2 * GIT - The information manager from hell
4 * Copyright (C) Linus Torvalds, 2005
11 * Default to not allowing changes to the list of files. The
12 * tool doesn't actually care, but this makes it harder to add
13 * files to the revision control by mistake by doing something
14 * like "git-update-index *" and suddenly having all the object
15 * files be revision controlled.
18 static int allow_remove;
19 static int allow_replace;
20 static int allow_unmerged; /* --refresh needing merge is not error */
21 static int not_new; /* --refresh not having working tree files is not error */
22 static int quiet; /* --refresh needing update is not error */
24 static int force_remove;
26 static int mark_valid_only = 0;
28 #define UNMARK_VALID 2
31 /* Three functions to allow overloaded pointer return; see linux/err.h */
32 static inline void *ERR_PTR(long error)
34 return (void *) error;
37 static inline long PTR_ERR(const void *ptr)
42 static inline long IS_ERR(const void *ptr)
44 return (unsigned long)ptr > (unsigned long)-1000L;
47 static void report(const char *fmt, ...)
60 static int mark_valid(const char *path)
62 int namelen = strlen(path);
63 int pos = cache_name_pos(path, namelen);
65 switch (mark_valid_only) {
67 active_cache[pos]->ce_flags |= htons(CE_VALID);
70 active_cache[pos]->ce_flags &= ~htons(CE_VALID);
73 active_cache_changed = 1;
79 static int add_file_to_cache(const char *path)
81 int size, namelen, option, status;
82 struct cache_entry *ce;
85 status = lstat(path, &st);
86 if (status < 0 || S_ISDIR(st.st_mode)) {
87 /* When we used to have "path" and now we want to add
88 * "path/file", we need a way to remove "path" before
89 * being able to add "path/file". However,
90 * "git-update-index --remove path" would not work.
91 * --force-remove can be used but this is more user
92 * friendly, especially since we can do the opposite
93 * case just fine without --force-remove.
95 if (status == 0 || (errno == ENOENT || errno == ENOTDIR)) {
97 if (remove_file_from_cache(path))
98 return error("%s: cannot remove from the index",
102 } else if (status < 0) {
103 return error("%s: does not exist and --remove not passed",
108 return error("%s: is a directory - add files inside instead",
111 return error("lstat(\"%s\"): %s", path,
115 namelen = strlen(path);
116 size = cache_entry_size(namelen);
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);
167 if (ce_modified(ce, &st, really))
168 return ERR_PTR(-EINVAL);
171 updated = xmalloc(size);
172 memcpy(updated, ce, size);
173 fill_stat_cache_info(updated, &st);
178 static int refresh_cache(int really)
183 for (i = 0; i < active_nr; i++) {
184 struct cache_entry *ce, *new;
185 ce = active_cache[i];
187 while ((i < active_nr) &&
188 ! strcmp(active_cache[i]->name, ce->name))
193 printf("%s: needs merge\n", ce->name);
198 new = refresh_entry(ce, really);
202 if (not_new && PTR_ERR(new) == -ENOENT)
204 if (really && PTR_ERR(new) == -EINVAL) {
205 /* If we are doing --really-refresh that
206 * means the index is not valid anymore.
208 ce->ce_flags &= ~htons(CE_VALID);
209 active_cache_changed = 1;
213 printf("%s: needs update\n", ce->name);
217 active_cache_changed = 1;
218 /* You can NOT just free active_cache[i] here, since it
219 * might not be necessarily malloc()ed but can also come
221 active_cache[i] = new;
227 * We fundamentally don't like some paths: we don't want
228 * dot or dot-dot anywhere, and for obvious reasons don't
229 * want to recurse into ".git" either.
231 * Also, we don't want double slashes or slashes at the
232 * end that can make pathnames ambiguous.
234 static int verify_dotfile(const char *rest)
237 * The first character was '.', but that
238 * has already been discarded, we now test
242 /* "." is not allowed */
247 * ".git" followed by NUL or slash is bad. This
248 * shares the path end test with the ".." case.
