[thirdparty/git.git] / archive.c

#include "cache.h"
#include "commit.h"
#include "tree-walk.h"
#include "attr.h"
#include "archive.h"
#include "parse-options.h"
#include "unpack-trees.h"

static char const * const archive_usage[] = {
	"git archive [options] <tree-ish> [path...]",
	"git archive --list",
	"git archive --remote <repo> [--exec <cmd>] [options] <tree-ish> [path...]",
	"git archive --remote <repo> [--exec <cmd>] --list",
	NULL
};

#define USES_ZLIB_COMPRESSION 1

static const struct archiver {
	const char *name;
	write_archive_fn_t write_archive;
	unsigned int flags;
} archivers[] = {
	{ "tar", write_tar_archive },
	{ "zip", write_zip_archive, USES_ZLIB_COMPRESSION },
};

static void format_subst(const struct commit *commit,
                         const char *src, size_t len,
                         struct strbuf *buf)
{
	char *to_free = NULL;
	struct strbuf fmt = STRBUF_INIT;
	struct pretty_print_context ctx = {0};
	ctx.date_mode = DATE_NORMAL;

	if (src == buf->buf)
		to_free = strbuf_detach(buf, NULL);
	for (;;) {
		const char *b, *c;

		b = memmem(src, len, "$Format:", 8);
		if (!b)
			break;
		c = memchr(b + 8, '$', (src + len) - b - 8);
		if (!c)
			break;

		strbuf_reset(&fmt);
		strbuf_add(&fmt, b + 8, c - b - 8);

		strbuf_add(buf, src, b - src);
		format_commit_message(commit, fmt.buf, buf, &ctx);
		len -= c + 1 - src;
		src  = c + 1;
	}
	strbuf_add(buf, src, len);
	strbuf_release(&fmt);
	free(to_free);
}

static void *sha1_file_to_archive(const char *path, const unsigned char *sha1,
		unsigned int mode, enum object_type *type,
		unsigned long *sizep, const struct commit *commit)
{
	void *buffer;

	buffer = read_sha1_file(sha1, type, sizep);
	if (buffer && S_ISREG(mode)) {
		struct strbuf buf = STRBUF_INIT;
		size_t size = 0;

		strbuf_attach(&buf, buffer, *sizep, *sizep + 1);
		convert_to_working_tree(path, buf.buf, buf.len, &buf);
		if (commit)
			format_subst(commit, buf.buf, buf.len, &buf);
		buffer = strbuf_detach(&buf, &size);
		*sizep = size;
	}

	return buffer;
}

static void setup_archive_check(struct git_attr_check *check)
{
	static struct git_attr *attr_export_ignore;
	static struct git_attr *attr_export_subst;

	if (!attr_export_ignore) {
		attr_export_ignore = git_attr("export-ignore");
		attr_export_subst = git_attr("export-subst");
	}
	check[0].attr = attr_export_ignore;
	check[1].attr = attr_export_subst;
}

struct archiver_context {
	struct archiver_args *args;
	write_archive_entry_fn_t write_entry;
};

static int write_archive_entry(const unsigned char *sha1, const char *base,
		int baselen, const char *filename, unsigned mode, int stage,
		void *context)
{
	static struct strbuf path = STRBUF_INIT;
	struct archiver_context *c = context;
	struct archiver_args *args = c->args;
	write_archive_entry_fn_t write_entry = c->write_entry;
	struct git_attr_check check[2];
	const char *path_without_prefix;
	int convert = 0;
	int err;
	enum object_type type;
	unsigned long size;
	void *buffer;

	strbuf_reset(&path);
	strbuf_grow(&path, PATH_MAX);
	strbuf_add(&path, args->base, args->baselen);
	strbuf_add(&path, base, baselen);
	strbuf_addstr(&path, filename);
	path_without_prefix = path.buf + args->baselen;

	setup_archive_check(check);
	if (!git_checkattr(path_without_prefix, ARRAY_SIZE(check), check)) {
		if (ATTR_TRUE(check[0].value))
			return 0;
		convert = ATTR_TRUE(check[1].value);
	}

