2 * GIT - The information manager from hell
4 * Copyright (C) Linus Torvalds, 2005
12 * Default to not allowing changes to the list of files. The
13 * tool doesn't actually care, but this makes it harder to add
14 * files to the revision control by mistake by doing something
15 * like "git-update-index *" and suddenly having all the object
16 * files be revision controlled.
19 static int allow_remove;
20 static int allow_replace;
21 static int allow_unmerged; /* --refresh needing merge is not error */
22 static int not_new; /* --refresh not having working tree files is not error */
23 static int quiet; /* --refresh needing update is not error */
25 static int force_remove;
27 static int mark_valid_only = 0;
29 #define UNMARK_VALID 2
32 /* Three functions to allow overloaded pointer return; see linux/err.h */
33 static inline void *ERR_PTR(long error)
35 return (void *) error;
38 static inline long PTR_ERR(const void *ptr)
43 static inline long IS_ERR(const void *ptr)
45 return (unsigned long)ptr > (unsigned long)-1000L;
48 static void report(const char *fmt, ...)
61 static int mark_valid(const char *path)
63 int namelen = strlen(path);
64 int pos = cache_name_pos(path, namelen);
66 switch (mark_valid_only) {
68 active_cache[pos]->ce_flags |= htons(CE_VALID);
71 active_cache[pos]->ce_flags &= ~htons(CE_VALID);
74 active_cache_changed = 1;
80 static int add_file_to_cache(const char *path)
82 int size, namelen, option, status;
83 struct cache_entry *ce;
86 status = lstat(path, &st);
87 if (status < 0 || S_ISDIR(st.st_mode)) {
88 /* When we used to have "path" and now we want to add
89 * "path/file", we need a way to remove "path" before
90 * being able to add "path/file". However,
91 * "git-update-index --remove path" would not work.
92 * --force-remove can be used but this is more user
93 * friendly, especially since we can do the opposite
94 * case just fine without --force-remove.
96 if (status == 0 || (errno == ENOENT || errno == ENOTDIR)) {
98 if (remove_file_from_cache(path))
99 return error("%s: cannot remove from the index",
103 } else if (status < 0) {
104 return error("%s: does not exist and --remove not passed",
109 return error("%s: is a directory - add files inside instead",
112 return error("lstat(\"%s\"): %s", path,
116 namelen = strlen(path);
117 size = cache_entry_size(namelen);
118 ce = xcalloc(1, size);
119 memcpy(ce->name, path, namelen);
120 ce->ce_flags = htons(namelen);
121 fill_stat_cache_info(ce, &st);
123 ce->ce_mode = create_ce_mode(st.st_mode);
124 if (!trust_executable_bit) {
125 /* If there is an existing entry, pick the mode bits
128 int pos = cache_name_pos(path, namelen);
130 ce->ce_mode = active_cache[pos]->ce_mode;
133 if (index_path(ce->sha1, path, &st, !info_only))
135 option = allow_add ? ADD_CACHE_OK_TO_ADD : 0;
136 option |= allow_replace ? ADD_CACHE_OK_TO_REPLACE : 0;
137 if (add_cache_entry(ce, option))
138 return error("%s: cannot add to the index - missing --add option?",
144 * "refresh" does not calculate a new sha1 file or bring the
145 * cache up-to-date for mode/content changes. But what it
146 * _does_ do is to "re-match" the stat information of a file
147 * with the cache, so that you can refresh the cache for a
148 * file that hasn't been changed but where the stat entry is
151 * For example, you'd want to do this after doing a "git-read-tree",
152 * to link up the stat cache details with the proper files.
154 static struct cache_entry *refresh_entry(struct cache_entry *ce, int really)
157 struct cache_entry *updated;
160 if (lstat(ce->name, &st) < 0)
161 return ERR_PTR(-errno);
163 changed = ce_match_stat(ce, &st, really);
165 if (really && assume_unchanged &&
166 !(ce->ce_flags & htons(CE_VALID)))
167 ; /* mark this one VALID again */
172 if (ce_modified(ce, &st, really))
173 return ERR_PTR(-EINVAL);
176 updated = xmalloc(size);
177 memcpy(updated, ce, size);
178 fill_stat_cache_info(updated, &st);
180 /* In this case, if really is not set, we should leave
181 * CE_VALID bit alone. Otherwise, paths marked with
182 * --no-assume-unchanged (i.e. things to be edited) will
183 * reacquire CE_VALID bit automatically, which is not
184 * really what we want.
