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
= -1;
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();
92 static int has_pack_keep_file(void)
96 for (p
= get_all_packs(the_repository
); p
; p
= p
->next
) {
104 * Adds all packs hex strings to the fname list, which do not
105 * have a corresponding .keep file. These packs are not to
106 * be kept if we are going to pack everything into one file.
108 static void get_non_kept_pack_filenames(struct string_list
*fname_list
,
109 const struct string_list
*extra_keep
)
115 if (!(dir
= opendir(packdir
)))
118 while ((e
= readdir(dir
)) != NULL
) {
122 for (i
= 0; i
< extra_keep
->nr
; i
++)
123 if (!fspathcmp(e
->d_name
, extra_keep
->items
[i
].string
))
125 if (extra_keep
->nr
> 0 && i
< extra_keep
->nr
)
128 if (!strip_suffix(e
->d_name
, ".pack", &len
))
131 fname
= xmemdupz(e
->d_name
, len
);
133 if (!file_exists(mkpath("%s/%s.keep", packdir
, fname
)))
134 string_list_append_nodup(fname_list
, fname
);
141 static void remove_redundant_pack(const char *dir_name
, const char *base_name
)
143 struct strbuf buf
= STRBUF_INIT
;
144 strbuf_addf(&buf
, "%s/%s.pack", dir_name
, base_name
);
145 unlink_pack_path(buf
.buf
, 1);
146 strbuf_release(&buf
);
149 struct pack_objects_args
{
151 const char *window_memory
;
154 const char *max_pack_size
;
161 static void prepare_pack_objects(struct child_process
*cmd
,
162 const struct pack_objects_args
*args
)
164 argv_array_push(&cmd
->args
, "pack-objects");
166 argv_array_pushf(&cmd
->args
, "--window=%s", args
->window
);
167 if (args
->window_memory
)
168 argv_array_pushf(&cmd
->args
, "--window-memory=%s", args
->window_memory
);
170 argv_array_pushf(&cmd
->args
, "--depth=%s", args
->depth
);
172 argv_array_pushf(&cmd
->args
, "--threads=%s", args
->threads
);
173 if (args
->max_pack_size
)
174 argv_array_pushf(&cmd
->args
, "--max-pack-size=%s", args
->max_pack_size
);
175 if (args
->no_reuse_delta
)
176 argv_array_pushf(&cmd
->args
, "--no-reuse-delta");
177 if (args
->no_reuse_object
)
178 argv_array_pushf(&cmd
->args
, "--no-reuse-object");
180 argv_array_push(&cmd
->args
, "--local");
182 argv_array_push(&cmd
->args
, "--quiet");
183 if (delta_base_offset
)
184 argv_array_push(&cmd
->args
, "--delta-base-offset");
185 argv_array_push(&cmd
->args
, packtmp
);
191 * Write oid to the given struct child_process's stdin, starting it first if
194 static int write_oid(const struct object_id
*oid
, struct packed_git
*pack
,
195 uint32_t pos
, void *data
)
197 struct child_process
*cmd
= data
;
200 if (start_command(cmd
))
201 die(_("could not start pack-objects to repack promisor objects"));
204 xwrite(cmd
->in
, oid_to_hex(oid
), GIT_SHA1_HEXSZ
);
205 xwrite(cmd
->in
, "\n", 1);
209 static void repack_promisor_objects(const struct pack_objects_args
*args
,
210 struct string_list
*names
)
212 struct child_process cmd
= CHILD_PROCESS_INIT
;
214 struct strbuf line
= STRBUF_INIT
;
216 prepare_pack_objects(&cmd
, args
);
220 * NEEDSWORK: Giving pack-objects only the OIDs without any ordering
221 * hints may result in suboptimal deltas in the resulting pack. See if
222 * the OIDs can be sent with fake paths such that pack-objects can use a
223 * {type -> existing pack order} ordering when computing deltas instead
224 * of a {type -> size} ordering, which may produce better deltas.
226 for_each_packed_object(write_oid
, &cmd
,
227 FOR_EACH_OBJECT_PROMISOR_ONLY
);
230 /* No packed objects; cmd was never started */
235 out
= xfdopen(cmd
.out
, "r");
236 while (strbuf_getline_lf(&line
, out
) != EOF
) {
239 if (line
.len
!= the_hash_algo
->hexsz
)
240 die(_("repack: Expecting full hex object ID lines only from pack-objects."));
241 string_list_append(names
, line
.buf
);
244 * pack-objects creates the .pack and .idx files, but not the
245 * .promisor file. Create the .promisor file, which is empty.
