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Commit | Line | Data |
---|---|---|
8bc9a0c7 LT |
1 | /* |
2 | * GIT - The information manager from hell | |
3 | * | |
4 | * Copyright (C) Linus Torvalds, 2005 | |
5 | */ | |
4aab5b46 | 6 | #define NO_THE_INDEX_COMPATIBILITY_MACROS |
e83c5163 | 7 | #include "cache.h" |
bad68ec9 | 8 | #include "cache-tree.h" |
f35a6d3b | 9 | #include "refs.h" |
d616813d | 10 | #include "dir.h" |
041aee31 JH |
11 | #include "tree.h" |
12 | #include "commit.h" | |
13 | #include "diff.h" | |
14 | #include "diffcore.h" | |
15 | #include "revision.h" | |
39425819 | 16 | #include "blob.h" |
bad68ec9 JH |
17 | |
18 | /* Index extensions. | |
19 | * | |
20 | * The first letter should be 'A'..'Z' for extensions that are not | |
21 | * necessary for a correct operation (i.e. optimization data). | |
22 | * When new extensions are added that _needs_ to be understood in | |
23 | * order to correctly interpret the index file, pick character that | |
24 | * is outside the range, to cause the reader to abort. | |
25 | */ | |
26 | ||
27 | #define CACHE_EXT(s) ( (s[0]<<24)|(s[1]<<16)|(s[2]<<8)|(s[3]) ) | |
28 | #define CACHE_EXT_TREE 0x54524545 /* "TREE" */ | |
e83c5163 | 29 | |
228e94f9 | 30 | struct index_state the_index; |
8fd2cb40 | 31 | |
9cb76b8c JH |
32 | static void set_index_entry(struct index_state *istate, int nr, struct cache_entry *ce) |
33 | { | |
34 | istate->cache[nr] = ce; | |
96872bc2 | 35 | add_name_hash(istate, ce); |
9cb76b8c JH |
36 | } |
37 | ||
cf558704 LT |
38 | static void replace_index_entry(struct index_state *istate, int nr, struct cache_entry *ce) |
39 | { | |
40 | struct cache_entry *old = istate->cache[nr]; | |
41 | ||
96872bc2 | 42 | remove_name_hash(old); |
a22c6371 | 43 | set_index_entry(istate, nr, ce); |
cf558704 LT |
44 | istate->cache_changed = 1; |
45 | } | |
46 | ||
81dc2307 PB |
47 | void rename_index_entry_at(struct index_state *istate, int nr, const char *new_name) |
48 | { | |
49 | struct cache_entry *old = istate->cache[nr], *new; | |
50 | int namelen = strlen(new_name); | |
51 | ||
52 | new = xmalloc(cache_entry_size(namelen)); | |
53 | copy_cache_entry(new, old); | |
54 | new->ce_flags &= ~(CE_STATE_MASK | CE_NAMEMASK); | |
55 | new->ce_flags |= (namelen >= CE_NAMEMASK ? CE_NAMEMASK : namelen); | |
56 | memcpy(new->name, new_name, namelen + 1); | |
57 | ||
58 | cache_tree_invalidate_path(istate->cache_tree, old->name); | |
59 | remove_index_entry_at(istate, nr); | |
60 | add_index_entry(istate, new, ADD_CACHE_OK_TO_ADD|ADD_CACHE_OK_TO_REPLACE); | |
61 | } | |
62 | ||
415e96c8 JH |
63 | /* |
64 | * This only updates the "non-critical" parts of the directory | |
65 | * cache, ie the parts that aren't tracked by GIT, and only used | |
66 | * to validate the cache. | |
67 | */ | |
68 | void fill_stat_cache_info(struct cache_entry *ce, struct stat *st) | |
69 | { | |
7a51ed66 LT |
70 | ce->ce_ctime = st->st_ctime; |
71 | ce->ce_mtime = st->st_mtime; | |
72 | ce->ce_dev = st->st_dev; | |
73 | ce->ce_ino = st->st_ino; | |
74 | ce->ce_uid = st->st_uid; | |
75 | ce->ce_gid = st->st_gid; | |
76 | ce->ce_size = st->st_size; | |
5f73076c JH |
77 | |
78 | if (assume_unchanged) | |
7a51ed66 | 79 | ce->ce_flags |= CE_VALID; |
eadb5831 JH |
80 | |
81 | if (S_ISREG(st->st_mode)) | |
82 | ce_mark_uptodate(ce); | |
415e96c8 JH |
83 | } |
84 | ||
29e4d363 JH |
85 | static int ce_compare_data(struct cache_entry *ce, struct stat *st) |
86 | { | |
87 | int match = -1; | |
88 | int fd = open(ce->name, O_RDONLY); | |
89 | ||
90 | if (fd >= 0) { | |
91 | unsigned char sha1[20]; | |
53bca91a | 92 | if (!index_fd(sha1, fd, st, 0, OBJ_BLOB, ce->name)) |
a89fccd2 | 93 | match = hashcmp(sha1, ce->sha1); |
7f8508e8 | 94 | /* index_fd() closed the file descriptor already */ |
29e4d363 JH |
95 | } |
96 | return match; | |
97 | } | |
98 | ||
dc49cd76 | 99 | static int ce_compare_link(struct cache_entry *ce, size_t expected_size) |
29e4d363 JH |
100 | { |
101 | int match = -1; | |
29e4d363 JH |
102 | void *buffer; |
103 | unsigned long size; | |
21666f1a | 104 | enum object_type type; |
a60272b3 | 105 | struct strbuf sb = STRBUF_INIT; |
29e4d363 | 106 | |
a60272b3 | 107 | if (strbuf_readlink(&sb, ce->name, expected_size)) |
29e4d363 | 108 | return -1; |
a60272b3 | 109 | |
21666f1a | 110 | buffer = read_sha1_file(ce->sha1, &type, &size); |
a60272b3 LT |
111 | if (buffer) { |
112 | if (size == sb.len) | |
113 | match = memcmp(buffer, sb.buf, size); | |
114 | free(buffer); | |
29e4d363 | 115 | } |
a60272b3 | 116 | strbuf_release(&sb); |
29e4d363 JH |
117 | return match; |
118 | } | |
119 | ||
f35a6d3b LT |
120 | static int ce_compare_gitlink(struct cache_entry *ce) |
121 | { | |
122 | unsigned char sha1[20]; | |
123 | ||
124 | /* | |
125 | * We don't actually require that the .git directory | |
302b9282 | 126 | * under GITLINK directory be a valid git directory. It |
f35a6d3b LT |
127 | * might even be missing (in case nobody populated that |
128 | * sub-project). | |
129 | * | |
130 | * If so, we consider it always to match. | |
131 | */ | |
132 | if (resolve_gitlink_ref(ce->name, "HEAD", sha1) < 0) | |
133 | return 0; | |
134 | return hashcmp(sha1, ce->sha1); | |
135 | } | |
136 | ||
29e4d363 JH |
137 | static int ce_modified_check_fs(struct cache_entry *ce, struct stat *st) |
138 | { | |
139 | switch (st->st_mode & S_IFMT) { | |
140 | case S_IFREG: | |
141 | if (ce_compare_data(ce, st)) | |
142 | return DATA_CHANGED; | |
143 | break; | |
144 | case S_IFLNK: | |
dc49cd76 | 145 | if (ce_compare_link(ce, xsize_t(st->st_size))) |
29e4d363 JH |
146 | return DATA_CHANGED; |
147 | break; | |
a8ee75bc | 148 | case S_IFDIR: |
7a51ed66 | 149 | if (S_ISGITLINK(ce->ce_mode)) |
c70115b4 | 150 | return ce_compare_gitlink(ce) ? DATA_CHANGED : 0; |
29e4d363 JH |
151 | default: |
152 | return TYPE_CHANGED; | |
153 | } | |
154 | return 0; | |
155 | } | |
156 | ||
f55527f8 | 157 | int is_empty_blob_sha1(const unsigned char *sha1) |
f49c2c22 LT |
158 | { |
159 | static const unsigned char empty_blob_sha1[20] = { | |
160 | 0xe6,0x9d,0xe2,0x9b,0xb2,0xd1,0xd6,0x43,0x4b,0x8b, | |
161 | 0x29,0xae,0x77,0x5a,0xd8,0xc2,0xe4,0x8c,0x53,0x91 | |
162 | }; | |
163 | ||
164 | return !hashcmp(sha1, empty_blob_sha1); | |
165 | } | |
166 | ||
407c8eb0 | 167 | static int ce_match_stat_basic(struct cache_entry *ce, struct stat *st) |
734aab75 LT |
168 | { |
169 | unsigned int changed = 0; | |
170 | ||
7a51ed66 LT |
171 | if (ce->ce_flags & CE_REMOVE) |
172 | return MODE_CHANGED | DATA_CHANGED | TYPE_CHANGED; | |
173 | ||
174 | switch (ce->ce_mode & S_IFMT) { | |
8ae0a8c5 KS |
175 | case S_IFREG: |
176 | changed |= !S_ISREG(st->st_mode) ? TYPE_CHANGED : 0; | |
3e09cdfd JH |
177 | /* We consider only the owner x bit to be relevant for |
178 | * "mode changes" | |
179 | */ | |
180 | if (trust_executable_bit && | |
7a51ed66 | 181 | (0100 & (ce->ce_mode ^ st->st_mode))) |
ffbe1add | 182 | changed |= MODE_CHANGED; |
8ae0a8c5 KS |
183 | break; |
184 | case S_IFLNK: | |
78a8d641 JS |
185 | if (!S_ISLNK(st->st_mode) && |
186 | (has_symlinks || !S_ISREG(st->st_mode))) | |
187 | changed |= TYPE_CHANGED; | |
8ae0a8c5 | 188 | break; |
302b9282 | 189 | case S_IFGITLINK: |
c70115b4 | 190 | /* We ignore most of the st_xxx fields for gitlinks */ |
f35a6d3b LT |
191 | if (!S_ISDIR(st->st_mode)) |
192 | changed |= TYPE_CHANGED; | |
193 | else if (ce_compare_gitlink(ce)) | |
194 | changed |= DATA_CHANGED; | |
a8ee75bc | 195 | return changed; |
8ae0a8c5 | 196 | default: |
7a51ed66 | 197 | die("internal error: ce_mode is %o", ce->ce_mode); |
8ae0a8c5 | 198 | } |
7a51ed66 | 199 | if (ce->ce_mtime != (unsigned int) st->st_mtime) |
ccc4feb5 | 200 | changed |= MTIME_CHANGED; |
1ce4790b | 201 | if (trust_ctime && ce->ce_ctime != (unsigned int) st->st_ctime) |
734aab75 | 202 | changed |= CTIME_CHANGED; |
ccc4feb5 | 203 | |
7a51ed66 LT |
204 | if (ce->ce_uid != (unsigned int) st->st_uid || |
205 | ce->ce_gid != (unsigned int) st->st_gid) | |
734aab75 | 206 | changed |= OWNER_CHANGED; |
7a51ed66 | 207 | if (ce->ce_ino != (unsigned int) st->st_ino) |
734aab75 | 208 | changed |= INODE_CHANGED; |
2cb45e95 LT |
209 | |
210 | #ifdef USE_STDEV | |
211 | /* | |
212 | * st_dev breaks on network filesystems where different | |
