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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" |
f6ecc62d | 8 | #include "tempfile.h" |
697cc8ef | 9 | #include "lockfile.h" |
bad68ec9 | 10 | #include "cache-tree.h" |
f35a6d3b | 11 | #include "refs.h" |
d616813d | 12 | #include "dir.h" |
041aee31 JH |
13 | #include "tree.h" |
14 | #include "commit.h" | |
39425819 | 15 | #include "blob.h" |
cfc5789a | 16 | #include "resolve-undo.h" |
6c9cd161 JH |
17 | #include "strbuf.h" |
18 | #include "varint.h" | |
5fc2fc8f | 19 | #include "split-index.h" |
a42643aa | 20 | #include "utf8.h" |
bad68ec9 | 21 | |
b60e188c TG |
22 | /* Mask for the name length in ce_flags in the on-disk index */ |
23 | ||
24 | #define CE_NAMEMASK (0x0fff) | |
25 | ||
bad68ec9 JH |
26 | /* Index extensions. |
27 | * | |
28 | * The first letter should be 'A'..'Z' for extensions that are not | |
29 | * necessary for a correct operation (i.e. optimization data). | |
30 | * When new extensions are added that _needs_ to be understood in | |
31 | * order to correctly interpret the index file, pick character that | |
32 | * is outside the range, to cause the reader to abort. | |
33 | */ | |
34 | ||
35 | #define CACHE_EXT(s) ( (s[0]<<24)|(s[1]<<16)|(s[2]<<8)|(s[3]) ) | |
36 | #define CACHE_EXT_TREE 0x54524545 /* "TREE" */ | |
b659b49b | 37 | #define CACHE_EXT_RESOLVE_UNDO 0x52455543 /* "REUC" */ |
5fc2fc8f | 38 | #define CACHE_EXT_LINK 0x6c696e6b /* "link" */ |
83c094ad | 39 | #define CACHE_EXT_UNTRACKED 0x554E5452 /* "UNTR" */ |
5fc2fc8f NTND |
40 | |
41 | /* changes that can be kept in $GIT_DIR/index (basically all extensions) */ | |
e0cf0d7d | 42 | #define EXTMASK (RESOLVE_UNDO_CHANGED | CACHE_TREE_CHANGED | \ |
c18b80a0 | 43 | CE_ENTRY_ADDED | CE_ENTRY_REMOVED | CE_ENTRY_CHANGED | \ |
1bbb3dba | 44 | SPLIT_INDEX_ORDERED | UNTRACKED_CHANGED) |
e83c5163 | 45 | |
228e94f9 | 46 | struct index_state the_index; |
626f35c8 | 47 | static const char *alternate_index_output; |
8fd2cb40 | 48 | |
9cb76b8c JH |
49 | static void set_index_entry(struct index_state *istate, int nr, struct cache_entry *ce) |
50 | { | |
51 | istate->cache[nr] = ce; | |
96872bc2 | 52 | add_name_hash(istate, ce); |
9cb76b8c JH |
53 | } |
54 | ||
cf558704 LT |
55 | static void replace_index_entry(struct index_state *istate, int nr, struct cache_entry *ce) |
56 | { | |
57 | struct cache_entry *old = istate->cache[nr]; | |
58 | ||
078a58e8 | 59 | replace_index_entry_in_base(istate, old, ce); |
2092678c | 60 | remove_name_hash(istate, old); |
5699d17e | 61 | free(old); |
a22c6371 | 62 | set_index_entry(istate, nr, ce); |
078a58e8 | 63 | ce->ce_flags |= CE_UPDATE_IN_BASE; |
e636a7b4 | 64 | istate->cache_changed |= CE_ENTRY_CHANGED; |
cf558704 LT |
65 | } |
66 | ||
81dc2307 PB |
67 | void rename_index_entry_at(struct index_state *istate, int nr, const char *new_name) |
68 | { | |
69 | struct cache_entry *old = istate->cache[nr], *new; | |
70 | int namelen = strlen(new_name); | |
71 | ||
72 | new = xmalloc(cache_entry_size(namelen)); | |
73 | copy_cache_entry(new, old); | |
419a597f | 74 | new->ce_flags &= ~CE_HASHED; |
b60e188c | 75 | new->ce_namelen = namelen; |
5fc2fc8f | 76 | new->index = 0; |
81dc2307 PB |
77 | memcpy(new->name, new_name, namelen + 1); |
78 | ||
a5400efe | 79 | cache_tree_invalidate_path(istate, old->name); |
e931371a | 80 | untracked_cache_remove_from_index(istate, old->name); |
81dc2307 PB |
81 | remove_index_entry_at(istate, nr); |
82 | add_index_entry(istate, new, ADD_CACHE_OK_TO_ADD|ADD_CACHE_OK_TO_REPLACE); | |
83 | } | |
84 | ||
c21d39d7 MH |
85 | void fill_stat_data(struct stat_data *sd, struct stat *st) |
86 | { | |
87 | sd->sd_ctime.sec = (unsigned int)st->st_ctime; | |
88 | sd->sd_mtime.sec = (unsigned int)st->st_mtime; | |
89 | sd->sd_ctime.nsec = ST_CTIME_NSEC(*st); | |
90 | sd->sd_mtime.nsec = ST_MTIME_NSEC(*st); | |
91 | sd->sd_dev = st->st_dev; | |
92 | sd->sd_ino = st->st_ino; | |
93 | sd->sd_uid = st->st_uid; | |
94 | sd->sd_gid = st->st_gid; | |
95 | sd->sd_size = st->st_size; | |
96 | } | |
97 | ||
98 | int match_stat_data(const struct stat_data *sd, struct stat *st) | |
99 | { | |
100 | int changed = 0; | |
101 | ||
102 | if (sd->sd_mtime.sec != (unsigned int)st->st_mtime) | |
103 | changed |= MTIME_CHANGED; | |
104 | if (trust_ctime && check_stat && | |
105 | sd->sd_ctime.sec != (unsigned int)st->st_ctime) | |
106 | changed |= CTIME_CHANGED; | |
107 | ||
108 | #ifdef USE_NSEC | |
109 | if (check_stat && sd->sd_mtime.nsec != ST_MTIME_NSEC(*st)) | |
110 | changed |= MTIME_CHANGED; | |
111 | if (trust_ctime && check_stat && | |
112 | sd->sd_ctime.nsec != ST_CTIME_NSEC(*st)) | |
113 | changed |= CTIME_CHANGED; | |
114 | #endif | |
115 | ||
116 | if (check_stat) { | |
117 | if (sd->sd_uid != (unsigned int) st->st_uid || | |
118 | sd->sd_gid != (unsigned int) st->st_gid) | |
119 | changed |= OWNER_CHANGED; | |
120 | if (sd->sd_ino != (unsigned int) st->st_ino) | |
121 | changed |= INODE_CHANGED; | |
122 | } | |
123 | ||
124 | #ifdef USE_STDEV | |
125 | /* | |
126 | * st_dev breaks on network filesystems where different | |
127 | * clients will have different views of what "device" | |
128 | * the filesystem is on | |
129 | */ | |
130 | if (check_stat && sd->sd_dev != (unsigned int) st->st_dev) | |
131 | changed |= INODE_CHANGED; | |
132 | #endif | |
133 | ||
134 | if (sd->sd_size != (unsigned int) st->st_size) | |
135 | changed |= DATA_CHANGED; | |
136 | ||
137 | return changed; | |
138 | } | |
139 | ||
415e96c8 JH |
140 | /* |
141 | * This only updates the "non-critical" parts of the directory | |
142 | * cache, ie the parts that aren't tracked by GIT, and only used | |
143 | * to validate the cache. | |
144 | */ | |
145 | void fill_stat_cache_info(struct cache_entry *ce, struct stat *st) | |
146 | { | |
c21d39d7 | 147 | fill_stat_data(&ce->ce_stat_data, st); |
5f73076c JH |
148 | |
149 | if (assume_unchanged) | |
7a51ed66 | 150 | ce->ce_flags |= CE_VALID; |
eadb5831 JH |
151 | |
152 | if (S_ISREG(st->st_mode)) | |
153 | ce_mark_uptodate(ce); | |
415e96c8 JH |
154 | } |
155 | ||
21a6b9fa | 156 | static int ce_compare_data(const struct cache_entry *ce, struct stat *st) |
29e4d363 JH |
157 | { |
158 | int match = -1; | |
1b8ac5ea | 159 | int fd = git_open_cloexec(ce->name, O_RDONLY); |
29e4d363 JH |
160 | |
161 | if (fd >= 0) { | |
162 | unsigned char sha1[20]; | |
c4ce46fc | 163 | if (!index_fd(sha1, fd, st, OBJ_BLOB, ce->name, 0)) |
99d1a986 | 164 | match = hashcmp(sha1, ce->oid.hash); |
7f8508e8 | 165 | /* index_fd() closed the file descriptor already */ |
29e4d363 JH |
166 | } |
167 | return match; | |
168 | } | |
169 | ||
21a6b9fa | 170 | static int ce_compare_link(const struct cache_entry *ce, size_t expected_size) |
29e4d363 JH |
171 | { |
172 | int match = -1; | |
29e4d363 JH |
173 | void *buffer; |
174 | unsigned long size; | |
21666f1a | 175 | enum object_type type; |
a60272b3 | 176 | struct strbuf sb = STRBUF_INIT; |
29e4d363 | 177 | |
a60272b3 | 178 | if (strbuf_readlink(&sb, ce->name, expected_size)) |
29e4d363 | 179 | return -1; |
a60272b3 | 180 | |
99d1a986 | 181 | buffer = read_sha1_file(ce->oid.hash, &type, &size); |
a60272b3 LT |
182 | if (buffer) { |
183 | if (size == sb.len) | |
184 | match = memcmp(buffer, sb.buf, size); | |
185 | free(buffer); | |
29e4d363 | 186 | } |
a60272b3 | 187 | strbuf_release(&sb); |
29e4d363 JH |
188 | return match; |
189 | } | |
190 | ||
21a6b9fa | 191 | static int ce_compare_gitlink(const struct cache_entry *ce) |
f35a6d3b LT |
192 | { |
193 | unsigned char sha1[20]; | |
194 | ||
195 | /* | |
196 | * We don't actually require that the .git directory | |
302b9282 | 197 | * under GITLINK directory be a valid git directory. It |
f35a6d3b LT |
198 | * might even be missing (in case nobody populated that |
199 | * sub-project). | |
200 | * | |
201 | * If so, we consider it always to match. | |
202 | */ | |
203 | if (resolve_gitlink_ref(ce->name, "HEAD", sha1) < 0) | |
204 | return 0; | |
99d1a986 | 205 | return hashcmp(sha1, ce->oid.hash); |
f35a6d3b LT |
206 | } |
207 | ||
21a6b9fa | 208 | static int ce_modified_check_fs(const struct cache_entry *ce, struct stat *st) |
29e4d363 JH |
209 | { |
210 | switch (st->st_mode & S_IFMT) { | |
211 | case S_IFREG: | |
212 | if (ce_compare_data(ce, st)) | |
213 | return DATA_CHANGED; | |
214 | break; | |
215 | case S_IFLNK: | |
dc49cd76 | 216 | if (ce_compare_link(ce, xsize_t(st->st_size))) |
29e4d363 JH |
217 | return DATA_CHANGED; |
218 | break; | |
a8ee75bc | 219 | case S_IFDIR: |
7a51ed66 | 220 | if (S_ISGITLINK(ce->ce_mode)) |
c70115b4 | 221 | return ce_compare_gitlink(ce) ? DATA_CHANGED : 0; |
29e4d363 JH |
222 | default: |
223 | return TYPE_CHANGED; | |
224 | } | |
225 | return 0; | |
226 | } | |
227 | ||
21a6b9fa | 228 | static int ce_match_stat_basic(const struct cache_entry *ce, struct stat *st) |
734aab75 LT |
229 | { |
230 | unsigned int changed = 0; | |
231 | ||
7a51ed66 LT |
232 | if (ce->ce_flags & CE_REMOVE) |
233 | return MODE_CHANGED | DATA_CHANGED | TYPE_CHANGED; | |
234 | ||
235 | switch (ce->ce_mode & S_IFMT) { | |
8ae0a8c5 KS |
236 | case S_IFREG: |
237 | changed |= !S_ISREG(st->st_mode) ? TYPE_CHANGED : 0; | |
3e09cdfd JH |
238 | /* We consider only the owner x bit to be relevant for |
239 | * "mode changes" | |
240 | */ | |
241 | if (trust_executable_bit && | |
7a51ed66 | 242 | (0100 & (ce->ce_mode ^ st->st_mode))) |
ffbe1add | 243 | changed |= MODE_CHANGED; |
8ae0a8c5 KS |
244 | break; |
245 | case S_IFLNK: | |
78a8d641 JS |
246 | if (!S_ISLNK(st->st_mode) && |
247 | (has_symlinks || !S_ISREG(st->st_mode))) | |
248 | changed |= TYPE_CHANGED; | |
8ae0a8c5 | 249 | break; |
302b9282 | 250 | case S_IFGITLINK: |
c70115b4 | 251 | /* We ignore most of the st_xxx fields for gitlinks */ |
f35a6d3b LT |
252 | if (!S_ISDIR(st->st_mode)) |
253 | changed |= TYPE_CHANGED; | |
254 | else if (ce_compare_gitlink(ce)) | |
255 | changed |= DATA_CHANGED; | |
a8ee75bc | 256 | return changed; |
8ae0a8c5 | 257 | default: |
7a51ed66 | 258 | die("internal error: ce_mode is %o", ce->ce_mode); |
8ae0a8c5 | 259 | } |
2cb45e95 | 260 | |
c21d39d7 | 261 | changed |= match_stat_data(&ce->ce_stat_data, st); |
b0391890 | 262 | |
f49c2c22 | 263 | /* Racily smudged entry? */ |
c21d39d7 | 264 | if (!ce->ce_stat_data.sd_size) { |
99d1a986 | 265 | if (!is_empty_blob_sha1(ce->oid.hash)) |
f49c2c22 LT |
266 | changed |= DATA_CHANGED; |
267 | } | |
268 | ||
407c8eb0 JH |
269 | return changed; |
270 | } | |
271 | ||
2bb4cda1 NTND |
272 | static int is_racy_stat(const struct index_state *istate, |
273 | const struct stat_data *sd) | |
6d91da6d | 274 | { |
2bb4cda1 | 275 | return (istate->timestamp.sec && |
fba2f38a KB |
276 | #ifdef USE_NSEC |
277 | /* nanosecond timestamped files can also be racy! */ | |
2bb4cda1 NTND |
278 | (istate->timestamp.sec < sd->sd_mtime.sec || |
279 | (istate->timestamp.sec == sd->sd_mtime.sec && | |
280 | istate->timestamp.nsec <= sd->sd_mtime.nsec)) | |
fba2f38a | 281 | #else |
2bb4cda1 | 282 | istate->timestamp.sec <= sd->sd_mtime.sec |
fba2f38a | 283 | #endif |
2bb4cda1 NTND |
284 | ); |
285 | } | |
286 | ||
287 | static int is_racy_timestamp(const struct index_state *istate, | |
288 | const struct cache_entry *ce) | |
289 | { | |
290 | return (!S_ISGITLINK(ce->ce_mode) && | |
291 | is_racy_stat(istate, &ce->ce_stat_data)); | |
6d91da6d JH |
292 | } |
293 | ||
ed4efab1 NTND |
294 | int match_stat_data_racy(const struct index_state *istate, |
295 | const struct stat_data *sd, struct stat *st) | |
296 | { | |
297 | if (is_racy_stat(istate, sd)) | |
298 | return MTIME_CHANGED; | |
299 | return match_stat_data(sd, st); | |
6d91da6d JH |
300 | } |
301 | ||
d1f128b0 | 302 | int ie_match_stat(const struct index_state *istate, |
21a6b9fa | 303 | const struct cache_entry *ce, struct stat *st, |
