[thirdparty/git.git] / bundle.c

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


static const char v2_bundle_signature[] = "# v2 git bundle\n";
static const char v3_bundle_signature[] = "# v3 git bundle\n";
static struct {
	int version;
	const char *signature;
} bundle_sigs[] = {
	{ 2, v2_bundle_signature },
	{ 3, v3_bundle_signature },
};

static void add_to_ref_list(const struct object_id *oid, const char *name,
		struct ref_list *list)
{
	ALLOC_GROW(list->list, list->nr + 1, list->alloc);
	oidcpy(&list->list[list->nr].oid, oid);
	list->list[list->nr].name = xstrdup(name);
	list->nr++;
}

static int parse_capability(struct bundle_header *header, const char *capability)
{
	const char *arg;
	if (skip_prefix(capability, "object-format=", &arg)) {
		int algo = hash_algo_by_name(arg);
		if (algo == GIT_HASH_UNKNOWN)
			return error(_("unrecognized bundle hash algorithm: %s"), arg);
		header->hash_algo = &hash_algos[algo];
		return 0;
	}
	return error(_("unknown capability '%s'"), capability);
}

static int parse_bundle_signature(struct bundle_header *header, const char *line)
{
	int i;

	for (i = 0; i < ARRAY_SIZE(bundle_sigs); i++) {
		if (!strcmp(line, bundle_sigs[i].signature)) {
			header->version = bundle_sigs[i].version;
			return 0;
		}
	}
	return -1;
}

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') ||
	    parse_bundle_signature(header, buf.buf)) {
		if (report_path)
			error(_("'%s' does not look like a v2 or v3 bundle file"),
			      report_path);
		status = -1;
		goto abort;
	}

	header->hash_algo = the_hash_algo;

	/* The bundle header ends with an empty line */
	while (!strbuf_getwholeline_fd(&buf, fd, '\n') &&
	       buf.len && buf.buf[0] != '\n') {
		struct object_id oid;
		int is_prereq = 0;
		const char *p;

		strbuf_rtrim(&buf);

		if (header->version == 3 && *buf.buf == '@') {
			if (parse_capability(header, buf.buf + 1)) {
				status = -1;
				break;
			}
			continue;
		}

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

		/*
		 * Tip lines have object name, SP, and refname.
		 * Prerequisites have object name that is optionally
		 * followed by SP and subject line.
		 */
		if (parse_oid_hex_algop(buf.buf, &oid, &p, header->hash_algo) ||
		    (*p && !isspace(*p)) ||
		    (!is_prereq && !*p)) {
			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(&oid, "", &header->prerequisites);
			else
				add_to_ref_list(&oid, p + 1, &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", oid_to_hex(&r->list[i].oid),
				r->list[i].name);
	}
	return 0;
}

/* Remember to update object flag allocation in object.h */
#define PREREQ_MARK (1u<<16)

int verify_bundle(struct repository *r,
		  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 commit *commit;
	int i, ret = 0, req_nr;
	const char *message = _("Repository lacks these prerequisite commits:");

	if (!r || !r->objects || !r->objects->odb)
		return error(_("need a repository to verify a bundle"));

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

	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 < p->nr; i++) {
		struct ref_list_entry *e = p->list + i;
		struct object *o = parse_object(r, &e->oid);
		assert(o); /* otherwise we'd have returned early */
		if (o->flags & SHOWN)
			continue;
		if (++ret == 1)
			error("%s", message);
		error("%s %s", oid_to_hex(&e->oid), e->name);
	}

	/* Clean up objects used, as they will be reused. */
	for (i = 0; i < p->nr; i++) {
		struct ref_list_entry *e = p->list + i;
		commit = lookup_commit_reference_gently(r, &e->oid, 1);
		if (commit)
			clear_commit_marks(commit, ALL_REV_FLAGS);
	}

	if (verbose) {
		struct ref_list *r;

		r = &header->references;
		printf_ln(Q_("The bundle contains this ref:",
			     "The bundle contains these %d refs:",
			     r->nr),
			  r->nr);
		list_refs(r, 0, NULL);
		r = &header->prerequisites;
		if (!r->nr) {
			printf_ln(_("The bundle records a complete history."));
		} else {
			printf_ln(Q_("The bundle requires this ref:",
				     "The bundle requires these %d refs:",
				     r->nr),
				  r->nr);
			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 = NULL, *line, *lineend;
	timestamp_t date;
	int result = 1;

