1/*
2 * GIT - The information manager from hell
3 *
4 * Copyright (C) Linus Torvalds, 2005
5 */
6#include "cache.h"
7#include "quote.h"
8#include "cache-tree.h"
9#include "tree-walk.h"
10#include "builtin.h"
11#include "refs.h"
12#include "resolve-undo.h"
13#include "parse-options.h"
14#include "pathspec.h"
15
16/*
17 * Default to not allowing changes to the list of files. The
18 * tool doesn't actually care, but this makes it harder to add
19 * files to the revision control by mistake by doing something
20 * like "git update-index *" and suddenly having all the object
21 * files be revision controlled.
22 */
23static int allow_add;
24static int allow_remove;
25static int allow_replace;
26static int info_only;
27static int force_remove;
28static int verbose;
29static int mark_valid_only;
30static int mark_skip_worktree_only;
31#define MARK_FLAG 1
32#define UNMARK_FLAG 2
33
34__attribute__((format (printf, 1, 2)))
35static void report(const char *fmt, ...)
36{
37 va_list vp;
38
39 if (!verbose)
40 return;
41
42 va_start(vp, fmt);
43 vprintf(fmt, vp);
44 putchar('\n');
45 va_end(vp);
46}
47
48static int mark_ce_flags(const char *path, int flag, int mark)
49{
50 int namelen = strlen(path);
51 int pos = cache_name_pos(path, namelen);
52 if (0 <= pos) {
53 if (mark)
54 active_cache[pos]->ce_flags |= flag;
55 else
56 active_cache[pos]->ce_flags &= ~flag;
57 cache_tree_invalidate_path(active_cache_tree, path);
58 active_cache_changed = 1;
59 return 0;
60 }
61 return -1;
62}
63
64static int remove_one_path(const char *path)
65{
66 if (!allow_remove)
67 return error("%s: does not exist and --remove not passed", path);
68 if (remove_file_from_cache(path))
69 return error("%s: cannot remove from the index", path);
70 return 0;
71}
72
73/*
74 * Handle a path that couldn't be lstat'ed. It's either:
75 * - missing file (ENOENT or ENOTDIR). That's ok if we're
76 * supposed to be removing it and the removal actually
77 * succeeds.
78 * - permission error. That's never ok.
79 */
80static int process_lstat_error(const char *path, int err)
81{
82 if (err == ENOENT || err == ENOTDIR)
83 return remove_one_path(path);
84 return error("lstat(\"%s\"): %s", path, strerror(errno));
85}
86
87static int add_one_path(struct cache_entry *old, const char *path, int len, struct stat *st)
88{
89 int option, size;
90 struct cache_entry *ce;
91
92 /* Was the old index entry already up-to-date? */
93 if (old && !ce_stage(old) && !ce_match_stat(old, st, 0))
94 return 0;
95
96 size = cache_entry_size(len);
97 ce = xcalloc(1, size);
98 memcpy(ce->name, path, len);
99 ce->ce_flags = create_ce_flags(0);
100 ce->ce_namelen = len;
101 fill_stat_cache_info(ce, st);
102 ce->ce_mode = ce_mode_from_stat(old, st->st_mode);
103
104 if (index_path(ce->sha1, path, st,
105 info_only ? 0 : HASH_WRITE_OBJECT)) {
106 free(ce);
107 return -1;
108 }
109 option = allow_add ? ADD_CACHE_OK_TO_ADD : 0;
110 option |= allow_replace ? ADD_CACHE_OK_TO_REPLACE : 0;
111 if (add_cache_entry(ce, option))
112 return error("%s: cannot add to the index - missing --add option?", path);
113 return 0;
114}
115
116/*
117 * Handle a path that was a directory. Four cases:
118 *
119 * - it's already a gitlink in the index, and we keep it that
120 * way, and update it if we can (if we cannot find the HEAD,
121 * we're going to keep it unchanged in the index!)
122 *
123 * - it's a *file* in the index, in which case it should be
124 * removed as a file if removal is allowed, since it doesn't
125 * exist as such any more. If removal isn't allowed, it's
126 * an error.
127 *
128 * (NOTE! This is old and arguably fairly strange behaviour.