247 promisor_name
= mkpathdup("%s-%s.promisor", packtmp
,
249 fd
= open(promisor_name
, O_CREAT
|O_EXCL
|O_WRONLY
, 0600);
251 die_errno(_("unable to create '%s'"), promisor_name
);
256 if (finish_command(&cmd
))
257 die(_("could not finish pack-objects to repack promisor objects"));
260 #define ALL_INTO_ONE 1
261 #define LOOSEN_UNREACHABLE 2
263 int cmd_repack(int argc
, const char **argv
, const char *prefix
)
274 struct child_process cmd
= CHILD_PROCESS_INIT
;
275 struct string_list_item
*item
;
276 struct string_list names
= STRING_LIST_INIT_DUP
;
277 struct string_list rollback
= STRING_LIST_INIT_NODUP
;
278 struct string_list existing_packs
= STRING_LIST_INIT_DUP
;
279 struct strbuf line
= STRBUF_INIT
;
280 int i
, ext
, ret
, failed
;
283 /* variables to be filled by option parsing */
284 int pack_everything
= 0;
285 int delete_redundant
= 0;
286 const char *unpack_unreachable
= NULL
;
287 int keep_unreachable
= 0;
288 struct string_list keep_pack_list
= STRING_LIST_INIT_NODUP
;
289 int no_update_server_info
= 0;
290 int midx_cleared
= 0;
291 struct pack_objects_args po_args
= {NULL
};
293 struct option builtin_repack_options
[] = {
294 OPT_BIT('a', NULL
, &pack_everything
,
295 N_("pack everything in a single pack"), ALL_INTO_ONE
),
296 OPT_BIT('A', NULL
, &pack_everything
,
297 N_("same as -a, and turn unreachable objects loose"),
298 LOOSEN_UNREACHABLE
| ALL_INTO_ONE
),
299 OPT_BOOL('d', NULL
, &delete_redundant
,
300 N_("remove redundant packs, and run git-prune-packed")),
301 OPT_BOOL('f', NULL
, &po_args
.no_reuse_delta
,
302 N_("pass --no-reuse-delta to git-pack-objects")),
303 OPT_BOOL('F', NULL
, &po_args
.no_reuse_object
,
304 N_("pass --no-reuse-object to git-pack-objects")),
305 OPT_BOOL('n', NULL
, &no_update_server_info
,
306 N_("do not run git-update-server-info")),
307 OPT__QUIET(&po_args
.quiet
, N_("be quiet")),
308 OPT_BOOL('l', "local", &po_args
.local
,
309 N_("pass --local to git-pack-objects")),
310 OPT_BOOL('b', "write-bitmap-index", &write_bitmaps
,
311 N_("write bitmap index")),
312 OPT_BOOL('i', "delta-islands", &use_delta_islands
,
313 N_("pass --delta-islands to git-pack-objects")),
314 OPT_STRING(0, "unpack-unreachable", &unpack_unreachable
, N_("approxidate"),
315 N_("with -A, do not loosen objects older than this")),
316 OPT_BOOL('k', "keep-unreachable", &keep_unreachable
,
317 N_("with -a, repack unreachable objects")),
318 OPT_STRING(0, "window", &po_args
.window
, N_("n"),
319 N_("size of the window used for delta compression")),
320 OPT_STRING(0, "window-memory", &po_args
.window_memory
, N_("bytes"),
321 N_("same as the above, but limit memory size instead of entries count")),
322 OPT_STRING(0, "depth", &po_args
.depth
, N_("n"),
323 N_("limits the maximum delta depth")),
324 OPT_STRING(0, "threads", &po_args
.threads
, N_("n"),
325 N_("limits the maximum number of threads")),
326 OPT_STRING(0, "max-pack-size", &po_args
.max_pack_size
, N_("bytes"),
327 N_("maximum size of each packfile")),
328 OPT_BOOL(0, "pack-kept-objects", &pack_kept_objects
,
329 N_("repack objects in packs marked with .keep")),
330 OPT_STRING_LIST(0, "keep-pack", &keep_pack_list
, N_("name"),
331 N_("do not repack this pack")),
335 git_config(repack_config
, NULL
);
337 argc
