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Commit | Line | Data |
---|---|---|
8bc9a0c7 LT |
1 | /* |
2 | * GIT - The information manager from hell | |
3 | * | |
4 | * Copyright (C) Linus Torvalds, 2005 | |
5 | */ | |
4aab5b46 | 6 | #define NO_THE_INDEX_COMPATIBILITY_MACROS |
e83c5163 | 7 | #include "cache.h" |
bad68ec9 | 8 | #include "cache-tree.h" |
f35a6d3b | 9 | #include "refs.h" |
d616813d | 10 | #include "dir.h" |
041aee31 JH |
11 | #include "tree.h" |
12 | #include "commit.h" | |
39425819 | 13 | #include "blob.h" |
cfc5789a | 14 | #include "resolve-undo.h" |
6c9cd161 JH |
15 | #include "strbuf.h" |
16 | #include "varint.h" | |
5fc2fc8f | 17 | #include "split-index.h" |
c18b80a0 | 18 | #include "sigchain.h" |
bad68ec9 | 19 | |
25762726 BK |
20 | static struct cache_entry *refresh_cache_entry(struct cache_entry *ce, |
21 | unsigned int options); | |
87b29e5a | 22 | |
b60e188c TG |
23 | /* Mask for the name length in ce_flags in the on-disk index */ |
24 | ||
25 | #define CE_NAMEMASK (0x0fff) | |
26 | ||
bad68ec9 JH |
27 | /* Index extensions. |
28 | * | |
29 | * The first letter should be 'A'..'Z' for extensions that are not | |
30 | * necessary for a correct operation (i.e. optimization data). | |
31 | * When new extensions are added that _needs_ to be understood in | |
32 | * order to correctly interpret the index file, pick character that | |
33 | * is outside the range, to cause the reader to abort. | |
34 | */ | |
35 | ||
36 | #define CACHE_EXT(s) ( (s[0]<<24)|(s[1]<<16)|(s[2]<<8)|(s[3]) ) | |
37 | #define CACHE_EXT_TREE 0x54524545 /* "TREE" */ | |
b659b49b | 38 | #define CACHE_EXT_RESOLVE_UNDO 0x52455543 /* "REUC" */ |
5fc2fc8f NTND |
39 | #define CACHE_EXT_LINK 0x6c696e6b /* "link" */ |
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 NTND |
43 | CE_ENTRY_ADDED | CE_ENTRY_REMOVED | CE_ENTRY_CHANGED | \ |
44 | SPLIT_INDEX_ORDERED) | |
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); |
81dc2307 PB |
80 | remove_index_entry_at(istate, nr); |
81 | add_index_entry(istate, new, ADD_CACHE_OK_TO_ADD|ADD_CACHE_OK_TO_REPLACE); | |
82 | } | |
83 | ||
c21d39d7 MH |
84 | void fill_stat_data(struct stat_data *sd, struct stat *st) |
85 | { | |
86 | sd->sd_ctime.sec = (unsigned int)st->st_ctime; | |
87 | sd->sd_mtime.sec = (unsigned int)st->st_mtime; | |
88 | sd->sd_ctime.nsec = ST_CTIME_NSEC(*st); | |
89 | sd->sd_mtime.nsec = ST_MTIME_NSEC(*st); | |
90 | sd->sd_dev = st->st_dev; | |
91 | sd->sd_ino = st->st_ino; | |
92 | sd->sd_uid = st->st_uid; | |
93 | sd->sd_gid = st->st_gid; | |
94 | sd->sd_size = st->st_size; | |
95 | } | |
96 | ||
97 | int match_stat_data(const struct stat_data *sd, struct stat *st) | |
98 | { | |
99 | int changed = 0; | |
100 | ||
101 | if (sd->sd_mtime.sec != (unsigned int)st->st_mtime) | |
102 | changed |= MTIME_CHANGED; | |
103 | if (trust_ctime && check_stat && | |
104 | sd->sd_ctime.sec != (unsigned int)st->st_ctime) | |
105 | changed |= CTIME_CHANGED; | |
106 | ||
107 | #ifdef USE_NSEC | |
108 | if (check_stat && sd->sd_mtime.nsec != ST_MTIME_NSEC(*st)) | |
109 | changed |= MTIME_CHANGED; | |
110 | if (trust_ctime && check_stat && | |
111 | sd->sd_ctime.nsec != ST_CTIME_NSEC(*st)) | |
112 | changed |= CTIME_CHANGED; | |
113 | #endif | |
114 | ||
115 | if (check_stat) { | |
116 | if (sd->sd_uid != (unsigned int) st->st_uid || | |
117 | sd->sd_gid != (unsigned int) st->st_gid) | |
118 | changed |= OWNER_CHANGED; | |
119 | if (sd->sd_ino != (unsigned int) st->st_ino) | |
120 | changed |= INODE_CHANGED; | |
121 | } | |
122 | ||
123 | #ifdef USE_STDEV | |
124 | /* | |
125 | * st_dev breaks on network filesystems where different | |
126 | * clients will have different views of what "device" | |
127 | * the filesystem is on | |
128 | */ | |
129 | if (check_stat && sd->sd_dev != (unsigned int) st->st_dev) | |
130 | changed |= INODE_CHANGED; | |
131 | #endif | |
132 | ||
133 | if (sd->sd_size != (unsigned int) st->st_size) | |
134 | changed |= DATA_CHANGED; | |
135 | ||
136 | return changed; | |
137 | } | |
138 | ||
415e96c8 JH |
139 | /* |
140 | * This only updates the "non-critical" parts of the directory | |
141 | * cache, ie the parts that aren't tracked by GIT, and only used | |
142 | * to validate the cache. | |
143 | */ | |
144 | void fill_stat_cache_info(struct cache_entry *ce, struct stat *st) | |
145 | { | |
c21d39d7 | 146 | fill_stat_data(&ce->ce_stat_data, st); |
5f73076c JH |
147 | |
148 | if (assume_unchanged) | |
7a51ed66 | 149 | ce->ce_flags |= CE_VALID; |
eadb5831 JH |
150 | |
151 | if (S_ISREG(st->st_mode)) | |
152 | ce_mark_uptodate(ce); | |
415e96c8 JH |
153 | } |
154 | ||
21a6b9fa | 155 | static int ce_compare_data(const struct cache_entry *ce, struct stat *st) |
29e4d363 JH |
156 | { |
157 | int match = -1; | |
158 | int fd = open(ce->name, O_RDONLY); | |
159 | ||
160 | if (fd >= 0) { | |
161 | unsigned char sha1[20]; | |
c4ce46fc | 162 | if (!index_fd(sha1, fd, st, OBJ_BLOB, ce->name, 0)) |
a89fccd2 | 163 | match = hashcmp(sha1, ce->sha1); |
7f8508e8 | 164 | /* index_fd() closed the file descriptor already */ |
29e4d363 JH |
165 | } |
166 | return match; | |
167 | } | |
168 | ||
21a6b9fa | 169 | static int ce_compare_link(const struct cache_entry *ce, size_t expected_size) |
29e4d363 JH |
170 | { |
171 | int match = -1; | |
29e4d363 JH |
172 | void *buffer; |
173 | unsigned long size; | |
21666f1a | 174 | enum object_type type; |
a60272b3 | 175 | struct strbuf sb = STRBUF_INIT; |
29e4d363 | 176 | |
a60272b3 | 177 | if (strbuf_readlink(&sb, ce->name, expected_size)) |
29e4d363 | 178 | return -1; |
a60272b3 | 179 | |
21666f1a | 180 | buffer = read_sha1_file(ce->sha1, &type, &size); |
a60272b3 LT |
181 | if (buffer) { |
182 | if (size == sb.len) | |
183 | match = memcmp(buffer, sb.buf, size); | |
184 | free(buffer); | |
29e4d363 | 185 | } |
a60272b3 | 186 | strbuf_release(&sb); |
29e4d363 JH |
187 | return match; |
188 | } | |
189 | ||
21a6b9fa | 190 | static int ce_compare_gitlink(const struct cache_entry *ce) |
f35a6d3b LT |
191 | { |
192 | unsigned char sha1[20]; | |
193 | ||
194 | /* | |
195 | * We don't actually require that the .git directory | |
302b9282 | 196 | * under GITLINK directory be a valid git directory. It |
f35a6d3b LT |
197 | * might even be missing (in case nobody populated that |
198 | * sub-project). | |
199 | * | |
200 | * If so, we consider it always to match. | |
201 | */ | |
202 | if (resolve_gitlink_ref(ce->name, "HEAD", sha1) < 0) | |
203 | return 0; | |
204 | return hashcmp(sha1, ce->sha1); | |
205 | } | |
206 | ||
21a6b9fa | 207 | static int ce_modified_check_fs(const struct cache_entry *ce, struct stat *st) |
29e4d363 JH |
208 | { |
209 | switch (st->st_mode & S_IFMT) { | |
210 | case S_IFREG: | |
211 | if (ce_compare_data(ce, st)) | |
212 | return DATA_CHANGED; | |
213 | break; | |
214 | case S_IFLNK: | |
dc49cd76 | 215 | if (ce_compare_link(ce, xsize_t(st->st_size))) |
29e4d363 JH |
216 | return DATA_CHANGED; |
217 | break; | |
a8ee75bc | 218 | case S_IFDIR: |
7a51ed66 | 219 | if (S_ISGITLINK(ce->ce_mode)) |
c70115b4 | 220 | return ce_compare_gitlink(ce) ? DATA_CHANGED : 0; |
29e4d363 JH |
221 | default: |
222 | return TYPE_CHANGED; | |
223 | } | |
224 | return 0; | |
225 | } | |
226 | ||
21a6b9fa | 227 | static int ce_match_stat_basic(const struct cache_entry *ce, struct stat *st) |
734aab75 LT |
228 | { |
229 | unsigned int changed = 0; | |
230 | ||
7a51ed66 LT |
231 | if (ce->ce_flags & CE_REMOVE) |
232 | return MODE_CHANGED | DATA_CHANGED | TYPE_CHANGED; | |
233 | ||
234 | switch (ce->ce_mode & S_IFMT) { | |
8ae0a8c5 KS |
235 | case S_IFREG: |
236 | changed |= !S_ISREG(st->st_mode) ? TYPE_CHANGED : 0; | |
3e09cdfd JH |
237 | /* We consider only the owner x bit to be relevant for |
238 | * "mode changes" | |
239 | */ | |
240 | if (trust_executable_bit && | |
7a51ed66 | 241 | (0100 & (ce->ce_mode ^ st->st_mode))) |
ffbe1add | 242 | changed |= MODE_CHANGED; |
8ae0a8c5 KS |
243 | break; |
244 | case S_IFLNK: | |
78a8d641 JS |
245 | if (!S_ISLNK(st->st_mode) && |
246 | (has_symlinks || !S_ISREG(st->st_mode))) | |
247 | changed |= TYPE_CHANGED; | |
8ae0a8c5 | 248 | break; |
302b9282 | 249 | case S_IFGITLINK: |
c70115b4 | 250 | /* We ignore most of the st_xxx fields for gitlinks */ |
f35a6d3b LT |
251 | if (!S_ISDIR(st->st_mode)) |
252 | changed |= TYPE_CHANGED; | |
253 | else if (ce_compare_gitlink(ce)) | |
254 | changed |= DATA_CHANGED; | |
a8ee75bc | 255 | return changed; |
8ae0a8c5 | 256 | default: |
7a51ed66 | 257 | die("internal error: ce_mode is %o", ce->ce_mode); |
8ae0a8c5 | 258 | } |
2cb45e95 | 259 | |
c21d39d7 | 260 | changed |= match_stat_data(&ce->ce_stat_data, st); |
b0391890 | 261 | |
f49c2c22 | 262 | /* Racily smudged entry? */ |
c21d39d7 | 263 | if (!ce->ce_stat_data.sd_size) { |
f49c2c22 LT |
264 | if (!is_empty_blob_sha1(ce->sha1)) |
265 | changed |= DATA_CHANGED; | |
266 | } | |
267 | ||
407c8eb0 JH |
268 | return changed; |
269 | } | |
270 | ||
21a6b9fa RS |
271 | static int is_racy_timestamp(const struct index_state *istate, |
272 | const struct cache_entry *ce) | |
6d91da6d | 273 | { |
050288d5 | 274 | return (!S_ISGITLINK(ce->ce_mode) && |
fba2f38a KB |
275 | istate->timestamp.sec && |
276 | #ifdef USE_NSEC | |
277 | /* nanosecond timestamped files can also be racy! */ | |
c21d39d7 MH |
278 | (istate->timestamp.sec < ce->ce_stat_data.sd_mtime.sec || |
279 | (istate->timestamp.sec == ce->ce_stat_data.sd_mtime.sec && | |
280 | istate->timestamp.nsec <= ce->ce_stat_data.sd_mtime.nsec)) | |
fba2f38a | 281 | #else |
c21d39d7 | 282 | istate->timestamp.sec <= ce->ce_stat_data.sd_mtime.sec |
fba2f38a KB |
283 | #endif |
284 | ); | |
6d91da6d JH |
285 | } |
286 | ||
d1f128b0 | 287 | int ie_match_stat(const struct index_state *istate, |
21a6b9fa | 288 | const struct cache_entry *ce, struct stat *st, |
4bd5b7da | 289 | unsigned int options) |
407c8eb0 | 290 | { |
5f73076c | 291 | unsigned int changed; |
4bd5b7da | 292 | int ignore_valid = options & CE_MATCH_IGNORE_VALID; |
56cac48c | 293 | int ignore_skip_worktree = options & CE_MATCH_IGNORE_SKIP_WORKTREE; |
4bd5b7da | 294 | int assume_racy_is_modified = options & CE_MATCH_RACY_IS_DIRTY; |
5f73076c JH |
295 | |
296 | /* | |
297 | * If it's marked as always valid in the index, it's | |
298 | * valid whatever the checked-out copy says. | |
56cac48c NTND |
299 | * |
300 | * skip-worktree has the same effect with higher precedence | |
5f73076c | 301 | */ |
56cac48c NTND |
302 | if (!ignore_skip_worktree && ce_skip_worktree(ce)) |
303 | return 0; | |
7a51ed66 | 304 | if (!ignore_valid && (ce->ce_flags & CE_VALID)) |
5f73076c JH |
305 | return 0; |
306 | ||
331fcb59 JH |
307 | /* |
308 | * Intent-to-add entries have not been added, so the index entry | |
309 | * by definition never matches what is in the work tree until it | |
310 | * actually gets added. | |
311 | */ | |
312 | if (ce->ce_flags & CE_INTENT_TO_ADD) | |
313 | return DATA_CHANGED | TYPE_CHANGED | MODE_CHANGED; | |
314 | ||
5f73076c | 315 | changed = ce_match_stat_basic(ce, st); |
407c8eb0 | 316 | |
29e4d363 JH |
317 | /* |
318 | * Within 1 second of this sequence: | |
319 | * echo xyzzy >file && git-update-index --add file | |
320 | * running this command: | |
