1/*
2 * GIT - The information manager from hell
3 *
4 * Copyright (C) Linus Torvalds, 2005
5 */
6#include "cache.h"
7#include "config.h"
8#include "lockfile.h"
9#include "quote.h"
10#include "cache-tree.h"
11#include "tree-walk.h"
12#include "builtin.h"
13#include "refs.h"
14#include "resolve-undo.h"
15#include "parse-options.h"
16#include "pathspec.h"
17#include "dir.h"
18#include "split-index.h"
19#include "fsmonitor.h"
20
21/*
22 * Default to not allowing changes to the list of files. The
23 * tool doesn't actually care, but this makes it harder to add
24 * files to the revision control by mistake by doing something
25 * like "git update-index *" and suddenly having all the object
26 * files be revision controlled.
27 */
28static int allow_add;
29static int allow_remove;
30static int allow_replace;
31static int info_only;
32static int force_remove;
33static int verbose;
34static int mark_valid_only;
35static int mark_skip_worktree_only;
36static int mark_fsmonitor_only;
37#define MARK_FLAG 1
38#define UNMARK_FLAG 2
39static struct strbuf mtime_dir = STRBUF_INIT;
40
41/* Untracked cache mode */
42enum uc_mode {
43 UC_UNSPECIFIED = -1,
44 UC_DISABLE = 0,
45 UC_ENABLE,
46 UC_TEST,
47 UC_FORCE
48};
49
50__attribute__((format (printf, 1, 2)))
51static void report(const char *fmt, ...)
52{
53 va_list vp;
54
55 if (!verbose)
56 return;
57
58 va_start(vp, fmt);
59 vprintf(fmt, vp);
60 putchar('\n');
61 va_end(vp);
62}
63
64static void remove_test_directory(void)
65{
66 if (mtime_dir.len)
67 remove_dir_recursively(&mtime_dir, 0);
68}
69
70static const char *get_mtime_path(const char *path)
71{
72 static struct strbuf sb = STRBUF_INIT;
73 strbuf_reset(&sb);
74 strbuf_addf(&sb, "%s/%s", mtime_dir.buf, path);
75 return sb.buf;
76}
77
78static void xmkdir(const char *path)
79{
80 path = get_mtime_path(path);
81 if (mkdir(path, 0700))
82 die_errno(_("failed to create directory %s"), path);
83}
84
85static int xstat_mtime_dir(struct stat *st)
86{
87 if (stat(mtime_dir.buf, st))
88 die_errno(_("failed to stat %s"), mtime_dir.buf);
89 return 0;
90}
91
92static int create_file(const char *path)
93{
94 int fd;
95 path = get_mtime_path(path);
96 fd = open(path, O_CREAT | O_RDWR, 0644);
97 if (fd < 0)
98 die_errno(_("failed to create file %s"), path);
99 return fd;
100}
101
102static void xunlink(const char *path)
103{
104 path = get_mtime_path(path);
105 if (unlink(path))
106 die_errno(_("failed to delete file %s"), path);
107}
108
109static void xrmdir(const char *path)
110{
111 path = get_mtime_path(path);
112 if (rmdir(path))
113 die_errno(_("failed to delete directory %s"), path);
114}
115
116static void avoid_racy(void)
117{
118 /*
119 * not use if we could usleep(10) if USE_NSEC is defined. The
120 * field nsec could be there, but the OS could choose to
121 * ignore it?
122 */
123 sleep(1);
124}
125
126static int test_if_untracked_cache_is_supported(void)
127{
128 struct stat st;
129 struct stat_data base;
130 int fd, ret = 0;
131 char *cwd;
132
133 strbuf_addstr(&mtime_dir, "mtime-test-XXXXXX");
134 if (!mkdtemp(mtime_dir.buf))
135 die_errno("Could not make temporary directory");
136
137 cwd = xgetcwd();
138 fprintf(stderr, _("Testing mtime in '%s' "), cwd);
139 free(cwd);
140
141 atexit(remove_test_directory);
142 xstat_mtime_dir(&st);
143 fill_stat_data(&base, &st);
144 fputc('.', stderr);
145
146 avoid_racy();
147 fd = create_file("newfile");
148 xstat_mtime_dir(&st);
149 if (!match_stat_data(&base, &st)) {
150 close(fd);
151 fputc('\n', stderr);
152 fprintf_ln(stderr,_("directory stat info does not "
153 "change after adding a new file"));
154 goto done;
155 }
156 fill_stat_data(&base, &st);
157 fputc('.', stderr);
158
159 avoid_racy();
160 xmkdir("new-dir");
161 xstat_mtime_dir(&st);
162 if (!match_stat_data(&base, &st)) {
163 close(fd);
164 fputc('\n', stderr);
165 fprintf_ln(stderr, _("directory stat info does not change "
166 "after adding a new directory"));
167 goto done;
168 }
169 fill_stat_data(&base, &st);
170 fputc('.', stderr);
171
172 avoid_racy();
173 write_or_die(fd, "data", 4);
174 close(fd);
175 xstat_mtime_dir(&st);
176 if (match_stat_data(&base, &st)) {
177 fputc('\n', stderr);
178 fprintf_ln(stderr, _("directory stat info changes "
179 "after updating a file"));
180 goto done;
181 }
