[thirdparty/git.git] / archive-zip.c

/*
 * Copyright (c) 2006 Rene Scharfe
 */
#include "cache.h"
#include "commit.h"
#include "blob.h"
#include "tree.h"
#include "quote.h"
#include "builtin.h"
#include "archive.h"

static int verbose;
static int zip_date;
static int zip_time;
static const struct commit *commit;
static size_t base_len;

static unsigned char *zip_dir;
static unsigned int zip_dir_size;

static unsigned int zip_offset;
static unsigned int zip_dir_offset;
static unsigned int zip_dir_entries;

#define ZIP_DIRECTORY_MIN_SIZE	(1024 * 1024)

struct zip_local_header {
	unsigned char magic[4];
	unsigned char version[2];
	unsigned char flags[2];
	unsigned char compression_method[2];
	unsigned char mtime[2];
	unsigned char mdate[2];
	unsigned char crc32[4];
	unsigned char compressed_size[4];
	unsigned char size[4];
	unsigned char filename_length[2];
	unsigned char extra_length[2];
	unsigned char _end[1];
};

struct zip_dir_header {
	unsigned char magic[4];
	unsigned char creator_version[2];
	unsigned char version[2];
	unsigned char flags[2];
	unsigned char compression_method[2];
	unsigned char mtime[2];
	unsigned char mdate[2];
	unsigned char crc32[4];
	unsigned char compressed_size[4];
	unsigned char size[4];
	unsigned char filename_length[2];
	unsigned char extra_length[2];
	unsigned char comment_length[2];
	unsigned char disk[2];
	unsigned char attr1[2];
	unsigned char attr2[4];
	unsigned char offset[4];
	unsigned char _end[1];
};

struct zip_dir_trailer {
	unsigned char magic[4];
	unsigned char disk[2];
	unsigned char directory_start_disk[2];
	unsigned char entries_on_this_disk[2];
	unsigned char entries[2];
	unsigned char size[4];
	unsigned char offset[4];
	unsigned char comment_length[2];
	unsigned char _end[1];
};

/*
 * On ARM, padding is added at the end of the struct, so a simple
 * sizeof(struct ...) reports two bytes more than the payload size
 * we're interested in.
 */
#define ZIP_LOCAL_HEADER_SIZE	offsetof(struct zip_local_header, _end)
#define ZIP_DIR_HEADER_SIZE	offsetof(struct zip_dir_header, _end)
#define ZIP_DIR_TRAILER_SIZE	offsetof(struct zip_dir_trailer, _end)

static void copy_le16(unsigned char *dest, unsigned int n)
{
	dest[0] = 0xff & n;
	dest[1] = 0xff & (n >> 010);
}

static void copy_le32(unsigned char *dest, unsigned int n)
{
	dest[0] = 0xff & n;
	dest[1] = 0xff & (n >> 010);
	dest[2] = 0xff & (n >> 020);
	dest[3] = 0xff & (n >> 030);
}

static void *zlib_deflate(void *data, unsigned long size,
                          unsigned long *compressed_size)
{
	z_stream stream;
	unsigned long maxsize;
	void *buffer;
	int result;

	memset(&stream, 0, sizeof(stream));
	deflateInit(&stream, zlib_compression_level);
	maxsize = deflateBound(&stream, size);
	buffer = xmalloc(maxsize);

	stream.next_in = data;
	stream.avail_in = size;
	stream.next_out = buffer;
	stream.avail_out = maxsize;

	do {
		result = deflate(&stream, Z_FINISH);
	} while (result == Z_OK);

	if (result != Z_STREAM_END) {
		free(buffer);
		return NULL;
	}

	deflateEnd(&stream);
	*compressed_size = stream.total_out;

	return buffer;
}

static char *construct_path(const char *base, int baselen,
                            const char *filename, int isdir, int *pathlen)
{
	int filenamelen = strlen(filename);
	int len = baselen + filenamelen;
	char *path, *p;

	if (isdir)
		len++;
	p = path = xmalloc(len + 1);

	memcpy(p, base, baselen);
	p += baselen;
	memcpy(p, filename, filenamelen);
	p += filenamelen;
	if (isdir)
		*p++ = '/';
	*p = '\0';

