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Commit | Line | Data |
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bc052d7f | 1 | #define NO_THE_INDEX_COMPATIBILITY_MACROS |
16da134b | 2 | #include "cache.h" |
f8a9d428 | 3 | #include "dir.h" |
16da134b JS |
4 | #include "tree.h" |
5 | #include "tree-walk.h" | |
076b0adc | 6 | #include "cache-tree.h" |
16da134b | 7 | #include "unpack-trees.h" |
96a02f8f | 8 | #include "progress.h" |
0cf73755 | 9 | #include "refs.h" |
06f33c17 | 10 | #include "attr.h" |
16da134b | 11 | |
8ccba008 JH |
12 | /* |
13 | * Error messages expected by scripts out of plumbing commands such as | |
14 | * read-tree. Non-scripted Porcelain is not required to use these messages | |
15 | * and in fact are encouraged to reword them to better suit their particular | |
16 | * situation better. See how "git checkout" replaces not_uptodate_file to | |
17 | * explain why it does not allow switching between branches when you have | |
18 | * local changes, for example. | |
19 | */ | |
20 | static struct unpack_trees_error_msgs unpack_plumbing_errors = { | |
21 | /* would_overwrite */ | |
22 | "Entry '%s' would be overwritten by merge. Cannot merge.", | |
23 | ||
24 | /* not_uptodate_file */ | |
25 | "Entry '%s' not uptodate. Cannot merge.", | |
26 | ||
27 | /* not_uptodate_dir */ | |
28 | "Updating '%s' would lose untracked files in it", | |
29 | ||
30 | /* would_lose_untracked */ | |
31 | "Untracked working tree file '%s' would be %s by merge.", | |
32 | ||
33 | /* bind_overlap */ | |
34 | "Entry '%s' overlaps with '%s'. Cannot bind.", | |
e800ec9d NTND |
35 | |
36 | /* sparse_not_uptodate_file */ | |
37 | "Entry '%s' not uptodate. Cannot update sparse checkout.", | |
38 | ||
39 | /* would_lose_orphaned */ | |
40 | "Working tree file '%s' would be %s by sparse checkout update.", | |
8ccba008 JH |
41 | }; |
42 | ||
43 | #define ERRORMSG(o,fld) \ | |
44 | ( ((o) && (o)->msgs.fld) \ | |
45 | ? ((o)->msgs.fld) \ | |
46 | : (unpack_plumbing_errors.fld) ) | |
47 | ||
34110cd4 LT |
48 | static void add_entry(struct unpack_trees_options *o, struct cache_entry *ce, |
49 | unsigned int set, unsigned int clear) | |
b48d5a05 | 50 | { |
34110cd4 LT |
51 | unsigned int size = ce_size(ce); |
52 | struct cache_entry *new = xmalloc(size); | |
53 | ||
54 | clear |= CE_HASHED | CE_UNHASHED; | |
55 | ||
56 | memcpy(new, ce, size); | |
57 | new->next = NULL; | |
58 | new->ce_flags = (new->ce_flags & ~clear) | set; | |
aab3b9a1 | 59 | add_index_entry(&o->result, new, ADD_CACHE_OK_TO_ADD|ADD_CACHE_OK_TO_REPLACE); |
b48d5a05 LT |
60 | } |
61 | ||
78478927 KB |
62 | /* |
63 | * Unlink the last component and schedule the leading directories for | |
64 | * removal, such that empty directories get removed. | |
16da134b | 65 | */ |
c40641b7 | 66 | static void unlink_entry(struct cache_entry *ce) |
16da134b | 67 | { |
57199892 | 68 | if (has_symlink_or_noent_leading_path(ce->name, ce_namelen(ce))) |
16a4c617 | 69 | return; |
80d706af PC |
70 | if (remove_or_warn(ce->ce_mode, ce->name)) |
71 | return; | |
78478927 | 72 | schedule_dir_for_removal(ce->name, ce_namelen(ce)); |
16da134b JS |
73 | } |
74 | ||
16da134b | 75 | static struct checkout state; |
c4758d3c | 76 | static int check_updates(struct unpack_trees_options *o) |
16da134b | 77 | { |
96a02f8f | 78 | unsigned cnt = 0, total = 0; |
dc6a0757 | 79 | struct progress *progress = NULL; |
34110cd4 | 80 | struct index_state *index = &o->result; |
33ecf7eb | 81 | int i; |
c4758d3c | 82 | int errs = 0; |
16da134b JS |
83 | |
84 | if (o->update && o->verbose_update) { | |
34110cd4 LT |
85 | for (total = cnt = 0; cnt < index->cache_nr; cnt++) { |
86 | struct cache_entry *ce = index->cache[cnt]; | |
e663db2f | 87 | if (ce->ce_flags & (CE_UPDATE | CE_REMOVE | CE_WT_REMOVE)) |
16da134b JS |
88 | total++; |
89 | } | |
90 | ||
dc6a0757 | 91 | progress = start_progress_delay("Checking out files", |
e8548645 | 92 | total, 50, 1); |
16da134b JS |
93 | cnt = 0; |
94 | } | |
95 | ||
66985e66 JH |
96 | if (o->update) |
97 | git_attr_set_direction(GIT_ATTR_CHECKOUT, &o->result); | |
34110cd4 LT |
98 | for (i = 0; i < index->cache_nr; i++) { |
99 | struct cache_entry *ce = index->cache[i]; | |
16da134b | 100 | |
e663db2f NTND |
101 | if (ce->ce_flags & CE_WT_REMOVE) { |
102 | display_progress(progress, ++cnt); | |
103 | if (o->update) | |
104 | unlink_entry(ce); | |
105 | continue; | |
106 | } | |
107 | ||
7a51ed66 | 108 | if (ce->ce_flags & CE_REMOVE) { |
1fa6ead4 | 109 | display_progress(progress, ++cnt); |
16da134b | 110 | if (o->update) |
c40641b7 | 111 | unlink_entry(ce); |
16da134b | 112 | } |
1fa6ead4 | 113 | } |
36419c8e | 114 | remove_marked_cache_entries(&o->result); |
78478927 | 115 | remove_scheduled_dirs(); |
1fa6ead4 LT |
116 | |
117 | for (i = 0; i < index->cache_nr; i++) { | |
118 | struct cache_entry *ce = index->cache[i]; | |
119 | ||
7a51ed66 | 120 | if (ce->ce_flags & CE_UPDATE) { |
1fa6ead4 | 121 | display_progress(progress, ++cnt); |
7a51ed66 | 122 | ce->ce_flags &= ~CE_UPDATE; |
16a4c617 | 123 | if (o->update) { |
c4758d3c | 124 | errs |= checkout_entry(ce, &state, NULL); |
16a4c617 | 125 | } |
16da134b JS |
126 | } |
127 | } | |
4d4fcc54 | 128 | stop_progress(&progress); |
66985e66 JH |
129 | if (o->update) |
130 | git_attr_set_direction(GIT_ATTR_CHECKIN, NULL); | |
c4758d3c | 131 | return errs != 0; |
16da134b JS |
132 | } |
133 | ||
e800ec9d NTND |
134 | static int verify_uptodate_sparse(struct cache_entry *ce, struct unpack_trees_options *o); |
135 | static int verify_absent_sparse(struct cache_entry *ce, const char *action, struct unpack_trees_options *o); | |
136 | ||
137 | static int will_have_skip_worktree(const struct cache_entry *ce, struct unpack_trees_options *o) | |
138 | { | |
139 | const char *basename; | |
140 | ||
141 | if (ce_stage(ce)) | |
142 | return 0; | |
143 | ||
144 | basename = strrchr(ce->name, '/'); | |
145 | basename = basename ? basename+1 : ce->name; | |
146 | return excluded_from_list(ce->name, ce_namelen(ce), basename, NULL, o->el) <= 0; | |
147 | } | |
148 | ||
149 | static int apply_sparse_checkout(struct cache_entry *ce, struct unpack_trees_options *o) | |
150 | { | |
151 | int was_skip_worktree = ce_skip_worktree(ce); | |
152 | ||
153 | if (will_have_skip_worktree(ce, o)) | |
154 | ce->ce_flags |= CE_SKIP_WORKTREE; | |
155 | else | |
156 | ce->ce_flags &= ~CE_SKIP_WORKTREE; | |
157 | ||
158 | /* | |
159 | * We only care about files getting into the checkout area | |
160 | * If merge strategies want to remove some, go ahead, this | |
161 | * flag will be removed eventually in unpack_trees() if it's | |
