[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 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;
	}
	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;
	size_t len;

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

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

		len = strlen(e->d_name) - strlen(".pack");
		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;
	struct string_list_item *item;
	struct argv_array cmd_args = ARGV_ARRAY_INIT;
	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 nr_packs, ext, ret, failed;
	FILE *out;

	/* variables to be filled by option parsing */
	int pack_everything = 0;
	int delete_redundant = 0;
	char *unpack_unreachable = NULL;
	int window = 0, window_memory = 0;
	int depth = 0;
	int max_pack_size = 0;
	int no_reuse_delta = 0, no_reuse_object = 0;
	int no_update_server_info = 0;
	int quiet = 0;
	int local = 0;
	int write_bitmap = -1;

	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_bitmap,
				N_("write bitmap index")),
		OPT_STRING(0, "unpack-unreachable", &unpack_unreachable, N_("approxidate"),
				N_("with -A, do not loosen objects older than this")),
		OPT_INTEGER(0, "window", &window,
				N_("size of the window used for delta compression")),
		OPT_INTEGER(0, "window-memory", &window_memory,
				N_("same as the above, but limit memory size instead of entries count")),
		OPT_INTEGER(0, "depth", &depth,
				N_("limits the maximum delta depth")),
		OPT_INTEGER(0, "max-pack-size", &max_pack_size,
				N_("maximum size of each packfile")),
		OPT_END()
	};

	git_config(repack_config, NULL);

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

	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");
	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");
	if (window)
		argv_array_pushf(&cmd_args, "--window=%u", window);
	if (window_memory)
		argv_array_pushf(&cmd_args, "--window-memory=%u", window_memory);
	if (depth)
		argv_array_pushf(&cmd_args, "--depth=%u", depth);
	if (max_pack_size)
		argv_array_pushf(&cmd_args, "--max_pack_size=%u", 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_bitmap >= 0)
		argv_array_pushf(&cmd_args, "--%swrite-bitmap-index",
				 write_bitmap ? "" : "no-");

	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);

	memset(&cmd, 0, sizeof(cmd));
	cmd.argv = cmd_args.argv;
	cmd.git_cmd = 1;
	cmd.out = -1;
	cmd.no_stdin = 1;

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

	nr_packs = 0;
	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);
		nr_packs++;
	}
	fclose(out);
	ret = finish_command(&cmd);
	if (ret)
		return ret;
	argv_array_clear(&cmd_args);

	if (!nr_packs && !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/%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-pack-%s%s",
					packdir,
					item->string,
					exts[ext].name);
			if (remove_path(fname))
				warning(_("removing '%s' failed"), fname);
		}
	}

	/* End of pack replacement. */

	if (delete_redundant) {
		sort_string_list(&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);
		}
		argv_array_push(&cmd_args, "prune-packed");
		if (quiet)
			argv_array_push(&cmd_args, "--quiet");

		memset(&cmd, 0, sizeof(cmd));
		cmd.argv = cmd_args.argv;
		cmd.git_cmd = 1;
		run_command(&cmd);
		argv_array_clear(&cmd_args);
	}