4bd5b7da | 304 | unsigned int options) |
407c8eb0 | 305 | { |
5f73076c | 306 | unsigned int changed; |
4bd5b7da | 307 | int ignore_valid = options & CE_MATCH_IGNORE_VALID; |
56cac48c | 308 | int ignore_skip_worktree = options & CE_MATCH_IGNORE_SKIP_WORKTREE; |
4bd5b7da | 309 | int assume_racy_is_modified = options & CE_MATCH_RACY_IS_DIRTY; |
5f73076c JH |
310 | |
311 | /* | |
312 | * If it's marked as always valid in the index, it's | |
313 | * valid whatever the checked-out copy says. | |
56cac48c NTND |
314 | * |
315 | * skip-worktree has the same effect with higher precedence | |
5f73076c | 316 | */ |
56cac48c NTND |
317 | if (!ignore_skip_worktree && ce_skip_worktree(ce)) |
318 | return 0; | |
7a51ed66 | 319 | if (!ignore_valid && (ce->ce_flags & CE_VALID)) |
5f73076c JH |
320 | return 0; |
321 | ||
331fcb59 JH |
322 | /* |
323 | * Intent-to-add entries have not been added, so the index entry | |
324 | * by definition never matches what is in the work tree until it | |
325 | * actually gets added. | |
326 | */ | |
895ff3b2 | 327 | if (ce_intent_to_add(ce)) |
331fcb59 JH |
328 | return DATA_CHANGED | TYPE_CHANGED | MODE_CHANGED; |
329 | ||
5f73076c | 330 | changed = ce_match_stat_basic(ce, st); |
407c8eb0 | 331 | |
29e4d363 JH |
332 | /* |
333 | * Within 1 second of this sequence: | |
334 | * echo xyzzy >file && git-update-index --add file | |
335 | * running this command: | |
336 | * echo frotz >file | |
337 | * would give a falsely clean cache entry. The mtime and | |
338 | * length match the cache, and other stat fields do not change. | |
339 | * | |
340 | * We could detect this at update-index time (the cache entry | |
341 | * being registered/updated records the same time as "now") | |
342 | * and delay the return from git-update-index, but that would | |
343 | * effectively mean we can make at most one commit per second, | |
344 | * which is not acceptable. Instead, we check cache entries | |
345 | * whose mtime are the same as the index file timestamp more | |
5f73076c | 346 | * carefully than others. |
29e4d363 | 347 | */ |
6d91da6d | 348 | if (!changed && is_racy_timestamp(istate, ce)) { |
42f77406 JH |
349 | if (assume_racy_is_modified) |
350 | changed |= DATA_CHANGED; | |
351 | else | |
352 | changed |= ce_modified_check_fs(ce, st); | |
353 | } | |
b0391890 | 354 | |
29e4d363 | 355 | return changed; |
b0391890 JH |
356 | } |
357 | ||
d1f128b0 | 358 | int ie_modified(const struct index_state *istate, |
21a6b9fa RS |
359 | const struct cache_entry *ce, |
360 | struct stat *st, unsigned int options) | |
b0391890 | 361 | { |
29e4d363 | 362 | int changed, changed_fs; |
4bd5b7da JH |
363 | |
364 | changed = ie_match_stat(istate, ce, st, options); | |
b0391890 JH |
365 | if (!changed) |
366 | return 0; | |
b0391890 JH |
367 | /* |
368 | * If the mode or type has changed, there's no point in trying | |
369 | * to refresh the entry - it's not going to match | |
370 | */ | |
371 | if (changed & (MODE_CHANGED | TYPE_CHANGED)) | |
372 | return changed; | |
373 | ||
c70115b4 JH |
374 | /* |
375 | * Immediately after read-tree or update-index --cacheinfo, | |
376 | * the length field is zero, as we have never even read the | |
377 | * lstat(2) information once, and we cannot trust DATA_CHANGED | |
378 | * returned by ie_match_stat() which in turn was returned by | |
379 | * ce_match_stat_basic() to signal that the filesize of the | |
380 | * blob changed. We have to actually go to the filesystem to | |
381 | * see if the contents match, and if so, should answer "unchanged". | |
382 | * | |
383 | * The logic does not apply to gitlinks, as ce_match_stat_basic() | |
384 | * already has checked the actual HEAD from the filesystem in the | |
385 | * subproject. If ie_match_stat() already said it is different, | |
386 | * then we know it is. | |
b0391890 | 387 | */ |
c70115b4 | 388 | if ((changed & DATA_CHANGED) && |
c21d39d7 | 389 | (S_ISGITLINK(ce->ce_mode) || ce->ce_stat_data.sd_size != 0)) |
b0391890 JH |
390 | return changed; |
391 | ||
29e4d363 JH |
392 | changed_fs = ce_modified_check_fs(ce, st); |
393 | if (changed_fs) | |
394 | return changed | changed_fs; | |
b0391890 JH |
395 | return 0; |
396 | } | |
397 | ||
958ba6c9 LT |
398 | int base_name_compare(const char *name1, int len1, int mode1, |
399 | const char *name2, int len2, int mode2) | |
400 | { | |
401 | unsigned char c1, c2; | |
402 | int len = len1 < len2 ? len1 : len2; | |
403 | int cmp; | |
404 | ||
405 | cmp = memcmp(name1, name2, len); | |
406 | if (cmp) | |
407 | return cmp; | |
408 | c1 = name1[len]; | |
409 | c2 = name2[len]; | |
1833a925 | 410 | if (!c1 && S_ISDIR(mode1)) |
958ba6c9 | 411 | c1 = '/'; |
1833a925 | 412 | if (!c2 && S_ISDIR(mode2)) |
958ba6c9 LT |
413 | c2 = '/'; |
414 | return (c1 < c2) ? -1 : (c1 > c2) ? 1 : 0; | |
415 | } | |
416 | ||
0ab9e1e8 LT |
417 | /* |
418 | * df_name_compare() is identical to base_name_compare(), except it | |
419 | * compares conflicting directory/file entries as equal. Note that | |
420 | * while a directory name compares as equal to a regular file, they | |
421 | * then individually compare _differently_ to a filename that has | |
422 | * a dot after the basename (because '\0' < '.' < '/'). | |
423 | * | |
424 | * This is used by routines that want to traverse the git namespace | |
425 | * but then handle conflicting entries together when possible. | |
426 | */ | |
427 | int df_name_compare(const char *name1, int len1, int mode1, | |
428 | const char *name2, int len2, int mode2) | |
429 | { | |
430 | int len = len1 < len2 ? len1 : len2, cmp; | |
431 | unsigned char c1, c2; | |
432 | ||
433 | cmp = memcmp(name1, name2, len); | |
434 | if (cmp) | |
435 | return cmp; | |
436 | /* Directories and files compare equal (same length, same name) */ | |
437 | if (len1 == len2) | |
438 | return 0; | |
439 | c1 = name1[len]; | |
440 | if (!c1 && S_ISDIR(mode1)) | |
441 | c1 = '/'; | |
442 | c2 = name2[len]; | |
443 | if (!c2 && S_ISDIR(mode2)) | |
444 | c2 = '/'; | |
445 | if (c1 == '/' && !c2) | |
446 | return 0; | |
447 | if (c2 == '/' && !c1) | |
448 | return 0; | |
449 | return c1 - c2; | |
450 | } | |
451 | ||
ccdd4a0f | 452 | int name_compare(const char *name1, size_t len1, const char *name2, size_t len2) |
eb38c22f | 453 | { |
ccdd4a0f JM |
454 | size_t min_len = (len1 < len2) ? len1 : len2; |
455 | int cmp = memcmp(name1, name2, min_len); | |
eb38c22f LT |
456 | if (cmp) |
457 | return cmp; | |
458 | if (len1 < len2) | |
459 | return -1; | |
460 | if (len1 > len2) | |
461 | return 1; | |
ccdd4a0f JM |
462 | return 0; |
463 | } | |
464 | ||
465 | int cache_name_stage_compare(const char *name1, int len1, int stage1, const char *name2, int len2, int stage2) | |
466 | { | |
467 | int cmp; | |
468 | ||
469 | cmp = name_compare(name1, len1, name2, len2); | |
470 | if (cmp) | |
471 | return cmp; | |
5f73076c | 472 | |
b60e188c | 473 | if (stage1 < stage2) |
95fd5bf8 | 474 | return -1; |
b60e188c | 475 | if (stage1 > stage2) |
95fd5bf8 | 476 | return 1; |
eb38c22f LT |
477 | return 0; |
478 | } | |
479 | ||
357e9c69 | 480 | static int index_name_stage_pos(const struct index_state *istate, const char *name, int namelen, int stage) |
eb38c22f LT |
481 | { |
482 | int first, last; | |
483 | ||
484 | first = 0; | |
4aab5b46 | 485 | last = istate->cache_nr; |
eb38c22f LT |
486 | while (last > first) { |
487 | int next = (last + first) >> 1; | |
4aab5b46 | 488 | struct cache_entry *ce = istate->cache[next]; |
b60e188c | 489 | int cmp = cache_name_stage_compare(name, namelen, stage, ce->name, ce_namelen(ce), ce_stage(ce)); |
eb38c22f | 490 | if (!cmp) |
76e7f4ec | 491 | return next; |
eb38c22f LT |
492 | if (cmp < 0) { |
493 | last = next; | |
494 | continue; | |
495 | } | |
496 | first = next+1; | |
497 | } | |
76e7f4ec | 498 | return -first-1; |
eb38c22f LT |
499 | } |
500 | ||
b60e188c TG |
501 | int index_name_pos(const struct index_state *istate, const char *name, int namelen) |
502 | { | |
503 | return index_name_stage_pos(istate, name, namelen, 0); | |
504 | } | |
505 | ||
4aab5b46 | 506 | int remove_index_entry_at(struct index_state *istate, int pos) |
7b937ca3 | 507 | { |
cf558704 LT |
508 | struct cache_entry *ce = istate->cache[pos]; |
509 | ||
cfc5789a | 510 | record_resolve_undo(istate, ce); |
2092678c | 511 | remove_name_hash(istate, ce); |
045113a5 | 512 | save_or_free_index_entry(istate, ce); |
e636a7b4 | 513 | istate->cache_changed |= CE_ENTRY_REMOVED; |
4aab5b46 JH |
514 | istate->cache_nr--; |
515 | if (pos >= istate->cache_nr) | |
7b937ca3 | 516 | return 0; |
4aab5b46 JH |
517 | memmove(istate->cache + pos, |
518 | istate->cache + pos + 1, | |
519 | (istate->cache_nr - pos) * sizeof(struct cache_entry *)); | |
7b937ca3 LT |
520 | return 1; |
521 | } | |
522 | ||
36419c8e | 523 | /* |
98e023de | 524 | * Remove all cache entries marked for removal, that is where |
36419c8e KB |
525 | * CE_REMOVE is set in ce_flags. This is much more effective than |
526 | * calling remove_index_entry_at() for each entry to be removed. | |
527 | */ | |
528 | void remove_marked_cache_entries(struct index_state *istate) | |
529 | { | |
530 | struct cache_entry **ce_array = istate->cache; | |
531 | unsigned int i, j; | |
532 | ||
533 | for (i = j = 0; i < istate->cache_nr; i++) { | |
5699d17e | 534 | if (ce_array[i]->ce_flags & CE_REMOVE) { |
2092678c | 535 | remove_name_hash(istate, ce_array[i]); |
045113a5 | 536 | save_or_free_index_entry(istate, ce_array[i]); |
5699d17e | 537 | } |
36419c8e KB |
538 | else |
539 | ce_array[j++] = ce_array[i]; | |
540 | } | |
ad837d9e NTND |
541 | if (j == istate->cache_nr) |
542 | return; | |
e636a7b4 | 543 | istate->cache_changed |= CE_ENTRY_REMOVED; |
36419c8e KB |
544 | istate->cache_nr = j; |
545 | } | |
546 | ||
4aab5b46 | 547 | int remove_file_from_index(struct index_state *istate, const char *path) |
197ee8c9 | 548 | { |
4aab5b46 | 549 | int pos = index_name_pos(istate, path, strlen(path)); |
c4e3cca1 JH |
550 | if (pos < 0) |
551 | pos = -pos-1; | |
a5400efe | 552 | cache_tree_invalidate_path(istate, path); |
e931371a | 553 | untracked_cache_remove_from_index(istate, path); |
4aab5b46 JH |
554 | while (pos < istate->cache_nr && !strcmp(istate->cache[pos]->name, path)) |
555 | remove_index_entry_at(istate, pos); | |
197ee8c9 LT |
556 | return 0; |
557 | } | |
558 | ||
20314271 JS |
559 | static int compare_name(struct cache_entry *ce, const char *path, int namelen) |
560 | { | |
561 | return namelen != ce_namelen(ce) || memcmp(path, ce->name, namelen); | |
562 | } | |
563 | ||
564 | static int index_name_pos_also_unmerged(struct index_state *istate, | |
565 | const char *path, int namelen) | |
566 | { | |
567 | int pos = index_name_pos(istate, path, namelen); | |
568 | struct cache_entry *ce; | |
569 | ||
570 | if (pos >= 0) | |
571 | return pos; | |
572 | ||
573 | /* maybe unmerged? */ | |
574 | pos = -1 - pos; | |
575 | if (pos >= istate->cache_nr || | |
576 | compare_name((ce = istate->cache[pos]), path, namelen)) | |
577 | return -1; | |
578 | ||
579 | /* order of preference: stage 2, 1, 3 */ | |
580 | if (ce_stage(ce) == 1 && pos + 1 < istate->cache_nr && | |
581 | ce_stage((ce = istate->cache[pos + 1])) == 2 && | |
582 | !compare_name(ce, path, namelen)) | |
583 | pos++; | |
584 | return pos; | |
585 | } | |
586 | ||
1102952b LT |
587 | static int different_name(struct cache_entry *ce, struct cache_entry *alias) |
588 | { | |
589 | int len = ce_namelen(ce); | |
590 | return ce_namelen(alias) != len || memcmp(ce->name, alias->name, len); | |
591 | } | |
592 | ||
593 | /* | |
594 | * If we add a filename that aliases in the cache, we will use the | |
595 | * name that we already have - but we don't want to update the same | |
596 | * alias twice, because that implies that there were actually two | |