182 fputc('.', stderr);
183
184 avoid_racy();
185 close(create_file("new-dir/new"));
186 xstat_mtime_dir(&st);
187 if (match_stat_data(&base, &st)) {
188 fputc('\n', stderr);
189 fprintf_ln(stderr, _("directory stat info changes after "
190 "adding a file inside subdirectory"));
191 goto done;
192 }
193 fputc('.', stderr);
194
195 avoid_racy();
196 xunlink("newfile");
197 xstat_mtime_dir(&st);
198 if (!match_stat_data(&base, &st)) {
199 fputc('\n', stderr);
200 fprintf_ln(stderr, _("directory stat info does not "
201 "change after deleting a file"));
202 goto done;
203 }
204 fill_stat_data(&base, &st);
205 fputc('.', stderr);
206
207 avoid_racy();
208 xunlink("new-dir/new");
209 xrmdir("new-dir");
210 xstat_mtime_dir(&st);
211 if (!match_stat_data(&base, &st)) {
212 fputc('\n', stderr);
213 fprintf_ln(stderr, _("directory stat info does not "
214 "change after deleting a directory"));
215 goto done;
216 }
217
218 if (rmdir(mtime_dir.buf))
219 die_errno(_("failed to delete directory %s"), mtime_dir.buf);
220 fprintf_ln(stderr, _(" OK"));
221 ret = 1;
222
223done:
224 strbuf_release(&mtime_dir);
225 return ret;
226}
227
228static int mark_ce_flags(const char *path, int flag, int mark)
229{
230 int namelen = strlen(path);
231 int pos = cache_name_pos(path, namelen);
232 if (0 <= pos) {
233 mark_fsmonitor_invalid(&the_index, active_cache[pos]);
234 if (mark)
235 active_cache[pos]->ce_flags |= flag;
236 else
237 active_cache[pos]->ce_flags &= ~flag;
238 active_cache[pos]->ce_flags |= CE_UPDATE_IN_BASE;
239 cache_tree_invalidate_path(&the_index, path);
240 active_cache_changed |= CE_ENTRY_CHANGED;
241 return 0;
242 }
243 return -1;
244}
245
246static int remove_one_path(const char *path)
247{
248 if (!allow_remove)
249 return error("%s: does not exist and --remove not passed", path);
250 if (remove_file_from_cache(path))
251 return error("%s: cannot remove from the index", path);
252 return 0;
253}
254
255/*
256 * Handle a path that couldn't be lstat'ed. It's either:
257 * - missing file (ENOENT or ENOTDIR). That's ok if we're
258 * supposed to be removing it and the removal actually
259 * succeeds.
260 * - permission error. That's never ok.
261 */
262static int process_lstat_error(const char *path, int err)
263{
264 if (is_missing_file_error(err))
265 return remove_one_path(path);
266 return error("lstat(\"%s\"): %s", path, strerror(err));
267}
268
269static int add_one_path(const struct cache_entry *old, const char *path, int len, struct stat *st)
270{
271 int option, size;
272 struct cache_entry *ce;
273
274 /* Was the old index entry already up-to-date? */
275 if (old && !ce_stage(old) && !ce_match_stat(old, st, 0))
276 return 0;
277
278 size = cache_entry_size(len);
279 ce = xcalloc(1, size);
280 memcpy(ce->name, path, len);
281 ce->ce_flags = create_ce_flags(0);
282 ce->ce_namelen = len;
283 fill_stat_cache_info(ce, st);
284 ce->ce_mode = ce_mode_from_stat(old, st->st_mode);
285
286 if (index_path(&ce->oid, path, st,
287 info_only ? 0 : HASH_WRITE_OBJECT)) {
288 free(ce);
289 return -1;
290 }
291 option = allow_add ? ADD_CACHE_OK_TO_ADD : 0;
292 option |= allow_replace ? ADD_CACHE_OK_TO_REPLACE : 0;
293 if (add_cache_entry(ce, option)) {
294 free(ce);
295 return error("%s: cannot add to the index - missing --add option?", path);
296 }
297 return 0;
298}
299
300/*
301 * Handle a path that was a directory. Four cases:
302 *
303 * - it's already a gitlink in the index, and we keep it that
304 * way, and update it if we can (if we cannot find the HEAD,
305 * we're going to keep it unchanged in the index!)
306 *
307 * - it's a *file* in the index, in which case it should be
308 * removed as a file if removal is allowed, since it doesn't
309 * exist as such any more. If removal isn't allowed, it's
310 * an error.
311 *
312 * (NOTE! This is old and arguably fairly strange behaviour.
313 * We might want to make this an error unconditionally, and
314 * use "--force-remove" if you actually want to force removal).
315 *
316 * - it used to exist as a subdirectory (ie multiple files with
317 * this particular prefix) in the index, in which case it's wrong
318 * to try to update it as a directory.
319 *
320 * - it doesn't exist at all in the index, but it is a valid
321 * git directory, and it should be *added* as a gitlink.