162 | * outside checkout area. | |
163 | */ | |
164 | if (ce->ce_flags & CE_REMOVE) | |
165 | return 0; | |
166 | ||
167 | if (!was_skip_worktree && ce_skip_worktree(ce)) { | |
168 | /* | |
169 | * If CE_UPDATE is set, verify_uptodate() must be called already | |
170 | * also stat info may have lost after merged_entry() so calling | |
171 | * verify_uptodate() again may fail | |
172 | */ | |
173 | if (!(ce->ce_flags & CE_UPDATE) && verify_uptodate_sparse(ce, o)) | |
174 | return -1; | |
175 | ce->ce_flags |= CE_WT_REMOVE; | |
176 | } | |
177 | if (was_skip_worktree && !ce_skip_worktree(ce)) { | |
178 | if (verify_absent_sparse(ce, "overwritten", o)) | |
179 | return -1; | |
180 | ce->ce_flags |= CE_UPDATE; | |
181 | } | |
182 | return 0; | |
183 | } | |
184 | ||
34110cd4 | 185 | static inline int call_unpack_fn(struct cache_entry **src, struct unpack_trees_options *o) |
01904572 | 186 | { |
34110cd4 LT |
187 | int ret = o->fn(src, o); |
188 | if (ret > 0) | |
01904572 | 189 | ret = 0; |
01904572 LT |
190 | return ret; |
191 | } | |
192 | ||
da165f47 JH |
193 | static void mark_ce_used(struct cache_entry *ce, struct unpack_trees_options *o) |
194 | { | |
195 | ce->ce_flags |= CE_UNPACKED; | |
196 | ||
197 | if (o->cache_bottom < o->src_index->cache_nr && | |
198 | o->src_index->cache[o->cache_bottom] == ce) { | |
199 | int bottom = o->cache_bottom; | |
200 | while (bottom < o->src_index->cache_nr && | |
201 | o->src_index->cache[bottom]->ce_flags & CE_UNPACKED) | |
202 | bottom++; | |
203 | o->cache_bottom = bottom; | |
204 | } | |
205 | } | |
206 | ||
207 | static void mark_all_ce_unused(struct index_state *index) | |
208 | { | |
209 | int i; | |
210 | for (i = 0; i < index->cache_nr; i++) | |
211 | index->cache[i]->ce_flags &= ~CE_UNPACKED; | |
212 | } | |
213 | ||
214 | static int locate_in_src_index(struct cache_entry *ce, | |
215 | struct unpack_trees_options *o) | |
216 | { | |
217 | struct index_state *index = o->src_index; | |
218 | int len = ce_namelen(ce); | |
219 | int pos = index_name_pos(index, ce->name, len); | |
220 | if (pos < 0) | |
221 | pos = -1 - pos; | |
222 | return pos; | |
223 | } | |
224 | ||
225 | /* | |
226 | * We call unpack_index_entry() with an unmerged cache entry | |
227 | * only in diff-index, and it wants a single callback. Skip | |
228 | * the other unmerged entry with the same name. | |
229 | */ | |
230 | static void mark_ce_used_same_name(struct cache_entry *ce, | |
231 | struct unpack_trees_options *o) | |
232 | { | |
233 | struct index_state *index = o->src_index; | |
234 | int len = ce_namelen(ce); | |
235 | int pos; | |
236 | ||
237 | for (pos = locate_in_src_index(ce, o); pos < index->cache_nr; pos++) { | |
238 | struct cache_entry *next = index->cache[pos]; | |
239 | if (len != ce_namelen(next) || | |
240 | memcmp(ce->name, next->name, len)) | |
241 | break; | |
242 | mark_ce_used(next, o); | |
243 | } | |
244 | } | |
245 | ||
246 | static struct cache_entry *next_cache_entry(struct unpack_trees_options *o) | |
247 | { | |
248 | const struct index_state *index = o->src_index; | |
249 | int pos = o->cache_bottom; | |
250 | ||
251 | while (pos < index->cache_nr) { | |
252 | struct cache_entry *ce = index->cache[pos]; | |
253 | if (!(ce->ce_flags & CE_UNPACKED)) | |
254 | return ce; | |
255 | pos++; | |
256 | } | |
257 | return NULL; | |
258 | } | |
259 | ||
260 | static void add_same_unmerged(struct cache_entry *ce, | |
261 | struct unpack_trees_options *o) | |
262 | { | |
263 | struct index_state *index = o->src_index; | |
264 | int len = ce_namelen(ce); | |
265 | int pos = index_name_pos(index, ce->name, len); | |
266 | ||
267 | if (0 <= pos) | |
268 | die("programming error in a caller of mark_ce_used_same_name"); | |
269 | for (pos = -pos - 1; pos < index->cache_nr; pos++) { | |
270 | struct cache_entry *next = index->cache[pos]; | |
271 | if (len != ce_namelen(next) || | |
272 | memcmp(ce->name, next->name, len)) | |
273 | break; | |
274 | add_entry(o, next, 0, 0); | |
275 | mark_ce_used(next, o); | |
276 | } | |
277 | } | |
278 | ||
279 | static int unpack_index_entry(struct cache_entry *ce, | |
280 | struct unpack_trees_options *o) | |
01904572 | 281 | { |
0039ba7e | 282 | struct cache_entry *src[5] = { ce, NULL, }; |
da165f47 | 283 | int ret; |
34110cd4 | 284 | |
da165f47 | 285 | mark_ce_used(ce, o); |
01904572 LT |
286 | if (ce_stage(ce)) { |
287 | if (o->skip_unmerged) { | |
34110cd4 LT |
288 | add_entry(o, ce, 0, 0); |
289 | return 0; | |
01904572 | 290 | } |
01904572 | 291 | } |
da165f47 JH |
292 | ret = call_unpack_fn(src, o); |
293 | if (ce_stage(ce)) | |
294 | mark_ce_used_same_name(ce, o); | |
295 | return ret; | |
01904572 LT |
296 | } |
297 | ||
730f7284 JH |
298 | static int find_cache_pos(struct traverse_info *, const struct name_entry *); |
299 | ||
300 | static void restore_cache_bottom(struct traverse_info *info, int bottom) | |
301 | { | |
302 | struct unpack_trees_options *o = info->data; | |
303 | ||
304 | if (o->diff_index_cached) | |
305 | return; | |
306 | o->cache_bottom = bottom; | |
307 | } | |
308 | ||
309 | static int switch_cache_bottom(struct traverse_info *info) | |
310 | { | |
311 | struct unpack_trees_options *o = info->data; | |
312 | int ret, pos; | |
313 | ||
314 | if (o->diff_index_cached) | |
315 | return 0; | |
316 | ret = o->cache_bottom; | |
317 | pos = find_cache_pos(info->prev, &info->name); | |
318 | ||
319 | if (pos < -1) | |
320 | o->cache_bottom = -2 - pos; | |
321 | else if (pos < 0) | |
322 | o->cache_bottom = o->src_index->cache_nr; | |
323 | return ret; | |
01904572 LT |
324 | } |
325 | ||
2af202be | 326 | static int traverse_trees_recursive(int n, unsigned long dirmask, unsigned long df_conflicts, struct name_entry *names, struct traverse_info *info) |
16da134b | 327 | { |
730f7284 | 328 | int i, ret, bottom; |
ca885a4f | 329 | struct tree_desc t[MAX_UNPACK_TREES]; |
01904572 LT |
330 | struct traverse_info newinfo; |
331 | struct name_entry *p; | |
332 | ||
333 | p = names; | |
334 | while (!p->mode) | |
335 | p++; | |
336 | ||
337 | newinfo = *info; | |
338 | newinfo.prev = info; | |
339 | newinfo.name = *p; | |
340 | newinfo.pathlen += tree_entry_len(p->path, p->sha1) + 1; | |
341 | newinfo.conflicts |= df_conflicts; | |
342 | ||
343 | for (i = 0; i < n; i++, dirmask >>= 1) { | |
344 | const unsigned char *sha1 = NULL; | |
345 | if (dirmask & 1) | |
346 | sha1 = names[i].sha1; | |
347 | fill_tree_descriptor(t+i, sha1); | |
348 | } | |
730f7284 JH |
349 | |
350 | bottom = switch_cache_bottom(&newinfo); | |
351 | ret = traverse_trees(n, t, &newinfo); | |
352 | restore_cache_bottom(&newinfo, bottom); | |
