[thirdparty/git.git] / builtin / repack.c

#include "builtin.h"
#include "cache.h"
#include "dir.h"
#include "parse-options.h"
#include "run-command.h"
#include "sigchain.h"
#include "strbuf.h"
#include "string-list.h"
#include "argv-array.h"

static int delta_base_offset = 1;
static int pack_kept_objects = -1;
static int write_bitmaps;
static char *packdir, *packtmp;

static const char *const git_repack_usage[] = {
	N_("git repack [options]"),
	NULL
};

static int repack_config(const char *var, const char *value, void *cb)
{
	if (!strcmp(var, "repack.usedeltabaseoffset")) {
		delta_base_offset = git_config_bool(var, value);
		return 0;
	}
	if (!strcmp(var, "repack.packkeptobjects")) {
		pack_kept_objects = git_config_bool(var, value);
		return 0;
	}
	if (!strcmp(var, "repack.writebitmaps") ||
	    !strcmp(var, "pack.writebitmaps")) {
		write_bitmaps = git_config_bool(var, value);
		return 0;
	}
	return git_default_config(var, value, cb);
}

/*
 * Remove temporary $GIT_OBJECT_DIRECTORY/pack/.tmp-$$-pack-* files.
 */
static void remove_temporary_files(void)
{
	struct strbuf buf = STRBUF_INIT;
	size_t dirlen, prefixlen;
	DIR *dir;
	struct dirent *e;

	dir = opendir(packdir);
	if (!dir)
		return;

	/* Point at the slash at the end of ".../objects/pack/" */
	dirlen = strlen(packdir) + 1;
	strbuf_addstr(&buf, packtmp);
	/* Hold the length of  ".tmp-%d-pack-" */
	prefixlen = buf.len - dirlen;

	while ((e = readdir(dir))) {
		if (strncmp(e->d_name, buf.buf + dirlen, prefixlen))
			continue;
		strbuf_setlen(&buf, dirlen);
		strbuf_addstr(&buf, e->d_name);
		unlink(buf.buf);
	}
	closedir(dir);
	strbuf_release(&buf);
}

static void remove_pack_on_signal(int signo)
{
	remove_temporary_files();
	sigchain_pop(signo);
	raise(signo);
}

/*
 * Adds all packs hex strings to the fname list, which do not
 * have a corresponding .keep file.
 */
static void get_non_kept_pack_filenames(struct string_list *fname_list)
{
	DIR *dir;
	struct dirent *e;
	char *fname;

	if (!(dir = opendir(packdir)))
		return;

	while ((e = readdir(dir)) != NULL) {
		size_t len;
		if (!strip_suffix(e->d_name, ".pack", &len))
			continue;

		fname = xmemdupz(e->d_name, len);

		if (!file_exists(mkpath("%s/%s.keep", packdir, fname)))
			string_list_append_nodup(fname_list, fname);
		else
			free(fname);
	}
	closedir(dir);
}

static void remove_redundant_pack(const char *dir_name, const char *base_name)
{
	const char *exts[] = {".pack", ".idx", ".keep", ".bitmap"};
	int i;
	struct strbuf buf = STRBUF_INIT;
	size_t plen;

	strbuf_addf(&buf, "%s/%s", dir_name, base_name);
	plen = buf.len;

	for (i = 0; i < ARRAY_SIZE(exts); i++) {
		strbuf_setlen(&buf, plen);
		strbuf_addstr(&buf, exts[i]);
		unlink(buf.buf);
	}
	strbuf_release(&buf);
}

#define ALL_INTO_ONE 1
#define LOOSEN_UNREACHABLE 2

int cmd_repack(int argc, const char **argv, const char *prefix)
{
	struct {
		const char *name;
		unsigned optional:1;
	} exts[] = {
		{".pack"},
		{".idx"},
		{".bitmap", 1},
	};
	struct child_process cmd = CHILD_PROCESS_INIT;
	struct string_list_item *item;
	struct string_list names = STRING_LIST_INIT_DUP;
	struct string_list rollback = STRING_LIST_INIT_NODUP;
	struct string_list existing_packs = STRING_LIST_INIT_DUP;
	struct strbuf line = STRBUF_INIT;
	int ext, ret, failed;
	FILE *out;

