5 #include "parse-options.h"
6 #include "run-command.h"
9 #include "string-list.h"
10 #include "argv-array.h"
13 #include "object-store.h"
15 static int delta_base_offset
= 1;
16 static int pack_kept_objects
= -1;
17 static int write_bitmaps
;
18 static int use_delta_islands
;
19 static char *packdir
, *packtmp
;
21 static const char *const git_repack_usage
[] = {
22 N_("git repack [<options>]"),
26 static const char incremental_bitmap_conflict_error
[] = N_(
27 "Incremental repacks are incompatible with bitmap indexes. Use\n"
28 "--no-write-bitmap-index or disable the pack.writebitmaps configuration."
32 static int repack_config(const char *var
, const char *value
, void *cb
)
34 if (!strcmp(var
, "repack.usedeltabaseoffset")) {
35 delta_base_offset
= git_config_bool(var
, value
);
38 if (!strcmp(var
, "repack.packkeptobjects")) {
39 pack_kept_objects
= git_config_bool(var
, value
);
42 if (!strcmp(var
, "repack.writebitmaps") ||
43 !strcmp(var
, "pack.writebitmaps")) {
44 write_bitmaps
= git_config_bool(var
, value
);
47 if (!strcmp(var
, "repack.usedeltaislands")) {
48 use_delta_islands
= git_config_bool(var
, value
);
51 return git_default_config(var
, value
, cb
);
55 * Remove temporary $GIT_OBJECT_DIRECTORY/pack/.tmp-$$-pack-* files.
57 static void remove_temporary_files(void)
59 struct strbuf buf
= STRBUF_INIT
;
60 size_t dirlen
, prefixlen
;
64 dir
= opendir(packdir
);
68 /* Point at the slash at the end of ".../objects/pack/" */
69 dirlen
= strlen(packdir
) + 1;
70 strbuf_addstr(&buf
, packtmp
);
71 /* Hold the length of ".tmp-%d-pack-" */
72 prefixlen
= buf
.len
- dirlen
;
74 while ((e
= readdir(dir
))) {
75 if (strncmp(e
->d_name
, buf
.buf
+ dirlen
, prefixlen
))
77 strbuf_setlen(&buf
, dirlen
);
78 strbuf_addstr(&buf
, e
->d_name
);
85 static void remove_pack_on_signal(int signo
)
87 remove_temporary_files();
93 * Adds all packs hex strings to the fname list, which do not
94 * have a corresponding .keep file. These packs are not to
95 * be kept if we are going to pack everything into one file.
97 static void get_non_kept_pack_filenames(struct string_list
*fname_list
,
98 const struct string_list
*extra_keep
)
104 if (!(dir
= opendir(packdir
)))
107 while ((e
= readdir(dir
)) != NULL
) {
111 for (i
= 0; i
< extra_keep
->nr
; i
++)
112 if (!fspathcmp(e
->d_name
, extra_keep
->items
[i
].string
))
114 if (extra_keep
->nr
> 0 && i
< extra_keep
->nr
)
117 if (!strip_suffix(e
->d_name
, ".pack", &len
))
120 fname
= xmemdupz(e
->d_name
, len
);
122 if (!file_exists(mkpath("%s/%s.keep", packdir
, fname
)))
123 string_list_append_nodup(fname_list
, fname
);
130 static void remove_redundant_pack(const char *dir_name
, const char *base_name
)
132 const char *exts
[] = {".pack", ".idx", ".keep", ".bitmap", ".promisor"};
134 struct strbuf buf
= STRBUF_INIT
;