597 | * different files with aliasing names! | |
598 | * | |
599 | * So we use the CE_ADDED flag to verify that the alias was an old | |
600 | * one before we accept it as | |
601 | */ | |
045113a5 NTND |
602 | static struct cache_entry *create_alias_ce(struct index_state *istate, |
603 | struct cache_entry *ce, | |
604 | struct cache_entry *alias) | |
1102952b LT |
605 | { |
606 | int len; | |
607 | struct cache_entry *new; | |
608 | ||
609 | if (alias->ce_flags & CE_ADDED) | |
610 | die("Will not add file alias '%s' ('%s' already exists in index)", ce->name, alias->name); | |
611 | ||
612 | /* Ok, create the new entry using the name of the existing alias */ | |
613 | len = ce_namelen(alias); | |
614 | new = xcalloc(1, cache_entry_size(len)); | |
615 | memcpy(new->name, alias->name, len); | |
616 | copy_cache_entry(new, ce); | |
045113a5 | 617 | save_or_free_index_entry(istate, ce); |
1102952b LT |
618 | return new; |
619 | } | |
620 | ||
b4b313f9 | 621 | void set_object_name_for_intent_to_add_entry(struct cache_entry *ce) |
39425819 JH |
622 | { |
623 | unsigned char sha1[20]; | |
624 | if (write_sha1_file("", 0, blob_type, sha1)) | |
625 | die("cannot create an empty blob in the object database"); | |
99d1a986 | 626 | hashcpy(ce->oid.hash, sha1); |
39425819 JH |
627 | } |
628 | ||
610d55af | 629 | int add_to_index(struct index_state *istate, const char *path, struct stat *st, int flags) |
11be42a4 | 630 | { |
38ed1d89 | 631 | int size, namelen, was_same; |
d177cab0 | 632 | mode_t st_mode = st->st_mode; |
6835550d | 633 | struct cache_entry *ce, *alias; |
56cac48c | 634 | unsigned ce_option = CE_MATCH_IGNORE_VALID|CE_MATCH_IGNORE_SKIP_WORKTREE|CE_MATCH_RACY_IS_DIRTY; |
38ed1d89 JH |
635 | int verbose = flags & (ADD_CACHE_VERBOSE | ADD_CACHE_PRETEND); |
636 | int pretend = flags & ADD_CACHE_PRETEND; | |
39425819 JH |
637 | int intent_only = flags & ADD_CACHE_INTENT; |
638 | int add_option = (ADD_CACHE_OK_TO_ADD|ADD_CACHE_OK_TO_REPLACE| | |
639 | (intent_only ? ADD_CACHE_NEW_ONLY : 0)); | |
11be42a4 | 640 | |
d177cab0 | 641 | if (!S_ISREG(st_mode) && !S_ISLNK(st_mode) && !S_ISDIR(st_mode)) |
960b8ad1 | 642 | return error("%s: can only add regular files, symbolic links or git-directories", path); |
11be42a4 JS |
643 | |
644 | namelen = strlen(path); | |
d177cab0 | 645 | if (S_ISDIR(st_mode)) { |
09595258 LT |
646 | while (namelen && path[namelen-1] == '/') |
647 | namelen--; | |
648 | } | |
11be42a4 JS |
649 | size = cache_entry_size(namelen); |
650 | ce = xcalloc(1, size); | |
651 | memcpy(ce->name, path, namelen); | |
b60e188c | 652 | ce->ce_namelen = namelen; |
39425819 JH |
653 | if (!intent_only) |
654 | fill_stat_cache_info(ce, st); | |
388b2acd JH |
655 | else |
656 | ce->ce_flags |= CE_INTENT_TO_ADD; | |
11be42a4 | 657 | |
610d55af TG |
658 | |
659 | if (trust_executable_bit && has_symlinks) { | |
d177cab0 | 660 | ce->ce_mode = create_ce_mode(st_mode); |
610d55af | 661 | } else { |
78a8d641 JS |
662 | /* If there is an existing entry, pick the mode bits and type |
663 | * from it, otherwise assume unexecutable regular file. | |
11be42a4 | 664 | */ |
185c975f | 665 | struct cache_entry *ent; |
20314271 | 666 | int pos = index_name_pos_also_unmerged(istate, path, namelen); |
185c975f | 667 | |
4aab5b46 | 668 | ent = (0 <= pos) ? istate->cache[pos] : NULL; |
d177cab0 | 669 | ce->ce_mode = ce_mode_from_stat(ent, st_mode); |
11be42a4 JS |
670 | } |
671 | ||
dc1ae704 JJ |
672 | /* When core.ignorecase=true, determine if a directory of the same name but differing |
673 | * case already exists within the Git repository. If it does, ensure the directory | |
674 | * case of the file being added to the repository matches (is folded into) the existing | |
675 | * entry's directory case. | |
676 | */ | |
677 | if (ignore_case) { | |
41284eb0 | 678 | adjust_dirname_case(istate, ce->name); |
dc1ae704 JJ |
679 | } |
680 | ||
ebbd7439 | 681 | alias = index_file_exists(istate, ce->name, ce_namelen(ce), ignore_case); |
d177cab0 | 682 | if (alias && !ce_stage(alias) && !ie_match_stat(istate, alias, st, ce_option)) { |
0781b8a9 | 683 | /* Nothing changed, really */ |
125fd984 JH |
684 | if (!S_ISGITLINK(alias->ce_mode)) |
685 | ce_mark_uptodate(alias); | |
1102952b | 686 | alias->ce_flags |= CE_ADDED; |
2d9426b0 SB |
687 | |
688 | free(ce); | |
0781b8a9 JH |
689 | return 0; |
690 | } | |
39425819 | 691 | if (!intent_only) { |
99d1a986 | 692 | if (index_path(ce->oid.hash, path, st, HASH_WRITE_OBJECT)) { |
2d9426b0 | 693 | free(ce); |
39425819 | 694 | return error("unable to index file %s", path); |
2d9426b0 | 695 | } |
39425819 | 696 | } else |
b4b313f9 | 697 | set_object_name_for_intent_to_add_entry(ce); |
39425819 | 698 | |
1102952b | 699 | if (ignore_case && alias && different_name(ce, alias)) |
045113a5 | 700 | ce = create_alias_ce(istate, ce, alias); |
1102952b | 701 | ce->ce_flags |= CE_ADDED; |
38ed1d89 | 702 | |
3bf0dd1f | 703 | /* It was suspected to be racily clean, but it turns out to be Ok */ |
38ed1d89 JH |
704 | was_same = (alias && |
705 | !ce_stage(alias) && | |
99d1a986 | 706 | !oidcmp(&alias->oid, &ce->oid) && |
38ed1d89 JH |
707 | ce->ce_mode == alias->ce_mode); |
708 | ||
709 | if (pretend) | |
067178ed JH |
710 | free(ce); |
711 | else if (add_index_entry(istate, ce, add_option)) { | |
712 | free(ce); | |
713 | return error("unable to add %s to index", path); | |
714 | } | |
38ed1d89 | 715 | if (verbose && !was_same) |
11be42a4 | 716 | printf("add '%s'\n", path); |
11be42a4 JS |
717 | return 0; |
718 | } | |
719 | ||
610d55af | 720 | int add_file_to_index(struct index_state *istate, const char *path, int flags) |
d177cab0 LT |
721 | { |
722 | struct stat st; | |
723 | if (lstat(path, &st)) | |
d824cbba | 724 | die_errno("unable to stat '%s'", path); |
610d55af | 725 | return add_to_index(istate, path, &st, flags); |
d177cab0 LT |
726 | } |
727 | ||
6640f881 CR |
728 | struct cache_entry *make_cache_entry(unsigned int mode, |
729 | const unsigned char *sha1, const char *path, int stage, | |
25762726 | 730 | unsigned int refresh_options) |
6640f881 CR |
731 | { |
732 | int size, len; | |
bc1c2caa | 733 | struct cache_entry *ce, *ret; |
6640f881 | 734 | |
7e7abea9 DP |
735 | if (!verify_path(path)) { |
736 | error("Invalid path '%s'", path); | |
6640f881 | 737 | return NULL; |
7e7abea9 | 738 | } |
6640f881 CR |
739 | |
740 | len = strlen(path); | |
741 | size = cache_entry_size(len); | |
742 | ce = xcalloc(1, size); | |
743 | ||
99d1a986 | 744 | hashcpy(ce->oid.hash, sha1); |
6640f881 | 745 | memcpy(ce->name, path, len); |
b60e188c TG |
746 | ce->ce_flags = create_ce_flags(stage); |
747 | ce->ce_namelen = len; | |
6640f881 CR |
748 | ce->ce_mode = create_ce_mode(mode); |
749 | ||
bc1c2caa | 750 | ret = refresh_cache_entry(ce, refresh_options); |
915e44c6 | 751 | if (ret != ce) |
bc1c2caa | 752 | free(ce); |
915e44c6 | 753 | return ret; |
6640f881 CR |
754 | } |
755 | ||
d9d70966 TG |
756 | /* |
757 | * Chmod an index entry with either +x or -x. | |
758 | * | |
759 | * Returns -1 if the chmod for the particular cache entry failed (if it's | |
760 | * not a regular file), -2 if an invalid flip argument is passed in, 0 | |
761 | * otherwise. | |
762 | */ | |
763 | int chmod_index_entry(struct index_state *istate, struct cache_entry *ce, | |
764 | char flip) | |
765 | { | |
766 | if (!S_ISREG(ce->ce_mode)) | |
767 | return -1; | |
768 | switch (flip) { | |
769 | case '+': | |
770 | ce->ce_mode |= 0111; | |
771 | break; | |
772 | case '-': | |
773 | ce->ce_mode &= ~0111; | |
774 | break; | |
775 | default: | |
776 | return -2; | |
777 | } | |
778 | cache_tree_invalidate_path(istate, ce->name); | |
779 | ce->ce_flags |= CE_UPDATE_IN_BASE; | |
780 | istate->cache_changed |= CE_ENTRY_CHANGED; | |
781 | ||
782 | return 0; | |
783 | } | |
784 | ||
9c5e6c80 | 785 | int ce_same_name(const struct cache_entry *a, const struct cache_entry *b) |
7b937ca3 LT |
786 | { |
787 | int len = ce_namelen(a); | |
788 | return ce_namelen(b) == len && !memcmp(a->name, b->name, len); | |
789 | } | |
790 | ||
8dcf39c4 LT |
791 | /* |
792 | * We fundamentally don't like some paths: we don't want | |
793 | * dot or dot-dot anywhere, and for obvious reasons don't | |
794 | * want to recurse into ".git" either. | |
795 | * | |
796 | * Also, we don't want double slashes or slashes at the | |
797 | * end that can make pathnames ambiguous. | |
798 | */ | |
799 | static int verify_dotfile(const char *rest) | |
800 | { | |
801 | /* | |
802 | * The first character was '.', but that | |
803 | * has already been discarded, we now test | |
804 | * the rest. | |
805 | */ | |
e0f530ff | 806 | |
8dcf39c4 | 807 | /* "." is not allowed */ |
e0f530ff | 808 | if (*rest == '\0' || is_dir_sep(*rest)) |
8dcf39c4 LT |
809 | return 0; |
810 | ||
e0f530ff | 811 | switch (*rest) { |
8dcf39c4 LT |
812 | /* |
813 | * ".git" followed by NUL or slash is bad. This | |
814 | * shares the path end test with the ".." case. | |
815 | */ | |
816 | case 'g': | |
cc2fc7c2 JK |
817 | case 'G': |
818 | if (rest[1] != 'i' && rest[1] != 'I') | |
8dcf39c4 | 819 | break; |
cc2fc7c2 | 820 | if (rest[2] != 't' && rest[2] != 'T') |
8dcf39c4 LT |
821 | break; |
822 | rest += 2; | |
823 | /* fallthrough */ | |
824 | case '.': | |
e0f530ff | 825 | if (rest[1] == '\0' || is_dir_sep(rest[1])) |
8dcf39c4 LT |
826 | return 0; |
827 | } | |
828 | return 1; | |
829 | } | |
830 | ||
831 | int verify_path(const char *path) | |
832 | { | |
833 | char c; | |
834 | ||
56948cb6 EFL |
835 | if (has_dos_drive_prefix(path)) |
836 | return 0; | |
837 | ||
8dcf39c4 LT |
838 | goto inside; |
839 | for (;;) { | |
840 | if (!c) | |
841 | return 1; | |
56948cb6 | 842 | if (is_dir_sep(c)) { |
8dcf39c4 | 843 | inside: |
a42643aa JK |
844 | if (protect_hfs && is_hfs_dotgit(path)) |
845 | return 0; | |
2b4c6efc JS |
846 | if (protect_ntfs && is_ntfs_dotgit(path)) |
847 | return 0; | |
8dcf39c4 | 848 | c = *path++; |
3bdf09c7 JH |
849 | if ((c == '.' && !verify_dotfile(path)) || |
850 | is_dir_sep(c) || c == '\0') | |
851 | return 0; | |
8dcf39c4 LT |
852 | } |
853 | c = *path++; | |
854 | } | |
855 | } | |
856 | ||
12676608 LT |
857 | /* |
858 | * Do we have another file that has the beginning components being a | |
859 | * proper superset of the name we're trying to add? | |
0f1e4f04 | 860 | */ |
4aab5b46 JH |
861 | static int has_file_name(struct index_state *istate, |
862 | const struct cache_entry *ce, int pos, int ok_to_replace) | |
0f1e4f04 | 863 | { |
12676608 LT |
864 | int retval = 0; |
865 | int len = ce_namelen(ce); | |
b155725d | 866 | int stage = ce_stage(ce); |
12676608 | 867 | const char *name = ce->name; |
0f1e4f04 | 868 | |
4aab5b46 JH |
869 | while (pos < istate->cache_nr) { |
870 | struct cache_entry *p = istate->cache[pos++]; | |
0f1e4f04 | 871 | |
12676608 | 872 | if (len >= ce_namelen(p)) |
0f1e4f04 | 873 | break; |
12676608 LT |
874 | if (memcmp(name, p->name, len)) |
875 | break; | |
b155725d JH |
876 | if (ce_stage(p) != stage) |
877 | continue; | |
12676608 LT |
878 | if (p->name[len] != '/') |
879 | continue; | |
7a51ed66 | 880 | if (p->ce_flags & CE_REMOVE) |
21cd8d00 | 881 | continue; |
12676608 LT |
882 | retval = -1; |
883 | if (!ok_to_replace) | |
884 | break; | |
4aab5b46 | 885 | remove_index_entry_at(istate, --pos); |
0f1e4f04 | 886 | } |
12676608 LT |
887 | return retval; |
888 | } | |
0f1e4f04 | 889 | |
12676608 LT |
890 | /* |
891 | * Do we have another file with a pathname that is a proper | |
892 | * subset of the name we're trying to add? | |
893 | */ | |
4aab5b46 JH |
894 | static int has_dir_name(struct index_state *istate, |
895 | const struct cache_entry *ce, int pos, int ok_to_replace) | |
12676608 LT |
896 | { |
897 | int retval = 0; | |
b155725d | 898 | int stage = ce_stage(ce); |
12676608 LT |