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

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


/* Write the pack data to bundle_fd */
static int write_pack_data(int bundle_fd, struct rev_info *revs, struct strvec *pack_options)
{
	struct child_process pack_objects = CHILD_PROCESS_INIT;
	int i;

	strvec_pushl(&pack_objects.args,
		     "pack-objects",
		     "--stdout", "--thin", "--delta-base-offset",
		     NULL);
	strvec_pushv(&pack_objects.args, pack_options->v);
	pack_objects.in = -1;
	pack_objects.out = bundle_fd;
	pack_objects.git_cmd = 1;

	/*
	 * start_command() will close our descriptor if it's >1. Duplicate it
	 * to avoid surprising the caller.
	 */
	if (pack_objects.out > 1) {
		pack_objects.out = dup(pack_objects.out);
		if (pack_objects.out < 0) {
			error_errno(_("unable to dup bundle descriptor"));
			child_process_clear(&pack_objects);
			return -1;
		}
	}

	if (start_command(&pack_objects))
		return error(_("Could not spawn pack-objects"));

	for (i = 0; i < revs->pending.nr; i++) {
		struct object *object = revs->pending.objects[i].item;
		if (object->flags & UNINTERESTING)
			write_or_die(pack_objects.in, "^", 1);
		write_or_die(pack_objects.in, oid_to_hex(&object->oid), the_hash_algo->hexsz);
		write_or_die(pack_objects.in, "\n", 1);
	}
	close(pack_objects.in);
	if (finish_command(&pack_objects))
		return error(_("pack-objects died"));
	return 0;
}

static int compute_and_write_prerequisites(int bundle_fd,
					   struct rev_info *revs,
					   int argc, const char **argv)
{
	struct child_process rls = CHILD_PROCESS_INIT;
	struct strbuf buf = STRBUF_INIT;
	FILE *rls_fout;
	int i;

	strvec_pushl(&rls.args,
		     "rev-list", "--boundary", "--pretty=oneline",
		     NULL);
	for (i = 1; i < argc; i++)
		strvec_push(&rls.args, argv[i]);
	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) {
		struct object_id oid;
		if (buf.len > 0 && buf.buf[0] == '-') {
			write_or_die(bundle_fd, buf.buf, buf.len);
			if (!get_oid_hex(buf.buf + 1, &oid)) {
				struct object *object = parse_object_or_die(&oid,
									    buf.buf);
				object->flags |= UNINTERESTING;
				add_pending_object(revs, object, buf.buf);
			}
		} else if (!get_oid_hex(buf.buf, &oid)) {
			struct object *object = parse_object_or_die(&oid,
								    buf.buf);
			object->flags |= SHOWN;
		}
	}
	strbuf_release(&buf);
	fclose(rls_fout);
	if (finish_command(&rls))
		return error(_("rev-list died"));
	return 0;
}

/*
 * Write out bundle refs based on the tips already
 * parsed into revs.pending. As a side effect, may
 * manipulate revs.pending to include additional
 * necessary objects (like tags).
 *
 * Returns the number of refs written, or negative
 * on error.
 */
static int write_bundle_refs(int bundle_fd, struct rev_info *revs)
{
	int i;
	int ref_count = 0;

	for (i = 0; i < revs->pending.nr; i++) {
		struct object_array_entry *e = revs->pending.objects + i;
		struct object_id oid;
		char *ref;
		const char *display_ref;
		int flag;

		if (e->item->flags & UNINTERESTING)
			continue;
		if (dwim_ref(e->name, strlen(e->name), &oid, &ref, 0) != 1)
			goto skip_write_ref;
		if (read_ref_full(e->name, RESOLVE_REF_READING, &oid, &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;
			goto skip_write_ref;
		}

		/*
		 * 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);
			goto skip_write_ref;
		}
		/*
		 * 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 (!oideq(&oid, &e->item->oid)) {
			/*
			 * 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(revs->repo, &oid);
			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_or_die(&oid, e->name);
				obj->flags |= SHOWN;
				add_pending_object(revs, obj, e->name);
			}
			goto skip_write_ref;
		}

		ref_count++;
		write_or_die(bundle_fd, oid_to_hex(&e->item->oid), the_hash_algo->hexsz);
		write_or_die(bundle_fd, " ", 1);
		write_or_die(bundle_fd, display_ref, strlen(display_ref));
		write_or_die(bundle_fd, "\n", 1);
 skip_write_ref:
		free(ref);
	}

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

int create_bundle(struct repository *r, const char *path,
		  int argc, const char **argv, struct strvec *pack_options, int version)
{
	struct lock_file lock = LOCK_INIT;
	int bundle_fd = -1;
	int bundle_to_stdout;
	int ref_count = 0;
	struct rev_info revs;
	int min_version = the_hash_algo == &hash_algos[GIT_HASH_SHA1] ? 2 : 3;