322 */
323static int process_directory(const char *path, int len, struct stat *st)
324{
325 struct object_id oid;
326 int pos = cache_name_pos(path, len);
327
328 /* Exact match: file or existing gitlink */
329 if (pos >= 0) {
330 const struct cache_entry *ce = active_cache[pos];
331 if (S_ISGITLINK(ce->ce_mode)) {
332
333 /* Do nothing to the index if there is no HEAD! */
334 if (resolve_gitlink_ref(path, "HEAD", &oid) < 0)
335 return 0;
336
337 return add_one_path(ce, path, len, st);
338 }
339 /* Should this be an unconditional error? */
340 return remove_one_path(path);
341 }
342
343 /* Inexact match: is there perhaps a subdirectory match? */
344 pos = -pos-1;
345 while (pos < active_nr) {
346 const struct cache_entry *ce = active_cache[pos++];
347
348 if (strncmp(ce->name, path, len))
349 break;
350 if (ce->name[len] > '/')
351 break;
352 if (ce->name[len] < '/')
353 continue;
354
355 /* Subdirectory match - error out */
356 return error("%s: is a directory - add individual files instead", path);
357 }
358
359 /* No match - should we add it as a gitlink? */
360 if (!resolve_gitlink_ref(path, "HEAD", &oid))
361 return add_one_path(NULL, path, len, st);
362
363 /* Error out. */
364 return error("%s: is a directory - add files inside instead", path);
365}
366
367static int process_path(const char *path, struct stat *st, int stat_errno)
368{
369 int pos, len;
370 const struct cache_entry *ce;
371
372 len = strlen(path);
373 if (has_symlink_leading_path(path, len))
374 return error("'%s' is beyond a symbolic link", path);
375
376 pos = cache_name_pos(path, len);
377 ce = pos < 0 ? NULL : active_cache[pos];
378 if (ce && ce_skip_worktree(ce)) {
379 /*
380 * working directory version is assumed "good"
381 * so updating it does not make sense.
382 * On the other hand, removing it from index should work
383 */
384 if (allow_remove && remove_file_from_cache(path))
385 return error("%s: cannot remove from the index", path);
386 return 0;
387 }
388
389 /*
390 * First things first: get the stat information, to decide
391 * what to do about the pathname!
392 */
393 if (stat_errno)
394 return process_lstat_error(path, stat_errno);
395
396 if (S_ISDIR(st->st_mode))
397 return process_directory(path, len, st);
398
399 return add_one_path(ce, path, len, st);
400}
401
402static int add_cacheinfo(unsigned int mode, const struct object_id *oid,
403 const char *path, int stage)
404{
405 int size, len, option;
406 struct cache_entry *ce;
407
408 if (!verify_path(path, mode))
409 return error("Invalid path '%s'", path);
410
411 len = strlen(path);
412 size = cache_entry_size(len);
413 ce = xcalloc(1, size);
414
415 oidcpy(&ce->oid, oid);
416 memcpy(ce->name, path, len);
417 ce->ce_flags = create_ce_flags(stage);
418 ce->ce_namelen = len;
419 ce->ce_mode = create_ce_mode(mode);
420 if (assume_unchanged)
421 ce->ce_flags |= CE_VALID;
422 option = allow_add ? ADD_CACHE_OK_TO_ADD : 0;
423 option |= allow_replace ? ADD_CACHE_OK_TO_REPLACE : 0;
424 if (add_cache_entry(ce, option))
425 return error("%s: cannot add to the index - missing --add option?",
426 path);
427 report("add '%s'", path);
428 return 0;
429}
430
431static void chmod_path(char flip, const char *path)
432{
433 int pos;
434 struct cache_entry *ce;
435
436 pos = cache_name_pos(path, strlen(path));
437 if (pos < 0)
438 goto fail;
439 ce = active_cache[pos];
440 if (chmod_cache_entry(ce, flip) < 0)
441 goto fail;
442
443 report("chmod %cx '%s'", flip, path);
444 return;
445 fail:
446 die("git update-index: cannot chmod %cx '%s'", flip, path);
447}
448
449static void update_one(const char *path)
450{
451 int stat_errno = 0;
452 struct stat st;
453
454 if (mark_valid_only || mark_skip_worktree_only || force_remove ||
455 mark_fsmonitor_only)
456 st.st_mode = 0;
457 else if (lstat(path, &st) < 0) {
458 st.st_mode = 0;
459 stat_errno = errno;
460 } /* else stat is valid */
461
462 if (!verify_path(path, st.st_mode)) {
463 fprintf(stderr, "Ignoring path %s\n", path);
464 return;
465 }
466 if (mark_valid_only) {
467 if (mark_ce_flags(path, CE_VALID, mark_valid_only == MARK_FLAG))
468 die("Unable to mark file %s", path);
469 return;
470 }
471 if (mark_skip_worktree_only) {
472 if (mark_ce_flags(path, CE_SKIP_WORKTREE, mark_skip_worktree_only == MARK_FLAG))
473 die("Unable to mark file %s", path);
474 return;
475 }
476 if (mark_fsmonitor_only) {
477 if (mark_ce_flags(path, CE_FSMONITOR_VALID, mark_fsmonitor_only == MARK_FLAG))
478 die("Unable to mark file %s", path);
479 return;
480 }
481
482 if (force_remove) {
483 if (remove_file_from_cache(path))
484 die("git update-index: unable to remove %s", path);
485 report("remove '%s'", path);
486 return;
487 }
488 if (process_path(path, &st, stat_errno))
489 die("Unable to process path %s", path);
490 report("add '%s'", path);
491}
492
493static void read_index_info(int nul_term_line)
494{
495 const int hexsz = the_hash_algo->hexsz;
496 struct strbuf buf = STRBUF_INIT;
497 struct strbuf uq = STRBUF_INIT;
498 strbuf_getline_fn getline_fn;
499
500 getline_fn = nul_term_line ? strbuf_getline_nul : strbuf_getline_lf;
501 while (getline_fn(&buf, stdin) != EOF) {
502 char *ptr, *tab;
503 char *path_name;
504 struct object_id oid;
505 unsigned int mode;
506 unsigned long ul;
507 int stage;
508
509 /* This reads lines formatted in one of three formats:
510 *
511 * (1) mode SP sha1 TAB path
512 * The first format is what "git apply --index-info"
513 * reports, and used to reconstruct a partial tree
514 * that is used for phony merge base tree when falling
515 * back on 3-way merge.