	/* variables to be filled by option parsing */
	int pack_everything = 0;
	int delete_redundant = 0;
	const char *unpack_unreachable = NULL;
	const char *window = NULL, *window_memory = NULL;
	const char *depth = NULL;
	const char *max_pack_size = NULL;
	int no_reuse_delta = 0, no_reuse_object = 0;
	int no_update_server_info = 0;
	int quiet = 0;
	int local = 0;

	struct option builtin_repack_options[] = {
		OPT_BIT('a', NULL, &pack_everything,
				N_("pack everything in a single pack"), ALL_INTO_ONE),
		OPT_BIT('A', NULL, &pack_everything,
				N_("same as -a, and turn unreachable objects loose"),
				   LOOSEN_UNREACHABLE | ALL_INTO_ONE),
		OPT_BOOL('d', NULL, &delete_redundant,
				N_("remove redundant packs, and run git-prune-packed")),
		OPT_BOOL('f', NULL, &no_reuse_delta,
				N_("pass --no-reuse-delta to git-pack-objects")),
		OPT_BOOL('F', NULL, &no_reuse_object,
				N_("pass --no-reuse-object to git-pack-objects")),
		OPT_BOOL('n', NULL, &no_update_server_info,
				N_("do not run git-update-server-info")),
		OPT__QUIET(&quiet, N_("be quiet")),
		OPT_BOOL('l', "local", &local,
				N_("pass --local to git-pack-objects")),
		OPT_BOOL('b', "write-bitmap-index", &write_bitmaps,
				N_("write bitmap index")),
		OPT_STRING(0, "unpack-unreachable", &unpack_unreachable, N_("approxidate"),
				N_("with -A, do not loosen objects older than this")),
		OPT_STRING(0, "window", &window, N_("n"),
				N_("size of the window used for delta compression")),
		OPT_STRING(0, "window-memory", &window_memory, N_("bytes"),
				N_("same as the above, but limit memory size instead of entries count")),
		OPT_STRING(0, "depth", &depth, N_("n"),
				N_("limits the maximum delta depth")),
		OPT_STRING(0, "max-pack-size", &max_pack_size, N_("bytes"),
				N_("maximum size of each packfile")),
		OPT_BOOL(0, "pack-kept-objects", &pack_kept_objects,
				N_("repack objects in packs marked with .keep")),
		OPT_END()
	};

	git_config(repack_config, NULL);

	argc = parse_options(argc, argv, prefix, builtin_repack_options,
				git_repack_usage, 0);

	if (pack_kept_objects < 0)
		pack_kept_objects = write_bitmaps;

	packdir = mkpathdup("%s/pack", get_object_directory());
	packtmp = mkpathdup("%s/.tmp-%d-pack", packdir, (int)getpid());

	sigchain_push_common(remove_pack_on_signal);

	argv_array_push(&cmd.args, "pack-objects");
	argv_array_push(&cmd.args, "--keep-true-parents");
	if (!pack_kept_objects)
		argv_array_push(&cmd.args, "--honor-pack-keep");
	argv_array_push(&cmd.args, "--non-empty");
	argv_array_push(&cmd.args, "--all");
	argv_array_push(&cmd.args, "--reflog");
	argv_array_push(&cmd.args, "--indexed-objects");
	if (window)
		argv_array_pushf(&cmd.args, "--window=%s", window);
	if (window_memory)
		argv_array_pushf(&cmd.args, "--window-memory=%s", window_memory);
	if (depth)
		argv_array_pushf(&cmd.args, "--depth=%s", depth);
	if (max_pack_size)
		argv_array_pushf(&cmd.args, "--max-pack-size=%s", max_pack_size);
	if (no_reuse_delta)
		argv_array_pushf(&cmd.args, "--no-reuse-delta");
	if (no_reuse_object)
		argv_array_pushf(&cmd.args, "--no-reuse-object");
	if (write_bitmaps)
		argv_array_push(&cmd.args, "--write-bitmap-index");

