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Commit | Line | Data |
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9047ebbc MV |
1 | /* |
2 | * Recursive Merge algorithm stolen from git-merge-recursive.py by | |
3 | * Fredrik Kuivinen. | |
4 | * The thieves were Alex Riesen and Johannes Schindelin, in June/July 2006 | |
5 | */ | |
6 | #include "cache.h" | |
b2141fc1 | 7 | #include "config.h" |
1c4b6604 | 8 | #include "advice.h" |
697cc8ef | 9 | #include "lockfile.h" |
9047ebbc MV |
10 | #include "cache-tree.h" |
11 | #include "commit.h" | |
12 | #include "blob.h" | |
13 | #include "builtin.h" | |
14 | #include "tree-walk.h" | |
15 | #include "diff.h" | |
16 | #include "diffcore.h" | |
17 | #include "tag.h" | |
18 | #include "unpack-trees.h" | |
19 | #include "string-list.h" | |
20 | #include "xdiff-interface.h" | |
21 | #include "ll-merge.h" | |
9047ebbc MV |
22 | #include "attr.h" |
23 | #include "merge-recursive.h" | |
9800c0df | 24 | #include "dir.h" |
68d03e4a | 25 | #include "submodule.h" |
9047ebbc | 26 | |
fc65b00d KW |
27 | struct path_hashmap_entry { |
28 | struct hashmap_entry e; | |
29 | char path[FLEX_ARRAY]; | |
30 | }; | |
31 | ||
32 | static int path_hashmap_cmp(const void *cmp_data, | |
33 | const void *entry, | |
34 | const void *entry_or_key, | |
35 | const void *keydata) | |
36 | { | |
37 | const struct path_hashmap_entry *a = entry; | |
38 | const struct path_hashmap_entry *b = entry_or_key; | |
39 | const char *key = keydata; | |
40 | ||
41 | if (ignore_case) | |
42 | return strcasecmp(a->path, key ? key : b->path); | |
43 | else | |
44 | return strcmp(a->path, key ? key : b->path); | |
45 | } | |
46 | ||
47 | static unsigned int path_hash(const char *path) | |
48 | { | |
49 | return ignore_case ? strihash(path) : strhash(path); | |
50 | } | |
51 | ||
7fe40b88 EN |
52 | static struct dir_rename_entry *dir_rename_find_entry(struct hashmap *hashmap, |
53 | char *dir) | |
54 | { | |
55 | struct dir_rename_entry key; | |
56 | ||
57 | if (dir == NULL) | |
58 | return NULL; | |
59 | hashmap_entry_init(&key, strhash(dir)); | |
60 | key.dir = dir; | |
61 | return hashmap_get(hashmap, &key, NULL); | |
62 | } | |
63 | ||
64 | static int dir_rename_cmp(const void *unused_cmp_data, | |
65 | const void *entry, | |
66 | const void *entry_or_key, | |
67 | const void *unused_keydata) | |
68 | { | |
69 | const struct dir_rename_entry *e1 = entry; | |
70 | const struct dir_rename_entry *e2 = entry_or_key; | |
71 | ||
72 | return strcmp(e1->dir, e2->dir); | |
73 | } | |
74 | ||
75 | static void dir_rename_init(struct hashmap *map) | |
76 | { | |
77 | hashmap_init(map, dir_rename_cmp, NULL, 0); | |
78 | } | |
79 | ||
80 | static void dir_rename_entry_init(struct dir_rename_entry *entry, | |
81 | char *directory) | |
82 | { | |
83 | hashmap_entry_init(entry, strhash(directory)); | |
84 | entry->dir = directory; | |
85 | entry->non_unique_new_dir = 0; | |
86 | strbuf_init(&entry->new_dir, 0); | |
87 | string_list_init(&entry->possible_new_dirs, 0); | |
88 | } | |
89 | ||
e95ab70a EN |
90 | static struct collision_entry *collision_find_entry(struct hashmap *hashmap, |
91 | char *target_file) | |
92 | { | |
93 | struct collision_entry key; | |
94 | ||
95 | hashmap_entry_init(&key, strhash(target_file)); | |
96 | key.target_file = target_file; | |
97 | return hashmap_get(hashmap, &key, NULL); | |
98 | } | |
99 | ||
100 | static int collision_cmp(void *unused_cmp_data, | |
101 | const struct collision_entry *e1, | |
102 | const struct collision_entry *e2, | |
103 | const void *unused_keydata) | |
104 | { | |
105 | return strcmp(e1->target_file, e2->target_file); | |
106 | } | |
107 | ||
108 | static void collision_init(struct hashmap *map) | |
109 | { | |
110 | hashmap_init(map, (hashmap_cmp_fn) collision_cmp, NULL, 0); | |
111 | } | |
112 | ||
bc9204d4 JS |
113 | static void flush_output(struct merge_options *o) |
114 | { | |
f1e2426b | 115 | if (o->buffer_output < 2 && o->obuf.len) { |
bc9204d4 JS |
116 | fputs(o->obuf.buf, stdout); |
117 | strbuf_reset(&o->obuf); | |
118 | } | |
119 | } | |
120 | ||
121 | static int err(struct merge_options *o, const char *err, ...) | |
122 | { | |
123 | va_list params; | |
124 | ||
f1e2426b JS |