	if (!no_update_server_info) {
		argv_array_push(&cmd_args, "update-server-info");
		memset(&cmd, 0, sizeof(cmd));
		cmd.argv = cmd_args.argv;
		cmd.git_cmd = 1;
		run_command(&cmd);
		argv_array_clear(&cmd_args);
	}
	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;
	12	static char packdir, packtmp;
	13
	14	static const char *const git_repack_usage[] = {
	15	N_("git repack [options]"),
	16	NULL
	17	};
	18
	19	static int repack_config(const char var, const char value, void *cb)
	20	{
	21	if (!strcmp(var, "repack.usedeltabaseoffset")) {
	22	delta_base_offset = git_config_bool(var, value);
	23	return 0;
	24	}
	25	return git_default_config(var, value, cb);
	26	}
	27
	28	/*
	29	* Remove temporary $GIT_OBJECT_DIRECTORY/pack/.tmp-$$-pack-* files.
	30	*/
	31	static void remove_temporary_files(void)
	32	{
	33	struct strbuf buf = STRBUF_INIT;
	34	size_t dirlen, prefixlen;
	35	DIR *dir;
	36	struct dirent *e;
	37
	38	dir = opendir(packdir);
	39	if (!dir)
	40	return;
	41
	42	/* Point at the slash at the end of ".../objects/pack/" */
	43	dirlen = strlen(packdir) + 1;
	44	strbuf_addstr(&buf, packtmp);
	45	/* Hold the length of ".tmp-%d-pack-" */
	46	prefixlen = buf.len - dirlen;
	47
	48	while ((e = readdir(dir))) {
	49	if (strncmp(e->d_name, buf.buf + dirlen, prefixlen))
	50	continue;
	51	strbuf_setlen(&buf, dirlen);
	52	strbuf_addstr(&buf, e->d_name);
	53	unlink(buf.buf);
	54	}
	55	closedir(dir);
	56	strbuf_release(&buf);
	57	}
	58
	59	static void remove_pack_on_signal(int signo)
	60	{
	61	remove_temporary_files();
	62	sigchain_pop(signo);
	63	raise(signo);
	64	}
65
66	/*
67	* Adds all packs hex strings to the fname list, which do not
68	* have a corresponding .keep file.
69	*/
70	static void get_non_kept_pack_filenames(struct string_list *fname_list)
71	{
72	DIR *dir;
73	struct dirent *e;
74	char *fname;
75	size_t len;
76
77	if (!(dir = opendir(packdir)))
78	return;
79
80	while ((e = readdir(dir)) != NULL) {
81	if (suffixcmp(e->d_name, ".pack"))
82	continue;
83
84	len = strlen(e->d_name) - strlen(".pack");
85	fname = xmemdupz(e->d_name, len);
86
87	if (!file_exists(mkpath("%s/%s.keep", packdir, fname)))
88	string_list_append_nodup(fname_list, fname);
89	else
90	free(fname);
91	}
92	closedir(dir);
93	}
94
95	static void remove_redundant_pack(const char dir_name, const char base_name)
96	{
5cf2741c	97	const char *exts[] = {".pack", ".idx", ".keep", ".bitmap"};
a1bbc6c0 SB	98	int i;
	99	struct strbuf buf = STRBUF_INIT;
	100	size_t plen;
	101
	102	strbuf_addf(&buf, "%s/%s", dir_name, base_name);
	103	plen = buf.len;
	104
	105	for (i = 0; i < ARRAY_SIZE(exts); i++) {
	106	strbuf_setlen(&buf, plen);
	107	strbuf_addstr(&buf, exts[i]);
	108	unlink(buf.buf);
	109	}
	110	strbuf_release(&buf);
	111	}
	112
	113	#define ALL_INTO_ONE 1
	114	#define LOOSEN_UNREACHABLE 2
	115
	116	int cmd_repack(int argc, const char *argv, const char prefix)
	117	{
42a02d85 JK	118	struct {
42a02d85 JK	119	const char *name;
b77fcd1e	120	unsigned optional:1;
42a02d85 JK	121	} exts[] = {
	122	{".pack"},
	123	{".idx"},
5cf2741c	124	{".bitmap", 1},
42a02d85	125	};
a1bbc6c0 SB	126	struct child_process cmd;
	127	struct string_list_item *item;