= parse_options(argc
, argv
, prefix
, builtin_repack_options
,
338 git_repack_usage
, 0);
340 if (delete_redundant
&& repository_format_precious_objects
)
341 die(_("cannot delete packs in a precious-objects repo"));
343 if (keep_unreachable
&&
344 (unpack_unreachable
|| (pack_everything
& LOOSEN_UNREACHABLE
)))
345 die(_("--keep-unreachable and -A are incompatible"));
347 if (write_bitmaps
< 0) {
348 if (!(pack_everything
& ALL_INTO_ONE
) ||
349 !is_bare_repository() ||
350 keep_pack_list
.nr
!= 0 ||
351 has_pack_keep_file())
354 if (pack_kept_objects
< 0)
355 pack_kept_objects
= !!write_bitmaps
;
357 if (write_bitmaps
&& !(pack_everything
& ALL_INTO_ONE
))
358 die(_(incremental_bitmap_conflict_error
));
360 packdir
= mkpathdup("%s/pack", get_object_directory());
361 packtmp
= mkpathdup("%s/.tmp-%d-pack", packdir
, (int)getpid());
363 sigchain_push_common(remove_pack_on_signal
);
365 prepare_pack_objects(&cmd
, &po_args
);
367 argv_array_push(&cmd
.args
, "--keep-true-parents");
368 if (!pack_kept_objects
)
369 argv_array_push(&cmd
.args
, "--honor-pack-keep");
370 for (i
= 0; i
< keep_pack_list
.nr
; i
++)
371 argv_array_pushf(&cmd
.args
, "--keep-pack=%s",
372 keep_pack_list
.items
[i
].string
);
373 argv_array_push(&cmd
.args
, "--non-empty");
374 argv_array_push(&cmd
.args
, "--all");
375 argv_array_push(&cmd
.args
, "--reflog");
376 argv_array_push(&cmd
.args
, "--indexed-objects");
377 if (repository_format_partial_clone
)
378 argv_array_push(&cmd
.args
, "--exclude-promisor-objects");
379 if (write_bitmaps
> 0)
380 argv_array_push(&cmd
.args
, "--write-bitmap-index");
381 else if (write_bitmaps
< 0)
382 argv_array_push(&cmd
.args
, "--write-bitmap-index-quiet");
383 if (use_delta_islands
)
384 argv_array_push(&cmd
.args
, "--delta-islands");
386 if (pack_everything
& ALL_INTO_ONE
) {
387 get_non_kept_pack_filenames(&existing_packs
, &keep_pack_list
);
389 repack_promisor_objects(&po_args
, &names
);
391 if (existing_packs
.nr
&& delete_redundant
) {
392 if (unpack_unreachable
) {
393 argv_array_pushf(&cmd
.args
,
394 "--unpack-unreachable=%s",
396 argv_array_push(&cmd
.env_array
, "GIT_REF_PARANOIA=1");
397 } else if (pack_everything
& LOOSEN_UNREACHABLE
) {
398 argv_array_push(&cmd
.args
,
399 "--unpack-unreachable");
400 } else if (keep_unreachable
) {
401 argv_array_push(&cmd
.args
, "--keep-unreachable");
402 argv_array_push(&cmd
.args
, "--pack-loose-unreachable");
404 argv_array_push(&cmd
.env_array
, "GIT_REF_PARANOIA=1");
408 argv_array_push(&cmd
.args
, "--unpacked");
409 argv_array_push(&cmd
.args
, "--incremental");
414 ret
= start_command(&cmd
);
418 out
= xfdopen(cmd
.out
, "r");
419 while (strbuf_getline_lf(&line
, out
) != EOF
) {
420 if (line
.len
!= the_hash_algo
->hexsz
)
421 die(_("repack: Expecting full hex object ID lines only from pack-objects."));
422 string_list_append(&names
, line
.buf
);
425 ret
= finish_command(&cmd
);
429 if (!names
.nr
&& !po_args
.quiet
)
430 printf_ln(_("Nothing new to pack."));
432 close_object_store(the_repository
->objects
);
435 * Ok we have prepared all new packfiles.
436 * First see if there are packs of the same name and if so
437 * if we can move them out of the way (this can happen if we
438 * repacked immediately after packing fully.