125 | if (o->buffer_output < 2) |
126 | flush_output(o); | |
127 | else { | |
128 | strbuf_complete(&o->obuf, '\n'); | |
129 | strbuf_addstr(&o->obuf, "error: "); | |
130 | } | |
bc9204d4 JS |
131 | va_start(params, err); |
132 | strbuf_vaddf(&o->obuf, err, params); | |
133 | va_end(params); | |
f1e2426b JS |
134 | if (o->buffer_output > 1) |
135 | strbuf_addch(&o->obuf, '\n'); | |
136 | else { | |
137 | error("%s", o->obuf.buf); | |
138 | strbuf_reset(&o->obuf); | |
139 | } | |
bc9204d4 JS |
140 | |
141 | return -1; | |
142 | } | |
143 | ||
85e51b78 JH |
144 | static struct tree *shift_tree_object(struct tree *one, struct tree *two, |
145 | const char *subtree_shift) | |
9047ebbc | 146 | { |
f2fd0760 | 147 | struct object_id shifted; |
9047ebbc | 148 | |
85e51b78 | 149 | if (!*subtree_shift) { |
82db3d44 | 150 | shift_tree(&one->object.oid, &two->object.oid, &shifted, 0); |
85e51b78 | 151 | } else { |
82db3d44 | 152 | shift_tree_by(&one->object.oid, &two->object.oid, &shifted, |
85e51b78 JH |
153 | subtree_shift); |
154 | } | |
f2fd0760 | 155 | if (!oidcmp(&two->object.oid, &shifted)) |
9047ebbc | 156 | return two; |
740ee055 | 157 | return lookup_tree(&shifted); |
9047ebbc MV |
158 | } |
159 | ||
2af202be | 160 | static struct commit *make_virtual_commit(struct tree *tree, const char *comment) |
9047ebbc | 161 | { |
10322a0a | 162 | struct commit *commit = alloc_commit_node(); |
ae8e4c9c | 163 | |
a2571653 | 164 | set_merge_remote_desc(commit, comment, (struct object *)commit); |
9047ebbc | 165 | commit->tree = tree; |
9047ebbc MV |
166 | commit->object.parsed = 1; |
167 | return commit; | |
168 | } | |
169 | ||
170 | /* | |
171 | * Since we use get_tree_entry(), which does not put the read object into | |
172 | * the object pool, we cannot rely on a == b. | |
173 | */ | |
b4da9d62 | 174 | static int oid_eq(const struct object_id *a, const struct object_id *b) |
9047ebbc MV |
175 | { |
176 | if (!a && !b) | |
177 | return 2; | |
b4da9d62 | 178 | return a && b && oidcmp(a, b) == 0; |
9047ebbc MV |
179 | } |
180 | ||
25c39363 EN |
181 | enum rename_type { |
182 | RENAME_NORMAL = 0, | |
9c0743fe | 183 | RENAME_DIR, |
25c39363 | 184 | RENAME_DELETE, |
4f66dade | 185 | RENAME_ONE_FILE_TO_ONE, |
461f5041 EN |
186 | RENAME_ONE_FILE_TO_TWO, |
187 | RENAME_TWO_FILES_TO_ONE | |
25c39363 EN |
188 | }; |
189 | ||
4f66dade | 190 | struct rename_conflict_info { |
25c39363 EN |
191 | enum rename_type rename_type; |
192 | struct diff_filepair *pair1; | |
193 | struct diff_filepair *pair2; | |
194 | const char *branch1; | |
195 | const char *branch2; | |
196 | struct stage_data *dst_entry1; | |
197 | struct stage_data *dst_entry2; | |
232c635f EN |
198 | struct diff_filespec ren1_other; |
199 | struct diff_filespec ren2_other; | |
25c39363 EN |
200 | }; |
201 | ||
9047ebbc MV |
202 | /* |
203 | * Since we want to write the index eventually, we cannot reuse the index | |
204 | * for these (temporary) data. | |
205 | */ | |
9cba13ca JN |
206 | struct stage_data { |
207 | struct { | |
9047ebbc | 208 | unsigned mode; |
fd429e98 | 209 | struct object_id oid; |
9047ebbc | 210 | } stages[4]; |
4f66dade | 211 | struct rename_conflict_info *rename_conflict_info; |
9047ebbc MV |
212 | unsigned processed:1; |
213 | }; | |
214 | ||
4f66dade EN |
215 | static inline void setup_rename_conflict_info(enum rename_type rename_type, |
216 | struct diff_filepair *pair1, | |
217 | struct diff_filepair *pair2, | |
218 | const char *branch1, | |
219 | const char *branch2, | |
220 | struct stage_data *dst_entry1, | |
232c635f EN |
221 | struct stage_data *dst_entry2, |
222 | struct merge_options *o, | |
223 | struct stage_data *src_entry1, | |
224 | struct stage_data *src_entry2) | |
25c39363 | 225 | { |
4f66dade | 226 | struct rename_conflict_info *ci = xcalloc(1, sizeof(struct rename_conflict_info)); |
25c39363 EN |
227 | ci->rename_type = rename_type; |
228 | ci->pair1 = pair1; | |
229 | ci->branch1 = branch1; | |
230 | ci->branch2 = branch2; | |
231 | ||
232 | ci->dst_entry1 = dst_entry1; | |
4f66dade | 233 | dst_entry1->rename_conflict_info = ci; |
25c39363 EN |
234 | dst_entry1->processed = 0; |
235 | ||
236 | assert(!pair2 == !dst_entry2); | |
237 | if (dst_entry2) { | |
238 | ci->dst_entry2 = dst_entry2; | |