899 | const char *name = ce->name; |
900 | const char *slash = name + ce_namelen(ce); | |
0f1e4f04 | 901 | |
12676608 LT |
902 | for (;;) { |
903 | int len; | |
0f1e4f04 | 904 | |
12676608 LT |
905 | for (;;) { |
906 | if (*--slash == '/') | |
907 | break; | |
908 | if (slash <= ce->name) | |
909 | return retval; | |
910 | } | |
911 | len = slash - name; | |
0f1e4f04 | 912 | |
b60e188c | 913 | pos = index_name_stage_pos(istate, name, len, stage); |
12676608 | 914 | if (pos >= 0) { |
21cd8d00 JH |
915 | /* |
916 | * Found one, but not so fast. This could | |
917 | * be a marker that says "I was here, but | |
918 | * I am being removed". Such an entry is | |
919 | * not a part of the resulting tree, and | |
920 | * it is Ok to have a directory at the same | |
921 | * path. | |
922 | */ | |
077c48df | 923 | if (!(istate->cache[pos]->ce_flags & CE_REMOVE)) { |
21cd8d00 JH |
924 | retval = -1; |
925 | if (!ok_to_replace) | |
926 | break; | |
4aab5b46 | 927 | remove_index_entry_at(istate, pos); |
21cd8d00 JH |
928 | continue; |
929 | } | |
12676608 | 930 | } |
21cd8d00 JH |
931 | else |
932 | pos = -pos-1; | |
12676608 LT |
933 | |
934 | /* | |
935 | * Trivial optimization: if we find an entry that | |
936 | * already matches the sub-directory, then we know | |
b155725d | 937 | * we're ok, and we can exit. |
12676608 | 938 | */ |
4aab5b46 JH |
939 | while (pos < istate->cache_nr) { |
940 | struct cache_entry *p = istate->cache[pos]; | |
b155725d JH |
941 | if ((ce_namelen(p) <= len) || |
942 | (p->name[len] != '/') || | |
943 | memcmp(p->name, name, len)) | |
944 | break; /* not our subdirectory */ | |
077c48df JH |
945 | if (ce_stage(p) == stage && !(p->ce_flags & CE_REMOVE)) |
946 | /* | |
947 | * p is at the same stage as our entry, and | |
b155725d JH |
948 | * is a subdirectory of what we are looking |
949 | * at, so we cannot have conflicts at our | |
950 | * level or anything shorter. | |
951 | */ | |
952 | return retval; | |
953 | pos++; | |
192268c1 | 954 | } |
0f1e4f04 | 955 | } |
12676608 LT |
956 | return retval; |
957 | } | |
958 | ||
959 | /* We may be in a situation where we already have path/file and path | |
960 | * is being added, or we already have path and path/file is being | |
961 | * added. Either one would result in a nonsense tree that has path | |
962 | * twice when git-write-tree tries to write it out. Prevent it. | |
a6080a0a | 963 | * |
12676608 LT |
964 | * If ok-to-replace is specified, we remove the conflicting entries |
965 | * from the cache so the caller should recompute the insert position. | |
966 | * When this happens, we return non-zero. | |
967 | */ | |
4aab5b46 JH |
968 | static int check_file_directory_conflict(struct index_state *istate, |
969 | const struct cache_entry *ce, | |
970 | int pos, int ok_to_replace) | |
12676608 | 971 | { |
21cd8d00 JH |
972 | int retval; |
973 | ||
974 | /* | |
975 | * When ce is an "I am going away" entry, we allow it to be added | |
976 | */ | |
7a51ed66 | 977 | if (ce->ce_flags & CE_REMOVE) |
21cd8d00 JH |
978 | return 0; |
979 | ||
12676608 LT |
980 | /* |
981 | * We check if the path is a sub-path of a subsequent pathname | |
982 | * first, since removing those will not change the position | |
21cd8d00 | 983 | * in the array. |
12676608 | 984 | */ |
4aab5b46 | 985 | retval = has_file_name(istate, ce, pos, ok_to_replace); |
21cd8d00 | 986 | |
12676608 LT |
987 | /* |
988 | * Then check if the path might have a clashing sub-directory | |
989 | * before it. | |
990 | */ | |
4aab5b46 | 991 | return retval + has_dir_name(istate, ce, pos, ok_to_replace); |
0f1e4f04 JH |
992 | } |
993 | ||
af3785dc | 994 | static int add_index_entry_with_check(struct index_state *istate, struct cache_entry *ce, int option) |
197ee8c9 LT |
995 | { |
996 | int pos; | |
192268c1 JH |
997 | int ok_to_add = option & ADD_CACHE_OK_TO_ADD; |
998 | int ok_to_replace = option & ADD_CACHE_OK_TO_REPLACE; | |
b155725d | 999 | int skip_df_check = option & ADD_CACHE_SKIP_DFCHECK; |
39425819 | 1000 | int new_only = option & ADD_CACHE_NEW_ONLY; |
5f73076c | 1001 | |
ce7c614b NTND |
1002 | if (!(option & ADD_CACHE_KEEP_CACHE_TREE)) |
1003 | cache_tree_invalidate_path(istate, ce->name); | |
b60e188c | 1004 | pos = index_name_stage_pos(istate, ce->name, ce_namelen(ce), ce_stage(ce)); |
197ee8c9 | 1005 | |
3e09cdfd | 1006 | /* existing match? Just replace it. */ |
76e7f4ec | 1007 | if (pos >= 0) { |
39425819 JH |
1008 | if (!new_only) |
1009 | replace_index_entry(istate, pos, ce); | |
197ee8c9 LT |
1010 | return 0; |
1011 | } | |
76e7f4ec | 1012 | pos = -pos-1; |
197ee8c9 | 1013 | |
ffcc9ba7 NTND |
1014 | if (!(option & ADD_CACHE_KEEP_CACHE_TREE)) |
1015 | untracked_cache_add_to_index(istate, ce->name); | |
e931371a | 1016 | |
7b937ca3 LT |
1017 | /* |
1018 | * Inserting a merged entry ("stage 0") into the index | |
1019 | * will always replace all non-merged entries.. | |
1020 | */ | |
4aab5b46 JH |
1021 | if (pos < istate->cache_nr && ce_stage(ce) == 0) { |
1022 | while (ce_same_name(istate->cache[pos], ce)) { | |
7b937ca3 | 1023 | ok_to_add = 1; |
4aab5b46 | 1024 | if (!remove_index_entry_at(istate, pos)) |
7b937ca3 LT |
1025 | break; |
1026 | } | |
1027 | } | |
1028 | ||
121481ab LT |
1029 | if (!ok_to_add) |
1030 | return -1; | |
8dcf39c4 | 1031 | if (!verify_path(ce->name)) |
7e7abea9 | 1032 | return error("Invalid path '%s'", ce->name); |
121481ab | 1033 | |
3e09cdfd | 1034 | if (!skip_df_check && |
4aab5b46 | 1035 | check_file_directory_conflict(istate, ce, pos, ok_to_replace)) { |
192268c1 | 1036 | if (!ok_to_replace) |
4aab5b46 JH |
1037 | return error("'%s' appears as both a file and as a directory", |
1038 | ce->name); | |
b60e188c | 1039 | pos = index_name_stage_pos(istate, ce->name, ce_namelen(ce), ce_stage(ce)); |
192268c1 JH |
1040 | pos = -pos-1; |
1041 | } | |
af3785dc JH |
1042 | return pos + 1; |
1043 | } | |
1044 | ||
1045 | int add_index_entry(struct index_state *istate, struct cache_entry *ce, int option) | |
1046 | { | |
1047 | int pos; | |
1048 | ||
1049 | if (option & ADD_CACHE_JUST_APPEND) | |
1050 | pos = istate->cache_nr; | |
1051 | else { | |
1052 | int ret; | |
1053 | ret = add_index_entry_with_check(istate, ce, option); | |
1054 | if (ret <= 0) | |
1055 | return ret; | |
1056 | pos = ret - 1; | |
1057 | } | |
0f1e4f04 | 1058 | |
197ee8c9 | 1059 | /* Make sure the array is big enough .. */ |
999f5660 | 1060 | ALLOC_GROW(istate->cache, istate->cache_nr + 1, istate->cache_alloc); |
197ee8c9 LT |
1061 | |
1062 | /* Add it in.. */ | |
4aab5b46 | 1063 | istate->cache_nr++; |
af3785dc | 1064 | if (istate->cache_nr > pos + 1) |
4aab5b46 JH |
1065 | memmove(istate->cache + pos + 1, |
1066 | istate->cache + pos, | |
1067 | (istate->cache_nr - pos - 1) * sizeof(ce)); | |
cf558704 | 1068 | set_index_entry(istate, pos, ce); |
e636a7b4 | 1069 | istate->cache_changed |= CE_ENTRY_ADDED; |
197ee8c9 LT |
1070 | return 0; |
1071 | } | |
1072 | ||
405e5b2f LT |
1073 | /* |
1074 | * "refresh" does not calculate a new sha1 file or bring the | |
1075 | * cache up-to-date for mode/content changes. But what it | |
1076 | * _does_ do is to "re-match" the stat information of a file | |
1077 | * with the cache, so that you can refresh the cache for a | |
1078 | * file that hasn't been changed but where the stat entry is | |
1079 | * out of date. | |
1080 | * | |
1081 | * For example, you'd want to do this after doing a "git-read-tree", | |
1082 | * to link up the stat cache details with the proper files. | |
1083 | */ | |
4aab5b46 | 1084 | static struct cache_entry *refresh_cache_ent(struct index_state *istate, |
4bd5b7da | 1085 | struct cache_entry *ce, |
d05e6970 JK |
1086 | unsigned int options, int *err, |
1087 | int *changed_ret) | |
405e5b2f LT |
1088 | { |
1089 | struct stat st; | |
1090 | struct cache_entry *updated; | |
1091 | int changed, size; | |
25762726 | 1092 | int refresh = options & CE_MATCH_REFRESH; |
4bd5b7da | 1093 | int ignore_valid = options & CE_MATCH_IGNORE_VALID; |
56cac48c | 1094 | int ignore_skip_worktree = options & CE_MATCH_IGNORE_SKIP_WORKTREE; |
2e2e7ec1 | 1095 | int ignore_missing = options & CE_MATCH_IGNORE_MISSING; |
405e5b2f | 1096 | |
25762726 | 1097 | if (!refresh || ce_uptodate(ce)) |
eadb5831 JH |
1098 | return ce; |
1099 | ||
aa9349d4 | 1100 | /* |
56cac48c NTND |
1101 | * CE_VALID or CE_SKIP_WORKTREE means the user promised us |
1102 | * that the change to the work tree does not matter and told | |
1103 | * us not to worry. | |
aa9349d4 | 1104 | */ |
56cac48c NTND |
1105 | if (!ignore_skip_worktree && ce_skip_worktree(ce)) { |
1106 | ce_mark_uptodate(ce); | |
1107 | return ce; | |
1108 | } | |
aa9349d4 MSO |
1109 | if (!ignore_valid && (ce->ce_flags & CE_VALID)) { |
1110 | ce_mark_uptodate(ce); | |
1111 | return ce; | |
1112 | } | |
1113 | ||
ccad42d4 RS |
1114 | if (has_symlink_leading_path(ce->name, ce_namelen(ce))) { |
1115 | if (ignore_missing) | |
1116 | return ce; | |
1117 | if (err) | |
1118 | *err = ENOENT; | |
1119 | return NULL; | |
1120 | } | |
1121 | ||
8fd2cb40 | 1122 | if (lstat(ce->name, &st) < 0) { |
2e2e7ec1 BK |
1123 | if (ignore_missing && errno == ENOENT) |
1124 | return ce; | |
ec0cc704 JH |
1125 | if (err) |
1126 | *err = errno; | |
8fd2cb40 JS |
1127 | return NULL; |
1128 | } | |
405e5b2f | 1129 | |
4bd5b7da | 1130 | changed = ie_match_stat(istate, ce, &st, options); |
d05e6970 JK |
1131 | if (changed_ret) |
1132 | *changed_ret = changed; | |
405e5b2f | 1133 | if (!changed) { |
4bd5b7da JH |
1134 | /* |
1135 | * The path is unchanged. If we were told to ignore | |
1136 | * valid bit, then we did the actual stat check and | |
1137 | * found that the entry is unmodified. If the entry | |
1138 | * is not marked VALID, this is the place to mark it | |
1139 | * valid again, under "assume unchanged" mode. | |
1140 | */ | |
1141 | if (ignore_valid && assume_unchanged && | |
7a51ed66 | 1142 | !(ce->ce_flags & CE_VALID)) |
405e5b2f | 1143 | ; /* mark this one VALID again */ |
eadb5831 JH |
1144 | else { |
1145 | /* | |
1146 | * We do not mark the index itself "modified" | |
1147 | * because CE_UPTODATE flag is in-core only; | |
1148 | * we are not going to write this change out. | |
1149 | */ | |
125fd984 JH |
1150 | if (!S_ISGITLINK(ce->ce_mode)) |
1151 | ce_mark_uptodate(ce); | |
8fd2cb40 | 1152 | return ce; |
eadb5831 | 1153 | } |
405e5b2f LT |
1154 | } |
1155 | ||
4bd5b7da | 1156 | if (ie_modified(istate, ce, &st, options)) { |
ec0cc704 JH |
1157 | if (err) |
1158 | *err = EINVAL; | |
8fd2cb40 JS |
1159 | return NULL; |
1160 | } | |
405e5b2f LT |
1161 | |
1162 | size = ce_size(ce); | |
1163 | updated = xmalloc(size); | |
1164 | memcpy(updated, ce, size); | |
1165 | fill_stat_cache_info(updated, &st); | |
4bd5b7da JH |
1166 | /* |
1167 | * If ignore_valid is not set, we should leave CE_VALID bit | |
1168 | * alone. Otherwise, paths marked with --no-assume-unchanged | |
1169 | * (i.e. things to be edited) will reacquire CE_VALID bit | |
1170 | * automatically, which is not really what we want. | |
405e5b2f | 1171 | */ |
4bd5b7da | 1172 | if (!ignore_valid && assume_unchanged && |
7a51ed66 LT |
1173 | !(ce->ce_flags & CE_VALID)) |
1174 | updated->ce_flags &= ~CE_VALID; | |
405e5b2f | 1175 | |
e636a7b4 | 1176 | /* istate->cache_changed is updated in the caller */ |
405e5b2f LT |
1177 | return updated; |
1178 | } | |
1179 | ||
3deffc52 | 1180 | static void show_file(const char * fmt, const char * name, int in_porcelain, |
046613c5 | 1181 | int * first, const char *header_msg) |
3deffc52 MM |
1182 | { |
1183 | if (in_porcelain && *first && header_msg) { | |
1184 | printf("%s\n", header_msg); | |
cd2b8ae9 | 1185 | *first = 0; |
3deffc52 MM |
1186 | } |
1187 | printf(fmt, name); | |
1188 | } | |
1189 | ||
9b2d6149 NTND |
1190 | int refresh_index(struct index_state *istate, unsigned int flags, |
