2 * GIT - The information manager from hell
4 * Copyright (C) Linus Torvalds, 2005
10 * Default to not allowing changes to the list of files. The
11 * tool doesn't actually care, but this makes it harder to add
12 * files to the revision control by mistake by doing something
13 * like "git-update-index *" and suddenly having all the object
14 * files be revision controlled.
16 static int allow_add = 0, allow_remove = 0, allow_replace = 0, allow_unmerged = 0, not_new = 0, quiet = 0, info_only = 0;
17 static int force_remove;
19 /* Three functions to allow overloaded pointer return; see linux/err.h */
20 static inline void *ERR_PTR(long error)
22 return (void *) error;
25 static inline long PTR_ERR(const void *ptr)
30 static inline long IS_ERR(const void *ptr)
32 return (unsigned long)ptr > (unsigned long)-1000L;
35 static int add_file_to_cache(const char *path)
37 int size, namelen, option, status;
38 struct cache_entry *ce;
43 status = lstat(path, &st);
44 if (status < 0 || S_ISDIR(st.st_mode)) {
45 /* When we used to have "path" and now we want to add
46 * "path/file", we need a way to remove "path" before
47 * being able to add "path/file". However,
48 * "git-update-index --remove path" would not work.
49 * --force-remove can be used but this is more user
50 * friendly, especially since we can do the opposite
51 * case just fine without --force-remove.
53 if (status == 0 || (errno == ENOENT || errno == ENOTDIR)) {
55 if (remove_file_from_cache(path))
56 return error("%s: cannot remove from the index",
60 } else if (status < 0) {
61 return error("%s: does not exist and --remove not passed",
66 return error("%s: is a directory - add files inside instead",
69 return error("lstat(\"%s\"): %s", path,
72 namelen = strlen(path);
73 size = cache_entry_size(namelen);
76 memcpy(ce->name, path, namelen);
77 fill_stat_cache_info(ce, &st);
78 ce->ce_mode = create_ce_mode(st.st_mode);
79 ce->ce_flags = htons(namelen);
80 switch (st.st_mode & S_IFMT) {
82 fd = open(path, O_RDONLY);
84 return error("open(\"%s\"): %s", path, strerror(errno));
85 if (index_fd(ce->sha1, fd, &st, !info_only, NULL) < 0)
86 return error("%s: failed to insert into database", path);
89 target = xmalloc(st.st_size+1);
90 if (readlink(path, target, st.st_size+1) != st.st_size) {
91 char *errstr = strerror(errno);
93 return error("readlink(\"%s\"): %s", path,
97 unsigned char hdr[50];
99 write_sha1_file_prepare(target, st.st_size, "blob",
100 ce->sha1, hdr, &hdrlen);
101 } else if (write_sha1_file(target, st.st_size, "blob", ce->sha1))
102 return error("%s: failed to insert into database", path);
106 return error("%s: unsupported file type", path);
108 option = allow_add ? ADD_CACHE_OK_TO_ADD : 0;
109 option |= allow_replace ? ADD_CACHE_OK_TO_REPLACE : 0;
110 if (add_cache_entry(ce, option))
111 return error("%s: cannot add to the index - missing --add option?",
117 * "refresh" does not calculate a new sha1 file or bring the
118 * cache up-to-date for mode/content changes. But what it
119 * _does_ do is to "re-match" the stat information of a file
120 * with the cache, so that you can refresh the cache for a
121 * file that hasn't been changed but where the stat entry is
124 * For example, you'd want to do this after doing a "git-read-tree",
125 * to link up the stat cache details with the proper files.
127 static struct cache_entry *refresh_entry(struct cache_entry *ce)
130 struct cache_entry *updated;
133 if (lstat(ce->name, &st) < 0)
134 return ERR_PTR(-errno);
136 changed = ce_match_stat(ce, &st);
140 if (ce_modified(ce, &st))
141 return ERR_PTR(-EINVAL);
144 updated = xmalloc(size);
145 memcpy(updated, ce, size);
146 fill_stat_cache_info(updated, &st);
150 static int refresh_cache(void)
155 for (i = 0; i < active_nr; i++) {
156 struct cache_entry *ce, *new;
157 ce = active_cache[i];
159 while ((i < active_nr) &&
160 ! strcmp(active_cache[i]->name, ce->name))
165 printf("%s: needs merge\n", ce->name);
170 new = refresh_entry(ce);
174 if (not_new && PTR_ERR(new) == -ENOENT)
178 printf("%s: needs update\n", ce->name);
182 active_cache_changed = 1;
183 /* You can NOT just free active_cache[i] here, since it
184 * might not be necessarily malloc()ed but can also come
186 active_cache[i] = new;
192 * We fundamentally don't like some paths: we don't want
193 * dot or dot-dot anywhere, and for obvious reasons don't
194 * want to recurse into ".git" either.