239 | ci->pair2 = pair2; | |
4f66dade | 240 | dst_entry2->rename_conflict_info = ci; |
25c39363 | 241 | } |
232c635f EN |
242 | |
243 | if (rename_type == RENAME_TWO_FILES_TO_ONE) { | |
244 | /* | |
245 | * For each rename, there could have been | |
246 | * modifications on the side of history where that | |
247 | * file was not renamed. | |
248 | */ | |
249 | int ostage1 = o->branch1 == branch1 ? 3 : 2; | |
250 | int ostage2 = ostage1 ^ 1; | |
251 | ||
252 | ci->ren1_other.path = pair1->one->path; | |
fd429e98 | 253 | oidcpy(&ci->ren1_other.oid, &src_entry1->stages[ostage1].oid); |
232c635f EN |
254 | ci->ren1_other.mode = src_entry1->stages[ostage1].mode; |
255 | ||
256 | ci->ren2_other.path = pair2->one->path; | |
fd429e98 | 257 | oidcpy(&ci->ren2_other.oid, &src_entry2->stages[ostage2].oid); |
232c635f | 258 | ci->ren2_other.mode = src_entry2->stages[ostage2].mode; |
25c39363 EN |
259 | } |
260 | } | |
261 | ||
8a2fce18 | 262 | static int show(struct merge_options *o, int v) |
9047ebbc | 263 | { |
5033639c | 264 | return (!o->call_depth && o->verbosity >= v) || o->verbosity >= 5; |
9047ebbc MV |
265 | } |
266 | ||
28bea9e5 | 267 | __attribute__((format (printf, 3, 4))) |
8a2fce18 | 268 | static void output(struct merge_options *o, int v, const char *fmt, ...) |
9047ebbc | 269 | { |
9047ebbc MV |
270 | va_list ap; |
271 | ||
8a2fce18 | 272 | if (!show(o, v)) |
9047ebbc MV |
273 | return; |
274 | ||
415792ed | 275 | strbuf_addchars(&o->obuf, ' ', o->call_depth * 2); |
9047ebbc MV |
276 | |
277 | va_start(ap, fmt); | |
ebeb6090 | 278 | strbuf_vaddf(&o->obuf, fmt, ap); |
9047ebbc MV |
279 | va_end(ap); |
280 | ||
294b2680 | 281 | strbuf_addch(&o->obuf, '\n'); |
8a2fce18 | 282 | if (!o->buffer_output) |
c7d84924 | 283 | flush_output(o); |
9047ebbc MV |
284 | } |
285 | ||
5033639c | 286 | static void output_commit_title(struct merge_options *o, struct commit *commit) |
9047ebbc | 287 | { |
dde75cb0 | 288 | strbuf_addchars(&o->obuf, ' ', o->call_depth * 2); |
9047ebbc | 289 | if (commit->util) |
dde75cb0 JS |
290 | strbuf_addf(&o->obuf, "virtual %s\n", |
291 | merge_remote_util(commit)->name); | |
9047ebbc | 292 | else { |
30e677e0 | 293 | strbuf_add_unique_abbrev(&o->obuf, &commit->object.oid, |
a94bb683 RS |
294 | DEFAULT_ABBREV); |
295 | strbuf_addch(&o->obuf, ' '); | |
9047ebbc | 296 | if (parse_commit(commit) != 0) |
a22ae753 | 297 | strbuf_addstr(&o->obuf, _("(bad commit)\n")); |
9047ebbc | 298 | else { |
49b7120e | 299 | const char *title; |
8597ea3a | 300 | const char *msg = get_commit_buffer(commit, NULL); |
bc6b8fc1 | 301 | int len = find_commit_subject(msg, &title); |
49b7120e | 302 | if (len) |
dde75cb0 | 303 | strbuf_addf(&o->obuf, "%.*s\n", len, title); |
bc6b8fc1 | 304 | unuse_commit_buffer(commit, msg); |
9047ebbc MV |
305 | } |
306 | } | |
dde75cb0 | 307 | flush_output(o); |
9047ebbc MV |
308 | } |
309 | ||
bc9204d4 JS |
310 | static int add_cacheinfo(struct merge_options *o, |
311 | unsigned int mode, const struct object_id *oid, | |
9047ebbc MV |
312 | const char *path, int stage, int refresh, int options) |
313 | { | |
314 | struct cache_entry *ce; | |
1335d76e JH |
315 | int ret; |
316 | ||
21bed620 | 317 | ce = make_cache_entry(mode, oid ? oid->hash : null_sha1, path, stage, 0); |
9047ebbc | 318 | if (!ce) |
bc9204d4 | 319 | return err(o, _("addinfo_cache failed for path '%s'"), path); |
1335d76e JH |
320 | |
321 | ret = add_cache_entry(ce, options); | |
322 | if (refresh) { | |
323 | struct cache_entry *nce; | |
324 | ||
325 | nce = refresh_cache_entry(ce, CE_MATCH_REFRESH | CE_MATCH_IGNORE_MISSING); | |
55e9f0e5 | 326 | if (!nce) |
1749053d | 327 | return err(o, _("addinfo_cache failed for path '%s'"), path); |
1335d76e JH |
328 | if (nce != ce) |
329 | ret = add_cache_entry(nce, options); | |
330 | } | |
331 | return ret; | |
9047ebbc MV |
332 | } |
333 | ||
9047ebbc MV |
334 | static void init_tree_desc_from_tree(struct tree_desc *desc, struct tree *tree) |
335 | { | |
336 | parse_tree(tree); | |
337 | init_tree_desc(desc, tree->buffer, tree->size); | |
338 | } | |
339 | ||
8b026eda | 340 | static int git_merge_trees(int index_only, |
9047ebbc MV |
341 | struct tree *common, |
342 | struct tree *head, | |
343 | struct tree *merge) | |