441 for_each_string_list_item(item
, &names
) {
442 for (ext
= 0; ext
< ARRAY_SIZE(exts
); ext
++) {
443 char *fname
, *fname_old
;
446 clear_midx_file(the_repository
);
450 fname
= mkpathdup("%s/pack-%s%s", packdir
,
451 item
->string
, exts
[ext
].name
);
452 if (!file_exists(fname
)) {
457 fname_old
= mkpathdup("%s/old-%s%s", packdir
,
458 item
->string
, exts
[ext
].name
);
459 if (file_exists(fname_old
))
460 if (unlink(fname_old
))
463 if (!failed
&& rename(fname
, fname_old
)) {
469 string_list_append(&rollback
, fname
);
477 struct string_list rollback_failure
= STRING_LIST_INIT_DUP
;
478 for_each_string_list_item(item
, &rollback
) {
479 char *fname
, *fname_old
;
480 fname
= mkpathdup("%s/%s", packdir
, item
->string
);
481 fname_old
= mkpathdup("%s/old-%s", packdir
, item
->string
);
482 if (rename(fname_old
, fname
))
483 string_list_append(&rollback_failure
, fname
);
488 if (rollback_failure
.nr
) {
491 _("WARNING: Some packs in use have been renamed by\n"
492 "WARNING: prefixing old- to their name, in order to\n"
493 "WARNING: replace them with the new version of the\n"
494 "WARNING: file. But the operation failed, and the\n"
495 "WARNING: attempt to rename them back to their\n"
496 "WARNING: original names also failed.\n"
497 "WARNING: Please rename them in %s manually:\n"), packdir
);
498 for (i
= 0; i
< rollback_failure
.nr
; i
++)
499 fprintf(stderr
, "WARNING: old-%s -> %s\n",
500 rollback_failure
.items
[i
].string
,
501 rollback_failure
.items
[i
].string
);
506 /* Now the ones with the same name are out of the way... */
507 for_each_string_list_item(item
, &names
) {
508 for (ext
= 0; ext
< ARRAY_SIZE(exts
); ext
++) {
509 char *fname
, *fname_old
;
510 struct stat statbuffer
;
512 fname
= mkpathdup("%s/pack-%s%s",
513 packdir
, item
->string
, exts
[ext
].name
);
514 fname_old
= mkpathdup("%s-%s%s",
515 packtmp
, item
->string
, exts
[ext
].name
);
516 if (!stat(fname_old
, &statbuffer
)) {
517 statbuffer
.st_mode
&= ~(S_IWUSR
| S_IWGRP
| S_IWOTH
);
518 chmod(fname_old
, statbuffer
.st_mode
);
521 if (exists
|| !exts
[ext
].optional
) {
522 if (rename(fname_old
, fname
))
523 die_errno(_("renaming '%s' failed"), fname_old
);
530 /* Remove the "old-" files */
531 for_each_string_list_item(item
, &names
) {
532 for (ext
= 0; ext
< ARRAY_SIZE(exts
); ext
++) {
534 fname
= mkpathdup("%s/old-%s%s",
538 if (remove_path(fname
))
539 warning(_("failed to remove '%s'"), fname
);
544 /* End of pack replacement. */
546 reprepare_packed_git(the_repository
);
548 if (delete_redundant
) {
549 const int hexsz
= the_hash_algo
->hexsz
;
551 string_list_sort(&names
);
552 for_each_string_list_item(item
, &existing_packs
) {
554 size_t len
= strlen(item
->string
);
557 sha1
= item
->string
+ len
- hexsz
;
558 if (!string_list_has_string(&names
, sha1
))
559 remove_redundant_pack(packdir
, item
->string
);
561 if (!po_args
.quiet
&& isatty(2))
562 opts
|= PRUNE_PACKED_VERBOSE
;
563 prune_packed_objects(opts
);
565 if (!keep_unreachable
&&
566 (!(pack_everything
& LOOSEN_UNREACHABLE
) ||
567 unpack_unreachable
) &&
568 is_repository_shallow(the_repository
))
569 prune_shallow(PRUNE_QUICK
);
572 if (!no_update_server_info
)
573 update_server_info(0);
574 remove_temporary_files();
576 if (git_env_bool(GIT_TEST_MULTI_PACK_INDEX
, 0))
577 write_midx_file(get_object_directory());
579 string_list_clear(&names
, 0);
580 string_list_clear(&rollback
, 0);
581 string_list_clear(&existing_packs
, 0);
582 strbuf_release(&line
);