[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, "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;
	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;

	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_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_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");
	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_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);

	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;
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	}
3198b89f	31	if (!strcmp(var, "pack.writebitmaps")) {
d078d85b	32	write_bitmaps = git_config_bool(var, value);
3198b89f JK	33	return 0;
3198b89f JK	34	}
a1bbc6c0 SB	35	return git_default_config(var, value, cb);
	36	}
	37
	38	/*
	39	* Remove temporary $GIT_OBJECT_DIRECTORY/pack/.tmp-$$-pack-* files.
	40	*/
	41	static void remove_temporary_files(void)
	42	{
	43	struct strbuf buf = STRBUF_INIT;
	44	size_t dirlen, prefixlen;
	45	DIR *dir;
	46	struct dirent *e;
	47
	48	dir = opendir(packdir);
	49	if (!dir)
	50	return;
	51
	52	/* Point at the slash at the end of ".../objects/pack/" */
	53	dirlen = strlen(packdir) + 1;
	54	strbuf_addstr(&buf, packtmp);
	55	/* Hold the length of ".tmp-%d-pack-" */
	56	prefixlen = buf.len - dirlen;
	57
	58	while ((e = readdir(dir))) {
	59	if (strncmp(e->d_name, buf.buf + dirlen, prefixlen))
	60	continue;
	61	strbuf_setlen(&buf, dirlen);
	62	strbuf_addstr(&buf, e->d_name);
	63	unlink(buf.buf);
	64	}
	65	closedir(dir);
	66	strbuf_release(&buf);
	67	}
	68
	69	static void remove_pack_on_signal(int signo)
	70	{
	71	remove_temporary_files();
	72	sigchain_pop(signo);
	73	raise(signo);
	74	}
	75
	76	/*
	77	* Adds all packs hex strings to the fname list, which do not
	78	* have a corresponding .keep file.
	79	*/
	80	static void get_non_kept_pack_filenames(struct string_list *fname_list)
	81	{
	82	DIR *dir;
	83	struct dirent *e;
	84	char *fname;
	85	size_t len;
	86
	87	if (!(dir = opendir(packdir)))
	88	return;
	89
	90	while ((e = readdir(dir)) != NULL) {
	91	if (suffixcmp(e->d_name, ".pack"))
	92	continue;
	93
	94	len = strlen(e->d_name) - strlen(".pack");
	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	};
a1bbc6c0 SB	136	struct child_process cmd;
	137	struct string_list_item *item;
	138	struct argv_array cmd_args = ARGV_ARRAY_INIT;
	139	struct string_list names = STRING_LIST_INIT_DUP;
	140	struct string_list rollback = STRING_LIST_INIT_NODUP;
	141	struct string_list existing_packs = STRING_LIST_INIT_DUP;
	142	struct strbuf line = STRBUF_INIT;
	143	int nr_packs, ext, ret, failed;
	144	FILE *out;
	145
	146	/* variables to be filled by option parsing */
	147	int pack_everything = 0;
	148	int delete_redundant = 0;
	149	char *unpack_unreachable = NULL;
	150	int window = 0, window_memory = 0;
	151	int depth = 0;
	152	int max_pack_size = 0;
	153	int no_reuse_delta = 0, no_reuse_object = 0;
	154	int no_update_server_info = 0;
	155	int quiet = 0;
	156	int local = 0;
	157
	158	struct option builtin_repack_options[] = {
	159	OPT_BIT('a', NULL, &pack_everything,
	160	N_("pack everything in a single pack"), ALL_INTO_ONE),
	161	OPT_BIT('A', NULL, &pack_everything,
	162	N_("same as -a, and turn unreachable objects loose"),
	163	LOOSEN_UNREACHABLE \| ALL_INTO_ONE),
	164	OPT_BOOL('d', NULL, &delete_redundant,
	165	N_("remove redundant packs, and run git-prune-packed")),
	166	OPT_BOOL('f', NULL, &no_reuse_delta,
	167	N_("pass --no-reuse-delta to git-pack-objects")),
	168	OPT_BOOL('F', NULL, &no_reuse_object,
	169	N_("pass --no-reuse-object to git-pack-objects")),
	170	OPT_BOOL('n', NULL, &no_update_server_info,
	171	N_("do not run git-update-server-info")),
	172	OPT__QUIET(&quiet, N_("be quiet")),
	173	OPT_BOOL('l', "local", &local,
	174	N_("pass --local to git-pack-objects")),