	if (pack_everything & ALL_INTO_ONE) {
		get_non_kept_pack_filenames(&existing_packs);

		if (existing_packs.nr && delete_redundant) {
			if (unpack_unreachable)
				argv_array_pushf(&cmd.args,
						"--unpack-unreachable=%s",
						unpack_unreachable);
			else if (pack_everything & LOOSEN_UNREACHABLE)
				argv_array_push(&cmd.args,
						"--unpack-unreachable");
		}
	} else {
		argv_array_push(&cmd.args, "--unpacked");
		argv_array_push(&cmd.args, "--incremental");
	}

	if (local)
		argv_array_push(&cmd.args,  "--local");
	if (quiet)
		argv_array_push(&cmd.args,  "--quiet");
	if (delta_base_offset)
		argv_array_push(&cmd.args,  "--delta-base-offset");

	argv_array_push(&cmd.args, packtmp);

	cmd.git_cmd = 1;
	cmd.out = -1;
	cmd.no_stdin = 1;

	ret = start_command(&cmd);
	if (ret)
		return ret;

	out = xfdopen(cmd.out, "r");
	while (strbuf_getline(&line, out, '\n') != EOF) {
		if (line.len != 40)
			die("repack: Expecting 40 character sha1 lines only from pack-objects.");
		string_list_append(&names, line.buf);
	}
	fclose(out);
	ret = finish_command(&cmd);
	if (ret)
		return ret;

	if (!names.nr && !quiet)
		printf("Nothing new to pack.\n");

	/*
	 * Ok we have prepared all new packfiles.
	 * First see if there are packs of the same name and if so
	 * if we can move them out of the way (this can happen if we
	 * repacked immediately after packing fully.
	 */
	failed = 0;
	for_each_string_list_item(item, &names) {
		for (ext = 0; ext < ARRAY_SIZE(exts); ext++) {
			char *fname, *fname_old;
			fname = mkpathdup("%s/pack-%s%s", packdir,
						item->string, exts[ext].name);
			if (!file_exists(fname)) {
				free(fname);
				continue;
			}

			fname_old = mkpath("%s/old-%s%s", packdir,
						item->string, exts[ext].name);
			if (file_exists(fname_old))
				if (unlink(fname_old))
					failed = 1;

			if (!failed && rename(fname, fname_old)) {
				free(fname);
				failed = 1;
				break;
			} else {
				string_list_append(&rollback, fname);
			}
		}
		if (failed)
			break;
	}
	if (failed) {
		struct string_list rollback_failure = STRING_LIST_INIT_DUP;
		for_each_string_list_item(item, &rollback) {
			char *fname, *fname_old;
			fname = mkpathdup("%s/%s", packdir, item->string);
			fname_old = mkpath("%s/old-%s", packdir, item->string);
			if (rename(fname_old, fname))
				string_list_append(&rollback_failure, fname);
			free(fname);
		}

		if (rollback_failure.nr) {
			int i;
			fprintf(stderr,
				"WARNING: Some packs in use have been renamed by\n"
				"WARNING: prefixing old- to their name, in order to\n"
				"WARNING: replace them with the new version of the\n"
				"WARNING: file.  But the operation failed, and the\n"
				"WARNING: attempt to rename them back to their\n"
				"WARNING: original names also failed.\n"
				"WARNING: Please rename them in %s manually:\n", packdir);
			for (i = 0; i < rollback_failure.nr; i++)
				fprintf(stderr, "WARNING:   old-%s -> %s\n",
					rollback_failure.items[i].string,
					rollback_failure.items[i].string);
		}
		exit(1);
	}