213 | * clients will have different views of what "device" | |
214 | * the filesystem is on | |
215 | */ | |
7a51ed66 | 216 | if (ce->ce_dev != (unsigned int) st->st_dev) |
2cb45e95 LT |
217 | changed |= INODE_CHANGED; |
218 | #endif | |
219 | ||
7a51ed66 | 220 | if (ce->ce_size != (unsigned int) st->st_size) |
734aab75 | 221 | changed |= DATA_CHANGED; |
b0391890 | 222 | |
f49c2c22 LT |
223 | /* Racily smudged entry? */ |
224 | if (!ce->ce_size) { | |
225 | if (!is_empty_blob_sha1(ce->sha1)) | |
226 | changed |= DATA_CHANGED; | |
227 | } | |
228 | ||
407c8eb0 JH |
229 | return changed; |
230 | } | |
231 | ||
d1f128b0 | 232 | static int is_racy_timestamp(const struct index_state *istate, struct cache_entry *ce) |
6d91da6d | 233 | { |
050288d5 JH |
234 | return (!S_ISGITLINK(ce->ce_mode) && |
235 | istate->timestamp && | |
6d91da6d JH |
236 | ((unsigned int)istate->timestamp) <= ce->ce_mtime); |
237 | } | |
238 | ||
d1f128b0 | 239 | int ie_match_stat(const struct index_state *istate, |
4bd5b7da JH |
240 | struct cache_entry *ce, struct stat *st, |
241 | unsigned int options) | |
407c8eb0 | 242 | { |
5f73076c | 243 | unsigned int changed; |
4bd5b7da JH |
244 | int ignore_valid = options & CE_MATCH_IGNORE_VALID; |
245 | int assume_racy_is_modified = options & CE_MATCH_RACY_IS_DIRTY; | |
5f73076c JH |
246 | |
247 | /* | |
248 | * If it's marked as always valid in the index, it's | |
249 | * valid whatever the checked-out copy says. | |
250 | */ | |
7a51ed66 | 251 | if (!ignore_valid && (ce->ce_flags & CE_VALID)) |
5f73076c JH |
252 | return 0; |
253 | ||
331fcb59 JH |
254 | /* |
255 | * Intent-to-add entries have not been added, so the index entry | |
256 | * by definition never matches what is in the work tree until it | |
257 | * actually gets added. | |
258 | */ | |
259 | if (ce->ce_flags & CE_INTENT_TO_ADD) | |
260 | return DATA_CHANGED | TYPE_CHANGED | MODE_CHANGED; | |
261 | ||
5f73076c | 262 | changed = ce_match_stat_basic(ce, st); |
407c8eb0 | 263 | |
29e4d363 JH |
264 | /* |
265 | * Within 1 second of this sequence: | |
266 | * echo xyzzy >file && git-update-index --add file | |
267 | * running this command: | |
268 | * echo frotz >file | |
269 | * would give a falsely clean cache entry. The mtime and | |
270 | * length match the cache, and other stat fields do not change. | |
271 | * | |
272 | * We could detect this at update-index time (the cache entry | |
273 | * being registered/updated records the same time as "now") | |
274 | * and delay the return from git-update-index, but that would | |
275 | * effectively mean we can make at most one commit per second, | |
276 | * which is not acceptable. Instead, we check cache entries | |
277 | * whose mtime are the same as the index file timestamp more | |
5f73076c | 278 | * carefully than others. |
29e4d363 | 279 | */ |
6d91da6d | 280 | if (!changed && is_racy_timestamp(istate, ce)) { |
42f77406 JH |
281 | if (assume_racy_is_modified) |
282 | changed |= DATA_CHANGED; | |
283 | else | |
284 | changed |= ce_modified_check_fs(ce, st); | |
285 | } | |
b0391890 | 286 | |
29e4d363 | 287 | return changed; |
b0391890 JH |
288 | } |
289 | ||
d1f128b0 | 290 | int ie_modified(const struct index_state *istate, |
4bd5b7da | 291 | struct cache_entry *ce, struct stat *st, unsigned int options) |
b0391890 | 292 | { |
29e4d363 | 293 | int changed, changed_fs; |
4bd5b7da JH |
294 | |
295 | changed = ie_match_stat(istate, ce, st, options); | |
b0391890 JH |
296 | if (!changed) |
297 | return 0; | |
b0391890 JH |
298 | /* |
299 | * If the mode or type has changed, there's no point in trying | |
300 | * to refresh the entry - it's not going to match | |
301 | */ | |
302 | if (changed & (MODE_CHANGED | TYPE_CHANGED)) | |
303 | return changed; | |
304 | ||
c70115b4 JH |
305 | /* |
306 | * Immediately after read-tree or update-index --cacheinfo, | |
307 | * the length field is zero, as we have never even read the | |
308 | * lstat(2) information once, and we cannot trust DATA_CHANGED | |
309 | * returned by ie_match_stat() which in turn was returned by | |
310 | * ce_match_stat_basic() to signal that the filesize of the | |
311 | * blob changed. We have to actually go to the filesystem to | |
312 | * see if the contents match, and if so, should answer "unchanged". | |
313 | * | |
314 | * The logic does not apply to gitlinks, as ce_match_stat_basic() | |
315 | * already has checked the actual HEAD from the filesystem in the | |
316 | * subproject. If ie_match_stat() already said it is different, | |
317 | * then we know it is. | |
b0391890 | 318 | */ |
c70115b4 JH |
319 | if ((changed & DATA_CHANGED) && |
320 | (S_ISGITLINK(ce->ce_mode) || ce->ce_size != 0)) | |
b0391890 JH |
321 | return changed; |
322 | ||
29e4d363 JH |
323 | changed_fs = ce_modified_check_fs(ce, st); |
324 | if (changed_fs) | |
325 | return changed | changed_fs; | |
b0391890 JH |
326 | return 0; |
327 | } | |
328 | ||
958ba6c9 LT |
329 | int base_name_compare(const char *name1, int len1, int mode1, |
330 | const char *name2, int len2, int mode2) | |
331 | { | |
332 | unsigned char c1, c2; | |
333 | int len = len1 < len2 ? len1 : len2; | |
334 | int cmp; | |
335 | ||
336 | cmp = memcmp(name1, name2, len); | |
337 | if (cmp) | |
338 | return cmp; | |
339 | c1 = name1[len]; | |
340 | c2 = name2[len]; | |
1833a925 | 341 | if (!c1 && S_ISDIR(mode1)) |
958ba6c9 | 342 | c1 = '/'; |
1833a925 | 343 | if (!c2 && S_ISDIR(mode2)) |
958ba6c9 LT |
344 | c2 = '/'; |
345 | return (c1 < c2) ? -1 : (c1 > c2) ? 1 : 0; | |
346 | } | |
347 | ||
0ab9e1e8 LT |
348 | /* |
349 | * df_name_compare() is identical to base_name_compare(), except it | |
350 | * compares conflicting directory/file entries as equal. Note that | |
351 | * while a directory name compares as equal to a regular file, they | |
352 | * then individually compare _differently_ to a filename that has | |
353 | * a dot after the basename (because '\0' < '.' < '/'). | |
354 | * | |
355 | * This is used by routines that want to traverse the git namespace | |
356 | * but then handle conflicting entries together when possible. | |
357 | */ | |
358 | int df_name_compare(const char *name1, int len1, int mode1, | |
359 | const char *name2, int len2, int mode2) | |
360 | { | |
361 | int len = len1 < len2 ? len1 : len2, cmp; | |
362 | unsigned char c1, c2; | |
363 | ||
364 | cmp = memcmp(name1, name2, len); | |
365 | if (cmp) | |
366 | return cmp; | |
367 | /* Directories and files compare equal (same length, same name) */ | |
368 | if (len1 == len2) | |
369 | return 0; | |
370 | c1 = name1[len]; | |
371 | if (!c1 && S_ISDIR(mode1)) | |
372 | c1 = '/'; | |
373 | c2 = name2[len]; | |
374 | if (!c2 && S_ISDIR(mode2)) | |
375 | c2 = '/'; | |
376 | if (c1 == '/' && !c2) | |
377 | return 0; | |
378 | if (c2 == '/' && !c1) | |
379 | return 0; | |
380 | return c1 - c2; | |
381 | } | |
382 | ||
95fd5bf8 | 383 | int cache_name_compare(const char *name1, int flags1, const char *name2, int flags2) |
eb38c22f | 384 | { |
95fd5bf8 LT |
385 | int len1 = flags1 & CE_NAMEMASK; |
386 | int len2 = flags2 & CE_NAMEMASK; | |
eb38c22f LT |
387 | int len = len1 < len2 ? len1 : len2; |
388 | int cmp; | |
389 | ||
390 | cmp = memcmp(name1, name2, len); | |
391 | if (cmp) | |
392 | return cmp; | |
393 | if (len1 < len2) | |
394 | return -1; | |
395 | if (len1 > len2) | |
396 | return 1; | |
5f73076c | 397 | |
7b80be15 JH |
398 | /* Compare stages */ |
399 | flags1 &= CE_STAGEMASK; | |
400 | flags2 &= CE_STAGEMASK; | |
5f73076c | 401 | |
95fd5bf8 LT |
402 | if (flags1 < flags2) |
403 | return -1; | |
404 | if (flags1 > flags2) | |
405 | return 1; | |
eb38c22f LT |
406 | return 0; |
407 | } | |
408 | ||
d1f128b0 | 409 | int index_name_pos(const struct index_state *istate, const char *name, int namelen) |
eb38c22f LT |
410 | { |
411 | int first, last; | |
412 | ||
413 | first = 0; | |
4aab5b46 | 414 | last = istate->cache_nr; |
eb38c22f LT |
415 | while (last > first) { |
416 | int next = (last + first) >> 1; | |
4aab5b46 | 417 | struct cache_entry *ce = istate->cache[next]; |
7a51ed66 | 418 | int cmp = cache_name_compare(name, namelen, ce->name, ce->ce_flags); |
eb38c22f | 419 | if (!cmp) |
76e7f4ec | 420 | return next; |
eb38c22f LT |
421 | if (cmp < 0) { |
422 | last = next; | |
423 | continue; | |
424 | } | |
425 | first = next+1; | |
