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Commit | Line | Data |
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8bc9a0c7 LT |
1 | /* |
2 | * GIT - The information manager from hell | |
3 | * | |
4 | * Copyright (C) Linus Torvalds, 2005 | |
5 | */ | |
e83c5163 | 6 | #include "cache.h" |
ee1bec3d | 7 | #include "strbuf.h" |
e83c5163 | 8 | |
121481ab LT |
9 | /* |
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 | |
215a7ad1 | 13 | * like "git-update-index *" and suddenly having all the object |
121481ab LT |
14 | * files be revision controlled. |
15 | */ | |
df6e1516 | 16 | static int allow_add = 0, allow_remove = 0, allow_replace = 0, not_new = 0, quiet = 0, info_only = 0; |
9b63f501 | 17 | static int force_remove; |
c6e007b0 JB |
18 | |
19 | /* Three functions to allow overloaded pointer return; see linux/err.h */ | |
20 | static inline void *ERR_PTR(long error) | |
21 | { | |
22 | return (void *) error; | |
23 | } | |
24 | ||
25 | static inline long PTR_ERR(const void *ptr) | |
26 | { | |
27 | return (long) ptr; | |
28 | } | |
29 | ||
30 | static inline long IS_ERR(const void *ptr) | |
31 | { | |
32 | return (unsigned long)ptr > (unsigned long)-1000L; | |
33 | } | |
121481ab | 34 | |
6b5ee137 | 35 | static int add_file_to_cache(const char *path) |
e83c5163 | 36 | { |
4c5abf42 | 37 | int size, namelen, option, status; |
e83c5163 LT |
38 | struct cache_entry *ce; |
39 | struct stat st; | |
40 | int fd; | |
ffbe1add | 41 | char *target; |
e83c5163 | 42 | |
4c5abf42 JH |
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, | |
215a7ad1 | 48 | * "git-update-index --remove path" would not work. |
4c5abf42 JH |
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. | |
52 | */ | |
53 | if (status == 0 || (errno == ENOENT || errno == ENOTDIR)) { | |
34143b26 PB |
54 | if (allow_remove) { |
55 | if (remove_file_from_cache(path)) | |
56 | return error("%s: cannot remove from the index", | |
57 | path); | |
58 | else | |
59 | return 0; | |
60 | } else if (status < 0) { | |
61 | return error("%s: does not exist and --remove not passed", | |
62 | path); | |
63 | } | |
121481ab | 64 | } |
89bc8c78 | 65 | if (0 == status) |
34143b26 PB |
66 | return error("%s: is a directory - add files inside instead", |
67 | path); | |
89bc8c78 AW |
68 | else |
69 | return error("lstat(\"%s\"): %s", path, | |
70 | strerror(errno)); | |
e83c5163 | 71 | } |
e83c5163 LT |
72 | namelen = strlen(path); |
73 | size = cache_entry_size(namelen); | |
812666c8 | 74 | ce = xmalloc(size); |
e83c5163 LT |
75 | memset(ce, 0, size); |
76 | memcpy(ce->name, path, namelen); | |
711cf3a0 | 77 | fill_stat_cache_info(ce, &st); |
e4479470 | 78 | ce->ce_mode = create_ce_mode(st.st_mode); |
f5cabd13 | 79 | ce->ce_flags = htons(namelen); |
8ae0a8c5 KS |
80 | switch (st.st_mode & S_IFMT) { |
81 | case S_IFREG: | |
82 | fd = open(path, O_RDONLY); | |
83 | if (fd < 0) | |
34143b26 | 84 | return error("open(\"%s\"): %s", path, strerror(errno)); |
df6e1516 | 85 | if (index_fd(ce->sha1, fd, &st, !info_only, NULL) < 0) |
34143b26 | 86 | return error("%s: failed to insert into database", path); |
8ae0a8c5 KS |
87 | break; |
88 | case S_IFLNK: | |
ffbe1add KS |
89 | target = xmalloc(st.st_size+1); |
90 | if (readlink(path, target, st.st_size+1) != st.st_size) { | |
34143b26 | 91 | char *errstr = strerror(errno); |
