[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 int use_delta_islands;
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;
	}
	if (!strcmp(var, "repack.usedeltaislands")) {
		use_delta_islands = 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 or .promisor file. These packs are not to
 * be kept if we are going to pack everything into one file.
 */
static void get_non_kept_pack_filenames(struct string_list *fname_list,
					const struct string_list *extra_keep)
{
	DIR *dir;
	struct dirent *e;
	char *fname;

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

	while ((e = readdir(dir)) != NULL) {
		size_t len;
		int i;

		for (i = 0; i < extra_keep->nr; i++)
			if (!fspathcmp(e->d_name, extra_keep->items[i].string))
				break;
		if (extra_keep->nr > 0 && i < extra_keep->nr)
			continue;

		if (!strip_suffix(e->d_name, ".pack", &len))
			continue;

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

		if (!file_exists(mkpath("%s/%s.keep", packdir, fname)) &&
		    !file_exists(mkpath("%s/%s.promisor", 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 i, 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 *threads = NULL;
	const char *max_pack_size = NULL;
	struct string_list keep_pack_list = STRING_LIST_INIT_NODUP;
	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_BOOL('i', "delta-islands", &use_delta_islands,
				N_("pass --delta-islands to git-pack-objects")),
		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, "threads", &threads, N_("n"),
				N_("limits the maximum number of threads")),
		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_STRING_LIST(0, "keep-pack", &keep_pack_list, N_("name"),
				N_("do not repack this pack")),
		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");
	for (i = 0; i < keep_pack_list.nr; i++)
		argv_array_pushf(&cmd.args, "--keep-pack=%s",
				 keep_pack_list.items[i].string);
	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 (repository_format_partial_clone)
		argv_array_push(&cmd.args, "--exclude-promisor-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 (threads)
		argv_array_pushf(&cmd.args, "--threads=%s", threads);
	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 (use_delta_islands)
		argv_array_push(&cmd.args, "--delta-islands");

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

		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;
16d75fa4	15	static int use_delta_islands;
a1bbc6c0 SB	16	static char packdir, packtmp;
	17
	18	static const char *const git_repack_usage[] = {
9c9b4f2f	19	N_("git repack [<options>]"),
a1bbc6c0 SB	20	NULL
	21	};
	22
1c409a70 DT	23	static const char incremental_bitmap_conflict_error[] = N_(
	24	"Incremental repacks are incompatible with bitmap indexes. Use\n"
	25	"--no-write-bitmap-index or disable the pack.writebitmaps configuration."
	26	);
	27
	28
a1bbc6c0 SB	29	static int repack_config(const char var, const char value, void *cb)
	30	{
	31	if (!strcmp(var, "repack.usedeltabaseoffset")) {
	32	delta_base_offset = git_config_bool(var, value);
	33	return 0;
	34	}
ee34a2be JK	35	if (!strcmp(var, "repack.packkeptobjects")) {
	36	pack_kept_objects = git_config_bool(var, value);
	37	return 0;
	38	}
71d76cb4 JK	39	if (!strcmp(var, "repack.writebitmaps") \|\|
71d76cb4 JK	40	!strcmp(var, "pack.writebitmaps")) {
d078d85b	41	write_bitmaps = git_config_bool(var, value);
3198b89f JK	42	return 0;
3198b89f JK	43	}
16d75fa4 JK	44	if (!strcmp(var, "repack.usedeltaislands")) {
	45	use_delta_islands = git_config_bool(var, value);
	46	return 0;
	47	}
a1bbc6c0 SB	48	return git_default_config(var, value, cb);
	49	}
	50
	51	/*
	52	* Remove temporary $GIT_OBJECT_DIRECTORY/pack/.tmp-$$-pack-* files.
