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

#include "builtin.h"
#include "cache.h"
#include "config.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 const char incremental_bitmap_conflict_error[] = N_(
"Incremental repacks are incompatible with bitmap indexes.  Use\n"
"--no-write-bitmap-index or disable the pack.writebitmaps configuration."
);


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;
	int keep_unreachable = 0;
	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_BOOL('k', "keep-unreachable", &keep_unreachable,
				N_("with -a, repack unreachable objects")),
		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 (delete_redundant && repository_format_precious_objects)
		die(_("cannot delete packs in a precious-objects repo"));

	if (keep_unreachable &&
	    (unpack_unreachable || (pack_everything & LOOSEN_UNREACHABLE)))
		die(_("--keep-unreachable and -A are incompatible"));

	if (pack_kept_objects < 0)
		pack_kept_objects = write_bitmaps;

	if (write_bitmaps && !(pack_everything & ALL_INTO_ONE))
		die(_(incremental_bitmap_conflict_error));

	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);
				argv_array_push(&cmd.env_array, "GIT_REF_PARANOIA=1");
			} else if (pack_everything & LOOSEN_UNREACHABLE) {
				argv_array_push(&cmd.args,
						"--unpack-unreachable");
			} else if (keep_unreachable) {
				argv_array_push(&cmd.args, "--keep-unreachable");
				argv_array_push(&cmd.args, "--pack-loose-unreachable");
			} else {
				argv_array_push(&cmd.env_array, "GIT_REF_PARANOIA=1");
			}
		}
	} 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_lf(&line, out) != 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 = mkpathdup("%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);
				free(fname_old);
				failed = 1;
				break;
			} else {
				string_list_append(&rollback, fname);
				free(fname_old);
			}
		}
		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 = mkpathdup("%s/old-%s", packdir, item->string);
			if (rename(fname_old, fname))
				string_list_append(&rollback_failure, fname);
			free(fname);
			free(fname_old);
		}

		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 = mkpathdup("%s/old-%s%s",
					  packdir,
					  item->string,
					  exts[ext].name);
			if (remove_path(fname))
				warning(_("failed to remove '%s'"), fname);
			free(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"
a1bbc6c0 SB	2	#include "cache.h"
b2141fc1	3	#include "config.h"
a1bbc6c0 SB	4	#include "dir.h"
	5	#include "parse-options.h"
	6	#include "run-command.h"
	7	#include "sigchain.h"
	8	#include "strbuf.h"
	9	#include "string-list.h"
	10	#include "argv-array.h"
	11
	12	static int delta_base_offset = 1;
ee34a2be	13	static int pack_kept_objects = -1;
2bed2d47	14	static int write_bitmaps;
a1bbc6c0 SB	15	static char packdir, packtmp;
	16
	17	static const char *const git_repack_usage[] = {
9c9b4f2f	18	N_("git repack [<options>]"),
a1bbc6c0 SB	19	NULL
	20	};
	21
1c409a70 DT	22	static const char incremental_bitmap_conflict_error[] = N_(
	23	"Incremental repacks are incompatible with bitmap indexes. Use\n"
	24	"--no-write-bitmap-index or disable the pack.writebitmaps configuration."
	25	);
	26
	27
a1bbc6c0 SB	28	static int repack_config(const char var, const char value, void *cb)
	29	{
	30	if (!strcmp(var, "repack.usedeltabaseoffset")) {
	31	delta_base_offset = git_config_bool(var, value);
	32	return 0;
	33	}
ee34a2be JK	34	if (!strcmp(var, "repack.packkeptobjects")) {
	35	pack_kept_objects = git_config_bool(var, value);
	36	return 0;
	37	}
71d76cb4 JK	38	if (!strcmp(var, "repack.writebitmaps") \|\|
71d76cb4 JK	39	!strcmp(var, "pack.writebitmaps")) {
d078d85b	40	write_bitmaps = git_config_bool(var, value);
3198b89f JK	41	return 0;
3198b89f JK	42	}
a1bbc6c0 SB	43	return git_default_config(var, value, cb);
	44	}
	45
	46	/*
	47	* Remove temporary $GIT_OBJECT_DIRECTORY/pack/.tmp-$$-pack-* files.