	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);

	if (version == -1)
		version = min_version;

	if (version < 2 || version > 3) {
		die(_("unsupported bundle version %d"), version);
	} else if (version < min_version) {
		die(_("cannot write bundle version %d with algorithm %s"), version, the_hash_algo->name);
	} else if (version == 2) {
		write_or_die(bundle_fd, v2_bundle_signature, strlen(v2_bundle_signature));
	} else {
		const char *capability = "@object-format=";
		write_or_die(bundle_fd, v3_bundle_signature, strlen(v3_bundle_signature));
		write_or_die(bundle_fd, capability, strlen(capability));
		write_or_die(bundle_fd, the_hash_algo->name, strlen(the_hash_algo->name));
		write_or_die(bundle_fd, "\n", 1);
	}

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

	/* write prerequisites */
	if (compute_and_write_prerequisites(bundle_fd, &revs, argc, argv))
		goto err;

	argc = setup_revisions(argc, argv, &revs, NULL);

	if (argc > 1) {
		error(_("unrecognized argument: %s"), argv[1]);
		goto err;
	}

	object_array_remove_duplicates(&revs.pending);

	ref_count = write_bundle_refs(bundle_fd, &revs);
	if (!ref_count)
		die(_("Refusing to create empty bundle."));
	else if (ref_count < 0)
		goto err;

	/* write pack */
	if (write_pack_data(bundle_fd, &revs, pack_options))
		goto err;

	if (!bundle_to_stdout) {
		if (commit_lock_file(&lock))
			die_errno(_("cannot create '%s'"), path);
	}
	return 0;
err:
	rollback_lock_file(&lock);
	return -1;
}

int unbundle(struct repository *r, 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 = CHILD_PROCESS_INIT;