426 | } | |
76e7f4ec | 427 | return -first-1; |
eb38c22f LT |
428 | } |
429 | ||
7b937ca3 | 430 | /* Remove entry, return true if there are more entries to go.. */ |
4aab5b46 | 431 | int remove_index_entry_at(struct index_state *istate, int pos) |
7b937ca3 | 432 | { |
cf558704 LT |
433 | struct cache_entry *ce = istate->cache[pos]; |
434 | ||
96872bc2 | 435 | remove_name_hash(ce); |
4aab5b46 JH |
436 | istate->cache_changed = 1; |
437 | istate->cache_nr--; | |
438 | if (pos >= istate->cache_nr) | |
7b937ca3 | 439 | return 0; |
4aab5b46 JH |
440 | memmove(istate->cache + pos, |
441 | istate->cache + pos + 1, | |
442 | (istate->cache_nr - pos) * sizeof(struct cache_entry *)); | |
7b937ca3 LT |
443 | return 1; |
444 | } | |
445 | ||
36419c8e KB |
446 | /* |
447 | * Remove all cache ententries marked for removal, that is where | |
448 | * CE_REMOVE is set in ce_flags. This is much more effective than | |
449 | * calling remove_index_entry_at() for each entry to be removed. | |
450 | */ | |
451 | void remove_marked_cache_entries(struct index_state *istate) | |
452 | { | |
453 | struct cache_entry **ce_array = istate->cache; | |
454 | unsigned int i, j; | |
455 | ||
456 | for (i = j = 0; i < istate->cache_nr; i++) { | |
457 | if (ce_array[i]->ce_flags & CE_REMOVE) | |
458 | remove_name_hash(ce_array[i]); | |
459 | else | |
460 | ce_array[j++] = ce_array[i]; | |
461 | } | |
462 | istate->cache_changed = 1; | |
463 | istate->cache_nr = j; | |
464 | } | |
465 | ||
4aab5b46 | 466 | int remove_file_from_index(struct index_state *istate, const char *path) |
197ee8c9 | 467 | { |
4aab5b46 | 468 | int pos = index_name_pos(istate, path, strlen(path)); |
c4e3cca1 JH |
469 | if (pos < 0) |
470 | pos = -pos-1; | |
09d5dc32 | 471 | cache_tree_invalidate_path(istate->cache_tree, path); |
4aab5b46 JH |
472 | while (pos < istate->cache_nr && !strcmp(istate->cache[pos]->name, path)) |
473 | remove_index_entry_at(istate, pos); | |
197ee8c9 LT |
474 | return 0; |
475 | } | |
476 | ||
20314271 JS |
477 | static int compare_name(struct cache_entry *ce, const char *path, int namelen) |
478 | { | |
479 | return namelen != ce_namelen(ce) || memcmp(path, ce->name, namelen); | |
480 | } | |
481 | ||
482 | static int index_name_pos_also_unmerged(struct index_state *istate, | |
483 | const char *path, int namelen) | |
484 | { | |
485 | int pos = index_name_pos(istate, path, namelen); | |
486 | struct cache_entry *ce; | |
487 | ||
488 | if (pos >= 0) | |
489 | return pos; | |
490 | ||
491 | /* maybe unmerged? */ | |
492 | pos = -1 - pos; | |
493 | if (pos >= istate->cache_nr || | |
494 | compare_name((ce = istate->cache[pos]), path, namelen)) | |
495 | return -1; | |
496 | ||
497 | /* order of preference: stage 2, 1, 3 */ | |
498 | if (ce_stage(ce) == 1 && pos + 1 < istate->cache_nr && | |
499 | ce_stage((ce = istate->cache[pos + 1])) == 2 && | |
500 | !compare_name(ce, path, namelen)) | |
501 | pos++; | |
502 | return pos; | |
503 | } | |
504 | ||
1102952b LT |
505 | static int different_name(struct cache_entry *ce, struct cache_entry *alias) |
506 | { | |
507 | int len = ce_namelen(ce); | |
508 | return ce_namelen(alias) != len || memcmp(ce->name, alias->name, len); | |
509 | } | |
510 | ||
511 | /* | |
512 | * If we add a filename that aliases in the cache, we will use the | |
513 | * name that we already have - but we don't want to update the same | |
514 | * alias twice, because that implies that there were actually two | |
515 | * different files with aliasing names! | |
516 | * | |
517 | * So we use the CE_ADDED flag to verify that the alias was an old | |
518 | * one before we accept it as | |
519 | */ | |
520 | static struct cache_entry *create_alias_ce(struct cache_entry *ce, struct cache_entry *alias) | |
521 | { | |
522 | int len; | |
523 | struct cache_entry *new; | |
524 | ||
525 | if (alias->ce_flags & CE_ADDED) | |
526 | die("Will not add file alias '%s' ('%s' already exists in index)", ce->name, alias->name); | |
527 | ||
528 | /* Ok, create the new entry using the name of the existing alias */ | |
529 | len = ce_namelen(alias); | |
530 | new = xcalloc(1, cache_entry_size(len)); | |
531 | memcpy(new->name, alias->name, len); | |
532 | copy_cache_entry(new, ce); | |
533 | free(ce); | |
534 | return new; | |
535 | } | |
536 | ||
39425819 JH |
537 | static void record_intent_to_add(struct cache_entry *ce) |
538 | { | |
539 | unsigned char sha1[20]; | |
540 | if (write_sha1_file("", 0, blob_type, sha1)) | |
541 | die("cannot create an empty blob in the object database"); | |
542 | hashcpy(ce->sha1, sha1); | |
543 | } | |
544 | ||
38ed1d89 | 545 | int add_to_index(struct index_state *istate, const char *path, struct stat *st, int flags) |
11be42a4 | 546 | { |
38ed1d89 | 547 | int size, namelen, was_same; |
d177cab0 | 548 | mode_t st_mode = st->st_mode; |
6835550d | 549 | struct cache_entry *ce, *alias; |
fb63d7f8 | 550 | unsigned ce_option = CE_MATCH_IGNORE_VALID|CE_MATCH_RACY_IS_DIRTY; |
38ed1d89 JH |
551 | int verbose = flags & (ADD_CACHE_VERBOSE | ADD_CACHE_PRETEND); |
552 | int pretend = flags & ADD_CACHE_PRETEND; | |
39425819 JH |
553 | int intent_only = flags & ADD_CACHE_INTENT; |
554 | int add_option = (ADD_CACHE_OK_TO_ADD|ADD_CACHE_OK_TO_REPLACE| | |
555 | (intent_only ? ADD_CACHE_NEW_ONLY : 0)); | |
11be42a4 | 556 | |
d177cab0 | 557 | if (!S_ISREG(st_mode) && !S_ISLNK(st_mode) && !S_ISDIR(st_mode)) |
960b8ad1 | 558 | return error("%s: can only add regular files, symbolic links or git-directories", path); |
11be42a4 JS |
559 | |
560 | namelen = strlen(path); | |
d177cab0 | 561 | if (S_ISDIR(st_mode)) { |
09595258 LT |
562 | while (namelen && path[namelen-1] == '/') |
563 | namelen--; | |
564 | } | |
11be42a4 JS |
565 | size = cache_entry_size(namelen); |
566 | ce = xcalloc(1, size); | |
567 | memcpy(ce->name, path, namelen); | |
7a51ed66 | 568 | ce->ce_flags = namelen; |
39425819 JH |
569 | if (!intent_only) |
570 | fill_stat_cache_info(ce, st); | |
388b2acd JH |
571 | else |
572 | ce->ce_flags |= CE_INTENT_TO_ADD; | |
11be42a4 | 573 | |
78a8d641 | 574 | if (trust_executable_bit && has_symlinks) |
d177cab0 | 575 | ce->ce_mode = create_ce_mode(st_mode); |
185c975f | 576 | else { |
78a8d641 JS |
577 | /* If there is an existing entry, pick the mode bits and type |
578 | * from it, otherwise assume unexecutable regular file. | |
11be42a4 | 579 | */ |
185c975f | 580 | struct cache_entry *ent; |
20314271 | 581 | int pos = index_name_pos_also_unmerged(istate, path, namelen); |
185c975f | 582 | |
4aab5b46 | 583 | ent = (0 <= pos) ? istate->cache[pos] : NULL; |
d177cab0 | 584 | ce->ce_mode = ce_mode_from_stat(ent, st_mode); |
11be42a4 JS |
585 | } |
586 | ||
6835550d | 587 | alias = index_name_exists(istate, ce->name, ce_namelen(ce), ignore_case); |
d177cab0 | 588 | if (alias && !ce_stage(alias) && !ie_match_stat(istate, alias, st, ce_option)) { |
0781b8a9 JH |
589 | /* Nothing changed, really */ |
590 | free(ce); | |
6835550d | 591 | ce_mark_uptodate(alias); |
1102952b | 592 | alias->ce_flags |= CE_ADDED; |
0781b8a9 JH |
593 | return 0; |
594 | } | |
39425819 JH |
595 | if (!intent_only) { |
596 | if (index_path(ce->sha1, path, st, 1)) | |
597 | return error("unable to index file %s", path); | |
598 | } else | |
599 | record_intent_to_add(ce); | |
600 | ||
1102952b LT |
601 | if (ignore_case && alias && different_name(ce, alias)) |
602 | ce = create_alias_ce(ce, alias); | |
603 | ce->ce_flags |= CE_ADDED; | |
38ed1d89 | 604 | |
3bf0dd1f | 605 | /* It was suspected to be racily clean, but it turns out to be Ok */ |
38ed1d89 JH |
606 | was_same = (alias && |
607 | !ce_stage(alias) && | |
608 | !hashcmp(alias->sha1, ce->sha1) && | |
609 | ce->ce_mode == alias->ce_mode); | |
610 | ||
611 | if (pretend) | |
612 | ; | |
39425819 | 613 | else if (add_index_entry(istate, ce, add_option)) |
960b8ad1 | 614 | return error("unable to add %s to index",path); |
38ed1d89 | 615 | if (verbose && !was_same) |
11be42a4 | 616 | printf("add '%s'\n", path); |
11be42a4 JS |
617 | return 0; |
618 | } | |
619 | ||
38ed1d89 | 620 | int add_file_to_index(struct index_state *istate, const char *path, int flags) |
d177cab0 LT |
621 | { |
622 | struct stat st; | |
623 | if (lstat(path, &st)) | |
624 | die("%s: unable to stat (%s)", path, strerror(errno)); | |