	*pathlen = len;

	return path;
}

static int write_zip_entry(const unsigned char *sha1,
                           const char *base, int baselen,
                           const char *filename, unsigned mode, int stage)
{
	struct zip_local_header header;
	struct zip_dir_header dirent;
	unsigned long attr2;
	unsigned long compressed_size;
	unsigned long uncompressed_size;
	unsigned long crc;
	unsigned long direntsize;
	unsigned long size;
	int method;
	int result = -1;
	int pathlen;
	unsigned char *out;
	char *path;
	enum object_type type;
	void *buffer = NULL;
	void *deflated = NULL;

	crc = crc32(0, NULL, 0);

	path = construct_path(base, baselen, filename, S_ISDIR(mode), &pathlen);
	if (is_archive_path_ignored(path + base_len))
		return 0;
	if (verbose)
		fprintf(stderr, "%s\n", path);
	if (pathlen > 0xffff) {
		error("path too long (%d chars, SHA1: %s): %s", pathlen,
		      sha1_to_hex(sha1), path);
		goto out;
	}

	if (S_ISDIR(mode) || S_ISGITLINK(mode)) {
		method = 0;
		attr2 = 16;
		result = (S_ISDIR(mode) ? READ_TREE_RECURSIVE : 0);
		out = NULL;
		uncompressed_size = 0;
		compressed_size = 0;
	} else if (S_ISREG(mode) || S_ISLNK(mode)) {
		method = 0;
		attr2 = S_ISLNK(mode) ? ((mode | 0777) << 16) :
			(mode & 0111) ? ((mode) << 16) : 0;
		if (S_ISREG(mode) && zlib_compression_level != 0)
			method = 8;
		result = 0;
		buffer = sha1_file_to_archive(path + base_len, sha1, mode,
				&type, &size, commit);
		if (!buffer)
			die("cannot read %s", sha1_to_hex(sha1));
		crc = crc32(crc, buffer, size);
		out = buffer;
		uncompressed_size = size;
		compressed_size = size;
	} else {
		error("unsupported file mode: 0%o (SHA1: %s)", mode,
		      sha1_to_hex(sha1));
		goto out;
	}

	if (method == 8) {
		deflated = zlib_deflate(buffer, size, &compressed_size);
		if (deflated && compressed_size - 6 < size) {
			/* ZLIB --> raw compressed data (see RFC 1950) */
			/* CMF and FLG ... */
			out = (unsigned char *)deflated + 2;
			compressed_size -= 6;	/* ... and ADLER32 */
		} else {
			method = 0;
			compressed_size = size;
		}
	}

	/* make sure we have enough free space in the dictionary */
	direntsize = ZIP_DIR_HEADER_SIZE + pathlen;
	while (zip_dir_size < zip_dir_offset + direntsize) {
		zip_dir_size += ZIP_DIRECTORY_MIN_SIZE;
		zip_dir = xrealloc(zip_dir, zip_dir_size);
	}

	copy_le32(dirent.magic, 0x02014b50);
	copy_le16(dirent.creator_version,
		S_ISLNK(mode) || (S_ISREG(mode) && (mode & 0111)) ? 0x0317 : 0);
	copy_le16(dirent.version, 10);
	copy_le16(dirent.flags, 0);
	copy_le16(dirent.compression_method, method);
	copy_le16(dirent.mtime, zip_time);
	copy_le16(dirent.mdate, zip_date);
	copy_le32(dirent.crc32, crc);
	copy_le32(dirent.compressed_size, compressed_size);
	copy_le32(dirent.size, uncompressed_size);
	copy_le16(dirent.filename_length, pathlen);
	copy_le16(dirent.extra_length, 0);
	copy_le16(dirent.comment_length, 0);
	copy_le16(dirent.disk, 0);
	copy_le16(dirent.attr1, 0);
	copy_le32(dirent.attr2, attr2);
	copy_le32(dirent.offset, zip_offset);
	memcpy(zip_dir + zip_dir_offset, &dirent, ZIP_DIR_HEADER_SIZE);
	zip_dir_offset += ZIP_DIR_HEADER_SIZE;
	memcpy(zip_dir + zip_dir_offset, path, pathlen);
	zip_dir_offset += pathlen;
	zip_dir_entries++;