258 if (rest[1] == '\0' || rest[1] == '/')
264 static int verify_path(const char *path)
281 if (verify_dotfile(path))
290 static int add_cacheinfo(unsigned int mode, const unsigned char *sha1,
291 const char *path, int stage)
293 int size, len, option;
294 struct cache_entry *ce;
296 if (!verify_path(path))
300 size = cache_entry_size(len);
304 memcpy(ce->sha1, sha1, 20);
305 memcpy(ce->name, path, len);
306 ce->ce_flags = create_ce_flags(len, stage);
307 ce->ce_mode = create_ce_mode(mode);
308 if (assume_unchanged)
309 ce->ce_flags |= htons(CE_VALID);
310 option = allow_add ? ADD_CACHE_OK_TO_ADD : 0;
311 option |= allow_replace ? ADD_CACHE_OK_TO_REPLACE : 0;
312 if (add_cache_entry(ce, option))
313 return error("%s: cannot add to the index - missing --add option?",
315 report("add '%s'", path);
319 static int chmod_path(int flip, const char *path)
322 struct cache_entry *ce;
325 pos = cache_name_pos(path, strlen(path));
328 ce = active_cache[pos];
329 mode = ntohl(ce->ce_mode);
334 ce->ce_mode |= htonl(0111); break;
336 ce->ce_mode &= htonl(~0111); break;
340 active_cache_changed = 1;
344 static struct cache_file cache_file;
346 static void update_one(const char *path, const char *prefix, int prefix_length)
348 const char *p = prefix_path(prefix, prefix_length, path);
349 if (!verify_path(p)) {
350 fprintf(stderr, "Ignoring path %s\n", path);
353 if (mark_valid_only) {
355 die("Unable to mark file %s", path);
360 if (remove_file_from_cache(p))
361 die("git-update-index: unable to remove %s", path);
362 report("remove '%s'", path);
365 if (add_file_to_cache(p))
366 die("Unable to process file %s", path);
367 report("add '%s'", path);
370 static void read_index_info(int line_termination)
377 unsigned char sha1[20];
381 /* This reads lines formatted in one of three formats:
383 * (1) mode SP sha1 TAB path
384 * The first format is what "git-apply --index-info"
385 * reports, and used to reconstruct a partial tree
386 * that is used for phony merge base tree when falling
387 * back on 3-way merge.
389 * (2) mode SP type SP sha1 TAB path
390 * The second format is to stuff git-ls-tree output
391 * into the index file.
393 * (3) mode SP sha1 SP stage TAB path
394 * This format is to put higher order stages into the
395 * index file and matches git-ls-files --stage output.
397 read_line(&buf, stdin, line_termination);
401 mode = strtoul(buf.buf, &ptr, 8);
402 if (ptr == buf.buf || *ptr != ' ')
405 tab = strchr(ptr, '\t');
406 if (!tab || tab - ptr < 41)
409 if (tab[-2] == ' ' && '0' <= tab[-1] && tab[-1] <= '3') {
410 stage = tab[-1] - '0';
411 ptr = tab + 1; /* point at the head of path */
412 tab = tab - 2; /* point at tail of sha1 */
416 ptr = tab + 1; /* point at the head of path */
419 if (get_sha1_hex(tab - 40, sha1) || tab[-41] != ' ')
422 if (line_termination && ptr[0] == '"')
423 path_name = unquote_c_style(ptr, NULL);
427 if (!verify_path(path_name)) {
428 fprintf(stderr, "Ignoring path %s\n", path_name);
429 if (path_name != ptr)
435 /* mode == 0 means there is no such path -- remove */
436 if (remove_file_from_cache(path_name))
437 die("git-update-index: unable to remove %s",
441 /* mode ' ' sha1 '\t' name
442 * ptr[-1] points at tab,