ffbe1add | 92 | free(target); |
34143b26 PB |
93 | return error("readlink(\"%s\"): %s", path, |
94 | errstr); | |
ffbe1add | 95 | } |
df6e1516 BL |
96 | if (info_only) { |
97 | unsigned char hdr[50]; | |
98 | int hdrlen; | |
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)) | |
34143b26 | 102 | return error("%s: failed to insert into database", path); |
ffbe1add | 103 | free(target); |
8ae0a8c5 KS |
104 | break; |
105 | default: | |
34143b26 | 106 | return error("%s: unsupported file type", path); |
8ae0a8c5 | 107 | } |
192268c1 JH |
108 | option = allow_add ? ADD_CACHE_OK_TO_ADD : 0; |
109 | option |= allow_replace ? ADD_CACHE_OK_TO_REPLACE : 0; | |
34143b26 PB |
110 | if (add_cache_entry(ce, option)) |
111 | return error("%s: cannot add to the index - missing --add option?", | |
112 | path); | |
113 | return 0; | |
121481ab LT |
114 | } |
115 | ||
711cf3a0 LT |
116 | /* |
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 | |
122 | * out of date. | |
123 | * | |
667bb59b | 124 | * For example, you'd want to do this after doing a "git-read-tree", |
711cf3a0 LT |
125 | * to link up the stat cache details with the proper files. |
126 | */ | |
127 | static struct cache_entry *refresh_entry(struct cache_entry *ce) | |
128 | { | |
129 | struct stat st; | |
130 | struct cache_entry *updated; | |
131 | int changed, size; | |
132 | ||
8ae0a8c5 | 133 | if (lstat(ce->name, &st) < 0) |
c6e007b0 | 134 | return ERR_PTR(-errno); |
711cf3a0 | 135 | |
5d728c84 | 136 | changed = ce_match_stat(ce, &st); |
711cf3a0 LT |
137 | if (!changed) |
138 | return ce; | |
139 | ||
b0391890 | 140 | if (ce_modified(ce, &st)) |
c6e007b0 | 141 | return ERR_PTR(-EINVAL); |
711cf3a0 LT |
142 | |
143 | size = ce_size(ce); | |
812666c8 | 144 | updated = xmalloc(size); |
711cf3a0 LT |
145 | memcpy(updated, ce, size); |
146 | fill_stat_cache_info(updated, &st); | |
147 | return updated; | |
121481ab LT |
148 | } |
149 | ||
90535218 | 150 | static int refresh_cache(void) |
121481ab LT |
151 | { |
152 | int i; | |
90535218 | 153 | int has_errors = 0; |
121481ab | 154 | |
711cf3a0 | 155 | for (i = 0; i < active_nr; i++) { |
1bc992ac JH |
156 | struct cache_entry *ce, *new; |
157 | ce = active_cache[i]; | |
158 | if (ce_stage(ce)) { | |
159 | printf("%s: needs merge\n", ce->name); | |
90535218 | 160 | has_errors = 1; |
1bc992ac JH |
161 | while ((i < active_nr) && |
162 | ! strcmp(active_cache[i]->name, ce->name)) | |
163 | i++; | |
164 | i--; | |
165 | continue; | |
166 | } | |
711cf3a0 | 167 | |
1bc992ac | 168 | new = refresh_entry(ce); |
c6e007b0 | 169 | if (IS_ERR(new)) { |
0ed3715f LT |
170 | if (not_new && PTR_ERR(new) == -ENOENT) |
171 | continue; | |
172 | if (quiet) | |
173 | continue; | |
174 | printf("%s: needs update\n", ce->name); | |
175 | has_errors = 1; | |
711cf3a0 LT |
176 | continue; |
177 | } | |
ee267527 | 178 | active_cache_changed = 1; |
62d046a0 PB |
179 | /* You can NOT just free active_cache[i] here, since it |
180 | * might not be necessarily malloc()ed but can also come | |
181 | * from mmap(). */ | |
711cf3a0 LT |
182 | active_cache[i] = new; |
183 | } | |
90535218 | 184 | return has_errors; |
e83c5163 LT |
185 | } |
186 | ||
e83c5163 LT |
187 | /* |
188 | * We fundamentally don't like some paths: we don't want | |
320d3a1b LT |
189 | * dot or dot-dot anywhere, and for obvious reasons don't |