38ed1d89 | 625 | return add_to_index(istate, path, &st, flags); |
d177cab0 LT |
626 | } |
627 | ||
6640f881 CR |
628 | struct cache_entry *make_cache_entry(unsigned int mode, |
629 | const unsigned char *sha1, const char *path, int stage, | |
630 | int refresh) | |
631 | { | |
632 | int size, len; | |
633 | struct cache_entry *ce; | |
634 | ||
7e7abea9 DP |
635 | if (!verify_path(path)) { |
636 | error("Invalid path '%s'", path); | |
6640f881 | 637 | return NULL; |
7e7abea9 | 638 | } |
6640f881 CR |
639 | |
640 | len = strlen(path); | |
641 | size = cache_entry_size(len); | |
642 | ce = xcalloc(1, size); | |
643 | ||
644 | hashcpy(ce->sha1, sha1); | |
645 | memcpy(ce->name, path, len); | |
646 | ce->ce_flags = create_ce_flags(len, stage); | |
647 | ce->ce_mode = create_ce_mode(mode); | |
648 | ||
649 | if (refresh) | |
650 | return refresh_cache_entry(ce, 0); | |
651 | ||
652 | return ce; | |
653 | } | |
654 | ||
dbbce55b | 655 | int ce_same_name(struct cache_entry *a, struct cache_entry *b) |
7b937ca3 LT |
656 | { |
657 | int len = ce_namelen(a); | |
658 | return ce_namelen(b) == len && !memcmp(a->name, b->name, len); | |
659 | } | |
660 | ||
c0fd1f51 LT |
661 | int ce_path_match(const struct cache_entry *ce, const char **pathspec) |
662 | { | |
663 | const char *match, *name; | |
664 | int len; | |
665 | ||
666 | if (!pathspec) | |
667 | return 1; | |
668 | ||
669 | len = ce_namelen(ce); | |
670 | name = ce->name; | |
671 | while ((match = *pathspec++) != NULL) { | |
672 | int matchlen = strlen(match); | |
673 | if (matchlen > len) | |
674 | continue; | |
675 | if (memcmp(name, match, matchlen)) | |
676 | continue; | |
677 | if (matchlen && name[matchlen-1] == '/') | |
678 | return 1; | |
679 | if (name[matchlen] == '/' || !name[matchlen]) | |
680 | return 1; | |
f332726e LT |
681 | if (!matchlen) |
682 | return 1; | |
c0fd1f51 LT |
683 | } |
684 | return 0; | |
685 | } | |
686 | ||
8dcf39c4 LT |
687 | /* |
688 | * We fundamentally don't like some paths: we don't want | |
689 | * dot or dot-dot anywhere, and for obvious reasons don't | |
690 | * want to recurse into ".git" either. | |
691 | * | |
692 | * Also, we don't want double slashes or slashes at the | |
693 | * end that can make pathnames ambiguous. | |
694 | */ | |
695 | static int verify_dotfile(const char *rest) | |
696 | { | |
697 | /* | |
698 | * The first character was '.', but that | |
699 | * has already been discarded, we now test | |
700 | * the rest. | |
701 | */ | |
702 | switch (*rest) { | |
703 | /* "." is not allowed */ | |
704 | case '\0': case '/': | |
705 | return 0; | |
706 | ||
707 | /* | |
708 | * ".git" followed by NUL or slash is bad. This | |
709 | * shares the path end test with the ".." case. | |
710 | */ | |
711 | case 'g': | |
712 | if (rest[1] != 'i') | |
713 | break; | |
714 | if (rest[2] != 't') | |
715 | break; | |
716 | rest += 2; | |
717 | /* fallthrough */ | |
718 | case '.': | |
719 | if (rest[1] == '\0' || rest[1] == '/') | |
720 | return 0; | |
721 | } | |
722 | return 1; | |
723 | } | |
724 | ||
725 | int verify_path(const char *path) | |
726 | { | |
727 | char c; | |
728 | ||
729 | goto inside; | |
730 | for (;;) { | |
731 | if (!c) | |
732 | return 1; | |
733 | if (c == '/') { | |
734 | inside: | |
735 | c = *path++; | |
736 | switch (c) { | |
737 | default: | |
738 | continue; | |
739 | case '/': case '\0': | |
740 | break; | |
741 | case '.': | |
742 | if (verify_dotfile(path)) | |
743 | continue; | |
744 | } | |
745 | return 0; | |
746 | } | |
747 | c = *path++; | |
748 | } | |
749 | } | |
750 | ||
12676608 LT |
751 | /* |
752 | * Do we have another file that has the beginning components being a | |
753 | * proper superset of the name we're trying to add? | |
0f1e4f04 | 754 | */ |
4aab5b46 JH |
755 | static int has_file_name(struct index_state *istate, |
756 | const struct cache_entry *ce, int pos, int ok_to_replace) | |
0f1e4f04 | 757 | { |
12676608 LT |
758 | int retval = 0; |
759 | int len = ce_namelen(ce); | |
b155725d | 760 | int stage = ce_stage(ce); |
12676608 | 761 | const char *name = ce->name; |
0f1e4f04 | 762 | |
4aab5b46 JH |
763 | while (pos < istate->cache_nr) { |
764 | struct cache_entry *p = istate->cache[pos++]; | |
0f1e4f04 | 765 | |
12676608 | 766 | if (len >= ce_namelen(p)) |
0f1e4f04 | 767 | break; |
12676608 LT |
768 | if (memcmp(name, p->name, len)) |
769 | break; | |
b155725d JH |
770 | if (ce_stage(p) != stage) |
771 | continue; | |
12676608 LT |
772 | if (p->name[len] != '/') |
773 | continue; | |
7a51ed66 | 774 | if (p->ce_flags & CE_REMOVE) |
21cd8d00 | 775 | continue; |
12676608 LT |
776 | retval = -1; |
777 | if (!ok_to_replace) | |
778 | break; | |
4aab5b46 | 779 | remove_index_entry_at(istate, --pos); |
0f1e4f04 | 780 | } |
12676608 LT |
781 | return retval; |
782 | } | |
0f1e4f04 | 783 | |
12676608 LT |
784 | /* |
785 | * Do we have another file with a pathname that is a proper | |
786 | * subset of the name we're trying to add? | |
787 | */ | |
4aab5b46 JH |
788 | static int has_dir_name(struct index_state *istate, |
789 | const struct cache_entry *ce, int pos, int ok_to_replace) | |
12676608 LT |
790 | { |
791 | int retval = 0; | |
b155725d | 792 | int stage = ce_stage(ce); |
12676608 LT |
793 | const char *name = ce->name; |
794 | const char *slash = name + ce_namelen(ce); | |
0f1e4f04 | 795 | |
12676608 LT |
796 | for (;;) { |
797 | int len; | |
0f1e4f04 | 798 | |
12676608 LT |
799 | for (;;) { |
800 | if (*--slash == '/') | |
801 | break; | |
802 | if (slash <= ce->name) | |
803 | return retval; | |
804 | } | |
805 | len = slash - name; | |
0f1e4f04 | 806 | |
7a51ed66 | 807 | pos = index_name_pos(istate, name, create_ce_flags(len, stage)); |
12676608 | 808 | if (pos >= 0) { |
21cd8d00 JH |
809 | /* |
810 | * Found one, but not so fast. This could | |
811 | * be a marker that says "I was here, but | |
812 | * I am being removed". Such an entry is | |
813 | * not a part of the resulting tree, and | |
814 | * it is Ok to have a directory at the same | |
815 | * path. | |
816 | */ | |
077c48df | 817 | if (!(istate->cache[pos]->ce_flags & CE_REMOVE)) { |
21cd8d00 JH |
818 | retval = -1; |
819 | if (!ok_to_replace) | |
820 | break; | |
4aab5b46 | 821 | remove_index_entry_at(istate, pos); |
21cd8d00 JH |
822 | continue; |
823 | } | |
12676608 | 824 | } |
21cd8d00 JH |
825 | else |
826 | pos = -pos-1; | |
12676608 LT |
827 | |
828 | /* | |
829 | * Trivial optimization: if we find an entry that | |
830 | * already matches the sub-directory, then we know | |
b155725d | 831 | * we're ok, and we can exit. |
12676608 | 832 | */ |
4aab5b46 JH |
833 | while (pos < istate->cache_nr) { |
834 | struct cache_entry *p = istate->cache[pos]; | |
b155725d JH |
835 | if ((ce_namelen(p) <= len) || |
836 | (p->name[len] != '/') || | |
837 | memcmp(p->name, name, len)) | |
838 | break; /* not our subdirectory */ | |
077c48df JH |
839 | if (ce_stage(p) == stage && !(p->ce_flags & CE_REMOVE)) |
840 | /* | |
841 | * p is at the same stage as our entry, and | |
b155725d JH |
842 | * is a subdirectory of what we are looking |
843 | * at, so we cannot have conflicts at our | |
844 | * level or anything shorter. | |
845 | */ | |
846 | return retval; | |
847 | pos++; | |
192268c1 | 848 | } |
0f1e4f04 | 849 | } |
12676608 LT |
850 | return retval; |
851 | } | |
852 | ||
853 | /* We may be in a situation where we already have path/file and path | |
854 | * is being added, or we already have path and path/file is being | |
855 | * added. Either one would result in a nonsense tree that has path | |
856 | * twice when git-write-tree tries to write it out. Prevent it. | |
a6080a0a | 857 | * |
12676608 LT |
858 | * If ok-to-replace is specified, we remove the conflicting entries |
859 | * from the cache so the caller should recompute the insert position. | |
860 | * When this happens, we return non-zero. | |
861 | */ | |
4aab5b46 JH |
862 | static int check_file_directory_conflict(struct index_state *istate, |
863 | const struct cache_entry *ce, | |
864 | int pos, int ok_to_replace) | |
12676608 | 865 | { |
21cd8d00 JH |
866 | int retval; |
867 | ||
868 | /* | |
869 | * When ce is an "I am going away" entry, we allow it to be added | |
870 | */ | |
7a51ed66 | 871 | if (ce->ce_flags & CE_REMOVE) |