	48	*/
	49	static void remove_temporary_files(void)
	50	{
	51	struct strbuf buf = STRBUF_INIT;
	52	size_t dirlen, prefixlen;
	53	DIR *dir;
	54	struct dirent *e;
	55
	56	dir = opendir(packdir);
	57	if (!dir)
	58	return;
	59
	60	/* Point at the slash at the end of ".../objects/pack/" */
	61	dirlen = strlen(packdir) + 1;
	62	strbuf_addstr(&buf, packtmp);
	63	/* Hold the length of ".tmp-%d-pack-" */
	64	prefixlen = buf.len - dirlen;
	65
	66	while ((e = readdir(dir))) {
	67	if (strncmp(e->d_name, buf.buf + dirlen, prefixlen))
	68	continue;
	69	strbuf_setlen(&buf, dirlen);
	70	strbuf_addstr(&buf, e->d_name);
	71	unlink(buf.buf);
	72	}
	73	closedir(dir);
	74	strbuf_release(&buf);
	75	}
	76
	77	static void remove_pack_on_signal(int signo)
	78	{
	79	remove_temporary_files();
	80	sigchain_pop(signo);
	81	raise(signo);
	82	}
	83
	84	/*
	85	* Adds all packs hex strings to the fname list, which do not
	86	* have a corresponding .keep file.
	87	*/
	88	static void get_non_kept_pack_filenames(struct string_list *fname_list)
	89	{
	90	DIR *dir;
	91	struct dirent *e;
	92	char *fname;
a1bbc6c0 SB	93
	94	if (!(dir = opendir(packdir)))
	95	return;
	96
	97	while ((e = readdir(dir)) != NULL) {
26936bfd JK	98	size_t len;
26936bfd JK	99	if (!strip_suffix(e->d_name, ".pack", &len))
a1bbc6c0 SB	100	continue;
a1bbc6c0 SB	101
a1bbc6c0 SB	102	fname = xmemdupz(e->d_name, len);
	103
	104	if (!file_exists(mkpath("%s/%s.keep", packdir, fname)))
	105	string_list_append_nodup(fname_list, fname);
	106	else
	107	free(fname);
	108	}
	109	closedir(dir);
	110	}
	111
	112	static void remove_redundant_pack(const char dir_name, const char base_name)
	113	{
5cf2741c	114	const char *exts[] = {".pack", ".idx", ".keep", ".bitmap"};
a1bbc6c0 SB	115	int i;
	116	struct strbuf buf = STRBUF_INIT;
	117	size_t plen;
	118
	119	strbuf_addf(&buf, "%s/%s", dir_name, base_name);
	120	plen = buf.len;
	121
	122	for (i = 0; i < ARRAY_SIZE(exts); i++) {
	123	strbuf_setlen(&buf, plen);
	124	strbuf_addstr(&buf, exts[i]);
	125	unlink(buf.buf);
	126	}
	127	strbuf_release(&buf);
	128	}
	129
	130	#define ALL_INTO_ONE 1
	131	#define LOOSEN_UNREACHABLE 2
	132
	133	int cmd_repack(int argc, const char *argv, const char prefix)
	134	{
42a02d85 JK	135	struct {
42a02d85 JK	136	const char *name;
b77fcd1e	137	unsigned optional:1;
42a02d85 JK	138	} exts[] = {
	139	{".pack"},
	140	{".idx"},
5cf2741c	141	{".bitmap", 1},
42a02d85	142	};
d3180279	143	struct child_process cmd = CHILD_PROCESS_INIT;
a1bbc6c0	144	struct string_list_item *item;
a1bbc6c0 SB	145	struct string_list names = STRING_LIST_INIT_DUP;
	146	struct string_list rollback = STRING_LIST_INIT_NODUP;
	147	struct string_list existing_packs = STRING_LIST_INIT_DUP;
	148	struct strbuf line = STRBUF_INIT;
3e7b066e	149	int ext, ret, failed;
a1bbc6c0 SB	150	FILE *out;
	151
	152	/* variables to be filled by option parsing */
	153	int pack_everything = 0;
	154	int delete_redundant = 0;
aa8bd519	155	const char *unpack_unreachable = NULL;
905f27b8	156	int keep_unreachable = 0;
b861e235 JK	157	const char window = NULL, window_memory = NULL;
	158	const char *depth = NULL;
	159	const char *max_pack_size = NULL;