	/* Now the ones with the same name are out of the way... */
	for_each_string_list_item(item, &names) {
		for (ext = 0; ext < ARRAY_SIZE(exts); ext++) {
			char *fname, *fname_old;
			struct stat statbuffer;
			int exists = 0;
			fname = mkpathdup("%s/pack-%s%s",
					packdir, item->string, exts[ext].name);
			fname_old = mkpathdup("%s-%s%s",
					packtmp, item->string, exts[ext].name);
			if (!stat(fname_old, &statbuffer)) {
				statbuffer.st_mode &= ~(S_IWUSR | S_IWGRP | S_IWOTH);
				chmod(fname_old, statbuffer.st_mode);
				exists = 1;
			}
			if (exists || !exts[ext].optional) {
				if (rename(fname_old, fname))
					die_errno(_("renaming '%s' failed"), fname_old);
			}
			free(fname);
			free(fname_old);
		}
	}

	/* Remove the "old-" files */
	for_each_string_list_item(item, &names) {
		for (ext = 0; ext < ARRAY_SIZE(exts); ext++) {
			char *fname;
			fname = mkpath("%s/old-%s%s",
					packdir,
					item->string,
					exts[ext].name);
			if (remove_path(fname))
				warning(_("removing '%s' failed"), fname);
		}
	}

	/* End of pack replacement. */

	if (delete_redundant) {
		int opts = 0;
		string_list_sort(&names);
		for_each_string_list_item(item, &existing_packs) {
			char *sha1;
			size_t len = strlen(item->string);
			if (len < 40)
				continue;
			sha1 = item->string + len - 40;
			if (!string_list_has_string(&names, sha1))
				remove_redundant_pack(packdir, item->string);
		}
		if (!quiet && isatty(2))
			opts |= PRUNE_PACKED_VERBOSE;
		prune_packed_objects(opts);
	}

	if (!no_update_server_info)
		update_server_info(0);
	remove_temporary_files();
	string_list_clear(&names, 0);
	string_list_clear(&rollback, 0);
	string_list_clear(&existing_packs, 0);
	strbuf_release(&line);