196 * Also, we don't want double slashes or slashes at the
197 * end that can make pathnames ambiguous.
199 static int verify_dotfile(const char *rest)
202 * The first character was '.', but that
203 * has already been discarded, we now test
207 /* "." is not allowed */
212 * ".git" followed by NUL or slash is bad. This
213 * shares the path end test with the ".." case.
223 if (rest[1] == '\0' || rest[1] == '/')
229 static int verify_path(const char *path)
246 if (verify_dotfile(path))
255 static int add_cacheinfo(const char *arg1, const char *arg2, const char *arg3)
257 int size, len, option;
259 unsigned char sha1[20];
260 struct cache_entry *ce;
262 if (sscanf(arg1, "%o", &mode) != 1)
264 if (get_sha1_hex(arg2, sha1))
266 if (!verify_path(arg3))
270 size = cache_entry_size(len);
274 memcpy(ce->sha1, sha1, 20);
275 memcpy(ce->name, arg3, len);
276 ce->ce_flags = htons(len);
277 ce->ce_mode = create_ce_mode(mode);
278 option = allow_add ? ADD_CACHE_OK_TO_ADD : 0;
279 option |= allow_replace ? ADD_CACHE_OK_TO_REPLACE : 0;
280 return add_cache_entry(ce, option);
283 static struct cache_file cache_file;
286 static void update_one(const char *path, const char *prefix, int prefix_length)
288 const char *p = prefix_path(prefix, prefix_length, path);
289 if (!verify_path(p)) {
290 fprintf(stderr, "Ignoring path %s\n", path);
294 if (remove_file_from_cache(p))
295 die("git-update-index: unable to remove %s", path);
298 if (add_file_to_cache(p))
299 die("Unable to process file %s", path);
302 int main(int argc, const char **argv)
304 int i, newfd, entries, has_errors = 0, line_termination = '\n';
305 int allow_options = 1;
306 int read_from_stdin = 0;
307 const char *prefix = setup_git_directory();
308 int prefix_length = prefix ? strlen(prefix) : 0;
310 newfd = hold_index_file_for_update(&cache_file, get_index_file());
312 die("unable to create new cachefile");
314 entries = read_cache();
316 die("cache corrupted");
318 for (i = 1 ; i < argc; i++) {
319 const char *path = argv[i];
321 if (allow_options && *path == '-') {
322 if (!strcmp(path, "--")) {
326 if (!strcmp(path, "-q")) {
330 if (!strcmp(path, "--add")) {
334 if (!strcmp(path, "--replace")) {
338 if (!strcmp(path, "--remove")) {
342 if (!strcmp(path, "--unmerged")) {
346 if (!strcmp(path, "--refresh")) {
347 has_errors |= refresh_cache();
350 if (!strcmp(path, "--cacheinfo")) {
352 die("git-update-index: --cacheinfo <mode> <sha1> <path>");
353 if (add_cacheinfo(argv[i+1], argv[i+2], argv[i+3]))
354 die("git-update-index: --cacheinfo cannot add %s", argv[i+3]);
358 if (!strcmp(path, "--info-only")) {
362 if (!strcmp(path, "--force-remove")) {
366 if (!strcmp(path, "-z")) {
367 line_termination = 0;
370 if (!strcmp(path, "--stdin")) {
372 die("--stdin must be at the end");
376 if (!strcmp(path, "--ignore-missing")) {
380 die("unknown option %s", path);
382 update_one(path, prefix, prefix_length);
384 if (read_from_stdin) {
388 read_line(&buf, stdin, line_termination);
391 update_one(buf.buf, prefix, prefix_length);
394 if (active_cache_changed) {
395 if (write_cache(newfd, active_cache, active_nr) ||
396 commit_index_file(&cache_file))
397 die("Unable to write new cachefile");
400 return has_errors ? 1 : 0;