a1bbc6c0 SB	160	int no_reuse_delta = 0, no_reuse_object = 0;
	161	int no_update_server_info = 0;
	162	int quiet = 0;
	163	int local = 0;
	164
	165	struct option builtin_repack_options[] = {
	166	OPT_BIT('a', NULL, &pack_everything,
	167	N_("pack everything in a single pack"), ALL_INTO_ONE),
	168	OPT_BIT('A', NULL, &pack_everything,
	169	N_("same as -a, and turn unreachable objects loose"),
	170	LOOSEN_UNREACHABLE \| ALL_INTO_ONE),
	171	OPT_BOOL('d', NULL, &delete_redundant,
	172	N_("remove redundant packs, and run git-prune-packed")),
	173	OPT_BOOL('f', NULL, &no_reuse_delta,
	174	N_("pass --no-reuse-delta to git-pack-objects")),
	175	OPT_BOOL('F', NULL, &no_reuse_object,
	176	N_("pass --no-reuse-object to git-pack-objects")),
	177	OPT_BOOL('n', NULL, &no_update_server_info,
	178	N_("do not run git-update-server-info")),
	179	OPT__QUIET(&quiet, N_("be quiet")),
	180	OPT_BOOL('l', "local", &local,
	181	N_("pass --local to git-pack-objects")),
d078d85b	182	OPT_BOOL('b', "write-bitmap-index", &write_bitmaps,
5cf2741c	183	N_("write bitmap index")),
a1bbc6c0 SB	184	OPT_STRING(0, "unpack-unreachable", &unpack_unreachable, N_("approxidate"),
a1bbc6c0 SB	185	N_("with -A, do not loosen objects older than this")),
905f27b8 JK	186	OPT_BOOL('k', "keep-unreachable", &keep_unreachable,
905f27b8 JK	187	N_("with -a, repack unreachable objects")),
b861e235	188	OPT_STRING(0, "window", &window, N_("n"),
a1bbc6c0	189	N_("size of the window used for delta compression")),
b861e235	190	OPT_STRING(0, "window-memory", &window_memory, N_("bytes"),
a1bbc6c0	191	N_("same as the above, but limit memory size instead of entries count")),
b861e235	192	OPT_STRING(0, "depth", &depth, N_("n"),
a1bbc6c0	193	N_("limits the maximum delta depth")),
b861e235	194	OPT_STRING(0, "max-pack-size", &max_pack_size, N_("bytes"),
a1bbc6c0	195	N_("maximum size of each packfile")),
ee34a2be JK	196	OPT_BOOL(0, "pack-kept-objects", &pack_kept_objects,
ee34a2be JK	197	N_("repack objects in packs marked with .keep")),
a1bbc6c0 SB	198	OPT_END()
	199	};
	200
	201	git_config(repack_config, NULL);
	202
	203	argc = parse_options(argc, argv, prefix, builtin_repack_options,
	204	git_repack_usage, 0);
	205
067fbd41 JK	206	if (delete_redundant && repository_format_precious_objects)
	207	die(_("cannot delete packs in a precious-objects repo"));
	208
905f27b8 JK	209	if (keep_unreachable &&
	210	(unpack_unreachable \|\| (pack_everything & LOOSEN_UNREACHABLE)))
	211	die(_("--keep-unreachable and -A are incompatible"));
	212
ee34a2be	213	if (pack_kept_objects < 0)
2bed2d47	214	pack_kept_objects = write_bitmaps;
ee34a2be	215
1c409a70 DT	216	if (write_bitmaps && !(pack_everything & ALL_INTO_ONE))
	217	die(_(incremental_bitmap_conflict_error));
	218
a1bbc6c0 SB	219	packdir = mkpathdup("%s/pack", get_object_directory());
	220	packtmp = mkpathdup("%s/.tmp-%d-pack", packdir, (int)getpid());
	221
	222	sigchain_push_common(remove_pack_on_signal);
	223
a2bae2dc RS	224	argv_array_push(&cmd.args, "pack-objects");
a2bae2dc RS	225	argv_array_push(&cmd.args, "--keep-true-parents");
ee34a2be	226	if (!pack_kept_objects)