	return 0;
}
Commit	Line	Data
a1bbc6c0 SB	1	#include "builtin.h"
	2	#include "cache.h"
	3	#include "dir.h"
	4	#include "parse-options.h"
	5	#include "run-command.h"
	6	#include "sigchain.h"
	7	#include "strbuf.h"
	8	#include "string-list.h"
	9	#include "argv-array.h"
	10
	11	static int delta_base_offset = 1;
ee34a2be	12	static int pack_kept_objects = -1;
2bed2d47	13	static int write_bitmaps;
a1bbc6c0 SB	14	static char packdir, packtmp;
	15
	16	static const char *const git_repack_usage[] = {
	17	N_("git repack [options]"),
	18	NULL
	19	};
	20
	21	static int repack_config(const char var, const char value, void *cb)
	22	{
	23	if (!strcmp(var, "repack.usedeltabaseoffset")) {
	24	delta_base_offset = git_config_bool(var, value);
	25	return 0;
	26	}
ee34a2be JK	27	if (!strcmp(var, "repack.packkeptobjects")) {
	28	pack_kept_objects = git_config_bool(var, value);
	29	return 0;
	30	}
71d76cb4 JK	31	if (!strcmp(var, "repack.writebitmaps") \|\|
71d76cb4 JK	32	!strcmp(var, "pack.writebitmaps")) {
d078d85b	33	write_bitmaps = git_config_bool(var, value);
3198b89f JK	34	return 0;
3198b89f JK	35	}
a1bbc6c0 SB	36	return git_default_config(var, value, cb);
	37	}
	38
	39	/*
	40	* Remove temporary $GIT_OBJECT_DIRECTORY/pack/.tmp-$$-pack-* files.
	41	*/
	42	static void remove_temporary_files(void)
	43	{
	44	struct strbuf buf = STRBUF_INIT;
	45	size_t dirlen, prefixlen;
	46	DIR *dir;
	47	struct dirent *e;
	48
	49	dir = opendir(packdir);
	50	if (!dir)
	51	return;
	52
	53	/* Point at the slash at the end of ".../objects/pack/" */
	54	dirlen = strlen(packdir) + 1;
	55	strbuf_addstr(&buf, packtmp);
	56	/* Hold the length of ".tmp-%d-pack-" */
	57	prefixlen = buf.len - dirlen;
	58
	59	while ((e = readdir(dir))) {
	60	if (strncmp(e->d_name, buf.buf + dirlen, prefixlen))
	61	continue;
	62	strbuf_setlen(&buf, dirlen);
	63	strbuf_addstr(&buf, e->d_name);
	64	unlink(buf.buf);
	65	}
	66	closedir(dir);
	67	strbuf_release(&buf);
	68	}
	69
	70	static void remove_pack_on_signal(int signo)
	71	{
	72	remove_temporary_files();
	73	sigchain_pop(signo);
	74	raise(signo);
	75	}
	76
	77	/*
	78	* Adds all packs hex strings to the fname list, which do not
	79	* have a corresponding .keep file.
	80	*/
	81	static void get_non_kept_pack_filenames(struct string_list *fname_list)
	82	{
	83	DIR *dir;
	84	struct dirent *e;
	85	char *fname;
a1bbc6c0 SB	86
	87	if (!(dir = opendir(packdir)))
	88	return;
	89
	90	while ((e = readdir(dir)) != NULL) {
26936bfd JK	91	size_t len;
26936bfd JK	92	if (!strip_suffix(e->d_name, ".pack", &len))
a1bbc6c0 SB	93	continue;
a1bbc6c0 SB	94
a1bbc6c0 SB	95	fname = xmemdupz(e->d_name, len);
	96
	97	if (!file_exists(mkpath("%s/%s.keep", packdir, fname)))
	98	string_list_append_nodup(fname_list, fname);
	99	else
	100	free(fname);
	101	}
	102	closedir(dir);
	103	}
	104
	105	static void remove_redundant_pack(const char dir_name, const char base_name)
	106	{
5cf2741c	107	const char *exts[] = {".pack", ".idx", ".keep", ".bitmap"};
a1bbc6c0 SB	108	int i;
	109	struct strbuf buf = STRBUF_INIT;
	110	size_t plen;
	111
	112	strbuf_addf(&buf, "%s/%s", dir_name, base_name);
	113	plen = buf.len;
	114
	115	for (i = 0; i < ARRAY_SIZE(exts); i++) {
	116	strbuf_setlen(&buf, plen);
	117	strbuf_addstr(&buf, exts[i]);
	118	unlink(buf.buf);
	119	}
	120	strbuf_release(&buf);
	121	}
	122
	123	#define ALL_INTO_ONE 1
	124	#define LOOSEN_UNREACHABLE 2
	125