21cd8d00 JH |
872 | return 0; |
873 | ||
12676608 LT |
874 | /* |
875 | * We check if the path is a sub-path of a subsequent pathname | |
876 | * first, since removing those will not change the position | |
21cd8d00 | 877 | * in the array. |
12676608 | 878 | */ |
4aab5b46 | 879 | retval = has_file_name(istate, ce, pos, ok_to_replace); |
21cd8d00 | 880 | |
12676608 LT |
881 | /* |
882 | * Then check if the path might have a clashing sub-directory | |
883 | * before it. | |
884 | */ | |
4aab5b46 | 885 | return retval + has_dir_name(istate, ce, pos, ok_to_replace); |
0f1e4f04 JH |
886 | } |
887 | ||
af3785dc | 888 | static int add_index_entry_with_check(struct index_state *istate, struct cache_entry *ce, int option) |
197ee8c9 LT |
889 | { |
890 | int pos; | |
192268c1 JH |
891 | int ok_to_add = option & ADD_CACHE_OK_TO_ADD; |
892 | int ok_to_replace = option & ADD_CACHE_OK_TO_REPLACE; | |
b155725d | 893 | int skip_df_check = option & ADD_CACHE_SKIP_DFCHECK; |
39425819 | 894 | int new_only = option & ADD_CACHE_NEW_ONLY; |
5f73076c | 895 | |
09d5dc32 | 896 | cache_tree_invalidate_path(istate->cache_tree, ce->name); |
7a51ed66 | 897 | pos = index_name_pos(istate, ce->name, ce->ce_flags); |
197ee8c9 | 898 | |
3e09cdfd | 899 | /* existing match? Just replace it. */ |
76e7f4ec | 900 | if (pos >= 0) { |
39425819 JH |
901 | if (!new_only) |
902 | replace_index_entry(istate, pos, ce); | |
197ee8c9 LT |
903 | return 0; |
904 | } | |
76e7f4ec | 905 | pos = -pos-1; |
197ee8c9 | 906 | |
7b937ca3 LT |
907 | /* |
908 | * Inserting a merged entry ("stage 0") into the index | |
909 | * will always replace all non-merged entries.. | |
910 | */ | |
4aab5b46 JH |
911 | if (pos < istate->cache_nr && ce_stage(ce) == 0) { |
912 | while (ce_same_name(istate->cache[pos], ce)) { | |
7b937ca3 | 913 | ok_to_add = 1; |
4aab5b46 | 914 | if (!remove_index_entry_at(istate, pos)) |
7b937ca3 LT |
915 | break; |
916 | } | |
917 | } | |
918 | ||
121481ab LT |
919 | if (!ok_to_add) |
920 | return -1; | |
8dcf39c4 | 921 | if (!verify_path(ce->name)) |
7e7abea9 | 922 | return error("Invalid path '%s'", ce->name); |
121481ab | 923 | |
3e09cdfd | 924 | if (!skip_df_check && |
4aab5b46 | 925 | check_file_directory_conflict(istate, ce, pos, ok_to_replace)) { |
192268c1 | 926 | if (!ok_to_replace) |
4aab5b46 JH |
927 | return error("'%s' appears as both a file and as a directory", |
928 | ce->name); | |
7a51ed66 | 929 | pos = index_name_pos(istate, ce->name, ce->ce_flags); |
192268c1 JH |
930 | pos = -pos-1; |
931 | } | |
af3785dc JH |
932 | return pos + 1; |
933 | } | |
934 | ||
935 | int add_index_entry(struct index_state *istate, struct cache_entry *ce, int option) | |
936 | { | |
937 | int pos; | |
938 | ||
939 | if (option & ADD_CACHE_JUST_APPEND) | |
940 | pos = istate->cache_nr; | |
941 | else { | |
942 | int ret; | |
943 | ret = add_index_entry_with_check(istate, ce, option); | |
944 | if (ret <= 0) | |
945 | return ret; | |
946 | pos = ret - 1; | |
947 | } | |
0f1e4f04 | 948 | |
197ee8c9 | 949 | /* Make sure the array is big enough .. */ |
4aab5b46 JH |
950 | if (istate->cache_nr == istate->cache_alloc) { |
951 | istate->cache_alloc = alloc_nr(istate->cache_alloc); | |
952 | istate->cache = xrealloc(istate->cache, | |
953 | istate->cache_alloc * sizeof(struct cache_entry *)); | |
197ee8c9 LT |
954 | } |
955 | ||
956 | /* Add it in.. */ | |
4aab5b46 | 957 | istate->cache_nr++; |
af3785dc | 958 | if (istate->cache_nr > pos + 1) |
4aab5b46 JH |
959 | memmove(istate->cache + pos + 1, |
960 | istate->cache + pos, | |
961 | (istate->cache_nr - pos - 1) * sizeof(ce)); | |
cf558704 | 962 | set_index_entry(istate, pos, ce); |
4aab5b46 | 963 | istate->cache_changed = 1; |
197ee8c9 LT |
964 | return 0; |
965 | } | |
966 | ||
405e5b2f LT |
967 | /* |
968 | * "refresh" does not calculate a new sha1 file or bring the | |
969 | * cache up-to-date for mode/content changes. But what it | |
970 | * _does_ do is to "re-match" the stat information of a file | |
971 | * with the cache, so that you can refresh the cache for a | |
972 | * file that hasn't been changed but where the stat entry is | |
973 | * out of date. | |
974 | * | |
975 | * For example, you'd want to do this after doing a "git-read-tree", | |
976 | * to link up the stat cache details with the proper files. | |
977 | */ | |
4aab5b46 | 978 | static struct cache_entry *refresh_cache_ent(struct index_state *istate, |
4bd5b7da JH |
979 | struct cache_entry *ce, |
980 | unsigned int options, int *err) | |
405e5b2f LT |
981 | { |
982 | struct stat st; | |
983 | struct cache_entry *updated; | |
984 | int changed, size; | |
4bd5b7da | 985 | int ignore_valid = options & CE_MATCH_IGNORE_VALID; |
405e5b2f | 986 | |
eadb5831 JH |
987 | if (ce_uptodate(ce)) |
988 | return ce; | |
989 | ||
aa9349d4 MSO |
990 | /* |
991 | * CE_VALID means the user promised us that the change to | |
992 | * the work tree does not matter and told us not to worry. | |
993 | */ | |
994 | if (!ignore_valid && (ce->ce_flags & CE_VALID)) { | |
995 | ce_mark_uptodate(ce); | |
996 | return ce; | |
997 | } | |
998 | ||
8fd2cb40 | 999 | if (lstat(ce->name, &st) < 0) { |
ec0cc704 JH |
1000 | if (err) |
1001 | *err = errno; | |
8fd2cb40 JS |
1002 | return NULL; |
1003 | } | |
405e5b2f | 1004 | |
4bd5b7da | 1005 | changed = ie_match_stat(istate, ce, &st, options); |
405e5b2f | 1006 | if (!changed) { |
4bd5b7da JH |
1007 | /* |
1008 | * The path is unchanged. If we were told to ignore | |
1009 | * valid bit, then we did the actual stat check and | |
1010 | * found that the entry is unmodified. If the entry | |
1011 | * is not marked VALID, this is the place to mark it | |
1012 | * valid again, under "assume unchanged" mode. | |
1013 | */ | |
1014 | if (ignore_valid && assume_unchanged && | |
7a51ed66 | 1015 | !(ce->ce_flags & CE_VALID)) |
405e5b2f | 1016 | ; /* mark this one VALID again */ |
eadb5831 JH |
1017 | else { |
1018 | /* | |
1019 | * We do not mark the index itself "modified" | |
1020 | * because CE_UPTODATE flag is in-core only; | |
1021 | * we are not going to write this change out. | |
1022 | */ | |
1023 | ce_mark_uptodate(ce); | |
8fd2cb40 | 1024 | return ce; |
eadb5831 | 1025 | } |
405e5b2f LT |
1026 | } |
1027 | ||
4bd5b7da | 1028 | if (ie_modified(istate, ce, &st, options)) { |
ec0cc704 JH |
1029 | if (err) |
1030 | *err = EINVAL; | |
8fd2cb40 JS |
1031 | return NULL; |
1032 | } | |
405e5b2f LT |
1033 | |
1034 | size = ce_size(ce); | |
1035 | updated = xmalloc(size); | |
1036 | memcpy(updated, ce, size); | |
1037 | fill_stat_cache_info(updated, &st); | |
4bd5b7da JH |
1038 | /* |
1039 | * If ignore_valid is not set, we should leave CE_VALID bit | |
1040 | * alone. Otherwise, paths marked with --no-assume-unchanged | |
1041 | * (i.e. things to be edited) will reacquire CE_VALID bit | |
1042 | * automatically, which is not really what we want. | |
405e5b2f | 1043 | */ |
4bd5b7da | 1044 | if (!ignore_valid && assume_unchanged && |
7a51ed66 LT |
1045 | !(ce->ce_flags & CE_VALID)) |
1046 | updated->ce_flags &= ~CE_VALID; | |
405e5b2f LT |
1047 | |
1048 | return updated; | |
1049 | } | |
1050 | ||
d616813d | 1051 | int refresh_index(struct index_state *istate, unsigned int flags, const char **pathspec, char *seen) |
405e5b2f LT |
1052 | { |
1053 | int i; | |
1054 | int has_errors = 0; | |
1055 | int really = (flags & REFRESH_REALLY) != 0; | |
1056 | int allow_unmerged = (flags & REFRESH_UNMERGED) != 0; | |
1057 | int quiet = (flags & REFRESH_QUIET) != 0; | |
1058 | int not_new = (flags & REFRESH_IGNORE_MISSING) != 0; | |
5fdeacb0 | 1059 | int ignore_submodules = (flags & REFRESH_IGNORE_SUBMODULES) != 0; |
4bd5b7da | 1060 | unsigned int options = really ? CE_MATCH_IGNORE_VALID : 0; |
d14e7407 | 1061 | const char *needs_update_message; |
405e5b2f | 1062 | |
d14e7407 JH |
1063 | needs_update_message = ((flags & REFRESH_SAY_CHANGED) |
1064 | ? "locally modified" : "needs update"); | |
4aab5b46 | 1065 | for (i = 0; i < istate->cache_nr; i++) { |
405e5b2f | 1066 | struct cache_entry *ce, *new; |
ec0cc704 JH |
1067 | int cache_errno = 0; |
1068 | ||
4aab5b46 | 1069 | ce = istate->cache[i]; |
5fdeacb0 JS |
1070 | if (ignore_submodules && S_ISGITLINK(ce->ce_mode)) |
1071 | continue; | |
1072 | ||
405e5b2f | 1073 | if (ce_stage(ce)) { |