	53	*/
	54	static void remove_temporary_files(void)
	55	{
	56	struct strbuf buf = STRBUF_INIT;
	57	size_t dirlen, prefixlen;
	58	DIR *dir;
	59	struct dirent *e;
	60
	61	dir = opendir(packdir);
	62	if (!dir)
	63	return;
	64
	65	/* Point at the slash at the end of ".../objects/pack/" */
	66	dirlen = strlen(packdir) + 1;
	67	strbuf_addstr(&buf, packtmp);
	68	/* Hold the length of ".tmp-%d-pack-" */
	69	prefixlen = buf.len - dirlen;
	70
	71	while ((e = readdir(dir))) {
	72	if (strncmp(e->d_name, buf.buf + dirlen, prefixlen))
	73	continue;
	74	strbuf_setlen(&buf, dirlen);
	75	strbuf_addstr(&buf, e->d_name);
	76	unlink(buf.buf);
	77	}
	78	closedir(dir);
	79	strbuf_release(&buf);
	80	}
	81
	82	static void remove_pack_on_signal(int signo)
	83	{
	84	remove_temporary_files();
	85	sigchain_pop(signo);
	86	raise(signo);
	87	}
	88
	89	/*
	90	* Adds all packs hex strings to the fname list, which do not
0c16cd49 JT	91	* have a corresponding .keep or .promisor file. These packs are not to
0c16cd49 JT	92	* be kept if we are going to pack everything into one file.
a1bbc6c0	93	*/
ed7e5fc3 NTND	94	static void get_non_kept_pack_filenames(struct string_list *fname_list,
ed7e5fc3 NTND	95	const struct string_list *extra_keep)
a1bbc6c0 SB	96	{
	97	DIR *dir;
	98	struct dirent *e;
	99	char *fname;
a1bbc6c0 SB	100
	101	if (!(dir = opendir(packdir)))
	102	return;
	103
	104	while ((e = readdir(dir)) != NULL) {
26936bfd	105	size_t len;
ed7e5fc3 NTND	106	int i;
	107
	108	for (i = 0; i < extra_keep->nr; i++)
	109	if (!fspathcmp(e->d_name, extra_keep->items[i].string))
	110	break;
	111	if (extra_keep->nr > 0 && i < extra_keep->nr)
	112	continue;
	113
26936bfd	114	if (!strip_suffix(e->d_name, ".pack", &len))
a1bbc6c0 SB	115	continue;
a1bbc6c0 SB	116
a1bbc6c0 SB	117	fname = xmemdupz(e->d_name, len);
a1bbc6c0 SB	118
0c16cd49 JT	119	if (!file_exists(mkpath("%s/%s.keep", packdir, fname)) &&
0c16cd49 JT	120	!file_exists(mkpath("%s/%s.promisor", packdir, fname)))
a1bbc6c0 SB	121	string_list_append_nodup(fname_list, fname);
	122	else
	123	free(fname);
	124	}
	125	closedir(dir);
	126	}
	127
	128	static void remove_redundant_pack(const char dir_name, const char base_name)
	129	{
5cf2741c	130	const char *exts[] = {".pack", ".idx", ".keep", ".bitmap"};
a1bbc6c0 SB	131	int i;
	132	struct strbuf buf = STRBUF_INIT;
	133	size_t plen;
	134
	135	strbuf_addf(&buf, "%s/%s", dir_name, base_name);
	136	plen = buf.len;
	137
	138	for (i = 0; i < ARRAY_SIZE(exts); i++) {
	139	strbuf_setlen(&buf, plen);
	140	strbuf_addstr(&buf, exts[i]);
	141	unlink(buf.buf);
	142	}
	143	strbuf_release(&buf);
	144	}
	145
	146	#define ALL_INTO_ONE 1
	147	#define LOOSEN_UNREACHABLE 2
	148
	149	int cmd_repack(int argc, const char *argv, const char prefix)
	150	{
42a02d85 JK	151	struct {
42a02d85 JK	152	const char *name;
b77fcd1e	153	unsigned optional:1;
42a02d85 JK	154	} exts[] = {
	155	{".pack"},
	156	{".idx"},
5cf2741c	157	{".bitmap", 1},
42a02d85	158	};
d3180279	159	struct child_process cmd = CHILD_PROCESS_INIT;
a1bbc6c0	160	struct string_list_item *item;