	if (S_ISDIR(mode) || S_ISGITLINK(mode)) {
		strbuf_addch(&path, '/');
		if (args->verbose)
			fprintf(stderr, "%.*s\n", (int)path.len, path.buf);
		err = write_entry(args, sha1, path.buf, path.len, mode, NULL, 0);
		if (err)
			return err;
		return (S_ISDIR(mode) ? READ_TREE_RECURSIVE : 0);
	}

	buffer = sha1_file_to_archive(path_without_prefix, sha1, mode,
			&type, &size, convert ? args->commit : NULL);
	if (!buffer)
		return error("cannot read %s", sha1_to_hex(sha1));
	if (args->verbose)
		fprintf(stderr, "%.*s\n", (int)path.len, path.buf);
	err = write_entry(args, sha1, path.buf, path.len, mode, buffer, size);
	free(buffer);
	return err;
}

int write_archive_entries(struct archiver_args *args,
		write_archive_entry_fn_t write_entry)
{
	struct archiver_context context;
	struct unpack_trees_options opts;
	struct tree_desc t;
	int err;

	if (args->baselen > 0 && args->base[args->baselen - 1] == '/') {
		size_t len = args->baselen;

		while (len > 1 && args->base[len - 2] == '/')
			len--;
		if (args->verbose)
			fprintf(stderr, "%.*s\n", (int)len, args->base);
		err = write_entry(args, args->tree->object.sha1, args->base,
				len, 040777, NULL, 0);
		if (err)
			return err;
	}

	context.args = args;
	context.write_entry = write_entry;

	/*
	 * Setup index and instruct attr to read index only
	 */
	if (!args->worktree_attributes) {
		memset(&opts, 0, sizeof(opts));
		opts.index_only = 1;
		opts.head_idx = -1;
		opts.src_index = &the_index;
		opts.dst_index = &the_index;
		opts.fn = oneway_merge;
		init_tree_desc(&t, args->tree->buffer, args->tree->size);
		if (unpack_trees(1, &t, &opts))
			return -1;
		git_attr_set_direction(GIT_ATTR_INDEX, &the_index);
	}

	err = read_tree_recursive(args->tree, "", 0, 0, args->pathspec,
				  write_archive_entry, &context);
	if (err == READ_TREE_RECURSIVE)
		err = 0;
	return err;
}

static const struct archiver *lookup_archiver(const char *name)
{
	int i;

	if (!name)
		return NULL;

	for (i = 0; i < ARRAY_SIZE(archivers); i++) {
		if (!strcmp(name, archivers[i].name))
			return &archivers[i];
	}
	return NULL;
}

static int reject_entry(const unsigned char *sha1, const char *base,
			int baselen, const char *filename, unsigned mode,
			int stage, void *context)
{
	return -1;
}

static int path_exists(struct tree *tree, const char *path)
{
	const char *pathspec[] = { path, NULL };

	if (read_tree_recursive(tree, "", 0, 0, pathspec, reject_entry, NULL))
		return 1;
	return 0;
}

static void parse_pathspec_arg(const char **pathspec,
		struct archiver_args *ar_args)
{
	ar_args->pathspec = pathspec = get_pathspec("", pathspec);
	if (pathspec) {
		while (*pathspec) {
			if (!path_exists(ar_args->tree, *pathspec))
				die("path not found: %s", *pathspec);
			pathspec++;
		}
	}
}

static void parse_treeish_arg(const char **argv,
		struct archiver_args *ar_args, const char *prefix)
{
	const char *name = argv[0];
	const unsigned char *commit_sha1;
	time_t archive_time;
	struct tree *tree;
	const struct commit *commit;
	unsigned char sha1[20];

	if (get_sha1(name, sha1))
		die("Not a valid object name");

	commit = lookup_commit_reference_gently(sha1, 1);
	if (commit) {
		commit_sha1 = commit->object.sha1;
		archive_time = commit->date;
	} else {
		commit_sha1 = NULL;
		archive_time = time(NULL);
	}

	tree = parse_tree_indirect(sha1);
	if (tree == NULL)
		die("not a tree object");

	if (prefix) {
		unsigned char tree_sha1[20];
		unsigned int mode;
		int err;

		err = get_tree_entry(tree->object.sha1, prefix,
				     tree_sha1, &mode);
		if (err || !S_ISDIR(mode))
			die("current working directory is untracked");

		tree = parse_tree_indirect(tree_sha1);
	}
	ar_args->tree = tree;
	ar_args->commit_sha1 = commit_sha1;
	ar_args->commit = commit;
	ar_args->time = archive_time;
}