d078d85b	175	OPT_BOOL('b', "write-bitmap-index", &write_bitmaps,
5cf2741c	176	N_("write bitmap index")),
a1bbc6c0 SB	177	OPT_STRING(0, "unpack-unreachable", &unpack_unreachable, N_("approxidate"),
	178	N_("with -A, do not loosen objects older than this")),
	179	OPT_INTEGER(0, "window", &window,
	180	N_("size of the window used for delta compression")),
	181	OPT_INTEGER(0, "window-memory", &window_memory,
	182	N_("same as the above, but limit memory size instead of entries count")),
	183	OPT_INTEGER(0, "depth", &depth,
	184	N_("limits the maximum delta depth")),
	185	OPT_INTEGER(0, "max-pack-size", &max_pack_size,
	186	N_("maximum size of each packfile")),
ee34a2be JK	187	OPT_BOOL(0, "pack-kept-objects", &pack_kept_objects,
ee34a2be JK	188	N_("repack objects in packs marked with .keep")),
a1bbc6c0 SB	189	OPT_END()
	190	};
	191
	192	git_config(repack_config, NULL);
	193
	194	argc = parse_options(argc, argv, prefix, builtin_repack_options,
	195	git_repack_usage, 0);
	196
ee34a2be	197	if (pack_kept_objects < 0)
2bed2d47	198	pack_kept_objects = write_bitmaps;
ee34a2be	199
a1bbc6c0 SB	200	packdir = mkpathdup("%s/pack", get_object_directory());
	201	packtmp = mkpathdup("%s/.tmp-%d-pack", packdir, (int)getpid());
	202
	203	sigchain_push_common(remove_pack_on_signal);
	204
	205	argv_array_push(&cmd_args, "pack-objects");
	206	argv_array_push(&cmd_args, "--keep-true-parents");
ee34a2be JK	207	if (!pack_kept_objects)
ee34a2be JK	208	argv_array_push(&cmd_args, "--honor-pack-keep");
a1bbc6c0 SB	209	argv_array_push(&cmd_args, "--non-empty");
	210	argv_array_push(&cmd_args, "--all");
	211	argv_array_push(&cmd_args, "--reflog");
	212	if (window)
	213	argv_array_pushf(&cmd_args, "--window=%u", window);
	214	if (window_memory)
	215	argv_array_pushf(&cmd_args, "--window-memory=%u", window_memory);
	216	if (depth)
	217	argv_array_pushf(&cmd_args, "--depth=%u", depth);
	218	if (max_pack_size)
	219	argv_array_pushf(&cmd_args, "--max_pack_size=%u", max_pack_size);
	220	if (no_reuse_delta)
	221	argv_array_pushf(&cmd_args, "--no-reuse-delta");
	222	if (no_reuse_object)
	223	argv_array_pushf(&cmd_args, "--no-reuse-object");
2bed2d47 JK	224	if (write_bitmaps)
2bed2d47 JK	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)
	232	argv_array_pushf(&cmd_args,
	233	"--unpack-unreachable=%s",
	234	unpack_unreachable);
	235	else if (pack_everything & LOOSEN_UNREACHABLE)
	236	argv_array_push(&cmd_args,
	237	"--unpack-unreachable");
	238	}
	239	} else {
	240	argv_array_push(&cmd_args, "--unpacked");
	241	argv_array_push(&cmd_args, "--incremental");
	242	}
	243
	244	if (local)
	245	argv_array_push(&cmd_args, "--local");
	246	if (quiet)
	247	argv_array_push(&cmd_args, "--quiet");
	248	if (delta_base_offset)
	249	argv_array_push(&cmd_args, "--delta-base-offset");
	250
	251	argv_array_push(&cmd_args, packtmp);
	252
	253	memset(&cmd, 0, sizeof(cmd));
	254	cmd.argv = cmd_args.argv;
	255	cmd.git_cmd = 1;
	256	cmd.out = -1;
	257	cmd.no_stdin = 1;
	258
	259	ret = start_command(&cmd);
	260	if (ret)
ffc9329f	261	return ret;
a1bbc6c0 SB	262
	263	nr_packs = 0;
	264	out = xfdopen(cmd.out, "r");
	265	while (strbuf_getline(&line, out, '\n') != EOF) {
	266	if (line.len != 40)
	267	die("repack: Expecting 40 character sha1 lines only from pack-objects.");
	268	string_list_append(&names, line.buf);
	269	nr_packs++;
	270	}
	271	fclose(out);
	272	ret = finish_command(&cmd);
	273	if (ret)
ffc9329f	274	return ret;
a1bbc6c0 SB	275	argv_array_clear(&cmd_args);
	276
	277	if (!nr_packs && !quiet)
	278	printf("Nothing new to pack.\n");
	279
	280	/*
	281	* Ok we have prepared all new packfiles.
	282	* First see if there are packs of the same name and if so
	283	* if we can move them out of the way (this can happen if we
	284	* repacked immediately after packing fully.