516 *
517 * (2) mode SP type SP sha1 TAB path
518 * The second format is to stuff "git ls-tree" output
519 * into the index file.
520 *
521 * (3) mode SP sha1 SP stage TAB path
522 * This format is to put higher order stages into the
523 * index file and matches "git ls-files --stage" output.
524 */
525 errno = 0;
526 ul = strtoul(buf.buf, &ptr, 8);
527 if (ptr == buf.buf || *ptr != ' '
528 || errno || (unsigned int) ul != ul)
529 goto bad_line;
530 mode = ul;
531
532 tab = strchr(ptr, '\t');
533 if (!tab || tab - ptr < hexsz + 1)
534 goto bad_line;
535
536 if (tab[-2] == ' ' && '0' <= tab[-1] && tab[-1] <= '3') {
537 stage = tab[-1] - '0';
538 ptr = tab + 1; /* point at the head of path */
539 tab = tab - 2; /* point at tail of sha1 */
540 }
541 else {
542 stage = 0;
543 ptr = tab + 1; /* point at the head of path */
544 }
545
546 if (get_oid_hex(tab - hexsz, &oid) ||
547 tab[-(hexsz + 1)] != ' ')
548 goto bad_line;
549
550 path_name = ptr;
551 if (!nul_term_line && path_name[0] == '"') {
552 strbuf_reset(&uq);
553 if (unquote_c_style(&uq, path_name, NULL)) {
554 die("git update-index: bad quoting of path name");
555 }
556 path_name = uq.buf;
557 }
558
559 if (!verify_path(path_name, mode)) {
560 fprintf(stderr, "Ignoring path %s\n", path_name);
561 continue;
562 }
563
564 if (!mode) {
565 /* mode == 0 means there is no such path -- remove */
566 if (remove_file_from_cache(path_name))
567 die("git update-index: unable to remove %s",
568 ptr);
569 }
570 else {
571 /* mode ' ' sha1 '\t' name
572 * ptr[-1] points at tab,
573 * ptr[-41] is at the beginning of sha1
574 */
575 ptr[-(hexsz + 2)] = ptr[-1] = 0;
576 if (add_cacheinfo(mode, &oid, path_name, stage))
577 die("git update-index: unable to update %s",
578 path_name);
579 }
580 continue;
581
582 bad_line:
583 die("malformed index info %s", buf.buf);
584 }
585 strbuf_release(&buf);
586 strbuf_release(&uq);
587}
588
589static const char * const update_index_usage[] = {
590 N_("git update-index [<options>] [--] [<file>...]"),
591 NULL
592};
593
594static struct object_id head_oid;
595static struct object_id merge_head_oid;
596
597static struct cache_entry *read_one_ent(const char *which,
598 struct object_id *ent, const char *path,
599 int namelen, int stage)
600{
601 unsigned mode;
602 struct object_id oid;
603 int size;
604 struct cache_entry *ce;
605
606 if (get_tree_entry(ent, path, &oid, &mode)) {
607 if (which)
608 error("%s: not in %s branch.", path, which);
609 return NULL;
610 }
611 if (mode == S_IFDIR) {
612 if (which)
613 error("%s: not a blob in %s branch.", path, which);
614 return NULL;
615 }
616 size = cache_entry_size(namelen);
617 ce = xcalloc(1, size);
618
619 oidcpy(&ce->oid, &oid);
620 memcpy(ce->name, path, namelen);
621 ce->ce_flags = create_ce_flags(stage);
622 ce->ce_namelen = namelen;
623 ce->ce_mode = create_ce_mode(mode);
624 return ce;
625}
626
627static int unresolve_one(const char *path)
628{
629 int namelen = strlen(path);
630 int pos;
631 int ret = 0;
632 struct cache_entry *ce_2 = NULL, *ce_3 = NULL;
633
634 /* See if there is such entry in the index. */
635 pos = cache_name_pos(path, namelen);
636 if (0 <= pos) {
637 /* already merged */
638 pos = unmerge_cache_entry_at(pos);
639 if (pos < active_nr) {
640 const struct cache_entry *ce = active_cache[pos];
641 if (ce_stage(ce) &&
642 ce_namelen(ce) == namelen &&
643 !memcmp(ce->name, path, namelen))
644 return 0;
645 }
646 /* no resolve-undo information; fall back */
647 } else {
648 /* If there isn't, either it is unmerged, or
649 * resolved as "removed" by mistake. We do not
650 * want to do anything in the former case.
651 */
652 pos = -pos-1;
653 if (pos < active_nr) {
654 const struct cache_entry *ce = active_cache[pos];
655 if (ce_namelen(ce) == namelen &&
656 !memcmp(ce->name, path, namelen)) {
657 fprintf(stderr,
658 "%s: skipping still unmerged path.\n",
659 path);
660 goto free_return;
661 }
662 }
663 }
664
665 /* Grab blobs from given path from HEAD and MERGE_HEAD,
666 * stuff HEAD version in stage #2,
667 * stuff MERGE_HEAD version in stage #3.