#define OPT__COMPR(s, v, h, p) \
	{ OPTION_SET_INT, (s), NULL, (v), NULL, (h), \
	  PARSE_OPT_NOARG | PARSE_OPT_NONEG, NULL, (p) }
#define OPT__COMPR_HIDDEN(s, v, p) \
	{ OPTION_SET_INT, (s), NULL, (v), NULL, "", \
	  PARSE_OPT_NOARG | PARSE_OPT_NONEG | PARSE_OPT_HIDDEN, NULL, (p) }

static int parse_archive_args(int argc, const char **argv,
		const struct archiver **ar, struct archiver_args *args)
{
	const char *format = "tar";
	const char *base = NULL;
	const char *remote = NULL;
	const char *exec = NULL;
	const char *output = NULL;
	int compression_level = -1;
	int verbose = 0;
	int i;
	int list = 0;
	int worktree_attributes = 0;
	struct option opts[] = {
		OPT_GROUP(""),
		OPT_STRING(0, "format", &format, "fmt", "archive format"),
		OPT_STRING(0, "prefix", &base, "prefix",
			"prepend prefix to each pathname in the archive"),
		OPT_STRING('o', "output", &output, "file",
			"write the archive to this file"),
		OPT_BOOLEAN(0, "worktree-attributes", &worktree_attributes,
			"read .gitattributes in working directory"),
		OPT__VERBOSE(&verbose),
		OPT__COMPR('0', &compression_level, "store only", 0),
		OPT__COMPR('1', &compression_level, "compress faster", 1),
		OPT__COMPR_HIDDEN('2', &compression_level, 2),
		OPT__COMPR_HIDDEN('3', &compression_level, 3),
		OPT__COMPR_HIDDEN('4', &compression_level, 4),
		OPT__COMPR_HIDDEN('5', &compression_level, 5),
		OPT__COMPR_HIDDEN('6', &compression_level, 6),
		OPT__COMPR_HIDDEN('7', &compression_level, 7),
		OPT__COMPR_HIDDEN('8', &compression_level, 8),
		OPT__COMPR('9', &compression_level, "compress better", 9),
		OPT_GROUP(""),
		OPT_BOOLEAN('l', "list", &list,
			"list supported archive formats"),
		OPT_GROUP(""),
		OPT_STRING(0, "remote", &remote, "repo",
			"retrieve the archive from remote repository <repo>"),
		OPT_STRING(0, "exec", &exec, "cmd",
			"path to the remote git-upload-archive command"),
		OPT_END()
	};

	argc = parse_options(argc, argv, NULL, opts, archive_usage, 0);

	if (remote)
		die("Unexpected option --remote");
	if (exec)
		die("Option --exec can only be used together with --remote");
	if (output)
		die("Unexpected option --output");

	if (!base)
		base = "";

	if (list) {
		for (i = 0; i < ARRAY_SIZE(archivers); i++)
			printf("%s\n", archivers[i].name);
		exit(0);
	}

	/* We need at least one parameter -- tree-ish */
	if (argc < 1)
		usage_with_options(archive_usage, opts);
	*ar = lookup_archiver(format);
	if (!*ar)
		die("Unknown archive format '%s'", format);

	args->compression_level = Z_DEFAULT_COMPRESSION;
	if (compression_level != -1) {
		if ((*ar)->flags & USES_ZLIB_COMPRESSION)
			args->compression_level = compression_level;
		else {
			die("Argument not supported for format '%s': -%d",
					format, compression_level);
		}
	}
	args->verbose = verbose;
	args->base = base;
	args->baselen = strlen(base);
	args->worktree_attributes = worktree_attributes;

	return argc;
}

int write_archive(int argc, const char **argv, const char *prefix,
		int setup_prefix)
{
	const struct archiver *ar = NULL;
	struct archiver_args args;

	argc = parse_archive_args(argc, argv, &ar, &args);
	if (setup_prefix && prefix == NULL)
		prefix = setup_git_directory();

	parse_treeish_arg(argv, &args, prefix);
	parse_pathspec_arg(argv + 1, &args);

	git_config(git_default_config, NULL);