353 | return ret; | |
01904572 LT |
354 | } |
355 | ||
356 | /* | |
357 | * Compare the traverse-path to the cache entry without actually | |
358 | * having to generate the textual representation of the traverse | |
359 | * path. | |
360 | * | |
361 | * NOTE! This *only* compares up to the size of the traverse path | |
362 | * itself - the caller needs to do the final check for the cache | |
363 | * entry having more data at the end! | |
364 | */ | |
365 | static int do_compare_entry(const struct cache_entry *ce, const struct traverse_info *info, const struct name_entry *n) | |
366 | { | |
367 | int len, pathlen, ce_len; | |
368 | const char *ce_name; | |
369 | ||
370 | if (info->prev) { | |
371 | int cmp = do_compare_entry(ce, info->prev, &info->name); | |
372 | if (cmp) | |
373 | return cmp; | |
374 | } | |
375 | pathlen = info->pathlen; | |
376 | ce_len = ce_namelen(ce); | |
377 | ||
378 | /* If ce_len < pathlen then we must have previously hit "name == directory" entry */ | |
379 | if (ce_len < pathlen) | |
380 | return -1; | |
381 | ||
382 | ce_len -= pathlen; | |
383 | ce_name = ce->name + pathlen; | |
384 | ||
385 | len = tree_entry_len(n->path, n->sha1); | |
386 | return df_name_compare(ce_name, ce_len, S_IFREG, n->path, len, n->mode); | |
387 | } | |
388 | ||
389 | static int compare_entry(const struct cache_entry *ce, const struct traverse_info *info, const struct name_entry *n) | |
390 | { | |
391 | int cmp = do_compare_entry(ce, info, n); | |
392 | if (cmp) | |
393 | return cmp; | |
394 | ||
395 | /* | |
396 | * Even if the beginning compared identically, the ce should | |
397 | * compare as bigger than a directory leading up to it! | |
398 | */ | |
399 | return ce_namelen(ce) > traverse_path_len(info, n); | |
400 | } | |
401 | ||
da165f47 JH |
402 | static int ce_in_traverse_path(const struct cache_entry *ce, |
403 | const struct traverse_info *info) | |
404 | { | |
405 | if (!info->prev) | |
406 | return 1; | |
407 | if (do_compare_entry(ce, info->prev, &info->name)) | |
408 | return 0; | |
409 | /* | |
410 | * If ce (blob) is the same name as the path (which is a tree | |
411 | * we will be descending into), it won't be inside it. | |
412 | */ | |
413 | return (info->pathlen < ce_namelen(ce)); | |
414 | } | |
415 | ||
01904572 LT |
416 | static struct cache_entry *create_ce_entry(const struct traverse_info *info, const struct name_entry *n, int stage) |
417 | { | |
418 | int len = traverse_path_len(info, n); | |
419 | struct cache_entry *ce = xcalloc(1, cache_entry_size(len)); | |
420 | ||
421 | ce->ce_mode = create_ce_mode(n->mode); | |
422 | ce->ce_flags = create_ce_flags(len, stage); | |
423 | hashcpy(ce->sha1, n->sha1); | |
424 | make_traverse_path(ce->name, info, n); | |
425 | ||
426 | return ce; | |
427 | } | |
428 | ||
c7cddc1a RS |
429 | static int unpack_nondirectories(int n, unsigned long mask, |
430 | unsigned long dirmask, | |
431 | struct cache_entry **src, | |
432 | const struct name_entry *names, | |
433 | const struct traverse_info *info) | |
01904572 LT |
434 | { |
435 | int i; | |
436 | struct unpack_trees_options *o = info->data; | |
437 | unsigned long conflicts; | |
438 | ||
439 | /* Do we have *only* directories? Nothing to do */ | |
440 | if (mask == dirmask && !src[0]) | |
441 | return 0; | |
442 | ||
443 | conflicts = info->conflicts; | |
444 | if (o->merge) | |
445 | conflicts >>= 1; | |
446 | conflicts |= dirmask; | |
447 | ||
448 | /* | |
449 | * Ok, we've filled in up to any potential index entry in src[0], | |
450 | * now do the rest. | |
451 | */ | |
452 | for (i = 0; i < n; i++) { | |
453 | int stage; | |
454 | unsigned int bit = 1ul << i; | |
455 | if (conflicts & bit) { | |
456 | src[i + o->merge] = o->df_conflict_entry; | |
457 | continue; | |
458 | } | |
459 | if (!(mask & bit)) | |
460 | continue; | |
461 | if (!o->merge) | |
462 | stage = 0; | |
463 | else if (i + 1 < o->head_idx) | |
464 | stage = 1; | |
465 | else if (i + 1 > o->head_idx) | |
466 | stage = 3; | |
467 | else | |
468 | stage = 2; | |
469 | src[i + o->merge] = create_ce_entry(info, names + i, stage); | |
470 | } | |
471 | ||
472 | if (o->merge) | |
34110cd4 | 473 | return call_unpack_fn(src, o); |
01904572 | 474 | |
01904572 | 475 | for (i = 0; i < n; i++) |
aab3b9a1 JH |
476 | if (src[i] && src[i] != o->df_conflict_entry) |
477 | add_entry(o, src[i], 0, 0); | |
01904572 LT |
478 | return 0; |
479 | } | |
480 | ||
353c5eeb JH |
481 | static int unpack_failed(struct unpack_trees_options *o, const char *message) |
482 | { | |
483 | discard_index(&o->result); | |
484 | if (!o->gently) { | |
485 | if (message) | |
486 | return error("%s", message); | |
487 | return -1; | |
488 | } | |
489 | return -1; | |
490 | } | |
491 | ||
730f7284 JH |
492 | /* NEEDSWORK: give this a better name and share with tree-walk.c */ |
493 | static int name_compare(const char *a, int a_len, | |
494 | const char *b, int b_len) | |
495 | { | |
496 | int len = (a_len < b_len) ? a_len : b_len; | |
497 | int cmp = memcmp(a, b, len); | |
498 | if (cmp) | |
499 | return cmp; | |
500 | return (a_len - b_len); | |
501 | } | |
502 | ||
503 | /* | |
504 | * The tree traversal is looking at name p. If we have a matching entry, | |
505 | * return it. If name p is a directory in the index, do not return | |
506 | * anything, as we will want to match it when the traversal descends into | |
507 | * the directory. | |
508 | */ | |
509 | static int find_cache_pos(struct traverse_info *info, | |
510 | const struct name_entry *p) | |
511 | { | |
512 | int pos; | |
513 | struct unpack_trees_options *o = info->data; | |
514 | struct index_state *index = o->src_index; | |
515 | int pfxlen = info->pathlen; | |
516 | int p_len = tree_entry_len(p->path, p->sha1); | |
517 | ||
518 | for (pos = o->cache_bottom; pos < index->cache_nr; pos++) { | |
519 | struct cache_entry *ce = index->cache[pos]; | |
520 | const char *ce_name, *ce_slash; | |
521 | int cmp, ce_len; | |
522 | ||
523 | if (!ce_in_traverse_path(ce, info)) | |
524 | continue; | |
525 | if (ce->ce_flags & CE_UNPACKED) | |
526 | continue; | |
527 | ce_name = ce->name + pfxlen; | |
528 | ce_slash = strchr(ce_name, '/'); | |
529 | if (ce_slash) | |
530 | ce_len = ce_slash - ce_name; | |
531 | else | |
532 | ce_len = ce_namelen(ce) - pfxlen; | |
533 | cmp = name_compare(p->path, p_len, ce_name, ce_len); | |
534 | /* | |
535 | * Exact match; if we have a directory we need to | |
536 | * delay returning it. | |
537 | */ | |
538 | if (!cmp) | |
539 | return ce_slash ? -2 - pos : pos; | |
540 | if (0 < cmp) | |
541 | continue; /* keep looking */ | |
542 | /* | |