190 | * want to recurse into ".git" either. | |
e83c5163 LT |
191 | * |
192 | * Also, we don't want double slashes or slashes at the | |
aebb2679 | 193 | * end that can make pathnames ambiguous. |
e83c5163 | 194 | */ |
320d3a1b LT |
195 | static int verify_dotfile(const char *rest) |
196 | { | |
197 | /* | |
198 | * The first character was '.', but that | |
199 | * has already been discarded, we now test | |
200 | * the rest. | |
201 | */ | |
202 | switch (*rest) { | |
203 | /* "." is not allowed */ | |
204 | case '\0': case '/': | |
205 | return 0; | |
206 | ||
207 | /* | |
208 | * ".git" followed by NUL or slash is bad. This | |
209 | * shares the path end test with the ".." case. | |
210 | */ | |
211 | case 'g': | |
212 | if (rest[1] != 'i') | |
213 | break; | |
214 | if (rest[2] != 't') | |
215 | break; | |
216 | rest += 2; | |
217 | /* fallthrough */ | |
218 | case '.': | |
219 | if (rest[1] == '\0' || rest[1] == '/') | |
220 | return 0; | |
221 | } | |
222 | return 1; | |
223 | } | |
224 | ||
6b5ee137 | 225 | static int verify_path(const char *path) |
e83c5163 LT |
226 | { |
227 | char c; | |
228 | ||
229 | goto inside; | |
230 | for (;;) { | |
231 | if (!c) | |
232 | return 1; | |
233 | if (c == '/') { | |
234 | inside: | |
235 | c = *path++; | |
320d3a1b LT |
236 | switch (c) { |
237 | default: | |
e83c5163 | 238 | continue; |
320d3a1b LT |
239 | case '/': case '\0': |
240 | break; | |
241 | case '.': | |
242 | if (verify_dotfile(path)) | |
243 | continue; | |
244 | } | |
e83c5163 LT |
245 | return 0; |
246 | } | |
247 | c = *path++; | |
248 | } | |
249 | } | |
250 | ||
6b5ee137 | 251 | static int add_cacheinfo(const char *arg1, const char *arg2, const char *arg3) |
9945d980 | 252 | { |
192268c1 | 253 | int size, len, option; |
9945d980 LT |
254 | unsigned int mode; |
255 | unsigned char sha1[20]; | |
256 | struct cache_entry *ce; | |
257 | ||
258 | if (sscanf(arg1, "%o", &mode) != 1) | |
259 | return -1; | |
9945d980 LT |
260 | if (get_sha1_hex(arg2, sha1)) |
261 | return -1; | |
9945d980 LT |
262 | if (!verify_path(arg3)) |
263 | return -1; | |
9945d980 LT |
264 | |
265 | len = strlen(arg3); | |
266 | size = cache_entry_size(len); | |
812666c8 | 267 | ce = xmalloc(size); |
9945d980 LT |
268 | memset(ce, 0, size); |
269 | ||
270 | memcpy(ce->sha1, sha1, 20); | |
271 | memcpy(ce->name, arg3, len); | |
f5cabd13 | 272 | ce->ce_flags = htons(len); |
e4479470 | 273 | ce->ce_mode = create_ce_mode(mode); |
192268c1 JH |
274 | option = allow_add ? ADD_CACHE_OK_TO_ADD : 0; |
275 | option |= allow_replace ? ADD_CACHE_OK_TO_REPLACE : 0; | |
276 | return add_cache_entry(ce, option); | |
9945d980 LT |
277 | } |
278 | ||
e99d59ff | 279 | static struct cache_file cache_file; |
f2a19340 | 280 | |
ee1bec3d JH |
281 | |
282 | static void update_one(const char *path, const char *prefix, int prefix_length) | |
283 | { | |
284 | const char *p = prefix_path(prefix, prefix_length, path); | |
285 | if (!verify_path(p)) { | |
286 | fprintf(stderr, "Ignoring path %s\n", path); | |
287 | return; | |
288 | } | |
289 | if (force_remove) { | |
290 | if (remove_file_from_cache(p)) | |
291 | die("git-update-index: unable to remove %s", path); | |
292 | return; | |
293 | } | |
294 | if (add_file_to_cache(p)) | |
295 | die("Unable to process file %s", path); | |
296 | } | |