1191 | const struct pathspec *pathspec, | |
046613c5 | 1192 | char *seen, const char *header_msg) |
405e5b2f LT |
1193 | { |
1194 | int i; | |
1195 | int has_errors = 0; | |
1196 | int really = (flags & REFRESH_REALLY) != 0; | |
1197 | int allow_unmerged = (flags & REFRESH_UNMERGED) != 0; | |
1198 | int quiet = (flags & REFRESH_QUIET) != 0; | |
1199 | int not_new = (flags & REFRESH_IGNORE_MISSING) != 0; | |
5fdeacb0 | 1200 | int ignore_submodules = (flags & REFRESH_IGNORE_SUBMODULES) != 0; |
3deffc52 MM |
1201 | int first = 1; |
1202 | int in_porcelain = (flags & REFRESH_IN_PORCELAIN); | |
25762726 BK |
1203 | unsigned int options = (CE_MATCH_REFRESH | |
1204 | (really ? CE_MATCH_IGNORE_VALID : 0) | | |
2e2e7ec1 | 1205 | (not_new ? CE_MATCH_IGNORE_MISSING : 0)); |
4bd4e730 | 1206 | const char *modified_fmt; |
73b7eae6 JK |
1207 | const char *deleted_fmt; |
1208 | const char *typechange_fmt; | |
1209 | const char *added_fmt; | |
4bd4e730 | 1210 | const char *unmerged_fmt; |
405e5b2f | 1211 | |
4bd4e730 | 1212 | modified_fmt = (in_porcelain ? "M\t%s\n" : "%s: needs update\n"); |
73b7eae6 JK |
1213 | deleted_fmt = (in_porcelain ? "D\t%s\n" : "%s: needs update\n"); |
1214 | typechange_fmt = (in_porcelain ? "T\t%s\n" : "%s needs update\n"); | |
1215 | added_fmt = (in_porcelain ? "A\t%s\n" : "%s needs update\n"); | |
4bd4e730 | 1216 | unmerged_fmt = (in_porcelain ? "U\t%s\n" : "%s: needs merge\n"); |
4aab5b46 | 1217 | for (i = 0; i < istate->cache_nr; i++) { |
405e5b2f | 1218 | struct cache_entry *ce, *new; |
ec0cc704 | 1219 | int cache_errno = 0; |
73b7eae6 | 1220 | int changed = 0; |
3d1f148c | 1221 | int filtered = 0; |
ec0cc704 | 1222 | |
4aab5b46 | 1223 | ce = istate->cache[i]; |
5fdeacb0 JS |
1224 | if (ignore_submodules && S_ISGITLINK(ce->ce_mode)) |
1225 | continue; | |
1226 | ||
429bb40a | 1227 | if (pathspec && !ce_path_match(ce, pathspec, seen)) |
3d1f148c JH |
1228 | filtered = 1; |
1229 | ||
405e5b2f | 1230 | if (ce_stage(ce)) { |
4aab5b46 JH |
1231 | while ((i < istate->cache_nr) && |
1232 | ! strcmp(istate->cache[i]->name, ce->name)) | |
405e5b2f LT |
1233 | i++; |
1234 | i--; | |
1235 | if (allow_unmerged) | |
1236 | continue; | |
3d1f148c JH |
1237 | if (!filtered) |
1238 | show_file(unmerged_fmt, ce->name, in_porcelain, | |
1239 | &first, header_msg); | |
405e5b2f LT |
1240 | has_errors = 1; |
1241 | continue; | |
1242 | } | |
1243 | ||
3d1f148c | 1244 | if (filtered) |
d616813d AJ |
1245 | continue; |
1246 | ||
73b7eae6 | 1247 | new = refresh_cache_ent(istate, ce, options, &cache_errno, &changed); |
8fd2cb40 | 1248 | if (new == ce) |
405e5b2f | 1249 | continue; |
8fd2cb40 | 1250 | if (!new) { |
73b7eae6 JK |
1251 | const char *fmt; |
1252 | ||
8fd2cb40 | 1253 | if (really && cache_errno == EINVAL) { |
405e5b2f LT |
1254 | /* If we are doing --really-refresh that |
1255 | * means the index is not valid anymore. | |
1256 | */ | |
7a51ed66 | 1257 | ce->ce_flags &= ~CE_VALID; |
078a58e8 | 1258 | ce->ce_flags |= CE_UPDATE_IN_BASE; |
e636a7b4 | 1259 | istate->cache_changed |= CE_ENTRY_CHANGED; |
405e5b2f LT |
1260 | } |
1261 | if (quiet) | |
1262 | continue; | |
73b7eae6 JK |
1263 | |
1264 | if (cache_errno == ENOENT) | |
1265 | fmt = deleted_fmt; | |
895ff3b2 | 1266 | else if (ce_intent_to_add(ce)) |
73b7eae6 JK |
1267 | fmt = added_fmt; /* must be before other checks */ |
1268 | else if (changed & TYPE_CHANGED) | |
1269 | fmt = typechange_fmt; | |
1270 | else | |
1271 | fmt = modified_fmt; | |
1272 | show_file(fmt, | |
1273 | ce->name, in_porcelain, &first, header_msg); | |
405e5b2f LT |
1274 | has_errors = 1; |
1275 | continue; | |
1276 | } | |
cf558704 LT |
1277 | |
1278 | replace_index_entry(istate, i, new); | |
405e5b2f LT |
1279 | } |
1280 | return has_errors; | |
1281 | } | |
1282 | ||
1335d76e | 1283 | struct cache_entry *refresh_cache_entry(struct cache_entry *ce, |
25762726 | 1284 | unsigned int options) |
ec0cc704 | 1285 | { |
25762726 | 1286 | return refresh_cache_ent(&the_index, ce, options, NULL, NULL); |
ec0cc704 JH |
1287 | } |
1288 | ||
db3b313c JH |
1289 | |
1290 | /***************************************************************** | |
1291 | * Index File I/O | |
1292 | *****************************************************************/ | |
1293 | ||
9d227781 JH |
1294 | #define INDEX_FORMAT_DEFAULT 3 |
1295 | ||
136347d7 TG |
1296 | static unsigned int get_index_format_default(void) |
1297 | { | |
1298 | char *envversion = getenv("GIT_INDEX_VERSION"); | |
3c09d684 | 1299 | char *endp; |
b27a5720 | 1300 | int value; |
3c09d684 TG |
1301 | unsigned int version = INDEX_FORMAT_DEFAULT; |
1302 | ||
136347d7 | 1303 | if (!envversion) { |
b27a5720 TA |
1304 | if (!git_config_get_int("index.version", &value)) |
1305 | version = value; | |
3c09d684 TG |
1306 | if (version < INDEX_FORMAT_LB || INDEX_FORMAT_UB < version) { |
1307 | warning(_("index.version set, but the value is invalid.\n" | |
136347d7 | 1308 | "Using version %i"), INDEX_FORMAT_DEFAULT); |
3c09d684 | 1309 | return INDEX_FORMAT_DEFAULT; |
136347d7 TG |
1310 | } |
1311 | return version; | |
1312 | } | |
3c09d684 TG |
1313 | |
1314 | version = strtoul(envversion, &endp, 10); | |
1315 | if (*endp || | |
1316 | version < INDEX_FORMAT_LB || INDEX_FORMAT_UB < version) { | |
1317 | warning(_("GIT_INDEX_VERSION set, but the value is invalid.\n" | |
1318 | "Using version %i"), INDEX_FORMAT_DEFAULT); | |
1319 | version = INDEX_FORMAT_DEFAULT; | |
1320 | } | |
1321 | return version; | |
136347d7 TG |
1322 | } |
1323 | ||
db3b313c JH |
1324 | /* |
1325 | * dev/ino/uid/gid/size are also just tracked to the low 32 bits | |
1326 | * Again - this is just a (very strong in practice) heuristic that | |
1327 | * the inode hasn't changed. | |
1328 | * | |
1329 | * We save the fields in big-endian order to allow using the | |
1330 | * index file over NFS transparently. | |
1331 | */ | |
1332 | struct ondisk_cache_entry { | |
1333 | struct cache_time ctime; | |
1334 | struct cache_time mtime; | |
7800c1eb TG |
1335 | uint32_t dev; |
1336 | uint32_t ino; | |
1337 | uint32_t mode; | |
1338 | uint32_t uid; | |
1339 | uint32_t gid; | |
1340 | uint32_t size; | |
db3b313c | 1341 | unsigned char sha1[20]; |
7800c1eb | 1342 | uint16_t flags; |
db3b313c JH |
1343 | char name[FLEX_ARRAY]; /* more */ |
1344 | }; | |
1345 | ||
1346 | /* | |
1347 | * This struct is used when CE_EXTENDED bit is 1 | |
1348 | * The struct must match ondisk_cache_entry exactly from | |
1349 | * ctime till flags | |
1350 | */ | |
1351 | struct ondisk_cache_entry_extended { | |
1352 | struct cache_time ctime; | |
1353 | struct cache_time mtime; | |
7800c1eb TG |
1354 | uint32_t dev; |
1355 | uint32_t ino; | |
1356 | uint32_t mode; | |
1357 | uint32_t uid; | |
1358 | uint32_t gid; | |
1359 | uint32_t size; | |
db3b313c | 1360 | unsigned char sha1[20]; |
7800c1eb TG |
1361 | uint16_t flags; |
1362 | uint16_t flags2; | |
db3b313c JH |
1363 | char name[FLEX_ARRAY]; /* more */ |
1364 | }; | |
1365 | ||
6c9cd161 | 1366 | /* These are only used for v3 or lower */ |
db3b313c JH |
1367 | #define align_flex_name(STRUCT,len) ((offsetof(struct STRUCT,name) + (len) + 8) & ~7) |
1368 | #define ondisk_cache_entry_size(len) align_flex_name(ondisk_cache_entry,len) | |
1369 | #define ondisk_cache_entry_extended_size(len) align_flex_name(ondisk_cache_entry_extended,len) | |
1370 | #define ondisk_ce_size(ce) (((ce)->ce_flags & CE_EXTENDED) ? \ | |
1371 | ondisk_cache_entry_extended_size(ce_namelen(ce)) : \ | |
1372 | ondisk_cache_entry_size(ce_namelen(ce))) | |
1373 | ||
bad68ec9 | 1374 | static int verify_hdr(struct cache_header *hdr, unsigned long size) |
e83c5163 | 1375 | { |
9126f009 | 1376 | git_SHA_CTX c; |
bad68ec9 | 1377 | unsigned char sha1[20]; |
0136bac9 | 1378 | int hdr_version; |
e83c5163 | 1379 | |
ccc4feb5 | 1380 | if (hdr->hdr_signature != htonl(CACHE_SIGNATURE)) |
e83c5163 | 1381 | return error("bad signature"); |
0136bac9 | 1382 | hdr_version = ntohl(hdr->hdr_version); |
b82a7b5b | 1383 | if (hdr_version < INDEX_FORMAT_LB || INDEX_FORMAT_UB < hdr_version) |
0136bac9 | 1384 | return error("bad index version %d", hdr_version); |
9126f009 NP |
1385 | git_SHA1_Init(&c); |
1386 | git_SHA1_Update(&c, hdr, size - 20); | |
1387 | git_SHA1_Final(sha1, &c); | |
a89fccd2 | 1388 | if (hashcmp(sha1, (unsigned char *)hdr + size - 20)) |
ca9be054 | 1389 | return error("bad index file sha1 signature"); |
e83c5163 LT |
1390 | return 0; |
1391 | } | |
1392 | ||
4aab5b46 JH |
1393 | static int read_index_extension(struct index_state *istate, |
1394 | const char *ext, void *data, unsigned long sz) | |
bad68ec9 JH |
1395 | { |
1396 | switch (CACHE_EXT(ext)) { | |
1397 | case CACHE_EXT_TREE: | |
4aab5b46 | 1398 | istate->cache_tree = cache_tree_read(data, sz); |
bad68ec9 | 1399 | break; |
cfc5789a JH |
1400 | case CACHE_EXT_RESOLVE_UNDO: |
1401 | istate->resolve_undo = resolve_undo_read(data, sz); | |
1402 | break; | |
5fc2fc8f NTND |
1403 | case CACHE_EXT_LINK: |
1404 | if (read_link_extension(istate, data, sz)) | |
1405 | return -1; | |
1406 | break; | |
f9e6c649 NTND |
1407 | case CACHE_EXT_UNTRACKED: |
1408 | istate->untracked = read_untracked_extension(data, sz); | |
1409 | break; | |
bad68ec9 JH |
1410 | default: |
1411 | if (*ext < 'A' || 'Z' < *ext) | |
1412 | return error("index uses %.4s extension, which we do not understand", | |
1413 | ext); | |
1414 | fprintf(stderr, "ignoring %.4s extension\n", ext); | |
1415 | break; | |
1416 | } | |
1417 | return 0; | |
1418 | } | |
1419 | ||
b3e83cc7 | 1420 | int hold_locked_index(struct lock_file *lk, int lock_flags) |
216aab1e | 1421 | { |
b3e83cc7 | 1422 | return hold_lock_file_for_update(lk, get_index_file(), lock_flags); |
216aab1e MH |
1423 | } |
1424 | ||
4aab5b46 | 1425 | int read_index(struct index_state *istate) |
8fd2cb40 | 1426 | { |
4aab5b46 | 1427 | return read_index_from(istate, get_index_file()); |
8fd2cb40 JS |
1428 | } |
1429 | ||
3fc22b53 JH |
1430 | static struct cache_entry *cache_entry_from_ondisk(struct ondisk_cache_entry *ondisk, |
1431 | unsigned int flags, | |
1432 | const char *name, | |
1433 | size_t len) | |
1434 | { | |
1435 | struct cache_entry *ce = xmalloc(cache_entry_size(len)); | |
1436 | ||
c3d8da57 JK |
1437 | ce->ce_stat_data.sd_ctime.sec = get_be32(&ondisk->ctime.sec); |
1438 | ce->ce_stat_data.sd_mtime.sec = get_be32(&ondisk->mtime.sec); | |
1439 | ce->ce_stat_data.sd_ctime.nsec = get_be32(&ondisk->ctime.nsec); | |
1440 | ce->ce_stat_data.sd_mtime.nsec = get_be32(&ondisk->mtime.nsec); | |
1441 | ce->ce_stat_data.sd_dev = get_be32(&ondisk->dev); | |
1442 | ce->ce_stat_data.sd_ino = get_be32(&ondisk->ino); | |
1443 | ce->ce_mode = get_be32(&ondisk->mode); | |
1444 | ce->ce_stat_data.sd_uid = get_be32(&ondisk->uid); | |
1445 | ce->ce_stat_data.sd_gid = get_be32(&ondisk->gid); | |
1446 | ce->ce_stat_data.sd_size = get_be32(&ondisk->size); | |
b60e188c TG |
1447 | ce->ce_flags = flags & ~CE_NAMEMASK; |
1448 | ce->ce_namelen = len; | |
5fc2fc8f | 1449 | ce->index = 0; |
99d1a986 | 1450 | hashcpy(ce->oid.hash, ondisk->sha1); |
3fc22b53 JH |
1451 | memcpy(ce->name, name, len); |
1452 | ce->name[len] = '\0'; | |
1453 | return ce; | |
1454 | } | |
1455 | ||
6c9cd161 JH |
1456 | /* |
1457 | * Adjacent cache entries tend to share the leading paths, so it makes | |
1458 | * sense to only store the differences in later entries. In the v4 | |
1459 | * on-disk format of the index, each on-disk cache entry stores the | |
1460 | * number of bytes to be stripped from the end of the previous name, | |
1461 | * and the bytes to append to the result, to come up with its name. | |
1462 | */ | |
1463 | static unsigned long expand_name_field(struct strbuf *name, const char *cp_) | |
1464 | { | |
1465 | const unsigned char *ep, *cp = (const unsigned char *)cp_; | |
