midx: close multi-pack-index on repack
[git/git.git] / builtin / repack.c
CommitLineData
a1bbc6c0
SB
1#include "builtin.h"
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"
525e18c0 11#include "midx.h"
5d19e813 12#include "packfile.h"
36f0f344 13#include "object-store.h"
a1bbc6c0
SB
14
15static int delta_base_offset = 1;
ee34a2be 16static int pack_kept_objects = -1;
2bed2d47 17static int write_bitmaps;
16d75fa4 18static int use_delta_islands;
a1bbc6c0
SB
19static char *packdir, *packtmp;
20
21static const char *const git_repack_usage[] = {
9c9b4f2f 22 N_("git repack [<options>]"),
a1bbc6c0
SB
23 NULL
24};
25
1c409a70
DT
26static 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."
29);
30
31
a1bbc6c0
SB
32static int repack_config(const char *var, const char *value, void *cb)
33{
34 if (!strcmp(var, "repack.usedeltabaseoffset")) {
35 delta_base_offset = git_config_bool(var, value);
36 return 0;
37 }
ee34a2be
JK
38 if (!strcmp(var, "repack.packkeptobjects")) {
39 pack_kept_objects = git_config_bool(var, value);
40 return 0;
41 }
71d76cb4
JK
42 if (!strcmp(var, "repack.writebitmaps") ||
43 !strcmp(var, "pack.writebitmaps")) {
d078d85b 44 write_bitmaps = git_config_bool(var, value);
3198b89f
JK
45 return 0;
46 }
16d75fa4
JK
47 if (!strcmp(var, "repack.usedeltaislands")) {
48 use_delta_islands = git_config_bool(var, value);
49 return 0;
50 }
a1bbc6c0
SB
51 return git_default_config(var, value, cb);
52}
53
54/*
55 * Remove temporary $GIT_OBJECT_DIRECTORY/pack/.tmp-$$-pack-* files.
56 */
57static void remove_temporary_files(void)
58{
59 struct strbuf buf = STRBUF_INIT;
60 size_t dirlen, prefixlen;
61 DIR *dir;
62 struct dirent *e;
63
64 dir = opendir(packdir);
65 if (!dir)
66 return;
67
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;
73
74 while ((e = readdir(dir))) {
75 if (strncmp(e->d_name, buf.buf + dirlen, prefixlen))
76 continue;
77 strbuf_setlen(&buf, dirlen);
78 strbuf_addstr(&buf, e->d_name);
79 unlink(buf.buf);
80 }
81 closedir(dir);
82 strbuf_release(&buf);
83}
84
85static void remove_pack_on_signal(int signo)
86{
87 remove_temporary_files();
88 sigchain_pop(signo);
89 raise(signo);
90}
91
92/*
93 * Adds all packs hex strings to the fname list, which do not
5d19e813 94 * have a corresponding .keep file. These packs are not to
0c16cd49 95 * be kept if we are going to pack everything into one file.
a1bbc6c0 96 */
ed7e5fc3
NTND
97static void get_non_kept_pack_filenames(struct string_list *fname_list,
98 const struct string_list *extra_keep)
a1bbc6c0
SB
99{
100 DIR *dir;
101 struct dirent *e;
102 char *fname;
a1bbc6c0
SB
103
104 if (!(dir = opendir(packdir)))
105 return;
106
107 while ((e = readdir(dir)) != NULL) {
26936bfd 108 size_t len;
ed7e5fc3
NTND
109 int i;
110
111 for (i = 0; i < extra_keep->nr; i++)
112 if (!fspathcmp(e->d_name, extra_keep->items[i].string))
113 break;
114 if (extra_keep->nr > 0 && i < extra_keep->nr)
115 continue;
116
26936bfd 117 if (!strip_suffix(e->d_name, ".pack", &len))
a1bbc6c0
SB
118 continue;
119
a1bbc6c0
SB
120 fname = xmemdupz(e->d_name, len);