321 | * echo frotz >file | |
322 | * would give a falsely clean cache entry. The mtime and | |
323 | * length match the cache, and other stat fields do not change. | |
324 | * | |
325 | * We could detect this at update-index time (the cache entry | |
326 | * being registered/updated records the same time as "now") | |
327 | * and delay the return from git-update-index, but that would | |
328 | * effectively mean we can make at most one commit per second, | |
329 | * which is not acceptable. Instead, we check cache entries | |
330 | * whose mtime are the same as the index file timestamp more | |
5f73076c | 331 | * carefully than others. |
29e4d363 | 332 | */ |
6d91da6d | 333 | if (!changed && is_racy_timestamp(istate, ce)) { |
42f77406 JH |
334 | if (assume_racy_is_modified) |
335 | changed |= DATA_CHANGED; | |
336 | else | |
337 | changed |= ce_modified_check_fs(ce, st); | |
338 | } | |
b0391890 | 339 | |
29e4d363 | 340 | return changed; |
b0391890 JH |
341 | } |
342 | ||
d1f128b0 | 343 | int ie_modified(const struct index_state *istate, |
21a6b9fa RS |
344 | const struct cache_entry *ce, |
345 | struct stat *st, unsigned int options) | |
b0391890 | 346 | { |
29e4d363 | 347 | int changed, changed_fs; |
4bd5b7da JH |
348 | |
349 | changed = ie_match_stat(istate, ce, st, options); | |
b0391890 JH |
350 | if (!changed) |
351 | return 0; | |
b0391890 JH |
352 | /* |
353 | * If the mode or type has changed, there's no point in trying | |
354 | * to refresh the entry - it's not going to match | |
355 | */ | |
356 | if (changed & (MODE_CHANGED | TYPE_CHANGED)) | |
357 | return changed; | |
358 | ||
c70115b4 JH |
359 | /* |
360 | * Immediately after read-tree or update-index --cacheinfo, | |
361 | * the length field is zero, as we have never even read the | |
362 | * lstat(2) information once, and we cannot trust DATA_CHANGED | |
363 | * returned by ie_match_stat() which in turn was returned by | |
364 | * ce_match_stat_basic() to signal that the filesize of the | |
365 | * blob changed. We have to actually go to the filesystem to | |
366 | * see if the contents match, and if so, should answer "unchanged". | |
367 | * | |
368 | * The logic does not apply to gitlinks, as ce_match_stat_basic() | |
369 | * already has checked the actual HEAD from the filesystem in the | |
370 | * subproject. If ie_match_stat() already said it is different, | |
371 | * then we know it is. | |
b0391890 | 372 | */ |
c70115b4 | 373 | if ((changed & DATA_CHANGED) && |
c21d39d7 | 374 | (S_ISGITLINK(ce->ce_mode) || ce->ce_stat_data.sd_size != 0)) |
b0391890 JH |
375 | return changed; |
376 | ||
29e4d363 JH |
377 | changed_fs = ce_modified_check_fs(ce, st); |
378 | if (changed_fs) | |
379 | return changed | changed_fs; | |
b0391890 JH |
380 | return 0; |
381 | } | |
382 | ||
958ba6c9 LT |
383 | int base_name_compare(const char *name1, int len1, int mode1, |
384 | const char *name2, int len2, int mode2) | |
385 | { | |
386 | unsigned char c1, c2; | |
387 | int len = len1 < len2 ? len1 : len2; | |
388 | int cmp; | |
389 | ||
390 | cmp = memcmp(name1, name2, len); | |
391 | if (cmp) | |
392 | return cmp; | |
393 | c1 = name1[len]; | |
394 | c2 = name2[len]; | |
1833a925 | 395 | if (!c1 && S_ISDIR(mode1)) |
958ba6c9 | 396 | c1 = '/'; |
1833a925 | 397 | if (!c2 && S_ISDIR(mode2)) |
958ba6c9 LT |
398 | c2 = '/'; |
399 | return (c1 < c2) ? -1 : (c1 > c2) ? 1 : 0; | |
400 | } | |
401 | ||
0ab9e1e8 LT |
402 | /* |
403 | * df_name_compare() is identical to base_name_compare(), except it | |
404 | * compares conflicting directory/file entries as equal. Note that | |
405 | * while a directory name compares as equal to a regular file, they | |
406 | * then individually compare _differently_ to a filename that has | |
407 | * a dot after the basename (because '\0' < '.' < '/'). | |
408 | * | |
409 | * This is used by routines that want to traverse the git namespace | |
410 | * but then handle conflicting entries together when possible. | |
411 | */ | |
412 | int df_name_compare(const char *name1, int len1, int mode1, | |
413 | const char *name2, int len2, int mode2) | |
414 | { | |
415 | int len = len1 < len2 ? len1 : len2, cmp; | |
416 | unsigned char c1, c2; | |
417 | ||
418 | cmp = memcmp(name1, name2, len); | |
419 | if (cmp) | |
420 | return cmp; | |
421 | /* Directories and files compare equal (same length, same name) */ | |
422 | if (len1 == len2) | |
423 | return 0; | |
424 | c1 = name1[len]; | |
425 | if (!c1 && S_ISDIR(mode1)) | |
426 | c1 = '/'; | |
427 | c2 = name2[len]; | |
428 | if (!c2 && S_ISDIR(mode2)) | |
429 | c2 = '/'; | |
430 | if (c1 == '/' && !c2) | |
431 | return 0; | |
432 | if (c2 == '/' && !c1) | |
433 | return 0; | |
434 | return c1 - c2; | |
435 | } | |
436 | ||
ccdd4a0f | 437 | int name_compare(const char *name1, size_t len1, const char *name2, size_t len2) |
eb38c22f | 438 | { |
ccdd4a0f JM |
439 | size_t min_len = (len1 < len2) ? len1 : len2; |
440 | int cmp = memcmp(name1, name2, min_len); | |
eb38c22f LT |
441 | if (cmp) |
442 | return cmp; | |
443 | if (len1 < len2) | |
444 | return -1; | |
445 | if (len1 > len2) | |
446 | return 1; | |
ccdd4a0f JM |
447 | return 0; |
448 | } | |
449 | ||
450 | int cache_name_stage_compare(const char *name1, int len1, int stage1, const char *name2, int len2, int stage2) | |
451 | { | |
452 | int cmp; | |
453 | ||
454 | cmp = name_compare(name1, len1, name2, len2); | |
455 | if (cmp) | |
456 | return cmp; | |
5f73076c | 457 | |
b60e188c | 458 | if (stage1 < stage2) |
95fd5bf8 | 459 | return -1; |
b60e188c | 460 | if (stage1 > stage2) |
95fd5bf8 | 461 | return 1; |
eb38c22f LT |
462 | return 0; |
463 | } | |
464 | ||
357e9c69 | 465 | static int index_name_stage_pos(const struct index_state *istate, const char *name, int namelen, int stage) |
eb38c22f LT |
466 | { |
467 | int first, last; | |
468 | ||
469 | first = 0; | |
4aab5b46 | 470 | last = istate->cache_nr; |
eb38c22f LT |
471 | while (last > first) { |
472 | int next = (last + first) >> 1; | |
4aab5b46 | 473 | struct cache_entry *ce = istate->cache[next]; |
b60e188c | 474 | int cmp = cache_name_stage_compare(name, namelen, stage, ce->name, ce_namelen(ce), ce_stage(ce)); |
eb38c22f | 475 | if (!cmp) |
76e7f4ec | 476 | return next; |
eb38c22f LT |
477 | if (cmp < 0) { |
478 | last = next; | |
479 | continue; | |
480 | } | |
481 | first = next+1; | |
482 | } | |
76e7f4ec | 483 | return -first-1; |
eb38c22f LT |
484 | } |
485 | ||
b60e188c TG |
486 | int index_name_pos(const struct index_state *istate, const char *name, int namelen) |
487 | { | |
488 | return index_name_stage_pos(istate, name, namelen, 0); | |
489 | } | |
490 | ||
7b937ca3 | 491 | /* Remove entry, return true if there are more entries to go.. */ |
4aab5b46 | 492 | int remove_index_entry_at(struct index_state *istate, int pos) |
7b937ca3 | 493 | { |
cf558704 LT |
494 | struct cache_entry *ce = istate->cache[pos]; |
495 | ||
cfc5789a | 496 | record_resolve_undo(istate, ce); |
2092678c | 497 | remove_name_hash(istate, ce); |
045113a5 | 498 | save_or_free_index_entry(istate, ce); |
e636a7b4 | 499 | istate->cache_changed |= CE_ENTRY_REMOVED; |
4aab5b46 JH |
500 | istate->cache_nr--; |
501 | if (pos >= istate->cache_nr) | |
7b937ca3 | 502 | return 0; |
4aab5b46 JH |
503 | memmove(istate->cache + pos, |
504 | istate->cache + pos + 1, | |
505 | (istate->cache_nr - pos) * sizeof(struct cache_entry *)); | |
7b937ca3 LT |
506 | return 1; |
507 | } | |
508 | ||
36419c8e | 509 | /* |
98e023de | 510 | * Remove all cache entries marked for removal, that is where |
36419c8e KB |
511 | * CE_REMOVE is set in ce_flags. This is much more effective than |
512 | * calling remove_index_entry_at() for each entry to be removed. | |
513 | */ | |
514 | void remove_marked_cache_entries(struct index_state *istate) | |
515 | { | |
516 | struct cache_entry **ce_array = istate->cache; | |
517 | unsigned int i, j; | |
518 | ||
519 | for (i = j = 0; i < istate->cache_nr; i++) { | |
5699d17e | 520 | if (ce_array[i]->ce_flags & CE_REMOVE) { |
2092678c | 521 | remove_name_hash(istate, ce_array[i]); |
045113a5 | 522 | save_or_free_index_entry(istate, ce_array[i]); |
5699d17e | 523 | } |
36419c8e KB |
524 | else |
525 | ce_array[j++] = ce_array[i]; | |
526 | } | |
ad837d9e NTND |
527 | if (j == istate->cache_nr) |
528 | return; | |
e636a7b4 | 529 | istate->cache_changed |= CE_ENTRY_REMOVED; |
36419c8e KB |
530 | istate->cache_nr = j; |
531 | } | |
532 | ||
4aab5b46 | 533 | int remove_file_from_index(struct index_state *istate, const char *path) |
197ee8c9 | 534 | { |
4aab5b46 | 535 | int pos = index_name_pos(istate, path, strlen(path)); |
c4e3cca1 JH |
536 | if (pos < 0) |
537 | pos = -pos-1; | |
a5400efe | 538 | cache_tree_invalidate_path(istate, path); |
4aab5b46 JH |
539 | while (pos < istate->cache_nr && !strcmp(istate->cache[pos]->name, path)) |
540 | remove_index_entry_at(istate, pos); | |
197ee8c9 LT |
541 | return 0; |
542 | } | |
543 | ||
20314271 JS |
544 | static int compare_name(struct cache_entry *ce, const char *path, int namelen) |
545 | { | |
546 | return namelen != ce_namelen(ce) || memcmp(path, ce->name, namelen); | |
547 | } | |
548 | ||
549 | static int index_name_pos_also_unmerged(struct index_state *istate, | |
550 | const char *path, int namelen) | |
551 | { | |
552 | int pos = index_name_pos(istate, path, namelen); | |
553 | struct cache_entry *ce; | |
554 | ||
555 | if (pos >= 0) | |
556 | return pos; | |
557 | ||
558 | /* maybe unmerged? */ | |
559 | pos = -1 - pos; | |
560 | if (pos >= istate->cache_nr || | |
561 | compare_name((ce = istate->cache[pos]), path, namelen)) | |
562 | return -1; | |
563 | ||
564 | /* order of preference: stage 2, 1, 3 */ | |
565 | if (ce_stage(ce) == 1 && pos + 1 < istate->cache_nr && | |
566 | ce_stage((ce = istate->cache[pos + 1])) == 2 && | |
567 | !compare_name(ce, path, namelen)) | |
568 | pos++; | |
569 | return pos; | |
570 | } | |
571 | ||
1102952b LT |
572 | static int different_name(struct cache_entry *ce, struct cache_entry *alias) |
573 | { | |
574 | int len = ce_namelen(ce); | |
575 | return ce_namelen(alias) != len || memcmp(ce->name, alias->name, len); | |
576 | } | |
577 | ||
578 | /* | |
579 | * If we add a filename that aliases in the cache, we will use the | |
580 | * name that we already have - but we don't want to update the same | |
581 | * alias twice, because that implies that there were actually two | |
582 | * different files with aliasing names! | |
583 | * | |
584 | * So we use the CE_ADDED flag to verify that the alias was an old | |
585 | * one before we accept it as | |
586 | */ | |
045113a5 NTND |
587 | static struct cache_entry *create_alias_ce(struct index_state *istate, |
588 | struct cache_entry *ce, | |
589 | struct cache_entry *alias) | |
1102952b LT |
590 | { |
591 | int len; | |
592 | struct cache_entry *new; | |
593 | ||
594 | if (alias->ce_flags & CE_ADDED) | |
595 | die("Will not add file alias '%s' ('%s' already exists in index)", ce->name, alias->name); | |
596 | ||
597 | /* Ok, create the new entry using the name of the existing alias */ | |
598 | len = ce_namelen(alias); | |
599 | new = xcalloc(1, cache_entry_size(len)); | |