	copy_le32(header.magic, 0x04034b50);
	copy_le16(header.version, 10);
	copy_le16(header.flags, 0);
	copy_le16(header.compression_method, method);
	copy_le16(header.mtime, zip_time);
	copy_le16(header.mdate, zip_date);
	copy_le32(header.crc32, crc);
	copy_le32(header.compressed_size, compressed_size);
	copy_le32(header.size, uncompressed_size);
	copy_le16(header.filename_length, pathlen);
	copy_le16(header.extra_length, 0);
	write_or_die(1, &header, ZIP_LOCAL_HEADER_SIZE);
	zip_offset += ZIP_LOCAL_HEADER_SIZE;
	write_or_die(1, path, pathlen);
	zip_offset += pathlen;
	if (compressed_size > 0) {
		write_or_die(1, out, compressed_size);
		zip_offset += compressed_size;
	}

out:
	free(buffer);
	free(deflated);
	free(path);

	return result;
}

static void write_zip_trailer(const unsigned char *sha1)
{
	struct zip_dir_trailer trailer;

	copy_le32(trailer.magic, 0x06054b50);
	copy_le16(trailer.disk, 0);
	copy_le16(trailer.directory_start_disk, 0);
	copy_le16(trailer.entries_on_this_disk, zip_dir_entries);
	copy_le16(trailer.entries, zip_dir_entries);
	copy_le32(trailer.size, zip_dir_offset);
	copy_le32(trailer.offset, zip_offset);
	copy_le16(trailer.comment_length, sha1 ? 40 : 0);

	write_or_die(1, zip_dir, zip_dir_offset);
	write_or_die(1, &trailer, ZIP_DIR_TRAILER_SIZE);
	if (sha1)
		write_or_die(1, sha1_to_hex(sha1), 40);
}

static void dos_time(time_t *time, int *dos_date, int *dos_time)
{
	struct tm *t = localtime(time);

	*dos_date = t->tm_mday + (t->tm_mon + 1) * 32 +
	            (t->tm_year + 1900 - 1980) * 512;
	*dos_time = t->tm_sec / 2 + t->tm_min * 32 + t->tm_hour * 2048;
}

int write_zip_archive(struct archiver_args *args)
{
	int plen = strlen(args->base);

	dos_time(&args->time, &zip_date, &zip_time);

	zip_dir = xmalloc(ZIP_DIRECTORY_MIN_SIZE);
	zip_dir_size = ZIP_DIRECTORY_MIN_SIZE;
	verbose = args->verbose;
	commit = args->commit;
	base_len = args->base ? strlen(args->base) : 0;

	if (args->base && plen > 0 && args->base[plen - 1] == '/') {
		char *base = xstrdup(args->base);
		int baselen = strlen(base);

		while (baselen > 0 && base[baselen - 1] == '/')
			base[--baselen] = '\0';
		write_zip_entry(args->tree->object.sha1, "", 0, base, 040777, 0);
		free(base);
	}
	read_tree_recursive(args->tree, args->base, plen, 0,
			    args->pathspec, write_zip_entry);
	write_zip_trailer(args->commit_sha1);

	free(zip_dir);

	return 0;
}

void *parse_extra_zip_args(int argc, const char **argv)
{
	for (; argc > 0; argc--, argv++) {
		const char *arg = argv[0];