121
5d19e813 122 if (!file_exists(mkpath("%s/%s.keep", packdir, fname)))
a1bbc6c0
SB
123 string_list_append_nodup(fname_list, fname);
124 else
125 free(fname);
126 }
127 closedir(dir);
128}
129
130static void remove_redundant_pack(const char *dir_name, const char *base_name)
131{
5d19e813 132 const char *exts[] = {".pack", ".idx", ".keep", ".bitmap", ".promisor"};
a1bbc6c0
SB
133 int i;
134 struct strbuf buf = STRBUF_INIT;
135 size_t plen;
136
137 strbuf_addf(&buf, "%s/%s", dir_name, base_name);
138 plen = buf.len;
139
140 for (i = 0; i < ARRAY_SIZE(exts); i++) {
141 strbuf_setlen(&buf, plen);
142 strbuf_addstr(&buf, exts[i]);
143 unlink(buf.buf);
144 }
145 strbuf_release(&buf);
146}
147
2b958e79
JT
148struct pack_objects_args {
149 const char *window;
150 const char *window_memory;
151 const char *depth;
152 const char *threads;
153 const char *max_pack_size;
154 int no_reuse_delta;
155 int no_reuse_object;
156 int quiet;
157 int local;
158};
159
160static void prepare_pack_objects(struct child_process *cmd,
161 const struct pack_objects_args *args)
162{
163 argv_array_push(&cmd->args, "pack-objects");
164 if (args->window)
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);
168 if (args->depth)
169 argv_array_pushf(&cmd->args, "--depth=%s", args->depth);
170 if (args->threads)
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");
178 if (args->local)
179 argv_array_push(&cmd->args, "--local");
180 if (args->quiet)
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);
185 cmd->git_cmd = 1;
186 cmd->out = -1;
187}
188
5d19e813
JT
189/*
190 * Write oid to the given struct child_process's stdin, starting it first if
191 * necessary.
192 */
193static int write_oid(const struct object_id *oid, struct packed_git *pack,
194 uint32_t pos, void *data)
195{
196 struct child_process *cmd = data;
197
198 if (cmd->in == -1) {
199 if (start_command(cmd))
200 die("Could not start pack-objects to repack promisor objects");
201 }
202
203 xwrite(cmd->in, oid_to_hex(oid), GIT_SHA1_HEXSZ);
204 xwrite(cmd->in, "\n", 1);
205 return 0;
206}
207
208static void repack_promisor_objects(const struct pack_objects_args *args,
209 struct string_list *names)
210{
211 struct child_process cmd = CHILD_PROCESS_INIT;
212 FILE *out;
213 struct strbuf line = STRBUF_INIT;
214
215 prepare_pack_objects(&cmd, args);
216 cmd.in = -1;
217
218 /*
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.
224 */
225 for_each_packed_object(write_oid, &cmd,
226 FOR_EACH_OBJECT_PROMISOR_ONLY);
227
228 if (cmd.in == -1)
229 /* No packed objects; cmd was never started */
230 return;
231
232 close(cmd.in);
233
234 out = xfdopen(cmd.out, "r");
235 while (strbuf_getline_lf(&line, out) != EOF) {
236 char *promisor_name;
237 int fd;
238 if (line.len != 40)
239 die("repack: Expecting 40 character sha1 lines only from pack-objects.");
240 string_list_append(names, line.buf);
241
242 /*
243 * pack-objects creates the .pack and .idx files, but not the
244 * .promisor file. Create the .promisor file, which is empty.