344 | { | |
345 | int rc; | |
346 | struct tree_desc t[3]; | |
8b026eda | 347 | struct unpack_trees_options opts; |
9047ebbc | 348 | |
8b026eda JH |
349 | memset(&opts, 0, sizeof(opts)); |
350 | if (index_only) | |
351 | opts.index_only = 1; | |
9047ebbc | 352 | else |
8b026eda JH |
353 | opts.update = 1; |
354 | opts.merge = 1; | |
355 | opts.head_idx = 2; | |
356 | opts.fn = threeway_merge; | |
357 | opts.src_index = &the_index; | |
358 | opts.dst_index = &the_index; | |
359 | setup_unpack_trees_porcelain(&opts, "merge"); | |
9047ebbc MV |
360 | |
361 | init_tree_desc_from_tree(t+0, common); | |
362 | init_tree_desc_from_tree(t+1, head); | |
363 | init_tree_desc_from_tree(t+2, merge); | |
364 | ||
8b026eda | 365 | rc = unpack_trees(3, t, &opts); |
9047ebbc MV |
366 | cache_tree_free(&active_cache_tree); |
367 | return rc; | |
368 | } | |
369 | ||
8a2fce18 | 370 | struct tree *write_tree_from_memory(struct merge_options *o) |
9047ebbc MV |
371 | { |
372 | struct tree *result = NULL; | |
373 | ||
374 | if (unmerged_cache()) { | |
375 | int i; | |
19c6a4f8 | 376 | fprintf(stderr, "BUG: There are unmerged index entries:\n"); |
9047ebbc | 377 | for (i = 0; i < active_nr; i++) { |
9c5e6c80 | 378 | const struct cache_entry *ce = active_cache[i]; |
9047ebbc | 379 | if (ce_stage(ce)) |
c43ba42e | 380 | fprintf(stderr, "BUG: %d %.*s\n", ce_stage(ce), |
19c6a4f8 | 381 | (int)ce_namelen(ce), ce->name); |
9047ebbc | 382 | } |
ef1177d1 | 383 | die("BUG: unmerged index entries in merge-recursive.c"); |
9047ebbc MV |
384 | } |
385 | ||
386 | if (!active_cache_tree) | |
387 | active_cache_tree = cache_tree(); | |
388 | ||
389 | if (!cache_tree_fully_valid(active_cache_tree) && | |
6003303a | 390 | cache_tree_update(&the_index, 0) < 0) { |
bc9204d4 | 391 | err(o, _("error building trees")); |
6003303a JS |
392 | return NULL; |
393 | } | |
9047ebbc | 394 | |
740ee055 | 395 | result = lookup_tree(&active_cache_tree->oid); |
9047ebbc MV |
396 | |
397 | return result; | |
398 | } | |
399 | ||
df46d77e | 400 | static int save_files_dirs(const struct object_id *oid, |
6a0b0b6d | 401 | struct strbuf *base, const char *path, |
9047ebbc MV |
402 | unsigned int mode, int stage, void *context) |
403 | { | |
fc65b00d | 404 | struct path_hashmap_entry *entry; |
6a0b0b6d | 405 | int baselen = base->len; |
696ee23c MV |
406 | struct merge_options *o = context; |
407 | ||
6a0b0b6d | 408 | strbuf_addstr(base, path); |
9047ebbc | 409 | |
fc65b00d KW |
410 | FLEX_ALLOC_MEM(entry, path, base->buf, base->len); |
411 | hashmap_entry_init(entry, path_hash(entry->path)); | |
412 | hashmap_add(&o->current_file_dir_set, entry); | |
9047ebbc | 413 | |
6a0b0b6d | 414 | strbuf_setlen(base, baselen); |
d3bee161 | 415 | return (S_ISDIR(mode) ? READ_TREE_RECURSIVE : 0); |
9047ebbc MV |
416 | } |
417 | ||
ef9c4dc3 | 418 | static void get_files_dirs(struct merge_options *o, struct tree *tree) |
9047ebbc | 419 | { |
f0096c06 | 420 | struct pathspec match_all; |
9a087274 | 421 | memset(&match_all, 0, sizeof(match_all)); |
ef9c4dc3 | 422 | read_tree_recursive(tree, "", 0, 0, &match_all, save_files_dirs, o); |
9047ebbc MV |
423 | } |
424 | ||
5b047ac0 EN |
425 | static int get_tree_entry_if_blob(const struct object_id *tree, |
426 | const char *path, | |
427 | struct object_id *hashy, | |
428 | unsigned int *mode_o) | |
429 | { | |
430 | int ret; | |
431 | ||
432 | ret = get_tree_entry(tree, path, hashy, mode_o); | |
433 | if (S_ISDIR(*mode_o)) { | |
434 | oidcpy(hashy, &null_oid); | |
435 | *mode_o = 0; | |
436 | } | |
437 | return ret; | |
438 | } | |
439 | ||
9047ebbc MV |
440 | /* |
441 | * Returns an index_entry instance which doesn't have to correspond to | |
442 | * a real cache entry in Git's index. | |
443 | */ | |
444 | static struct stage_data *insert_stage_data(const char *path, | |
445 | struct tree *o, struct tree *a, struct tree *b, | |
446 | struct string_list *entries) | |
447 | { | |
448 | struct string_list_item *item; | |
449 | struct stage_data *e = xcalloc(1, sizeof(struct stage_data)); | |
5b047ac0 EN |
450 | get_tree_entry_if_blob(&o->object.oid, path, |
451 | &e->stages[1].oid, &e->stages[1].mode); | |
452 | get_tree_entry_if_blob(&a->object.oid, path, | |