543 | * ce_name sorts after p->path; could it be that we | |
544 | * have files under p->path directory in the index? | |
545 | * E.g. ce_name == "t-i", and p->path == "t"; we may | |
546 | * have "t/a" in the index. | |
547 | */ | |
548 | if (p_len < ce_len && !memcmp(ce_name, p->path, p_len) && | |
549 | ce_name[p_len] < '/') | |
550 | continue; /* keep looking */ | |
551 | break; | |
552 | } | |
553 | return -1; | |
554 | } | |
555 | ||
556 | static struct cache_entry *find_cache_entry(struct traverse_info *info, | |
557 | const struct name_entry *p) | |
558 | { | |
559 | int pos = find_cache_pos(info, p); | |
560 | struct unpack_trees_options *o = info->data; | |
561 | ||
562 | if (0 <= pos) | |
563 | return o->src_index->cache[pos]; | |
564 | else | |
565 | return NULL; | |
566 | } | |
567 | ||
ba655da5 JH |
568 | static void debug_path(struct traverse_info *info) |
569 | { | |
570 | if (info->prev) { | |
571 | debug_path(info->prev); | |
572 | if (*info->prev->name.path) | |
573 | putchar('/'); | |
574 | } | |
575 | printf("%s", info->name.path); | |
576 | } | |
577 | ||
578 | static void debug_name_entry(int i, struct name_entry *n) | |
579 | { | |
580 | printf("ent#%d %06o %s\n", i, | |
581 | n->path ? n->mode : 0, | |
582 | n->path ? n->path : "(missing)"); | |
583 | } | |
584 | ||
585 | static void debug_unpack_callback(int n, | |
586 | unsigned long mask, | |
587 | unsigned long dirmask, | |
588 | struct name_entry *names, | |
589 | struct traverse_info *info) | |
590 | { | |
591 | int i; | |
592 | printf("* unpack mask %lu, dirmask %lu, cnt %d ", | |
593 | mask, dirmask, n); | |
594 | debug_path(info); | |
595 | putchar('\n'); | |
596 | for (i = 0; i < n; i++) | |
597 | debug_name_entry(i, names + i); | |
598 | } | |
599 | ||
01904572 LT |
600 | static int unpack_callback(int n, unsigned long mask, unsigned long dirmask, struct name_entry *names, struct traverse_info *info) |
601 | { | |
c7cddc1a | 602 | struct cache_entry *src[MAX_UNPACK_TREES + 1] = { NULL, }; |
01904572 | 603 | struct unpack_trees_options *o = info->data; |
01904572 LT |
604 | const struct name_entry *p = names; |
605 | ||
606 | /* Find first entry with a real name (we could use "mask" too) */ | |
607 | while (!p->mode) | |
608 | p++; | |
609 | ||
ba655da5 JH |
610 | if (o->debug_unpack) |
611 | debug_unpack_callback(n, mask, dirmask, names, info); | |
612 | ||
01904572 LT |
613 | /* Are we supposed to look at the index too? */ |
614 | if (o->merge) { | |
da165f47 | 615 | while (1) { |
da165f47 | 616 | int cmp; |
730f7284 JH |
617 | struct cache_entry *ce; |
618 | ||
619 | if (o->diff_index_cached) | |
620 | ce = next_cache_entry(o); | |
621 | else | |
622 | ce = find_cache_entry(info, p); | |
623 | ||
da165f47 JH |
624 | if (!ce) |
625 | break; | |
626 | cmp = compare_entry(ce, info, p); | |
01904572 LT |
627 | if (cmp < 0) { |
628 | if (unpack_index_entry(ce, o) < 0) | |
353c5eeb | 629 | return unpack_failed(o, NULL); |
01904572 LT |
630 | continue; |
631 | } | |
632 | if (!cmp) { | |
633 | if (ce_stage(ce)) { | |
634 | /* | |
da165f47 JH |
635 | * If we skip unmerged index |
636 | * entries, we'll skip this | |
637 | * entry *and* the tree | |
638 | * entries associated with it! | |
01904572 | 639 | */ |
34110cd4 | 640 | if (o->skip_unmerged) { |
da165f47 | 641 | add_same_unmerged(ce, o); |
01904572 | 642 | return mask; |
34110cd4 | 643 | } |
01904572 LT |
644 | } |
645 | src[0] = ce; | |
01904572 LT |
646 | } |
647 | break; | |
648 | } | |
649 | } | |
650 | ||
34110cd4 | 651 | if (unpack_nondirectories(n, mask, dirmask, src, names, info) < 0) |
01904572 LT |
652 | return -1; |
653 | ||
da165f47 JH |
654 | if (src[0]) { |
655 | if (ce_stage(src[0])) | |
656 | mark_ce_used_same_name(src[0], o); | |
657 | else | |
658 | mark_ce_used(src[0], o); | |
659 | } | |
660 | ||
01904572 LT |
661 | /* Now handle any directories.. */ |
662 | if (dirmask) { | |
663 | unsigned long conflicts = mask & ~dirmask; | |
664 | if (o->merge) { | |
665 | conflicts <<= 1; | |
666 | if (src[0]) | |
667 | conflicts |= 1; | |
668 | } | |
b65982b6 JH |
669 | |
670 | /* special case: "diff-index --cached" looking at a tree */ | |
671 | if (o->diff_index_cached && | |
672 | n == 1 && dirmask == 1 && S_ISDIR(names->mode)) { | |
673 | int matches; | |
674 | matches = cache_tree_matches_traversal(o->src_index->cache_tree, | |
675 | names, info); | |
676 | /* | |
da165f47 JH |
677 | * Everything under the name matches; skip the |
678 | * entire hierarchy. diff_index_cached codepath | |
679 | * special cases D/F conflicts in such a way that | |
680 | * it does not do any look-ahead, so this is safe. | |
b65982b6 JH |
681 | */ |
682 | if (matches) { | |
da165f47 | 683 | o->cache_bottom += matches; |
b65982b6 JH |
684 | return mask; |
685 | } | |
686 | } | |
687 | ||
542c264b JH |
688 | if (traverse_trees_recursive(n, dirmask, conflicts, |
689 | names, info) < 0) | |
690 | return -1; | |
01904572 LT |
691 | return mask; |
692 | } | |
693 | ||
694 | return mask; | |
695 | } | |
696 | ||
2e2b887d JH |
697 | /* |
698 | * N-way merge "len" trees. Returns 0 on success, -1 on failure to manipulate the | |
699 | * resulting index, -2 on failure to reflect the changes to the work tree. | |
700 | */ | |
01904572 LT |
701 | int unpack_trees(unsigned len, struct tree_desc *t, struct unpack_trees_options *o) |
702 | { | |
e800ec9d | 703 | int i, ret; |
0fb1eaa8 | 704 | static struct cache_entry *dfc; |
08aefc9e | 705 | struct exclude_list el; |
16da134b | 706 | |
ca885a4f JH |
707 | if (len > MAX_UNPACK_TREES) |
708 | die("unpack_trees takes at most %d trees", MAX_UNPACK_TREES); | |
076b0adc | 709 | memset(&state, 0, sizeof(state)); |
16da134b JS |
710 | state.base_dir = ""; |
711 | state.force = 1; | |
712 | state.quiet = 1; | |
713 | state.refresh_cache = 1; | |
714 | ||
08aefc9e NTND |
715 | memset(&el, 0, sizeof(el)); |
716 | if (!core_apply_sparse_checkout || !o->update) | |
717 | o->skip_sparse_checkout = 1; | |
718 | if (!o->skip_sparse_checkout) { | |
719 | if (add_excludes_from_file_to_list(git_path("info/sparse-checkout"), "", 0, NULL, &el, 0) < 0) | |
720 | o->skip_sparse_checkout = 1; | |
721 | else | |
722 | o->el = ⪙ | |
723 | } | |
724 | ||
34110cd4 | 725 | memset(&o->result, 0, sizeof(o->result)); |
913e0e99 | 726 | o->result.initialized = 1; |
da165f47 JH |
727 | o->result.timestamp.sec = o->src_index->timestamp.sec; |
728 | o->result.timestamp.nsec = o->src_index->timestamp.nsec; | |
16da134b | 729 | o->merge_size = len; |
da165f47 | 730 | mark_all_ce_unused(o->src_index); |
0fb1eaa8 JH |
731 | |
732 | if (!dfc) | |
13494ed1 | 733 | dfc = xcalloc(1, cache_entry_size(0)); |