a2bae2dc RS	227	argv_array_push(&cmd.args, "--honor-pack-keep");
	228	argv_array_push(&cmd.args, "--non-empty");
	229	argv_array_push(&cmd.args, "--all");
	230	argv_array_push(&cmd.args, "--reflog");
	231	argv_array_push(&cmd.args, "--indexed-objects");
a1bbc6c0	232	if (window)
a2bae2dc	233	argv_array_pushf(&cmd.args, "--window=%s", window);
a1bbc6c0	234	if (window_memory)
a2bae2dc	235	argv_array_pushf(&cmd.args, "--window-memory=%s", window_memory);
a1bbc6c0	236	if (depth)
a2bae2dc	237	argv_array_pushf(&cmd.args, "--depth=%s", depth);
a1bbc6c0	238	if (max_pack_size)
a2bae2dc	239	argv_array_pushf(&cmd.args, "--max-pack-size=%s", max_pack_size);
a1bbc6c0	240	if (no_reuse_delta)
a2bae2dc	241	argv_array_pushf(&cmd.args, "--no-reuse-delta");
a1bbc6c0	242	if (no_reuse_object)
a2bae2dc	243	argv_array_pushf(&cmd.args, "--no-reuse-object");
2bed2d47	244	if (write_bitmaps)
a2bae2dc	245	argv_array_push(&cmd.args, "--write-bitmap-index");
a1bbc6c0 SB	246
	247	if (pack_everything & ALL_INTO_ONE) {
	248	get_non_kept_pack_filenames(&existing_packs);
	249
	250	if (existing_packs.nr && delete_redundant) {
8d422993	251	if (unpack_unreachable) {
a2bae2dc	252	argv_array_pushf(&cmd.args,
a1bbc6c0 SB	253	"--unpack-unreachable=%s",
a1bbc6c0 SB	254	unpack_unreachable);
8d422993 JK	255	argv_array_push(&cmd.env_array, "GIT_REF_PARANOIA=1");
8d422993 JK	256	} else if (pack_everything & LOOSEN_UNREACHABLE) {
a2bae2dc	257	argv_array_push(&cmd.args,
a1bbc6c0	258	"--unpack-unreachable");
905f27b8 JK	259	} else if (keep_unreachable) {
905f27b8 JK	260	argv_array_push(&cmd.args, "--keep-unreachable");
e26a8c47	261	argv_array_push(&cmd.args, "--pack-loose-unreachable");
8d422993 JK	262	} else {
	263	argv_array_push(&cmd.env_array, "GIT_REF_PARANOIA=1");
	264	}
a1bbc6c0 SB	265	}
a1bbc6c0 SB	266	} else {
a2bae2dc RS	267	argv_array_push(&cmd.args, "--unpacked");
a2bae2dc RS	268	argv_array_push(&cmd.args, "--incremental");
a1bbc6c0 SB	269	}
	270
	271	if (local)
a2bae2dc	272	argv_array_push(&cmd.args, "--local");
a1bbc6c0	273	if (quiet)
a2bae2dc	274	argv_array_push(&cmd.args, "--quiet");
a1bbc6c0	275	if (delta_base_offset)
a2bae2dc	276	argv_array_push(&cmd.args, "--delta-base-offset");
a1bbc6c0	277
a2bae2dc	278	argv_array_push(&cmd.args, packtmp);
a1bbc6c0	279
a1bbc6c0 SB	280	cmd.git_cmd = 1;
	281	cmd.out = -1;
	282	cmd.no_stdin = 1;
	283
	284	ret = start_command(&cmd);
	285	if (ret)
ffc9329f	286	return ret;
a1bbc6c0	287
a1bbc6c0	288	out = xfdopen(cmd.out, "r");
8f309aeb	289	while (strbuf_getline_lf(&line, out) != EOF) {
a1bbc6c0 SB	290	if (line.len != 40)
	291	die("repack: Expecting 40 character sha1 lines only from pack-objects.");
	292	string_list_append(&names, line.buf);
a1bbc6c0 SB	293	}
	294	fclose(out);
	295	ret = finish_command(&cmd);
	296	if (ret)
ffc9329f	297	return ret;
a1bbc6c0	298
3e7b066e	299	if (!names.nr && !quiet)
a1bbc6c0 SB	300	printf("Nothing new to pack.\n");
	301
	302	/*
	303	* Ok we have prepared all new packfiles.
	304	* First see if there are packs of the same name and if so
	305	* if we can move them out of the way (this can happen if we
	306	* repacked immediately after packing fully.