453 | &e->stages[2].oid, &e->stages[2].mode); | |
454 | get_tree_entry_if_blob(&b->object.oid, path, | |
455 | &e->stages[3].oid, &e->stages[3].mode); | |
78a395d3 | 456 | item = string_list_insert(entries, path); |
9047ebbc MV |
457 | item->util = e; |
458 | return e; | |
459 | } | |
460 | ||
461 | /* | |
462 | * Create a dictionary mapping file names to stage_data objects. The | |
463 | * dictionary contains one entry for every path with a non-zero stage entry. | |
464 | */ | |
465 | static struct string_list *get_unmerged(void) | |
466 | { | |
467 | struct string_list *unmerged = xcalloc(1, sizeof(struct string_list)); | |
468 | int i; | |
469 | ||
470 | unmerged->strdup_strings = 1; | |
471 | ||
472 | for (i = 0; i < active_nr; i++) { | |
473 | struct string_list_item *item; | |
474 | struct stage_data *e; | |
9c5e6c80 | 475 | const struct cache_entry *ce = active_cache[i]; |
9047ebbc MV |
476 | if (!ce_stage(ce)) |
477 | continue; | |
478 | ||
e8c8b713 | 479 | item = string_list_lookup(unmerged, ce->name); |
9047ebbc | 480 | if (!item) { |
78a395d3 | 481 | item = string_list_insert(unmerged, ce->name); |
9047ebbc MV |
482 | item->util = xcalloc(1, sizeof(struct stage_data)); |
483 | } | |
484 | e = item->util; | |
485 | e->stages[ce_stage(ce)].mode = ce->ce_mode; | |
99d1a986 | 486 | oidcpy(&e->stages[ce_stage(ce)].oid, &ce->oid); |
9047ebbc MV |
487 | } |
488 | ||
489 | return unmerged; | |
490 | } | |
491 | ||
fa6ca111 | 492 | static int string_list_df_name_compare(const char *one, const char *two) |
ef02b317 | 493 | { |
fa6ca111 NTND |
494 | int onelen = strlen(one); |
495 | int twolen = strlen(two); | |
f0fd4d05 EN |
496 | /* |
497 | * Here we only care that entries for D/F conflicts are | |
498 | * adjacent, in particular with the file of the D/F conflict | |
499 | * appearing before files below the corresponding directory. | |
500 | * The order of the rest of the list is irrelevant for us. | |
ef02b317 | 501 | * |
f0fd4d05 EN |
502 | * To achieve this, we sort with df_name_compare and provide |
503 | * the mode S_IFDIR so that D/F conflicts will sort correctly. | |
504 | * We use the mode S_IFDIR for everything else for simplicity, | |
505 | * since in other cases any changes in their order due to | |
506 | * sorting cause no problems for us. | |
507 | */ | |
fa6ca111 NTND |
508 | int cmp = df_name_compare(one, onelen, S_IFDIR, |
509 | two, twolen, S_IFDIR); | |
f0fd4d05 EN |
510 | /* |
511 | * Now that 'foo' and 'foo/bar' compare equal, we have to make sure | |
512 | * that 'foo' comes before 'foo/bar'. | |
ef02b317 | 513 | */ |
f0fd4d05 EN |
514 | if (cmp) |
515 | return cmp; | |
516 | return onelen - twolen; | |
517 | } | |
518 | ||
70cc3d36 EN |
519 | static void record_df_conflict_files(struct merge_options *o, |
520 | struct string_list *entries) | |
ef02b317 | 521 | { |
70cc3d36 | 522 | /* If there is a D/F conflict and the file for such a conflict |
f7d650c0 | 523 | * currently exist in the working tree, we want to allow it to be |
edd2faf5 EN |
524 | * removed to make room for the corresponding directory if needed. |
525 | * The files underneath the directories of such D/F conflicts will | |
526 | * be processed before the corresponding file involved in the D/F | |
527 | * conflict. If the D/F directory ends up being removed by the | |
528 | * merge, then we won't have to touch the D/F file. If the D/F | |
529 | * directory needs to be written to the working copy, then the D/F | |
530 | * file will simply be removed (in make_room_for_path()) to make | |
531 | * room for the necessary paths. Note that if both the directory | |
532 | * and the file need to be present, then the D/F file will be | |
533 | * reinstated with a new unique name at the time it is processed. | |
ef02b317 | 534 | */ |
af4941d4 | 535 | struct string_list df_sorted_entries = STRING_LIST_INIT_NODUP; |
ef02b317 | 536 | const char *last_file = NULL; |
c8516500 | 537 | int last_len = 0; |
ef02b317 EN |
538 | int i; |
539 | ||
0b30e812 EN |
540 | /* |
541 | * If we're merging merge-bases, we don't want to bother with | |
542 | * any working directory changes. | |
543 | */ | |
544 | if (o->call_depth) | |
545 | return; | |
546 | ||
f0fd4d05 | 547 | /* Ensure D/F conflicts are adjacent in the entries list. */ |