	126	int cmd_repack(int argc, const char *argv, const char prefix)
	127	{
42a02d85 JK	128	struct {
42a02d85 JK	129	const char *name;
b77fcd1e	130	unsigned optional:1;
42a02d85 JK	131	} exts[] = {
	132	{".pack"},
	133	{".idx"},
5cf2741c	134	{".bitmap", 1},
42a02d85	135	};
d3180279	136	struct child_process cmd = CHILD_PROCESS_INIT;
a1bbc6c0	137	struct string_list_item *item;
a1bbc6c0 SB	138	struct string_list names = STRING_LIST_INIT_DUP;
	139	struct string_list rollback = STRING_LIST_INIT_NODUP;
	140	struct string_list existing_packs = STRING_LIST_INIT_DUP;
	141	struct strbuf line = STRBUF_INIT;
3e7b066e	142	int ext, ret, failed;
a1bbc6c0 SB	143	FILE *out;
	144
	145	/* variables to be filled by option parsing */
	146	int pack_everything = 0;
	147	int delete_redundant = 0;
aa8bd519	148	const char *unpack_unreachable = NULL;
b861e235 JK	149	const char window = NULL, window_memory = NULL;
	150	const char *depth = NULL;
	151	const char *max_pack_size = NULL;
a1bbc6c0 SB	152	int no_reuse_delta = 0, no_reuse_object = 0;
	153	int no_update_server_info = 0;
	154	int quiet = 0;
	155	int local = 0;
	156
	157	struct option builtin_repack_options[] = {
	158	OPT_BIT('a', NULL, &pack_everything,
	159	N_("pack everything in a single pack"), ALL_INTO_ONE),
	160	OPT_BIT('A', NULL, &pack_everything,
	161	N_("same as -a, and turn unreachable objects loose"),
	162	LOOSEN_UNREACHABLE \| ALL_INTO_ONE),
	163	OPT_BOOL('d', NULL, &delete_redundant,
	164	N_("remove redundant packs, and run git-prune-packed")),
	165	OPT_BOOL('f', NULL, &no_reuse_delta,
	166	N_("pass --no-reuse-delta to git-pack-objects")),
	167	OPT_BOOL('F', NULL, &no_reuse_object,
	168	N_("pass --no-reuse-object to git-pack-objects")),
	169	OPT_BOOL('n', NULL, &no_update_server_info,
	170	N_("do not run git-update-server-info")),
	171	OPT__QUIET(&quiet, N_("be quiet")),
	172	OPT_BOOL('l', "local", &local,
	173	N_("pass --local to git-pack-objects")),
d078d85b	174	OPT_BOOL('b', "write-bitmap-index", &write_bitmaps,
5cf2741c	175	N_("write bitmap index")),
a1bbc6c0 SB	176	OPT_STRING(0, "unpack-unreachable", &unpack_unreachable, N_("approxidate"),
a1bbc6c0 SB	177	N_("with -A, do not loosen objects older than this")),
b861e235	178	OPT_STRING(0, "window", &window, N_("n"),
a1bbc6c0	179	N_("size of the window used for delta compression")),
b861e235	180	OPT_STRING(0, "window-memory", &window_memory, N_("bytes"),
a1bbc6c0	181	N_("same as the above, but limit memory size instead of entries count")),
b861e235	182	OPT_STRING(0, "depth", &depth, N_("n"),
a1bbc6c0	183	N_("limits the maximum delta depth")),
b861e235	184	OPT_STRING(0, "max-pack-size", &max_pack_size, N_("bytes"),
a1bbc6c0	185	N_("maximum size of each packfile")),
ee34a2be JK	186	OPT_BOOL(0, "pack-kept-objects", &pack_kept_objects,
ee34a2be JK	187	N_("repack objects in packs marked with .keep")),
a1bbc6c0 SB	188	OPT_END()
	189	};
	190
	191	git_config(repack_config, NULL);
	192
	193	argc = parse_options(argc, argv, prefix, builtin_repack_options,
	194	git_repack_usage, 0);
	195
ee34a2be	196	if (pack_kept_objects < 0)
2bed2d47	197	pack_kept_objects = write_bitmaps;
ee34a2be	198
a1bbc6c0 SB	199	packdir = mkpathdup("%s/pack", get_object_directory());
	200	packtmp = mkpathdup("%s/.tmp-%d-pack", packdir, (int)getpid());
	201
	202	sigchain_push_common(remove_pack_on_signal);
	203
a2bae2dc RS	204	argv_array_push(&cmd.args, "pack-objects");
a2bae2dc RS	205	argv_array_push(&cmd.args, "--keep-true-parents");