186 if (!really && assume_unchanged && !(ce->ce_flags & htons(CE_VALID)))
187 updated->ce_flags &= ~htons(CE_VALID);
192 static int refresh_cache(int really)
197 for (i = 0; i < active_nr; i++) {
198 struct cache_entry *ce, *new;
199 ce = active_cache[i];
201 while ((i < active_nr) &&
202 ! strcmp(active_cache[i]->name, ce->name))
207 printf("%s: needs merge\n", ce->name);
212 new = refresh_entry(ce, really);
216 if (not_new && PTR_ERR(new) == -ENOENT)
218 if (really && PTR_ERR(new) == -EINVAL) {
219 /* If we are doing --really-refresh that
220 * means the index is not valid anymore.
222 ce->ce_flags &= ~htons(CE_VALID);
223 active_cache_changed = 1;
227 printf("%s: needs update\n", ce->name);
231 active_cache_changed = 1;
232 /* You can NOT just free active_cache[i] here, since it
233 * might not be necessarily malloc()ed but can also come
235 active_cache[i] = new;
240 static int add_cacheinfo(unsigned int mode, const unsigned char *sha1,
241 const char *path, int stage)
243 int size, len, option;
244 struct cache_entry *ce;
246 if (!verify_path(path))
250 size = cache_entry_size(len);
251 ce = xcalloc(1, size);
253 memcpy(ce->sha1, sha1, 20);
254 memcpy(ce->name, path, len);
255 ce->ce_flags = create_ce_flags(len, stage);
256 ce->ce_mode = create_ce_mode(mode);
257 if (assume_unchanged)
258 ce->ce_flags |= htons(CE_VALID);
259 option = allow_add ? ADD_CACHE_OK_TO_ADD : 0;
260 option |= allow_replace ? ADD_CACHE_OK_TO_REPLACE : 0;
261 if (add_cache_entry(ce, option))
262 return error("%s: cannot add to the index - missing --add option?",
264 report("add '%s'", path);
268 static void chmod_path(int flip, const char *path)
271 struct cache_entry *ce;
274 pos = cache_name_pos(path, strlen(path));
277 ce = active_cache[pos];
278 mode = ntohl(ce->ce_mode);
283 ce->ce_mode |= htonl(0111); break;
285 ce->ce_mode &= htonl(~0111); break;
289 active_cache_changed = 1;
290 report("chmod %cx '%s'", flip, path);
293 die("git-update-index: cannot chmod %cx '%s'", flip, path);
296 static struct cache_file cache_file;
298 static void update_one(const char *path, const char *prefix, int prefix_length)
300 const char *p = prefix_path(prefix, prefix_length, path);
301 if (!verify_path(p)) {
302 fprintf(stderr, "Ignoring path %s\n", path);
305 if (mark_valid_only) {
307 die("Unable to mark file %s", path);
312 if (remove_file_from_cache(p))
313 die("git-update-index: unable to remove %s", path);
314 report("remove '%s'", path);
317 if (add_file_to_cache(p))
318 die("Unable to process file %s", path);
319 report("add '%s'", path);
321 if (p < path || p > path + strlen(path))
325 static void read_index_info(int line_termination)
332 unsigned char sha1[20];
336 /* This reads lines formatted in one of three formats:
338 * (1) mode SP sha1 TAB path
339 * The first format is what "git-apply --index-info"
340 * reports, and used to reconstruct a partial tree
341 * that is used for phony merge base tree when falling
342 * back on 3-way merge.
344 * (2) mode SP type SP sha1 TAB path
345 * The second format is to stuff git-ls-tree output
346 * into the index file.
348 * (3) mode SP sha1 SP stage TAB path
349 * This format is to put higher order stages into the
350 * index file and matches git-ls-files --stage output.