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

	if (verify_bundle(r, header, 0))
		return -1;
	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	1	#include "cache.h"
697cc8ef	2	#include "lockfile.h"
30415d50	3	#include "bundle.h"
cbd53a21	4	#include "object-store.h"
109cd76d	5	#include "repository.h"
30415d50 JS	6	#include "object.h"
	7	#include "commit.h"
	8	#include "diff.h"
	9	#include "revision.h"
	10	#include "list-objects.h"
	11	#include "run-command.h"
fa303836	12	#include "refs.h"
dbbcd44f	13	#include "strvec.h"
30415d50	14
c5aecfc8	15
	16	static const char v2_bundle_signature[] = "# v2 git bundle\n";
	17	static const char v3_bundle_signature[] = "# v3 git bundle\n";
	18	static struct {
	19	int version;
	20	const char *signature;
	21	} bundle_sigs[] = {
	22	{ 2, v2_bundle_signature },
	23	{ 3, v3_bundle_signature },
	24	};
30415d50	25
b8607f35	26	static void add_to_ref_list(const struct object_id oid, const char name,
30415d50 JS	27	struct ref_list *list)
30415d50 JS	28	{
5cbbe13a	29	ALLOC_GROW(list->list, list->nr + 1, list->alloc);
b8607f35	30	oidcpy(&list->list[list->nr].oid, oid);
30415d50 JS	31	list->list[list->nr].name = xstrdup(name);
	32	list->nr++;
	33	}
	34
c5aecfc8	35	static int parse_capability(struct bundle_header header, const char capability)
6161ce7b	36	{
c5aecfc8	37	const char *arg;
	38	if (skip_prefix(capability, "object-format=", &arg)) {
	39	int algo = hash_algo_by_name(arg);
	40	if (algo == GIT_HASH_UNKNOWN)
	41	return error(_("unrecognized bundle hash algorithm: %s"), arg);
	42	header->hash_algo = &hash_algos[algo];
	43	return 0;
	44	}
	45	return error(_("unknown capability '%s'"), capability);
	46	}
6161ce7b	47
c5aecfc8	48	static int parse_bundle_signature(struct bundle_header header, const char line)
	49	{
	50	int i;
	51
	52	for (i = 0; i < ARRAY_SIZE(bundle_sigs); i++) {
	53	if (!strcmp(line, bundle_sigs[i].signature)) {
	54	header->version = bundle_sigs[i].version;
	55	return 0;
	56	}
	57	}
	58	return -1;
6161ce7b	59	}
6161ce7b	60
2727b71f JH	61	static int parse_bundle_header(int fd, struct bundle_header *header,
2727b71f JH	62	const char *report_path)
f3fa1838	63	{
e9ee84cf	64	struct strbuf buf = STRBUF_INIT;
e9ee84cf	65	int status = 0;
30415d50	66
e9ee84cf	67	/* The bundle header begins with the signature */
5e8617f5	68	if (strbuf_getwholeline_fd(&buf, fd, '\n') \|\|
c5aecfc8	69	parse_bundle_signature(header, buf.buf)) {
2727b71f	70	if (report_path)
c5aecfc8	71	error(_("'%s' does not look like a v2 or v3 bundle file"),
2727b71f	72	report_path);
e9ee84cf JH	73	status = -1;
e9ee84cf JH	74	goto abort;
30415d50	75	}
e9ee84cf	76
c5aecfc8	77	header->hash_algo = the_hash_algo;
c5aecfc8	78
e9ee84cf	79	/* The bundle header ends with an empty line */
5e8617f5	80	while (!strbuf_getwholeline_fd(&buf, fd, '\n') &&
e9ee84cf	81	buf.len && buf.buf[0] != '\n') {
b8607f35	82	struct object_id oid;
e9ee84cf	83	int is_prereq = 0;
b8607f35	84	const char *p;
e9ee84cf	85
e9ee84cf	86	strbuf_rtrim(&buf);
30415d50	87
c5aecfc8	88	if (header->version == 3 && *buf.buf == '@') {
c5aecfc8	89	if (parse_capability(header, buf.buf + 1)) {
6161ce7b	90	status = -1;
	91	break;
	92	}
c5aecfc8	93	continue;
	94	}
	95
	96	if (*buf.buf == '-') {
	97	is_prereq = 1;
	98	strbuf_remove(&buf, 0, 1);
6161ce7b	99	}
6161ce7b	100
e9ee84cf JH	101	/*
	102	* Tip lines have object name, SP, and refname.
	103	* Prerequisites have object name that is optionally
	104	* followed by SP and subject line.
	105	*/
6161ce7b	106	if (parse_oid_hex_algop(buf.buf, &oid, &p, header->hash_algo) \|\|
b8607f35	107	(p && !isspace(p)) \|\|
b8607f35	108	(!is_prereq && !*p)) {
2727b71f	109	if (report_path)
8a1e7eac	110	error(_("unrecognized header: %s%s (%d)"),
2727b71f	111	(is_prereq ? "-" : ""), buf.buf, (int)buf.len);
e9ee84cf JH	112	status = -1;
	113	break;
	114	} else {
	115	if (is_prereq)