a1bbc6c0 SB	161	struct string_list names = STRING_LIST_INIT_DUP;
	162	struct string_list rollback = STRING_LIST_INIT_NODUP;
	163	struct string_list existing_packs = STRING_LIST_INIT_DUP;
	164	struct strbuf line = STRBUF_INIT;
ed7e5fc3	165	int i, ext, ret, failed;
a1bbc6c0 SB	166	FILE *out;
	167
	168	/* variables to be filled by option parsing */
	169	int pack_everything = 0;
	170	int delete_redundant = 0;
aa8bd519	171	const char *unpack_unreachable = NULL;
905f27b8	172	int keep_unreachable = 0;
b861e235 JK	173	const char window = NULL, window_memory = NULL;
b861e235 JK	174	const char *depth = NULL;
40bcf318	175	const char *threads = NULL;
b861e235	176	const char *max_pack_size = NULL;
ed7e5fc3	177	struct string_list keep_pack_list = STRING_LIST_INIT_NODUP;
a1bbc6c0 SB	178	int no_reuse_delta = 0, no_reuse_object = 0;
	179	int no_update_server_info = 0;
	180	int quiet = 0;
	181	int local = 0;
	182
	183	struct option builtin_repack_options[] = {
	184	OPT_BIT('a', NULL, &pack_everything,
	185	N_("pack everything in a single pack"), ALL_INTO_ONE),
	186	OPT_BIT('A', NULL, &pack_everything,
	187	N_("same as -a, and turn unreachable objects loose"),
	188	LOOSEN_UNREACHABLE \| ALL_INTO_ONE),
	189	OPT_BOOL('d', NULL, &delete_redundant,
	190	N_("remove redundant packs, and run git-prune-packed")),
	191	OPT_BOOL('f', NULL, &no_reuse_delta,
	192	N_("pass --no-reuse-delta to git-pack-objects")),
	193	OPT_BOOL('F', NULL, &no_reuse_object,
	194	N_("pass --no-reuse-object to git-pack-objects")),
	195	OPT_BOOL('n', NULL, &no_update_server_info,
	196	N_("do not run git-update-server-info")),
	197	OPT__QUIET(&quiet, N_("be quiet")),
	198	OPT_BOOL('l', "local", &local,
	199	N_("pass --local to git-pack-objects")),
d078d85b	200	OPT_BOOL('b', "write-bitmap-index", &write_bitmaps,
5cf2741c	201	N_("write bitmap index")),
16d75fa4 JK	202	OPT_BOOL('i', "delta-islands", &use_delta_islands,
16d75fa4 JK	203	N_("pass --delta-islands to git-pack-objects")),
a1bbc6c0 SB	204	OPT_STRING(0, "unpack-unreachable", &unpack_unreachable, N_("approxidate"),
a1bbc6c0 SB	205	N_("with -A, do not loosen objects older than this")),
905f27b8 JK	206	OPT_BOOL('k', "keep-unreachable", &keep_unreachable,
905f27b8 JK	207	N_("with -a, repack unreachable objects")),
b861e235	208	OPT_STRING(0, "window", &window, N_("n"),
a1bbc6c0	209	N_("size of the window used for delta compression")),
b861e235	210	OPT_STRING(0, "window-memory", &window_memory, N_("bytes"),
a1bbc6c0	211	N_("same as the above, but limit memory size instead of entries count")),
b861e235	212	OPT_STRING(0, "depth", &depth, N_("n"),
a1bbc6c0	213	N_("limits the maximum delta depth")),
40bcf318 JH	214	OPT_STRING(0, "threads", &threads, N_("n"),
40bcf318 JH	215	N_("limits the maximum number of threads")),
b861e235	216	OPT_STRING(0, "max-pack-size", &max_pack_size, N_("bytes"),
a1bbc6c0	217	N_("maximum size of each packfile")),
ee34a2be JK	218	OPT_BOOL(0, "pack-kept-objects", &pack_kept_objects,
ee34a2be JK	219	N_("repack objects in packs marked with .keep")),