4aab5b46 JH |
1074 | while ((i < istate->cache_nr) && |
1075 | ! strcmp(istate->cache[i]->name, ce->name)) | |
405e5b2f LT |
1076 | i++; |
1077 | i--; | |
1078 | if (allow_unmerged) | |
1079 | continue; | |
1080 | printf("%s: needs merge\n", ce->name); | |
1081 | has_errors = 1; | |
1082 | continue; | |
1083 | } | |
1084 | ||
d616813d AJ |
1085 | if (pathspec && !match_pathspec(pathspec, ce->name, strlen(ce->name), 0, seen)) |
1086 | continue; | |
1087 | ||
4bd5b7da | 1088 | new = refresh_cache_ent(istate, ce, options, &cache_errno); |
8fd2cb40 | 1089 | if (new == ce) |
405e5b2f | 1090 | continue; |
8fd2cb40 JS |
1091 | if (!new) { |
1092 | if (not_new && cache_errno == ENOENT) | |
405e5b2f | 1093 | continue; |
8fd2cb40 | 1094 | if (really && cache_errno == EINVAL) { |
405e5b2f LT |
1095 | /* If we are doing --really-refresh that |
1096 | * means the index is not valid anymore. | |
1097 | */ | |
7a51ed66 | 1098 | ce->ce_flags &= ~CE_VALID; |
4aab5b46 | 1099 | istate->cache_changed = 1; |
405e5b2f LT |
1100 | } |
1101 | if (quiet) | |
1102 | continue; | |
d14e7407 | 1103 | printf("%s: %s\n", ce->name, needs_update_message); |
405e5b2f LT |
1104 | has_errors = 1; |
1105 | continue; | |
1106 | } | |
cf558704 LT |
1107 | |
1108 | replace_index_entry(istate, i, new); | |
405e5b2f LT |
1109 | } |
1110 | return has_errors; | |
1111 | } | |
1112 | ||
ec0cc704 JH |
1113 | struct cache_entry *refresh_cache_entry(struct cache_entry *ce, int really) |
1114 | { | |
4aab5b46 | 1115 | return refresh_cache_ent(&the_index, ce, really, NULL); |
ec0cc704 JH |
1116 | } |
1117 | ||
bad68ec9 | 1118 | static int verify_hdr(struct cache_header *hdr, unsigned long size) |
e83c5163 | 1119 | { |
9126f009 | 1120 | git_SHA_CTX c; |
bad68ec9 | 1121 | unsigned char sha1[20]; |
e83c5163 | 1122 | |
ccc4feb5 | 1123 | if (hdr->hdr_signature != htonl(CACHE_SIGNATURE)) |
e83c5163 | 1124 | return error("bad signature"); |
06aaaa0b | 1125 | if (hdr->hdr_version != htonl(2) && hdr->hdr_version != htonl(3)) |
ca9be054 | 1126 | return error("bad index version"); |
9126f009 NP |
1127 | git_SHA1_Init(&c); |
1128 | git_SHA1_Update(&c, hdr, size - 20); | |
1129 | git_SHA1_Final(sha1, &c); | |
a89fccd2 | 1130 | if (hashcmp(sha1, (unsigned char *)hdr + size - 20)) |
ca9be054 | 1131 | return error("bad index file sha1 signature"); |
e83c5163 LT |
1132 | return 0; |
1133 | } | |
1134 | ||
4aab5b46 JH |
1135 | static int read_index_extension(struct index_state *istate, |
1136 | const char *ext, void *data, unsigned long sz) | |
bad68ec9 JH |
1137 | { |
1138 | switch (CACHE_EXT(ext)) { | |
1139 | case CACHE_EXT_TREE: | |
4aab5b46 | 1140 | istate->cache_tree = cache_tree_read(data, sz); |
bad68ec9 JH |
1141 | break; |
1142 | default: | |
1143 | if (*ext < 'A' || 'Z' < *ext) | |
1144 | return error("index uses %.4s extension, which we do not understand", | |
1145 | ext); | |
1146 | fprintf(stderr, "ignoring %.4s extension\n", ext); | |
1147 | break; | |
1148 | } | |
1149 | return 0; | |
1150 | } | |
1151 | ||
4aab5b46 | 1152 | int read_index(struct index_state *istate) |
8fd2cb40 | 1153 | { |
4aab5b46 | 1154 | return read_index_from(istate, get_index_file()); |
8fd2cb40 JS |
1155 | } |
1156 | ||
7a51ed66 LT |
1157 | static void convert_from_disk(struct ondisk_cache_entry *ondisk, struct cache_entry *ce) |
1158 | { | |
7fec10b7 | 1159 | size_t len; |
06aaaa0b | 1160 | const char *name; |
7fec10b7 | 1161 | |
7a51ed66 LT |
1162 | ce->ce_ctime = ntohl(ondisk->ctime.sec); |
1163 | ce->ce_mtime = ntohl(ondisk->mtime.sec); | |
1164 | ce->ce_dev = ntohl(ondisk->dev); | |
1165 | ce->ce_ino = ntohl(ondisk->ino); | |
1166 | ce->ce_mode = ntohl(ondisk->mode); | |
1167 | ce->ce_uid = ntohl(ondisk->uid); | |
1168 | ce->ce_gid = ntohl(ondisk->gid); | |
1169 | ce->ce_size = ntohl(ondisk->size); | |
1170 | /* On-disk flags are just 16 bits */ | |
1171 | ce->ce_flags = ntohs(ondisk->flags); | |
16ce2e4c | 1172 | |
7a51ed66 | 1173 | hashcpy(ce->sha1, ondisk->sha1); |
7fec10b7 JH |
1174 | |
1175 | len = ce->ce_flags & CE_NAMEMASK; | |
06aaaa0b NTND |
1176 | |
1177 | if (ce->ce_flags & CE_EXTENDED) { | |
1178 | struct ondisk_cache_entry_extended *ondisk2; | |
1179 | int extended_flags; | |
1180 | ondisk2 = (struct ondisk_cache_entry_extended *)ondisk; | |
1181 | extended_flags = ntohs(ondisk2->flags2) << 16; | |
1182 | /* We do not yet understand any bit out of CE_EXTENDED_FLAGS */ | |
1183 | if (extended_flags & ~CE_EXTENDED_FLAGS) | |
1184 | die("Unknown index entry format %08x", extended_flags); | |
1185 | ce->ce_flags |= extended_flags; | |
1186 | name = ondisk2->name; | |
1187 | } | |
1188 | else | |
1189 | name = ondisk->name; | |
1190 | ||
7fec10b7 | 1191 | if (len == CE_NAMEMASK) |
06aaaa0b | 1192 | len = strlen(name); |
7fec10b7 JH |
1193 | /* |
1194 | * NEEDSWORK: If the original index is crafted, this copy could | |
1195 | * go unchecked. | |
1196 | */ | |
06aaaa0b | 1197 | memcpy(ce->name, name, len + 1); |
7a51ed66 LT |
1198 | } |
1199 | ||
cf558704 LT |
1200 | static inline size_t estimate_cache_size(size_t ondisk_size, unsigned int entries) |
1201 | { | |
1202 | long per_entry; | |
1203 | ||
1204 | per_entry = sizeof(struct cache_entry) - sizeof(struct ondisk_cache_entry); | |
1205 | ||
1206 | /* | |
1207 | * Alignment can cause differences. This should be "alignof", but | |
1208 | * since that's a gcc'ism, just use the size of a pointer. | |
1209 | */ | |
1210 | per_entry += sizeof(void *); | |
1211 | return ondisk_size + entries*per_entry; | |
1212 | } | |
1213 | ||
8fd2cb40 | 1214 | /* remember to discard_cache() before reading a different cache! */ |
4aab5b46 | 1215 | int read_index_from(struct index_state *istate, const char *path) |
e83c5163 LT |
1216 | { |
1217 | int fd, i; | |
1218 | struct stat st; | |
7a51ed66 | 1219 | unsigned long src_offset, dst_offset; |
e83c5163 | 1220 | struct cache_header *hdr; |
7a51ed66 LT |
1221 | void *mmap; |
1222 | size_t mmap_size; | |
e83c5163 LT |
1223 | |
1224 | errno = EBUSY; | |
913e0e99 | 1225 | if (istate->initialized) |
4aab5b46 | 1226 | return istate->cache_nr; |
5d1a5c02 | 1227 | |
e83c5163 | 1228 | errno = ENOENT; |
4aab5b46 | 1229 | istate->timestamp = 0; |
8fd2cb40 | 1230 | fd = open(path, O_RDONLY); |
5d1a5c02 LT |
1231 | if (fd < 0) { |
1232 | if (errno == ENOENT) | |
1233 | return 0; | |
1234 | die("index file open failed (%s)", strerror(errno)); | |
1235 | } | |
e83c5163 | 1236 | |
3511a377 | 1237 | if (fstat(fd, &st)) |
5fe5c830 | 1238 | die("cannot stat the open index (%s)", strerror(errno)); |
3511a377 LFC |
1239 | |
1240 | errno = EINVAL; | |
7a51ed66 LT |
1241 | mmap_size = xsize_t(st.st_size); |
1242 | if (mmap_size < sizeof(struct cache_header) + 20) | |
3511a377 LFC |
1243 | die("index file smaller than expected"); |
1244 | ||
7a51ed66 | 1245 | mmap = xmmap(NULL, mmap_size, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0); |
e83c5163 | 1246 | close(fd); |
7a51ed66 LT |
1247 | if (mmap == MAP_FAILED) |
1248 | die("unable to map index file"); | |
e83c5163 | 1249 | |
7a51ed66 LT |
1250 | hdr = mmap; |
1251 | if (verify_hdr(hdr, mmap_size) < 0) | |
e83c5163 LT |
1252 | goto unmap; |
1253 | ||
4aab5b46 JH |
1254 | istate->cache_nr = ntohl(hdr->hdr_entries); |
1255 | istate->cache_alloc = alloc_nr(istate->cache_nr); | |
1256 | istate->cache = xcalloc(istate->cache_alloc, sizeof(struct cache_entry *)); | |
e83c5163 | 1257 | |
7a51ed66 LT |
1258 | /* |
1259 | * The disk format is actually larger than the in-memory format, | |
1260 | * due to space for nsec etc, so even though the in-memory one | |
1261 | * has room for a few more flags, we can allocate using the same | |
1262 | * index size | |
1263 | */ | |
cf558704 | 1264 | istate->alloc = xmalloc(estimate_cache_size(mmap_size, istate->cache_nr)); |
913e0e99 | 1265 | istate->initialized = 1; |
7a51ed66 LT |
1266 | |
1267 | src_offset = sizeof(*hdr); | |
1268 | dst_offset = 0; | |
4aab5b46 | 1269 | for (i = 0; i < istate->cache_nr; i++) { |
7a51ed66 | 1270 | struct ondisk_cache_entry *disk_ce; |
4aab5b46 JH |
1271 | struct cache_entry *ce; |
1272 | ||
7a51ed66 LT |
1273 | disk_ce = (struct ondisk_cache_entry *)((char *)mmap + src_offset); |
1274 | ce = (struct cache_entry *)((char *)istate->alloc + dst_offset); | |
1275 | convert_from_disk(disk_ce, ce); | |