600 | memcpy(new->name, alias->name, len); | |
601 | copy_cache_entry(new, ce); | |
045113a5 | 602 | save_or_free_index_entry(istate, ce); |
1102952b LT |
603 | return new; |
604 | } | |
605 | ||
b4b313f9 | 606 | void set_object_name_for_intent_to_add_entry(struct cache_entry *ce) |
39425819 JH |
607 | { |
608 | unsigned char sha1[20]; | |
609 | if (write_sha1_file("", 0, blob_type, sha1)) | |
610 | die("cannot create an empty blob in the object database"); | |
611 | hashcpy(ce->sha1, sha1); | |
612 | } | |
613 | ||
38ed1d89 | 614 | int add_to_index(struct index_state *istate, const char *path, struct stat *st, int flags) |
11be42a4 | 615 | { |
38ed1d89 | 616 | int size, namelen, was_same; |
d177cab0 | 617 | mode_t st_mode = st->st_mode; |
6835550d | 618 | struct cache_entry *ce, *alias; |
56cac48c | 619 | unsigned ce_option = CE_MATCH_IGNORE_VALID|CE_MATCH_IGNORE_SKIP_WORKTREE|CE_MATCH_RACY_IS_DIRTY; |
38ed1d89 JH |
620 | int verbose = flags & (ADD_CACHE_VERBOSE | ADD_CACHE_PRETEND); |
621 | int pretend = flags & ADD_CACHE_PRETEND; | |
39425819 JH |
622 | int intent_only = flags & ADD_CACHE_INTENT; |
623 | int add_option = (ADD_CACHE_OK_TO_ADD|ADD_CACHE_OK_TO_REPLACE| | |
624 | (intent_only ? ADD_CACHE_NEW_ONLY : 0)); | |
11be42a4 | 625 | |
d177cab0 | 626 | if (!S_ISREG(st_mode) && !S_ISLNK(st_mode) && !S_ISDIR(st_mode)) |
960b8ad1 | 627 | return error("%s: can only add regular files, symbolic links or git-directories", path); |
11be42a4 JS |
628 | |
629 | namelen = strlen(path); | |
d177cab0 | 630 | if (S_ISDIR(st_mode)) { |
09595258 LT |
631 | while (namelen && path[namelen-1] == '/') |
632 | namelen--; | |
633 | } | |
11be42a4 JS |
634 | size = cache_entry_size(namelen); |
635 | ce = xcalloc(1, size); | |
636 | memcpy(ce->name, path, namelen); | |
b60e188c | 637 | ce->ce_namelen = namelen; |
39425819 JH |
638 | if (!intent_only) |
639 | fill_stat_cache_info(ce, st); | |
388b2acd JH |
640 | else |
641 | ce->ce_flags |= CE_INTENT_TO_ADD; | |
11be42a4 | 642 | |
78a8d641 | 643 | if (trust_executable_bit && has_symlinks) |
d177cab0 | 644 | ce->ce_mode = create_ce_mode(st_mode); |
185c975f | 645 | else { |
78a8d641 JS |
646 | /* If there is an existing entry, pick the mode bits and type |
647 | * from it, otherwise assume unexecutable regular file. | |
11be42a4 | 648 | */ |
185c975f | 649 | struct cache_entry *ent; |
20314271 | 650 | int pos = index_name_pos_also_unmerged(istate, path, namelen); |
185c975f | 651 | |
4aab5b46 | 652 | ent = (0 <= pos) ? istate->cache[pos] : NULL; |
d177cab0 | 653 | ce->ce_mode = ce_mode_from_stat(ent, st_mode); |
11be42a4 JS |
654 | } |
655 | ||
dc1ae704 JJ |
656 | /* When core.ignorecase=true, determine if a directory of the same name but differing |
657 | * case already exists within the Git repository. If it does, ensure the directory | |
658 | * case of the file being added to the repository matches (is folded into) the existing | |
659 | * entry's directory case. | |
660 | */ | |
661 | if (ignore_case) { | |
662 | const char *startPtr = ce->name; | |
663 | const char *ptr = startPtr; | |
664 | while (*ptr) { | |
665 | while (*ptr && *ptr != '/') | |
666 | ++ptr; | |
667 | if (*ptr == '/') { | |
668 | struct cache_entry *foundce; | |
669 | ++ptr; | |
d28eec26 | 670 | foundce = index_dir_exists(istate, ce->name, ptr - ce->name - 1); |
dc1ae704 JJ |
671 | if (foundce) { |
672 | memcpy((void *)startPtr, foundce->name + (startPtr - ce->name), ptr - startPtr); | |
673 | startPtr = ptr; | |
674 | } | |
675 | } | |
676 | } | |
677 | } | |
678 | ||
ebbd7439 | 679 | alias = index_file_exists(istate, ce->name, ce_namelen(ce), ignore_case); |
d177cab0 | 680 | if (alias && !ce_stage(alias) && !ie_match_stat(istate, alias, st, ce_option)) { |
0781b8a9 JH |
681 | /* Nothing changed, really */ |
682 | free(ce); | |
125fd984 JH |
683 | if (!S_ISGITLINK(alias->ce_mode)) |
684 | ce_mark_uptodate(alias); | |
1102952b | 685 | alias->ce_flags |= CE_ADDED; |
0781b8a9 JH |
686 | return 0; |
687 | } | |
39425819 | 688 | if (!intent_only) { |
c4ce46fc | 689 | if (index_path(ce->sha1, path, st, HASH_WRITE_OBJECT)) |
39425819 JH |
690 | return error("unable to index file %s", path); |
691 | } else | |
b4b313f9 | 692 | set_object_name_for_intent_to_add_entry(ce); |
39425819 | 693 | |
1102952b | 694 | if (ignore_case && alias && different_name(ce, alias)) |
045113a5 | 695 | ce = create_alias_ce(istate, ce, alias); |
1102952b | 696 | ce->ce_flags |= CE_ADDED; |
38ed1d89 | 697 | |
3bf0dd1f | 698 | /* It was suspected to be racily clean, but it turns out to be Ok */ |
38ed1d89 JH |
699 | was_same = (alias && |
700 | !ce_stage(alias) && | |
701 | !hashcmp(alias->sha1, ce->sha1) && | |
702 | ce->ce_mode == alias->ce_mode); | |
703 | ||
704 | if (pretend) | |
705 | ; | |
39425819 | 706 | else if (add_index_entry(istate, ce, add_option)) |
960b8ad1 | 707 | return error("unable to add %s to index",path); |
38ed1d89 | 708 | if (verbose && !was_same) |
11be42a4 | 709 | printf("add '%s'\n", path); |
11be42a4 JS |
710 | return 0; |
711 | } | |
712 | ||
38ed1d89 | 713 | int add_file_to_index(struct index_state *istate, const char *path, int flags) |
d177cab0 LT |
714 | { |
715 | struct stat st; | |
716 | if (lstat(path, &st)) | |
d824cbba | 717 | die_errno("unable to stat '%s'", path); |
38ed1d89 | 718 | return add_to_index(istate, path, &st, flags); |
d177cab0 LT |
719 | } |
720 | ||
6640f881 CR |
721 | struct cache_entry *make_cache_entry(unsigned int mode, |
722 | const unsigned char *sha1, const char *path, int stage, | |
25762726 | 723 | unsigned int refresh_options) |
6640f881 CR |
724 | { |
725 | int size, len; | |
726 | struct cache_entry *ce; | |
727 | ||
7e7abea9 DP |
728 | if (!verify_path(path)) { |
729 | error("Invalid path '%s'", path); | |
6640f881 | 730 | return NULL; |
7e7abea9 | 731 | } |
6640f881 CR |
732 | |
733 | len = strlen(path); | |
734 | size = cache_entry_size(len); | |
735 | ce = xcalloc(1, size); | |
736 | ||
737 | hashcpy(ce->sha1, sha1); | |
738 | memcpy(ce->name, path, len); | |
b60e188c TG |
739 | ce->ce_flags = create_ce_flags(stage); |
740 | ce->ce_namelen = len; | |
6640f881 CR |
741 | ce->ce_mode = create_ce_mode(mode); |
742 | ||
25762726 | 743 | return refresh_cache_entry(ce, refresh_options); |
6640f881 CR |
744 | } |
745 | ||
9c5e6c80 | 746 | int ce_same_name(const struct cache_entry *a, const struct cache_entry *b) |
7b937ca3 LT |
747 | { |
748 | int len = ce_namelen(a); | |
749 | return ce_namelen(b) == len && !memcmp(a->name, b->name, len); | |
750 | } | |
751 | ||
8dcf39c4 LT |
752 | /* |
753 | * We fundamentally don't like some paths: we don't want | |
754 | * dot or dot-dot anywhere, and for obvious reasons don't | |
755 | * want to recurse into ".git" either. | |
756 | * | |
757 | * Also, we don't want double slashes or slashes at the | |
758 | * end that can make pathnames ambiguous. | |
759 | */ | |
760 | static int verify_dotfile(const char *rest) | |
761 | { | |
762 | /* | |
763 | * The first character was '.', but that | |
764 | * has already been discarded, we now test | |
765 | * the rest. | |
766 | */ | |
e0f530ff | 767 | |
8dcf39c4 | 768 | /* "." is not allowed */ |
e0f530ff | 769 | if (*rest == '\0' || is_dir_sep(*rest)) |
8dcf39c4 LT |
770 | return 0; |
771 | ||
e0f530ff | 772 | switch (*rest) { |
8dcf39c4 LT |
773 | /* |
774 | * ".git" followed by NUL or slash is bad. This | |
775 | * shares the path end test with the ".." case. | |
776 | */ | |
777 | case 'g': | |
778 | if (rest[1] != 'i') | |
779 | break; | |
780 | if (rest[2] != 't') | |
781 | break; | |
782 | rest += 2; | |
783 | /* fallthrough */ | |
784 | case '.': | |
e0f530ff | 785 | if (rest[1] == '\0' || is_dir_sep(rest[1])) |
8dcf39c4 LT |
786 | return 0; |
787 | } | |
788 | return 1; | |
789 | } | |
790 | ||
791 | int verify_path(const char *path) | |
792 | { | |
793 | char c; | |
794 | ||
56948cb6 EFL |
795 | if (has_dos_drive_prefix(path)) |
796 | return 0; | |
797 | ||
8dcf39c4 LT |
798 | goto inside; |
799 | for (;;) { | |
800 | if (!c) | |
801 | return 1; | |
56948cb6 | 802 | if (is_dir_sep(c)) { |
8dcf39c4 LT |
803 | inside: |
804 | c = *path++; | |
3bdf09c7 JH |
805 | if ((c == '.' && !verify_dotfile(path)) || |
806 | is_dir_sep(c) || c == '\0') | |
807 | return 0; | |
8dcf39c4 LT |
808 | } |
809 | c = *path++; | |
810 | } | |
811 | } | |
812 | ||
12676608 LT |
813 | /* |
814 | * Do we have another file that has the beginning components being a | |
815 | * proper superset of the name we're trying to add? | |
0f1e4f04 | 816 | */ |
4aab5b46 JH |
817 | static int has_file_name(struct index_state *istate, |
818 | const struct cache_entry *ce, int pos, int ok_to_replace) | |
0f1e4f04 | 819 | { |
12676608 LT |
820 | int retval = 0; |
821 | int len = ce_namelen(ce); | |
b155725d | 822 | int stage = ce_stage(ce); |
12676608 | 823 | const char *name = ce->name; |
0f1e4f04 | 824 | |
4aab5b46 JH |
825 | while (pos < istate->cache_nr) { |
826 | struct cache_entry *p = istate->cache[pos++]; | |
0f1e4f04 | 827 | |
12676608 | 828 | if (len >= ce_namelen(p)) |
0f1e4f04 | 829 | break; |
12676608 LT |
830 | if (memcmp(name, p->name, len)) |
831 | break; | |
b155725d JH |
832 | if (ce_stage(p) != stage) |
833 | continue; | |
12676608 LT |
834 | if (p->name[len] != '/') |
835 | continue; | |
7a51ed66 | 836 | if (p->ce_flags & CE_REMOVE) |
21cd8d00 | 837 | continue; |
12676608 LT |
838 | retval = -1; |
839 | if (!ok_to_replace) | |
840 | break; | |
4aab5b46 | 841 | remove_index_entry_at(istate, --pos); |
0f1e4f04 | 842 | } |
12676608 LT |
843 | return retval; |
844 | } | |
0f1e4f04 | 845 | |
12676608 LT |
846 | /* |
847 | * Do we have another file with a pathname that is a proper | |
848 | * subset of the name we're trying to add? | |
849 | */ | |
4aab5b46 JH |
850 | static int has_dir_name(struct index_state *istate, |
851 | const struct cache_entry *ce, int pos, int ok_to_replace) | |
12676608 LT |
852 | { |
853 | int retval = 0; | |
b155725d | 854 | int stage = ce_stage(ce); |
12676608 LT |
855 | const char *name = ce->name; |
856 | const char *slash = name + ce_namelen(ce); | |
0f1e4f04 | 857 | |
12676608 LT |
858 | for (;;) { |
859 | int len; | |
0f1e4f04 | 860 | |
12676608 LT |
861 | for (;;) { |
862 | if (*--slash == '/') | |
863 | break; | |
864 | if (slash <= ce->name) | |
865 | return retval; | |
866 | } | |
867 | len = slash - name; | |
0f1e4f04 | 868 | |
b60e188c | 869 | pos = index_name_stage_pos(istate, name, len, stage); |
12676608 | 870 | if (pos >= 0) { |
21cd8d00 JH |
871 | /* |
872 | * Found one, but not so fast. This could | |
873 | * be a marker that says "I was here, but | |
874 | * I am being removed". Such an entry is | |
875 | * not a part of the resulting tree, and | |
876 | * it is Ok to have a directory at the same | |
877 | * path. | |
878 | */ | |
077c48df | 879 | if (!(istate->cache[pos]->ce_flags & CE_REMOVE)) { |
21cd8d00 JH |
880 | retval = -1; |
881 | if (!ok_to_replace) | |
882 | break; | |
4aab5b46 | 883 | remove_index_entry_at(istate, pos); |
21cd8d00 JH |
884 | continue; |
885 | } | |
12676608 | 886 | } |
21cd8d00 JH |
887 | else |
888 | pos = -pos-1; | |
12676608 LT |
889 | |
890 | /* | |
891 | * Trivial optimization: if we find an entry that | |