ed7e5fc3 NTND	220	OPT_STRING_LIST(0, "keep-pack", &keep_pack_list, N_("name"),
ed7e5fc3 NTND	221	N_("do not repack this pack")),
a1bbc6c0 SB	222	OPT_END()
	223	};
	224
	225	git_config(repack_config, NULL);
	226
	227	argc = parse_options(argc, argv, prefix, builtin_repack_options,
	228	git_repack_usage, 0);
	229
067fbd41 JK	230	if (delete_redundant && repository_format_precious_objects)
	231	die(_("cannot delete packs in a precious-objects repo"));
	232
905f27b8 JK	233	if (keep_unreachable &&
	234	(unpack_unreachable \|\| (pack_everything & LOOSEN_UNREACHABLE)))
	235	die(_("--keep-unreachable and -A are incompatible"));
	236
ee34a2be	237	if (pack_kept_objects < 0)
2bed2d47	238	pack_kept_objects = write_bitmaps;
ee34a2be	239
1c409a70 DT	240	if (write_bitmaps && !(pack_everything & ALL_INTO_ONE))
	241	die(_(incremental_bitmap_conflict_error));
	242
a1bbc6c0 SB	243	packdir = mkpathdup("%s/pack", get_object_directory());
	244	packtmp = mkpathdup("%s/.tmp-%d-pack", packdir, (int)getpid());
	245
	246	sigchain_push_common(remove_pack_on_signal);
	247
a2bae2dc RS	248	argv_array_push(&cmd.args, "pack-objects");
a2bae2dc RS	249	argv_array_push(&cmd.args, "--keep-true-parents");
ee34a2be	250	if (!pack_kept_objects)
a2bae2dc	251	argv_array_push(&cmd.args, "--honor-pack-keep");
ed7e5fc3 NTND	252	for (i = 0; i < keep_pack_list.nr; i++)
	253	argv_array_pushf(&cmd.args, "--keep-pack=%s",
	254	keep_pack_list.items[i].string);
a2bae2dc RS	255	argv_array_push(&cmd.args, "--non-empty");
	256	argv_array_push(&cmd.args, "--all");
	257	argv_array_push(&cmd.args, "--reflog");
	258	argv_array_push(&cmd.args, "--indexed-objects");
0c16cd49 JT	259	if (repository_format_partial_clone)
0c16cd49 JT	260	argv_array_push(&cmd.args, "--exclude-promisor-objects");
a1bbc6c0	261	if (window)
a2bae2dc	262	argv_array_pushf(&cmd.args, "--window=%s", window);
a1bbc6c0	263	if (window_memory)
a2bae2dc	264	argv_array_pushf(&cmd.args, "--window-memory=%s", window_memory);
a1bbc6c0	265	if (depth)
a2bae2dc	266	argv_array_pushf(&cmd.args, "--depth=%s", depth);
40bcf318 JH	267	if (threads)
40bcf318 JH	268	argv_array_pushf(&cmd.args, "--threads=%s", threads);
a1bbc6c0	269	if (max_pack_size)
a2bae2dc	270	argv_array_pushf(&cmd.args, "--max-pack-size=%s", max_pack_size);
a1bbc6c0	271	if (no_reuse_delta)
a2bae2dc	272	argv_array_pushf(&cmd.args, "--no-reuse-delta");
a1bbc6c0	273	if (no_reuse_object)
a2bae2dc	274	argv_array_pushf(&cmd.args, "--no-reuse-object");
2bed2d47	275	if (write_bitmaps)
a2bae2dc	276	argv_array_push(&cmd.args, "--write-bitmap-index");
16d75fa4 JK	277	if (use_delta_islands)
16d75fa4 JK	278	argv_array_push(&cmd.args, "--delta-islands");
a1bbc6c0 SB	279
a1bbc6c0 SB	280	if (pack_everything & ALL_INTO_ONE) {
ed7e5fc3	281	get_non_kept_pack_filenames(&existing_packs, &keep_pack_list);
a1bbc6c0 SB	282
a1bbc6c0 SB	283	if (existing_packs.nr && delete_redundant) {
8d422993	284	if (unpack_unreachable) {
a2bae2dc	285	argv_array_pushf(&cmd.args,
a1bbc6c0 SB	286	"--unpack-unreachable=%s",
a1bbc6c0 SB	287	unpack_unreachable);