	285	*/
	286	failed = 0;
	287	for_each_string_list_item(item, &names) {
b328c216	288	for (ext = 0; ext < ARRAY_SIZE(exts); ext++) {
a1bbc6c0 SB	289	char fname, fname_old;
a1bbc6c0 SB	290	fname = mkpathdup("%s/%s%s", packdir,
42a02d85	291	item->string, exts[ext].name);
a1bbc6c0 SB	292	if (!file_exists(fname)) {
	293	free(fname);
	294	continue;
	295	}
	296
	297	fname_old = mkpath("%s/old-%s%s", packdir,
42a02d85	298	item->string, exts[ext].name);
a1bbc6c0 SB	299	if (file_exists(fname_old))
	300	if (unlink(fname_old))
	301	failed = 1;
	302
	303	if (!failed && rename(fname, fname_old)) {
	304	free(fname);
	305	failed = 1;
	306	break;
	307	} else {
	308	string_list_append(&rollback, fname);
	309	}
	310	}
	311	if (failed)
	312	break;
	313	}
	314	if (failed) {
	315	struct string_list rollback_failure = STRING_LIST_INIT_DUP;
	316	for_each_string_list_item(item, &rollback) {
	317	char fname, fname_old;
	318	fname = mkpathdup("%s/%s", packdir, item->string);
	319	fname_old = mkpath("%s/old-%s", packdir, item->string);
	320	if (rename(fname_old, fname))
	321	string_list_append(&rollback_failure, fname);
	322	free(fname);
	323	}
	324
	325	if (rollback_failure.nr) {
	326	int i;
	327	fprintf(stderr,
	328	"WARNING: Some packs in use have been renamed by\n"
	329	"WARNING: prefixing old- to their name, in order to\n"
	330	"WARNING: replace them with the new version of the\n"
	331	"WARNING: file. But the operation failed, and the\n"
	332	"WARNING: attempt to rename them back to their\n"
	333	"WARNING: original names also failed.\n"
	334	"WARNING: Please rename them in %s manually:\n", packdir);
	335	for (i = 0; i < rollback_failure.nr; i++)
	336	fprintf(stderr, "WARNING: old-%s -> %s\n",
	337	rollback_failure.items[i].string,
	338	rollback_failure.items[i].string);
	339	}
	340	exit(1);
	341	}
	342
	343	/* Now the ones with the same name are out of the way... */
	344	for_each_string_list_item(item, &names) {
b328c216	345	for (ext = 0; ext < ARRAY_SIZE(exts); ext++) {
a1bbc6c0 SB	346	char fname, fname_old;
a1bbc6c0 SB	347	struct stat statbuffer;
b77fcd1e	348	int exists = 0;
a1bbc6c0	349	fname = mkpathdup("%s/pack-%s%s",
42a02d85	350	packdir, item->string, exts[ext].name);
a1bbc6c0	351	fname_old = mkpathdup("%s-%s%s",
42a02d85	352	packtmp, item->string, exts[ext].name);
a1bbc6c0 SB	353	if (!stat(fname_old, &statbuffer)) {
	354	statbuffer.st_mode &= ~(S_IWUSR \| S_IWGRP \| S_IWOTH);
	355	chmod(fname_old, statbuffer.st_mode);
b77fcd1e JK	356	exists = 1;
	357	}
	358	if (exists \|\| !exts[ext].optional) {
	359	if (rename(fname_old, fname))
	360	die_errno(_("renaming '%s' failed"), fname_old);
a1bbc6c0	361	}
a1bbc6c0 SB	362	free(fname);
	363	free(fname_old);
	364	}
	365	}
	366
	367	/* Remove the "old-" files */
	368	for_each_string_list_item(item, &names) {
b328c216	369	for (ext = 0; ext < ARRAY_SIZE(exts); ext++) {
a1bbc6c0 SB	370	char *fname;
	371	fname = mkpath("%s/old-pack-%s%s",
	372	packdir,
	373	item->string,
42a02d85	374	exts[ext].name);
0b63c6a5 SB	375	if (remove_path(fname))
0b63c6a5 SB	376	warning(_("removing '%s' failed"), fname);
a1bbc6c0 SB	377	}
	378	}
	379
	380	/* End of pack replacement. */
	381
	382	if (delete_redundant) {
	383	sort_string_list(&names);
	384	for_each_string_list_item(item, &existing_packs) {
	385	char *sha1;
	386	size_t len = strlen(item->string);
	387	if (len < 40)
	388	continue;
	389	sha1 = item->string + len - 40;
	390	if (!string_list_has_string(&names, sha1))
	391	remove_redundant_pack(packdir, item->string);
	392	}
	393	argv_array_push(&cmd_args, "prune-packed");
	394	if (quiet)
	395	argv_array_push(&cmd_args, "--quiet");
	396
	397	memset(&cmd, 0, sizeof(cmd));
	398	cmd.argv = cmd_args.argv;
	399	cmd.git_cmd = 1;
	400	run_command(&cmd);
	401	argv_array_clear(&cmd_args);
	402	}
	403
	404	if (!no_update_server_info) {
	405	argv_array_push(&cmd_args, "update-server-info");
	406	memset(&cmd, 0, sizeof(cmd));
	407	cmd.argv = cmd_args.argv;
	408	cmd.git_cmd = 1;
	409	run_command(&cmd);
	410	argv_array_clear(&cmd_args);
	411	}
	412	remove_temporary_files();
	413	string_list_clear(&names, 0);
	414	string_list_clear(&rollback, 0);
	415	string_list_clear(&existing_packs, 0);
	416	strbuf_release(&line);
	417
	418	return 0;
	419	}