	128	struct argv_array cmd_args = ARGV_ARRAY_INIT;
	129	struct string_list names = STRING_LIST_INIT_DUP;
	130	struct string_list rollback = STRING_LIST_INIT_NODUP;
	131	struct string_list existing_packs = STRING_LIST_INIT_DUP;
	132	struct strbuf line = STRBUF_INIT;
	133	int nr_packs, ext, ret, failed;
	134	FILE *out;
	135
	136	/* variables to be filled by option parsing */
	137	int pack_everything = 0;
	138	int delete_redundant = 0;
	139	char *unpack_unreachable = NULL;
	140	int window = 0, window_memory = 0;
	141	int depth = 0;
	142	int max_pack_size = 0;
	143	int no_reuse_delta = 0, no_reuse_object = 0;
	144	int no_update_server_info = 0;
	145	int quiet = 0;
	146	int local = 0;
5cf2741c	147	int write_bitmap = -1;
a1bbc6c0 SB	148
	149	struct option builtin_repack_options[] = {
	150	OPT_BIT('a', NULL, &pack_everything,
	151	N_("pack everything in a single pack"), ALL_INTO_ONE),
	152	OPT_BIT('A', NULL, &pack_everything,
	153	N_("same as -a, and turn unreachable objects loose"),
	154	LOOSEN_UNREACHABLE \| ALL_INTO_ONE),
	155	OPT_BOOL('d', NULL, &delete_redundant,
	156	N_("remove redundant packs, and run git-prune-packed")),
	157	OPT_BOOL('f', NULL, &no_reuse_delta,
	158	N_("pass --no-reuse-delta to git-pack-objects")),
	159	OPT_BOOL('F', NULL, &no_reuse_object,
	160	N_("pass --no-reuse-object to git-pack-objects")),
	161	OPT_BOOL('n', NULL, &no_update_server_info,
	162	N_("do not run git-update-server-info")),
	163	OPT__QUIET(&quiet, N_("be quiet")),
	164	OPT_BOOL('l', "local", &local,
	165	N_("pass --local to git-pack-objects")),
5cf2741c VM	166	OPT_BOOL('b', "write-bitmap-index", &write_bitmap,
5cf2741c VM	167	N_("write bitmap index")),
a1bbc6c0 SB	168	OPT_STRING(0, "unpack-unreachable", &unpack_unreachable, N_("approxidate"),
	169	N_("with -A, do not loosen objects older than this")),
	170	OPT_INTEGER(0, "window", &window,
	171	N_("size of the window used for delta compression")),
	172	OPT_INTEGER(0, "window-memory", &window_memory,
	173	N_("same as the above, but limit memory size instead of entries count")),
	174	OPT_INTEGER(0, "depth", &depth,
	175	N_("limits the maximum delta depth")),
	176	OPT_INTEGER(0, "max-pack-size", &max_pack_size,
	177	N_("maximum size of each packfile")),
	178	OPT_END()
	179	};
	180
	181	git_config(repack_config, NULL);
	182
	183	argc = parse_options(argc, argv, prefix, builtin_repack_options,
	184	git_repack_usage, 0);
	185
	186	packdir = mkpathdup("%s/pack", get_object_directory());
	187	packtmp = mkpathdup("%s/.tmp-%d-pack", packdir, (int)getpid());
	188
	189	sigchain_push_common(remove_pack_on_signal);
	190
	191	argv_array_push(&cmd_args, "pack-objects");
	192	argv_array_push(&cmd_args, "--keep-true-parents");
	193	argv_array_push(&cmd_args, "--honor-pack-keep");
	194	argv_array_push(&cmd_args, "--non-empty");
	195	argv_array_push(&cmd_args, "--all");
	196	argv_array_push(&cmd_args, "--reflog");
	197	if (window)
	198	argv_array_pushf(&cmd_args, "--window=%u", window);
	199	if (window_memory)
	200	argv_array_pushf(&cmd_args, "--window-memory=%u", window_memory);
	201	if (depth)
	202	argv_array_pushf(&cmd_args, "--depth=%u", depth);
	203	if (max_pack_size)