b8607f35	116	add_to_ref_list(&oid, "", &header->prerequisites);
e9ee84cf	117	else
b8607f35	118	add_to_ref_list(&oid, p + 1, &header->references);
30415d50	119	}
30415d50	120	}
e9ee84cf JH	121
	122	abort:
	123	if (status) {
	124	close(fd);
	125	fd = -1;
30415d50	126	}
e9ee84cf	127	strbuf_release(&buf);
30415d50 JS	128	return fd;
	129	}
	130
2727b71f JH	131	int read_bundle_header(const char path, struct bundle_header header)
	132	{
	133	int fd = open(path, O_RDONLY);
	134
30415d50	135	if (fd < 0)
8a1e7eac	136	return error(_("could not open '%s'"), path);
2727b71f JH	137	return parse_bundle_header(fd, header, path);
	138	}
	139
	140	int is_bundle(const char *path, int quiet)
	141	{
	142	struct bundle_header header;
	143	int fd = open(path, O_RDONLY);
	144
	145	if (fd < 0)
	146	return 0;
	147	memset(&header, 0, sizeof(header));
	148	fd = parse_bundle_header(fd, &header, quiet ? NULL : path);
	149	if (fd >= 0)
	150	close(fd);
	151	return (fd >= 0);
30415d50 JS	152	}
	153
	154	static int list_refs(struct ref_list r, int argc, const char *argv)
	155	{
	156	int i;
	157
	158	for (i = 0; i < r->nr; i++) {
	159	if (argc > 1) {
	160	int j;
	161	for (j = 1; j < argc; j++)
	162	if (!strcmp(r->list[i].name, argv[j]))
	163	break;
	164	if (j == argc)
	165	continue;
	166	}
b8607f35	167	printf("%s %s\n", oid_to_hex(&r->list[i].oid),
30415d50 JS	168	r->list[i].name);
	169	}
	170	return 0;
	171	}
	172
208acbfb	173	/* Remember to update object flag allocation in object.h */
30415d50 JS	174	#define PREREQ_MARK (1u<<16)
30415d50 JS	175
74ae4b63 NTND	176	int verify_bundle(struct repository *r,
	177	struct bundle_header *header,
	178	int verbose)
30415d50 JS	179	{
	180	/*
	181	* Do fast check, then if any prereqs are missing then go line by line
	182	* to be verbose about the errors
	183	*/
	184	struct ref_list *p = &header->prerequisites;
	185	struct rev_info revs;
a80aad7b	186	const char *argv[] = {NULL, "--all", NULL};
30415d50 JS	187	struct commit *commit;
30415d50 JS	188	int i, ret = 0, req_nr;
8a1e7eac	189	const char *message = _("Repository lacks these prerequisite commits:");
30415d50	190
3bbbe467 JS	191	if (!r \|\| !r->objects \|\| !r->objects->odb)
	192	return error(_("need a repository to verify a bundle"));
	193
74ae4b63	194	repo_init_revisions(r, &revs, NULL);
30415d50 JS	195	for (i = 0; i < p->nr; i++) {
30415d50 JS	196	struct ref_list_entry *e = p->list + i;
74ae4b63	197	struct object *o = parse_object(r, &e->oid);
30415d50 JS	198	if (o) {
	199	o->flags \|= PREREQ_MARK;
	200	add_pending_object(&revs, o, e->name);
	201	continue;
	202	}
	203	if (++ret == 1)
9db56f71	204	error("%s", message);
b8607f35	205	error("%s %s", oid_to_hex(&e->oid), e->name);
30415d50 JS	206	}
	207	if (revs.pending.nr != p->nr)
	208	return ret;
	209	req_nr = revs.pending.nr;
	210	setup_revisions(2, argv, &revs, NULL);
	211
3d51e1b5	212	if (prepare_revision_walk(&revs))
8a1e7eac	213	die(_("revision walk setup failed"));
30415d50 JS	214
	215	i = req_nr;
	216	while (i && (commit = get_revision(&revs)))
	217	if (commit->object.flags & PREREQ_MARK)
	218	i--;
	219
63647391 RS	220	for (i = 0; i < p->nr; i++) {
63647391 RS	221	struct ref_list_entry *e = p->list + i;
74ae4b63	222	struct object *o = parse_object(r, &e->oid);
63647391 RS	223	assert(o); /* otherwise we'd have returned early */
	224	if (o->flags & SHOWN)
	225	continue;
	226	if (++ret == 1)
	227	error("%s", message);
	228	error("%s %s", oid_to_hex(&e->oid), e->name);
	229	}
30415d50	230
b2ccdf7f	231	/* Clean up objects used, as they will be reused. */
63647391 RS	232	for (i = 0; i < p->nr; i++) {
63647391 RS	233	struct ref_list_entry *e = p->list + i;
74ae4b63	234	commit = lookup_commit_reference_gently(r, &e->oid, 1);
63647391 RS	235	if (commit)
	236	clear_commit_marks(commit, ALL_REV_FLAGS);
	237	}
30415d50 JS	238
	239	if (verbose) {
	240	struct ref_list *r;
