffer = 0;
	254	init_revisions(&revs, NULL);
	255
	256	/* write prerequisites */
	257	memcpy(argv_boundary + 3, argv + 1, argc * sizeof(const char *));
	258	argv_boundary[0] = "rev-list";
	259	argv_boundary[1] = "--boundary";
	260	argv_boundary[2] = "--pretty=oneline";
	261	argv_boundary[argc + 2] = NULL;
	262	memset(&rls, 0, sizeof(rls));
	263	rls.argv = argv_boundary;
	264	rls.out = -1;
	265	rls.git_cmd = 1;
	266	if (start_command(&rls))
	267	return -1;
41698375	268	rls_fout = xfdopen(rls.out, "r");
bc2fed49	269	while (strbuf_getwholeline(&buf, rls_fout, '\n') != EOF) {
30415d50	270	unsigned char sha1[20];
bc2fed49 TR	271	if (buf.len > 0 && buf.buf[0] == '-') {
	272	write_or_die(bundle_fd, buf.buf, buf.len);
	273	if (!get_sha1_hex(buf.buf + 1, sha1)) {
30415d50 JS	274	struct object *object = parse_object(sha1);
30415d50 JS	275	object->flags \|= UNINTERESTING;
efe4be12	276	add_pending_object(&revs, object, xstrdup(buf.buf));
30415d50	277	}
bc2fed49	278	} else if (!get_sha1_hex(buf.buf, sha1)) {
30415d50 JS	279	struct object *object = parse_object(sha1);
	280	object->flags \|= SHOWN;
	281	}
	282	}
bc2fed49	283	strbuf_release(&buf);
30415d50 JS	284	fclose(rls_fout);
	285	if (finish_command(&rls))
	286	return error("rev-list died");
	287
	288	/* write references */
	289	argc = setup_revisions(argc, argv, &revs, NULL);
22568f0a	290
8b3dce56 JH	291	if (argc > 1)
8b3dce56 JH	292	return error("unrecognized argument: %s'", argv[1]);
30415d50	293
b2a6d1c6 JH	294	object_array_remove_duplicates(&revs.pending);
b2a6d1c6 JH	295
30415d50 JS	296	for (i = 0; i < revs.pending.nr; i++) {
	297	struct object_array_entry *e = revs.pending.objects + i;
	298	unsigned char sha1[20];
	299	char *ref;
fa303836 JH	300	const char *display_ref;
fa303836 JH	301	int flag;
30415d50 JS	302
	303	if (e->item->flags & UNINTERESTING)
	304	continue;
	305	if (dwim_ref(e->name, strlen(e->name), sha1, &ref) != 1)
	306	continue;
c6893323	307	if (read_ref_full(e->name, sha1, 1, &flag))
fa303836 JH	308	flag = 0;
	309	display_ref = (flag & REF_ISSYMREF) ? e->name : ref;
	310
c9a42c4a JS	311	if (e->item->type == OBJ_TAG &&
	312	!is_tag_in_date_range(e->item, &revs)) {
	313	e->item->flags \|= UNINTERESTING;
	314	continue;
	315	}
	316
30415d50 JS	317	/*
	318	* Make sure the refs we wrote out is correct; --max-count and
	319	* other limiting options could have prevented all the tips
	320	* from getting output.
	321	*
	322	* Non commit objects such as tags and blobs do not have
	323	* this issue as they are not affected by those extra
	324	* constraints.
	325	*/
	326	if (!(e->item->flags & SHOWN) && e->item->type == OBJ_COMMIT) {
	327	warning("ref '%s' is excluded by the rev-list options",
	328	e->name);
	329	free(ref);
	330	continue;
	331	}
	332	/*
	333	* If you run "git bundle create bndl v1.0..v2.0", the
	334	* name of the positive ref is "v2.0" but that is the
	335	* commit that is referenced by the tag, and not the tag
	336	* itself.