892 | * already matches the sub-directory, then we know | |
b155725d | 893 | * we're ok, and we can exit. |
12676608 | 894 | */ |
4aab5b46 JH |
895 | while (pos < istate->cache_nr) { |
896 | struct cache_entry *p = istate->cache[pos]; | |
b155725d JH |
897 | if ((ce_namelen(p) <= len) || |
898 | (p->name[len] != '/') || | |
899 | memcmp(p->name, name, len)) | |
900 | break; /* not our subdirectory */ | |
077c48df JH |
901 | if (ce_stage(p) == stage && !(p->ce_flags & CE_REMOVE)) |
902 | /* | |
903 | * p is at the same stage as our entry, and | |
b155725d JH |
904 | * is a subdirectory of what we are looking |
905 | * at, so we cannot have conflicts at our | |
906 | * level or anything shorter. | |
907 | */ | |
908 | return retval; | |
909 | pos++; | |
192268c1 | 910 | } |
0f1e4f04 | 911 | } |
12676608 LT |
912 | return retval; |
913 | } | |
914 | ||
915 | /* We may be in a situation where we already have path/file and path | |
916 | * is being added, or we already have path and path/file is being | |
917 | * added. Either one would result in a nonsense tree that has path | |
918 | * twice when git-write-tree tries to write it out. Prevent it. | |
a6080a0a | 919 | * |
12676608 LT |
920 | * If ok-to-replace is specified, we remove the conflicting entries |
921 | * from the cache so the caller should recompute the insert position. | |
922 | * When this happens, we return non-zero. | |
923 | */ | |
4aab5b46 JH |
924 | static int check_file_directory_conflict(struct index_state *istate, |
925 | const struct cache_entry *ce, | |
926 | int pos, int ok_to_replace) | |
12676608 | 927 | { |
21cd8d00 JH |
928 | int retval; |
929 | ||
930 | /* | |
931 | * When ce is an "I am going away" entry, we allow it to be added | |
932 | */ | |
7a51ed66 | 933 | if (ce->ce_flags & CE_REMOVE) |
21cd8d00 JH |
934 | return 0; |
935 | ||
12676608 LT |
936 | /* |
937 | * We check if the path is a sub-path of a subsequent pathname | |
938 | * first, since removing those will not change the position | |
21cd8d00 | 939 | * in the array. |
12676608 | 940 | */ |
4aab5b46 | 941 | retval = has_file_name(istate, ce, pos, ok_to_replace); |
21cd8d00 | 942 | |
12676608 LT |
943 | /* |
944 | * Then check if the path might have a clashing sub-directory | |
945 | * before it. | |
946 | */ | |
4aab5b46 | 947 | return retval + has_dir_name(istate, ce, pos, ok_to_replace); |
0f1e4f04 JH |
948 | } |
949 | ||
af3785dc | 950 | static int add_index_entry_with_check(struct index_state *istate, struct cache_entry *ce, int option) |
197ee8c9 LT |
951 | { |
952 | int pos; | |
192268c1 JH |
953 | int ok_to_add = option & ADD_CACHE_OK_TO_ADD; |
954 | int ok_to_replace = option & ADD_CACHE_OK_TO_REPLACE; | |
b155725d | 955 | int skip_df_check = option & ADD_CACHE_SKIP_DFCHECK; |
39425819 | 956 | int new_only = option & ADD_CACHE_NEW_ONLY; |
5f73076c | 957 | |
ce7c614b NTND |
958 | if (!(option & ADD_CACHE_KEEP_CACHE_TREE)) |
959 | cache_tree_invalidate_path(istate, ce->name); | |
b60e188c | 960 | pos = index_name_stage_pos(istate, ce->name, ce_namelen(ce), ce_stage(ce)); |
197ee8c9 | 961 | |
3e09cdfd | 962 | /* existing match? Just replace it. */ |
76e7f4ec | 963 | if (pos >= 0) { |
39425819 JH |
964 | if (!new_only) |
965 | replace_index_entry(istate, pos, ce); | |
197ee8c9 LT |
966 | return 0; |
967 | } | |
76e7f4ec | 968 | pos = -pos-1; |
197ee8c9 | 969 | |
7b937ca3 LT |
970 | /* |
971 | * Inserting a merged entry ("stage 0") into the index | |
972 | * will always replace all non-merged entries.. | |
973 | */ | |
4aab5b46 JH |
974 | if (pos < istate->cache_nr && ce_stage(ce) == 0) { |
975 | while (ce_same_name(istate->cache[pos], ce)) { | |
7b937ca3 | 976 | ok_to_add = 1; |
4aab5b46 | 977 | if (!remove_index_entry_at(istate, pos)) |
7b937ca3 LT |
978 | break; |
979 | } | |
980 | } | |
981 | ||
121481ab LT |
982 | if (!ok_to_add) |
983 | return -1; | |
8dcf39c4 | 984 | if (!verify_path(ce->name)) |
7e7abea9 | 985 | return error("Invalid path '%s'", ce->name); |
121481ab | 986 | |
3e09cdfd | 987 | if (!skip_df_check && |
4aab5b46 | 988 | check_file_directory_conflict(istate, ce, pos, ok_to_replace)) { |
192268c1 | 989 | if (!ok_to_replace) |
4aab5b46 JH |
990 | return error("'%s' appears as both a file and as a directory", |
991 | ce->name); | |
b60e188c | 992 | pos = index_name_stage_pos(istate, ce->name, ce_namelen(ce), ce_stage(ce)); |
192268c1 JH |
993 | pos = -pos-1; |
994 | } | |
af3785dc JH |
995 | return pos + 1; |
996 | } | |
997 | ||
998 | int add_index_entry(struct index_state *istate, struct cache_entry *ce, int option) | |
999 | { | |
1000 | int pos; | |
1001 | ||
1002 | if (option & ADD_CACHE_JUST_APPEND) | |
1003 | pos = istate->cache_nr; | |
1004 | else { | |
1005 | int ret; | |
1006 | ret = add_index_entry_with_check(istate, ce, option); | |
1007 | if (ret <= 0) | |
1008 | return ret; | |
1009 | pos = ret - 1; | |
1010 | } | |
0f1e4f04 | 1011 | |
197ee8c9 | 1012 | /* Make sure the array is big enough .. */ |
999f5660 | 1013 | ALLOC_GROW(istate->cache, istate->cache_nr + 1, istate->cache_alloc); |
197ee8c9 LT |
1014 | |
1015 | /* Add it in.. */ | |
4aab5b46 | 1016 | istate->cache_nr++; |
af3785dc | 1017 | if (istate->cache_nr > pos + 1) |
4aab5b46 JH |
1018 | memmove(istate->cache + pos + 1, |
1019 | istate->cache + pos, | |
1020 | (istate->cache_nr - pos - 1) * sizeof(ce)); | |
cf558704 | 1021 | set_index_entry(istate, pos, ce); |
e636a7b4 | 1022 | istate->cache_changed |= CE_ENTRY_ADDED; |
197ee8c9 LT |
1023 | return 0; |
1024 | } | |
1025 | ||
405e5b2f LT |
1026 | /* |
1027 | * "refresh" does not calculate a new sha1 file or bring the | |
1028 | * cache up-to-date for mode/content changes. But what it | |
1029 | * _does_ do is to "re-match" the stat information of a file | |
1030 | * with the cache, so that you can refresh the cache for a | |
1031 | * file that hasn't been changed but where the stat entry is | |
1032 | * out of date. | |
1033 | * | |
1034 | * For example, you'd want to do this after doing a "git-read-tree", | |
1035 | * to link up the stat cache details with the proper files. | |
1036 | */ | |
4aab5b46 | 1037 | static struct cache_entry *refresh_cache_ent(struct index_state *istate, |
4bd5b7da | 1038 | struct cache_entry *ce, |
d05e6970 JK |
1039 | unsigned int options, int *err, |
1040 | int *changed_ret) | |
405e5b2f LT |
1041 | { |
1042 | struct stat st; | |
1043 | struct cache_entry *updated; | |
1044 | int changed, size; | |
25762726 | 1045 | int refresh = options & CE_MATCH_REFRESH; |
4bd5b7da | 1046 | int ignore_valid = options & CE_MATCH_IGNORE_VALID; |
56cac48c | 1047 | int ignore_skip_worktree = options & CE_MATCH_IGNORE_SKIP_WORKTREE; |
2e2e7ec1 | 1048 | int ignore_missing = options & CE_MATCH_IGNORE_MISSING; |
405e5b2f | 1049 | |
25762726 | 1050 | if (!refresh || ce_uptodate(ce)) |
eadb5831 JH |
1051 | return ce; |
1052 | ||
aa9349d4 | 1053 | /* |
56cac48c NTND |
1054 | * CE_VALID or CE_SKIP_WORKTREE means the user promised us |
1055 | * that the change to the work tree does not matter and told | |
1056 | * us not to worry. | |
aa9349d4 | 1057 | */ |
56cac48c NTND |
1058 | if (!ignore_skip_worktree && ce_skip_worktree(ce)) { |
1059 | ce_mark_uptodate(ce); | |
1060 | return ce; | |
1061 | } | |
aa9349d4 MSO |
1062 | if (!ignore_valid && (ce->ce_flags & CE_VALID)) { |
1063 | ce_mark_uptodate(ce); | |
1064 | return ce; | |
1065 | } | |
1066 | ||
8fd2cb40 | 1067 | if (lstat(ce->name, &st) < 0) { |
2e2e7ec1 BK |
1068 | if (ignore_missing && errno == ENOENT) |
1069 | return ce; | |
ec0cc704 JH |
1070 | if (err) |
1071 | *err = errno; | |
8fd2cb40 JS |
1072 | return NULL; |
1073 | } | |
405e5b2f | 1074 | |
4bd5b7da | 1075 | changed = ie_match_stat(istate, ce, &st, options); |
d05e6970 JK |
1076 | if (changed_ret) |
1077 | *changed_ret = changed; | |
405e5b2f | 1078 | if (!changed) { |
4bd5b7da JH |
1079 | /* |
1080 | * The path is unchanged. If we were told to ignore | |
1081 | * valid bit, then we did the actual stat check and | |
1082 | * found that the entry is unmodified. If the entry | |
1083 | * is not marked VALID, this is the place to mark it | |
1084 | * valid again, under "assume unchanged" mode. | |
1085 | */ | |
1086 | if (ignore_valid && assume_unchanged && | |
7a51ed66 | 1087 | !(ce->ce_flags & CE_VALID)) |
405e5b2f | 1088 | ; /* mark this one VALID again */ |
eadb5831 JH |
1089 | else { |
1090 | /* | |
1091 | * We do not mark the index itself "modified" | |
1092 | * because CE_UPTODATE flag is in-core only; | |
1093 | * we are not going to write this change out. | |
1094 | */ | |
125fd984 JH |
1095 | if (!S_ISGITLINK(ce->ce_mode)) |
1096 | ce_mark_uptodate(ce); | |
8fd2cb40 | 1097 | return ce; |
eadb5831 | 1098 | } |
405e5b2f LT |
1099 | } |
1100 | ||
4bd5b7da | 1101 | if (ie_modified(istate, ce, &st, options)) { |
ec0cc704 JH |
1102 | if (err) |
1103 | *err = EINVAL; | |
8fd2cb40 JS |
1104 | return NULL; |
1105 | } | |
405e5b2f LT |
1106 | |
1107 | size = ce_size(ce); | |
1108 | updated = xmalloc(size); | |
1109 | memcpy(updated, ce, size); | |
1110 | fill_stat_cache_info(updated, &st); | |
4bd5b7da JH |
1111 | /* |
1112 | * If ignore_valid is not set, we should leave CE_VALID bit | |
1113 | * alone. Otherwise, paths marked with --no-assume-unchanged | |
1114 | * (i.e. things to be edited) will reacquire CE_VALID bit | |
1115 | * automatically, which is not really what we want. | |
405e5b2f | 1116 | */ |
4bd5b7da | 1117 | if (!ignore_valid && assume_unchanged && |
7a51ed66 LT |
1118 | !(ce->ce_flags & CE_VALID)) |
1119 | updated->ce_flags &= ~CE_VALID; | |
405e5b2f | 1120 | |
e636a7b4 | 1121 | /* istate->cache_changed is updated in the caller */ |
405e5b2f LT |
1122 | return updated; |
1123 | } | |
1124 | ||
3deffc52 | 1125 | static void show_file(const char * fmt, const char * name, int in_porcelain, |
046613c5 | 1126 | int * first, const char *header_msg) |
3deffc52 MM |
1127 | { |
1128 | if (in_porcelain && *first && header_msg) { | |
1129 | printf("%s\n", header_msg); | |
cd2b8ae9 | 1130 | *first = 0; |
3deffc52 MM |
1131 | } |
1132 | printf(fmt, name); | |
1133 | } | |
1134 | ||
9b2d6149 NTND |
1135 | int refresh_index(struct index_state *istate, unsigned int flags, |
1136 | const struct pathspec *pathspec, | |
046613c5 | 1137 | char *seen, const char *header_msg) |
405e5b2f LT |
1138 | { |
1139 | int i; | |
1140 | int has_errors = 0; | |
1141 | int really = (flags & REFRESH_REALLY) != 0; | |
1142 | int allow_unmerged = (flags & REFRESH_UNMERGED) != 0; | |
1143 | int quiet = (flags & REFRESH_QUIET) != 0; | |
1144 | int not_new = (flags & REFRESH_IGNORE_MISSING) != 0; | |
5fdeacb0 | 1145 | int ignore_submodules = (flags & REFRESH_IGNORE_SUBMODULES) != 0; |
3deffc52 MM |
1146 | int first = 1; |
1147 | int in_porcelain = (flags & REFRESH_IN_PORCELAIN); | |
25762726 BK |
1148 | unsigned int options = (CE_MATCH_REFRESH | |
1149 | (really ? CE_MATCH_IGNORE_VALID : 0) | | |
2e2e7ec1 | 1150 | (not_new ? CE_MATCH_IGNORE_MISSING : 0)); |
4bd4e730 | 1151 | const char *modified_fmt; |
73b7eae6 JK |
1152 | const char *deleted_fmt; |
1153 | const char *typechange_fmt; | |
1154 | const char *added_fmt; | |
4bd4e730 | 1155 | const char *unmerged_fmt; |
405e5b2f | 1156 | |