1466 | size_t len = decode_varint(&cp); | |
1467 | ||
1468 | if (name->len < len) | |
1469 | die("malformed name field in the index"); | |
1470 | strbuf_remove(name, name->len - len, len); | |
1471 | for (ep = cp; *ep; ep++) | |
1472 | ; /* find the end */ | |
1473 | strbuf_add(name, cp, ep - cp); | |
1474 | return (const char *)ep + 1 - cp_; | |
1475 | } | |
1476 | ||
936f53d0 | 1477 | static struct cache_entry *create_from_disk(struct ondisk_cache_entry *ondisk, |
6c9cd161 JH |
1478 | unsigned long *ent_size, |
1479 | struct strbuf *previous_name) | |
7a51ed66 | 1480 | { |
debed2a6 | 1481 | struct cache_entry *ce; |
7fec10b7 | 1482 | size_t len; |
06aaaa0b | 1483 | const char *name; |
debed2a6 | 1484 | unsigned int flags; |
7fec10b7 | 1485 | |
7a51ed66 | 1486 | /* On-disk flags are just 16 bits */ |
c3d8da57 | 1487 | flags = get_be16(&ondisk->flags); |
debed2a6 | 1488 | len = flags & CE_NAMEMASK; |
7fec10b7 | 1489 | |
debed2a6 | 1490 | if (flags & CE_EXTENDED) { |
06aaaa0b NTND |
1491 | struct ondisk_cache_entry_extended *ondisk2; |
1492 | int extended_flags; | |
1493 | ondisk2 = (struct ondisk_cache_entry_extended *)ondisk; | |
c3d8da57 | 1494 | extended_flags = get_be16(&ondisk2->flags2) << 16; |
06aaaa0b NTND |
1495 | /* We do not yet understand any bit out of CE_EXTENDED_FLAGS */ |
1496 | if (extended_flags & ~CE_EXTENDED_FLAGS) | |
1497 | die("Unknown index entry format %08x", extended_flags); | |
debed2a6 | 1498 | flags |= extended_flags; |
06aaaa0b NTND |
1499 | name = ondisk2->name; |
1500 | } | |
1501 | else | |
1502 | name = ondisk->name; | |
1503 | ||
6c9cd161 JH |
1504 | if (!previous_name) { |
1505 | /* v3 and earlier */ | |
1506 | if (len == CE_NAMEMASK) | |
1507 | len = strlen(name); | |
1508 | ce = cache_entry_from_ondisk(ondisk, flags, name, len); | |
1509 | ||
1510 | *ent_size = ondisk_ce_size(ce); | |
1511 | } else { | |
1512 | unsigned long consumed; | |
1513 | consumed = expand_name_field(previous_name, name); | |
1514 | ce = cache_entry_from_ondisk(ondisk, flags, | |
1515 | previous_name->buf, | |
1516 | previous_name->len); | |
1517 | ||
1518 | *ent_size = (name - ((char *)ondisk)) + consumed; | |
1519 | } | |
debed2a6 | 1520 | return ce; |
cf558704 LT |
1521 | } |
1522 | ||
03f15a79 | 1523 | static void check_ce_order(struct index_state *istate) |
15999d0b | 1524 | { |
03f15a79 TG |
1525 | unsigned int i; |
1526 | ||
1527 | for (i = 1; i < istate->cache_nr; i++) { | |
1528 | struct cache_entry *ce = istate->cache[i - 1]; | |
1529 | struct cache_entry *next_ce = istate->cache[i]; | |
1530 | int name_compare = strcmp(ce->name, next_ce->name); | |
1531 | ||
1532 | if (0 < name_compare) | |
1533 | die("unordered stage entries in index"); | |
1534 | if (!name_compare) { | |
1535 | if (!ce_stage(ce)) | |
1536 | die("multiple stage entries for merged file '%s'", | |
1537 | ce->name); | |
1538 | if (ce_stage(ce) > ce_stage(next_ce)) | |
1539 | die("unordered stage entries for '%s'", | |
1540 | ce->name); | |
1541 | } | |
15999d0b JSP |
1542 | } |
1543 | } | |
1544 | ||
435ec090 CC |
1545 | static void tweak_untracked_cache(struct index_state *istate) |
1546 | { | |
1547 | switch (git_config_get_untracked_cache()) { | |
1548 | case -1: /* keep: do nothing */ | |
1549 | break; | |
1550 | case 0: /* false */ | |
1551 | remove_untracked_cache(istate); | |
1552 | break; | |
1553 | case 1: /* true */ | |
1554 | add_untracked_cache(istate); | |
1555 | break; | |
1556 | default: /* unknown value: do nothing */ | |
1557 | break; | |
1558 | } | |
1559 | } | |
1560 | ||
1561 | static void post_read_index_from(struct index_state *istate) | |
1562 | { | |
1563 | check_ce_order(istate); | |
1564 | tweak_untracked_cache(istate); | |
1565 | } | |
1566 | ||
8fd2cb40 | 1567 | /* remember to discard_cache() before reading a different cache! */ |
3e52f70b | 1568 | int do_read_index(struct index_state *istate, const char *path, int must_exist) |
e83c5163 LT |
1569 | { |
1570 | int fd, i; | |
1571 | struct stat st; | |
debed2a6 | 1572 | unsigned long src_offset; |
e83c5163 | 1573 | struct cache_header *hdr; |
7a51ed66 LT |
1574 | void *mmap; |
1575 | size_t mmap_size; | |
6c9cd161 | 1576 | struct strbuf previous_name_buf = STRBUF_INIT, *previous_name; |
e83c5163 | 1577 | |
913e0e99 | 1578 | if (istate->initialized) |
4aab5b46 | 1579 | return istate->cache_nr; |
5d1a5c02 | 1580 | |
fba2f38a KB |
1581 | istate->timestamp.sec = 0; |
1582 | istate->timestamp.nsec = 0; | |
8fd2cb40 | 1583 | fd = open(path, O_RDONLY); |
5d1a5c02 | 1584 | if (fd < 0) { |
5fc2fc8f | 1585 | if (!must_exist && errno == ENOENT) |
5d1a5c02 | 1586 | return 0; |
5fc2fc8f | 1587 | die_errno("%s: index file open failed", path); |
5d1a5c02 | 1588 | } |
e83c5163 | 1589 | |
3511a377 | 1590 | if (fstat(fd, &st)) |
d824cbba | 1591 | die_errno("cannot stat the open index"); |
3511a377 | 1592 | |
7a51ed66 LT |
1593 | mmap_size = xsize_t(st.st_size); |
1594 | if (mmap_size < sizeof(struct cache_header) + 20) | |
3511a377 LFC |
1595 | die("index file smaller than expected"); |
1596 | ||
a1293ef7 | 1597 | mmap = xmmap(NULL, mmap_size, PROT_READ, MAP_PRIVATE, fd, 0); |
7a51ed66 | 1598 | if (mmap == MAP_FAILED) |
0721c314 | 1599 | die_errno("unable to map index file"); |
57d84f8d | 1600 | close(fd); |
e83c5163 | 1601 | |
7a51ed66 LT |
1602 | hdr = mmap; |
1603 | if (verify_hdr(hdr, mmap_size) < 0) | |
e83c5163 LT |
1604 | goto unmap; |
1605 | ||
e93021b2 | 1606 | hashcpy(istate->sha1, (const unsigned char *)hdr + mmap_size - 20); |
9d227781 | 1607 | istate->version = ntohl(hdr->hdr_version); |
4aab5b46 JH |
1608 | istate->cache_nr = ntohl(hdr->hdr_entries); |
1609 | istate->cache_alloc = alloc_nr(istate->cache_nr); | |
c4aa3167 | 1610 | istate->cache = xcalloc(istate->cache_alloc, sizeof(*istate->cache)); |
913e0e99 | 1611 | istate->initialized = 1; |
7a51ed66 | 1612 | |
9d227781 | 1613 | if (istate->version == 4) |
6c9cd161 JH |
1614 | previous_name = &previous_name_buf; |
1615 | else | |
1616 | previous_name = NULL; | |
1617 | ||
7a51ed66 | 1618 | src_offset = sizeof(*hdr); |
4aab5b46 | 1619 | for (i = 0; i < istate->cache_nr; i++) { |
7a51ed66 | 1620 | struct ondisk_cache_entry *disk_ce; |
4aab5b46 | 1621 | struct cache_entry *ce; |
936f53d0 | 1622 | unsigned long consumed; |
4aab5b46 | 1623 | |
7a51ed66 | 1624 | disk_ce = (struct ondisk_cache_entry *)((char *)mmap + src_offset); |
6c9cd161 | 1625 | ce = create_from_disk(disk_ce, &consumed, previous_name); |
cf558704 | 1626 | set_index_entry(istate, i, ce); |
7a51ed66 | 1627 | |
936f53d0 | 1628 | src_offset += consumed; |
e83c5163 | 1629 | } |
6c9cd161 | 1630 | strbuf_release(&previous_name_buf); |
fba2f38a | 1631 | istate->timestamp.sec = st.st_mtime; |
c06ff490 | 1632 | istate->timestamp.nsec = ST_MTIME_NSEC(st); |
fba2f38a | 1633 | |
7a51ed66 | 1634 | while (src_offset <= mmap_size - 20 - 8) { |
bad68ec9 JH |
1635 | /* After an array of active_nr index entries, |
1636 | * there can be arbitrary number of extended | |
1637 | * sections, each of which is prefixed with | |
1638 | * extension name (4-byte) and section length | |
1639 | * in 4-byte network byte order. | |
1640 | */ | |
07cc8eca | 1641 | uint32_t extsize; |
7a51ed66 | 1642 | memcpy(&extsize, (char *)mmap + src_offset + 4, 4); |
bad68ec9 | 1643 | extsize = ntohl(extsize); |
4aab5b46 | 1644 | if (read_index_extension(istate, |
7a51ed66 LT |
1645 | (const char *) mmap + src_offset, |
1646 | (char *) mmap + src_offset + 8, | |
1d7f171c | 1647 | extsize) < 0) |
bad68ec9 | 1648 | goto unmap; |
7a51ed66 LT |
1649 | src_offset += 8; |
1650 | src_offset += extsize; | |
bad68ec9 | 1651 | } |
7a51ed66 | 1652 | munmap(mmap, mmap_size); |
4aab5b46 | 1653 | return istate->cache_nr; |
e83c5163 LT |
1654 | |
1655 | unmap: | |
7a51ed66 | 1656 | munmap(mmap, mmap_size); |
5d1a5c02 | 1657 | die("index file corrupt"); |
e83c5163 LT |
1658 | } |
1659 | ||
5fc2fc8f NTND |
1660 | int read_index_from(struct index_state *istate, const char *path) |
1661 | { | |
1662 | struct split_index *split_index; | |
1663 | int ret; | |
1664 | ||
1665 | /* istate->initialized covers both .git/index and .git/sharedindex.xxx */ | |
1666 | if (istate->initialized) | |
1667 | return istate->cache_nr; | |
1668 | ||
1669 | ret = do_read_index(istate, path, 0); | |
435ec090 | 1670 | |
5fc2fc8f | 1671 | split_index = istate->split_index; |
03f15a79 | 1672 | if (!split_index || is_null_sha1(split_index->base_sha1)) { |
435ec090 | 1673 | post_read_index_from(istate); |
5fc2fc8f | 1674 | return ret; |
03f15a79 | 1675 | } |
5fc2fc8f NTND |
1676 | |
1677 | if (split_index->base) | |
1678 | discard_index(split_index->base); | |
1679 | else | |
1680 | split_index->base = xcalloc(1, sizeof(*split_index->base)); | |
1681 | ret = do_read_index(split_index->base, | |
1682 | git_path("sharedindex.%s", | |
1683 | sha1_to_hex(split_index->base_sha1)), 1); | |
1684 | if (hashcmp(split_index->base_sha1, split_index->base->sha1)) | |
1685 | die("broken index, expect %s in %s, got %s", | |
1686 | sha1_to_hex(split_index->base_sha1), | |
1687 | git_path("sharedindex.%s", | |
6bea53c1 | 1688 | sha1_to_hex(split_index->base_sha1)), |
5fc2fc8f NTND |
1689 | sha1_to_hex(split_index->base->sha1)); |
1690 | merge_base_index(istate); | |
435ec090 | 1691 | post_read_index_from(istate); |
5fc2fc8f NTND |
1692 | return ret; |
1693 | } | |
1694 | ||
fa7b3c2f JH |
1695 | int is_index_unborn(struct index_state *istate) |
1696 | { | |
debed2a6 | 1697 | return (!istate->cache_nr && !istate->timestamp.sec); |
fa7b3c2f JH |
1698 | } |
1699 | ||
4aab5b46 | 1700 | int discard_index(struct index_state *istate) |
6d297f81 | 1701 | { |
debed2a6 RS |
1702 | int i; |
1703 | ||
5fc2fc8f NTND |
1704 | for (i = 0; i < istate->cache_nr; i++) { |
1705 | if (istate->cache[i]->index && | |
1706 | istate->split_index && | |
1707 | istate->split_index->base && | |
1708 | istate->cache[i]->index <= istate->split_index->base->cache_nr && | |
1709 | istate->cache[i] == istate->split_index->base->cache[istate->cache[i]->index - 1]) | |
1710 | continue; | |
debed2a6 | 1711 | free(istate->cache[i]); |
5fc2fc8f | 1712 | } |
cfc5789a | 1713 | resolve_undo_clear_index(istate); |
4aab5b46 JH |
1714 | istate->cache_nr = 0; |
1715 | istate->cache_changed = 0; | |
fba2f38a KB |
1716 | istate->timestamp.sec = 0; |
1717 | istate->timestamp.nsec = 0; | |
2092678c | 1718 | free_name_hash(istate); |
4aab5b46 | 1719 | cache_tree_free(&(istate->cache_tree)); |
913e0e99 | 1720 | istate->initialized = 0; |
a0fc4db0 RS |
1721 | free(istate->cache); |
1722 | istate->cache = NULL; | |
1723 | istate->cache_alloc = 0; | |
5fc2fc8f | 1724 | discard_split_index(istate); |
f9e6c649 NTND |
1725 | free_untracked_cache(istate->untracked); |
1726 | istate->untracked = NULL; | |
7a51ed66 | 1727 | return 0; |
6d297f81 JS |
1728 | } |
1729 | ||
d1f128b0 | 1730 | int unmerged_index(const struct index_state *istate) |
94a5728c DB |
1731 | { |
1732 | int i; | |
1733 | for (i = 0; i < istate->cache_nr; i++) { | |
1734 | if (ce_stage(istate->cache[i])) | |
1735 | return 1; | |
1736 | } | |
1737 | return 0; | |
1738 | } | |
1739 | ||
4990aadc | 1740 | #define WRITE_BUFFER_SIZE 8192 |
bf0f910d | 1741 | static unsigned char write_buffer[WRITE_BUFFER_SIZE]; |
4990aadc LT |
1742 | static unsigned long write_buffer_len; |
1743 | ||
9126f009 | 1744 | static int ce_write_flush(git_SHA_CTX *context, int fd) |
6015c28b JH |
1745 | { |
1746 | unsigned int buffered = write_buffer_len; | |
1747 | if (buffered) { | |
9126f009 | 1748 | git_SHA1_Update(context, write_buffer, buffered); |
93822c22 | 1749 | if (write_in_full(fd, write_buffer, buffered) != buffered) |
6015c28b JH |
1750 | return -1; |
1751 | write_buffer_len = 0; | |
1752 | } | |
1753 | return 0; | |
1754 | } | |
1755 | ||