129 * We might want to make this an error unconditionally, and
130 * use "--force-remove" if you actually want to force removal).
131 *
132 * - it used to exist as a subdirectory (ie multiple files with
133 * this particular prefix) in the index, in which case it's wrong
134 * to try to update it as a directory.
135 *
136 * - it doesn't exist at all in the index, but it is a valid
137 * git directory, and it should be *added* as a gitlink.
138 */
139static int process_directory(const char *path, int len, struct stat *st)
140{
141 unsigned char sha1[20];
142 int pos = cache_name_pos(path, len);
143
144 /* Exact match: file or existing gitlink */
145 if (pos >= 0) {
146 struct cache_entry *ce = active_cache[pos];
147 if (S_ISGITLINK(ce->ce_mode)) {
148
149 /* Do nothing to the index if there is no HEAD! */
150 if (resolve_gitlink_ref(path, "HEAD", sha1) < 0)
151 return 0;
152
153 return add_one_path(ce, path, len, st);
154 }
155 /* Should this be an unconditional error? */
156 return remove_one_path(path);
157 }
158
159 /* Inexact match: is there perhaps a subdirectory match? */
160 pos = -pos-1;
161 while (pos < active_nr) {
162 struct cache_entry *ce = active_cache[pos++];
163
164 if (strncmp(ce->name, path, len))
165 break;
166 if (ce->name[len] > '/')
167 break;
168 if (ce->name[len] < '/')
169 continue;
170
171 /* Subdirectory match - error out */
172 return error("%s: is a directory - add individual files instead", path);
173 }
174
175 /* No match - should we add it as a gitlink? */
176 if (!resolve_gitlink_ref(path, "HEAD", sha1))
177 return add_one_path(NULL, path, len, st);
178
179 /* Error out. */
180 return error("%s: is a directory - add files inside instead", path);
181}
182
183static int process_path(const char *path)
184{
185 int pos, len;
186 struct stat st;
187 struct cache_entry *ce;
188
189 len = strlen(path);
190 if (has_symlink_leading_path(path, len))
191 return error("'%s' is beyond a symbolic link", path);
192
193 pos = cache_name_pos(path, len);
194 ce = pos < 0 ? NULL : active_cache[pos];
195 if (ce && ce_skip_worktree(ce)) {
196 /*
197 * working directory version is assumed "good"
198 * so updating it does not make sense.
199 * On the other hand, removing it from index should work
200 */
201 if (allow_remove && remove_file_from_cache(path))
202 return error("%s: cannot remove from the index", path);
203 return 0;
204 }
205
206 /*
207 * First things first: get the stat information, to decide
208 * what to do about the pathname!
209 */
210 if (lstat(path, &st) < 0)
211 return process_lstat_error(path, errno);
212
213 if (S_ISDIR(st.st_mode))
214 return process_directory(path, len, &st);
215
216 return add_one_path(ce, path, len, &st);
217}
218
219static int add_cacheinfo(unsigned int mode, const unsigned char *sha1,
220 const char *path, int stage)
221{
222 int size, len, option;
223 struct cache_entry *ce;
224
225 if (!verify_path(path))
226 return error("Invalid path '%s'", path);
227
228 len = strlen(path);
229 size = cache_entry_size(len);
230 ce = xcalloc(1, size);
231
232 hashcpy(ce->sha1, sha1);
233 memcpy(ce->name, path, len);
234 ce->ce_flags = create_ce_flags(stage);
235 ce->ce_namelen = len;
236 ce->ce_mode = create_ce_mode(mode);
237 if (assume_unchanged)
238 ce->ce_flags |= CE_VALID;