		if (arg[0] == '-' && isdigit(arg[1]) && arg[2] == '\0')
			zlib_compression_level = arg[1] - '0';
		else
			die("Unknown argument for zip format: %s", arg);
	}
	return NULL;
}
Commit	Line	Data
e4fbbfe9 RS	1	/*
	2	* Copyright (c) 2006 Rene Scharfe
	3	*/
e4fbbfe9 RS	4	#include "cache.h"
	5	#include "commit.h"
	6	#include "blob.h"
	7	#include "tree.h"
	8	#include "quote.h"
	9	#include "builtin.h"
ec06bff5	10	#include "archive.h"
e4fbbfe9	11
e0ffb248	12	static int verbose;
e4fbbfe9 RS	13	static int zip_date;
e4fbbfe9 RS	14	static int zip_time;
8460b2fc	15	static const struct commit *commit;
ac7fa277	16	static size_t base_len;
e4fbbfe9 RS	17
	18	static unsigned char *zip_dir;
	19	static unsigned int zip_dir_size;
	20
	21	static unsigned int zip_offset;
	22	static unsigned int zip_dir_offset;
	23	static unsigned int zip_dir_entries;
	24
	25	#define ZIP_DIRECTORY_MIN_SIZE (1024 * 1024)
	26
	27	struct zip_local_header {
	28	unsigned char magic[4];
	29	unsigned char version[2];
	30	unsigned char flags[2];
	31	unsigned char compression_method[2];
	32	unsigned char mtime[2];
	33	unsigned char mdate[2];
	34	unsigned char crc32[4];
	35	unsigned char compressed_size[4];
	36	unsigned char size[4];
	37	unsigned char filename_length[2];
	38	unsigned char extra_length[2];
0ea865ce	39	unsigned char _end[1];
e4fbbfe9 RS	40	};
	41
	42	struct zip_dir_header {
	43	unsigned char magic[4];
	44	unsigned char creator_version[2];
	45	unsigned char version[2];
	46	unsigned char flags[2];
	47	unsigned char compression_method[2];
	48	unsigned char mtime[2];
	49	unsigned char mdate[2];
	50	unsigned char crc32[4];
	51	unsigned char compressed_size[4];
	52	unsigned char size[4];
	53	unsigned char filename_length[2];
	54	unsigned char extra_length[2];
	55	unsigned char comment_length[2];
	56	unsigned char disk[2];
	57	unsigned char attr1[2];
	58	unsigned char attr2[4];
	59	unsigned char offset[4];
0ea865ce	60	unsigned char _end[1];
e4fbbfe9 RS	61	};
	62
	63	struct zip_dir_trailer {
	64	unsigned char magic[4];
	65	unsigned char disk[2];
	66	unsigned char directory_start_disk[2];
	67	unsigned char entries_on_this_disk[2];
	68	unsigned char entries[2];
	69	unsigned char size[4];
	70	unsigned char offset[4];
	71	unsigned char comment_length[2];
0ea865ce	72	unsigned char _end[1];
e4fbbfe9 RS	73	};
e4fbbfe9 RS	74
0ea865ce RS	75	/*
	76	* On ARM, padding is added at the end of the struct, so a simple
	77	* sizeof(struct ...) reports two bytes more than the payload size
	78	* we're interested in.
	79	*/
	80	#define ZIP_LOCAL_HEADER_SIZE offsetof(struct zip_local_header, _end)
	81	#define ZIP_DIR_HEADER_SIZE offsetof(struct zip_dir_header, _end)
	82	#define ZIP_DIR_TRAILER_SIZE offsetof(struct zip_dir_trailer, _end)
	83
e4fbbfe9 RS	84	static void copy_le16(unsigned char *dest, unsigned int n)
	85	{
	86	dest[0] = 0xff & n;
	87	dest[1] = 0xff & (n >> 010);