8d422993 JK	288	argv_array_push(&cmd.env_array, "GIT_REF_PARANOIA=1");
8d422993 JK	289	} else if (pack_everything & LOOSEN_UNREACHABLE) {
a2bae2dc	290	argv_array_push(&cmd.args,
a1bbc6c0	291	"--unpack-unreachable");
905f27b8 JK	292	} else if (keep_unreachable) {
905f27b8 JK	293	argv_array_push(&cmd.args, "--keep-unreachable");
e26a8c47	294	argv_array_push(&cmd.args, "--pack-loose-unreachable");
8d422993 JK	295	} else {
	296	argv_array_push(&cmd.env_array, "GIT_REF_PARANOIA=1");
	297	}
a1bbc6c0 SB	298	}
a1bbc6c0 SB	299	} else {
a2bae2dc RS	300	argv_array_push(&cmd.args, "--unpacked");
a2bae2dc RS	301	argv_array_push(&cmd.args, "--incremental");
a1bbc6c0 SB	302	}
	303
	304	if (local)
a2bae2dc	305	argv_array_push(&cmd.args, "--local");
a1bbc6c0	306	if (quiet)
a2bae2dc	307	argv_array_push(&cmd.args, "--quiet");
a1bbc6c0	308	if (delta_base_offset)
a2bae2dc	309	argv_array_push(&cmd.args, "--delta-base-offset");
a1bbc6c0	310
a2bae2dc	311	argv_array_push(&cmd.args, packtmp);
a1bbc6c0	312
a1bbc6c0 SB	313	cmd.git_cmd = 1;
	314	cmd.out = -1;
	315	cmd.no_stdin = 1;
	316
	317	ret = start_command(&cmd);
	318	if (ret)
ffc9329f	319	return ret;
a1bbc6c0	320
a1bbc6c0	321	out = xfdopen(cmd.out, "r");
8f309aeb	322	while (strbuf_getline_lf(&line, out) != EOF) {
a1bbc6c0 SB	323	if (line.len != 40)
	324	die("repack: Expecting 40 character sha1 lines only from pack-objects.");
	325	string_list_append(&names, line.buf);
a1bbc6c0 SB	326	}
	327	fclose(out);
	328	ret = finish_command(&cmd);
	329	if (ret)
ffc9329f	330	return ret;
a1bbc6c0	331
3e7b066e	332	if (!names.nr && !quiet)
a1bbc6c0 SB	333	printf("Nothing new to pack.\n");
	334
	335	/*
	336	* Ok we have prepared all new packfiles.
	337	* First see if there are packs of the same name and if so
	338	* if we can move them out of the way (this can happen if we
	339	* repacked immediately after packing fully.
	340	*/
	341	failed = 0;
	342	for_each_string_list_item(item, &names) {
b328c216	343	for (ext = 0; ext < ARRAY_SIZE(exts); ext++) {
e3cf2303	344	char fname, fname_old;
9d7fbfd2	345	fname = mkpathdup("%s/pack-%s%s", packdir,
42a02d85	346	item->string, exts[ext].name);
a1bbc6c0 SB	347	if (!file_exists(fname)) {
	348	free(fname);
	349	continue;
	350	}
	351
e3cf2303	352	fname_old = mkpathdup("%s/old-%s%s", packdir,
42a02d85	353	item->string, exts[ext].name);
a1bbc6c0 SB	354	if (file_exists(fname_old))
	355	if (unlink(fname_old))
	356	failed = 1;
	357
	358	if (!failed && rename(fname, fname_old)) {
	359	free(fname);
e3cf2303	360	free(fname_old);
a1bbc6c0 SB	361	failed = 1;
	362	break;
	363	} else {
	364	string_list_append(&rollback, fname);
e3cf2303	365	free(fname_old);
a1bbc6c0 SB	366	}
	367	}
	368	if (failed)
	369	break;
	370	}
	371	if (failed) {
	372	struct string_list rollback_failure = STRING_LIST_INIT_DUP;
	373	for_each_string_list_item(item, &rollback) {
e3cf2303	374	char fname, fname_old;
a1bbc6c0	375	fname = mkpathdup("%s/%s", packdir, item->string);
e3cf2303	376	fname_old = mkpathdup("%s/old-%s", packdir, item->string);