239 option = allow_add ? ADD_CACHE_OK_TO_ADD : 0;
240 option |= allow_replace ? ADD_CACHE_OK_TO_REPLACE : 0;
241 if (add_cache_entry(ce, option))
242 return error("%s: cannot add to the index - missing --add option?",
243 path);
244 report("add '%s'", path);
245 return 0;
246}
247
248static void chmod_path(int flip, const char *path)
249{
250 int pos;
251 struct cache_entry *ce;
252 unsigned int mode;
253
254 pos = cache_name_pos(path, strlen(path));
255 if (pos < 0)
256 goto fail;
257 ce = active_cache[pos];
258 mode = ce->ce_mode;
259 if (!S_ISREG(mode))
260 goto fail;
261 switch (flip) {
262 case '+':
263 ce->ce_mode |= 0111; break;
264 case '-':
265 ce->ce_mode &= ~0111; break;
266 default:
267 goto fail;
268 }
269 cache_tree_invalidate_path(active_cache_tree, path);
270 active_cache_changed = 1;
271 report("chmod %cx '%s'", flip, path);
272 return;
273 fail:
274 die("git update-index: cannot chmod %cx '%s'", flip, path);
275}
276
277static void update_one(const char *path, const char *prefix, int prefix_length)
278{
279 const char *p = prefix_path(prefix, prefix_length, path);
280 if (!verify_path(p)) {
281 fprintf(stderr, "Ignoring path %s\n", path);
282 goto free_return;
283 }
284 if (mark_valid_only) {
285 if (mark_ce_flags(p, CE_VALID, mark_valid_only == MARK_FLAG))
286 die("Unable to mark file %s", path);
287 goto free_return;
288 }
289 if (mark_skip_worktree_only) {
290 if (mark_ce_flags(p, CE_SKIP_WORKTREE, mark_skip_worktree_only == MARK_FLAG))
291 die("Unable to mark file %s", path);
292 goto free_return;
293 }
294
295 if (force_remove) {
296 if (remove_file_from_cache(p))
297 die("git update-index: unable to remove %s", path);
298 report("remove '%s'", path);
299 goto free_return;
300 }
301 if (process_path(p))
302 die("Unable to process path %s", path);
303 report("add '%s'", path);
304 free_return:
305 if (p < path || p > path + strlen(path))
306 free((char *)p);
307}
308
309static void read_index_info(int line_termination)
310{
311 struct strbuf buf = STRBUF_INIT;
312 struct strbuf uq = STRBUF_INIT;
313
314 while (strbuf_getline(&buf, stdin, line_termination) != EOF) {
315 char *ptr, *tab;
316 char *path_name;
317 unsigned char sha1[20];
318 unsigned int mode;
319 unsigned long ul;
320 int stage;
321
322 /* This reads lines formatted in one of three formats:
323 *
324 * (1) mode SP sha1 TAB path
325 * The first format is what "git apply --index-info"
326 * reports, and used to reconstruct a partial tree
327 * that is used for phony merge base tree when falling
328 * back on 3-way merge.
329 *
330 * (2) mode SP type SP sha1 TAB path
331 * The second format is to stuff "git ls-tree" output
332 * into the index file.
333 *
334 * (3) mode SP sha1 SP stage TAB path
335 * This format is to put higher order stages into the
336 * index file and matches "git ls-files --stage" output.
337 */
338 errno = 0;
339 ul = strtoul(buf.buf, &ptr, 8);
340 if (ptr == buf.buf || *ptr != ' '
341 || errno || (unsigned int) ul != ul)
342 goto bad_line;
343 mode = ul;
344
345 tab = strchr(ptr, '\t');
346 if (!tab || tab - ptr < 41)
347 goto bad_line;
348
349 if (tab[-2] == ' ' && '0' <= tab[-1] && tab[-1] <= '3') {
350 stage = tab[-1] - '0';
351 ptr = tab + 1; /* point at the head of path */
352 tab = tab - 2; /* point at tail of sha1 */