668 */
669 ce_2 = read_one_ent("our", &head_oid, path, namelen, 2);
670 ce_3 = read_one_ent("their", &merge_head_oid, path, namelen, 3);
671
672 if (!ce_2 || !ce_3) {
673 ret = -1;
674 goto free_return;
675 }
676 if (!oidcmp(&ce_2->oid, &ce_3->oid) &&
677 ce_2->ce_mode == ce_3->ce_mode) {
678 fprintf(stderr, "%s: identical in both, skipping.\n",
679 path);
680 goto free_return;
681 }
682
683 remove_file_from_cache(path);
684 if (add_cache_entry(ce_2, ADD_CACHE_OK_TO_ADD)) {
685 error("%s: cannot add our version to the index.", path);
686 ret = -1;
687 goto free_return;
688 }
689 if (!add_cache_entry(ce_3, ADD_CACHE_OK_TO_ADD))
690 return 0;
691 error("%s: cannot add their version to the index.", path);
692 ret = -1;
693 free_return:
694 free(ce_2);
695 free(ce_3);
696 return ret;
697}
698
699static void read_head_pointers(void)
700{
701 if (read_ref("HEAD", &head_oid))
702 die("No HEAD -- no initial commit yet?");
703 if (read_ref("MERGE_HEAD", &merge_head_oid)) {
704 fprintf(stderr, "Not in the middle of a merge.\n");
705 exit(0);
706 }
707}
708
709static int do_unresolve(int ac, const char **av,
710 const char *prefix, int prefix_length)
711{
712 int i;
713 int err = 0;
714
715 /* Read HEAD and MERGE_HEAD; if MERGE_HEAD does not exist, we
716 * are not doing a merge, so exit with success status.
717 */
718 read_head_pointers();
719
720 for (i = 1; i < ac; i++) {
721 const char *arg = av[i];
722 char *p = prefix_path(prefix, prefix_length, arg);
723 err |= unresolve_one(p);
724 free(p);
725 }
726 return err;
727}
728
729static int do_reupdate(int ac, const char **av,
730 const char *prefix, int prefix_length)
731{
732 /* Read HEAD and run update-index on paths that are
733 * merged and already different between index and HEAD.
734 */
735 int pos;
736 int has_head = 1;
737 struct pathspec pathspec;
738
739 parse_pathspec(&pathspec, 0,
740 PATHSPEC_PREFER_CWD,
741 prefix, av + 1);
742
743 if (read_ref("HEAD", &head_oid))
744 /* If there is no HEAD, that means it is an initial
745 * commit. Update everything in the index.
746 */
747 has_head = 0;
748 redo:
749 for (pos = 0; pos < active_nr; pos++) {
750 const struct cache_entry *ce = active_cache[pos];
751 struct cache_entry *old = NULL;
752 int save_nr;
753 char *path;
754
755 if (ce_stage(ce) || !ce_path_match(ce, &pathspec, NULL))
756 continue;
757 if (has_head)
758 old = read_one_ent(NULL, &head_oid,
759 ce->name, ce_namelen(ce), 0);
760 if (old && ce->ce_mode == old->ce_mode &&
761 !oidcmp(&ce->oid, &old->oid)) {
762 free(old);
763 continue; /* unchanged */
764 }
765 /* Be careful. The working tree may not have the
766 * path anymore, in which case, under 'allow_remove',
767 * or worse yet 'allow_replace', active_nr may decrease.
768 */
769 save_nr = active_nr;
770 path = xstrdup(ce->name);
771 update_one(path);
772 free(path);
773 free(old);
774 if (save_nr != active_nr)
775 goto redo;
776 }
777 clear_pathspec(&pathspec);
778 return 0;
779}
780
781struct refresh_params {
782 unsigned int flags;
783 int *has_errors;
784};
785
786static int refresh(struct refresh_params *o, unsigned int flag)
787{
788 setup_work_tree();
789 read_cache_preload(NULL);
790 *o->has_errors |= refresh_cache(o->flags | flag);
791 return 0;
792}
793
794static int refresh_callback(const struct option *opt,
795 const char *arg, int unset)
796{
797 return refresh(opt->value, 0);
798}
799
800static int really_refresh_callback(const struct option *opt,
801 const char *arg, int unset)
802{
803 return refresh(opt->value, REFRESH_REALLY);
804}
805
806static int chmod_callback(const struct option *opt,
807 const char *arg, int unset)
808{
809 char *flip = opt->value;
810 if ((arg[0] != '-' && arg[0] != '+') || arg[1] != 'x' || arg[2])
811 return error("option 'chmod' expects \"+x\" or \"-x\"");
812 *flip = arg[0];
813 return 0;
814}
815
816static int resolve_undo_clear_callback(const struct option *opt,
817 const char *arg, int unset)
818{
819 resolve_undo_clear();
820 return 0;
821}
822
823static int parse_new_style_cacheinfo(const char *arg,
824 unsigned int *mode,
825 struct object_id *oid,
826 const char **path)
827{
828 unsigned long ul;
829 char *endp;
830 const char *p;
831
832 if (!arg)
833 return -1;
834
835 errno = 0;
836 ul = strtoul(arg, &endp, 8);
837 if (errno || endp == arg || *endp != ',' || (unsigned int) ul != ul)