cf558704 | 1276 | set_index_entry(istate, i, ce); |
7a51ed66 LT |
1277 | |
1278 | src_offset += ondisk_ce_size(ce); | |
1279 | dst_offset += ce_size(ce); | |
e83c5163 | 1280 | } |
4aab5b46 | 1281 | istate->timestamp = st.st_mtime; |
7a51ed66 | 1282 | while (src_offset <= mmap_size - 20 - 8) { |
bad68ec9 JH |
1283 | /* After an array of active_nr index entries, |
1284 | * there can be arbitrary number of extended | |
1285 | * sections, each of which is prefixed with | |
1286 | * extension name (4-byte) and section length | |
1287 | * in 4-byte network byte order. | |
1288 | */ | |
1289 | unsigned long extsize; | |
7a51ed66 | 1290 | memcpy(&extsize, (char *)mmap + src_offset + 4, 4); |
bad68ec9 | 1291 | extsize = ntohl(extsize); |
4aab5b46 | 1292 | if (read_index_extension(istate, |
7a51ed66 LT |
1293 | (const char *) mmap + src_offset, |
1294 | (char *) mmap + src_offset + 8, | |
1d7f171c | 1295 | extsize) < 0) |
bad68ec9 | 1296 | goto unmap; |
7a51ed66 LT |
1297 | src_offset += 8; |
1298 | src_offset += extsize; | |
bad68ec9 | 1299 | } |
7a51ed66 | 1300 | munmap(mmap, mmap_size); |
4aab5b46 | 1301 | return istate->cache_nr; |
e83c5163 LT |
1302 | |
1303 | unmap: | |
7a51ed66 | 1304 | munmap(mmap, mmap_size); |
e83c5163 | 1305 | errno = EINVAL; |
5d1a5c02 | 1306 | die("index file corrupt"); |
e83c5163 LT |
1307 | } |
1308 | ||
fa7b3c2f JH |
1309 | int is_index_unborn(struct index_state *istate) |
1310 | { | |
1311 | return (!istate->cache_nr && !istate->alloc && !istate->timestamp); | |
1312 | } | |
1313 | ||
4aab5b46 | 1314 | int discard_index(struct index_state *istate) |
6d297f81 | 1315 | { |
4aab5b46 JH |
1316 | istate->cache_nr = 0; |
1317 | istate->cache_changed = 0; | |
1318 | istate->timestamp = 0; | |
64ca23af | 1319 | istate->name_hash_initialized = 0; |
cf558704 | 1320 | free_hash(&istate->name_hash); |
4aab5b46 | 1321 | cache_tree_free(&(istate->cache_tree)); |
7a51ed66 LT |
1322 | free(istate->alloc); |
1323 | istate->alloc = NULL; | |
913e0e99 | 1324 | istate->initialized = 0; |
6d297f81 JS |
1325 | |
1326 | /* no need to throw away allocated active_cache */ | |
7a51ed66 | 1327 | return 0; |
6d297f81 JS |
1328 | } |
1329 | ||
d1f128b0 | 1330 | int unmerged_index(const struct index_state *istate) |
94a5728c DB |
1331 | { |
1332 | int i; | |
1333 | for (i = 0; i < istate->cache_nr; i++) { | |
1334 | if (ce_stage(istate->cache[i])) | |
1335 | return 1; | |
1336 | } | |
1337 | return 0; | |
1338 | } | |
1339 | ||
4990aadc | 1340 | #define WRITE_BUFFER_SIZE 8192 |
bf0f910d | 1341 | static unsigned char write_buffer[WRITE_BUFFER_SIZE]; |
4990aadc LT |
1342 | static unsigned long write_buffer_len; |
1343 | ||
9126f009 | 1344 | static int ce_write_flush(git_SHA_CTX *context, int fd) |
6015c28b JH |
1345 | { |
1346 | unsigned int buffered = write_buffer_len; | |
1347 | if (buffered) { | |
9126f009 | 1348 | git_SHA1_Update(context, write_buffer, buffered); |
93822c22 | 1349 | if (write_in_full(fd, write_buffer, buffered) != buffered) |
6015c28b JH |
1350 | return -1; |
1351 | write_buffer_len = 0; | |
1352 | } | |
1353 | return 0; | |
1354 | } | |
1355 | ||
9126f009 | 1356 | static int ce_write(git_SHA_CTX *context, int fd, void *data, unsigned int len) |
4990aadc LT |
1357 | { |
1358 | while (len) { | |
1359 | unsigned int buffered = write_buffer_len; | |
1360 | unsigned int partial = WRITE_BUFFER_SIZE - buffered; | |
1361 | if (partial > len) | |
1362 | partial = len; | |
1363 | memcpy(write_buffer + buffered, data, partial); | |
1364 | buffered += partial; | |
1365 | if (buffered == WRITE_BUFFER_SIZE) { | |
6015c28b JH |
1366 | write_buffer_len = buffered; |
1367 | if (ce_write_flush(context, fd)) | |
4990aadc LT |
1368 | return -1; |
1369 | buffered = 0; | |
1370 | } | |
1371 | write_buffer_len = buffered; | |
1372 | len -= partial; | |
1d7f171c | 1373 | data = (char *) data + partial; |
a6080a0a JH |
1374 | } |
1375 | return 0; | |
4990aadc LT |
1376 | } |
1377 | ||
9126f009 | 1378 | static int write_index_ext_header(git_SHA_CTX *context, int fd, |
ac58c7b1 | 1379 | unsigned int ext, unsigned int sz) |
bad68ec9 JH |
1380 | { |
1381 | ext = htonl(ext); | |
1382 | sz = htonl(sz); | |
968a1d65 DR |
1383 | return ((ce_write(context, fd, &ext, 4) < 0) || |
1384 | (ce_write(context, fd, &sz, 4) < 0)) ? -1 : 0; | |
bad68ec9 JH |
1385 | } |
1386 | ||
9126f009 | 1387 | static int ce_flush(git_SHA_CTX *context, int fd) |
4990aadc LT |
1388 | { |
1389 | unsigned int left = write_buffer_len; | |
ca9be054 | 1390 | |
4990aadc LT |
1391 | if (left) { |
1392 | write_buffer_len = 0; | |
9126f009 | 1393 | git_SHA1_Update(context, write_buffer, left); |
4990aadc | 1394 | } |
ca9be054 | 1395 | |
2c865d9a QH |
1396 | /* Flush first if not enough space for SHA1 signature */ |
1397 | if (left + 20 > WRITE_BUFFER_SIZE) { | |
93822c22 | 1398 | if (write_in_full(fd, write_buffer, left) != left) |
2c865d9a QH |
1399 | return -1; |
1400 | left = 0; | |
1401 | } | |
1402 | ||
ca9be054 | 1403 | /* Append the SHA1 signature at the end */ |
9126f009 | 1404 | git_SHA1_Final(write_buffer + left, context); |
ca9be054 | 1405 | left += 20; |
93822c22 | 1406 | return (write_in_full(fd, write_buffer, left) != left) ? -1 : 0; |
4990aadc LT |
1407 | } |
1408 | ||
407c8eb0 JH |
1409 | static void ce_smudge_racily_clean_entry(struct cache_entry *ce) |
1410 | { | |
1411 | /* | |
1412 | * The only thing we care about in this function is to smudge the | |
1413 | * falsely clean entry due to touch-update-touch race, so we leave | |
1414 | * everything else as they are. We are called for entries whose | |
1415 | * ce_mtime match the index file mtime. | |
c70115b4 JH |
1416 | * |
1417 | * Note that this actually does not do much for gitlinks, for | |
1418 | * which ce_match_stat_basic() always goes to the actual | |
1419 | * contents. The caller checks with is_racy_timestamp() which | |
1420 | * always says "no" for gitlinks, so we are not called for them ;-) | |
407c8eb0 JH |
1421 | */ |
1422 | struct stat st; | |
1423 | ||
1424 | if (lstat(ce->name, &st) < 0) | |
1425 | return; | |
1426 | if (ce_match_stat_basic(ce, &st)) | |
1427 | return; | |
1428 | if (ce_modified_check_fs(ce, &st)) { | |
4b3511b0 JH |
1429 | /* This is "racily clean"; smudge it. Note that this |
1430 | * is a tricky code. At first glance, it may appear | |
1431 | * that it can break with this sequence: | |
1432 | * | |
1433 | * $ echo xyzzy >frotz | |
1434 | * $ git-update-index --add frotz | |
1435 | * $ : >frotz | |
1436 | * $ sleep 3 | |
1437 | * $ echo filfre >nitfol | |
1438 | * $ git-update-index --add nitfol | |
1439 | * | |
b7e58b17 | 1440 | * but it does not. When the second update-index runs, |
4b3511b0 JH |
1441 | * it notices that the entry "frotz" has the same timestamp |
1442 | * as index, and if we were to smudge it by resetting its | |
1443 | * size to zero here, then the object name recorded | |
1444 | * in index is the 6-byte file but the cached stat information | |
1445 | * becomes zero --- which would then match what we would | |
a6080a0a | 1446 | * obtain from the filesystem next time we stat("frotz"). |
4b3511b0 JH |
1447 | * |
1448 | * However, the second update-index, before calling | |
1449 | * this function, notices that the cached size is 6 | |
1450 | * bytes and what is on the filesystem is an empty | |
1451 | * file, and never calls us, so the cached size information | |
1452 | * for "frotz" stays 6 which does not match the filesystem. | |
1453 | */ | |
7a51ed66 | 1454 | ce->ce_size = 0; |
407c8eb0 JH |
1455 | } |
1456 | } | |
1457 | ||
9126f009 | 1458 | static int ce_write_entry(git_SHA_CTX *c, int fd, struct cache_entry *ce) |
7a51ed66 LT |
1459 | { |
1460 | int size = ondisk_ce_size(ce); | |
1461 | struct ondisk_cache_entry *ondisk = xcalloc(1, size); | |
06aaaa0b | 1462 | char *name; |
7a51ed66 LT |
1463 | |
1464 | ondisk->ctime.sec = htonl(ce->ce_ctime); | |
1465 | ondisk->ctime.nsec = 0; | |
1466 | ondisk->mtime.sec = htonl(ce->ce_mtime); | |
1467 | ondisk->mtime.nsec = 0; | |
1468 | ondisk->dev = htonl(ce->ce_dev); | |
1469 | ondisk->ino = htonl(ce->ce_ino); | |
1470 | ondisk->mode = htonl(ce->ce_mode); | |
1471 | ondisk->uid = htonl(ce->ce_uid); | |
1472 | ondisk->gid = htonl(ce->ce_gid); | |
1473 | ondisk->size = htonl(ce->ce_size); | |