ee34a2be	206	if (!pack_kept_objects)
a2bae2dc RS	207	argv_array_push(&cmd.args, "--honor-pack-keep");
	208	argv_array_push(&cmd.args, "--non-empty");
	209	argv_array_push(&cmd.args, "--all");
	210	argv_array_push(&cmd.args, "--reflog");
	211	argv_array_push(&cmd.args, "--indexed-objects");
a1bbc6c0	212	if (window)
a2bae2dc	213	argv_array_pushf(&cmd.args, "--window=%s", window);
a1bbc6c0	214	if (window_memory)
a2bae2dc	215	argv_array_pushf(&cmd.args, "--window-memory=%s", window_memory);
a1bbc6c0	216	if (depth)
a2bae2dc	217	argv_array_pushf(&cmd.args, "--depth=%s", depth);
a1bbc6c0	218	if (max_pack_size)
a2bae2dc	219	argv_array_pushf(&cmd.args, "--max-pack-size=%s", max_pack_size);
a1bbc6c0	220	if (no_reuse_delta)
a2bae2dc	221	argv_array_pushf(&cmd.args, "--no-reuse-delta");
a1bbc6c0	222	if (no_reuse_object)
a2bae2dc	223	argv_array_pushf(&cmd.args, "--no-reuse-object");
2bed2d47	224	if (write_bitmaps)
a2bae2dc	225	argv_array_push(&cmd.args, "--write-bitmap-index");
a1bbc6c0 SB	226
	227	if (pack_everything & ALL_INTO_ONE) {
	228	get_non_kept_pack_filenames(&existing_packs);
	229
	230	if (existing_packs.nr && delete_redundant) {
	231	if (unpack_unreachable)
a2bae2dc	232	argv_array_pushf(&cmd.args,
a1bbc6c0 SB	233	"--unpack-unreachable=%s",
	234	unpack_unreachable);
	235	else if (pack_everything & LOOSEN_UNREACHABLE)
a2bae2dc	236	argv_array_push(&cmd.args,
a1bbc6c0 SB	237	"--unpack-unreachable");
	238	}
	239	} else {
a2bae2dc RS	240	argv_array_push(&cmd.args, "--unpacked");
a2bae2dc RS	241	argv_array_push(&cmd.args, "--incremental");
a1bbc6c0 SB	242	}
	243
	244	if (local)
a2bae2dc	245	argv_array_push(&cmd.args, "--local");
a1bbc6c0	246	if (quiet)
a2bae2dc	247	argv_array_push(&cmd.args, "--quiet");
a1bbc6c0	248	if (delta_base_offset)
a2bae2dc	249	argv_array_push(&cmd.args, "--delta-base-offset");
a1bbc6c0	250
a2bae2dc	251	argv_array_push(&cmd.args, packtmp);
a1bbc6c0	252
a1bbc6c0 SB	253	cmd.git_cmd = 1;
	254	cmd.out = -1;
	255	cmd.no_stdin = 1;
	256
	257	ret = start_command(&cmd);
	258	if (ret)
ffc9329f	259	return ret;
a1bbc6c0	260
a1bbc6c0 SB	261	out = xfdopen(cmd.out, "r");
	262	while (strbuf_getline(&line, out, '\n') != EOF) {
	263	if (line.len != 40)
	264	die("repack: Expecting 40 character sha1 lines only from pack-objects.");
	265	string_list_append(&names, line.buf);
a1bbc6c0 SB	266	}
	267	fclose(out);
	268	ret = finish_command(&cmd);
	269	if (ret)
ffc9329f	270	return ret;
a1bbc6c0	271
3e7b066e	272	if (!names.nr && !quiet)
a1bbc6c0 SB	273	printf("Nothing new to pack.\n");
	274
	275	/*
	276	* Ok we have prepared all new packfiles.
	277	* First see if there are packs of the same name and if so
	278	* if we can move them out of the way (this can happen if we
	279	* repacked immediately after packing fully.
	280	*/
	281	failed = 0;
	282	for_each_string_list_item(item, &names) {
b328c216	283	for (ext = 0; ext < ARRAY_SIZE(exts); ext++) {
a1bbc6c0	284	char fname, fname_old;
9d7fbfd2	285	fname = mkpathdup("%s/pack-%s%s", packdir,
42a02d85	286	item->string, exts[ext].name);
a1bbc6c0 SB	287	if (!file_exists(fname)) {
	288	free(fname);
	289	continue;
	290	}
	291
	292	fname_old = mkpath("%s/old-%s%s", packdir,
42a02d85	293	item->string, exts[ext].name);
a1bbc6c0 SB	294	if (file_exists(fname_old))
	295	if (unlink(fname_old))
	296	failed = 1;
	297
	298	if (!failed && rename(fname, fname_old)) {
	299	free(fname);