	return ar->write_archive(&args);
}
Commit	Line	Data
18125644 LH	1	#include "cache.h"
18125644 LH	2	#include "commit.h"
c0885435	3	#include "tree-walk.h"
18125644	4	#include "attr.h"
562e25ab	5	#include "archive.h"
4fac1d3a	6	#include "parse-options.h"
ba053ea9	7	#include "unpack-trees.h"
4fac1d3a RS	8
	9	static char const * const archive_usage[] = {
	10	"git archive [options] <tree-ish> [path...]",
	11	"git archive --list",
	12	"git archive --remote <repo> [--exec <cmd>] [options] <tree-ish> [path...]",
	13	"git archive --remote <repo> [--exec <cmd>] --list",
	14	NULL
	15	};
c0885435 RS	16
	17	#define USES_ZLIB_COMPRESSION 1
	18
120a385a	19	static const struct archiver {
f15f736d RS	20	const char *name;
	21	write_archive_fn_t write_archive;
	22	unsigned int flags;
	23	} archivers[] = {
c0885435 RS	24	{ "tar", write_tar_archive },
	25	{ "zip", write_zip_archive, USES_ZLIB_COMPRESSION },
	26	};
	27
18125644 LH	28	static void format_subst(const struct commit *commit,
	29	const char *src, size_t len,
	30	struct strbuf *buf)
	31	{
	32	char *to_free = NULL;
f285a2d7	33	struct strbuf fmt = STRBUF_INIT;
dd2e794a TR	34	struct pretty_print_context ctx = {0};
dd2e794a TR	35	ctx.date_mode = DATE_NORMAL;
18125644 LH	36
	37	if (src == buf->buf)
	38	to_free = strbuf_detach(buf, NULL);
18125644 LH	39	for (;;) {
	40	const char b, c;
	41
	42	b = memmem(src, len, "$Format:", 8);
75b7dfbd	43	if (!b)
18125644	44	break;
75b7dfbd	45	c = memchr(b + 8, '$', (src + len) - b - 8);
18125644 LH	46	if (!c)
	47	break;
	48
	49	strbuf_reset(&fmt);
	50	strbuf_add(&fmt, b + 8, c - b - 8);
	51
	52	strbuf_add(buf, src, b - src);
dd2e794a	53	format_commit_message(commit, fmt.buf, buf, &ctx);
18125644 LH	54	len -= c + 1 - src;
	55	src = c + 1;
	56	}
	57	strbuf_add(buf, src, len);
	58	strbuf_release(&fmt);
	59	free(to_free);
	60	}
	61
1d11d5bb RS	62	static void sha1_file_to_archive(const char path, const unsigned char *sha1,
	63	unsigned int mode, enum object_type *type,
	64	unsigned long sizep, const struct commit commit)
18125644 LH	65	{
	66	void *buffer;
	67
	68	buffer = read_sha1_file(sha1, type, sizep);
	69	if (buffer && S_ISREG(mode)) {
f285a2d7	70	struct strbuf buf = STRBUF_INIT;
18125644 LH	71	size_t size = 0;
18125644 LH	72
18125644 LH	73	strbuf_attach(&buf, buffer, sizep, sizep + 1);
18125644 LH	74	convert_to_working_tree(path, buf.buf, buf.len, &buf);
1d11d5bb RS	75	if (commit)
1d11d5bb RS	76	format_subst(commit, buf.buf, buf.len, &buf);
18125644 LH	77	buffer = strbuf_detach(&buf, &size);
	78	*sizep = size;
	79	}
	80
	81	return buffer;
	82	}
	83
1d11d5bb	84	static void setup_archive_check(struct git_attr_check *check)
008d896d RS	85	{
008d896d RS	86	static struct git_attr *attr_export_ignore;
1d11d5bb	87	static struct git_attr *attr_export_subst;
008d896d	88
1d11d5bb	89	if (!attr_export_ignore) {
7fb0eaa2 JH	90	attr_export_ignore = git_attr("export-ignore");
7fb0eaa2 JH	91	attr_export_subst = git_attr("export-subst");
1d11d5bb	92	}
008d896d	93	check[0].attr = attr_export_ignore;
1d11d5bb	94	check[1].attr = attr_export_subst;
008d896d	95	}
562e25ab RS	96
	97	struct archiver_context {
	98	struct archiver_args *args;
	99	write_archive_entry_fn_t write_entry;
	100	};
	101