9126f009 | 1756 | static int ce_write(git_SHA_CTX *context, int fd, void *data, unsigned int len) |
4990aadc LT |
1757 | { |
1758 | while (len) { | |
1759 | unsigned int buffered = write_buffer_len; | |
1760 | unsigned int partial = WRITE_BUFFER_SIZE - buffered; | |
1761 | if (partial > len) | |
1762 | partial = len; | |
1763 | memcpy(write_buffer + buffered, data, partial); | |
1764 | buffered += partial; | |
1765 | if (buffered == WRITE_BUFFER_SIZE) { | |
6015c28b JH |
1766 | write_buffer_len = buffered; |
1767 | if (ce_write_flush(context, fd)) | |
4990aadc LT |
1768 | return -1; |
1769 | buffered = 0; | |
1770 | } | |
1771 | write_buffer_len = buffered; | |
1772 | len -= partial; | |
1d7f171c | 1773 | data = (char *) data + partial; |
a6080a0a JH |
1774 | } |
1775 | return 0; | |
4990aadc LT |
1776 | } |
1777 | ||
9126f009 | 1778 | static int write_index_ext_header(git_SHA_CTX *context, int fd, |
ac58c7b1 | 1779 | unsigned int ext, unsigned int sz) |
bad68ec9 JH |
1780 | { |
1781 | ext = htonl(ext); | |
1782 | sz = htonl(sz); | |
968a1d65 DR |
1783 | return ((ce_write(context, fd, &ext, 4) < 0) || |
1784 | (ce_write(context, fd, &sz, 4) < 0)) ? -1 : 0; | |
bad68ec9 JH |
1785 | } |
1786 | ||
e93021b2 | 1787 | static int ce_flush(git_SHA_CTX *context, int fd, unsigned char *sha1) |
4990aadc LT |
1788 | { |
1789 | unsigned int left = write_buffer_len; | |
ca9be054 | 1790 | |
4990aadc LT |
1791 | if (left) { |
1792 | write_buffer_len = 0; | |
9126f009 | 1793 | git_SHA1_Update(context, write_buffer, left); |
4990aadc | 1794 | } |
ca9be054 | 1795 | |
2c865d9a QH |
1796 | /* Flush first if not enough space for SHA1 signature */ |
1797 | if (left + 20 > WRITE_BUFFER_SIZE) { | |
93822c22 | 1798 | if (write_in_full(fd, write_buffer, left) != left) |
2c865d9a QH |
1799 | return -1; |
1800 | left = 0; | |
1801 | } | |
1802 | ||
ca9be054 | 1803 | /* Append the SHA1 signature at the end */ |
9126f009 | 1804 | git_SHA1_Final(write_buffer + left, context); |
e93021b2 | 1805 | hashcpy(sha1, write_buffer + left); |
ca9be054 | 1806 | left += 20; |
93822c22 | 1807 | return (write_in_full(fd, write_buffer, left) != left) ? -1 : 0; |
4990aadc LT |
1808 | } |
1809 | ||
407c8eb0 JH |
1810 | static void ce_smudge_racily_clean_entry(struct cache_entry *ce) |
1811 | { | |
1812 | /* | |
1813 | * The only thing we care about in this function is to smudge the | |
1814 | * falsely clean entry due to touch-update-touch race, so we leave | |
1815 | * everything else as they are. We are called for entries whose | |
c21d39d7 | 1816 | * ce_stat_data.sd_mtime match the index file mtime. |
c70115b4 JH |
1817 | * |
1818 | * Note that this actually does not do much for gitlinks, for | |
1819 | * which ce_match_stat_basic() always goes to the actual | |
1820 | * contents. The caller checks with is_racy_timestamp() which | |
1821 | * always says "no" for gitlinks, so we are not called for them ;-) | |
407c8eb0 JH |
1822 | */ |
1823 | struct stat st; | |
1824 | ||
1825 | if (lstat(ce->name, &st) < 0) | |
1826 | return; | |
1827 | if (ce_match_stat_basic(ce, &st)) | |
1828 | return; | |
1829 | if (ce_modified_check_fs(ce, &st)) { | |
4b3511b0 JH |
1830 | /* This is "racily clean"; smudge it. Note that this |
1831 | * is a tricky code. At first glance, it may appear | |
1832 | * that it can break with this sequence: | |
1833 | * | |
1834 | * $ echo xyzzy >frotz | |
1835 | * $ git-update-index --add frotz | |
1836 | * $ : >frotz | |
1837 | * $ sleep 3 | |
1838 | * $ echo filfre >nitfol | |
1839 | * $ git-update-index --add nitfol | |
1840 | * | |
b7e58b17 | 1841 | * but it does not. When the second update-index runs, |
4b3511b0 JH |
1842 | * it notices that the entry "frotz" has the same timestamp |
1843 | * as index, and if we were to smudge it by resetting its | |
1844 | * size to zero here, then the object name recorded | |
1845 | * in index is the 6-byte file but the cached stat information | |
1846 | * becomes zero --- which would then match what we would | |
a6080a0a | 1847 | * obtain from the filesystem next time we stat("frotz"). |
4b3511b0 JH |
1848 | * |
1849 | * However, the second update-index, before calling | |
1850 | * this function, notices that the cached size is 6 | |
1851 | * bytes and what is on the filesystem is an empty | |
1852 | * file, and never calls us, so the cached size information | |
1853 | * for "frotz" stays 6 which does not match the filesystem. | |
1854 | */ | |
c21d39d7 | 1855 | ce->ce_stat_data.sd_size = 0; |
407c8eb0 JH |
1856 | } |
1857 | } | |
1858 | ||
f136f7bf JH |
1859 | /* Copy miscellaneous fields but not the name */ |
1860 | static char *copy_cache_entry_to_ondisk(struct ondisk_cache_entry *ondisk, | |
1861 | struct cache_entry *ce) | |
7a51ed66 | 1862 | { |
b60e188c TG |
1863 | short flags; |
1864 | ||
c21d39d7 MH |
1865 | ondisk->ctime.sec = htonl(ce->ce_stat_data.sd_ctime.sec); |
1866 | ondisk->mtime.sec = htonl(ce->ce_stat_data.sd_mtime.sec); | |
1867 | ondisk->ctime.nsec = htonl(ce->ce_stat_data.sd_ctime.nsec); | |
1868 | ondisk->mtime.nsec = htonl(ce->ce_stat_data.sd_mtime.nsec); | |
1869 | ondisk->dev = htonl(ce->ce_stat_data.sd_dev); | |
1870 | ondisk->ino = htonl(ce->ce_stat_data.sd_ino); | |
7a51ed66 | 1871 | ondisk->mode = htonl(ce->ce_mode); |
c21d39d7 MH |
1872 | ondisk->uid = htonl(ce->ce_stat_data.sd_uid); |
1873 | ondisk->gid = htonl(ce->ce_stat_data.sd_gid); | |
1874 | ondisk->size = htonl(ce->ce_stat_data.sd_size); | |
99d1a986 | 1875 | hashcpy(ondisk->sha1, ce->oid.hash); |
b60e188c | 1876 | |
ce51bf09 | 1877 | flags = ce->ce_flags & ~CE_NAMEMASK; |
b60e188c TG |
1878 | flags |= (ce_namelen(ce) >= CE_NAMEMASK ? CE_NAMEMASK : ce_namelen(ce)); |
1879 | ondisk->flags = htons(flags); | |
06aaaa0b NTND |
1880 | if (ce->ce_flags & CE_EXTENDED) { |
1881 | struct ondisk_cache_entry_extended *ondisk2; | |
1882 | ondisk2 = (struct ondisk_cache_entry_extended *)ondisk; | |
1883 | ondisk2->flags2 = htons((ce->ce_flags & CE_EXTENDED_FLAGS) >> 16); | |
f136f7bf | 1884 | return ondisk2->name; |
06aaaa0b | 1885 | } |
f136f7bf JH |
1886 | else { |
1887 | return ondisk->name; | |
1888 | } | |
1889 | } | |
1890 | ||
9d227781 JH |
1891 | static int ce_write_entry(git_SHA_CTX *c, int fd, struct cache_entry *ce, |
1892 | struct strbuf *previous_name) | |
f136f7bf | 1893 | { |
9d227781 JH |
1894 | int size; |
1895 | struct ondisk_cache_entry *ondisk; | |
b3c96fb1 | 1896 | int saved_namelen = saved_namelen; /* compiler workaround */ |
f136f7bf JH |
1897 | char *name; |
1898 | int result; | |
1899 | ||
b3c96fb1 NTND |
1900 | if (ce->ce_flags & CE_STRIP_NAME) { |
1901 | saved_namelen = ce_namelen(ce); | |
1902 | ce->ce_namelen = 0; | |
1903 | } | |
1904 | ||
9d227781 JH |
1905 | if (!previous_name) { |
1906 | size = ondisk_ce_size(ce); | |
1907 | ondisk = xcalloc(1, size); | |
1908 | name = copy_cache_entry_to_ondisk(ondisk, ce); | |
1909 | memcpy(name, ce->name, ce_namelen(ce)); | |
1910 | } else { | |
1911 | int common, to_remove, prefix_size; | |
1912 | unsigned char to_remove_vi[16]; | |
1913 | for (common = 0; | |
1914 | (ce->name[common] && | |
1915 | common < previous_name->len && | |
1916 | ce->name[common] == previous_name->buf[common]); | |
1917 | common++) | |
1918 | ; /* still matching */ | |
1919 | to_remove = previous_name->len - common; | |
1920 | prefix_size = encode_varint(to_remove, to_remove_vi); | |
1921 | ||
1922 | if (ce->ce_flags & CE_EXTENDED) | |
1923 | size = offsetof(struct ondisk_cache_entry_extended, name); | |
1924 | else | |
1925 | size = offsetof(struct ondisk_cache_entry, name); | |
1926 | size += prefix_size + (ce_namelen(ce) - common + 1); | |
1927 | ||
1928 | ondisk = xcalloc(1, size); | |
1929 | name = copy_cache_entry_to_ondisk(ondisk, ce); | |
1930 | memcpy(name, to_remove_vi, prefix_size); | |
1931 | memcpy(name + prefix_size, ce->name + common, ce_namelen(ce) - common); | |
1932 | ||
1933 | strbuf_splice(previous_name, common, to_remove, | |
1934 | ce->name + common, ce_namelen(ce) - common); | |
06aaaa0b | 1935 | } |
b3c96fb1 NTND |
1936 | if (ce->ce_flags & CE_STRIP_NAME) { |
1937 | ce->ce_namelen = saved_namelen; | |
1938 | ce->ce_flags &= ~CE_STRIP_NAME; | |
1939 | } | |
7a51ed66 | 1940 | |
59efba64 JN |
1941 | result = ce_write(c, fd, ondisk, size); |
1942 | free(ondisk); | |
1943 | return result; | |
7a51ed66 LT |
1944 | } |
1945 | ||
426ddeea YM |
1946 | /* |
1947 | * This function verifies if index_state has the correct sha1 of the | |
1948 | * index file. Don't die if we have any other failure, just return 0. | |
1949 | */ | |
1950 | static int verify_index_from(const struct index_state *istate, const char *path) | |
1951 | { | |
1952 | int fd; | |
1953 | ssize_t n; | |
1954 | struct stat st; | |
1955 | unsigned char sha1[20]; | |
1956 | ||
1957 | if (!istate->initialized) | |
1958 | return 0; | |
1959 | ||
1960 | fd = open(path, O_RDONLY); | |
1961 | if (fd < 0) | |
1962 | return 0; | |
1963 | ||
1964 | if (fstat(fd, &st)) | |
1965 | goto out; | |
1966 | ||
1967 | if (st.st_size < sizeof(struct cache_header) + 20) | |
1968 | goto out; | |
1969 | ||
1970 | n = pread_in_full(fd, sha1, 20, st.st_size - 20); | |
1971 | if (n != 20) | |
1972 | goto out; | |
1973 | ||
1974 | if (hashcmp(istate->sha1, sha1)) | |
1975 | goto out; | |
1976 | ||
1977 | close(fd); | |
1978 | return 1; | |
1979 | ||
1980 | out: | |
1981 | close(fd); | |
1982 | return 0; | |
1983 | } | |
1984 | ||
1985 | static int verify_index(const struct index_state *istate) | |
1986 | { | |
1987 | return verify_index_from(istate, get_index_file()); | |
1988 | } | |
1989 | ||
483fbe2b JH |
1990 | static int has_racy_timestamp(struct index_state *istate) |
1991 | { | |
1992 | int entries = istate->cache_nr; | |
1993 | int i; | |
1994 | ||
1995 | for (i = 0; i < entries; i++) { | |
1996 | struct cache_entry *ce = istate->cache[i]; | |
1997 | if (is_racy_timestamp(istate, ce)) | |
1998 | return 1; | |
1999 | } | |
2000 | return 0; | |
2001 | } | |
2002 | ||
ccdc4ec3 | 2003 | /* |
98e023de | 2004 | * Opportunistically update the index but do not complain if we can't |
ccdc4ec3 JH |
2005 | */ |
2006 | void update_index_if_able(struct index_state *istate, struct lock_file *lockfile) | |
2007 | { | |
483fbe2b | 2008 | if ((istate->cache_changed || has_racy_timestamp(istate)) && |
788cef81 | 2009 | verify_index(istate) && |
03b86647 | 2010 | write_locked_index(istate, lockfile, COMMIT_LOCK)) |
ccdc4ec3 JH |
2011 | rollback_lock_file(lockfile); |
2012 | } | |
2013 | ||
c18b80a0 NTND |
2014 | static int do_write_index(struct index_state *istate, int newfd, |
2015 | int strip_extensions) | |
197ee8c9 | 2016 | { |
9126f009 | 2017 | git_SHA_CTX c; |
197ee8c9 | 2018 | struct cache_header hdr; |
9d227781 | 2019 | int i, err, removed, extended, hdr_version; |
4aab5b46 JH |
2020 | struct cache_entry **cache = istate->cache; |
2021 | int entries = istate->cache_nr; | |
e1afca4f | 2022 | struct stat st; |
9d227781 | 2023 | struct strbuf previous_name_buf = STRBUF_INIT, *previous_name; |
025a0709 | 2024 | |
06aaaa0b | 2025 | for (i = removed = extended = 0; i < entries; i++) { |
7a51ed66 | 2026 | if (cache[i]->ce_flags & CE_REMOVE) |
025a0709 | 2027 | removed++; |
197ee8c9 | 2028 | |
06aaaa0b NTND |
2029 | /* reduce extended entries if possible */ |
2030 | cache[i]->ce_flags &= ~CE_EXTENDED; | |
2031 | if (cache[i]->ce_flags & CE_EXTENDED_FLAGS) { | |
2032 | extended++; | |
2033 | cache[i]->ce_flags |= CE_EXTENDED; | |
2034 | } | |
2035 | } | |
2036 | ||
d6e3c181 | 2037 | if (!istate->version) { |
136347d7 | 2038 | istate->version = get_index_format_default(); |
d6e3c181 NTND |
2039 | if (getenv("GIT_TEST_SPLIT_INDEX")) |
2040 | init_split_index(istate); | |
2041 | } | |
9d227781 JH |
2042 | |
2043 | /* demote version 3 to version 2 when the latter suffices */ | |
2044 | if (istate->version == 3 || istate->version == 2) | |