137 strbuf_addf(&buf
, "%s/%s", dir_name
, base_name
);
140 for (i
= 0; i
< ARRAY_SIZE(exts
); i
++) {
141 strbuf_setlen(&buf
, plen
);
142 strbuf_addstr(&buf
, exts
[i
]);
145 strbuf_release(&buf
);
148 struct pack_objects_args
{
150 const char *window_memory
;
153 const char *max_pack_size
;
160 static void prepare_pack_objects(struct child_process
*cmd
,
161 const struct pack_objects_args
*args
)
163 argv_array_push(&cmd
->args
, "pack-objects");
165 argv_array_pushf(&cmd
->args
, "--window=%s", args
->window
);
166 if (args
->window_memory
)
167 argv_array_pushf(&cmd
->args
, "--window-memory=%s", args
->window_memory
);
169 argv_array_pushf(&cmd
->args
, "--depth=%s", args
->depth
);
171 argv_array_pushf(&cmd
->args
, "--threads=%s", args
->threads
);
172 if (args
->max_pack_size
)
173 argv_array_pushf(&cmd
->args
, "--max-pack-size=%s", args
->max_pack_size
);
174 if (args
->no_reuse_delta
)
175 argv_array_pushf(&cmd
->args
, "--no-reuse-delta");
176 if (args
->no_reuse_object
)
177 argv_array_pushf(&cmd
->args
, "--no-reuse-object");
179 argv_array_push(&cmd
->args
, "--local");
181 argv_array_push(&cmd
->args
, "--quiet");
182 if (delta_base_offset
)
183 argv_array_push(&cmd
->args
, "--delta-base-offset");
184 argv_array_push(&cmd
->args
, packtmp
);
190 * Write oid to the given struct child_process's stdin, starting it first if
193 static int write_oid(const struct object_id
*oid
, struct packed_git
*pack
,
194 uint32_t pos
, void *data
)
196 struct child_process
*cmd
= data
;
199 if (start_command(cmd
))
200 die("Could not start pack-objects to repack promisor objects");
203 xwrite(cmd
->in
, oid_to_hex(oid
), GIT_SHA1_HEXSZ
);
204 xwrite(cmd
->in
, "\n", 1);
208 static void repack_promisor_objects(const struct pack_objects_args
*args
,
209 struct string_list
*names
)
211 struct child_process cmd
= CHILD_PROCESS_INIT
;
213 struct strbuf line
= STRBUF_INIT
;
215 prepare_pack_objects(&cmd
, args
);
219 * NEEDSWORK: Giving pack-objects only the OIDs without any ordering
220 * hints may result in suboptimal deltas in the resulting pack. See if
221 * the OIDs can be sent with fake paths such that pack-objects can use a
222 * {type -> existing pack order} ordering when computing deltas instead
223 * of a {type -> size} ordering, which may produce better deltas.
225 for_each_packed_object(write_oid
, &cmd
,
226 FOR_EACH_OBJECT_PROMISOR_ONLY
);
229 /* No packed objects; cmd was never started */
234 out
= xfdopen(cmd
.out
, "r");
235 while (strbuf_getline_lf(&line
, out
) != EOF
) {
238 if (line
.len
!= the_hash_algo
->hexsz
)
239 die("repack: Expecting full hex object ID lines only from pack-objects.");
240 string_list_append(names
, line
.buf
);
243 * pack-objects creates the .pack and .idx files, but not the
244 * .promisor file. Create the .promisor file, which is empty.