	241
	242	r = &header->references;
a02ffe0e LF	243	printf_ln(Q_("The bundle contains this ref:",
a02ffe0e LF	244	"The bundle contains these %d refs:",
8a1e7eac NTND	245	r->nr),
8a1e7eac NTND	246	r->nr);
30415d50	247	list_refs(r, 0, NULL);
71ba6b10	248	r = &header->prerequisites;
8c3710fd JH	249	if (!r->nr) {
	250	printf_ln(_("The bundle records a complete history."));
	251	} else {
a02ffe0e LF	252	printf_ln(Q_("The bundle requires this ref:",
a02ffe0e LF	253	"The bundle requires these %d refs:",
8c3710fd JH	254	r->nr),
	255	r->nr);
	256	list_refs(r, 0, NULL);
	257	}
30415d50 JS	258	}
	259	return ret;
	260	}
	261
	262	int list_bundle_refs(struct bundle_header header, int argc, const char *argv)
	263	{
	264	return list_refs(&header->references, argc, argv);
	265	}
	266
c9a42c4a JS	267	static int is_tag_in_date_range(struct object tag, struct rev_info revs)
	268	{
	269	unsigned long size;
	270	enum object_type type;
64045940	271	char buf = NULL, line, *lineend;
dddbad72	272	timestamp_t date;
64045940	273	int result = 1;
c9a42c4a JS	274
c9a42c4a JS	275	if (revs->max_age == -1 && revs->min_age == -1)
64045940	276	goto out;
c9a42c4a	277
b4f5aca4	278	buf = read_object_file(&tag->oid, &type, &size);
c9a42c4a	279	if (!buf)
64045940	280	goto out;
c9a42c4a JS	281	line = memmem(buf, size, "\ntagger ", 8);
c9a42c4a JS	282	if (!line++)
64045940	283	goto out;
2c8544ab LF	284	lineend = memchr(line, '\n', buf + size - line);
2c8544ab LF	285	line = memchr(line, '>', lineend ? lineend - line : buf + size - line);
c9a42c4a	286	if (!line++)
64045940	287	goto out;
1aeb7e75	288	date = parse_timestamp(line, NULL, 10);
64045940	289	result = (revs->max_age == -1 \|\| revs->max_age < date) &&
c9a42c4a	290	(revs->min_age == -1 \|\| revs->min_age > date);
64045940 RS	291	out:
	292	free(buf);
	293	return result;
c9a42c4a JS	294	}
c9a42c4a JS	295
e54c347c	296
2c8ee1f5	297	/* Write the pack data to bundle_fd */
ef8d7ac4	298	static int write_pack_data(int bundle_fd, struct rev_info revs, struct strvec pack_options)
5e626b91 JH	299	{
	300	struct child_process pack_objects = CHILD_PROCESS_INIT;
	301	int i;
	302
ef8d7ac4	303	strvec_pushl(&pack_objects.args,
f6d8942b JK	304	"pack-objects",
	305	"--stdout", "--thin", "--delta-base-offset",
	306	NULL);
d70a9eb6	307	strvec_pushv(&pack_objects.args, pack_options->v);
5e626b91 JH	308	pack_objects.in = -1;
	309	pack_objects.out = bundle_fd;
	310	pack_objects.git_cmd = 1;
2c8ee1f5 JK	311
	312	/*
	313	* start_command() will close our descriptor if it's >1. Duplicate it
	314	* to avoid surprising the caller.
	315	*/
	316	if (pack_objects.out > 1) {
	317	pack_objects.out = dup(pack_objects.out);
	318	if (pack_objects.out < 0) {
	319	error_errno(_("unable to dup bundle descriptor"));
	320	child_process_clear(&pack_objects);
	321	return -1;
	322	}
	323	}
	324
5e626b91 JH	325	if (start_command(&pack_objects))
	326	return error(_("Could not spawn pack-objects"));
	327
5e626b91 JH	328	for (i = 0; i < revs->pending.nr; i++) {
	329	struct object *object = revs->pending.objects[i].item;
	330	if (object->flags & UNINTERESTING)
	331	write_or_die(pack_objects.in, "^", 1);
703d2d41	332	write_or_die(pack_objects.in, oid_to_hex(&object->oid), the_hash_algo->hexsz);
5e626b91 JH	333	write_or_die(pack_objects.in, "\n", 1);
	334	}
	335	close(pack_objects.in);
	336	if (finish_command(&pack_objects))
	337	return error(_("pack-objects died"));
	338	return 0;
	339	}
	340
e8eb2512 JH	341	static int compute_and_write_prerequisites(int bundle_fd,
	342	struct rev_info *revs,
	343	int argc, const char **argv)
30415d50	344	{
d3180279	345	struct child_process rls = CHILD_PROCESS_INIT;
e8eb2512	346	struct strbuf buf = STRBUF_INIT;
30415d50	347	FILE *rls_fout;
e8eb2512	348	int i;
30415d50	349
ef8d7ac4	350	strvec_pushl(&rls.args,
f6d8942b JK	351	"rev-list", "--boundary", "--pretty=oneline",