2045 | istate->version = extended ? 3 : 2; | |
2046 | ||
2047 | hdr_version = istate->version; | |
2048 | ||
ccc4feb5 | 2049 | hdr.hdr_signature = htonl(CACHE_SIGNATURE); |
9d227781 | 2050 | hdr.hdr_version = htonl(hdr_version); |
025a0709 | 2051 | hdr.hdr_entries = htonl(entries - removed); |
197ee8c9 | 2052 | |
9126f009 | 2053 | git_SHA1_Init(&c); |
ca9be054 | 2054 | if (ce_write(&c, newfd, &hdr, sizeof(hdr)) < 0) |
197ee8c9 LT |
2055 | return -1; |
2056 | ||
9d227781 | 2057 | previous_name = (hdr_version == 4) ? &previous_name_buf : NULL; |
197ee8c9 LT |
2058 | for (i = 0; i < entries; i++) { |
2059 | struct cache_entry *ce = cache[i]; | |
7a51ed66 | 2060 | if (ce->ce_flags & CE_REMOVE) |
aa16021e | 2061 | continue; |
e06c43c7 | 2062 | if (!ce_uptodate(ce) && is_racy_timestamp(istate, ce)) |
407c8eb0 | 2063 | ce_smudge_racily_clean_entry(ce); |
99d1a986 | 2064 | if (is_null_oid(&ce->oid)) { |
83bd7437 JK |
2065 | static const char msg[] = "cache entry has null sha1: %s"; |
2066 | static int allow = -1; | |
2067 | ||
2068 | if (allow < 0) | |
2069 | allow = git_env_bool("GIT_ALLOW_NULL_SHA1", 0); | |
2070 | if (allow) | |
2071 | warning(msg, ce->name); | |
2072 | else | |
2073 | return error(msg, ce->name); | |
2074 | } | |
9d227781 | 2075 | if (ce_write_entry(&c, newfd, ce, previous_name) < 0) |
197ee8c9 LT |
2076 | return -1; |
2077 | } | |
9d227781 | 2078 | strbuf_release(&previous_name_buf); |
1af1c2b6 | 2079 | |
bad68ec9 | 2080 | /* Write extension data here */ |
c18b80a0 | 2081 | if (!strip_extensions && istate->split_index) { |
5fc2fc8f NTND |
2082 | struct strbuf sb = STRBUF_INIT; |
2083 | ||
2084 | err = write_link_extension(&sb, istate) < 0 || | |
2085 | write_index_ext_header(&c, newfd, CACHE_EXT_LINK, | |
2086 | sb.len) < 0 || | |
2087 | ce_write(&c, newfd, sb.buf, sb.len) < 0; | |
2088 | strbuf_release(&sb); | |
2089 | if (err) | |
2090 | return -1; | |
2091 | } | |
c18b80a0 | 2092 | if (!strip_extensions && istate->cache_tree) { |
f285a2d7 | 2093 | struct strbuf sb = STRBUF_INIT; |
1dffb8fa | 2094 | |
1dffb8fa PH |
2095 | cache_tree_write(&sb, istate->cache_tree); |
2096 | err = write_index_ext_header(&c, newfd, CACHE_EXT_TREE, sb.len) < 0 | |
2097 | || ce_write(&c, newfd, sb.buf, sb.len) < 0; | |
2098 | strbuf_release(&sb); | |
2099 | if (err) | |
bad68ec9 | 2100 | return -1; |
bad68ec9 | 2101 | } |
c18b80a0 | 2102 | if (!strip_extensions && istate->resolve_undo) { |
cfc5789a JH |
2103 | struct strbuf sb = STRBUF_INIT; |
2104 | ||
2105 | resolve_undo_write(&sb, istate->resolve_undo); | |
2106 | err = write_index_ext_header(&c, newfd, CACHE_EXT_RESOLVE_UNDO, | |
2107 | sb.len) < 0 | |
2108 | || ce_write(&c, newfd, sb.buf, sb.len) < 0; | |
2109 | strbuf_release(&sb); | |
2110 | if (err) | |
2111 | return -1; | |
2112 | } | |
83c094ad NTND |
2113 | if (!strip_extensions && istate->untracked) { |
2114 | struct strbuf sb = STRBUF_INIT; | |
2115 | ||
2116 | write_untracked_extension(&sb, istate->untracked); | |
2117 | err = write_index_ext_header(&c, newfd, CACHE_EXT_UNTRACKED, | |
2118 | sb.len) < 0 || | |
2119 | ce_write(&c, newfd, sb.buf, sb.len) < 0; | |
2120 | strbuf_release(&sb); | |
2121 | if (err) | |
2122 | return -1; | |
2123 | } | |
e1afca4f | 2124 | |
e93021b2 | 2125 | if (ce_flush(&c, newfd, istate->sha1) || fstat(newfd, &st)) |
e1afca4f | 2126 | return -1; |
5bcf109c KB |
2127 | istate->timestamp.sec = (unsigned int)st.st_mtime; |
2128 | istate->timestamp.nsec = ST_MTIME_NSEC(st); | |
e1afca4f | 2129 | return 0; |
197ee8c9 | 2130 | } |
e46bbcf6 | 2131 | |
626f35c8 NTND |
2132 | void set_alternate_index_output(const char *name) |
2133 | { | |
2134 | alternate_index_output = name; | |
2135 | } | |
2136 | ||
2137 | static int commit_locked_index(struct lock_file *lk) | |
2138 | { | |
751baced MH |
2139 | if (alternate_index_output) |
2140 | return commit_lock_file_to(lk, alternate_index_output); | |
2141 | else | |
626f35c8 | 2142 | return commit_lock_file(lk); |
626f35c8 NTND |
2143 | } |
2144 | ||
03b86647 NTND |
2145 | static int do_write_locked_index(struct index_state *istate, struct lock_file *lock, |
2146 | unsigned flags) | |
2147 | { | |
c99a4c2d | 2148 | int ret = do_write_index(istate, get_lock_file_fd(lock), 0); |
03b86647 NTND |
2149 | if (ret) |
2150 | return ret; | |
2151 | assert((flags & (COMMIT_LOCK | CLOSE_LOCK)) != | |
2152 | (COMMIT_LOCK | CLOSE_LOCK)); | |
2153 | if (flags & COMMIT_LOCK) | |
2154 | return commit_locked_index(lock); | |
2155 | else if (flags & CLOSE_LOCK) | |
2156 | return close_lock_file(lock); | |
2157 | else | |
2158 | return ret; | |
2159 | } | |
2160 | ||
5fc2fc8f NTND |
2161 | static int write_split_index(struct index_state *istate, |
2162 | struct lock_file *lock, | |
2163 | unsigned flags) | |
2164 | { | |
2165 | int ret; | |
2166 | prepare_to_write_split_index(istate); | |
2167 | ret = do_write_locked_index(istate, lock, flags); | |
2168 | finish_writing_split_index(istate); | |
2169 | return ret; | |
2170 | } | |
2171 | ||
f6ecc62d | 2172 | static struct tempfile temporary_sharedindex; |
c18b80a0 | 2173 | |
a0a96756 NTND |
2174 | static int write_shared_index(struct index_state *istate, |
2175 | struct lock_file *lock, unsigned flags) | |
c18b80a0 NTND |
2176 | { |
2177 | struct split_index *si = istate->split_index; | |
c18b80a0 NTND |
2178 | int fd, ret; |
2179 | ||
f6ecc62d | 2180 | fd = mks_tempfile(&temporary_sharedindex, git_path("sharedindex_XXXXXX")); |
a0a96756 | 2181 | if (fd < 0) { |
a0a96756 NTND |
2182 | hashclr(si->base_sha1); |
2183 | return do_write_locked_index(istate, lock, flags); | |
2184 | } | |
c18b80a0 NTND |
2185 | move_cache_to_base_index(istate); |
2186 | ret = do_write_index(si->base, fd, 1); | |
c18b80a0 | 2187 | if (ret) { |
f6ecc62d | 2188 | delete_tempfile(&temporary_sharedindex); |
c18b80a0 NTND |
2189 | return ret; |
2190 | } | |
f6ecc62d MH |
2191 | ret = rename_tempfile(&temporary_sharedindex, |
2192 | git_path("sharedindex.%s", sha1_to_hex(si->base->sha1))); | |
c18b80a0 NTND |
2193 | if (!ret) |
2194 | hashcpy(si->base_sha1, si->base->sha1); | |
2195 | return ret; | |
2196 | } | |
2197 | ||
03b86647 NTND |
2198 | int write_locked_index(struct index_state *istate, struct lock_file *lock, |
2199 | unsigned flags) | |
2200 | { | |
5fc2fc8f NTND |
2201 | struct split_index *si = istate->split_index; |
2202 | ||
5165dd59 NTND |
2203 | if (!si || alternate_index_output || |
2204 | (istate->cache_changed & ~EXTMASK)) { | |
5fc2fc8f NTND |
2205 | if (si) |
2206 | hashclr(si->base_sha1); | |
2207 | return do_write_locked_index(istate, lock, flags); | |
2208 | } | |
2209 | ||
d6e3c181 NTND |
2210 | if (getenv("GIT_TEST_SPLIT_INDEX")) { |
2211 | int v = si->base_sha1[0]; | |
2212 | if ((v & 15) < 6) | |
2213 | istate->cache_changed |= SPLIT_INDEX_ORDERED; | |
2214 | } | |
c18b80a0 | 2215 | if (istate->cache_changed & SPLIT_INDEX_ORDERED) { |
a0a96756 | 2216 | int ret = write_shared_index(istate, lock, flags); |
c18b80a0 NTND |
2217 | if (ret) |
2218 | return ret; | |
2219 | } | |
2220 | ||
5fc2fc8f | 2221 | return write_split_index(istate, lock, flags); |
03b86647 NTND |
2222 | } |
2223 | ||
e46bbcf6 MV |
2224 | /* |
2225 | * Read the index file that is potentially unmerged into given | |
63e8dc5b | 2226 | * index_state, dropping any unmerged entries. Returns true if |
e46bbcf6 MV |
2227 | * the index is unmerged. Callers who want to refuse to work |
2228 | * from an unmerged state can call this and check its return value, | |
2229 | * instead of calling read_cache(). | |
2230 | */ | |
2231 | int read_index_unmerged(struct index_state *istate) | |
2232 | { | |
2233 | int i; | |
d1a43f2a | 2234 | int unmerged = 0; |
e46bbcf6 MV |
2235 | |
2236 | read_index(istate); | |
e46bbcf6 MV |
2237 | for (i = 0; i < istate->cache_nr; i++) { |
2238 | struct cache_entry *ce = istate->cache[i]; | |
d1a43f2a JH |
2239 | struct cache_entry *new_ce; |
2240 | int size, len; | |
2241 | ||
2242 | if (!ce_stage(ce)) | |
e46bbcf6 | 2243 | continue; |
d1a43f2a | 2244 | unmerged = 1; |
68c4f6a5 | 2245 | len = ce_namelen(ce); |
d1a43f2a JH |
2246 | size = cache_entry_size(len); |
2247 | new_ce = xcalloc(1, size); | |
d1a43f2a | 2248 | memcpy(new_ce->name, ce->name, len); |
b60e188c TG |
2249 | new_ce->ce_flags = create_ce_flags(0) | CE_CONFLICTED; |
2250 | new_ce->ce_namelen = len; | |
d1a43f2a JH |
2251 | new_ce->ce_mode = ce->ce_mode; |
2252 | if (add_index_entry(istate, new_ce, 0)) | |
2253 | return error("%s: cannot drop to stage #0", | |
5699d17e | 2254 | new_ce->name); |
e46bbcf6 | 2255 | } |
d1a43f2a | 2256 | return unmerged; |
e46bbcf6 | 2257 | } |
041aee31 | 2258 | |
98fa4738 JK |
2259 | /* |
2260 | * Returns 1 if the path is an "other" path with respect to | |
2261 | * the index; that is, the path is not mentioned in the index at all, | |
2262 | * either as a file, a directory with some files in the index, | |
2263 | * or as an unmerged entry. | |
2264 | * | |
2265 | * We helpfully remove a trailing "/" from directories so that | |
2266 | * the output of read_directory can be used as-is. | |
2267 | */ | |
2268 | int index_name_is_other(const struct index_state *istate, const char *name, | |
2269 | int namelen) | |
2270 | { | |
2271 | int pos; | |
2272 | if (namelen && name[namelen - 1] == '/') | |
2273 | namelen--; | |
2274 | pos = index_name_pos(istate, name, namelen); | |
2275 | if (0 <= pos) | |
2276 | return 0; /* exact match */ | |
2277 | pos = -pos - 1; | |
2278 | if (pos < istate->cache_nr) { | |
2279 | struct cache_entry *ce = istate->cache[pos]; | |
2280 | if (ce_namelen(ce) == namelen && | |
2281 | !memcmp(ce->name, name, namelen)) | |
2282 | return 0; /* Yup, this one exists unmerged */ | |
2283 | } | |
2284 | return 1; | |
2285 | } | |
29fb37b2 | 2286 | |
87542508 BW |
2287 | void *read_blob_data_from_index(const struct index_state *istate, |
2288 | const char *path, unsigned long *size) | |
29fb37b2 LF |
2289 | { |
2290 | int pos, len; | |
2291 | unsigned long sz; | |
2292 | enum object_type type; | |
2293 | void *data; | |
2294 | ||
2295 | len = strlen(path); | |
2296 | pos = index_name_pos(istate, path, len); | |
2297 | if (pos < 0) { | |
2298 | /* | |
2299 | * We might be in the middle of a merge, in which | |
2300 | * case we would read stage #2 (ours). | |
2301 | */ | |
2302 | int i; | |
2303 | for (i = -pos - 1; | |
2304 | (pos < 0 && i < istate->cache_nr && | |
2305 | !strcmp(istate->cache[i]->name, path)); | |
2306 | i++) | |
2307 | if (ce_stage(istate->cache[i]) == 2) | |
2308 | pos = i; | |
2309 | } | |
2310 | if (pos < 0) | |
2311 | return NULL; | |
99d1a986 | 2312 | data = read_sha1_file(istate->cache[pos]->oid.hash, &type, &sz); |
29fb37b2 LF |
2313 | if (!data || type != OBJ_BLOB) { |
2314 | free(data); | |
2315 | return NULL; | |
2316 | } | |
ff366825 LF |
2317 | if (size) |
2318 | *size = sz; | |
29fb37b2 LF |
2319 | return data; |
2320 | } | |
38612532 MH |
2321 | |
2322 | void stat_validity_clear(struct stat_validity *sv) | |
2323 | { | |
2324 | free(sv->sd); | |
2325 | sv->sd = NULL; | |
2326 | } | |
2327 | ||
2328 | int stat_validity_check(struct stat_validity *sv, const char *path) | |
2329 | { | |
2330 | struct stat st; | |
2331 | ||
2332 | if (stat(path, &st) < 0) | |
2333 | return sv->sd == NULL; | |
2334 | if (!sv->sd) | |
2335 | return 0; | |
2336 | return S_ISREG(st.st_mode) && !match_stat_data(sv->sd, &st); | |
2337 | } | |
2338 | ||
2339 | void stat_validity_update(struct stat_validity *sv, int fd) | |
2340 | { | |
2341 | struct stat st; | |
2342 | ||
2343 | if (fstat(fd, &st) < 0 || !S_ISREG(st.st_mode)) | |
2344 | stat_validity_clear(sv); | |
2345 | else { | |
2346 | if (!sv->sd) | |
2347 | sv->sd = xcalloc(1, sizeof(struct stat_data)); | |
2348 | fill_stat_data(sv->sd, &st); | |
2349 | } | |
2350 | } |