1474 | hashcpy(ondisk->sha1, ce->sha1); | |
1475 | ondisk->flags = htons(ce->ce_flags); | |
06aaaa0b NTND |
1476 | if (ce->ce_flags & CE_EXTENDED) { |
1477 | struct ondisk_cache_entry_extended *ondisk2; | |
1478 | ondisk2 = (struct ondisk_cache_entry_extended *)ondisk; | |
1479 | ondisk2->flags2 = htons((ce->ce_flags & CE_EXTENDED_FLAGS) >> 16); | |
1480 | name = ondisk2->name; | |
1481 | } | |
1482 | else | |
1483 | name = ondisk->name; | |
1484 | memcpy(name, ce->name, ce_namelen(ce)); | |
7a51ed66 LT |
1485 | |
1486 | return ce_write(c, fd, ondisk, size); | |
1487 | } | |
1488 | ||
d1f128b0 | 1489 | int write_index(const struct index_state *istate, int newfd) |
197ee8c9 | 1490 | { |
9126f009 | 1491 | git_SHA_CTX c; |
197ee8c9 | 1492 | struct cache_header hdr; |
06aaaa0b | 1493 | int i, err, removed, extended; |
4aab5b46 JH |
1494 | struct cache_entry **cache = istate->cache; |
1495 | int entries = istate->cache_nr; | |
025a0709 | 1496 | |
06aaaa0b | 1497 | for (i = removed = extended = 0; i < entries; i++) { |
7a51ed66 | 1498 | if (cache[i]->ce_flags & CE_REMOVE) |
025a0709 | 1499 | removed++; |
197ee8c9 | 1500 | |
06aaaa0b NTND |
1501 | /* reduce extended entries if possible */ |
1502 | cache[i]->ce_flags &= ~CE_EXTENDED; | |
1503 | if (cache[i]->ce_flags & CE_EXTENDED_FLAGS) { | |
1504 | extended++; | |
1505 | cache[i]->ce_flags |= CE_EXTENDED; | |
1506 | } | |
1507 | } | |
1508 | ||
ccc4feb5 | 1509 | hdr.hdr_signature = htonl(CACHE_SIGNATURE); |
06aaaa0b NTND |
1510 | /* for extended format, increase version so older git won't try to read it */ |
1511 | hdr.hdr_version = htonl(extended ? 3 : 2); | |
025a0709 | 1512 | hdr.hdr_entries = htonl(entries - removed); |
197ee8c9 | 1513 | |
9126f009 | 1514 | git_SHA1_Init(&c); |
ca9be054 | 1515 | if (ce_write(&c, newfd, &hdr, sizeof(hdr)) < 0) |
197ee8c9 LT |
1516 | return -1; |
1517 | ||
1518 | for (i = 0; i < entries; i++) { | |
1519 | struct cache_entry *ce = cache[i]; | |
7a51ed66 | 1520 | if (ce->ce_flags & CE_REMOVE) |
aa16021e | 1521 | continue; |
e06c43c7 | 1522 | if (!ce_uptodate(ce) && is_racy_timestamp(istate, ce)) |
407c8eb0 | 1523 | ce_smudge_racily_clean_entry(ce); |
7a51ed66 | 1524 | if (ce_write_entry(&c, newfd, ce) < 0) |
197ee8c9 LT |
1525 | return -1; |
1526 | } | |
1af1c2b6 | 1527 | |
bad68ec9 | 1528 | /* Write extension data here */ |
4aab5b46 | 1529 | if (istate->cache_tree) { |
f285a2d7 | 1530 | struct strbuf sb = STRBUF_INIT; |
1dffb8fa | 1531 | |
1dffb8fa PH |
1532 | cache_tree_write(&sb, istate->cache_tree); |
1533 | err = write_index_ext_header(&c, newfd, CACHE_EXT_TREE, sb.len) < 0 | |
1534 | || ce_write(&c, newfd, sb.buf, sb.len) < 0; | |
1535 | strbuf_release(&sb); | |
1536 | if (err) | |
bad68ec9 | 1537 | return -1; |
bad68ec9 JH |
1538 | } |
1539 | return ce_flush(&c, newfd); | |
197ee8c9 | 1540 | } |
e46bbcf6 MV |
1541 | |
1542 | /* | |
1543 | * Read the index file that is potentially unmerged into given | |
63e8dc5b | 1544 | * index_state, dropping any unmerged entries. Returns true if |
e46bbcf6 MV |
1545 | * the index is unmerged. Callers who want to refuse to work |
1546 | * from an unmerged state can call this and check its return value, | |
1547 | * instead of calling read_cache(). | |
1548 | */ | |
1549 | int read_index_unmerged(struct index_state *istate) | |
1550 | { | |
1551 | int i; | |
d1a43f2a | 1552 | int unmerged = 0; |
e46bbcf6 MV |
1553 | |
1554 | read_index(istate); | |
e46bbcf6 MV |
1555 | for (i = 0; i < istate->cache_nr; i++) { |
1556 | struct cache_entry *ce = istate->cache[i]; | |
d1a43f2a JH |
1557 | struct cache_entry *new_ce; |
1558 | int size, len; | |
1559 | ||
1560 | if (!ce_stage(ce)) | |
e46bbcf6 | 1561 | continue; |
d1a43f2a JH |
1562 | unmerged = 1; |
1563 | len = strlen(ce->name); | |
1564 | size = cache_entry_size(len); | |
1565 | new_ce = xcalloc(1, size); | |
1566 | hashcpy(new_ce->sha1, ce->sha1); | |
1567 | memcpy(new_ce->name, ce->name, len); | |
1568 | new_ce->ce_flags = create_ce_flags(len, 0); | |
1569 | new_ce->ce_mode = ce->ce_mode; | |
1570 | if (add_index_entry(istate, new_ce, 0)) | |
1571 | return error("%s: cannot drop to stage #0", | |
1572 | ce->name); | |
1573 | i = index_name_pos(istate, new_ce->name, len); | |
e46bbcf6 | 1574 | } |
d1a43f2a | 1575 | return unmerged; |
e46bbcf6 | 1576 | } |
041aee31 JH |
1577 | |
1578 | struct update_callback_data | |
1579 | { | |
1580 | int flags; | |
1581 | int add_errors; | |
1582 | }; | |
1583 | ||
1584 | static void update_callback(struct diff_queue_struct *q, | |
1585 | struct diff_options *opt, void *cbdata) | |
1586 | { | |
1587 | int i; | |
1588 | struct update_callback_data *data = cbdata; | |
1589 | ||
1590 | for (i = 0; i < q->nr; i++) { | |
1591 | struct diff_filepair *p = q->queue[i]; | |
1592 | const char *path = p->one->path; | |
1593 | switch (p->status) { | |
1594 | default: | |
1595 | die("unexpected diff status %c", p->status); | |
1596 | case DIFF_STATUS_UNMERGED: | |
4cc8d6c6 JH |
1597 | /* |
1598 | * ADD_CACHE_IGNORE_REMOVAL is unset if "git | |
1599 | * add -u" is calling us, In such a case, a | |
1600 | * missing work tree file needs to be removed | |
1601 | * if there is an unmerged entry at stage #2, | |
1602 | * but such a diff record is followed by | |
1603 | * another with DIFF_STATUS_DELETED (and if | |
1604 | * there is no stage #2, we won't see DELETED | |
1605 | * nor MODIFIED). We can simply continue | |
1606 | * either way. | |
1607 | */ | |
1608 | if (!(data->flags & ADD_CACHE_IGNORE_REMOVAL)) | |
1609 | continue; | |
1610 | /* | |
1611 | * Otherwise, it is "git add path" is asking | |
1612 | * to explicitly add it; we fall through. A | |
1613 | * missing work tree file is an error and is | |
1614 | * caught by add_file_to_index() in such a | |
1615 | * case. | |
1616 | */ | |
041aee31 JH |
1617 | case DIFF_STATUS_MODIFIED: |
1618 | case DIFF_STATUS_TYPE_CHANGED: | |
1619 | if (add_file_to_index(&the_index, path, data->flags)) { | |
1620 | if (!(data->flags & ADD_CACHE_IGNORE_ERRORS)) | |
1621 | die("updating files failed"); | |
1622 | data->add_errors++; | |
1623 | } | |
1624 | break; | |
1625 | case DIFF_STATUS_DELETED: | |
1626 | if (data->flags & ADD_CACHE_IGNORE_REMOVAL) | |
1627 | break; | |
1628 | if (!(data->flags & ADD_CACHE_PRETEND)) | |
1629 | remove_file_from_index(&the_index, path); | |
1630 | if (data->flags & (ADD_CACHE_PRETEND|ADD_CACHE_VERBOSE)) | |
1631 | printf("remove '%s'\n", path); | |
1632 | break; | |
1633 | } | |
1634 | } | |
1635 | } | |
1636 | ||
1637 | int add_files_to_cache(const char *prefix, const char **pathspec, int flags) | |
1638 | { | |
1639 | struct update_callback_data data; | |
1640 | struct rev_info rev; | |
1641 | init_revisions(&rev, prefix); | |
1642 | setup_revisions(0, NULL, &rev, NULL); | |
1643 | rev.prune_data = pathspec; | |
1644 | rev.diffopt.output_format = DIFF_FORMAT_CALLBACK; | |
1645 | rev.diffopt.format_callback = update_callback; | |
1646 | data.flags = flags; | |
1647 | data.add_errors = 0; | |
1648 | rev.diffopt.format_callback_data = &data; | |
1649 | run_diff_files(&rev, DIFF_RACY_IS_MODIFIED); | |
1650 | return !!data.add_errors; | |
1651 | } | |
1652 | ||
98fa4738 JK |
1653 | /* |
1654 | * Returns 1 if the path is an "other" path with respect to | |
1655 | * the index; that is, the path is not mentioned in the index at all, | |
1656 | * either as a file, a directory with some files in the index, | |
1657 | * or as an unmerged entry. | |
1658 | * | |
1659 | * We helpfully remove a trailing "/" from directories so that | |
1660 | * the output of read_directory can be used as-is. | |
1661 | */ | |
1662 | int index_name_is_other(const struct index_state *istate, const char *name, | |
1663 | int namelen) | |
1664 | { | |
1665 | int pos; | |
1666 | if (namelen && name[namelen - 1] == '/') | |
1667 | namelen--; | |
1668 | pos = index_name_pos(istate, name, namelen); | |
1669 | if (0 <= pos) | |
1670 | return 0; /* exact match */ | |
1671 | pos = -pos - 1; | |
1672 | if (pos < istate->cache_nr) { | |
1673 | struct cache_entry *ce = istate->cache[pos]; | |
1674 | if (ce_namelen(ce) == namelen && | |
1675 | !memcmp(ce->name, name, namelen)) | |
1676 | return 0; /* Yup, this one exists unmerged */ | |
1677 | } | |
1678 | return 1; | |
1679 | } |