ef02b317 | 548 | for (i = 0; i < entries->nr; i++) { |
f701aae0 EN |
549 | struct string_list_item *next = &entries->items[i]; |
550 | string_list_append(&df_sorted_entries, next->string)->util = | |
551 | next->util; | |
552 | } | |
fa6ca111 NTND |
553 | df_sorted_entries.cmp = string_list_df_name_compare; |
554 | string_list_sort(&df_sorted_entries); | |
f0fd4d05 | 555 | |
70cc3d36 | 556 | string_list_clear(&o->df_conflict_file_set, 1); |
f701aae0 EN |
557 | for (i = 0; i < df_sorted_entries.nr; i++) { |
558 | const char *path = df_sorted_entries.items[i].string; | |
ef02b317 | 559 | int len = strlen(path); |
f701aae0 | 560 | struct stage_data *e = df_sorted_entries.items[i].util; |
ef02b317 EN |
561 | |
562 | /* | |
563 | * Check if last_file & path correspond to a D/F conflict; | |
564 | * i.e. whether path is last_file+'/'+<something>. | |
70cc3d36 EN |
565 | * If so, record that it's okay to remove last_file to make |
566 | * room for path and friends if needed. | |
ef02b317 EN |
567 | */ |
568 | if (last_file && | |
569 | len > last_len && | |
570 | memcmp(path, last_file, last_len) == 0 && | |
571 | path[last_len] == '/') { | |
70cc3d36 | 572 | string_list_insert(&o->df_conflict_file_set, last_file); |
ef02b317 EN |
573 | } |
574 | ||
575 | /* | |
576 | * Determine whether path could exist as a file in the | |
577 | * working directory as a possible D/F conflict. This | |
578 | * will only occur when it exists in stage 2 as a | |
579 | * file. | |
580 | */ | |
581 | if (S_ISREG(e->stages[2].mode) || S_ISLNK(e->stages[2].mode)) { | |
582 | last_file = path; | |
583 | last_len = len; | |
ef02b317 EN |
584 | } else { |
585 | last_file = NULL; | |
586 | } | |
587 | } | |
f701aae0 | 588 | string_list_clear(&df_sorted_entries, 0); |
ef02b317 EN |
589 | } |
590 | ||
9cba13ca | 591 | struct rename { |
9047ebbc | 592 | struct diff_filepair *pair; |
379fc378 EN |
593 | /* |
594 | * Purpose of src_entry and dst_entry: | |
595 | * | |
596 | * If 'before' is renamed to 'after' then src_entry will contain | |
597 | * the versions of 'before' from the merge_base, HEAD, and MERGE in | |
598 | * stages 1, 2, and 3; dst_entry will contain the respective | |
599 | * versions of 'after' in corresponding locations. Thus, we have a | |
600 | * total of six modes and oids, though some will be null. (Stage 0 | |
601 | * is ignored; we're interested in handling conflicts.) | |
602 | * | |
603 | * Since we don't turn on break-rewrites by default, neither | |
604 | * src_entry nor dst_entry can have all three of their stages have | |
605 | * non-null oids, meaning at most four of the six will be non-null. | |
606 | * Also, since this is a rename, both src_entry and dst_entry will | |
607 | * have at least one non-null oid, meaning at least two will be | |
608 | * non-null. Of the six oids, a typical rename will have three be | |
609 | * non-null. Only two implies a rename/delete, and four implies a | |
610 | * rename/add. | |
611 | */ | |
9047ebbc MV |
612 | struct stage_data *src_entry; |
613 | struct stage_data *dst_entry; | |
9c0743fe | 614 | unsigned add_turned_into_rename:1; |
9047ebbc MV |
615 | unsigned processed:1; |
616 | }; | |
617 | ||
bc9204d4 JS |
618 | static int update_stages(struct merge_options *opt, const char *path, |
619 | const struct diff_filespec *o, | |
650467cf EN |
620 | const struct diff_filespec *a, |
621 | const struct diff_filespec *b) | |
9047ebbc | 622 | { |
f53d3977 EN |
623 | |
624 | /* | |
625 | * NOTE: It is usually a bad idea to call update_stages on a path | |
626 | * before calling update_file on that same path, since it can | |
627 | * sometimes lead to spurious "refusing to lose untracked file..." | |
628 | * messages from update_file (via make_room_for path via | |
629 | * would_lose_untracked). Instead, reverse the order of the calls | |
630 | * (executing update_file first and then update_stages). | |
631 | */ | |
650467cf EN |
632 | int clear = 1; |
633 | int options = ADD_CACHE_OK_TO_ADD | ADD_CACHE_SKIP_DFCHECK; | |
9047ebbc MV |
634 | if (clear) |
635 | if (remove_file_from_cache(path)) | |
636 | return -1; | |
637 | if (o) | |
bc9204d4 | 638 | if (add_cacheinfo(opt, o->mode, &o->oid, path, 1, 0, options)) |