352 read_line(&buf, stdin, line_termination);
356 mode = strtoul(buf.buf, &ptr, 8);
357 if (ptr == buf.buf || *ptr != ' ')
360 tab = strchr(ptr, '\t');
361 if (!tab || tab - ptr < 41)
364 if (tab[-2] == ' ' && '0' <= tab[-1] && tab[-1] <= '3') {
365 stage = tab[-1] - '0';
366 ptr = tab + 1; /* point at the head of path */
367 tab = tab - 2; /* point at tail of sha1 */
371 ptr = tab + 1; /* point at the head of path */
374 if (get_sha1_hex(tab - 40, sha1) || tab[-41] != ' ')
377 if (line_termination && ptr[0] == '"')
378 path_name = unquote_c_style(ptr, NULL);
382 if (!verify_path(path_name)) {
383 fprintf(stderr, "Ignoring path %s\n", path_name);
384 if (path_name != ptr)
390 /* mode == 0 means there is no such path -- remove */
391 if (remove_file_from_cache(path_name))
392 die("git-update-index: unable to remove %s",
396 /* mode ' ' sha1 '\t' name
397 * ptr[-1] points at tab,
398 * ptr[-41] is at the beginning of sha1
400 ptr[-42] = ptr[-1] = 0;
401 if (add_cacheinfo(mode, sha1, path_name, stage))
402 die("git-update-index: unable to update %s",
405 if (path_name != ptr)
410 die("malformed index info %s", buf.buf);
414 static const char update_index_usage[] =
415 "git-update-index [-q] [--add] [--replace] [--remove] [--unmerged] [--refresh] [--really-refresh] [--cacheinfo] [--chmod=(+|-)x] [--assume-unchanged] [--info-only] [--force-remove] [--stdin] [--index-info] [--unresolve] [--again] [--ignore-missing] [-z] [--verbose] [--] <file>...";
417 static unsigned char head_sha1[20];
418 static unsigned char merge_head_sha1[20];
420 static struct cache_entry *read_one_ent(const char *which,
421 unsigned char *ent, const char *path,
422 int namelen, int stage)
425 unsigned char sha1[20];
427 struct cache_entry *ce;
429 if (get_tree_entry(ent, path, sha1, &mode)) {
431 error("%s: not in %s branch.", path, which);
434 if (mode == S_IFDIR) {
436 error("%s: not a blob in %s branch.", path, which);
439 size = cache_entry_size(namelen);
440 ce = xcalloc(1, size);
442 memcpy(ce->sha1, sha1, 20);
443 memcpy(ce->name, path, namelen);
444 ce->ce_flags = create_ce_flags(namelen, stage);
445 ce->ce_mode = create_ce_mode(mode);
449 static int unresolve_one(const char *path)
451 int namelen = strlen(path);
454 struct cache_entry *ce_2 = NULL, *ce_3 = NULL;
456 /* See if there is such entry in the index. */
457 pos = cache_name_pos(path, namelen);
459 /* If there isn't, either it is unmerged, or
460 * resolved as "removed" by mistake. We do not
461 * want to do anything in the former case.
464 if (pos < active_nr) {
465 struct cache_entry *ce = active_cache[pos];
466 if (ce_namelen(ce) == namelen &&
467 !memcmp(ce->name, path, namelen)) {
469 "%s: skipping still unmerged path.\n",
476 /* Grab blobs from given path from HEAD and MERGE_HEAD,
477 * stuff HEAD version in stage #2,
478 * stuff MERGE_HEAD version in stage #3.
480 ce_2 = read_one_ent("our", head_sha1, path, namelen, 2);
481 ce_3 = read_one_ent("their", merge_head_sha1, path, namelen, 3);
483 if (!ce_2 || !ce_3) {
487 if (!memcmp(ce_2->sha1, ce_3->sha1, 20) &&
488 ce_2->ce_mode == ce_3->ce_mode) {
489 fprintf(stderr, "%s: identical in both, skipping.\n",
494 remove_file_from_cache(path);
495 if (add_cache_entry(ce_2, ADD_CACHE_OK_TO_ADD)) {
496 error("%s: cannot add our version to the index.", path);
500 if (!add_cache_entry(ce_3, ADD_CACHE_OK_TO_ADD))
502 error("%s: cannot add their version to the index.", path);
510 static void read_head_pointers(void)
512 if (read_ref(git_path("HEAD"), head_sha1))
513 die("No HEAD -- no initial commit yet?\n");
514 if (read_ref(git_path("MERGE_HEAD"), merge_head_sha1)) {
515 fprintf(stderr, "Not in the middle of a merge.\n");
520 static int do_unresolve(int ac, const char **av,
521 const char *prefix, int prefix_length)
526 /* Read HEAD and MERGE_HEAD; if MERGE_HEAD does not exist, we
527 * are not doing a merge, so exit with success status.
529 read_head_pointers();
531 for (i = 1; i < ac; i++) {
532 const char *arg = av[i];
533 const char *p = prefix_path(prefix, prefix_length, arg);
534 err |= unresolve_one(p);
535 if (p < arg || p > arg + strlen(arg))
541 static int do_reupdate(int ac, const char **av,
542 const char *prefix, int prefix_length)
544 /* Read HEAD and run update-index on paths that are
545 * merged and already different between index and HEAD.
549 const char **pathspec = get_pathspec(prefix, av + 1);
551 if (read_ref(git_path("HEAD"), head_sha1))
552 /* If there is no HEAD, that means it is an initial
553 * commit. Update everything in the index.