	102	static int write_archive_entry(const unsigned char sha1, const char base,
	103	int baselen, const char *filename, unsigned mode, int stage,
	104	void *context)
	105	{
	106	static struct strbuf path = STRBUF_INIT;
	107	struct archiver_context *c = context;
	108	struct archiver_args *args = c->args;
	109	write_archive_entry_fn_t write_entry = c->write_entry;
1d11d5bb RS	110	struct git_attr_check check[2];
	111	const char *path_without_prefix;
	112	int convert = 0;
562e25ab RS	113	int err;
	114	enum object_type type;
	115	unsigned long size;
	116	void *buffer;
	117
	118	strbuf_reset(&path);
	119	strbuf_grow(&path, PATH_MAX);
ebfbdb34	120	strbuf_add(&path, args->base, args->baselen);
562e25ab RS	121	strbuf_add(&path, base, baselen);
562e25ab RS	122	strbuf_addstr(&path, filename);
1d11d5bb	123	path_without_prefix = path.buf + args->baselen;
562e25ab	124
1d11d5bb RS	125	setup_archive_check(check);
	126	if (!git_checkattr(path_without_prefix, ARRAY_SIZE(check), check)) {
	127	if (ATTR_TRUE(check[0].value))
	128	return 0;
	129	convert = ATTR_TRUE(check[1].value);
	130	}
562e25ab RS	131
	132	if (S_ISDIR(mode) \|\| S_ISGITLINK(mode)) {
	133	strbuf_addch(&path, '/');
	134	if (args->verbose)
	135	fprintf(stderr, "%.*s\n", (int)path.len, path.buf);
	136	err = write_entry(args, sha1, path.buf, path.len, mode, NULL, 0);
	137	if (err)
	138	return err;
d3bee161	139	return (S_ISDIR(mode) ? READ_TREE_RECURSIVE : 0);
562e25ab RS	140	}
562e25ab RS	141
1d11d5bb RS	142	buffer = sha1_file_to_archive(path_without_prefix, sha1, mode,
1d11d5bb RS	143	&type, &size, convert ? args->commit : NULL);
562e25ab RS	144	if (!buffer)
	145	return error("cannot read %s", sha1_to_hex(sha1));
	146	if (args->verbose)
	147	fprintf(stderr, "%.*s\n", (int)path.len, path.buf);
	148	err = write_entry(args, sha1, path.buf, path.len, mode, buffer, size);
	149	free(buffer);
	150	return err;
	151	}
	152
	153	int write_archive_entries(struct archiver_args *args,
	154	write_archive_entry_fn_t write_entry)
	155	{
	156	struct archiver_context context;
ba053ea9 NTND	157	struct unpack_trees_options opts;
ba053ea9 NTND	158	struct tree_desc t;
562e25ab RS	159	int err;
	160
	161	if (args->baselen > 0 && args->base[args->baselen - 1] == '/') {
	162	size_t len = args->baselen;
	163
	164	while (len > 1 && args->base[len - 2] == '/')
	165	len--;
	166	if (args->verbose)
	167	fprintf(stderr, "%.*s\n", (int)len, args->base);
	168	err = write_entry(args, args->tree->object.sha1, args->base,
	169	len, 040777, NULL, 0);
	170	if (err)
	171	return err;
	172	}
	173
	174	context.args = args;
	175	context.write_entry = write_entry;
	176
ba053ea9 NTND	177	/*
	178	* Setup index and instruct attr to read index only
	179	*/
	180	if (!args->worktree_attributes) {
	181	memset(&opts, 0, sizeof(opts));
	182	opts.index_only = 1;
	183	opts.head_idx = -1;
	184	opts.src_index = &the_index;
	185	opts.dst_index = &the_index;
	186	opts.fn = oneway_merge;
	187	init_tree_desc(&t, args->tree->buffer, args->tree->size);
	188	if (unpack_trees(1, &t, &opts))
	189	return -1;
	190	git_attr_set_direction(GIT_ATTR_INDEX, &the_index);
	191	}
	192
ebfbdb34 RS	193	err = read_tree_recursive(args->tree, "", 0, 0, args->pathspec,
ebfbdb34 RS	194	write_archive_entry, &context);
562e25ab RS	195	if (err == READ_TREE_RECURSIVE)