4bd4e730 | 1157 | modified_fmt = (in_porcelain ? "M\t%s\n" : "%s: needs update\n"); |
73b7eae6 JK |
1158 | deleted_fmt = (in_porcelain ? "D\t%s\n" : "%s: needs update\n"); |
1159 | typechange_fmt = (in_porcelain ? "T\t%s\n" : "%s needs update\n"); | |
1160 | added_fmt = (in_porcelain ? "A\t%s\n" : "%s needs update\n"); | |
4bd4e730 | 1161 | unmerged_fmt = (in_porcelain ? "U\t%s\n" : "%s: needs merge\n"); |
4aab5b46 | 1162 | for (i = 0; i < istate->cache_nr; i++) { |
405e5b2f | 1163 | struct cache_entry *ce, *new; |
ec0cc704 | 1164 | int cache_errno = 0; |
73b7eae6 | 1165 | int changed = 0; |
3d1f148c | 1166 | int filtered = 0; |
ec0cc704 | 1167 | |
4aab5b46 | 1168 | ce = istate->cache[i]; |
5fdeacb0 JS |
1169 | if (ignore_submodules && S_ISGITLINK(ce->ce_mode)) |
1170 | continue; | |
1171 | ||
429bb40a | 1172 | if (pathspec && !ce_path_match(ce, pathspec, seen)) |
3d1f148c JH |
1173 | filtered = 1; |
1174 | ||
405e5b2f | 1175 | if (ce_stage(ce)) { |
4aab5b46 JH |
1176 | while ((i < istate->cache_nr) && |
1177 | ! strcmp(istate->cache[i]->name, ce->name)) | |
405e5b2f LT |
1178 | i++; |
1179 | i--; | |
1180 | if (allow_unmerged) | |
1181 | continue; | |
3d1f148c JH |
1182 | if (!filtered) |
1183 | show_file(unmerged_fmt, ce->name, in_porcelain, | |
1184 | &first, header_msg); | |
405e5b2f LT |
1185 | has_errors = 1; |
1186 | continue; | |
1187 | } | |
1188 | ||
3d1f148c | 1189 | if (filtered) |
d616813d AJ |
1190 | continue; |
1191 | ||
73b7eae6 | 1192 | new = refresh_cache_ent(istate, ce, options, &cache_errno, &changed); |
8fd2cb40 | 1193 | if (new == ce) |
405e5b2f | 1194 | continue; |
8fd2cb40 | 1195 | if (!new) { |
73b7eae6 JK |
1196 | const char *fmt; |
1197 | ||
8fd2cb40 | 1198 | if (really && cache_errno == EINVAL) { |
405e5b2f LT |
1199 | /* If we are doing --really-refresh that |
1200 | * means the index is not valid anymore. | |
1201 | */ | |
7a51ed66 | 1202 | ce->ce_flags &= ~CE_VALID; |
078a58e8 | 1203 | ce->ce_flags |= CE_UPDATE_IN_BASE; |
e636a7b4 | 1204 | istate->cache_changed |= CE_ENTRY_CHANGED; |
405e5b2f LT |
1205 | } |
1206 | if (quiet) | |
1207 | continue; | |
73b7eae6 JK |
1208 | |
1209 | if (cache_errno == ENOENT) | |
1210 | fmt = deleted_fmt; | |
1211 | else if (ce->ce_flags & CE_INTENT_TO_ADD) | |
1212 | fmt = added_fmt; /* must be before other checks */ | |
1213 | else if (changed & TYPE_CHANGED) | |
1214 | fmt = typechange_fmt; | |
1215 | else | |
1216 | fmt = modified_fmt; | |
1217 | show_file(fmt, | |
1218 | ce->name, in_porcelain, &first, header_msg); | |
405e5b2f LT |
1219 | has_errors = 1; |
1220 | continue; | |
1221 | } | |
cf558704 LT |
1222 | |
1223 | replace_index_entry(istate, i, new); | |
405e5b2f LT |
1224 | } |
1225 | return has_errors; | |
1226 | } | |
1227 | ||
25762726 BK |
1228 | static struct cache_entry *refresh_cache_entry(struct cache_entry *ce, |
1229 | unsigned int options) | |
ec0cc704 | 1230 | { |
25762726 | 1231 | return refresh_cache_ent(&the_index, ce, options, NULL, NULL); |
ec0cc704 JH |
1232 | } |
1233 | ||
db3b313c JH |
1234 | |
1235 | /***************************************************************** | |
1236 | * Index File I/O | |
1237 | *****************************************************************/ | |
1238 | ||
9d227781 JH |
1239 | #define INDEX_FORMAT_DEFAULT 3 |
1240 | ||
3c09d684 TG |
1241 | static int index_format_config(const char *var, const char *value, void *cb) |
1242 | { | |
1243 | unsigned int *version = cb; | |
1244 | if (!strcmp(var, "index.version")) { | |
1245 | *version = git_config_int(var, value); | |
1246 | return 0; | |
1247 | } | |
1248 | return 1; | |
1249 | } | |
1250 | ||
136347d7 TG |
1251 | static unsigned int get_index_format_default(void) |
1252 | { | |
1253 | char *envversion = getenv("GIT_INDEX_VERSION"); | |
3c09d684 TG |
1254 | char *endp; |
1255 | unsigned int version = INDEX_FORMAT_DEFAULT; | |
1256 | ||
136347d7 | 1257 | if (!envversion) { |
3c09d684 TG |
1258 | git_config(index_format_config, &version); |
1259 | if (version < INDEX_FORMAT_LB || INDEX_FORMAT_UB < version) { | |
1260 | warning(_("index.version set, but the value is invalid.\n" | |
136347d7 | 1261 | "Using version %i"), INDEX_FORMAT_DEFAULT); |
3c09d684 | 1262 | return INDEX_FORMAT_DEFAULT; |
136347d7 TG |
1263 | } |
1264 | return version; | |
1265 | } | |
3c09d684 TG |
1266 | |
1267 | version = strtoul(envversion, &endp, 10); | |
1268 | if (*endp || | |
1269 | version < INDEX_FORMAT_LB || INDEX_FORMAT_UB < version) { | |
1270 | warning(_("GIT_INDEX_VERSION set, but the value is invalid.\n" | |
1271 | "Using version %i"), INDEX_FORMAT_DEFAULT); | |
1272 | version = INDEX_FORMAT_DEFAULT; | |
1273 | } | |
1274 | return version; | |
136347d7 TG |
1275 | } |
1276 | ||
db3b313c JH |
1277 | /* |
1278 | * dev/ino/uid/gid/size are also just tracked to the low 32 bits | |
1279 | * Again - this is just a (very strong in practice) heuristic that | |
1280 | * the inode hasn't changed. | |
1281 | * | |
1282 | * We save the fields in big-endian order to allow using the | |
1283 | * index file over NFS transparently. | |
1284 | */ | |
1285 | struct ondisk_cache_entry { | |
1286 | struct cache_time ctime; | |
1287 | struct cache_time mtime; | |
7800c1eb TG |
1288 | uint32_t dev; |
1289 | uint32_t ino; | |
1290 | uint32_t mode; | |
1291 | uint32_t uid; | |
1292 | uint32_t gid; | |
1293 | uint32_t size; | |
db3b313c | 1294 | unsigned char sha1[20]; |
7800c1eb | 1295 | uint16_t flags; |
db3b313c JH |
1296 | char name[FLEX_ARRAY]; /* more */ |
1297 | }; | |
1298 | ||
1299 | /* | |
1300 | * This struct is used when CE_EXTENDED bit is 1 | |
1301 | * The struct must match ondisk_cache_entry exactly from | |
1302 | * ctime till flags | |
1303 | */ | |
1304 | struct ondisk_cache_entry_extended { | |
1305 | struct cache_time ctime; | |
1306 | struct cache_time mtime; | |
7800c1eb TG |
1307 | uint32_t dev; |
1308 | uint32_t ino; | |
1309 | uint32_t mode; | |
1310 | uint32_t uid; | |
1311 | uint32_t gid; | |
1312 | uint32_t size; | |
db3b313c | 1313 | unsigned char sha1[20]; |
7800c1eb TG |
1314 | uint16_t flags; |
1315 | uint16_t flags2; | |
db3b313c JH |
1316 | char name[FLEX_ARRAY]; /* more */ |
1317 | }; | |
1318 | ||
6c9cd161 | 1319 | /* These are only used for v3 or lower */ |
db3b313c JH |
1320 | #define align_flex_name(STRUCT,len) ((offsetof(struct STRUCT,name) + (len) + 8) & ~7) |
1321 | #define ondisk_cache_entry_size(len) align_flex_name(ondisk_cache_entry,len) | |
1322 | #define ondisk_cache_entry_extended_size(len) align_flex_name(ondisk_cache_entry_extended,len) | |
1323 | #define ondisk_ce_size(ce) (((ce)->ce_flags & CE_EXTENDED) ? \ | |
1324 | ondisk_cache_entry_extended_size(ce_namelen(ce)) : \ | |
1325 | ondisk_cache_entry_size(ce_namelen(ce))) | |
1326 | ||
bad68ec9 | 1327 | static int verify_hdr(struct cache_header *hdr, unsigned long size) |
e83c5163 | 1328 | { |
9126f009 | 1329 | git_SHA_CTX c; |
bad68ec9 | 1330 | unsigned char sha1[20]; |
0136bac9 | 1331 | int hdr_version; |
e83c5163 | 1332 | |
ccc4feb5 | 1333 | if (hdr->hdr_signature != htonl(CACHE_SIGNATURE)) |
e83c5163 | 1334 | return error("bad signature"); |
0136bac9 | 1335 | hdr_version = ntohl(hdr->hdr_version); |
b82a7b5b | 1336 | if (hdr_version < INDEX_FORMAT_LB || INDEX_FORMAT_UB < hdr_version) |
0136bac9 | 1337 | return error("bad index version %d", hdr_version); |
9126f009 NP |
1338 | git_SHA1_Init(&c); |
1339 | git_SHA1_Update(&c, hdr, size - 20); | |
1340 | git_SHA1_Final(sha1, &c); | |
a89fccd2 | 1341 | if (hashcmp(sha1, (unsigned char *)hdr + size - 20)) |
ca9be054 | 1342 | return error("bad index file sha1 signature"); |
e83c5163 LT |
1343 | return 0; |
1344 | } | |
1345 | ||
4aab5b46 JH |
1346 | static int read_index_extension(struct index_state *istate, |
1347 | const char *ext, void *data, unsigned long sz) | |
bad68ec9 JH |
1348 | { |
1349 | switch (CACHE_EXT(ext)) { | |
1350 | case CACHE_EXT_TREE: | |
4aab5b46 | 1351 | istate->cache_tree = cache_tree_read(data, sz); |
bad68ec9 | 1352 | break; |
cfc5789a JH |
1353 | case CACHE_EXT_RESOLVE_UNDO: |
1354 | istate->resolve_undo = resolve_undo_read(data, sz); | |
1355 | break; | |
5fc2fc8f NTND |
1356 | case CACHE_EXT_LINK: |
1357 | if (read_link_extension(istate, data, sz)) | |
1358 | return -1; | |
1359 | break; | |
bad68ec9 JH |
1360 | default: |
1361 | if (*ext < 'A' || 'Z' < *ext) | |
1362 | return error("index uses %.4s extension, which we do not understand", | |
1363 | ext); | |
1364 | fprintf(stderr, "ignoring %.4s extension\n", ext); | |
1365 | break; | |
1366 | } | |
1367 | return 0; | |
1368 | } | |
1369 | ||
4aab5b46 | 1370 | int read_index(struct index_state *istate) |
8fd2cb40 | 1371 | { |
4aab5b46 | 1372 | return read_index_from(istate, get_index_file()); |
8fd2cb40 JS |
1373 | } |
1374 | ||
3fc22b53 JH |
1375 | static struct cache_entry *cache_entry_from_ondisk(struct ondisk_cache_entry *ondisk, |
1376 | unsigned int flags, | |
1377 | const char *name, | |
1378 | size_t len) | |
1379 | { | |
1380 | struct cache_entry *ce = xmalloc(cache_entry_size(len)); | |
1381 | ||
c3d8da57 JK |
1382 | ce->ce_stat_data.sd_ctime.sec = get_be32(&ondisk->ctime.sec); |
1383 | ce->ce_stat_data.sd_mtime.sec = get_be32(&ondisk->mtime.sec); | |
1384 | ce->ce_stat_data.sd_ctime.nsec = get_be32(&ondisk->ctime.nsec); | |
1385 | ce->ce_stat_data.sd_mtime.nsec = get_be32(&ondisk->mtime.nsec); | |
1386 | ce->ce_stat_data.sd_dev = get_be32(&ondisk->dev); | |
1387 | ce->ce_stat_data.sd_ino = get_be32(&ondisk->ino); | |
1388 | ce->ce_mode = get_be32(&ondisk->mode); | |
1389 | ce->ce_stat_data.sd_uid = get_be32(&ondisk->uid); | |
1390 | ce->ce_stat_data.sd_gid = get_be32(&ondisk->gid); | |
1391 | ce->ce_stat_data.sd_size = get_be32(&ondisk->size); | |
b60e188c TG |
1392 | ce->ce_flags = flags & ~CE_NAMEMASK; |
1393 | ce->ce_namelen = len; | |
5fc2fc8f | 1394 | ce->index = 0; |
3fc22b53 JH |
1395 | hashcpy(ce->sha1, ondisk->sha1); |
1396 | memcpy(ce->name, name, len); | |
1397 | ce->name[len] = '\0'; | |
1398 | return ce; | |
1399 | } | |
1400 | ||
6c9cd161 JH |
1401 | /* |
1402 | * Adjacent cache entries tend to share the leading paths, so it makes | |
1403 | * sense to only store the differences in later entries. In the v4 | |
1404 | * on-disk format of the index, each on-disk cache entry stores the | |
1405 | * number of bytes to be stripped from the end of the previous name, | |
1406 | * and the bytes to append to the result, to come up with its name. | |
1407 | */ | |
1408 | static unsigned long expand_name_field(struct strbuf *name, const char *cp_) | |
1409 | { | |
1410 | const unsigned char *ep, *cp = (const unsigned char *)cp_; | |
1411 | size_t len = decode_varint(&cp); | |
1412 | ||
1413 | if (name->len < len) | |
1414 | die("malformed name field in the index"); | |
1415 | strbuf_remove(name, name->len - len, len); | |
1416 | for (ep = cp; *ep; ep++) | |
1417 | ; /* find the end */ | |
1418 | strbuf_add(name, cp, ep - cp); | |
1419 | return (const char *)ep + 1 - cp_; | |
1420 | } | |
1421 | ||
936f53d0 | 1422 | static struct cache_entry *create_from_disk(struct ondisk_cache_entry *ondisk, |
6c9cd161 JH |
1423 | unsigned long *ent_size, |
1424 | struct strbuf *previous_name) | |