9047ebbc MV |
639 | return -1; |
640 | if (a) | |
bc9204d4 | 641 | if (add_cacheinfo(opt, a->mode, &a->oid, path, 2, 0, options)) |
9047ebbc MV |
642 | return -1; |
643 | if (b) | |
bc9204d4 | 644 | if (add_cacheinfo(opt, b->mode, &b->oid, path, 3, 0, options)) |
9047ebbc MV |
645 | return -1; |
646 | return 0; | |
647 | } | |
648 | ||
9c0743fe EN |
649 | static int update_stages_for_stage_data(struct merge_options *opt, |
650 | const char *path, | |
651 | const struct stage_data *stage_data) | |
652 | { | |
653 | struct diff_filespec o, a, b; | |
654 | ||
655 | o.mode = stage_data->stages[1].mode; | |
656 | oidcpy(&o.oid, &stage_data->stages[1].oid); | |
657 | ||
658 | a.mode = stage_data->stages[2].mode; | |
659 | oidcpy(&a.oid, &stage_data->stages[2].oid); | |
660 | ||
661 | b.mode = stage_data->stages[3].mode; | |
662 | oidcpy(&b.oid, &stage_data->stages[3].oid); | |
663 | ||
664 | return update_stages(opt, path, | |
665 | is_null_oid(&o.oid) ? NULL : &o, | |
666 | is_null_oid(&a.oid) ? NULL : &a, | |
667 | is_null_oid(&b.oid) ? NULL : &b); | |
668 | } | |
669 | ||
b8ddf164 EN |
670 | static void update_entry(struct stage_data *entry, |
671 | struct diff_filespec *o, | |
672 | struct diff_filespec *a, | |
673 | struct diff_filespec *b) | |
2ff739f9 | 674 | { |
2ff739f9 EN |
675 | entry->processed = 0; |
676 | entry->stages[1].mode = o->mode; | |
677 | entry->stages[2].mode = a->mode; | |
678 | entry->stages[3].mode = b->mode; | |
fd429e98 | 679 | oidcpy(&entry->stages[1].oid, &o->oid); |
680 | oidcpy(&entry->stages[2].oid, &a->oid); | |
681 | oidcpy(&entry->stages[3].oid, &b->oid); | |
2ff739f9 EN |
682 | } |
683 | ||
b7fa51da MV |
684 | static int remove_file(struct merge_options *o, int clean, |
685 | const char *path, int no_wd) | |
9047ebbc | 686 | { |
b7fa51da MV |
687 | int update_cache = o->call_depth || clean; |
688 | int update_working_directory = !o->call_depth && !no_wd; | |
9047ebbc MV |
689 | |
690 | if (update_cache) { | |
691 | if (remove_file_from_cache(path)) | |
692 | return -1; | |
693 | } | |
694 | if (update_working_directory) { | |
ae352c7f DT |
695 | if (ignore_case) { |
696 | struct cache_entry *ce; | |
697 | ce = cache_file_exists(path, strlen(path), ignore_case); | |
4cba2b01 | 698 | if (ce && ce_stage(ce) == 0 && strcmp(path, ce->name)) |
ae352c7f DT |
699 | return 0; |
700 | } | |
25755e84 | 701 | if (remove_path(path)) |
9047ebbc | 702 | return -1; |
9047ebbc MV |
703 | } |
704 | return 0; | |
705 | } | |
706 | ||
45bc131d JK |
707 | /* add a string to a strbuf, but converting "/" to "_" */ |
708 | static void add_flattened_path(struct strbuf *out, const char *s) | |
709 | { | |
710 | size_t i = out->len; | |
711 | strbuf_addstr(out, s); | |
712 | for (; i < out->len; i++) | |
713 | if (out->buf[i] == '/') | |
714 | out->buf[i] = '_'; | |
715 | } | |
716 | ||
696ee23c | 717 | static char *unique_path(struct merge_options *o, const char *path, const char *branch) |
9047ebbc | 718 | { |
fc65b00d | 719 | struct path_hashmap_entry *entry; |
45bc131d | 720 | struct strbuf newpath = STRBUF_INIT; |
9047ebbc | 721 | int suffix = 0; |
45bc131d JK |
722 | size_t base_len; |
723 | ||
724 | strbuf_addf(&newpath, "%s~", path); | |
725 | add_flattened_path(&newpath, branch); | |
726 | ||
727 | base_len = newpath.len; | |
fc65b00d KW |
728 | while (hashmap_get_from_hash(&o->current_file_dir_set, |
729 | path_hash(newpath.buf), newpath.buf) || | |
8e1b62f1 | 730 | (!o->call_depth && file_exists(newpath.buf))) { |
45bc131d JK |
731 | strbuf_setlen(&newpath, base_len); |
732 | strbuf_addf(&newpath, "_%d", suffix++); | |
733 | } | |
734 | ||
fc65b00d KW |
735 | FLEX_ALLOC_MEM(entry, path, newpath.buf, newpath.len); |
736 | hashmap_entry_init(entry, path_hash(entry->path)); | |
737 | hashmap_add(&o->current_file_dir_set, entry); | |
45bc131d | 738 | return strbuf_detach(&newpath, NULL); |
9047ebbc MV |
739 | } |
740 | ||
5423d2e7 DT |
741 | /** |
742 | * Check whether a directory in the index is in the way of an incoming | |
743 | * file. Return 1 if so. If check_working_copy is non-zero, also | |
744 | * check the working directory. If empty_ok is non-zero, also return | |
745 | * 0 in the case where the working-tree dir exists but is empty. | |