838 return -1; /* not a new-style cacheinfo */
839 *mode = ul;
840 endp++;
841 if (parse_oid_hex(endp, oid, &p) || *p != ',')
842 return -1;
843 *path = p + 1;
844 return 0;
845}
846
847static int cacheinfo_callback(struct parse_opt_ctx_t *ctx,
848 const struct option *opt, int unset)
849{
850 struct object_id oid;
851 unsigned int mode;
852 const char *path;
853
854 if (!parse_new_style_cacheinfo(ctx->argv[1], &mode, &oid, &path)) {
855 if (add_cacheinfo(mode, &oid, path, 0))
856 die("git update-index: --cacheinfo cannot add %s", path);
857 ctx->argv++;
858 ctx->argc--;
859 return 0;
860 }
861 if (ctx->argc <= 3)
862 return error("option 'cacheinfo' expects <mode>,<sha1>,<path>");
863 if (strtoul_ui(*++ctx->argv, 8, &mode) ||
864 get_oid_hex(*++ctx->argv, &oid) ||
865 add_cacheinfo(mode, &oid, *++ctx->argv, 0))
866 die("git update-index: --cacheinfo cannot add %s", *ctx->argv);
867 ctx->argc -= 3;
868 return 0;
869}
870
871static int stdin_cacheinfo_callback(struct parse_opt_ctx_t *ctx,
872 const struct option *opt, int unset)
873{
874 int *nul_term_line = opt->value;
875
876 if (ctx->argc != 1)
877 return error("option '%s' must be the last argument", opt->long_name);
878 allow_add = allow_replace = allow_remove = 1;
879 read_index_info(*nul_term_line);
880 return 0;
881}
882
883static int stdin_callback(struct parse_opt_ctx_t *ctx,
884 const struct option *opt, int unset)
885{
886 int *read_from_stdin = opt->value;
887
888 if (ctx->argc != 1)
889 return error("option '%s' must be the last argument", opt->long_name);
890 *read_from_stdin = 1;
891 return 0;
892}
893
894static int unresolve_callback(struct parse_opt_ctx_t *ctx,
895 const struct option *opt, int flags)
896{
897 int *has_errors = opt->value;
898 const char *prefix = startup_info->prefix;
899
900 /* consume remaining arguments. */
901 *has_errors = do_unresolve(ctx->argc, ctx->argv,
902 prefix, prefix ? strlen(prefix) : 0);
903 if (*has_errors)
904 active_cache_changed = 0;
905
906 ctx->argv += ctx->argc - 1;
907 ctx->argc = 1;
908 return 0;
909}
910
911static int reupdate_callback(struct parse_opt_ctx_t *ctx,
912 const struct option *opt, int flags)
913{
914 int *has_errors = opt->value;
915 const char *prefix = startup_info->prefix;
916
917 /* consume remaining arguments. */
918 setup_work_tree();
919 *has_errors = do_reupdate(ctx->argc, ctx->argv,
920 prefix, prefix ? strlen(prefix) : 0);
921 if (*has_errors)
922 active_cache_changed = 0;
923
924 ctx->argv += ctx->argc - 1;
925 ctx->argc = 1;
926 return 0;
927}
928
929int cmd_update_index(int argc, const char **argv, const char *prefix)
930{
931 int newfd, entries, has_errors = 0, nul_term_line = 0;
932 enum uc_mode untracked_cache = UC_UNSPECIFIED;
933 int read_from_stdin = 0;
934 int prefix_length = prefix ? strlen(prefix) : 0;
935 int preferred_index_format = 0;
936 char set_executable_bit = 0;
937 struct refresh_params refresh_args = {0, &has_errors};
938 int lock_error = 0;
939 int split_index = -1;
940 int force_write = 0;
941 int fsmonitor = -1;
942 struct lock_file lock_file = LOCK_INIT;
943 struct parse_opt_ctx_t ctx;
944 strbuf_getline_fn getline_fn;
945 int parseopt_state = PARSE_OPT_UNKNOWN;
946 struct option options[] = {
947 OPT_BIT('q', NULL, &refresh_args.flags,
948 N_("continue refresh even when index needs update"),
949 REFRESH_QUIET),
950 OPT_BIT(0, "ignore-submodules", &refresh_args.flags,
951 N_("refresh: ignore submodules"),
952 REFRESH_IGNORE_SUBMODULES),
953 OPT_SET_INT(0, "add", &allow_add,
954 N_("do not ignore new files"), 1),
955 OPT_SET_INT(0, "replace", &allow_replace,
956 N_("let files replace directories and vice-versa"), 1),
957 OPT_SET_INT(0, "remove", &allow_remove,
958 N_("notice files missing from worktree"), 1),
959 OPT_BIT(0, "unmerged", &refresh_args.flags,
960 N_("refresh even if index contains unmerged entries"),
961 REFRESH_UNMERGED),
962 {OPTION_CALLBACK, 0, "refresh", &refresh_args, NULL,
963 N_("refresh stat information"),
964 PARSE_OPT_NOARG | PARSE_OPT_NONEG,
965 refresh_callback},
966 {OPTION_CALLBACK, 0, "really-refresh", &refresh_args, NULL,
967 N_("like --refresh, but ignore assume-unchanged setting"),
968 PARSE_OPT_NOARG | PARSE_OPT_NONEG,
969 really_refresh_callback},
970 {OPTION_LOWLEVEL_CALLBACK, 0, "cacheinfo", NULL,
971 N_("<mode>,<object>,<path>"),