353 }
354 else {
355 stage = 0;
356 ptr = tab + 1; /* point at the head of path */
357 }
358
359 if (get_sha1_hex(tab - 40, sha1) || tab[-41] != ' ')
360 goto bad_line;
361
362 path_name = ptr;
363 if (line_termination && path_name[0] == '"') {
364 strbuf_reset(&uq);
365 if (unquote_c_style(&uq, path_name, NULL)) {
366 die("git update-index: bad quoting of path name");
367 }
368 path_name = uq.buf;
369 }
370
371 if (!verify_path(path_name)) {
372 fprintf(stderr, "Ignoring path %s\n", path_name);
373 continue;
374 }
375
376 if (!mode) {
377 /* mode == 0 means there is no such path -- remove */
378 if (remove_file_from_cache(path_name))
379 die("git update-index: unable to remove %s",
380 ptr);
381 }
382 else {
383 /* mode ' ' sha1 '\t' name
384 * ptr[-1] points at tab,
385 * ptr[-41] is at the beginning of sha1
386 */
387 ptr[-42] = ptr[-1] = 0;
388 if (add_cacheinfo(mode, sha1, path_name, stage))
389 die("git update-index: unable to update %s",
390 path_name);
391 }
392 continue;
393
394 bad_line:
395 die("malformed index info %s", buf.buf);
396 }
397 strbuf_release(&buf);
398 strbuf_release(&uq);
399}
400
401static const char * const update_index_usage[] = {
402 N_("git update-index [options] [--] [<file>...]"),
403 NULL
404};
405
406static unsigned char head_sha1[20];
407static unsigned char merge_head_sha1[20];
408
409static struct cache_entry *read_one_ent(const char *which,
410 unsigned char *ent, const char *path,
411 int namelen, int stage)
412{
413 unsigned mode;
414 unsigned char sha1[20];
415 int size;
416 struct cache_entry *ce;
417
418 if (get_tree_entry(ent, path, sha1, &mode)) {
419 if (which)
420 error("%s: not in %s branch.", path, which);
421 return NULL;
422 }
423 if (mode == S_IFDIR) {
424 if (which)
425 error("%s: not a blob in %s branch.", path, which);
426 return NULL;
427 }
428 size = cache_entry_size(namelen);
429 ce = xcalloc(1, size);
430
431 hashcpy(ce->sha1, sha1);
432 memcpy(ce->name, path, namelen);
433 ce->ce_flags = create_ce_flags(stage);
434 ce->ce_namelen = namelen;
435 ce->ce_mode = create_ce_mode(mode);
436 return ce;
437}
438
439static int unresolve_one(const char *path)
440{
441 int namelen = strlen(path);
442 int pos;
443 int ret = 0;
444 struct cache_entry *ce_2 = NULL, *ce_3 = NULL;
445
446 /* See if there is such entry in the index. */
447 pos = cache_name_pos(path, namelen);
448 if (0 <= pos) {
449 /* already merged */
450 pos = unmerge_cache_entry_at(pos);
451 if (pos < active_nr) {
452 struct cache_entry *ce = active_cache[pos];
453 if (ce_stage(ce) &&
454 ce_namelen(ce) == namelen &&
455 !memcmp(ce->name, path, namelen))
456 return 0;
457 }
458 /* no resolve-undo information; fall back */
459 } else {
460 /* If there isn't, either it is unmerged, or
461 * resolved as "removed" by mistake. We do not
462 * want to do anything in the former case.
463 */
464 pos = -pos-1;
465 if (pos < active_nr) {
466 struct cache_entry *ce = active_cache[pos];
467 if (ce_namelen(ce) == namelen &&
468 !memcmp(ce->name, path, namelen)) {
469 fprintf(stderr,
470 "%s: skipping still unmerged path.\n",
471 path);
472 goto free_return;
473 }
474 }
475 }
476
477 /* Grab blobs from given path from HEAD and MERGE_HEAD,
478 * stuff HEAD version in stage #2,
479 * stuff MERGE_HEAD version in stage #3.