7a51ed66 | 1425 | { |
debed2a6 | 1426 | struct cache_entry *ce; |
7fec10b7 | 1427 | size_t len; |
06aaaa0b | 1428 | const char *name; |
debed2a6 | 1429 | unsigned int flags; |
7fec10b7 | 1430 | |
7a51ed66 | 1431 | /* On-disk flags are just 16 bits */ |
c3d8da57 | 1432 | flags = get_be16(&ondisk->flags); |
debed2a6 | 1433 | len = flags & CE_NAMEMASK; |
7fec10b7 | 1434 | |
debed2a6 | 1435 | if (flags & CE_EXTENDED) { |
06aaaa0b NTND |
1436 | struct ondisk_cache_entry_extended *ondisk2; |
1437 | int extended_flags; | |
1438 | ondisk2 = (struct ondisk_cache_entry_extended *)ondisk; | |
c3d8da57 | 1439 | extended_flags = get_be16(&ondisk2->flags2) << 16; |
06aaaa0b NTND |
1440 | /* We do not yet understand any bit out of CE_EXTENDED_FLAGS */ |
1441 | if (extended_flags & ~CE_EXTENDED_FLAGS) | |
1442 | die("Unknown index entry format %08x", extended_flags); | |
debed2a6 | 1443 | flags |= extended_flags; |
06aaaa0b NTND |
1444 | name = ondisk2->name; |
1445 | } | |
1446 | else | |
1447 | name = ondisk->name; | |
1448 | ||
6c9cd161 JH |
1449 | if (!previous_name) { |
1450 | /* v3 and earlier */ | |
1451 | if (len == CE_NAMEMASK) | |
1452 | len = strlen(name); | |
1453 | ce = cache_entry_from_ondisk(ondisk, flags, name, len); | |
1454 | ||
1455 | *ent_size = ondisk_ce_size(ce); | |
1456 | } else { | |
1457 | unsigned long consumed; | |
1458 | consumed = expand_name_field(previous_name, name); | |
1459 | ce = cache_entry_from_ondisk(ondisk, flags, | |
1460 | previous_name->buf, | |
1461 | previous_name->len); | |
1462 | ||
1463 | *ent_size = (name - ((char *)ondisk)) + consumed; | |
1464 | } | |
debed2a6 | 1465 | return ce; |
cf558704 LT |
1466 | } |
1467 | ||
8fd2cb40 | 1468 | /* remember to discard_cache() before reading a different cache! */ |
3e52f70b | 1469 | int do_read_index(struct index_state *istate, const char *path, int must_exist) |
e83c5163 LT |
1470 | { |
1471 | int fd, i; | |
1472 | struct stat st; | |
debed2a6 | 1473 | unsigned long src_offset; |
e83c5163 | 1474 | struct cache_header *hdr; |
7a51ed66 LT |
1475 | void *mmap; |
1476 | size_t mmap_size; | |
6c9cd161 | 1477 | struct strbuf previous_name_buf = STRBUF_INIT, *previous_name; |
e83c5163 | 1478 | |
913e0e99 | 1479 | if (istate->initialized) |
4aab5b46 | 1480 | return istate->cache_nr; |
5d1a5c02 | 1481 | |
fba2f38a KB |
1482 | istate->timestamp.sec = 0; |
1483 | istate->timestamp.nsec = 0; | |
8fd2cb40 | 1484 | fd = open(path, O_RDONLY); |
5d1a5c02 | 1485 | if (fd < 0) { |
5fc2fc8f | 1486 | if (!must_exist && errno == ENOENT) |
5d1a5c02 | 1487 | return 0; |
5fc2fc8f | 1488 | die_errno("%s: index file open failed", path); |
5d1a5c02 | 1489 | } |
e83c5163 | 1490 | |
3511a377 | 1491 | if (fstat(fd, &st)) |
d824cbba | 1492 | die_errno("cannot stat the open index"); |
3511a377 | 1493 | |
7a51ed66 LT |
1494 | mmap_size = xsize_t(st.st_size); |
1495 | if (mmap_size < sizeof(struct cache_header) + 20) | |
3511a377 LFC |
1496 | die("index file smaller than expected"); |
1497 | ||
7a51ed66 | 1498 | mmap = xmmap(NULL, mmap_size, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0); |
7a51ed66 | 1499 | if (mmap == MAP_FAILED) |
0721c314 | 1500 | die_errno("unable to map index file"); |
57d84f8d | 1501 | close(fd); |
e83c5163 | 1502 | |
7a51ed66 LT |
1503 | hdr = mmap; |
1504 | if (verify_hdr(hdr, mmap_size) < 0) | |
e83c5163 LT |
1505 | goto unmap; |
1506 | ||
e93021b2 | 1507 | hashcpy(istate->sha1, (const unsigned char *)hdr + mmap_size - 20); |
9d227781 | 1508 | istate->version = ntohl(hdr->hdr_version); |
4aab5b46 JH |
1509 | istate->cache_nr = ntohl(hdr->hdr_entries); |
1510 | istate->cache_alloc = alloc_nr(istate->cache_nr); | |
c4aa3167 | 1511 | istate->cache = xcalloc(istate->cache_alloc, sizeof(*istate->cache)); |
913e0e99 | 1512 | istate->initialized = 1; |
7a51ed66 | 1513 | |
9d227781 | 1514 | if (istate->version == 4) |
6c9cd161 JH |
1515 | previous_name = &previous_name_buf; |
1516 | else | |
1517 | previous_name = NULL; | |
1518 | ||
7a51ed66 | 1519 | src_offset = sizeof(*hdr); |
4aab5b46 | 1520 | for (i = 0; i < istate->cache_nr; i++) { |
7a51ed66 | 1521 | struct ondisk_cache_entry *disk_ce; |
4aab5b46 | 1522 | struct cache_entry *ce; |
936f53d0 | 1523 | unsigned long consumed; |
4aab5b46 | 1524 | |
7a51ed66 | 1525 | disk_ce = (struct ondisk_cache_entry *)((char *)mmap + src_offset); |
6c9cd161 | 1526 | ce = create_from_disk(disk_ce, &consumed, previous_name); |
cf558704 | 1527 | set_index_entry(istate, i, ce); |
7a51ed66 | 1528 | |
936f53d0 | 1529 | src_offset += consumed; |
e83c5163 | 1530 | } |
6c9cd161 | 1531 | strbuf_release(&previous_name_buf); |
fba2f38a | 1532 | istate->timestamp.sec = st.st_mtime; |
c06ff490 | 1533 | istate->timestamp.nsec = ST_MTIME_NSEC(st); |
fba2f38a | 1534 | |
7a51ed66 | 1535 | while (src_offset <= mmap_size - 20 - 8) { |
bad68ec9 JH |
1536 | /* After an array of active_nr index entries, |
1537 | * there can be arbitrary number of extended | |
1538 | * sections, each of which is prefixed with | |
1539 | * extension name (4-byte) and section length | |
1540 | * in 4-byte network byte order. | |
1541 | */ | |
07cc8eca | 1542 | uint32_t extsize; |
7a51ed66 | 1543 | memcpy(&extsize, (char *)mmap + src_offset + 4, 4); |
bad68ec9 | 1544 | extsize = ntohl(extsize); |
4aab5b46 | 1545 | if (read_index_extension(istate, |
7a51ed66 LT |
1546 | (const char *) mmap + src_offset, |
1547 | (char *) mmap + src_offset + 8, | |
1d7f171c | 1548 | extsize) < 0) |
bad68ec9 | 1549 | goto unmap; |
7a51ed66 LT |
1550 | src_offset += 8; |
1551 | src_offset += extsize; | |
bad68ec9 | 1552 | } |
7a51ed66 | 1553 | munmap(mmap, mmap_size); |
4aab5b46 | 1554 | return istate->cache_nr; |
e83c5163 LT |
1555 | |
1556 | unmap: | |
7a51ed66 | 1557 | munmap(mmap, mmap_size); |
5d1a5c02 | 1558 | die("index file corrupt"); |
e83c5163 LT |
1559 | } |
1560 | ||
5fc2fc8f NTND |
1561 | int read_index_from(struct index_state *istate, const char *path) |
1562 | { | |
1563 | struct split_index *split_index; | |
1564 | int ret; | |
1565 | ||
1566 | /* istate->initialized covers both .git/index and .git/sharedindex.xxx */ | |
1567 | if (istate->initialized) | |
1568 | return istate->cache_nr; | |
1569 | ||
1570 | ret = do_read_index(istate, path, 0); | |
1571 | split_index = istate->split_index; | |
1572 | if (!split_index) | |
1573 | return ret; | |
1574 | ||
1575 | if (is_null_sha1(split_index->base_sha1)) | |
1576 | return ret; | |
5fc2fc8f NTND |
1577 | |
1578 | if (split_index->base) | |
1579 | discard_index(split_index->base); | |
1580 | else | |
1581 | split_index->base = xcalloc(1, sizeof(*split_index->base)); | |
1582 | ret = do_read_index(split_index->base, | |
1583 | git_path("sharedindex.%s", | |
1584 | sha1_to_hex(split_index->base_sha1)), 1); | |
1585 | if (hashcmp(split_index->base_sha1, split_index->base->sha1)) | |
1586 | die("broken index, expect %s in %s, got %s", | |
1587 | sha1_to_hex(split_index->base_sha1), | |
1588 | git_path("sharedindex.%s", | |
1589 | sha1_to_hex(split_index->base_sha1)), | |
1590 | sha1_to_hex(split_index->base->sha1)); | |
1591 | merge_base_index(istate); | |
1592 | return ret; | |
1593 | } | |
1594 | ||
fa7b3c2f JH |
1595 | int is_index_unborn(struct index_state *istate) |
1596 | { | |
debed2a6 | 1597 | return (!istate->cache_nr && !istate->timestamp.sec); |
fa7b3c2f JH |
1598 | } |
1599 | ||
4aab5b46 | 1600 | int discard_index(struct index_state *istate) |
6d297f81 | 1601 | { |
debed2a6 RS |
1602 | int i; |
1603 | ||
5fc2fc8f NTND |
1604 | for (i = 0; i < istate->cache_nr; i++) { |
1605 | if (istate->cache[i]->index && | |
1606 | istate->split_index && | |
1607 | istate->split_index->base && | |
1608 | istate->cache[i]->index <= istate->split_index->base->cache_nr && | |
1609 | istate->cache[i] == istate->split_index->base->cache[istate->cache[i]->index - 1]) | |
1610 | continue; | |
debed2a6 | 1611 | free(istate->cache[i]); |
5fc2fc8f | 1612 | } |
cfc5789a | 1613 | resolve_undo_clear_index(istate); |
4aab5b46 JH |
1614 | istate->cache_nr = 0; |
1615 | istate->cache_changed = 0; | |
fba2f38a KB |
1616 | istate->timestamp.sec = 0; |
1617 | istate->timestamp.nsec = 0; | |
2092678c | 1618 | free_name_hash(istate); |
4aab5b46 | 1619 | cache_tree_free(&(istate->cache_tree)); |
913e0e99 | 1620 | istate->initialized = 0; |
a0fc4db0 RS |
1621 | free(istate->cache); |
1622 | istate->cache = NULL; | |
1623 | istate->cache_alloc = 0; | |
5fc2fc8f | 1624 | discard_split_index(istate); |
7a51ed66 | 1625 | return 0; |
6d297f81 JS |
1626 | } |
1627 | ||
d1f128b0 | 1628 | int unmerged_index(const struct index_state *istate) |
94a5728c DB |
1629 | { |
1630 | int i; | |
1631 | for (i = 0; i < istate->cache_nr; i++) { | |
1632 | if (ce_stage(istate->cache[i])) | |
1633 | return 1; | |
1634 | } | |
1635 | return 0; | |
1636 | } | |
1637 | ||
4990aadc | 1638 | #define WRITE_BUFFER_SIZE 8192 |
bf0f910d | 1639 | static unsigned char write_buffer[WRITE_BUFFER_SIZE]; |
4990aadc LT |
1640 | static unsigned long write_buffer_len; |
1641 | ||
9126f009 | 1642 | static int ce_write_flush(git_SHA_CTX *context, int fd) |
6015c28b JH |
1643 | { |
1644 | unsigned int buffered = write_buffer_len; | |
1645 | if (buffered) { | |
9126f009 | 1646 | git_SHA1_Update(context, write_buffer, buffered); |
93822c22 | 1647 | if (write_in_full(fd, write_buffer, buffered) != buffered) |
6015c28b JH |
1648 | return -1; |
1649 | write_buffer_len = 0; | |
1650 | } | |
1651 | return 0; | |
1652 | } | |
1653 | ||
9126f009 | 1654 | static int ce_write(git_SHA_CTX *context, int fd, void *data, unsigned int len) |
4990aadc LT |
1655 | { |
1656 | while (len) { | |
1657 | unsigned int buffered = write_buffer_len; | |
1658 | unsigned int partial = WRITE_BUFFER_SIZE - buffered; | |
1659 | if (partial > len) | |
1660 | partial = len; | |
1661 | memcpy(write_buffer + buffered, data, partial); | |
1662 | buffered += partial; | |
1663 | if (buffered == WRITE_BUFFER_SIZE) { | |
6015c28b JH |
1664 | write_buffer_len = buffered; |
1665 | if (ce_write_flush(context, fd)) | |
4990aadc LT |
1666 | return -1; |
1667 | buffered = 0; | |
1668 | } | |
1669 | write_buffer_len = buffered; | |
1670 | len -= partial; | |
1d7f171c | 1671 | data = (char *) data + partial; |
a6080a0a JH |
1672 | } |
1673 | return 0; | |
4990aadc LT |
1674 | } |
1675 | ||
9126f009 | 1676 | static int write_index_ext_header(git_SHA_CTX *context, int fd, |
ac58c7b1 | 1677 | unsigned int ext, unsigned int sz) |
bad68ec9 JH |
1678 | { |
1679 | ext = htonl(ext); | |
1680 | sz = htonl(sz); | |
968a1d65 DR |
1681 | return ((ce_write(context, fd, &ext, 4) < 0) || |
1682 | (ce_write(context, fd, &sz, 4) < 0)) ? -1 : 0; | |
bad68ec9 JH |
1683 | } |
1684 | ||
e93021b2 | 1685 | static int ce_flush(git_SHA_CTX *context, int fd, unsigned char *sha1) |
4990aadc LT |
1686 | { |
1687 | unsigned int left = write_buffer_len; | |
ca9be054 | 1688 | |
4990aadc LT |
1689 | if (left) { |
1690 | write_buffer_len = 0; | |
9126f009 | 1691 | git_SHA1_Update(context, write_buffer, left); |
4990aadc | 1692 | } |
ca9be054 | 1693 | |
2c865d9a QH |
1694 | /* Flush first if not enough space for SHA1 signature */ |
1695 | if (left + 20 > WRITE_BUFFER_SIZE) { | |