245 */
246 promisor_name = mkpathdup("%s-%s.promisor", packtmp,
247 line.buf);
248 fd = open(promisor_name, O_CREAT|O_EXCL|O_WRONLY, 0600);
249 if (fd < 0)
250 die_errno("unable to create '%s'", promisor_name);
251 close(fd);
252 free(promisor_name);
253 }
254 fclose(out);
255 if (finish_command(&cmd))
256 die("Could not finish pack-objects to repack promisor objects");
257}
258
a1bbc6c0
SB
259#define ALL_INTO_ONE 1
260#define LOOSEN_UNREACHABLE 2
261
262int cmd_repack(int argc, const char **argv, const char *prefix)
263{
42a02d85
JK
264 struct {
265 const char *name;
b77fcd1e 266 unsigned optional:1;
42a02d85
JK
267 } exts[] = {
268 {".pack"},
269 {".idx"},
5cf2741c 270 {".bitmap", 1},
5d19e813 271 {".promisor", 1},
42a02d85 272 };
d3180279 273 struct child_process cmd = CHILD_PROCESS_INIT;
a1bbc6c0 274 struct string_list_item *item;
a1bbc6c0
SB
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;
ed7e5fc3 279 int i, ext, ret, failed;
a1bbc6c0
SB
280 FILE *out;
281
282 /* variables to be filled by option parsing */
283 int pack_everything = 0;
284 int delete_redundant = 0;
aa8bd519 285 const char *unpack_unreachable = NULL;
905f27b8 286 int keep_unreachable = 0;
ed7e5fc3 287 struct string_list keep_pack_list = STRING_LIST_INIT_NODUP;
a1bbc6c0 288 int no_update_server_info = 0;
525e18c0 289 int midx_cleared = 0;
2b958e79 290 struct pack_objects_args po_args = {NULL};
a1bbc6c0
SB
291
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")),
2b958e79 300 OPT_BOOL('f', NULL, &po_args.no_reuse_delta,
a1bbc6c0 301 N_("pass --no-reuse-delta to git-pack-objects")),
2b958e79 302 OPT_BOOL('F', NULL, &po_args.no_reuse_object,
a1bbc6c0
SB
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")),
2b958e79
JT
306 OPT__QUIET(&po_args.quiet, N_("be quiet")),
307 OPT_BOOL('l', "local", &po_args.local,
a1bbc6c0 308 N_("pass --local to git-pack-objects")),
d078d85b 309 OPT_BOOL('b', "write-bitmap-index", &write_bitmaps,
5cf2741c 310 N_("write bitmap index")),
16d75fa4
JK
311 OPT_BOOL('i', "delta-islands", &use_delta_islands,
312 N_("pass --delta-islands to git-pack-objects")),
a1bbc6c0
SB
313 OPT_STRING(0, "unpack-unreachable", &unpack_unreachable, N_("approxidate"),
314 N_("with -A, do not loosen objects older than this")),
905f27b8
JK
315 OPT_BOOL('k', "keep-unreachable", &keep_unreachable,
316 N_("with -a, repack unreachable objects")),
2b958e79 317 OPT_STRING(0, "window", &po_args.window, N_("n"),
a1bbc6c0 318 N_("size of the window used for delta compression")),
2b958e79 319 OPT_STRING(0, "window-memory", &po_args.window_memory, N_("bytes"),
a1bbc6c0 320 N_("same as the above, but limit memory size instead of entries count")),
2b958e79 321 OPT_STRING(0, "depth", &po_args.depth, N_("n"),
a1bbc6c0 322 N_("limits the maximum delta depth")),
2b958e79 323 OPT_STRING(0, "threads", &po_args.threads, N_("n"),
40bcf318 324 N_("limits the maximum number of threads")),
2b958e79 325 OPT_STRING(0, "max-pack-size", &po_args.max_pack_size, N_("bytes"),
a1bbc6c0 326 N_("maximum size of each packfile")),
ee34a2be
JK
327 OPT_BOOL(0, "pack-kept-objects", &pack_kept_objects,
328 N_("repack objects in packs marked with .keep")),
ed7e5fc3
NTND
329 OPT_STRING_LIST(0, "keep-pack", &keep_pack_list, N_("name"),
330 N_("do not repack this pack")),