480 */
481 ce_2 = read_one_ent("our", head_sha1, path, namelen, 2);
482 ce_3 = read_one_ent("their", merge_head_sha1, path, namelen, 3);
483
484 if (!ce_2 || !ce_3) {
485 ret = -1;
486 goto free_return;
487 }
488 if (!hashcmp(ce_2->sha1, ce_3->sha1) &&
489 ce_2->ce_mode == ce_3->ce_mode) {
490 fprintf(stderr, "%s: identical in both, skipping.\n",
491 path);
492 goto free_return;
493 }
494
495 remove_file_from_cache(path);
496 if (add_cache_entry(ce_2, ADD_CACHE_OK_TO_ADD)) {
497 error("%s: cannot add our version to the index.", path);
498 ret = -1;
499 goto free_return;
500 }
501 if (!add_cache_entry(ce_3, ADD_CACHE_OK_TO_ADD))
502 return 0;
503 error("%s: cannot add their version to the index.", path);
504 ret = -1;
505 free_return:
506 free(ce_2);
507 free(ce_3);
508 return ret;
509}
510
511static void read_head_pointers(void)
512{
513 if (read_ref("HEAD", head_sha1))
514 die("No HEAD -- no initial commit yet?");
515 if (read_ref("MERGE_HEAD", merge_head_sha1)) {
516 fprintf(stderr, "Not in the middle of a merge.\n");
517 exit(0);
518 }
519}
520
521static int do_unresolve(int ac, const char **av,
522 const char *prefix, int prefix_length)
523{
524 int i;
525 int err = 0;
526
527 /* Read HEAD and MERGE_HEAD; if MERGE_HEAD does not exist, we
528 * are not doing a merge, so exit with success status.
529 */
530 read_head_pointers();
531
532 for (i = 1; i < ac; i++) {
533 const char *arg = av[i];
534 const char *p = prefix_path(prefix, prefix_length, arg);
535 err |= unresolve_one(p);
536 if (p < arg || p > arg + strlen(arg))
537 free((char *)p);
538 }
539 return err;
540}
541
542static int do_reupdate(int ac, const char **av,
543 const char *prefix, int prefix_length)
544{
545 /* Read HEAD and run update-index on paths that are
546 * merged and already different between index and HEAD.
547 */
548 int pos;
549 int has_head = 1;
550 const char **paths = get_pathspec(prefix, av + 1);
551 struct pathspec pathspec;
552
553 init_pathspec(&pathspec, paths);
554
555 if (read_ref("HEAD", head_sha1))
556 /* If there is no HEAD, that means it is an initial
557 * commit. Update everything in the index.
558 */
559 has_head = 0;
560 redo:
561 for (pos = 0; pos < active_nr; pos++) {
562 struct cache_entry *ce = active_cache[pos];
563 struct cache_entry *old = NULL;
564 int save_nr;
565
566 if (ce_stage(ce) || !ce_path_match(ce, &pathspec))
567 continue;
568 if (has_head)
569 old = read_one_ent(NULL, head_sha1,
570 ce->name, ce_namelen(ce), 0);
571 if (old && ce->ce_mode == old->ce_mode &&
572 !hashcmp(ce->sha1, old->sha1)) {
573 free(old);
574 continue; /* unchanged */
575 }
576 /* Be careful. The working tree may not have the
577 * path anymore, in which case, under 'allow_remove',
578 * or worse yet 'allow_replace', active_nr may decrease.
579 */
580 save_nr = active_nr;
581 update_one(ce->name + prefix_length, prefix, prefix_length);
582 if (save_nr != active_nr)
583 goto redo;
584 }
585 free_pathspec(&pathspec);
586 return 0;
587}
588
589struct refresh_params {
590 unsigned int flags;
591 int *has_errors;
592};
593
594static int refresh(struct refresh_params *o, unsigned int flag)
595{
596 setup_work_tree();
597 read_cache_preload(NULL);
598 *o->has_errors |= refresh_cache(o->flags | flag);
599 return 0;
600}
601
602static int refresh_callback(const struct option *opt,
603 const char *arg, int unset)
604{
605 return refresh(opt->value, 0);
606}
607
608static int really_refresh_callback(const struct option *opt,
609 const char *arg, int unset)
610{
611 return refresh(opt->value, REFRESH_REALLY);
612}
613
614static int chmod_callback(const struct option *opt,
615 const char *arg, int unset)
616{
617 char *flip = opt->value;