f6d8942b JK	352	NULL);
1e2371ea	353	for (i = 1; i < argc; i++)
ef8d7ac4	354	strvec_push(&rls.args, argv[i]);
30415d50 JS	355	rls.out = -1;
	356	rls.git_cmd = 1;
	357	if (start_command(&rls))
	358	return -1;
41698375	359	rls_fout = xfdopen(rls.out, "r");
bc2fed49	360	while (strbuf_getwholeline(&buf, rls_fout, '\n') != EOF) {
b8607f35	361	struct object_id oid;
bc2fed49 TR	362	if (buf.len > 0 && buf.buf[0] == '-') {
bc2fed49 TR	363	write_or_die(bundle_fd, buf.buf, buf.len);
b8607f35	364	if (!get_oid_hex(buf.buf + 1, &oid)) {
c251c83d	365	struct object *object = parse_object_or_die(&oid,
c251c83d	366	buf.buf);
30415d50	367	object->flags \|= UNINTERESTING;
e8eb2512	368	add_pending_object(revs, object, buf.buf);
30415d50	369	}
b8607f35	370	} else if (!get_oid_hex(buf.buf, &oid)) {
c251c83d	371	struct object *object = parse_object_or_die(&oid,
c251c83d	372	buf.buf);
30415d50 JS	373	object->flags \|= SHOWN;
	374	}
	375	}
bc2fed49	376	strbuf_release(&buf);
30415d50 JS	377	fclose(rls_fout);
30415d50 JS	378	if (finish_command(&rls))
8a1e7eac	379	return error(_("rev-list died"));
e8eb2512 JH	380	return 0;
	381	}
	382
d9362ef9 JK	383	/*
	384	* Write out bundle refs based on the tips already
	385	* parsed into revs.pending. As a side effect, may
	386	* manipulate revs.pending to include additional
	387	* necessary objects (like tags).
	388	*
	389	* Returns the number of refs written, or negative
	390	* on error.
	391	*/
	392	static int write_bundle_refs(int bundle_fd, struct rev_info *revs)
e8eb2512	393	{
d9362ef9 JK	394	int i;
d9362ef9 JK	395	int ref_count = 0;
b2a6d1c6	396
d9362ef9 JK	397	for (i = 0; i < revs->pending.nr; i++) {
d9362ef9 JK	398	struct object_array_entry *e = revs->pending.objects + i;
f2fd0760	399	struct object_id oid;
30415d50	400	char *ref;
fa303836 JH	401	const char *display_ref;
fa303836 JH	402	int flag;
30415d50 JS	403
	404	if (e->item->flags & UNINTERESTING)
	405	continue;
f24c30e0	406	if (dwim_ref(e->name, strlen(e->name), &oid, &ref, 0) != 1)
c8a571d8	407	goto skip_write_ref;
34c290a6	408	if (read_ref_full(e->name, RESOLVE_REF_READING, &oid, &flag))
fa303836 JH	409	flag = 0;
	410	display_ref = (flag & REF_ISSYMREF) ? e->name : ref;
	411
c9a42c4a	412	if (e->item->type == OBJ_TAG &&
d9362ef9	413	!is_tag_in_date_range(e->item, revs)) {
c9a42c4a	414	e->item->flags \|= UNINTERESTING;
c8a571d8	415	goto skip_write_ref;
c9a42c4a JS	416	}
c9a42c4a JS	417
30415d50 JS	418	/*
	419	* Make sure the refs we wrote out is correct; --max-count and
	420	* other limiting options could have prevented all the tips
	421	* from getting output.
	422	*
	423	* Non commit objects such as tags and blobs do not have
	424	* this issue as they are not affected by those extra
	425	* constraints.
	426	*/
	427	if (!(e->item->flags & SHOWN) && e->item->type == OBJ_COMMIT) {
8a1e7eac	428	warning(_("ref '%s' is excluded by the rev-list options"),
30415d50	429	e->name);
c8a571d8	430	goto skip_write_ref;
30415d50 JS	431	}
	432	/*
	433	* If you run "git bundle create bndl v1.0..v2.0", the
	434	* name of the positive ref is "v2.0" but that is the
	435	* commit that is referenced by the tag, and not the tag
	436	* itself.
	437	*/
9001dc2a	438	if (!oideq(&oid, &e->item->oid)) {
30415d50 JS	439	/*
	440	* Is this the positive end of a range expressed
	441	* in terms of a tag (e.g. v2.0 from the range
	442	* "v1.0..v2.0")?
	443	*/
74ae4b63	444	struct commit *one = lookup_commit_reference(revs->repo, &oid);
30415d50 JS	445	struct object *obj;
	446
	447	if (e->item == &(one->object)) {
	448	/*
	449	* Need to include e->name as an
	450	* independent ref to the pack-objects
	451	* input, so that the tag is included
	452	* in the output; otherwise we would
	453	* end up triggering "empty bundle"
	454	* error.
	455	*/
c251c83d	456	obj = parse_object_or_die(&oid, e->name);
30415d50	457	obj->flags \|= SHOWN;