0fb1eaa8 | 734 | o->df_conflict_entry = dfc; |
16da134b JS |
735 | |
736 | if (len) { | |
01904572 LT |
737 | const char *prefix = o->prefix ? o->prefix : ""; |
738 | struct traverse_info info; | |
739 | ||
740 | setup_traverse_info(&info, prefix); | |
741 | info.fn = unpack_callback; | |
742 | info.data = o; | |
743 | ||
da165f47 JH |
744 | if (o->prefix) { |
745 | /* | |
746 | * Unpack existing index entries that sort before the | |
747 | * prefix the tree is spliced into. Note that o->merge | |
748 | * is always true in this case. | |
749 | */ | |
750 | while (1) { | |
751 | struct cache_entry *ce = next_cache_entry(o); | |
752 | if (!ce) | |
753 | break; | |
754 | if (ce_in_traverse_path(ce, &info)) | |
755 | break; | |
756 | if (unpack_index_entry(ce, o) < 0) | |
757 | goto return_failed; | |
758 | } | |
08aefc9e | 759 | } |
da165f47 | 760 | |
01904572 | 761 | if (traverse_trees(len, t, &info) < 0) |
da165f47 | 762 | goto return_failed; |
16da134b JS |
763 | } |
764 | ||
01904572 LT |
765 | /* Any left-over entries in the index? */ |
766 | if (o->merge) { | |
da165f47 JH |
767 | while (1) { |
768 | struct cache_entry *ce = next_cache_entry(o); | |
769 | if (!ce) | |
770 | break; | |
01904572 | 771 | if (unpack_index_entry(ce, o) < 0) |
da165f47 | 772 | goto return_failed; |
17e46426 | 773 | } |
17e46426 | 774 | } |
da165f47 | 775 | mark_all_ce_unused(o->src_index); |
16da134b | 776 | |
08aefc9e NTND |
777 | if (o->trivial_merges_only && o->nontrivial_merge) { |
778 | ret = unpack_failed(o, "Merge requires file-level merging"); | |
779 | goto done; | |
780 | } | |
01904572 | 781 | |
e800ec9d | 782 | if (!o->skip_sparse_checkout) { |
9e1afb16 | 783 | int empty_worktree = 1; |
e800ec9d NTND |
784 | for (i = 0;i < o->result.cache_nr;i++) { |
785 | struct cache_entry *ce = o->result.cache[i]; | |
786 | ||
787 | if (apply_sparse_checkout(ce, o)) { | |
788 | ret = -1; | |
789 | goto done; | |
790 | } | |
f1f523ea NTND |
791 | /* |
792 | * Merge strategies may set CE_UPDATE|CE_REMOVE outside checkout | |
793 | * area as a result of ce_skip_worktree() shortcuts in | |
794 | * verify_absent() and verify_uptodate(). Clear them. | |
795 | */ | |
796 | if (ce_skip_worktree(ce)) | |
797 | ce->ce_flags &= ~(CE_UPDATE | CE_REMOVE); | |
9e1afb16 NTND |
798 | else |
799 | empty_worktree = 0; | |
f1f523ea | 800 | |
e800ec9d | 801 | } |
9e1afb16 NTND |
802 | if (o->result.cache_nr && empty_worktree) { |
803 | ret = unpack_failed(o, "Sparse checkout leaves no entry on working directory"); | |
804 | goto done; | |
805 | } | |
e800ec9d | 806 | } |
01904572 | 807 | |
34110cd4 | 808 | o->src_index = NULL; |
2e2b887d | 809 | ret = check_updates(o) ? (-2) : 0; |
34110cd4 LT |
810 | if (o->dst_index) |
811 | *o->dst_index = o->result; | |
08aefc9e NTND |
812 | |
813 | done: | |
814 | for (i = 0;i < el.nr;i++) | |
815 | free(el.excludes[i]); | |
816 | if (el.excludes) | |
817 | free(el.excludes); | |
818 | ||
2e2b887d | 819 | return ret; |
da165f47 JH |
820 | |
821 | return_failed: | |
822 | mark_all_ce_unused(o->src_index); | |
026680f8 JH |
823 | ret = unpack_failed(o, NULL); |
824 | goto done; | |
16da134b | 825 | } |
076b0adc JS |
826 | |
827 | /* Here come the merge functions */ | |
828 | ||
8ccba008 | 829 | static int reject_merge(struct cache_entry *ce, struct unpack_trees_options *o) |
076b0adc | 830 | { |
8ccba008 | 831 | return error(ERRORMSG(o, would_overwrite), ce->name); |
076b0adc JS |
832 | } |
833 | ||
834 | static int same(struct cache_entry *a, struct cache_entry *b) | |
835 | { | |
836 | if (!!a != !!b) | |
837 | return 0; | |
838 | if (!a && !b) | |
839 | return 1; | |
e11d7b59 JH |
840 | if ((a->ce_flags | b->ce_flags) & CE_CONFLICTED) |
841 | return 0; | |
076b0adc | 842 | return a->ce_mode == b->ce_mode && |
a89fccd2 | 843 | !hashcmp(a->sha1, b->sha1); |
076b0adc JS |
844 | } |
845 | ||
846 | ||
847 | /* | |
848 | * When a CE gets turned into an unmerged entry, we | |
849 | * want it to be up-to-date | |
850 | */ | |
35a5aa79 NTND |
851 | static int verify_uptodate_1(struct cache_entry *ce, |
852 | struct unpack_trees_options *o, | |
853 | const char *error_msg) | |
076b0adc JS |
854 | { |
855 | struct stat st; | |
856 | ||
52030836 | 857 | if (o->index_only || (!ce_skip_worktree(ce) && (o->reset || ce_uptodate(ce)))) |
203a2fe1 | 858 | return 0; |
076b0adc JS |
859 | |
860 | if (!lstat(ce->name, &st)) { | |
56cac48c | 861 | unsigned changed = ie_match_stat(o->src_index, ce, &st, CE_MATCH_IGNORE_VALID|CE_MATCH_IGNORE_SKIP_WORKTREE); |
076b0adc | 862 | if (!changed) |
203a2fe1 | 863 | return 0; |
936492d3 JH |
864 | /* |
865 | * NEEDSWORK: the current default policy is to allow | |
866 | * submodule to be out of sync wrt the supermodule | |
867 | * index. This needs to be tightened later for | |
868 | * submodules that are marked to be automatically | |
869 | * checked out. | |
870 | */ | |
7a51ed66 | 871 | if (S_ISGITLINK(ce->ce_mode)) |
203a2fe1 | 872 | return 0; |
076b0adc JS |
873 | errno = 0; |
874 | } | |
076b0adc | 875 | if (errno == ENOENT) |
203a2fe1 | 876 | return 0; |
17e46426 | 877 | return o->gently ? -1 : |
35a5aa79 NTND |
878 | error(error_msg, ce->name); |
879 | } | |
880 | ||
881 | static int verify_uptodate(struct cache_entry *ce, | |
882 | struct unpack_trees_options *o) | |
883 | { | |
f1f523ea NTND |
884 | if (!o->skip_sparse_checkout && will_have_skip_worktree(ce, o)) |
885 | return 0; | |
35a5aa79 | 886 | return verify_uptodate_1(ce, o, ERRORMSG(o, not_uptodate_file)); |
076b0adc JS |
887 | } |
888 | ||
e800ec9d NTND |
889 | static int verify_uptodate_sparse(struct cache_entry *ce, |
890 | struct unpack_trees_options *o) | |
891 | { | |
892 | return verify_uptodate_1(ce, o, ERRORMSG(o, sparse_not_uptodate_file)); | |
076b0adc JS |
893 | } |
894 | ||
bc052d7f | 895 | static void invalidate_ce_path(struct cache_entry *ce, struct unpack_trees_options *o) |
076b0adc JS |
896 | { |
897 | if (ce) | |
34110cd4 | 898 | cache_tree_invalidate_path(o->src_index->cache_tree, ce->name); |
076b0adc JS |
899 | } |
900 | ||
0cf73755 SV |
901 | /* |
902 | * Check that checking out ce->sha1 in subdir ce->name is not | |
903 | * going to overwrite any working files. | |
904 | * | |
905 | * Currently, git does not checkout subprojects during a superproject | |
906 | * checkout, so it is not going to overwrite anything. | |
907 | */ | |
908 | static int verify_clean_submodule(struct cache_entry *ce, const char *action, | |
909 | struct unpack_trees_options *o) | |
910 | { | |
911 | return 0; | |
912 | } | |
913 | ||
914 | static int verify_clean_subdirectory(struct cache_entry *ce, const char *action, | |