	88	}
	89
	90	static void copy_le32(unsigned char *dest, unsigned int n)
	91	{
	92	dest[0] = 0xff & n;
	93	dest[1] = 0xff & (n >> 010);
	94	dest[2] = 0xff & (n >> 020);
	95	dest[3] = 0xff & (n >> 030);
	96	}
	97
	98	static void zlib_deflate(void data, unsigned long size,
	99	unsigned long *compressed_size)
	100	{
	101	z_stream stream;
	102	unsigned long maxsize;
	103	void *buffer;
	104	int result;
	105
	106	memset(&stream, 0, sizeof(stream));
	107	deflateInit(&stream, zlib_compression_level);
	108	maxsize = deflateBound(&stream, size);
	109	buffer = xmalloc(maxsize);
	110
	111	stream.next_in = data;
	112	stream.avail_in = size;
	113	stream.next_out = buffer;
	114	stream.avail_out = maxsize;
	115
	116	do {
	117	result = deflate(&stream, Z_FINISH);
	118	} while (result == Z_OK);
	119
	120	if (result != Z_STREAM_END) {
	121	free(buffer);
	122	return NULL;
	123	}
	124
	125	deflateEnd(&stream);
	126	*compressed_size = stream.total_out;
	127
	128	return buffer;
	129	}
	130
	131	static char construct_path(const char base, int baselen,
	132	const char filename, int isdir, int pathlen)
	133	{
	134	int filenamelen = strlen(filename);
	135	int len = baselen + filenamelen;
	136	char path, p;
	137
	138	if (isdir)
	139	len++;
	140	p = path = xmalloc(len + 1);
	141
	142	memcpy(p, base, baselen);
	143	p += baselen;
	144	memcpy(p, filename, filenamelen);
	145	p += filenamelen;
	146	if (isdir)
	147	*p++ = '/';
148	*p = '\0';
149
150	*pathlen = len;
151
152	return path;
153	}
154
155	static int write_zip_entry(const unsigned char *sha1,
156	const char *base, int baselen,
157	const char *filename, unsigned mode, int stage)
158	{
159	struct zip_local_header header;
160	struct zip_dir_header dirent;
62cdce17	161	unsigned long attr2;
e4fbbfe9 RS	162	unsigned long compressed_size;
	163	unsigned long uncompressed_size;
	164	unsigned long crc;
	165	unsigned long direntsize;
	166	unsigned long size;
	167	int method;
	168	int result = -1;
	169	int pathlen;
	170	unsigned char *out;
	171	char *path;
21666f1a	172	enum object_type type;
e4fbbfe9 RS	173	void *buffer = NULL;
	174	void *deflated = NULL;
	175
38f4d138	176	crc = crc32(0, NULL, 0);
e4fbbfe9 RS	177
e4fbbfe9 RS	178	path = construct_path(base, baselen, filename, S_ISDIR(mode), &pathlen);
008d896d RS	179	if (is_archive_path_ignored(path + base_len))
008d896d RS	180	return 0;
e0ffb248 JH	181	if (verbose)
e0ffb248 JH	182	fprintf(stderr, "%s\n", path);
e4fbbfe9 RS	183	if (pathlen > 0xffff) {
	184	error("path too long (%d chars, SHA1: %s): %s", pathlen,
	185	sha1_to_hex(sha1), path);
	186	goto out;
	187	}
	188
302b9282	189	if (S_ISDIR(mode) \|\| S_ISGITLINK(mode)) {
e4fbbfe9	190	method = 0;
62cdce17	191	attr2 = 16;
02851e0b	192	result = (S_ISDIR(mode) ? READ_TREE_RECURSIVE : 0);
e4fbbfe9 RS	193	out = NULL;
	194	uncompressed_size = 0;
	195	compressed_size = 0;