972 N_("add the specified entry to the index"),
973 PARSE_OPT_NOARG | /* disallow --cacheinfo=<mode> form */
974 PARSE_OPT_NONEG | PARSE_OPT_LITERAL_ARGHELP,
975 (parse_opt_cb *) cacheinfo_callback},
976 {OPTION_CALLBACK, 0, "chmod", &set_executable_bit, N_("(+/-)x"),
977 N_("override the executable bit of the listed files"),
978 PARSE_OPT_NONEG | PARSE_OPT_LITERAL_ARGHELP,
979 chmod_callback},
980 {OPTION_SET_INT, 0, "assume-unchanged", &mark_valid_only, NULL,
981 N_("mark files as \"not changing\""),
982 PARSE_OPT_NOARG | PARSE_OPT_NONEG, NULL, MARK_FLAG},
983 {OPTION_SET_INT, 0, "no-assume-unchanged", &mark_valid_only, NULL,
984 N_("clear assumed-unchanged bit"),
985 PARSE_OPT_NOARG | PARSE_OPT_NONEG, NULL, UNMARK_FLAG},
986 {OPTION_SET_INT, 0, "skip-worktree", &mark_skip_worktree_only, NULL,
987 N_("mark files as \"index-only\""),
988 PARSE_OPT_NOARG | PARSE_OPT_NONEG, NULL, MARK_FLAG},
989 {OPTION_SET_INT, 0, "no-skip-worktree", &mark_skip_worktree_only, NULL,
990 N_("clear skip-worktree bit"),
991 PARSE_OPT_NOARG | PARSE_OPT_NONEG, NULL, UNMARK_FLAG},
992 OPT_SET_INT(0, "info-only", &info_only,
993 N_("add to index only; do not add content to object database"), 1),
994 OPT_SET_INT(0, "force-remove", &force_remove,
995 N_("remove named paths even if present in worktree"), 1),
996 OPT_BOOL('z', NULL, &nul_term_line,
997 N_("with --stdin: input lines are terminated by null bytes")),
998 {OPTION_LOWLEVEL_CALLBACK, 0, "stdin", &read_from_stdin, NULL,
999 N_("read list of paths to be updated from standard input"),
1000 PARSE_OPT_NONEG | PARSE_OPT_NOARG,
1001 (parse_opt_cb *) stdin_callback},
1002 {OPTION_LOWLEVEL_CALLBACK, 0, "index-info", &nul_term_line, NULL,
1003 N_("add entries from standard input to the index"),
1004 PARSE_OPT_NONEG | PARSE_OPT_NOARG,
1005 (parse_opt_cb *) stdin_cacheinfo_callback},
1006 {OPTION_LOWLEVEL_CALLBACK, 0, "unresolve", &has_errors, NULL,
1007 N_("repopulate stages #2 and #3 for the listed paths"),
1008 PARSE_OPT_NONEG | PARSE_OPT_NOARG,
1009 (parse_opt_cb *) unresolve_callback},
1010 {OPTION_LOWLEVEL_CALLBACK, 'g', "again", &has_errors, NULL,
1011 N_("only update entries that differ from HEAD"),
1012 PARSE_OPT_NONEG | PARSE_OPT_NOARG,
1013 (parse_opt_cb *) reupdate_callback},
1014 OPT_BIT(0, "ignore-missing", &refresh_args.flags,
1015 N_("ignore files missing from worktree"),
1016 REFRESH_IGNORE_MISSING),
1017 OPT_SET_INT(0, "verbose", &verbose,
1018 N_("report actions to standard output"), 1),
1019 {OPTION_CALLBACK, 0, "clear-resolve-undo", NULL, NULL,
1020 N_("(for porcelains) forget saved unresolved conflicts"),
1021 PARSE_OPT_NOARG | PARSE_OPT_NONEG,
1022 resolve_undo_clear_callback},
1023 OPT_INTEGER(0, "index-version", &preferred_index_format,
1024 N_("write index in this format")),
1025 OPT_BOOL(0, "split-index", &split_index,
1026 N_("enable or disable split index")),
1027 OPT_BOOL(0, "untracked-cache", &untracked_cache,
1028 N_("enable/disable untracked cache")),
1029 OPT_SET_INT(0, "test-untracked-cache", &untracked_cache,
1030 N_("test if the filesystem supports untracked cache"), UC_TEST),
1031 OPT_SET_INT(0, "force-untracked-cache", &untracked_cache,
1032 N_("enable untracked cache without testing the filesystem"), UC_FORCE),
1033 OPT_SET_INT(0, "force-write-index", &force_write,
1034 N_("write out the index even if is not flagged as changed"), 1),
1035 OPT_BOOL(0, "fsmonitor", &fsmonitor,
1036 N_("enable or disable file system monitor")),
1037 {OPTION_SET_INT, 0, "fsmonitor-valid", &mark_fsmonitor_only, NULL,
1038 N_("mark files as fsmonitor valid"),
1039 PARSE_OPT_NOARG | PARSE_OPT_NONEG, NULL, MARK_FLAG},
1040 {OPTION_SET_INT, 0, "no-fsmonitor-valid", &mark_fsmonitor_only, NULL,
1041 N_("clear fsmonitor valid bit"),
1042 PARSE_OPT_NOARG | PARSE_OPT_NONEG, NULL, UNMARK_FLAG},
1043 OPT_END()
1044 };
1045
1046 if (argc == 2 && !strcmp(argv[1], "-h"))
1047 usage_with_options(update_index_usage, options);
1048
1049 git_config(git_default_config, NULL);
1050
1051 /* we will diagnose later if it turns out that we need to update it */
1052 newfd = hold_locked_index(&lock_file, 0);
1053 if (newfd < 0)
1054 lock_error = errno;
1055
1056 entries = read_cache();
1057 if (entries < 0)
1058 die("cache corrupted");
1059
1060 /*
1061 * Custom copy of parse_options() because we want to handle
1062 * filename arguments as they come.