a1bbc6c0
SB
331 OPT_END()
332 };
333
334 git_config(repack_config, NULL);
335
336 argc = parse_options(argc, argv, prefix, builtin_repack_options,
337 git_repack_usage, 0);
338
067fbd41
JK
339 if (delete_redundant && repository_format_precious_objects)
340 die(_("cannot delete packs in a precious-objects repo"));
341
905f27b8
JK
342 if (keep_unreachable &&
343 (unpack_unreachable || (pack_everything & LOOSEN_UNREACHABLE)))
344 die(_("--keep-unreachable and -A are incompatible"));
345
ee34a2be 346 if (pack_kept_objects < 0)
2bed2d47 347 pack_kept_objects = write_bitmaps;
ee34a2be 348
1c409a70
DT
349 if (write_bitmaps && !(pack_everything & ALL_INTO_ONE))
350 die(_(incremental_bitmap_conflict_error));
351
a1bbc6c0
SB
352 packdir = mkpathdup("%s/pack", get_object_directory());
353 packtmp = mkpathdup("%s/.tmp-%d-pack", packdir, (int)getpid());
354
355 sigchain_push_common(remove_pack_on_signal);
356
2b958e79
JT
357 prepare_pack_objects(&cmd, &po_args);
358
a2bae2dc 359 argv_array_push(&cmd.args, "--keep-true-parents");
ee34a2be 360 if (!pack_kept_objects)
a2bae2dc 361 argv_array_push(&cmd.args, "--honor-pack-keep");
ed7e5fc3
NTND
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);
a2bae2dc
RS
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");
0c16cd49
JT
369 if (repository_format_partial_clone)
370 argv_array_push(&cmd.args, "--exclude-promisor-objects");
2bed2d47 371 if (write_bitmaps)
a2bae2dc 372 argv_array_push(&cmd.args, "--write-bitmap-index");
16d75fa4
JK
373 if (use_delta_islands)
374 argv_array_push(&cmd.args, "--delta-islands");
a1bbc6c0
SB
375
376 if (pack_everything & ALL_INTO_ONE) {
ed7e5fc3 377 get_non_kept_pack_filenames(&existing_packs, &keep_pack_list);
a1bbc6c0 378
5d19e813
JT
379 repack_promisor_objects(&po_args, &names);
380
a1bbc6c0 381 if (existing_packs.nr && delete_redundant) {
8d422993 382 if (unpack_unreachable) {
a2bae2dc 383 argv_array_pushf(&cmd.args,
a1bbc6c0
SB
384 "--unpack-unreachable=%s",
385 unpack_unreachable);
8d422993
JK
386 argv_array_push(&cmd.env_array, "GIT_REF_PARANOIA=1");
387 } else if (pack_everything & LOOSEN_UNREACHABLE) {
a2bae2dc 388 argv_array_push(&cmd.args,
a1bbc6c0 389 "--unpack-unreachable");
905f27b8
JK
390 } else if (keep_unreachable) {
391 argv_array_push(&cmd.args, "--keep-unreachable");
e26a8c47 392 argv_array_push(&cmd.args, "--pack-loose-unreachable");
8d422993
JK
393 } else {
394 argv_array_push(&cmd.env_array, "GIT_REF_PARANOIA=1");
395 }
a1bbc6c0
SB
396 }
397 } else {
a2bae2dc
RS
398 argv_array_push(&cmd.args, "--unpacked");
399 argv_array_push(&cmd.args, "--incremental");
a1bbc6c0
SB
400 }
401
a1bbc6c0
SB
402 cmd.no_stdin = 1;
403
404 ret = start_command(&cmd);
405 if (ret)
ffc9329f 406 return ret;
a1bbc6c0 407
a1bbc6c0 408 out = xfdopen(cmd.out, "r");
8f309aeb 409 while (strbuf_getline_lf(&line, out) != EOF) {
a1bbc6c0
SB
410 if (line.len != 40)
411 die("repack: Expecting 40 character sha1 lines only from pack-objects.");
412 string_list_append(&names, line.buf);
a1bbc6c0
SB
413 }
414 fclose(out);
415 ret = finish_command(&cmd);
416 if (ret)
ffc9329f 417 return ret;
a1bbc6c0 418
2b958e79 419 if (!names.nr && !po_args.quiet)
a1bbc6c0
SB
420 printf("Nothing new to pack.\n");
421
422 /*
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.