62cdce17 RS	196	} else if (S_ISREG(mode) \|\| S_ISLNK(mode)) {
62cdce17 RS	197	method = 0;
76bf8d0e DP	198	attr2 = S_ISLNK(mode) ? ((mode \| 0777) << 16) :
76bf8d0e DP	199	(mode & 0111) ? ((mode) << 16) : 0;
62cdce17 RS	200	if (S_ISREG(mode) && zlib_compression_level != 0)
62cdce17 RS	201	method = 8;
e4fbbfe9	202	result = 0;
ac7fa277 RS	203	buffer = sha1_file_to_archive(path + base_len, sha1, mode,
ac7fa277 RS	204	&type, &size, commit);
e4fbbfe9 RS	205	if (!buffer)
	206	die("cannot read %s", sha1_to_hex(sha1));
	207	crc = crc32(crc, buffer, size);
	208	out = buffer;
	209	uncompressed_size = size;
	210	compressed_size = size;
	211	} else {
	212	error("unsupported file mode: 0%o (SHA1: %s)", mode,
	213	sha1_to_hex(sha1));
	214	goto out;
	215	}
	216
	217	if (method == 8) {
	218	deflated = zlib_deflate(buffer, size, &compressed_size);
	219	if (deflated && compressed_size - 6 < size) {
	220	/* ZLIB --> raw compressed data (see RFC 1950) */
	221	/* CMF and FLG ... */
	222	out = (unsigned char *)deflated + 2;
	223	compressed_size -= 6; /* ... and ADLER32 */
	224	} else {
	225	method = 0;
	226	compressed_size = size;
	227	}
	228	}
	229
	230	/* make sure we have enough free space in the dictionary */
0ea865ce	231	direntsize = ZIP_DIR_HEADER_SIZE + pathlen;
e4fbbfe9 RS	232	while (zip_dir_size < zip_dir_offset + direntsize) {
	233	zip_dir_size += ZIP_DIRECTORY_MIN_SIZE;
	234	zip_dir = xrealloc(zip_dir, zip_dir_size);
	235	}
	236
	237	copy_le32(dirent.magic, 0x02014b50);
76bf8d0e DP	238	copy_le16(dirent.creator_version,
76bf8d0e DP	239	S_ISLNK(mode) \|\| (S_ISREG(mode) && (mode & 0111)) ? 0x0317 : 0);
cf72fb07	240	copy_le16(dirent.version, 10);
e4fbbfe9 RS	241	copy_le16(dirent.flags, 0);
	242	copy_le16(dirent.compression_method, method);
	243	copy_le16(dirent.mtime, zip_time);
	244	copy_le16(dirent.mdate, zip_date);
	245	copy_le32(dirent.crc32, crc);
	246	copy_le32(dirent.compressed_size, compressed_size);
	247	copy_le32(dirent.size, uncompressed_size);
	248	copy_le16(dirent.filename_length, pathlen);
	249	copy_le16(dirent.extra_length, 0);
	250	copy_le16(dirent.comment_length, 0);
	251	copy_le16(dirent.disk, 0);
	252	copy_le16(dirent.attr1, 0);
62cdce17	253	copy_le32(dirent.attr2, attr2);
e4fbbfe9	254	copy_le32(dirent.offset, zip_offset);
0ea865ce RS	255	memcpy(zip_dir + zip_dir_offset, &dirent, ZIP_DIR_HEADER_SIZE);
0ea865ce RS	256	zip_dir_offset += ZIP_DIR_HEADER_SIZE;
e4fbbfe9 RS	257	memcpy(zip_dir + zip_dir_offset, path, pathlen);
	258	zip_dir_offset += pathlen;
	259	zip_dir_entries++;
	260
	261	copy_le32(header.magic, 0x04034b50);
cf72fb07	262	copy_le16(header.version, 10);
e4fbbfe9 RS	263	copy_le16(header.flags, 0);
	264	copy_le16(header.compression_method, method);
	265	copy_le16(header.mtime, zip_time);
	266	copy_le16(header.mdate, zip_date);
	267	copy_le32(header.crc32, crc);
	268	copy_le32(header.compressed_size, compressed_size);