618 if ((arg[0] != '-' && arg[0] != '+') || arg[1] != 'x' || arg[2])
619 return error("option 'chmod' expects \"+x\" or \"-x\"");
620 *flip = arg[0];
621 return 0;
622}
623
624static int resolve_undo_clear_callback(const struct option *opt,
625 const char *arg, int unset)
626{
627 resolve_undo_clear();
628 return 0;
629}
630
631static int cacheinfo_callback(struct parse_opt_ctx_t *ctx,
632 const struct option *opt, int unset)
633{
634 unsigned char sha1[20];
635 unsigned int mode;
636
637 if (ctx->argc <= 3)
638 return error("option 'cacheinfo' expects three arguments");
639 if (strtoul_ui(*++ctx->argv, 8, &mode) ||
640 get_sha1_hex(*++ctx->argv, sha1) ||
641 add_cacheinfo(mode, sha1, *++ctx->argv, 0))
642 die("git update-index: --cacheinfo cannot add %s", *ctx->argv);
643 ctx->argc -= 3;
644 return 0;
645}
646
647static int stdin_cacheinfo_callback(struct parse_opt_ctx_t *ctx,
648 const struct option *opt, int unset)
649{
650 int *line_termination = opt->value;
651
652 if (ctx->argc != 1)
653 return error("option '%s' must be the last argument", opt->long_name);
654 allow_add = allow_replace = allow_remove = 1;
655 read_index_info(*line_termination);
656 return 0;
657}
658
659static int stdin_callback(struct parse_opt_ctx_t *ctx,
660 const struct option *opt, int unset)
661{
662 int *read_from_stdin = opt->value;
663
664 if (ctx->argc != 1)
665 return error("option '%s' must be the last argument", opt->long_name);
666 *read_from_stdin = 1;
667 return 0;
668}
669
670static int unresolve_callback(struct parse_opt_ctx_t *ctx,
671 const struct option *opt, int flags)
672{
673 int *has_errors = opt->value;
674 const char *prefix = startup_info->prefix;
675
676 /* consume remaining arguments. */
677 *has_errors = do_unresolve(ctx->argc, ctx->argv,
678 prefix, prefix ? strlen(prefix) : 0);
679 if (*has_errors)
680 active_cache_changed = 0;
681
682 ctx->argv += ctx->argc - 1;
683 ctx->argc = 1;
684 return 0;
685}
686
687static int reupdate_callback(struct parse_opt_ctx_t *ctx,
688 const struct option *opt, int flags)
689{
690 int *has_errors = opt->value;
691 const char *prefix = startup_info->prefix;
692
693 /* consume remaining arguments. */
694 setup_work_tree();
695 *has_errors = do_reupdate(ctx->argc, ctx->argv,
696 prefix, prefix ? strlen(prefix) : 0);
697 if (*has_errors)
698 active_cache_changed = 0;
699
700 ctx->argv += ctx->argc - 1;
701 ctx->argc = 1;
702 return 0;
703}
704
705int cmd_update_index(int argc, const char **argv, const char *prefix)
706{
707 int newfd, entries, has_errors = 0, line_termination = '\n';
708 int read_from_stdin = 0;
709 int prefix_length = prefix ? strlen(prefix) : 0;
710 int preferred_index_format = 0;
711 char set_executable_bit = 0;
712 struct refresh_params refresh_args = {0, &has_errors};
713 int lock_error = 0;
714 struct lock_file *lock_file;
715 struct parse_opt_ctx_t ctx;
716 int parseopt_state = PARSE_OPT_UNKNOWN;
717 struct option options[] = {
718 OPT_BIT('q', NULL, &refresh_args.flags,
719 N_("continue refresh even when index needs update"),
720 REFRESH_QUIET),
721 OPT_BIT(0, "ignore-submodules", &refresh_args.flags,
722 N_("refresh: ignore submodules"),
723 REFRESH_IGNORE_SUBMODULES),
724 OPT_SET_INT(0, "add", &allow_add,
725 N_("do not ignore new files"), 1),
726 OPT_SET_INT(0, "replace", &allow_replace,
727 N_("let files replace directories and vice-versa"), 1),
728 OPT_SET_INT(0, "remove", &allow_remove,
729 N_("notice files missing from worktree"), 1),
730 OPT_BIT(0, "unmerged", &refresh_args.flags,
731 N_("refresh even if index contains unmerged entries"),
732 REFRESH_UNMERGED),
733 {OPTION_CALLBACK, 0, "refresh", &refresh_args, NULL,
734 N_("refresh stat information"),