	300	failed = 1;
	301	break;
	302	} else {
	303	string_list_append(&rollback, fname);
	304	}
	305	}
	306	if (failed)
	307	break;
	308	}
	309	if (failed) {
	310	struct string_list rollback_failure = STRING_LIST_INIT_DUP;
	311	for_each_string_list_item(item, &rollback) {
	312	char fname, fname_old;
	313	fname = mkpathdup("%s/%s", packdir, item->string);
	314	fname_old = mkpath("%s/old-%s", packdir, item->string);
	315	if (rename(fname_old, fname))
	316	string_list_append(&rollback_failure, fname);
	317	free(fname);
	318	}
	319
	320	if (rollback_failure.nr) {
	321	int i;
	322	fprintf(stderr,
	323	"WARNING: Some packs in use have been renamed by\n"
	324	"WARNING: prefixing old- to their name, in order to\n"
	325	"WARNING: replace them with the new version of the\n"
	326	"WARNING: file. But the operation failed, and the\n"
	327	"WARNING: attempt to rename them back to their\n"
	328	"WARNING: original names also failed.\n"
	329	"WARNING: Please rename them in %s manually:\n", packdir);
	330	for (i = 0; i < rollback_failure.nr; i++)
	331	fprintf(stderr, "WARNING: old-%s -> %s\n",
	332	rollback_failure.items[i].string,
	333	rollback_failure.items[i].string);
	334	}
	335	exit(1);
	336	}
	337
	338	/* Now the ones with the same name are out of the way... */
	339	for_each_string_list_item(item, &names) {
b328c216	340	for (ext = 0; ext < ARRAY_SIZE(exts); ext++) {
a1bbc6c0 SB	341	char fname, fname_old;
a1bbc6c0 SB	342	struct stat statbuffer;
b77fcd1e	343	int exists = 0;
a1bbc6c0	344	fname = mkpathdup("%s/pack-%s%s",
42a02d85	345	packdir, item->string, exts[ext].name);
a1bbc6c0	346	fname_old = mkpathdup("%s-%s%s",
42a02d85	347	packtmp, item->string, exts[ext].name);
a1bbc6c0 SB	348	if (!stat(fname_old, &statbuffer)) {
	349	statbuffer.st_mode &= ~(S_IWUSR \| S_IWGRP \| S_IWOTH);
	350	chmod(fname_old, statbuffer.st_mode);
b77fcd1e JK	351	exists = 1;
	352	}
	353	if (exists \|\| !exts[ext].optional) {
	354	if (rename(fname_old, fname))
	355	die_errno(_("renaming '%s' failed"), fname_old);
a1bbc6c0	356	}
a1bbc6c0 SB	357	free(fname);
	358	free(fname_old);
	359	}
	360	}
	361
	362	/* Remove the "old-" files */
	363	for_each_string_list_item(item, &names) {
b328c216	364	for (ext = 0; ext < ARRAY_SIZE(exts); ext++) {
a1bbc6c0	365	char *fname;
9d7fbfd2	366	fname = mkpath("%s/old-%s%s",
a1bbc6c0 SB	367	packdir,
a1bbc6c0 SB	368	item->string,
42a02d85	369	exts[ext].name);
0b63c6a5 SB	370	if (remove_path(fname))
0b63c6a5 SB	371	warning(_("removing '%s' failed"), fname);
a1bbc6c0 SB	372	}
	373	}
	374
	375	/* End of pack replacement. */
	376
	377	if (delete_redundant) {
4489a480	378	int opts = 0;
3383e199	379	string_list_sort(&names);
a1bbc6c0 SB	380	for_each_string_list_item(item, &existing_packs) {
	381	char *sha1;
	382	size_t len = strlen(item->string);
	383	if (len < 40)
	384	continue;
	385	sha1 = item->string + len - 40;
	386	if (!string_list_has_string(&names, sha1))
	387	remove_redundant_pack(packdir, item->string);
	388	}
4489a480 RS	389	if (!quiet && isatty(2))
	390	opts \|= PRUNE_PACKED_VERBOSE;
	391	prune_packed_objects(opts);
a1bbc6c0 SB	392	}
a1bbc6c0 SB	393
4489a480 RS	394	if (!no_update_server_info)
4489a480 RS	395	update_server_info(0);
a1bbc6c0 SB	396	remove_temporary_files();
	397	string_list_clear(&names, 0);
	398	string_list_clear(&rollback, 0);
	399	string_list_clear(&existing_packs, 0);
	400	strbuf_release(&line);
	401
	402	return 0;
	403	}