	269	copy_le32(header.size, uncompressed_size);
	270	copy_le16(header.filename_length, pathlen);
	271	copy_le16(header.extra_length, 0);
0ea865ce RS	272	write_or_die(1, &header, ZIP_LOCAL_HEADER_SIZE);
0ea865ce RS	273	zip_offset += ZIP_LOCAL_HEADER_SIZE;
e4fbbfe9 RS	274	write_or_die(1, path, pathlen);
	275	zip_offset += pathlen;
	276	if (compressed_size > 0) {
	277	write_or_die(1, out, compressed_size);
	278	zip_offset += compressed_size;
	279	}
	280
	281	out:
	282	free(buffer);
	283	free(deflated);
	284	free(path);
	285
	286	return result;
	287	}
	288
	289	static void write_zip_trailer(const unsigned char *sha1)
	290	{
	291	struct zip_dir_trailer trailer;
	292
	293	copy_le32(trailer.magic, 0x06054b50);
	294	copy_le16(trailer.disk, 0);
	295	copy_le16(trailer.directory_start_disk, 0);
	296	copy_le16(trailer.entries_on_this_disk, zip_dir_entries);
	297	copy_le16(trailer.entries, zip_dir_entries);
	298	copy_le32(trailer.size, zip_dir_offset);
	299	copy_le32(trailer.offset, zip_offset);
	300	copy_le16(trailer.comment_length, sha1 ? 40 : 0);
	301
	302	write_or_die(1, zip_dir, zip_dir_offset);
0ea865ce	303	write_or_die(1, &trailer, ZIP_DIR_TRAILER_SIZE);
e4fbbfe9 RS	304	if (sha1)
	305	write_or_die(1, sha1_to_hex(sha1), 40);
	306	}
	307
	308	static void dos_time(time_t time, int dos_date, int *dos_time)
	309	{
	310	struct tm *t = localtime(time);
	311
	312	dos_date = t->tm_mday + (t->tm_mon + 1) 32 +
	313	(t->tm_year + 1900 - 1980) * 512;
	314	dos_time = t->tm_sec / 2 + t->tm_min 32 + t->tm_hour * 2048;
	315	}
	316
ec06bff5 FBH	317	int write_zip_archive(struct archiver_args *args)
	318	{
	319	int plen = strlen(args->base);
	320
	321	dos_time(&args->time, &zip_date, &zip_time);
	322
	323	zip_dir = xmalloc(ZIP_DIRECTORY_MIN_SIZE);
	324	zip_dir_size = ZIP_DIRECTORY_MIN_SIZE;
e0ffb248	325	verbose = args->verbose;
8460b2fc	326	commit = args->commit;
ac7fa277	327	base_len = args->base ? strlen(args->base) : 0;
ec06bff5 FBH	328
ec06bff5 FBH	329	if (args->base && plen > 0 && args->base[plen - 1] == '/') {
326711c1	330	char *base = xstrdup(args->base);
ec06bff5 FBH	331	int baselen = strlen(base);
	332
	333	while (baselen > 0 && base[baselen - 1] == '/')
	334	base[--baselen] = '\0';
	335	write_zip_entry(args->tree->object.sha1, "", 0, base, 040777, 0);
	336	free(base);
	337	}
	338	read_tree_recursive(args->tree, args->base, plen, 0,
	339	args->pathspec, write_zip_entry);
	340	write_zip_trailer(args->commit_sha1);
	341
	342	free(zip_dir);
	343
	344	return 0;
	345	}
854c4168 RS	346
	347	void parse_extra_zip_args(int argc, const char *argv)
	348	{
	349	for (; argc > 0; argc--, argv++) {
	350	const char *arg = argv[0];
	351
	352	if (arg[0] == '-' && isdigit(arg[1]) && arg[2] == '\0')
	353	zlib_compression_level = arg[1] - '0';
	354	else
	355	die("Unknown argument for zip format: %s", arg);
	356	}
	357	return NULL;
	358	}