246 promisor_name
= mkpathdup("%s-%s.promisor", packtmp
,
248 fd
= open(promisor_name
, O_CREAT
|O_EXCL
|O_WRONLY
, 0600);
250 die_errno("unable to create '%s'", promisor_name
);
255 if (finish_command(&cmd
))
256 die("Could not finish pack-objects to repack promisor objects");
259 #define ALL_INTO_ONE 1
260 #define LOOSEN_UNREACHABLE 2
262 int cmd_repack(int argc
, const char **argv
, const char *prefix
)
273 struct child_process cmd
= CHILD_PROCESS_INIT
;
274 struct string_list_item
*item
;
275 struct string_list names
= STRING_LIST_INIT_DUP
;
276 struct string_list rollback
= STRING_LIST_INIT_NODUP
;
277 struct string_list existing_packs
= STRING_LIST_INIT_DUP
;
278 struct strbuf line
= STRBUF_INIT
;
279 int i
, ext
, ret
, failed
;
282 /* variables to be filled by option parsing */
283 int pack_everything
= 0;
284 int delete_redundant
= 0;
285 const char *unpack_unreachable
= NULL
;
286 int keep_unreachable
= 0;
287 struct string_list keep_pack_list
= STRING_LIST_INIT_NODUP
;
288 int no_update_server_info
= 0;
289 int midx_cleared
= 0;
290 struct pack_objects_args po_args
= {NULL
};
292 struct option builtin_repack_options
[] = {
293 OPT_BIT('a', NULL
, &pack_everything
,
294 N_("pack everything in a single pack"), ALL_INTO_ONE
),
295 OPT_BIT('A', NULL
, &pack_everything
,
296 N_("same as -a, and turn unreachable objects loose"),
297 LOOSEN_UNREACHABLE
| ALL_INTO_ONE
),
298 OPT_BOOL('d', NULL
, &delete_redundant
,
299 N_("remove redundant packs, and run git-prune-packed")),
300 OPT_BOOL('f', NULL
, &po_args
.no_reuse_delta
,
301 N_("pass --no-reuse-delta to git-pack-objects")),
302 OPT_BOOL('F', NULL
, &po_args
.no_reuse_object
,
303 N_("pass --no-reuse-object to git-pack-objects")),
304 OPT_BOOL('n', NULL
, &no_update_server_info
,
305 N_("do not run git-update-server-info")),
306 OPT__QUIET(&po_args
.quiet
, N_("be quiet")),
307 OPT_BOOL('l', "local", &po_args
.local
,
308 N_("pass --local to git-pack-objects")),
309 OPT_BOOL('b', "write-bitmap-index", &write_bitmaps
,
310 N_("write bitmap index")),
311 OPT_BOOL('i', "delta-islands", &use_delta_islands
,
312 N_("pass --delta-islands to git-pack-objects")),
313 OPT_STRING(0, "unpack-unreachable", &unpack_unreachable
, N_("approxidate"),
314 N_("with -A, do not loosen objects older than this")),
315 OPT_BOOL('k', "keep-unreachable", &keep_unreachable
,
316 N_("with -a, repack unreachable objects")),
317 OPT_STRING(0, "window", &po_args
.window
, N_("n"),
318 N_("size of the window used for delta compression")),
319 OPT_STRING(0, "window-memory", &po_args
.window_memory
, N_("bytes"),
320 N_("same as the above, but limit memory size instead of entries count")),
321 OPT_STRING(0, "depth", &po_args
.depth
, N_("n"),
322 N_("limits the maximum delta depth")),
323 OPT_STRING(0, "threads", &po_args
.threads
, N_("n"),
324 N_("limits the maximum number of threads")),
325 OPT_STRING(0, "max-pack-size", &po_args
.max_pack_size
, N_("bytes"),
326 N_("maximum size of each packfile")),
327 OPT_BOOL(0, "pack-kept-objects", &pack_kept_objects
,
328 N_("repack objects in packs marked with .keep")),