93822c22 | 1696 | if (write_in_full(fd, write_buffer, left) != left) |
2c865d9a QH |
1697 | return -1; |
1698 | left = 0; | |
1699 | } | |
1700 | ||
ca9be054 | 1701 | /* Append the SHA1 signature at the end */ |
9126f009 | 1702 | git_SHA1_Final(write_buffer + left, context); |
e93021b2 | 1703 | hashcpy(sha1, write_buffer + left); |
ca9be054 | 1704 | left += 20; |
93822c22 | 1705 | return (write_in_full(fd, write_buffer, left) != left) ? -1 : 0; |
4990aadc LT |
1706 | } |
1707 | ||
407c8eb0 JH |
1708 | static void ce_smudge_racily_clean_entry(struct cache_entry *ce) |
1709 | { | |
1710 | /* | |
1711 | * The only thing we care about in this function is to smudge the | |
1712 | * falsely clean entry due to touch-update-touch race, so we leave | |
1713 | * everything else as they are. We are called for entries whose | |
c21d39d7 | 1714 | * ce_stat_data.sd_mtime match the index file mtime. |
c70115b4 JH |
1715 | * |
1716 | * Note that this actually does not do much for gitlinks, for | |
1717 | * which ce_match_stat_basic() always goes to the actual | |
1718 | * contents. The caller checks with is_racy_timestamp() which | |
1719 | * always says "no" for gitlinks, so we are not called for them ;-) | |
407c8eb0 JH |
1720 | */ |
1721 | struct stat st; | |
1722 | ||
1723 | if (lstat(ce->name, &st) < 0) | |
1724 | return; | |
1725 | if (ce_match_stat_basic(ce, &st)) | |
1726 | return; | |
1727 | if (ce_modified_check_fs(ce, &st)) { | |
4b3511b0 JH |
1728 | /* This is "racily clean"; smudge it. Note that this |
1729 | * is a tricky code. At first glance, it may appear | |
1730 | * that it can break with this sequence: | |
1731 | * | |
1732 | * $ echo xyzzy >frotz | |
1733 | * $ git-update-index --add frotz | |
1734 | * $ : >frotz | |
1735 | * $ sleep 3 | |
1736 | * $ echo filfre >nitfol | |
1737 | * $ git-update-index --add nitfol | |
1738 | * | |
b7e58b17 | 1739 | * but it does not. When the second update-index runs, |
4b3511b0 JH |
1740 | * it notices that the entry "frotz" has the same timestamp |
1741 | * as index, and if we were to smudge it by resetting its | |
1742 | * size to zero here, then the object name recorded | |
1743 | * in index is the 6-byte file but the cached stat information | |
1744 | * becomes zero --- which would then match what we would | |
a6080a0a | 1745 | * obtain from the filesystem next time we stat("frotz"). |
4b3511b0 JH |
1746 | * |
1747 | * However, the second update-index, before calling | |
1748 | * this function, notices that the cached size is 6 | |
1749 | * bytes and what is on the filesystem is an empty | |
1750 | * file, and never calls us, so the cached size information | |
1751 | * for "frotz" stays 6 which does not match the filesystem. | |
1752 | */ | |
c21d39d7 | 1753 | ce->ce_stat_data.sd_size = 0; |
407c8eb0 JH |
1754 | } |
1755 | } | |
1756 | ||
f136f7bf JH |
1757 | /* Copy miscellaneous fields but not the name */ |
1758 | static char *copy_cache_entry_to_ondisk(struct ondisk_cache_entry *ondisk, | |
1759 | struct cache_entry *ce) | |
7a51ed66 | 1760 | { |
b60e188c TG |
1761 | short flags; |
1762 | ||
c21d39d7 MH |
1763 | ondisk->ctime.sec = htonl(ce->ce_stat_data.sd_ctime.sec); |
1764 | ondisk->mtime.sec = htonl(ce->ce_stat_data.sd_mtime.sec); | |
1765 | ondisk->ctime.nsec = htonl(ce->ce_stat_data.sd_ctime.nsec); | |
1766 | ondisk->mtime.nsec = htonl(ce->ce_stat_data.sd_mtime.nsec); | |
1767 | ondisk->dev = htonl(ce->ce_stat_data.sd_dev); | |
1768 | ondisk->ino = htonl(ce->ce_stat_data.sd_ino); | |
7a51ed66 | 1769 | ondisk->mode = htonl(ce->ce_mode); |
c21d39d7 MH |
1770 | ondisk->uid = htonl(ce->ce_stat_data.sd_uid); |
1771 | ondisk->gid = htonl(ce->ce_stat_data.sd_gid); | |
1772 | ondisk->size = htonl(ce->ce_stat_data.sd_size); | |
7a51ed66 | 1773 | hashcpy(ondisk->sha1, ce->sha1); |
b60e188c | 1774 | |
ce51bf09 | 1775 | flags = ce->ce_flags & ~CE_NAMEMASK; |
b60e188c TG |
1776 | flags |= (ce_namelen(ce) >= CE_NAMEMASK ? CE_NAMEMASK : ce_namelen(ce)); |
1777 | ondisk->flags = htons(flags); | |
06aaaa0b NTND |
1778 | if (ce->ce_flags & CE_EXTENDED) { |
1779 | struct ondisk_cache_entry_extended *ondisk2; | |
1780 | ondisk2 = (struct ondisk_cache_entry_extended *)ondisk; | |
1781 | ondisk2->flags2 = htons((ce->ce_flags & CE_EXTENDED_FLAGS) >> 16); | |
f136f7bf | 1782 | return ondisk2->name; |
06aaaa0b | 1783 | } |
f136f7bf JH |
1784 | else { |
1785 | return ondisk->name; | |
1786 | } | |
1787 | } | |
1788 | ||
9d227781 JH |
1789 | static int ce_write_entry(git_SHA_CTX *c, int fd, struct cache_entry *ce, |
1790 | struct strbuf *previous_name) | |
f136f7bf | 1791 | { |
9d227781 JH |
1792 | int size; |
1793 | struct ondisk_cache_entry *ondisk; | |
b3c96fb1 | 1794 | int saved_namelen = saved_namelen; /* compiler workaround */ |
f136f7bf JH |
1795 | char *name; |
1796 | int result; | |
1797 | ||
b3c96fb1 NTND |
1798 | if (ce->ce_flags & CE_STRIP_NAME) { |
1799 | saved_namelen = ce_namelen(ce); | |
1800 | ce->ce_namelen = 0; | |
1801 | } | |
1802 | ||
9d227781 JH |
1803 | if (!previous_name) { |
1804 | size = ondisk_ce_size(ce); | |
1805 | ondisk = xcalloc(1, size); | |
1806 | name = copy_cache_entry_to_ondisk(ondisk, ce); | |
1807 | memcpy(name, ce->name, ce_namelen(ce)); | |
1808 | } else { | |
1809 | int common, to_remove, prefix_size; | |
1810 | unsigned char to_remove_vi[16]; | |
1811 | for (common = 0; | |
1812 | (ce->name[common] && | |
1813 | common < previous_name->len && | |
1814 | ce->name[common] == previous_name->buf[common]); | |
1815 | common++) | |
1816 | ; /* still matching */ | |
1817 | to_remove = previous_name->len - common; | |
1818 | prefix_size = encode_varint(to_remove, to_remove_vi); | |
1819 | ||
1820 | if (ce->ce_flags & CE_EXTENDED) | |
1821 | size = offsetof(struct ondisk_cache_entry_extended, name); | |
1822 | else | |
1823 | size = offsetof(struct ondisk_cache_entry, name); | |
1824 | size += prefix_size + (ce_namelen(ce) - common + 1); | |
1825 | ||
1826 | ondisk = xcalloc(1, size); | |
1827 | name = copy_cache_entry_to_ondisk(ondisk, ce); | |
1828 | memcpy(name, to_remove_vi, prefix_size); | |
1829 | memcpy(name + prefix_size, ce->name + common, ce_namelen(ce) - common); | |
1830 | ||
1831 | strbuf_splice(previous_name, common, to_remove, | |
1832 | ce->name + common, ce_namelen(ce) - common); | |
06aaaa0b | 1833 | } |
b3c96fb1 NTND |
1834 | if (ce->ce_flags & CE_STRIP_NAME) { |
1835 | ce->ce_namelen = saved_namelen; | |
1836 | ce->ce_flags &= ~CE_STRIP_NAME; | |
1837 | } | |
7a51ed66 | 1838 | |
59efba64 JN |
1839 | result = ce_write(c, fd, ondisk, size); |
1840 | free(ondisk); | |
1841 | return result; | |
7a51ed66 LT |
1842 | } |
1843 | ||
426ddeea YM |
1844 | /* |
1845 | * This function verifies if index_state has the correct sha1 of the | |
1846 | * index file. Don't die if we have any other failure, just return 0. | |
1847 | */ | |
1848 | static int verify_index_from(const struct index_state *istate, const char *path) | |
1849 | { | |
1850 | int fd; | |
1851 | ssize_t n; | |
1852 | struct stat st; | |
1853 | unsigned char sha1[20]; | |
1854 | ||
1855 | if (!istate->initialized) | |
1856 | return 0; | |
1857 | ||
1858 | fd = open(path, O_RDONLY); | |
1859 | if (fd < 0) | |
1860 | return 0; | |
1861 | ||
1862 | if (fstat(fd, &st)) | |
1863 | goto out; | |
1864 | ||
1865 | if (st.st_size < sizeof(struct cache_header) + 20) | |
1866 | goto out; | |
1867 | ||
1868 | n = pread_in_full(fd, sha1, 20, st.st_size - 20); | |
1869 | if (n != 20) | |
1870 | goto out; | |
1871 | ||
1872 | if (hashcmp(istate->sha1, sha1)) | |
1873 | goto out; | |
1874 | ||
1875 | close(fd); | |
1876 | return 1; | |
1877 | ||
1878 | out: | |
1879 | close(fd); | |
1880 | return 0; | |
1881 | } | |
1882 | ||
1883 | static int verify_index(const struct index_state *istate) | |
1884 | { | |
1885 | return verify_index_from(istate, get_index_file()); | |
1886 | } | |
1887 | ||
483fbe2b JH |
1888 | static int has_racy_timestamp(struct index_state *istate) |
1889 | { | |
1890 | int entries = istate->cache_nr; | |
1891 | int i; | |
1892 | ||
1893 | for (i = 0; i < entries; i++) { | |
1894 | struct cache_entry *ce = istate->cache[i]; | |
1895 | if (is_racy_timestamp(istate, ce)) | |
1896 | return 1; | |
1897 | } | |
1898 | return 0; | |
1899 | } | |
1900 | ||
ccdc4ec3 | 1901 | /* |
98e023de | 1902 | * Opportunistically update the index but do not complain if we can't |
ccdc4ec3 JH |
1903 | */ |
1904 | void update_index_if_able(struct index_state *istate, struct lock_file *lockfile) | |
1905 | { | |
483fbe2b | 1906 | if ((istate->cache_changed || has_racy_timestamp(istate)) && |
788cef81 | 1907 | verify_index(istate) && |
03b86647 | 1908 | write_locked_index(istate, lockfile, COMMIT_LOCK)) |
ccdc4ec3 JH |
1909 | rollback_lock_file(lockfile); |
1910 | } | |
1911 | ||
c18b80a0 NTND |
1912 | static int do_write_index(struct index_state *istate, int newfd, |
1913 | int strip_extensions) | |
197ee8c9 | 1914 | { |
9126f009 | 1915 | git_SHA_CTX c; |
197ee8c9 | 1916 | struct cache_header hdr; |
9d227781 | 1917 | int i, err, removed, extended, hdr_version; |
4aab5b46 JH |
1918 | struct cache_entry **cache = istate->cache; |
1919 | int entries = istate->cache_nr; | |
e1afca4f | 1920 | struct stat st; |
9d227781 | 1921 | struct strbuf previous_name_buf = STRBUF_INIT, *previous_name; |
025a0709 | 1922 | |
06aaaa0b | 1923 | for (i = removed = extended = 0; i < entries; i++) { |
7a51ed66 | 1924 | if (cache[i]->ce_flags & CE_REMOVE) |
025a0709 | 1925 | removed++; |
197ee8c9 | 1926 | |
06aaaa0b NTND |
1927 | /* reduce extended entries if possible */ |
1928 | cache[i]->ce_flags &= ~CE_EXTENDED; | |
1929 | if (cache[i]->ce_flags & CE_EXTENDED_FLAGS) { | |
1930 | extended++; | |
1931 | cache[i]->ce_flags |= CE_EXTENDED; | |
1932 | } | |
1933 | } | |
1934 | ||
d6e3c181 | 1935 | if (!istate->version) { |
136347d7 | 1936 | istate->version = get_index_format_default(); |
d6e3c181 NTND |
1937 | if (getenv("GIT_TEST_SPLIT_INDEX")) |
1938 | init_split_index(istate); | |
1939 | } | |
9d227781 JH |
1940 | |
1941 | /* demote version 3 to version 2 when the latter suffices */ | |
1942 | if (istate->version == 3 || istate->version == 2) | |
1943 | istate->version = extended ? 3 : 2; | |
1944 | ||
1945 | hdr_version = istate->version; | |
1946 | ||
ccc4feb5 | 1947 | hdr.hdr_signature = htonl(CACHE_SIGNATURE); |
9d227781 | 1948 | hdr.hdr_version = htonl(hdr_version); |
025a0709 | 1949 | hdr.hdr_entries = htonl(entries - removed); |
197ee8c9 | 1950 | |
9126f009 | 1951 | git_SHA1_Init(&c); |
ca9be054 | 1952 | if (ce_write(&c, newfd, &hdr, sizeof(hdr)) < 0) |
197ee8c9 LT |
1953 | return -1; |
1954 | ||
9d227781 | 1955 | previous_name = (hdr_version == 4) ? &previous_name_buf : NULL; |
197ee8c9 LT |
1956 | for (i = 0; i < entries; i++) { |
1957 | struct cache_entry *ce = cache[i]; | |
7a51ed66 | 1958 | if (ce->ce_flags & CE_REMOVE) |
aa16021e | 1959 | continue; |
e06c43c7 | 1960 | if (!ce_uptodate(ce) && is_racy_timestamp(istate, ce)) |
407c8eb0 | 1961 | ce_smudge_racily_clean_entry(ce); |
83bd7437 JK |
1962 | if (is_null_sha1(ce->sha1)) { |
1963 | static const char msg[] = "cache entry has null sha1: %s"; | |
1964 | static int allow = -1; | |
1965 | ||
1966 | if (allow < 0) | |