	196	err = 0;
	197	return err;
	198	}
6e94e683	199
c0885435 RS	200	static const struct archiver lookup_archiver(const char name)
	201	{
	202	int i;
	203
4fac1d3a RS	204	if (!name)
	205	return NULL;
	206
c0885435 RS	207	for (i = 0; i < ARRAY_SIZE(archivers); i++) {
	208	if (!strcmp(name, archivers[i].name))
	209	return &archivers[i];
	210	}
	211	return NULL;
	212	}
	213
d5f53d6d RS	214	static int reject_entry(const unsigned char sha1, const char base,
	215	int baselen, const char *filename, unsigned mode,
	216	int stage, void *context)
	217	{
	218	return -1;
	219	}
	220
	221	static int path_exists(struct tree tree, const char path)
	222	{
	223	const char *pathspec[] = { path, NULL };
	224
	225	if (read_tree_recursive(tree, "", 0, 0, pathspec, reject_entry, NULL))
	226	return 1;
	227	return 0;
	228	}
	229
c0885435 RS	230	static void parse_pathspec_arg(const char **pathspec,
	231	struct archiver_args *ar_args)
	232	{
d5f53d6d RS	233	ar_args->pathspec = pathspec = get_pathspec("", pathspec);
	234	if (pathspec) {
	235	while (*pathspec) {
	236	if (!path_exists(ar_args->tree, *pathspec))
	237	die("path not found: %s", *pathspec);
	238	pathspec++;
	239	}
	240	}
c0885435 RS	241	}
	242
	243	static void parse_treeish_arg(const char **argv,
	244	struct archiver_args ar_args, const char prefix)
	245	{
	246	const char *name = argv[0];
	247	const unsigned char *commit_sha1;
	248	time_t archive_time;
	249	struct tree *tree;
	250	const struct commit *commit;
	251	unsigned char sha1[20];
	252
	253	if (get_sha1(name, sha1))
	254	die("Not a valid object name");
	255
	256	commit = lookup_commit_reference_gently(sha1, 1);
	257	if (commit) {
	258	commit_sha1 = commit->object.sha1;
	259	archive_time = commit->date;
	260	} else {
	261	commit_sha1 = NULL;
	262	archive_time = time(NULL);
	263	}
	264
	265	tree = parse_tree_indirect(sha1);
	266	if (tree == NULL)
	267	die("not a tree object");
	268
	269	if (prefix) {
	270	unsigned char tree_sha1[20];
	271	unsigned int mode;
	272	int err;
	273
	274	err = get_tree_entry(tree->object.sha1, prefix,
	275	tree_sha1, &mode);
	276	if (err \|\| !S_ISDIR(mode))
	277	die("current working directory is untracked");
	278
	279	tree = parse_tree_indirect(tree_sha1);
	280	}
	281	ar_args->tree = tree;
	282	ar_args->commit_sha1 = commit_sha1;
	283	ar_args->commit = commit;
	284	ar_args->time = archive_time;
	285	}
	286
4fac1d3a RS	287	#define OPT__COMPR(s, v, h, p) \
	288	{ OPTION_SET_INT, (s), NULL, (v), NULL, (h), \
	289	PARSE_OPT_NOARG \| PARSE_OPT_NONEG, NULL, (p) }
	290	#define OPT__COMPR_HIDDEN(s, v, p) \
	291	{ OPTION_SET_INT, (s), NULL, (v), NULL, "", \
	292	PARSE_OPT_NOARG \| PARSE_OPT_NONEG \| PARSE_OPT_HIDDEN, NULL, (p) }
	293
c0885435 RS	294	static int parse_archive_args(int argc, const char **argv,
	295	const struct archiver *ar, struct archiver_args args)
	296	{
	297	const char *format = "tar";
4fac1d3a RS	298	const char *base = NULL;
	299	const char *remote = NULL;
	300	const char *exec = NULL;
aec0c1bb	301	const char *output = NULL;
c0885435 RS	302	int compression_level = -1;
	303	int verbose = 0;
	304	int i;
4fac1d3a	305	int list = 0;
ba053ea9	306	int worktree_attributes = 0;
4fac1d3a RS	307	struct option opts[] = {
	308	OPT_GROUP(""),