735 PARSE_OPT_NOARG | PARSE_OPT_NONEG,
736 refresh_callback},
737 {OPTION_CALLBACK, 0, "really-refresh", &refresh_args, NULL,
738 N_("like --refresh, but ignore assume-unchanged setting"),
739 PARSE_OPT_NOARG | PARSE_OPT_NONEG,
740 really_refresh_callback},
741 {OPTION_LOWLEVEL_CALLBACK, 0, "cacheinfo", NULL,
742 N_("<mode> <object> <path>"),
743 N_("add the specified entry to the index"),
744 PARSE_OPT_NOARG | /* disallow --cacheinfo=<mode> form */
745 PARSE_OPT_NONEG | PARSE_OPT_LITERAL_ARGHELP,
746 (parse_opt_cb *) cacheinfo_callback},
747 {OPTION_CALLBACK, 0, "chmod", &set_executable_bit, N_("(+/-)x"),
748 N_("override the executable bit of the listed files"),
749 PARSE_OPT_NONEG | PARSE_OPT_LITERAL_ARGHELP,
750 chmod_callback},
751 {OPTION_SET_INT, 0, "assume-unchanged", &mark_valid_only, NULL,
752 N_("mark files as \"not changing\""),
753 PARSE_OPT_NOARG | PARSE_OPT_NONEG, NULL, MARK_FLAG},
754 {OPTION_SET_INT, 0, "no-assume-unchanged", &mark_valid_only, NULL,
755 N_("clear assumed-unchanged bit"),
756 PARSE_OPT_NOARG | PARSE_OPT_NONEG, NULL, UNMARK_FLAG},
757 {OPTION_SET_INT, 0, "skip-worktree", &mark_skip_worktree_only, NULL,
758 N_("mark files as \"index-only\""),
759 PARSE_OPT_NOARG | PARSE_OPT_NONEG, NULL, MARK_FLAG},
760 {OPTION_SET_INT, 0, "no-skip-worktree", &mark_skip_worktree_only, NULL,
761 N_("clear skip-worktree bit"),
762 PARSE_OPT_NOARG | PARSE_OPT_NONEG, NULL, UNMARK_FLAG},
763 OPT_SET_INT(0, "info-only", &info_only,
764 N_("add to index only; do not add content to object database"), 1),
765 OPT_SET_INT(0, "force-remove", &force_remove,
766 N_("remove named paths even if present in worktree"), 1),
767 OPT_SET_INT('z', NULL, &line_termination,
768 N_("with --stdin: input lines are terminated by null bytes"), '\0'),
769 {OPTION_LOWLEVEL_CALLBACK, 0, "stdin", &read_from_stdin, NULL,
770 N_("read list of paths to be updated from standard input"),
771 PARSE_OPT_NONEG | PARSE_OPT_NOARG,
772 (parse_opt_cb *) stdin_callback},
773 {OPTION_LOWLEVEL_CALLBACK, 0, "index-info", &line_termination, NULL,
774 N_("add entries from standard input to the index"),
775 PARSE_OPT_NONEG | PARSE_OPT_NOARG,
776 (parse_opt_cb *) stdin_cacheinfo_callback},
777 {OPTION_LOWLEVEL_CALLBACK, 0, "unresolve", &has_errors, NULL,
778 N_("repopulate stages #2 and #3 for the listed paths"),
779 PARSE_OPT_NONEG | PARSE_OPT_NOARG,
780 (parse_opt_cb *) unresolve_callback},
781 {OPTION_LOWLEVEL_CALLBACK, 'g', "again", &has_errors, NULL,
782 N_("only update entries that differ from HEAD"),
783 PARSE_OPT_NONEG | PARSE_OPT_NOARG,
784 (parse_opt_cb *) reupdate_callback},
785 OPT_BIT(0, "ignore-missing", &refresh_args.flags,
786 N_("ignore files missing from worktree"),
787 REFRESH_IGNORE_MISSING),
788 OPT_SET_INT(0, "verbose", &verbose,
789 N_("report actions to standard output"), 1),
790 {OPTION_CALLBACK, 0, "clear-resolve-undo", NULL, NULL,
791 N_("(for porcelains) forget saved unresolved conflicts"),
792 PARSE_OPT_NOARG | PARSE_OPT_NONEG,
793 resolve_undo_clear_callback},
794 OPT_INTEGER(0, "index-version", &preferred_index_format,
795 N_("write index in this format")),
796 OPT_END()
797 };
798
799 if (argc == 2 && !strcmp(argv[1], "-h"))
800 usage_with_options(update_index_usage, options);
801
802 git_config(git_default_config, NULL);
803
804 /* We can't free this memory, it becomes part of a linked list parsed atexit() */
805 lock_file = xcalloc(1, sizeof(struct lock_file));
806
807 newfd = hold_locked_index(lock_file, 0);
808 if (newfd < 0)
809 lock_error = errno;
810
811 entries = read_cache();
812 if (entries < 0)
813 die("cache corrupted");
814
815 /*
816 * Custom copy of parse_options() because we want to handle
817 * filename arguments as they come.