	337	*/
	338	if (hashcmp(sha1, e->item->sha1)) {
	339	/*
	340	* Is this the positive end of a range expressed
	341	* in terms of a tag (e.g. v2.0 from the range
	342	* "v1.0..v2.0")?
	343	*/
	344	struct commit *one = lookup_commit_reference(sha1);
	345	struct object *obj;
	346
	347	if (e->item == &(one->object)) {
	348	/*
	349	* Need to include e->name as an
	350	* independent ref to the pack-objects
	351	* input, so that the tag is included
	352	* in the output; otherwise we would
	353	* end up triggering "empty bundle"
	354	* error.
	355	*/
	356	obj = parse_object(sha1);
	357	obj->flags \|= SHOWN;
	358	add_pending_object(&revs, obj, e->name);
	359	}
	360	free(ref);
	361	continue;
	362	}
	363
	364	ref_count++;
	365	write_or_die(bundle_fd, sha1_to_hex(e->item->sha1), 40);
	366	write_or_die(bundle_fd, " ", 1);
fa303836	367	write_or_die(bundle_fd, display_ref, strlen(display_ref));
30415d50 JS	368	write_or_die(bundle_fd, "\n", 1);
	369	free(ref);
	370	}
	371	if (!ref_count)
	372	die ("Refusing to create empty bundle.");
	373
	374	/* end header */
	375	write_or_die(bundle_fd, "\n", 1);
	376
	377	/* write pack */
	378	argv_pack[0] = "pack-objects";
4f366275	379	argv_pack[1] = "--all-progress-implied";
30415d50 JS	380	argv_pack[2] = "--stdout";
30415d50 JS	381	argv_pack[3] = "--thin";
787d2a78 SP	382	argv_pack[4] = "--delta-base-offset";
787d2a78 SP	383	argv_pack[5] = NULL;
30415d50 JS	384	memset(&rls, 0, sizeof(rls));
	385	rls.argv = argv_pack;
	386	rls.in = -1;
	387	rls.out = bundle_fd;
	388	rls.git_cmd = 1;
	389	if (start_command(&rls))
	390	return error("Could not spawn pack-objects");
4ed7cd3a BC	391
	392	/*
	393	* start_command closed bundle_fd if it was > 1
	394	* so set the lock fd to -1 so commit_lock_file()
	395	* won't fail trying to close it.
	396	*/
	397	lock.fd = -1;
	398
30415d50 JS	399	for (i = 0; i < revs.pending.nr; i++) {
	400	struct object *object = revs.pending.objects[i].item;
	401	if (object->flags & UNINTERESTING)
95693d45 JM	402	write_or_die(rls.in, "^", 1);
	403	write_or_die(rls.in, sha1_to_hex(object->sha1), 40);
	404	write_or_die(rls.in, "\n", 1);
30415d50	405	}
e72ae288	406	close(rls.in);
30415d50 JS	407	if (finish_command(&rls))
30415d50 JS	408	return error ("pack-objects died");
0f5cdf65 CH	409	if (!bundle_to_stdout) {
	410	if (commit_lock_file(&lock))
	411	die_errno("cannot create '%s'", path);
	412	}
c20181e3	413	return 0;
30415d50 JS	414	}
30415d50 JS	415
be042aff	416	int unbundle(struct bundle_header *header, int bundle_fd, int flags)
30415d50 JS	417	{
30415d50 JS	418	const char *argv_index_pack[] = {"index-pack",
be042aff	419	"--fix-thin", "--stdin", NULL, NULL};
30415d50 JS	420	struct child_process ip;
30415d50 JS	421
be042aff JH	422	if (flags & BUNDLE_VERBOSE)
	423	argv_index_pack[3] = "-v";
	424
30415d50 JS	425	if (verify_bundle(header, 0))
	426	return -1;
	427	memset(&ip, 0, sizeof(ip));
	428	ip.argv = argv_index_pack;
	429	ip.in = bundle_fd;
	430	ip.no_stdout = 1;
	431	ip.git_cmd = 1;
	432	if (run_command(&ip))
	433	return error("index-pack died");
	434	return 0;
	435	}