d9362ef9	458	add_pending_object(revs, obj, e->name);
30415d50	459	}
c8a571d8	460	goto skip_write_ref;
30415d50 JS	461	}
	462
	463	ref_count++;
703d2d41	464	write_or_die(bundle_fd, oid_to_hex(&e->item->oid), the_hash_algo->hexsz);
30415d50	465	write_or_die(bundle_fd, " ", 1);
fa303836	466	write_or_die(bundle_fd, display_ref, strlen(display_ref));
30415d50	467	write_or_die(bundle_fd, "\n", 1);
c8a571d8	468	skip_write_ref:
30415d50 JS	469	free(ref);
30415d50 JS	470	}
30415d50 JS	471
	472	/* end header */
	473	write_or_die(bundle_fd, "\n", 1);
d9362ef9 JK	474	return ref_count;
	475	}
	476
fcb133e9	477	int create_bundle(struct repository r, const char path,
e0ad9574	478	int argc, const char *argv, struct strvec pack_options, int version)
d9362ef9	479	{
b2275868	480	struct lock_file lock = LOCK_INIT;
d9362ef9 JK	481	int bundle_fd = -1;
	482	int bundle_to_stdout;
	483	int ref_count = 0;
	484	struct rev_info revs;
c5aecfc8	485	int min_version = the_hash_algo == &hash_algos[GIT_HASH_SHA1] ? 2 : 3;
d9362ef9 JK	486
	487	bundle_to_stdout = !strcmp(path, "-");
	488	if (bundle_to_stdout)
	489	bundle_fd = 1;
2c8ee1f5	490	else
d9362ef9 JK	491	bundle_fd = hold_lock_file_for_update(&lock, path,
	492	LOCK_DIE_ON_ERROR);
	493
c5aecfc8	494	if (version == -1)
	495	version = min_version;
	496
	497	if (version < 2 \|\| version > 3) {
	498	die(_("unsupported bundle version %d"), version);
	499	} else if (version < min_version) {
	500	die(_("cannot write bundle version %d with algorithm %s"), version, the_hash_algo->name);
	501	} else if (version == 2) {
	502	write_or_die(bundle_fd, v2_bundle_signature, strlen(v2_bundle_signature));
	503	} else {
	504	const char *capability = "@object-format=";
	505	write_or_die(bundle_fd, v3_bundle_signature, strlen(v3_bundle_signature));
	506	write_or_die(bundle_fd, capability, strlen(capability));
	507	write_or_die(bundle_fd, the_hash_algo->name, strlen(the_hash_algo->name));
	508	write_or_die(bundle_fd, "\n", 1);
	509	}
d9362ef9 JK	510
	511	/* init revs to list objects for pack-objects later */
	512	save_commit_buffer = 0;
74ae4b63	513	repo_init_revisions(r, &revs, NULL);
d9362ef9 JK	514
	515	/* write prerequisites */
	516	if (compute_and_write_prerequisites(bundle_fd, &revs, argc, argv))
f5ff5fb5	517	goto err;
d9362ef9 JK	518
	519	argc = setup_revisions(argc, argv, &revs, NULL);
	520
f5ff5fb5 SB	521	if (argc > 1) {
	522	error(_("unrecognized argument: %s"), argv[1]);
	523	goto err;
	524	}
d9362ef9 JK	525
	526	object_array_remove_duplicates(&revs.pending);
	527
	528	ref_count = write_bundle_refs(bundle_fd, &revs);
	529	if (!ref_count)
	530	die(_("Refusing to create empty bundle."));
	531	else if (ref_count < 0)
f5ff5fb5	532	goto err;
30415d50 JS	533
30415d50 JS	534	/* write pack */
79862b6b	535	if (write_pack_data(bundle_fd, &revs, pack_options))
f5ff5fb5	536	goto err;
4ed7cd3a	537
0f5cdf65 CH	538	if (!bundle_to_stdout) {
0f5cdf65 CH	539	if (commit_lock_file(&lock))
8a1e7eac	540	die_errno(_("cannot create '%s'"), path);
0f5cdf65	541	}
c20181e3	542	return 0;
f5ff5fb5	543	err:
2c8ee1f5	544	rollback_lock_file(&lock);
f5ff5fb5	545	return -1;
30415d50 JS	546	}
30415d50 JS	547
74ae4b63 NTND	548	int unbundle(struct repository r, struct bundle_header header,
74ae4b63 NTND	549	int bundle_fd, int flags)
30415d50 JS	550	{
30415d50 JS	551	const char *argv_index_pack[] = {"index-pack",
be042aff	552	"--fix-thin", "--stdin", NULL, NULL};
d3180279	553	struct child_process ip = CHILD_PROCESS_INIT;
30415d50	554
be042aff JH	555	if (flags & BUNDLE_VERBOSE)
	556	argv_index_pack[3] = "-v";
	557
74ae4b63	558	if (verify_bundle(r, header, 0))
30415d50	559	return -1;
30415d50 JS	560	ip.argv = argv_index_pack;
	561	ip.in = bundle_fd;
	562	ip.no_stdout = 1;
	563	ip.git_cmd = 1;
	564	if (run_command(&ip))
8a1e7eac	565	return error(_("index-pack died"));
30415d50 JS	566	return 0;
30415d50 JS	567	}