	204	argv_array_pushf(&cmd_args, "--max_pack_size=%u", max_pack_size);
	205	if (no_reuse_delta)
	206	argv_array_pushf(&cmd_args, "--no-reuse-delta");
	207	if (no_reuse_object)
	208	argv_array_pushf(&cmd_args, "--no-reuse-object");
5cf2741c VM	209	if (write_bitmap >= 0)
	210	argv_array_pushf(&cmd_args, "--%swrite-bitmap-index",
	211	write_bitmap ? "" : "no-");
a1bbc6c0 SB	212
	213	if (pack_everything & ALL_INTO_ONE) {
	214	get_non_kept_pack_filenames(&existing_packs);
	215
	216	if (existing_packs.nr && delete_redundant) {
	217	if (unpack_unreachable)
	218	argv_array_pushf(&cmd_args,
	219	"--unpack-unreachable=%s",
	220	unpack_unreachable);
	221	else if (pack_everything & LOOSEN_UNREACHABLE)
	222	argv_array_push(&cmd_args,
	223	"--unpack-unreachable");
	224	}
	225	} else {
	226	argv_array_push(&cmd_args, "--unpacked");
	227	argv_array_push(&cmd_args, "--incremental");
	228	}
	229
	230	if (local)
	231	argv_array_push(&cmd_args, "--local");
	232	if (quiet)
	233	argv_array_push(&cmd_args, "--quiet");
	234	if (delta_base_offset)
	235	argv_array_push(&cmd_args, "--delta-base-offset");
	236
	237	argv_array_push(&cmd_args, packtmp);
	238
	239	memset(&cmd, 0, sizeof(cmd));
	240	cmd.argv = cmd_args.argv;
	241	cmd.git_cmd = 1;
	242	cmd.out = -1;
	243	cmd.no_stdin = 1;
	244
	245	ret = start_command(&cmd);
	246	if (ret)
ffc9329f	247	return ret;
a1bbc6c0 SB	248
	249	nr_packs = 0;
	250	out = xfdopen(cmd.out, "r");
	251	while (strbuf_getline(&line, out, '\n') != EOF) {
	252	if (line.len != 40)
	253	die("repack: Expecting 40 character sha1 lines only from pack-objects.");
	254	string_list_append(&names, line.buf);
	255	nr_packs++;
	256	}
	257	fclose(out);
	258	ret = finish_command(&cmd);
	259	if (ret)
ffc9329f	260	return ret;
a1bbc6c0 SB	261	argv_array_clear(&cmd_args);
	262
	263	if (!nr_packs && !quiet)
	264	printf("Nothing new to pack.\n");
	265
	266	/*
	267	* Ok we have prepared all new packfiles.
	268	* First see if there are packs of the same name and if so
	269	* if we can move them out of the way (this can happen if we
	270	* repacked immediately after packing fully.
	271	*/
	272	failed = 0;
	273	for_each_string_list_item(item, &names) {
b328c216	274	for (ext = 0; ext < ARRAY_SIZE(exts); ext++) {
a1bbc6c0 SB	275	char fname, fname_old;
a1bbc6c0 SB	276	fname = mkpathdup("%s/%s%s", packdir,
42a02d85	277	item->string, exts[ext].name);
a1bbc6c0 SB	278	if (!file_exists(fname)) {
	279	free(fname);
	280	continue;
	281	}
	282
	283	fname_old = mkpath("%s/old-%s%s", packdir,
42a02d85	284	item->string, exts[ext].name);
a1bbc6c0 SB	285	if (file_exists(fname_old))
	286	if (unlink(fname_old))
	287	failed = 1;
	288
	289	if (!failed && rename(fname, fname_old)) {
	290	free(fname);
	291	failed = 1;
	292	break;
	293	} else {
	294	string_list_append(&rollback, fname);
	295	}
	296	}
	297	if (failed)
	298	break;
	299	}
	300	if (failed) {
	301	struct string_list rollback_failure = STRING_LIST_INIT_DUP;
	302	for_each_string_list_item(item, &rollback) {
	303	char fname, fname_old;
	304	fname = mkpathdup("%s/%s", packdir, item->string);
	305	fname_old = mkpath("%s/old-%s", packdir, item->string);
	306	if (rename(fname_old, fname))