c8193534 JH |
915 | struct unpack_trees_options *o) |
916 | { | |
917 | /* | |
0cf73755 | 918 | * we are about to extract "ce->name"; we would not want to lose |
c8193534 JH |
919 | * anything in the existing directory there. |
920 | */ | |
921 | int namelen; | |
7b9e3ce0 | 922 | int i; |
c8193534 JH |
923 | struct dir_struct d; |
924 | char *pathbuf; | |
925 | int cnt = 0; | |
0cf73755 SV |
926 | unsigned char sha1[20]; |
927 | ||
7a51ed66 | 928 | if (S_ISGITLINK(ce->ce_mode) && |
0cf73755 SV |
929 | resolve_gitlink_ref(ce->name, "HEAD", sha1) == 0) { |
930 | /* If we are not going to update the submodule, then | |
931 | * we don't care. | |
932 | */ | |
933 | if (!hashcmp(sha1, ce->sha1)) | |
934 | return 0; | |
935 | return verify_clean_submodule(ce, action, o); | |
936 | } | |
c8193534 JH |
937 | |
938 | /* | |
939 | * First let's make sure we do not have a local modification | |
940 | * in that directory. | |
941 | */ | |
0cf73755 | 942 | namelen = strlen(ce->name); |
da165f47 JH |
943 | for (i = locate_in_src_index(ce, o); |
944 | i < o->src_index->cache_nr; | |
945 | i++) { | |
837e5fe9 CB |
946 | struct cache_entry *ce2 = o->src_index->cache[i]; |
947 | int len = ce_namelen(ce2); | |
c8193534 | 948 | if (len < namelen || |
837e5fe9 CB |
949 | strncmp(ce->name, ce2->name, namelen) || |
950 | ce2->name[namelen] != '/') | |
c8193534 JH |
951 | break; |
952 | /* | |
da165f47 JH |
953 | * ce2->name is an entry in the subdirectory to be |
954 | * removed. | |
c8193534 | 955 | */ |
837e5fe9 CB |
956 | if (!ce_stage(ce2)) { |
957 | if (verify_uptodate(ce2, o)) | |
203a2fe1 | 958 | return -1; |
837e5fe9 | 959 | add_entry(o, ce2, CE_REMOVE, 0); |
da165f47 | 960 | mark_ce_used(ce2, o); |
c8193534 JH |
961 | } |
962 | cnt++; | |
963 | } | |
964 | ||
965 | /* | |
966 | * Then we need to make sure that we do not lose a locally | |
967 | * present file that is not ignored. | |
968 | */ | |
969 | pathbuf = xmalloc(namelen + 2); | |
0cf73755 | 970 | memcpy(pathbuf, ce->name, namelen); |
c8193534 JH |
971 | strcpy(pathbuf+namelen, "/"); |
972 | ||
973 | memset(&d, 0, sizeof(d)); | |
974 | if (o->dir) | |
975 | d.exclude_per_dir = o->dir->exclude_per_dir; | |
dba2e203 | 976 | i = read_directory(&d, pathbuf, namelen+1, NULL); |
c8193534 | 977 | if (i) |
17e46426 | 978 | return o->gently ? -1 : |
8ccba008 | 979 | error(ERRORMSG(o, not_uptodate_dir), ce->name); |
c8193534 JH |
980 | free(pathbuf); |
981 | return cnt; | |
982 | } | |
983 | ||
32260ad5 LT |
984 | /* |
985 | * This gets called when there was no index entry for the tree entry 'dst', | |
986 | * but we found a file in the working tree that 'lstat()' said was fine, | |
987 | * and we're on a case-insensitive filesystem. | |
988 | * | |
989 | * See if we can find a case-insensitive match in the index that also | |
990 | * matches the stat information, and assume it's that other file! | |
991 | */ | |
992 | static int icase_exists(struct unpack_trees_options *o, struct cache_entry *dst, struct stat *st) | |
993 | { | |
994 | struct cache_entry *src; | |
995 | ||
996 | src = index_name_exists(o->src_index, dst->name, ce_namelen(dst), 1); | |
56cac48c | 997 | return src && !ie_match_stat(o->src_index, src, st, CE_MATCH_IGNORE_VALID|CE_MATCH_IGNORE_SKIP_WORKTREE); |
32260ad5 LT |
998 | } |
999 | ||
076b0adc JS |
1000 | /* |
1001 | * We do not want to remove or overwrite a working tree file that | |
f8a9d428 | 1002 | * is not tracked, unless it is ignored. |
076b0adc | 1003 | */ |
35a5aa79 NTND |
1004 | static int verify_absent_1(struct cache_entry *ce, const char *action, |
1005 | struct unpack_trees_options *o, | |
1006 | const char *error_msg) | |
076b0adc JS |
1007 | { |
1008 | struct stat st; | |
1009 | ||
1010 | if (o->index_only || o->reset || !o->update) | |
203a2fe1 | 1011 | return 0; |
c8193534 | 1012 | |
57199892 | 1013 | if (has_symlink_or_noent_leading_path(ce->name, ce_namelen(ce))) |
203a2fe1 | 1014 | return 0; |
ec0603e1 | 1015 | |
0cf73755 | 1016 | if (!lstat(ce->name, &st)) { |
6831a88a | 1017 | int dtype = ce_to_dtype(ce); |
df292c79 | 1018 | struct cache_entry *result; |
c8193534 | 1019 | |
32260ad5 LT |
1020 | /* |
1021 | * It may be that the 'lstat()' succeeded even though | |
1022 | * target 'ce' was absent, because there is an old | |
1023 | * entry that is different only in case.. | |
1024 | * | |
1025 | * Ignore that lstat() if it matches. | |
1026 | */ | |
1027 | if (ignore_case && icase_exists(o, ce, &st)) | |
1028 | return 0; | |
1029 | ||
6831a88a | 1030 | if (o->dir && excluded(o->dir, ce->name, &dtype)) |
c8193534 | 1031 | /* |
0cf73755 | 1032 | * ce->name is explicitly excluded, so it is Ok to |
c8193534 JH |
1033 | * overwrite it. |
1034 | */ | |
203a2fe1 | 1035 | return 0; |
c8193534 JH |
1036 | if (S_ISDIR(st.st_mode)) { |
1037 | /* | |
1038 | * We are checking out path "foo" and | |
1039 | * found "foo/." in the working tree. | |
1040 | * This is tricky -- if we have modified | |
1041 | * files that are in "foo/" we would lose | |
6caa7b55 | 1042 | * them. |
c8193534 | 1043 | */ |
da165f47 JH |
1044 | if (verify_clean_subdirectory(ce, action, o) < 0) |
1045 | return -1; | |
203a2fe1 | 1046 | return 0; |
c8193534 JH |
1047 | } |
1048 | ||
1049 | /* | |
1050 | * The previous round may already have decided to | |
1051 | * delete this path, which is in a subdirectory that | |
1052 | * is being replaced with a blob. | |
1053 | */ | |
cd2fef59 | 1054 | result = index_name_exists(&o->result, ce->name, ce_namelen(ce), 0); |
df292c79 LT |
1055 | if (result) { |
1056 | if (result->ce_flags & CE_REMOVE) | |
203a2fe1 | 1057 | return 0; |
c8193534 JH |
1058 | } |
1059 | ||
17e46426 | 1060 | return o->gently ? -1 : |
8ccba008 | 1061 | error(ERRORMSG(o, would_lose_untracked), ce->name, action); |
c8193534 | 1062 | } |
203a2fe1 | 1063 | return 0; |
076b0adc | 1064 | } |
35a5aa79 NTND |
1065 | static int verify_absent(struct cache_entry *ce, const char *action, |
1066 | struct unpack_trees_options *o) | |
1067 | { | |
f1f523ea NTND |
1068 | if (!o->skip_sparse_checkout && will_have_skip_worktree(ce, o)) |
1069 | return 0; | |
35a5aa79 NTND |
1070 | return verify_absent_1(ce, action, o, ERRORMSG(o, would_lose_untracked)); |
1071 | } | |
076b0adc | 1072 | |
e800ec9d NTND |
1073 | static int verify_absent_sparse(struct cache_entry *ce, const char *action, |
1074 | struct unpack_trees_options *o) | |
1075 | { | |
1076 | return verify_absent_1(ce, action, o, ERRORMSG(o, would_lose_orphaned)); | |
1077 | } | |
076b0adc JS |
1078 | |
1079 | static int merged_entry(struct cache_entry *merge, struct cache_entry *old, | |