	309	OPT_STRING(0, "format", &format, "fmt", "archive format"),
	310	OPT_STRING(0, "prefix", &base, "prefix",
	311	"prepend prefix to each pathname in the archive"),
05d3951e	312	OPT_STRING('o', "output", &output, "file",
aec0c1bb	313	"write the archive to this file"),
ba053ea9 NTND	314	OPT_BOOLEAN(0, "worktree-attributes", &worktree_attributes,
ba053ea9 NTND	315	"read .gitattributes in working directory"),
4fac1d3a RS	316	OPT__VERBOSE(&verbose),
	317	OPT__COMPR('0', &compression_level, "store only", 0),
	318	OPT__COMPR('1', &compression_level, "compress faster", 1),
	319	OPT__COMPR_HIDDEN('2', &compression_level, 2),
	320	OPT__COMPR_HIDDEN('3', &compression_level, 3),
	321	OPT__COMPR_HIDDEN('4', &compression_level, 4),
	322	OPT__COMPR_HIDDEN('5', &compression_level, 5),
	323	OPT__COMPR_HIDDEN('6', &compression_level, 6),
	324	OPT__COMPR_HIDDEN('7', &compression_level, 7),
	325	OPT__COMPR_HIDDEN('8', &compression_level, 8),
	326	OPT__COMPR('9', &compression_level, "compress better", 9),
	327	OPT_GROUP(""),
	328	OPT_BOOLEAN('l', "list", &list,
	329	"list supported archive formats"),
	330	OPT_GROUP(""),
	331	OPT_STRING(0, "remote", &remote, "repo",
	332	"retrieve the archive from remote repository <repo>"),
	333	OPT_STRING(0, "exec", &exec, "cmd",
	334	"path to the remote git-upload-archive command"),
	335	OPT_END()
	336	};
	337
37782920	338	argc = parse_options(argc, argv, NULL, opts, archive_usage, 0);
4fac1d3a RS	339
	340	if (remote)
	341	die("Unexpected option --remote");
	342	if (exec)
	343	die("Option --exec can only be used together with --remote");
52e77876 RS	344	if (output)
52e77876 RS	345	die("Unexpected option --output");
4fac1d3a RS	346
	347	if (!base)
	348	base = "";
	349
	350	if (list) {
	351	for (i = 0; i < ARRAY_SIZE(archivers); i++)
	352	printf("%s\n", archivers[i].name);
	353	exit(0);
c0885435 RS	354	}
	355
	356	/* We need at least one parameter -- tree-ish */
4fac1d3a RS	357	if (argc < 1)
4fac1d3a RS	358	usage_with_options(archive_usage, opts);
c0885435 RS	359	*ar = lookup_archiver(format);
	360	if (!*ar)
	361	die("Unknown archive format '%s'", format);
	362
	363	args->compression_level = Z_DEFAULT_COMPRESSION;
	364	if (compression_level != -1) {
	365	if ((*ar)->flags & USES_ZLIB_COMPRESSION)
	366	args->compression_level = compression_level;
	367	else {
	368	die("Argument not supported for format '%s': -%d",
	369	format, compression_level);
	370	}
	371	}
	372	args->verbose = verbose;
	373	args->base = base;
	374	args->baselen = strlen(base);
ba053ea9	375	args->worktree_attributes = worktree_attributes;
c0885435	376
4fac1d3a	377	return argc;
c0885435 RS	378	}
c0885435 RS	379
6e94e683 RS	380	int write_archive(int argc, const char *argv, const char prefix,
	381	int setup_prefix)
	382	{
	383	const struct archiver *ar = NULL;
	384	struct archiver_args args;
6e94e683	385
4fac1d3a	386	argc = parse_archive_args(argc, argv, &ar, &args);
6e94e683 RS	387	if (setup_prefix && prefix == NULL)
	388	prefix = setup_git_directory();
	389
6e94e683 RS	390	parse_treeish_arg(argv, &args, prefix);
	391	parse_pathspec_arg(argv + 1, &args);
	392
ddff8563 CB	393	git_config(git_default_config, NULL);
ddff8563 CB	394
6e94e683 RS	395	return ar->write_archive(&args);
6e94e683 RS	396	}