	307	string_list_append(&rollback_failure, fname);
	308	free(fname);
	309	}
	310
	311	if (rollback_failure.nr) {
	312	int i;
	313	fprintf(stderr,
	314	"WARNING: Some packs in use have been renamed by\n"
	315	"WARNING: prefixing old- to their name, in order to\n"
	316	"WARNING: replace them with the new version of the\n"
	317	"WARNING: file. But the operation failed, and the\n"
	318	"WARNING: attempt to rename them back to their\n"
	319	"WARNING: original names also failed.\n"
	320	"WARNING: Please rename them in %s manually:\n", packdir);
	321	for (i = 0; i < rollback_failure.nr; i++)
	322	fprintf(stderr, "WARNING: old-%s -> %s\n",
	323	rollback_failure.items[i].string,
	324	rollback_failure.items[i].string);
	325	}
	326	exit(1);
	327	}
	328
	329	/* Now the ones with the same name are out of the way... */
	330	for_each_string_list_item(item, &names) {
b328c216	331	for (ext = 0; ext < ARRAY_SIZE(exts); ext++) {
a1bbc6c0 SB	332	char fname, fname_old;
a1bbc6c0 SB	333	struct stat statbuffer;
b77fcd1e	334	int exists = 0;
a1bbc6c0	335	fname = mkpathdup("%s/pack-%s%s",
42a02d85	336	packdir, item->string, exts[ext].name);
a1bbc6c0	337	fname_old = mkpathdup("%s-%s%s",
42a02d85	338	packtmp, item->string, exts[ext].name);
a1bbc6c0 SB	339	if (!stat(fname_old, &statbuffer)) {
	340	statbuffer.st_mode &= ~(S_IWUSR \| S_IWGRP \| S_IWOTH);
	341	chmod(fname_old, statbuffer.st_mode);
b77fcd1e JK	342	exists = 1;
	343	}
	344	if (exists \|\| !exts[ext].optional) {
	345	if (rename(fname_old, fname))
	346	die_errno(_("renaming '%s' failed"), fname_old);
a1bbc6c0	347	}
a1bbc6c0 SB	348	free(fname);
	349	free(fname_old);
	350	}
	351	}
	352
	353	/* Remove the "old-" files */
	354	for_each_string_list_item(item, &names) {
b328c216	355	for (ext = 0; ext < ARRAY_SIZE(exts); ext++) {
a1bbc6c0 SB	356	char *fname;
	357	fname = mkpath("%s/old-pack-%s%s",
	358	packdir,
	359	item->string,
42a02d85	360	exts[ext].name);
0b63c6a5 SB	361	if (remove_path(fname))
0b63c6a5 SB	362	warning(_("removing '%s' failed"), fname);
a1bbc6c0 SB	363	}
	364	}
	365
	366	/* End of pack replacement. */
	367
	368	if (delete_redundant) {
	369	sort_string_list(&names);
	370	for_each_string_list_item(item, &existing_packs) {
	371	char *sha1;
	372	size_t len = strlen(item->string);
	373	if (len < 40)
	374	continue;
	375	sha1 = item->string + len - 40;
	376	if (!string_list_has_string(&names, sha1))
	377	remove_redundant_pack(packdir, item->string);
	378	}
	379	argv_array_push(&cmd_args, "prune-packed");
	380	if (quiet)
	381	argv_array_push(&cmd_args, "--quiet");
	382
	383	memset(&cmd, 0, sizeof(cmd));
	384	cmd.argv = cmd_args.argv;
	385	cmd.git_cmd = 1;
	386	run_command(&cmd);
	387	argv_array_clear(&cmd_args);
	388	}
	389
	390	if (!no_update_server_info) {
	391	argv_array_push(&cmd_args, "update-server-info");
	392	memset(&cmd, 0, sizeof(cmd));
	393	cmd.argv = cmd_args.argv;
	394	cmd.git_cmd = 1;
	395	run_command(&cmd);
	396	argv_array_clear(&cmd_args);
	397	}
	398	remove_temporary_files();
	399	string_list_clear(&names, 0);
	400	string_list_clear(&rollback, 0);
	401	string_list_clear(&existing_packs, 0);
	402	strbuf_release(&line);
	403
	404	return 0;
	405	}