1080 | struct unpack_trees_options *o) | |
1081 | { | |
7f8ab8dc LT |
1082 | int update = CE_UPDATE; |
1083 | ||
e11d7b59 JH |
1084 | if (!old) { |
1085 | if (verify_absent(merge, "overwritten", o)) | |
1086 | return -1; | |
1087 | invalidate_ce_path(merge, o); | |
1088 | } else if (!(old->ce_flags & CE_CONFLICTED)) { | |
076b0adc JS |
1089 | /* |
1090 | * See if we can re-use the old CE directly? | |
1091 | * That way we get the uptodate stat info. | |
1092 | * | |
7f8ab8dc LT |
1093 | * This also removes the UPDATE flag on a match; otherwise |
1094 | * we will end up overwriting local changes in the work tree. | |
076b0adc JS |
1095 | */ |
1096 | if (same(old, merge)) { | |
eb7a2f1d | 1097 | copy_cache_entry(merge, old); |
7f8ab8dc | 1098 | update = 0; |
076b0adc | 1099 | } else { |
203a2fe1 DB |
1100 | if (verify_uptodate(old, o)) |
1101 | return -1; | |
32f54ca3 NTND |
1102 | if (ce_skip_worktree(old)) |
1103 | update |= CE_SKIP_WORKTREE; | |
bc052d7f | 1104 | invalidate_ce_path(old, o); |
076b0adc | 1105 | } |
e11d7b59 JH |
1106 | } else { |
1107 | /* | |
1108 | * Previously unmerged entry left as an existence | |
1109 | * marker by read_index_unmerged(); | |
1110 | */ | |
1111 | invalidate_ce_path(old, o); | |
076b0adc JS |
1112 | } |
1113 | ||
7f8ab8dc | 1114 | add_entry(o, merge, update, CE_STAGEMASK); |
076b0adc JS |
1115 | return 1; |
1116 | } | |
1117 | ||
1118 | static int deleted_entry(struct cache_entry *ce, struct cache_entry *old, | |
1119 | struct unpack_trees_options *o) | |
1120 | { | |
34110cd4 LT |
1121 | /* Did it exist in the index? */ |
1122 | if (!old) { | |
203a2fe1 DB |
1123 | if (verify_absent(ce, "removed", o)) |
1124 | return -1; | |
34110cd4 LT |
1125 | return 0; |
1126 | } | |
e11d7b59 | 1127 | if (!(old->ce_flags & CE_CONFLICTED) && verify_uptodate(old, o)) |
34110cd4 LT |
1128 | return -1; |
1129 | add_entry(o, ce, CE_REMOVE, 0); | |
bc052d7f | 1130 | invalidate_ce_path(ce, o); |
076b0adc JS |
1131 | return 1; |
1132 | } | |
1133 | ||
7f7932ab | 1134 | static int keep_entry(struct cache_entry *ce, struct unpack_trees_options *o) |
076b0adc | 1135 | { |
34110cd4 | 1136 | add_entry(o, ce, 0, 0); |
076b0adc JS |
1137 | return 1; |
1138 | } | |
1139 | ||
1140 | #if DBRT_DEBUG | |
1141 | static void show_stage_entry(FILE *o, | |
1142 | const char *label, const struct cache_entry *ce) | |
1143 | { | |
1144 | if (!ce) | |
1145 | fprintf(o, "%s (missing)\n", label); | |
1146 | else | |
1147 | fprintf(o, "%s%06o %s %d\t%s\n", | |
1148 | label, | |
7a51ed66 | 1149 | ce->ce_mode, |
076b0adc JS |
1150 | sha1_to_hex(ce->sha1), |
1151 | ce_stage(ce), | |
1152 | ce->name); | |
1153 | } | |
1154 | #endif | |
1155 | ||
34110cd4 | 1156 | int threeway_merge(struct cache_entry **stages, struct unpack_trees_options *o) |
076b0adc JS |
1157 | { |
1158 | struct cache_entry *index; | |
1159 | struct cache_entry *head; | |
1160 | struct cache_entry *remote = stages[o->head_idx + 1]; | |
1161 | int count; | |
1162 | int head_match = 0; | |
1163 | int remote_match = 0; | |
076b0adc JS |
1164 | |
1165 | int df_conflict_head = 0; | |
1166 | int df_conflict_remote = 0; | |
1167 | ||
1168 | int any_anc_missing = 0; | |
1169 | int no_anc_exists = 1; | |
1170 | int i; | |
1171 | ||
1172 | for (i = 1; i < o->head_idx; i++) { | |
4c4caafc | 1173 | if (!stages[i] || stages[i] == o->df_conflict_entry) |
076b0adc | 1174 | any_anc_missing = 1; |
4c4caafc | 1175 | else |
076b0adc | 1176 | no_anc_exists = 0; |
076b0adc JS |
1177 | } |
1178 | ||
1179 | index = stages[0]; | |
1180 | head = stages[o->head_idx]; | |
1181 | ||
1182 | if (head == o->df_conflict_entry) { | |
1183 | df_conflict_head = 1; | |
1184 | head = NULL; | |
1185 | } | |
1186 | ||
1187 | if (remote == o->df_conflict_entry) { | |
1188 | df_conflict_remote = 1; | |
1189 | remote = NULL; | |
1190 | } | |
1191 | ||
cee2d6ae JH |
1192 | /* |
1193 | * First, if there's a #16 situation, note that to prevent #13 | |
076b0adc JS |
1194 | * and #14. |
1195 | */ | |
1196 | if (!same(remote, head)) { | |
1197 | for (i = 1; i < o->head_idx; i++) { | |
1198 | if (same(stages[i], head)) { | |
1199 | head_match = i; | |
1200 | } | |
1201 | if (same(stages[i], remote)) { | |
1202 | remote_match = i; | |
1203 | } | |
1204 | } | |
1205 | } | |
1206 | ||
cee2d6ae JH |
1207 | /* |
1208 | * We start with cases where the index is allowed to match | |
076b0adc JS |
1209 | * something other than the head: #14(ALT) and #2ALT, where it |
1210 | * is permitted to match the result instead. | |
1211 | */ | |
1212 | /* #14, #14ALT, #2ALT */ | |
1213 | if (remote && !df_conflict_head && head_match && !remote_match) { | |
1214 | if (index && !same(index, remote) && !same(index, head)) | |
8ccba008 | 1215 | return o->gently ? -1 : reject_merge(index, o); |
076b0adc JS |
1216 | return merged_entry(remote, index, o); |
1217 | } | |
1218 | /* | |
1219 | * If we have an entry in the index cache, then we want to | |
1220 | * make sure that it matches head. | |
1221 | */ | |
4e7c4571 | 1222 | if (index && !same(index, head)) |
8ccba008 | 1223 | return o->gently ? -1 : reject_merge(index, o); |
076b0adc JS |
1224 | |
1225 | if (head) { | |
1226 | /* #5ALT, #15 */ | |
1227 | if (same(head, remote)) | |
1228 | return merged_entry(head, index, o); | |
1229 | /* #13, #3ALT */ | |
1230 | if (!df_conflict_remote && remote_match && !head_match) | |
1231 | return merged_entry(head, index, o); | |
1232 | } | |
1233 | ||
1234 | /* #1 */ | |
34110cd4 | 1235 | if (!head && !remote && any_anc_missing) |
076b0adc JS |
1236 | return 0; |
1237 | ||
cee2d6ae JH |
1238 | /* |
1239 | * Under the "aggressive" rule, we resolve mostly trivial | |
076b0adc JS |
1240 | * cases that we historically had git-merge-one-file resolve. |
1241 | */ | |
1242 | if (o->aggressive) { | |
cee2d6ae JH |
1243 | int head_deleted = !head; |
1244 | int remote_deleted = !remote; | |
0cf73755 | 1245 | struct cache_entry *ce = NULL; |
4c4caafc JH |
1246 | |
1247 | if (index) | |
0cf73755 | 1248 | ce = index; |
4c4caafc | 1249 | else if (head) |
0cf73755 | 1250 | ce = head; |
4c4caafc | 1251 | else if (remote) |
0cf73755 | 1252 | ce = remote; |
4c4caafc JH |
1253 | else { |
1254 | for (i = 1; i < o->head_idx; i++) { | |
1255 | if (stages[i] && stages[i] != o->df_conflict_entry) { | |
0cf73755 | 1256 | ce = stages[i]; |
4c4caafc JH |
1257 | break; |
1258 | } | |
1259 | } | |
1260 | } | |
1261 | ||
076b0adc JS |
1262 | /* |
1263 | * Deleted in both. | |
1264 | * Deleted in one and unchanged in the other. | |
1265 | */ | |
1266 | if ((head_deleted && remote_deleted) || | |
1267 | (head_deleted && remote && remote_match) || | |