1063 */
1064 parse_options_start(&ctx, argc, argv, prefix,
1065 options, PARSE_OPT_STOP_AT_NON_OPTION);
1066 while (ctx.argc) {
1067 if (parseopt_state != PARSE_OPT_DONE)
1068 parseopt_state = parse_options_step(&ctx, options,
1069 update_index_usage);
1070 if (!ctx.argc)
1071 break;
1072 switch (parseopt_state) {
1073 case PARSE_OPT_HELP:
1074 case PARSE_OPT_ERROR:
1075 exit(129);
1076 case PARSE_OPT_NON_OPTION:
1077 case PARSE_OPT_DONE:
1078 {
1079 const char *path = ctx.argv[0];
1080 char *p;
1081
1082 setup_work_tree();
1083 p = prefix_path(prefix, prefix_length, path);
1084 update_one(p);
1085 if (set_executable_bit)
1086 chmod_path(set_executable_bit, p);
1087 free(p);
1088 ctx.argc--;
1089 ctx.argv++;
1090 break;
1091 }
1092 case PARSE_OPT_UNKNOWN:
1093 if (ctx.argv[0][1] == '-')
1094 error("unknown option '%s'", ctx.argv[0] + 2);
1095 else
1096 error("unknown switch '%c'", *ctx.opt);
1097 usage_with_options(update_index_usage, options);
1098 }
1099 }
1100 argc = parse_options_end(&ctx);
1101
1102 getline_fn = nul_term_line ? strbuf_getline_nul : strbuf_getline_lf;
1103 if (preferred_index_format) {
1104 if (preferred_index_format < INDEX_FORMAT_LB ||
1105 INDEX_FORMAT_UB < preferred_index_format)
1106 die("index-version %d not in range: %d..%d",
1107 preferred_index_format,
1108 INDEX_FORMAT_LB, INDEX_FORMAT_UB);
1109
1110 if (the_index.version != preferred_index_format)
1111 active_cache_changed |= SOMETHING_CHANGED;
1112 the_index.version = preferred_index_format;
1113 }
1114
1115 if (read_from_stdin) {
1116 struct strbuf buf = STRBUF_INIT;
1117 struct strbuf unquoted = STRBUF_INIT;
1118
1119 setup_work_tree();
1120 while (getline_fn(&buf, stdin) != EOF) {
1121 char *p;
1122 if (!nul_term_line && buf.buf[0] == '"') {
1123 strbuf_reset(&unquoted);
1124 if (unquote_c_style(&unquoted, buf.buf, NULL))
1125 die("line is badly quoted");
1126 strbuf_swap(&buf, &unquoted);
1127 }
1128 p = prefix_path(prefix, prefix_length, buf.buf);
1129 update_one(p);
1130 if (set_executable_bit)
1131 chmod_path(set_executable_bit, p);
1132 free(p);
1133 }
1134 strbuf_release(&unquoted);
1135 strbuf_release(&buf);
1136 }
1137
1138 if (split_index > 0) {
1139 if (git_config_get_split_index() == 0)
1140 warning(_("core.splitIndex is set to false; "
1141 "remove or change it, if you really want to "
1142 "enable split index"));
1143 if (the_index.split_index)
1144 the_index.cache_changed |= SPLIT_INDEX_ORDERED;
1145 else
1146 add_split_index(&the_index);
1147 } else if (!split_index) {
1148 if (git_config_get_split_index() == 1)
1149 warning(_("core.splitIndex is set to true; "
1150 "remove or change it, if you really want to "
1151 "disable split index"));
1152 remove_split_index(&the_index);
1153 }
1154
1155 switch (untracked_cache) {
1156 case UC_UNSPECIFIED:
1157 break;
1158 case UC_DISABLE:
1159 if (git_config_get_untracked_cache() == 1)
1160 warning(_("core.untrackedCache is set to true; "
1161 "remove or change it, if you really want to "
1162 "disable the untracked cache"));
1163 remove_untracked_cache(&the_index);
1164 report(_("Untracked cache disabled"));
1165 break;
1166 case UC_TEST:
1167 setup_work_tree();
1168 return !test_if_untracked_cache_is_supported();
1169 case UC_ENABLE:
1170 case UC_FORCE:
1171 if (git_config_get_untracked_cache() == 0)
1172 warning(_("core.untrackedCache is set to false; "
1173 "remove or change it, if you really want to "
1174 "enable the untracked cache"));
1175 add_untracked_cache(&the_index);
1176 report(_("Untracked cache enabled for '%s'"), get_git_work_tree());
1177 break;
1178 default:
1179 BUG("bad untracked_cache value: %d", untracked_cache);
1180 }
1181
1182 if (fsmonitor > 0) {
1183 if (git_config_get_fsmonitor() == 0)
1184 warning(_("core.fsmonitor is unset; "
1185 "set it if you really want to "
1186 "enable fsmonitor"));
1187 add_fsmonitor(&the_index);
1188 report(_("fsmonitor enabled"));
1189 } else if (!fsmonitor) {
1190 if (git_config_get_fsmonitor() == 1)
1191 warning(_("core.fsmonitor is set; "
1192 "remove it if you really want to "
1193 "disable fsmonitor"));
1194 remove_fsmonitor(&the_index);
1195 report(_("fsmonitor disabled"));
1196 }
1197
1198 if (active_cache_changed || force_write) {
1199 if (newfd < 0) {
1200 if (refresh_args.flags & REFRESH_QUIET)
1201 exit(128);
1202 unable_to_lock_die(get_index_file(), lock_error);
1203 }
1204 if (write_locked_index(&the_index, &lock_file, COMMIT_LOCK))
1205 die("Unable to write new index file");
1206 }
1207
1208 rollback_lock_file(&lock_file);
1209
1210 return has_errors ? 1 : 0;
1211}