329 OPT_STRING_LIST(0, "keep-pack", &keep_pack_list
, N_("name"),
330 N_("do not repack this pack")),
334 git_config(repack_config
, NULL
);
336 argc
= parse_options(argc
, argv
, prefix
, builtin_repack_options
,
337 git_repack_usage
, 0);
339 if (delete_redundant
&& repository_format_precious_objects
)
340 die(_("cannot delete packs in a precious-objects repo"));
342 if (keep_unreachable
&&
343 (unpack_unreachable
|| (pack_everything
& LOOSEN_UNREACHABLE
)))
344 die(_("--keep-unreachable and -A are incompatible"));
346 if (pack_kept_objects
< 0)
347 pack_kept_objects
= write_bitmaps
;
349 if (write_bitmaps
&& !(pack_everything
& ALL_INTO_ONE
))
350 die(_(incremental_bitmap_conflict_error
));
352 packdir
= mkpathdup("%s/pack", get_object_directory());
353 packtmp
= mkpathdup("%s/.tmp-%d-pack", packdir
, (int)getpid());
355 sigchain_push_common(remove_pack_on_signal
);
357 prepare_pack_objects(&cmd
, &po_args
);
359 argv_array_push(&cmd
.args
, "--keep-true-parents");
360 if (!pack_kept_objects
)
361 argv_array_push(&cmd
.args
, "--honor-pack-keep");
362 for (i
= 0; i
< keep_pack_list
.nr
; i
++)
363 argv_array_pushf(&cmd
.args
, "--keep-pack=%s",
364 keep_pack_list
.items
[i
].string
);
365 argv_array_push(&cmd
.args
, "--non-empty");
366 argv_array_push(&cmd
.args
, "--all");
367 argv_array_push(&cmd
.args
, "--reflog");
368 argv_array_push(&cmd
.args
, "--indexed-objects");
369 if (repository_format_partial_clone
)
370 argv_array_push(&cmd
.args
, "--exclude-promisor-objects");
372 argv_array_push(&cmd
.args
, "--write-bitmap-index");
373 if (use_delta_islands
)
374 argv_array_push(&cmd
.args
, "--delta-islands");
376 if (pack_everything
& ALL_INTO_ONE
) {
377 get_non_kept_pack_filenames(&existing_packs
, &keep_pack_list
);
379 repack_promisor_objects(&po_args
, &names
);
381 if (existing_packs
.nr
&& delete_redundant
) {
382 if (unpack_unreachable
) {
383 argv_array_pushf(&cmd
.args
,
384 "--unpack-unreachable=%s",
386 argv_array_push(&cmd
.env_array
, "GIT_REF_PARANOIA=1");
387 } else if (pack_everything
& LOOSEN_UNREACHABLE
) {
388 argv_array_push(&cmd
.args
,
389 "--unpack-unreachable");
390 } else if (keep_unreachable
) {
391 argv_array_push(&cmd
.args
, "--keep-unreachable");
392 argv_array_push(&cmd
.args
, "--pack-loose-unreachable");
394 argv_array_push(&cmd
.env_array
, "GIT_REF_PARANOIA=1");
398 argv_array_push(&cmd
.args
, "--unpacked");
399 argv_array_push(&cmd
.args
, "--incremental");
404 ret
= start_command(&cmd
);
408 out
= xfdopen(cmd
.out
, "r");
409 while (strbuf_getline_lf(&line
, out
) != EOF
) {
410 if (line
.len
!= the_hash_algo
->hexsz
)
411 die("repack: Expecting full hex object ID lines only from pack-objects.");
412 string_list_append(&names
, line
.buf
);
415 ret
= finish_command(&cmd
);
419 if (!names
.nr
&& !po_args
.quiet
)
420 printf("Nothing new to pack.\n");
423 * Ok we have prepared all new packfiles.
424 * First see if there are packs of the same name and if so
425 * if we can move them out of the way (this can happen if we
426 * repacked immediately after packing fully.