297 | ||
6b5ee137 | 298 | int main(int argc, const char **argv) |
e83c5163 | 299 | { |
ee1bec3d | 300 | int i, newfd, entries, has_errors = 0, line_termination = '\n'; |
121481ab | 301 | int allow_options = 1; |
ee1bec3d | 302 | int read_from_stdin = 0; |
cfb0af1d | 303 | const char *prefix = setup_git_directory(); |
ee1bec3d | 304 | int prefix_length = prefix ? strlen(prefix) : 0; |
bb233d69 | 305 | |
415e96c8 | 306 | newfd = hold_index_file_for_update(&cache_file, get_index_file()); |
9614b8dc | 307 | if (newfd < 0) |
2de381f9 | 308 | die("unable to create new cachefile"); |
9614b8dc | 309 | |
e83c5163 | 310 | entries = read_cache(); |
9614b8dc | 311 | if (entries < 0) |
2de381f9 | 312 | die("cache corrupted"); |
e83c5163 | 313 | |
e83c5163 | 314 | for (i = 1 ; i < argc; i++) { |
6b5ee137 | 315 | const char *path = argv[i]; |
121481ab LT |
316 | |
317 | if (allow_options && *path == '-') { | |
318 | if (!strcmp(path, "--")) { | |
319 | allow_options = 0; | |
320 | continue; | |
321 | } | |
0ed3715f LT |
322 | if (!strcmp(path, "-q")) { |
323 | quiet = 1; | |
324 | continue; | |
325 | } | |
121481ab LT |
326 | if (!strcmp(path, "--add")) { |
327 | allow_add = 1; | |
328 | continue; | |
329 | } | |
192268c1 JH |
330 | if (!strcmp(path, "--replace")) { |
331 | allow_replace = 1; | |
332 | continue; | |
333 | } | |
121481ab LT |
334 | if (!strcmp(path, "--remove")) { |
335 | allow_remove = 1; | |
336 | continue; | |
337 | } | |
338 | if (!strcmp(path, "--refresh")) { | |
90535218 | 339 | has_errors |= refresh_cache(); |
121481ab LT |
340 | continue; |
341 | } | |
9945d980 | 342 | if (!strcmp(path, "--cacheinfo")) { |
b3f94c4b | 343 | if (i+3 >= argc) |
215a7ad1 | 344 | die("git-update-index: --cacheinfo <mode> <sha1> <path>"); |
b3f94c4b | 345 | if (add_cacheinfo(argv[i+1], argv[i+2], argv[i+3])) |
215a7ad1 | 346 | die("git-update-index: --cacheinfo cannot add %s", argv[i+3]); |
9945d980 LT |
347 | i += 3; |
348 | continue; | |
349 | } | |
df6e1516 BL |
350 | if (!strcmp(path, "--info-only")) { |
351 | info_only = 1; | |
352 | continue; | |
353 | } | |
0ff5bf7c | 354 | if (!strcmp(path, "--force-remove")) { |
9b63f501 | 355 | force_remove = 1; |
0ff5bf7c JH |
356 | continue; |
357 | } | |
ee1bec3d JH |
358 | if (!strcmp(path, "-z")) { |
359 | line_termination = 0; | |
360 | continue; | |
361 | } | |
362 | if (!strcmp(path, "--stdin")) { | |
363 | if (i != argc - 1) | |
364 | die("--stdin must be at the end"); | |
365 | read_from_stdin = 1; | |
366 | break; | |
367 | } | |
c6e007b0 JB |
368 | if (!strcmp(path, "--ignore-missing")) { |
369 | not_new = 1; | |
370 | continue; | |
371 | } | |
2de381f9 | 372 | die("unknown option %s", path); |
121481ab | 373 | } |
ee1bec3d JH |
374 | update_one(path, prefix, prefix_length); |
375 | } | |
376 | if (read_from_stdin) { | |
377 | struct strbuf buf; | |
378 | strbuf_init(&buf); | |
379 | while (1) { | |
380 | read_line(&buf, stdin, line_termination); | |
381 | if (buf.eof) | |
382 | break; | |
383 | update_one(buf.buf, prefix, prefix_length); | |
9b63f501 | 384 | } |
e83c5163 | 385 | } |
415e96c8 JH |
386 | if (write_cache(newfd, active_cache, active_nr) || |
387 | commit_index_file(&cache_file)) | |
2de381f9 | 388 | die("Unable to write new cachefile"); |
9614b8dc | 389 | |
c4b83e61 | 390 | return has_errors ? 1 : 0; |
e83c5163 | 391 | } |