a1bbc6c0 SB	377	if (rename(fname_old, fname))
	378	string_list_append(&rollback_failure, fname);
	379	free(fname);
e3cf2303	380	free(fname_old);
a1bbc6c0 SB	381	}
	382
	383	if (rollback_failure.nr) {
	384	int i;
	385	fprintf(stderr,
	386	"WARNING: Some packs in use have been renamed by\n"
	387	"WARNING: prefixing old- to their name, in order to\n"
	388	"WARNING: replace them with the new version of the\n"
	389	"WARNING: file. But the operation failed, and the\n"
	390	"WARNING: attempt to rename them back to their\n"
	391	"WARNING: original names also failed.\n"
	392	"WARNING: Please rename them in %s manually:\n", packdir);
	393	for (i = 0; i < rollback_failure.nr; i++)
	394	fprintf(stderr, "WARNING: old-%s -> %s\n",
	395	rollback_failure.items[i].string,
	396	rollback_failure.items[i].string);
	397	}
	398	exit(1);
	399	}
	400
	401	/* Now the ones with the same name are out of the way... */
	402	for_each_string_list_item(item, &names) {
b328c216	403	for (ext = 0; ext < ARRAY_SIZE(exts); ext++) {
a1bbc6c0 SB	404	char fname, fname_old;
a1bbc6c0 SB	405	struct stat statbuffer;
b77fcd1e	406	int exists = 0;
a1bbc6c0	407	fname = mkpathdup("%s/pack-%s%s",
42a02d85	408	packdir, item->string, exts[ext].name);
a1bbc6c0	409	fname_old = mkpathdup("%s-%s%s",
42a02d85	410	packtmp, item->string, exts[ext].name);
a1bbc6c0 SB	411	if (!stat(fname_old, &statbuffer)) {
	412	statbuffer.st_mode &= ~(S_IWUSR \| S_IWGRP \| S_IWOTH);
	413	chmod(fname_old, statbuffer.st_mode);
b77fcd1e JK	414	exists = 1;
	415	}
	416	if (exists \|\| !exts[ext].optional) {
	417	if (rename(fname_old, fname))
	418	die_errno(_("renaming '%s' failed"), fname_old);
a1bbc6c0	419	}
a1bbc6c0 SB	420	free(fname);
	421	free(fname_old);
	422	}
	423	}
	424
	425	/* Remove the "old-" files */
	426	for_each_string_list_item(item, &names) {
b328c216	427	for (ext = 0; ext < ARRAY_SIZE(exts); ext++) {
e3cf2303 JK	428	char *fname;
	429	fname = mkpathdup("%s/old-%s%s",
	430	packdir,
	431	item->string,
	432	exts[ext].name);
0b63c6a5	433	if (remove_path(fname))
e923a8ab	434	warning(_("failed to remove '%s'"), fname);
e3cf2303	435	free(fname);
a1bbc6c0 SB	436	}
	437	}
	438
	439	/* End of pack replacement. */
	440
	441	if (delete_redundant) {
4489a480	442	int opts = 0;
3383e199	443	string_list_sort(&names);
a1bbc6c0 SB	444	for_each_string_list_item(item, &existing_packs) {
	445	char *sha1;
	446	size_t len = strlen(item->string);
	447	if (len < 40)
	448	continue;
	449	sha1 = item->string + len - 40;
	450	if (!string_list_has_string(&names, sha1))
	451	remove_redundant_pack(packdir, item->string);
	452	}
4489a480 RS	453	if (!quiet && isatty(2))
	454	opts \|= PRUNE_PACKED_VERBOSE;
	455	prune_packed_objects(opts);
a1bbc6c0 SB	456	}
a1bbc6c0 SB	457
4489a480 RS	458	if (!no_update_server_info)
4489a480 RS	459	update_server_info(0);
a1bbc6c0 SB	460	remove_temporary_files();
	461	string_list_clear(&names, 0);
	462	string_list_clear(&rollback, 0);
	463	string_list_clear(&existing_packs, 0);
	464	strbuf_release(&line);
	465
	466	return 0;
	467	}