1268 | (remote_deleted && head && head_match)) { | |
1269 | if (index) | |
1270 | return deleted_entry(index, index, o); | |
34110cd4 | 1271 | if (ce && !head_deleted) { |
203a2fe1 DB |
1272 | if (verify_absent(ce, "removed", o)) |
1273 | return -1; | |
1274 | } | |
076b0adc JS |
1275 | return 0; |
1276 | } | |
1277 | /* | |
1278 | * Added in both, identically. | |
1279 | */ | |
1280 | if (no_anc_exists && head && remote && same(head, remote)) | |
1281 | return merged_entry(head, index, o); | |
1282 | ||
1283 | } | |
1284 | ||
1285 | /* Below are "no merge" cases, which require that the index be | |
1286 | * up-to-date to avoid the files getting overwritten with | |
1287 | * conflict resolution files. | |
1288 | */ | |
1289 | if (index) { | |
203a2fe1 DB |
1290 | if (verify_uptodate(index, o)) |
1291 | return -1; | |
076b0adc | 1292 | } |
076b0adc JS |
1293 | |
1294 | o->nontrivial_merge = 1; | |
1295 | ||
ea4b52a8 | 1296 | /* #2, #3, #4, #6, #7, #9, #10, #11. */ |
076b0adc JS |
1297 | count = 0; |
1298 | if (!head_match || !remote_match) { | |
1299 | for (i = 1; i < o->head_idx; i++) { | |
4c4caafc | 1300 | if (stages[i] && stages[i] != o->df_conflict_entry) { |
7f7932ab | 1301 | keep_entry(stages[i], o); |
076b0adc JS |
1302 | count++; |
1303 | break; | |
1304 | } | |
1305 | } | |
1306 | } | |
1307 | #if DBRT_DEBUG | |
1308 | else { | |
1309 | fprintf(stderr, "read-tree: warning #16 detected\n"); | |
1310 | show_stage_entry(stderr, "head ", stages[head_match]); | |
1311 | show_stage_entry(stderr, "remote ", stages[remote_match]); | |
1312 | } | |
1313 | #endif | |
7f7932ab JH |
1314 | if (head) { count += keep_entry(head, o); } |
1315 | if (remote) { count += keep_entry(remote, o); } | |
076b0adc JS |
1316 | return count; |
1317 | } | |
1318 | ||
1319 | /* | |
1320 | * Two-way merge. | |
1321 | * | |
1322 | * The rule is to "carry forward" what is in the index without losing | |
a75d7b54 | 1323 | * information across a "fast-forward", favoring a successful merge |
076b0adc JS |
1324 | * over a merge failure when it makes sense. For details of the |
1325 | * "carry forward" rule, please see <Documentation/git-read-tree.txt>. | |
1326 | * | |
1327 | */ | |
34110cd4 | 1328 | int twoway_merge(struct cache_entry **src, struct unpack_trees_options *o) |
076b0adc JS |
1329 | { |
1330 | struct cache_entry *current = src[0]; | |
b8ba1535 JH |
1331 | struct cache_entry *oldtree = src[1]; |
1332 | struct cache_entry *newtree = src[2]; | |
076b0adc JS |
1333 | |
1334 | if (o->merge_size != 2) | |
1335 | return error("Cannot do a twoway merge of %d trees", | |
1336 | o->merge_size); | |
1337 | ||
b8ba1535 JH |
1338 | if (oldtree == o->df_conflict_entry) |
1339 | oldtree = NULL; | |
1340 | if (newtree == o->df_conflict_entry) | |
1341 | newtree = NULL; | |
1342 | ||
076b0adc JS |
1343 | if (current) { |
1344 | if ((!oldtree && !newtree) || /* 4 and 5 */ | |
1345 | (!oldtree && newtree && | |
1346 | same(current, newtree)) || /* 6 and 7 */ | |
1347 | (oldtree && newtree && | |
1348 | same(oldtree, newtree)) || /* 14 and 15 */ | |
1349 | (oldtree && newtree && | |
b8ba1535 | 1350 | !same(oldtree, newtree) && /* 18 and 19 */ |
076b0adc | 1351 | same(current, newtree))) { |
7f7932ab | 1352 | return keep_entry(current, o); |
076b0adc JS |
1353 | } |
1354 | else if (oldtree && !newtree && same(current, oldtree)) { | |
1355 | /* 10 or 11 */ | |
1356 | return deleted_entry(oldtree, current, o); | |
1357 | } | |
1358 | else if (oldtree && newtree && | |
1359 | same(current, oldtree) && !same(current, newtree)) { | |
1360 | /* 20 or 21 */ | |
1361 | return merged_entry(newtree, current, o); | |
1362 | } | |
1363 | else { | |
1364 | /* all other failures */ | |
1365 | if (oldtree) | |
8ccba008 | 1366 | return o->gently ? -1 : reject_merge(oldtree, o); |
076b0adc | 1367 | if (current) |
8ccba008 | 1368 | return o->gently ? -1 : reject_merge(current, o); |
076b0adc | 1369 | if (newtree) |
8ccba008 | 1370 | return o->gently ? -1 : reject_merge(newtree, o); |
076b0adc JS |
1371 | return -1; |
1372 | } | |
1373 | } | |
55218834 JH |
1374 | else if (newtree) { |
1375 | if (oldtree && !o->initial_checkout) { | |
1376 | /* | |
1377 | * deletion of the path was staged; | |
1378 | */ | |
1379 | if (same(oldtree, newtree)) | |
1380 | return 1; | |
1381 | return reject_merge(oldtree, o); | |
1382 | } | |
076b0adc | 1383 | return merged_entry(newtree, current, o); |
55218834 | 1384 | } |
d699676d | 1385 | return deleted_entry(oldtree, current, o); |
076b0adc JS |
1386 | } |
1387 | ||
1388 | /* | |
1389 | * Bind merge. | |
1390 | * | |
1391 | * Keep the index entries at stage0, collapse stage1 but make sure | |
1392 | * stage0 does not have anything there. | |
1393 | */ | |
1394 | int bind_merge(struct cache_entry **src, | |
34110cd4 | 1395 | struct unpack_trees_options *o) |
076b0adc JS |
1396 | { |
1397 | struct cache_entry *old = src[0]; | |
1398 | struct cache_entry *a = src[1]; | |
1399 | ||
1400 | if (o->merge_size != 1) | |
1401 | return error("Cannot do a bind merge of %d trees\n", | |
1402 | o->merge_size); | |
1403 | if (a && old) | |
17e46426 | 1404 | return o->gently ? -1 : |
8ccba008 | 1405 | error(ERRORMSG(o, bind_overlap), a->name, old->name); |
076b0adc | 1406 | if (!a) |
7f7932ab | 1407 | return keep_entry(old, o); |
076b0adc JS |
1408 | else |
1409 | return merged_entry(a, NULL, o); | |
1410 | } | |
1411 | ||
1412 | /* | |
1413 | * One-way merge. | |
1414 | * | |
1415 | * The rule is: | |
1416 | * - take the stat information from stage0, take the data from stage1 | |
1417 | */ | |
34110cd4 | 1418 | int oneway_merge(struct cache_entry **src, struct unpack_trees_options *o) |
076b0adc JS |
1419 | { |
1420 | struct cache_entry *old = src[0]; | |
1421 | struct cache_entry *a = src[1]; | |
1422 | ||
1423 | if (o->merge_size != 1) | |
1424 | return error("Cannot do a oneway merge of %d trees", | |
1425 | o->merge_size); | |
1426 | ||
78d3b06e | 1427 | if (!a || a == o->df_conflict_entry) |
076b0adc | 1428 | return deleted_entry(old, old, o); |
34110cd4 | 1429 | |
076b0adc | 1430 | if (old && same(old, a)) { |
34110cd4 | 1431 | int update = 0; |
52030836 | 1432 | if (o->reset && !ce_uptodate(old) && !ce_skip_worktree(old)) { |
076b0adc JS |
1433 | struct stat st; |
1434 | if (lstat(old->name, &st) || | |
56cac48c | 1435 | ie_match_stat(o->src_index, old, &st, CE_MATCH_IGNORE_VALID|CE_MATCH_IGNORE_SKIP_WORKTREE)) |
34110cd4 | 1436 | update |= CE_UPDATE; |
076b0adc | 1437 | } |
34110cd4 LT |
1438 | add_entry(o, old, update, 0); |
1439 | return 0; | |
076b0adc JS |
1440 | } |
1441 | return merged_entry(a, old, o); | |
1442 | } |