443 * ptr[-41] is at the beginning of sha1
445 ptr[-42] = ptr[-1] = 0;
446 if (add_cacheinfo(mode, sha1, path_name, stage))
447 die("git-update-index: unable to update %s",
450 if (path_name != ptr)
455 die("malformed index info %s", buf.buf);
459 static const char update_index_usage[] =
460 "git-update-index [-q] [--add] [--replace] [--remove] [--unmerged] [--refresh] [--cacheinfo] [--chmod=(+|-)x] [--info-only] [--force-remove] [--stdin] [--index-info] [--ignore-missing] [-z] [--verbose] [--] <file>...";
462 int main(int argc, const char **argv)
464 int i, newfd, entries, has_errors = 0, line_termination = '\n';
465 int allow_options = 1;
466 int read_from_stdin = 0;
467 const char *prefix = setup_git_directory();
468 int prefix_length = prefix ? strlen(prefix) : 0;
470 git_config(git_default_config);
472 newfd = hold_index_file_for_update(&cache_file, get_index_file());
474 die("unable to create new cachefile");
476 entries = read_cache();
478 die("cache corrupted");
480 for (i = 1 ; i < argc; i++) {
481 const char *path = argv[i];
483 if (allow_options && *path == '-') {
484 if (!strcmp(path, "--")) {
488 if (!strcmp(path, "-q")) {
492 if (!strcmp(path, "--add")) {
496 if (!strcmp(path, "--replace")) {
500 if (!strcmp(path, "--remove")) {
504 if (!strcmp(path, "--unmerged")) {
508 if (!strcmp(path, "--refresh")) {
509 has_errors |= refresh_cache(0);
512 if (!strcmp(path, "--really-refresh")) {
513 has_errors |= refresh_cache(1);
516 if (!strcmp(path, "--cacheinfo")) {
517 unsigned char sha1[20];
521 die("git-update-index: --cacheinfo <mode> <sha1> <path>");
523 if ((sscanf(argv[i+1], "%o", &mode) != 1) ||
524 get_sha1_hex(argv[i+2], sha1) ||
525 add_cacheinfo(mode, sha1, argv[i+3], 0))
526 die("git-update-index: --cacheinfo"
527 " cannot add %s", argv[i+3]);
531 if (!strcmp(path, "--chmod=-x") ||
532 !strcmp(path, "--chmod=+x")) {
534 die("git-update-index: %s <path>", path);
535 if (chmod_path(path[8], argv[++i]))
536 die("git-update-index: %s cannot chmod %s", path, argv[i]);
539 if (!strcmp(path, "--assume-unchanged")) {
540 mark_valid_only = MARK_VALID;
543 if (!strcmp(path, "--no-assume-unchanged")) {
544 mark_valid_only = UNMARK_VALID;
547 if (!strcmp(path, "--info-only")) {
551 if (!strcmp(path, "--force-remove")) {
555 if (!strcmp(path, "-z")) {
556 line_termination = 0;
559 if (!strcmp(path, "--stdin")) {
561 die("--stdin must be at the end");
565 if (!strcmp(path, "--index-info")) {
566 allow_add = allow_replace = allow_remove = 1;
567 read_index_info(line_termination);
570 if (!strcmp(path, "--ignore-missing")) {
574 if (!strcmp(path, "--verbose")) {
578 if (!strcmp(path, "-h") || !strcmp(path, "--help"))
579 usage(update_index_usage);
580 die("unknown option %s", path);
582 update_one(path, prefix, prefix_length);
584 if (read_from_stdin) {
589 read_line(&buf, stdin, line_termination);
592 if (line_termination && buf.buf[0] == '"')
593 path_name = unquote_c_style(buf.buf, NULL);
596 update_one(path_name, prefix, prefix_length);
597 if (path_name != buf.buf)
601 if (active_cache_changed) {
602 if (write_cache(newfd, active_cache, active_nr) ||
603 commit_index_file(&cache_file))
604 die("Unable to write new cachefile");
607 return has_errors ? 1 : 0;