1967 | allow = git_env_bool("GIT_ALLOW_NULL_SHA1", 0); | |
1968 | if (allow) | |
1969 | warning(msg, ce->name); | |
1970 | else | |
1971 | return error(msg, ce->name); | |
1972 | } | |
9d227781 | 1973 | if (ce_write_entry(&c, newfd, ce, previous_name) < 0) |
197ee8c9 LT |
1974 | return -1; |
1975 | } | |
9d227781 | 1976 | strbuf_release(&previous_name_buf); |
1af1c2b6 | 1977 | |
bad68ec9 | 1978 | /* Write extension data here */ |
c18b80a0 | 1979 | if (!strip_extensions && istate->split_index) { |
5fc2fc8f NTND |
1980 | struct strbuf sb = STRBUF_INIT; |
1981 | ||
1982 | err = write_link_extension(&sb, istate) < 0 || | |
1983 | write_index_ext_header(&c, newfd, CACHE_EXT_LINK, | |
1984 | sb.len) < 0 || | |
1985 | ce_write(&c, newfd, sb.buf, sb.len) < 0; | |
1986 | strbuf_release(&sb); | |
1987 | if (err) | |
1988 | return -1; | |
1989 | } | |
c18b80a0 | 1990 | if (!strip_extensions && istate->cache_tree) { |
f285a2d7 | 1991 | struct strbuf sb = STRBUF_INIT; |
1dffb8fa | 1992 | |
1dffb8fa PH |
1993 | cache_tree_write(&sb, istate->cache_tree); |
1994 | err = write_index_ext_header(&c, newfd, CACHE_EXT_TREE, sb.len) < 0 | |
1995 | || ce_write(&c, newfd, sb.buf, sb.len) < 0; | |
1996 | strbuf_release(&sb); | |
1997 | if (err) | |
bad68ec9 | 1998 | return -1; |
bad68ec9 | 1999 | } |
c18b80a0 | 2000 | if (!strip_extensions && istate->resolve_undo) { |
cfc5789a JH |
2001 | struct strbuf sb = STRBUF_INIT; |
2002 | ||
2003 | resolve_undo_write(&sb, istate->resolve_undo); | |
2004 | err = write_index_ext_header(&c, newfd, CACHE_EXT_RESOLVE_UNDO, | |
2005 | sb.len) < 0 | |
2006 | || ce_write(&c, newfd, sb.buf, sb.len) < 0; | |
2007 | strbuf_release(&sb); | |
2008 | if (err) | |
2009 | return -1; | |
2010 | } | |
e1afca4f | 2011 | |
e93021b2 | 2012 | if (ce_flush(&c, newfd, istate->sha1) || fstat(newfd, &st)) |
e1afca4f | 2013 | return -1; |
5bcf109c KB |
2014 | istate->timestamp.sec = (unsigned int)st.st_mtime; |
2015 | istate->timestamp.nsec = ST_MTIME_NSEC(st); | |
e1afca4f | 2016 | return 0; |
197ee8c9 | 2017 | } |
e46bbcf6 | 2018 | |
626f35c8 NTND |
2019 | void set_alternate_index_output(const char *name) |
2020 | { | |
2021 | alternate_index_output = name; | |
2022 | } | |
2023 | ||
2024 | static int commit_locked_index(struct lock_file *lk) | |
2025 | { | |
2026 | if (alternate_index_output) { | |
2027 | if (lk->fd >= 0 && close_lock_file(lk)) | |
2028 | return -1; | |
2029 | if (rename(lk->filename, alternate_index_output)) | |
2030 | return -1; | |
2031 | lk->filename[0] = 0; | |
2032 | return 0; | |
2033 | } else { | |
2034 | return commit_lock_file(lk); | |
2035 | } | |
2036 | } | |
2037 | ||
03b86647 NTND |
2038 | static int do_write_locked_index(struct index_state *istate, struct lock_file *lock, |
2039 | unsigned flags) | |
2040 | { | |
c18b80a0 | 2041 | int ret = do_write_index(istate, lock->fd, 0); |
03b86647 NTND |
2042 | if (ret) |
2043 | return ret; | |
2044 | assert((flags & (COMMIT_LOCK | CLOSE_LOCK)) != | |
2045 | (COMMIT_LOCK | CLOSE_LOCK)); | |
2046 | if (flags & COMMIT_LOCK) | |
2047 | return commit_locked_index(lock); | |
2048 | else if (flags & CLOSE_LOCK) | |
2049 | return close_lock_file(lock); | |
2050 | else | |
2051 | return ret; | |
2052 | } | |
2053 | ||
5fc2fc8f NTND |
2054 | static int write_split_index(struct index_state *istate, |
2055 | struct lock_file *lock, | |
2056 | unsigned flags) | |
2057 | { | |
2058 | int ret; | |
2059 | prepare_to_write_split_index(istate); | |
2060 | ret = do_write_locked_index(istate, lock, flags); | |
2061 | finish_writing_split_index(istate); | |
2062 | return ret; | |
2063 | } | |
2064 | ||
c18b80a0 NTND |
2065 | static char *temporary_sharedindex; |
2066 | ||
2067 | static void remove_temporary_sharedindex(void) | |
2068 | { | |
2069 | if (temporary_sharedindex) { | |
2070 | unlink_or_warn(temporary_sharedindex); | |
2071 | free(temporary_sharedindex); | |
2072 | temporary_sharedindex = NULL; | |
2073 | } | |
2074 | } | |
2075 | ||
2076 | static void remove_temporary_sharedindex_on_signal(int signo) | |
2077 | { | |
2078 | remove_temporary_sharedindex(); | |
2079 | sigchain_pop(signo); | |
2080 | raise(signo); | |
2081 | } | |
2082 | ||
a0a96756 NTND |
2083 | static int write_shared_index(struct index_state *istate, |
2084 | struct lock_file *lock, unsigned flags) | |
c18b80a0 NTND |
2085 | { |
2086 | struct split_index *si = istate->split_index; | |
2087 | static int installed_handler; | |
2088 | int fd, ret; | |
2089 | ||
2090 | temporary_sharedindex = git_pathdup("sharedindex_XXXXXX"); | |
a0a96756 NTND |
2091 | fd = mkstemp(temporary_sharedindex); |
2092 | if (fd < 0) { | |
2093 | free(temporary_sharedindex); | |
2094 | temporary_sharedindex = NULL; | |
2095 | hashclr(si->base_sha1); | |
2096 | return do_write_locked_index(istate, lock, flags); | |
2097 | } | |
c18b80a0 NTND |
2098 | if (!installed_handler) { |
2099 | atexit(remove_temporary_sharedindex); | |
2100 | sigchain_push_common(remove_temporary_sharedindex_on_signal); | |
2101 | } | |
2102 | move_cache_to_base_index(istate); | |
2103 | ret = do_write_index(si->base, fd, 1); | |
2104 | close(fd); | |
2105 | if (ret) { | |
2106 | remove_temporary_sharedindex(); | |
2107 | return ret; | |
2108 | } | |
2109 | ret = rename(temporary_sharedindex, | |
2110 | git_path("sharedindex.%s", sha1_to_hex(si->base->sha1))); | |
2111 | free(temporary_sharedindex); | |
2112 | temporary_sharedindex = NULL; | |
2113 | if (!ret) | |
2114 | hashcpy(si->base_sha1, si->base->sha1); | |
2115 | return ret; | |
2116 | } | |
2117 | ||
03b86647 NTND |
2118 | int write_locked_index(struct index_state *istate, struct lock_file *lock, |
2119 | unsigned flags) | |
2120 | { | |
5fc2fc8f NTND |
2121 | struct split_index *si = istate->split_index; |
2122 | ||
5165dd59 NTND |
2123 | if (!si || alternate_index_output || |
2124 | (istate->cache_changed & ~EXTMASK)) { | |
5fc2fc8f NTND |
2125 | if (si) |
2126 | hashclr(si->base_sha1); | |
2127 | return do_write_locked_index(istate, lock, flags); | |
2128 | } | |
2129 | ||
d6e3c181 NTND |
2130 | if (getenv("GIT_TEST_SPLIT_INDEX")) { |
2131 | int v = si->base_sha1[0]; | |
2132 | if ((v & 15) < 6) | |
2133 | istate->cache_changed |= SPLIT_INDEX_ORDERED; | |
2134 | } | |
c18b80a0 | 2135 | if (istate->cache_changed & SPLIT_INDEX_ORDERED) { |
a0a96756 | 2136 | int ret = write_shared_index(istate, lock, flags); |
c18b80a0 NTND |
2137 | if (ret) |
2138 | return ret; | |
2139 | } | |
2140 | ||
5fc2fc8f | 2141 | return write_split_index(istate, lock, flags); |
03b86647 NTND |
2142 | } |
2143 | ||
e46bbcf6 MV |
2144 | /* |
2145 | * Read the index file that is potentially unmerged into given | |
63e8dc5b | 2146 | * index_state, dropping any unmerged entries. Returns true if |
e46bbcf6 MV |
2147 | * the index is unmerged. Callers who want to refuse to work |
2148 | * from an unmerged state can call this and check its return value, | |
2149 | * instead of calling read_cache(). | |
2150 | */ | |
2151 | int read_index_unmerged(struct index_state *istate) | |
2152 | { | |
2153 | int i; | |
d1a43f2a | 2154 | int unmerged = 0; |
e46bbcf6 MV |
2155 | |
2156 | read_index(istate); | |
e46bbcf6 MV |
2157 | for (i = 0; i < istate->cache_nr; i++) { |
2158 | struct cache_entry *ce = istate->cache[i]; | |
d1a43f2a JH |
2159 | struct cache_entry *new_ce; |
2160 | int size, len; | |
2161 | ||
2162 | if (!ce_stage(ce)) | |
e46bbcf6 | 2163 | continue; |
d1a43f2a | 2164 | unmerged = 1; |
68c4f6a5 | 2165 | len = ce_namelen(ce); |
d1a43f2a JH |
2166 | size = cache_entry_size(len); |
2167 | new_ce = xcalloc(1, size); | |
d1a43f2a | 2168 | memcpy(new_ce->name, ce->name, len); |
b60e188c TG |
2169 | new_ce->ce_flags = create_ce_flags(0) | CE_CONFLICTED; |
2170 | new_ce->ce_namelen = len; | |
d1a43f2a JH |
2171 | new_ce->ce_mode = ce->ce_mode; |
2172 | if (add_index_entry(istate, new_ce, 0)) | |
2173 | return error("%s: cannot drop to stage #0", | |
5699d17e | 2174 | new_ce->name); |
d1a43f2a | 2175 | i = index_name_pos(istate, new_ce->name, len); |
e46bbcf6 | 2176 | } |
d1a43f2a | 2177 | return unmerged; |
e46bbcf6 | 2178 | } |
041aee31 | 2179 | |
98fa4738 JK |
2180 | /* |
2181 | * Returns 1 if the path is an "other" path with respect to | |
2182 | * the index; that is, the path is not mentioned in the index at all, | |
2183 | * either as a file, a directory with some files in the index, | |
2184 | * or as an unmerged entry. | |
2185 | * | |
2186 | * We helpfully remove a trailing "/" from directories so that | |
2187 | * the output of read_directory can be used as-is. | |
2188 | */ | |
2189 | int index_name_is_other(const struct index_state *istate, const char *name, | |
2190 | int namelen) | |
2191 | { | |
2192 | int pos; | |
2193 | if (namelen && name[namelen - 1] == '/') | |
2194 | namelen--; | |
2195 | pos = index_name_pos(istate, name, namelen); | |
2196 | if (0 <= pos) | |
2197 | return 0; /* exact match */ | |
2198 | pos = -pos - 1; | |
2199 | if (pos < istate->cache_nr) { | |
2200 | struct cache_entry *ce = istate->cache[pos]; | |
2201 | if (ce_namelen(ce) == namelen && | |
2202 | !memcmp(ce->name, name, namelen)) | |
2203 | return 0; /* Yup, this one exists unmerged */ | |
2204 | } | |
2205 | return 1; | |
2206 | } | |
29fb37b2 | 2207 | |
ff366825 | 2208 | void *read_blob_data_from_index(struct index_state *istate, const char *path, unsigned long *size) |
29fb37b2 LF |
2209 | { |
2210 | int pos, len; | |
2211 | unsigned long sz; | |
2212 | enum object_type type; | |
2213 | void *data; | |
2214 | ||
2215 | len = strlen(path); | |
2216 | pos = index_name_pos(istate, path, len); | |
2217 | if (pos < 0) { | |
2218 | /* | |
2219 | * We might be in the middle of a merge, in which | |
2220 | * case we would read stage #2 (ours). | |
2221 | */ | |
2222 | int i; | |
2223 | for (i = -pos - 1; | |
2224 | (pos < 0 && i < istate->cache_nr && | |
2225 | !strcmp(istate->cache[i]->name, path)); | |
2226 | i++) | |
2227 | if (ce_stage(istate->cache[i]) == 2) | |
2228 | pos = i; | |
2229 | } | |
2230 | if (pos < 0) | |
2231 | return NULL; | |
2232 | data = read_sha1_file(istate->cache[pos]->sha1, &type, &sz); | |
2233 | if (!data || type != OBJ_BLOB) { | |
2234 | free(data); | |
2235 | return NULL; | |
2236 | } | |
ff366825 LF |
2237 | if (size) |
2238 | *size = sz; | |
29fb37b2 LF |
2239 | return data; |
2240 | } | |
38612532 MH |
2241 | |
2242 | void stat_validity_clear(struct stat_validity *sv) | |
2243 | { | |
2244 | free(sv->sd); | |
2245 | sv->sd = NULL; | |
2246 | } | |
2247 | ||
2248 | int stat_validity_check(struct stat_validity *sv, const char *path) | |
2249 | { | |
2250 | struct stat st; | |
2251 | ||
2252 | if (stat(path, &st) < 0) | |
2253 | return sv->sd == NULL; | |
2254 | if (!sv->sd) | |
2255 | return 0; | |
2256 | return S_ISREG(st.st_mode) && !match_stat_data(sv->sd, &st); | |
2257 | } | |
2258 | ||
2259 | void stat_validity_update(struct stat_validity *sv, int fd) | |
2260 | { | |
2261 | struct stat st; | |
2262 | ||
2263 | if (fstat(fd, &st) < 0 || !S_ISREG(st.st_mode)) | |
2264 | stat_validity_clear(sv); | |
2265 | else { | |
2266 | if (!sv->sd) | |
2267 | sv->sd = xcalloc(1, sizeof(struct stat_data)); | |
2268 | fill_stat_data(sv->sd, &st); | |
2269 | } | |
2270 | } |