557 for (pos = 0; pos < active_nr; pos++) {
558 struct cache_entry *ce = active_cache[pos];
559 struct cache_entry *old = NULL;
562 if (ce_stage(ce) || !ce_path_match(ce, pathspec))
565 old = read_one_ent(NULL, head_sha1,
566 ce->name, ce_namelen(ce), 0);
567 if (old && ce->ce_mode == old->ce_mode &&
568 !memcmp(ce->sha1, old->sha1, 20)) {
570 continue; /* unchanged */
572 /* Be careful. The working tree may not have the
573 * path anymore, in which case, under 'allow_remove',
574 * or worse yet 'allow_replace', active_nr may decrease.
577 update_one(ce->name + prefix_length, prefix, prefix_length);
578 if (save_nr != active_nr)
584 int main(int argc, const char **argv)
586 int i, newfd, entries, has_errors = 0, line_termination = '\n';
587 int allow_options = 1;
588 int read_from_stdin = 0;
589 const char *prefix = setup_git_directory();
590 int prefix_length = prefix ? strlen(prefix) : 0;
591 char set_executable_bit = 0;
593 git_config(git_default_config);
595 newfd = hold_index_file_for_update(&cache_file, get_index_file());
597 die("unable to create new cachefile");
599 entries = read_cache();
601 die("cache corrupted");
603 for (i = 1 ; i < argc; i++) {
604 const char *path = argv[i];
606 if (allow_options && *path == '-') {
607 if (!strcmp(path, "--")) {
611 if (!strcmp(path, "-q")) {
615 if (!strcmp(path, "--add")) {
619 if (!strcmp(path, "--replace")) {
623 if (!strcmp(path, "--remove")) {
627 if (!strcmp(path, "--unmerged")) {
631 if (!strcmp(path, "--refresh")) {
632 has_errors |= refresh_cache(0);
635 if (!strcmp(path, "--really-refresh")) {
636 has_errors |= refresh_cache(1);
639 if (!strcmp(path, "--cacheinfo")) {
640 unsigned char sha1[20];
644 die("git-update-index: --cacheinfo <mode> <sha1> <path>");
646 if ((sscanf(argv[i+1], "%o", &mode) != 1) ||
647 get_sha1_hex(argv[i+2], sha1) ||
648 add_cacheinfo(mode, sha1, argv[i+3], 0))
649 die("git-update-index: --cacheinfo"
650 " cannot add %s", argv[i+3]);
654 if (!strcmp(path, "--chmod=-x") ||
655 !strcmp(path, "--chmod=+x")) {
657 die("git-update-index: %s <path>", path);
658 set_executable_bit = path[8];
661 if (!strcmp(path, "--assume-unchanged")) {
662 mark_valid_only = MARK_VALID;
665 if (!strcmp(path, "--no-assume-unchanged")) {
666 mark_valid_only = UNMARK_VALID;
669 if (!strcmp(path, "--info-only")) {
673 if (!strcmp(path, "--force-remove")) {
677 if (!strcmp(path, "-z")) {
678 line_termination = 0;
681 if (!strcmp(path, "--stdin")) {
683 die("--stdin must be at the end");
687 if (!strcmp(path, "--index-info")) {
689 die("--index-info must be at the end");
690 allow_add = allow_replace = allow_remove = 1;
691 read_index_info(line_termination);
694 if (!strcmp(path, "--unresolve")) {
695 has_errors = do_unresolve(argc - i, argv + i,
696 prefix, prefix_length);
698 active_cache_changed = 0;
701 if (!strcmp(path, "--again")) {
702 has_errors = do_reupdate(argc - i, argv + i,
703 prefix, prefix_length);
705 active_cache_changed = 0;
708 if (!strcmp(path, "--ignore-missing")) {
712 if (!strcmp(path, "--verbose")) {
716 if (!strcmp(path, "-h") || !strcmp(path, "--help"))
717 usage(update_index_usage);
718 die("unknown option %s", path);
720 update_one(path, prefix, prefix_length);
721 if (set_executable_bit)
722 chmod_path(set_executable_bit, path);
724 if (read_from_stdin) {
730 read_line(&buf, stdin, line_termination);
733 if (line_termination && buf.buf[0] == '"')
734 path_name = unquote_c_style(buf.buf, NULL);
737 p = prefix_path(prefix, prefix_length, path_name);
738 update_one(p, NULL, 0);
739 if (set_executable_bit)
740 chmod_path(set_executable_bit, p);
741 if (p < path_name || p > path_name + strlen(path_name))
743 if (path_name != buf.buf)
749 if (active_cache_changed) {
750 if (write_cache(newfd, active_cache, active_nr) ||
751 commit_index_file(&cache_file))
752 die("Unable to write new cachefile");
755 return has_errors ? 1 : 0;