	307	*/
	308	failed = 0;
	309	for_each_string_list_item(item, &names) {
b328c216	310	for (ext = 0; ext < ARRAY_SIZE(exts); ext++) {
e3cf2303	311	char fname, fname_old;
9d7fbfd2	312	fname = mkpathdup("%s/pack-%s%s", packdir,
42a02d85	313	item->string, exts[ext].name);
a1bbc6c0 SB	314	if (!file_exists(fname)) {
	315	free(fname);
	316	continue;
	317	}
	318
e3cf2303	319	fname_old = mkpathdup("%s/old-%s%s", packdir,
42a02d85	320	item->string, exts[ext].name);
a1bbc6c0 SB	321	if (file_exists(fname_old))
	322	if (unlink(fname_old))
	323	failed = 1;
	324
	325	if (!failed && rename(fname, fname_old)) {
	326	free(fname);
e3cf2303	327	free(fname_old);
a1bbc6c0 SB	328	failed = 1;
	329	break;
	330	} else {
	331	string_list_append(&rollback, fname);
e3cf2303	332	free(fname_old);
a1bbc6c0 SB	333	}
	334	}
	335	if (failed)
	336	break;
	337	}
	338	if (failed) {
	339	struct string_list rollback_failure = STRING_LIST_INIT_DUP;
	340	for_each_string_list_item(item, &rollback) {
e3cf2303	341	char fname, fname_old;
a1bbc6c0	342	fname = mkpathdup("%s/%s", packdir, item->string);
e3cf2303	343	fname_old = mkpathdup("%s/old-%s", packdir, item->string);
a1bbc6c0 SB	344	if (rename(fname_old, fname))
	345	string_list_append(&rollback_failure, fname);
	346	free(fname);
e3cf2303	347	free(fname_old);
a1bbc6c0 SB	348	}
	349
	350	if (rollback_failure.nr) {
	351	int i;
	352	fprintf(stderr,
	353	"WARNING: Some packs in use have been renamed by\n"
	354	"WARNING: prefixing old- to their name, in order to\n"
	355	"WARNING: replace them with the new version of the\n"
	356	"WARNING: file. But the operation failed, and the\n"
	357	"WARNING: attempt to rename them back to their\n"
	358	"WARNING: original names also failed.\n"
	359	"WARNING: Please rename them in %s manually:\n", packdir);
	360	for (i = 0; i < rollback_failure.nr; i++)
	361	fprintf(stderr, "WARNING: old-%s -> %s\n",
	362	rollback_failure.items[i].string,
	363	rollback_failure.items[i].string);
	364	}
	365	exit(1);
	366	}
	367
	368	/* Now the ones with the same name are out of the way... */
	369	for_each_string_list_item(item, &names) {
b328c216	370	for (ext = 0; ext < ARRAY_SIZE(exts); ext++) {
a1bbc6c0 SB	371	char fname, fname_old;
a1bbc6c0 SB	372	struct stat statbuffer;
b77fcd1e	373	int exists = 0;
a1bbc6c0	374	fname = mkpathdup("%s/pack-%s%s",
42a02d85	375	packdir, item->string, exts[ext].name);
a1bbc6c0	376	fname_old = mkpathdup("%s-%s%s",
42a02d85	377	packtmp, item->string, exts[ext].name);
a1bbc6c0 SB	378	if (!stat(fname_old, &statbuffer)) {
	379	statbuffer.st_mode &= ~(S_IWUSR \| S_IWGRP \| S_IWOTH);
	380	chmod(fname_old, statbuffer.st_mode);
b77fcd1e JK	381	exists = 1;
	382	}
	383	if (exists \|\| !exts[ext].optional) {
	384	if (rename(fname_old, fname))
	385	die_errno(_("renaming '%s' failed"), fname_old);
a1bbc6c0	386	}
a1bbc6c0 SB	387	free(fname);
	388	free(fname_old);
	389	}
	390	}
	391
	392	/* Remove the "old-" files */
	393	for_each_string_list_item(item, &names) {
b328c216	394	for (ext = 0; ext < ARRAY_SIZE(exts); ext++) {
e3cf2303 JK	395	char *fname;
	396	fname = mkpathdup("%s/old-%s%s",
	397	packdir,
	398	item->string,
	399	exts[ext].name);
0b63c6a5	400	if (remove_path(fname))
e923a8ab	401	warning(_("failed to remove '%s'"), fname);
e3cf2303	402	free(fname);
a1bbc6c0 SB	403	}
	404	}
	405
	406	/* End of pack replacement. */
	407
	408	if (delete_redundant) {
4489a480	409	int opts = 0;
3383e199	410	string_list_sort(&names);
a1bbc6c0 SB	411	for_each_string_list_item(item, &existing_packs) {
	412	char *sha1;
	413	size_t len = strlen(item->string);
	414	if (len < 40)
	415	continue;
	416	sha1 = item->string + len - 40;
	417	if (!string_list_has_string(&names, sha1))
	418	remove_redundant_pack(packdir, item->string);
	419	}
4489a480 RS	420	if (!quiet && isatty(2))
	421	opts \|= PRUNE_PACKED_VERBOSE;
	422	prune_packed_objects(opts);
a1bbc6c0 SB	423	}
a1bbc6c0 SB	424
4489a480 RS	425	if (!no_update_server_info)
4489a480 RS	426	update_server_info(0);
a1bbc6c0 SB	427	remove_temporary_files();
	428	string_list_clear(&names, 0);
	429	string_list_clear(&rollback, 0);
	430	string_list_clear(&existing_packs, 0);
	431	strbuf_release(&line);
	432
	433	return 0;
	434	}