429 for_each_string_list_item(item
, &names
) {
430 for (ext
= 0; ext
< ARRAY_SIZE(exts
); ext
++) {
431 char *fname
, *fname_old
;
434 clear_midx_file(the_repository
);
438 fname
= mkpathdup("%s/pack-%s%s", packdir
,
439 item
->string
, exts
[ext
].name
);
440 if (!file_exists(fname
)) {
445 fname_old
= mkpathdup("%s/old-%s%s", packdir
,
446 item
->string
, exts
[ext
].name
);
447 if (file_exists(fname_old
))
448 if (unlink(fname_old
))
451 if (!failed
&& rename(fname
, fname_old
)) {
457 string_list_append(&rollback
, fname
);
465 struct string_list rollback_failure
= STRING_LIST_INIT_DUP
;
466 for_each_string_list_item(item
, &rollback
) {
467 char *fname
, *fname_old
;
468 fname
= mkpathdup("%s/%s", packdir
, item
->string
);
469 fname_old
= mkpathdup("%s/old-%s", packdir
, item
->string
);
470 if (rename(fname_old
, fname
))
471 string_list_append(&rollback_failure
, fname
);
476 if (rollback_failure
.nr
) {
479 "WARNING: Some packs in use have been renamed by\n"
480 "WARNING: prefixing old- to their name, in order to\n"
481 "WARNING: replace them with the new version of the\n"
482 "WARNING: file. But the operation failed, and the\n"
483 "WARNING: attempt to rename them back to their\n"
484 "WARNING: original names also failed.\n"
485 "WARNING: Please rename them in %s manually:\n", packdir
);
486 for (i
= 0; i
< rollback_failure
.nr
; i
++)
487 fprintf(stderr
, "WARNING: old-%s -> %s\n",
488 rollback_failure
.items
[i
].string
,
489 rollback_failure
.items
[i
].string
);
494 /* Now the ones with the same name are out of the way... */
495 for_each_string_list_item(item
, &names
) {
496 for (ext
= 0; ext
< ARRAY_SIZE(exts
); ext
++) {
497 char *fname
, *fname_old
;
498 struct stat statbuffer
;
500 fname
= mkpathdup("%s/pack-%s%s",
501 packdir
, item
->string
, exts
[ext
].name
);
502 fname_old
= mkpathdup("%s-%s%s",
503 packtmp
, item
->string
, exts
[ext
].name
);
504 if (!stat(fname_old
, &statbuffer
)) {
505 statbuffer
.st_mode
&= ~(S_IWUSR
| S_IWGRP
| S_IWOTH
);
506 chmod(fname_old
, statbuffer
.st_mode
);
509 if (exists
|| !exts
[ext
].optional
) {
510 if (rename(fname_old
, fname
))
511 die_errno(_("renaming '%s' failed"), fname_old
);
518 /* Remove the "old-" files */
519 for_each_string_list_item(item
, &names
) {
520 for (ext
= 0; ext
< ARRAY_SIZE(exts
); ext
++) {
522 fname
= mkpathdup("%s/old-%s%s",
526 if (remove_path(fname
))
527 warning(_("failed to remove '%s'"), fname
);
532 /* End of pack replacement. */
534 reprepare_packed_git(the_repository
);
536 if (delete_redundant
) {
537 const int hexsz
= the_hash_algo
->hexsz
;
539 string_list_sort(&names
);
540 for_each_string_list_item(item
, &existing_packs
) {
542 size_t len
= strlen(item
->string
);
545 sha1
= item
->string
+ len
- hexsz
;
546 if (!string_list_has_string(&names
, sha1
))
547 remove_redundant_pack(packdir
, item
->string
);
549 if (!po_args
.quiet
&& isatty(2))
550 opts
|= PRUNE_PACKED_VERBOSE
;
551 prune_packed_objects(opts
);
553 if (!keep_unreachable
&&
554 (!(pack_everything
& LOOSEN_UNREACHABLE
) ||
555 unpack_unreachable
) &&
556 is_repository_shallow(the_repository
))
557 prune_shallow(PRUNE_QUICK
);
560 if (!no_update_server_info
)
561 update_server_info(0);
562 remove_temporary_files();
564 if (git_env_bool(GIT_TEST_MULTI_PACK_INDEX
, 0))
565 write_midx_file(get_object_directory());
567 string_list_clear(&names
, 0);
568 string_list_clear(&rollback
, 0);
569 string_list_clear(&existing_packs
, 0);
570 strbuf_release(&line
);