818 */
819 parse_options_start(&ctx, argc, argv, prefix,
820 options, PARSE_OPT_STOP_AT_NON_OPTION);
821 while (ctx.argc) {
822 if (parseopt_state != PARSE_OPT_DONE)
823 parseopt_state = parse_options_step(&ctx, options,
824 update_index_usage);
825 if (!ctx.argc)
826 break;
827 switch (parseopt_state) {
828 case PARSE_OPT_HELP:
829 exit(129);
830 case PARSE_OPT_NON_OPTION:
831 case PARSE_OPT_DONE:
832 {
833 const char *path = ctx.argv[0];
834 const char *p;
835
836 setup_work_tree();
837 p = prefix_path(prefix, prefix_length, path);
838 update_one(p, NULL, 0);
839 if (set_executable_bit)
840 chmod_path(set_executable_bit, p);
841 if (p < path || p > path + strlen(path))
842 free((char *)p);
843 ctx.argc--;
844 ctx.argv++;
845 break;
846 }
847 case PARSE_OPT_UNKNOWN:
848 if (ctx.argv[0][1] == '-')
849 error("unknown option '%s'", ctx.argv[0] + 2);
850 else
851 error("unknown switch '%c'", *ctx.opt);
852 usage_with_options(update_index_usage, options);
853 }
854 }
855 argc = parse_options_end(&ctx);
856 if (preferred_index_format) {
857 if (preferred_index_format < INDEX_FORMAT_LB ||
858 INDEX_FORMAT_UB < preferred_index_format)
859 die("index-version %d not in range: %d..%d",
860 preferred_index_format,
861 INDEX_FORMAT_LB, INDEX_FORMAT_UB);
862
863 if (the_index.version != preferred_index_format)
864 active_cache_changed = 1;
865 the_index.version = preferred_index_format;
866 }
867
868 if (read_from_stdin) {
869 struct strbuf buf = STRBUF_INIT, nbuf = STRBUF_INIT;
870
871 setup_work_tree();
872 while (strbuf_getline(&buf, stdin, line_termination) != EOF) {
873 const char *p;
874 if (line_termination && buf.buf[0] == '"') {
875 strbuf_reset(&nbuf);
876 if (unquote_c_style(&nbuf, buf.buf, NULL))
877 die("line is badly quoted");
878 strbuf_swap(&buf, &nbuf);
879 }
880 p = prefix_path(prefix, prefix_length, buf.buf);
881 update_one(p, NULL, 0);
882 if (set_executable_bit)
883 chmod_path(set_executable_bit, p);
884 if (p < buf.buf || p > buf.buf + buf.len)
885 free((char *)p);
886 }
887 strbuf_release(&nbuf);
888 strbuf_release(&buf);
889 }
890
891 if (active_cache_changed) {
892 if (newfd < 0) {
893 if (refresh_args.flags & REFRESH_QUIET)
894 exit(128);
895 unable_to_lock_index_die(get_index_file(), lock_error);
896 }
897 if (write_cache(newfd, active_cache, active_nr) ||
898 commit_locked_index(lock_file))
899 die("Unable to write new index file");
900 }
901
902 rollback_lock_file(lock_file);
903
904 return has_errors ? 1 : 0;
905}