427 */
428 failed = 0;
429 for_each_string_list_item(item, &names) {
b328c216 430 for (ext = 0; ext < ARRAY_SIZE(exts); ext++) {
e3cf2303 431 char *fname, *fname_old;
525e18c0
DS
432
433 if (!midx_cleared) {
1dcd9f20 434 clear_midx_file(the_repository);
525e18c0
DS
435 midx_cleared = 1;
436 }
437
9d7fbfd2 438 fname = mkpathdup("%s/pack-%s%s", packdir,
42a02d85 439 item->string, exts[ext].name);
a1bbc6c0
SB
440 if (!file_exists(fname)) {
441 free(fname);
442 continue;
443 }
444
e3cf2303 445 fname_old = mkpathdup("%s/old-%s%s", packdir,
42a02d85 446 item->string, exts[ext].name);
a1bbc6c0
SB
447 if (file_exists(fname_old))
448 if (unlink(fname_old))
449 failed = 1;
450
451 if (!failed && rename(fname, fname_old)) {
452 free(fname);
e3cf2303 453 free(fname_old);
a1bbc6c0
SB
454 failed = 1;
455 break;
456 } else {
457 string_list_append(&rollback, fname);
e3cf2303 458 free(fname_old);
a1bbc6c0
SB
459 }
460 }
461 if (failed)
462 break;
463 }
464 if (failed) {
465 struct string_list rollback_failure = STRING_LIST_INIT_DUP;
466 for_each_string_list_item(item, &rollback) {
e3cf2303 467 char *fname, *fname_old;
a1bbc6c0 468 fname = mkpathdup("%s/%s", packdir, item->string);
e3cf2303 469 fname_old = mkpathdup("%s/old-%s", packdir, item->string);
a1bbc6c0
SB
470 if (rename(fname_old, fname))
471 string_list_append(&rollback_failure, fname);
472 free(fname);
e3cf2303 473 free(fname_old);
a1bbc6c0
SB
474 }
475
476 if (rollback_failure.nr) {
477 int i;
478 fprintf(stderr,
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);
490 }
491 exit(1);
492 }
493
494 /* Now the ones with the same name are out of the way... */
495 for_each_string_list_item(item, &names) {
b328c216 496 for (ext = 0; ext < ARRAY_SIZE(exts); ext++) {
a1bbc6c0
SB
497 char *fname, *fname_old;
498 struct stat statbuffer;
b77fcd1e 499 int exists = 0;
a1bbc6c0 500 fname = mkpathdup("%s/pack-%s%s",
42a02d85 501 packdir, item->string, exts[ext].name);
a1bbc6c0 502 fname_old = mkpathdup("%s-%s%s",
42a02d85 503 packtmp, item->string, exts[ext].name);
a1bbc6c0
SB
504 if (!stat(fname_old, &statbuffer)) {
505 statbuffer.st_mode &= ~(S_IWUSR | S_IWGRP | S_IWOTH);
506 chmod(fname_old, statbuffer.st_mode);
b77fcd1e
JK
507 exists = 1;
508 }
509 if (exists || !exts[ext].optional) {
510 if (rename(fname_old, fname))
511 die_errno(_("renaming '%s' failed"), fname_old);
a1bbc6c0 512 }
a1bbc6c0
SB
513 free(fname);
514 free(fname_old);
515 }
516 }
517
518 /* Remove the "old-" files */
519 for_each_string_list_item(item, &names) {
b328c216 520 for (ext = 0; ext < ARRAY_SIZE(exts); ext++) {
e3cf2303
JK
521 char *fname;
522 fname = mkpathdup("%s/old-%s%s",
523 packdir,
524 item->string,
525 exts[ext].name);
0b63c6a5 526 if (remove_path(fname))
e923a8ab 527 warning(_("failed to remove '%s'"), fname);
e3cf2303 528 free(fname);
a1bbc6c0
SB
529 }
530 }
531
532 /* End of pack replacement. */
533
5d19e813
JT
534 reprepare_packed_git(the_repository);
535
a1bbc6c0 536 if (delete_redundant) {
4489a480 537 int opts = 0;
3383e199 538 string_list_sort(&names);
a1bbc6c0
SB
539 for_each_string_list_item(item, &existing_packs) {
540 char *sha1;
541 size_t len = strlen(item->string);
542 if (len < 40)
543 continue;
544 sha1 = item->string + len - 40;
545 if (!string_list_has_string(&names, sha1))
546 remove_redundant_pack(packdir, item->string);
547 }
2b958e79 548 if (!po_args.quiet && isatty(2))
4489a480
RS
549 opts |= PRUNE_PACKED_VERBOSE;
550 prune_packed_objects(opts);
a1bbc6c0
SB
551 }
552
4489a480
RS
553 if (!no_update_server_info)
554 update_server_info(0);
a1bbc6c0
SB
555 remove_temporary_files();
556 string_list_clear(&names, 0);
557 string_list_clear(&rollback, 0);
558 string_list_clear(&existing_packs, 0);
559 strbuf_release(&line);
560
561 return 0;
562}