746 | */ | |
747 | static int dir_in_way(const char *path, int check_working_copy, int empty_ok) | |
f2507b4e | 748 | { |
b4600fbe JK |
749 | int pos; |
750 | struct strbuf dirpath = STRBUF_INIT; | |
f2507b4e EN |
751 | struct stat st; |
752 | ||
b4600fbe JK |
753 | strbuf_addstr(&dirpath, path); |
754 | strbuf_addch(&dirpath, '/'); | |
f2507b4e | 755 | |
b4600fbe | 756 | pos = cache_name_pos(dirpath.buf, dirpath.len); |
f2507b4e EN |
757 | |
758 | if (pos < 0) | |
759 | pos = -1 - pos; | |
760 | if (pos < active_nr && | |
b4600fbe JK |
761 | !strncmp(dirpath.buf, active_cache[pos]->name, dirpath.len)) { |
762 | strbuf_release(&dirpath); | |
f2507b4e EN |
763 | return 1; |
764 | } | |
765 | ||
b4600fbe | 766 | strbuf_release(&dirpath); |
5423d2e7 DT |
767 | return check_working_copy && !lstat(path, &st) && S_ISDIR(st.st_mode) && |
768 | !(empty_ok && is_empty_dir(path)); | |
f2507b4e EN |
769 | } |
770 | ||
aacb82de | 771 | static int was_tracked(const char *path) |
60c91181 JH |
772 | { |
773 | int pos = cache_name_pos(path, strlen(path)); | |
774 | ||
f8d83fb6 JS |
775 | if (0 <= pos) |
776 | /* we have been tracking this path */ | |
777 | return 1; | |
778 | ||
779 | /* | |
780 | * Look for an unmerged entry for the path, | |
781 | * specifically stage #2, which would indicate | |
782 | * that "our" side before the merge started | |
783 | * had the path tracked (and resulted in a conflict). | |
784 | */ | |
785 | for (pos = -1 - pos; | |
786 | pos < active_nr && !strcmp(path, active_cache[pos]->name); | |
787 | pos++) | |
788 | if (ce_stage(active_cache[pos]) == 2) | |
aacb82de | 789 | return 1; |
aacb82de | 790 | return 0; |
60c91181 JH |
791 | } |
792 | ||
aacb82de | 793 | static int would_lose_untracked(const char *path) |
9047ebbc | 794 | { |
aacb82de | 795 | return !was_tracked(path) && file_exists(path); |
60c91181 JH |
796 | } |
797 | ||
ed0148a5 | 798 | static int make_room_for_path(struct merge_options *o, const char *path) |
9047ebbc | 799 | { |
ed0148a5 | 800 | int status, i; |
55653a68 | 801 | const char *msg = _("failed to create path '%s'%s"); |
9047ebbc | 802 | |
ed0148a5 EN |
803 | /* Unlink any D/F conflict files that are in the way */ |
804 | for (i = 0; i < o->df_conflict_file_set.nr; i++) { | |
805 | const char *df_path = o->df_conflict_file_set.items[i].string; | |
806 | size_t pathlen = strlen(path); | |
807 | size_t df_pathlen = strlen(df_path); | |
808 | if (df_pathlen < pathlen && | |
809 | path[df_pathlen] == '/' && | |
810 | strncmp(path, df_path, df_pathlen) == 0) { | |
811 | output(o, 3, | |
55653a68 | 812 | _("Removing %s to make room for subdirectory\n"), |
ed0148a5 EN |
813 | df_path); |
814 | unlink(df_path); | |
815 | unsorted_string_list_delete_item(&o->df_conflict_file_set, | |
816 | i, 0); | |
817 | break; | |
818 | } | |
819 | } | |
820 | ||
821 | /* Make sure leading directories are created */ | |
9047ebbc MV |
822 | status = safe_create_leading_directories_const(path); |
823 | if (status) { | |
6003303a | 824 | if (status == SCLD_EXISTS) |
9047ebbc | 825 | /* something else exists */ |
bc9204d4 JS |
826 | return err(o, msg, path, _(": perhaps a D/F conflict?")); |
827 | return err(o, msg, path, ""); | |
9047ebbc MV |
828 | } |
829 | ||
60c91181 JH |
830 | /* |
831 | * Do not unlink a file in the work tree if we are not | |
832 | * tracking it. | |
833 | */ | |
834 | if (would_lose_untracked(path)) | |
bc9204d4 | 835 | return err(o, _("refusing to lose untracked file at '%s'"), |
60c91181 JH |
836 | path); |
837 | ||
9047ebbc MV |
838 | /* Successful unlink is good.. */ |
839 | if (!unlink(path)) | |
840 | return 0; | |
841 | /* .. and so is no existing file */ | |
842 | if (errno == ENOENT) | |
843 | return 0; | |
844 | /* .. but not some other error (who really cares what?) */ | |
bc9204d4 | 845 | return err(o, msg, path, _(": perhaps a D/F conflict?")); |
9047ebbc MV |
846 | } |
847 | ||
75456f96 JS |
848 | static int update_file_flags(struct merge_options *o, |
849 | const struct object_id *oid, | |
850 | unsigned mode, | |
851 | const char *path, | |
852 | int update_cache, | |
853 | int update_wd) | |
9047ebbc | 854 | { |
6003303a JS |
855 | int ret = 0; |
856 | ||
b7fa51da | 857 | if (o->call_depth) |
9047ebbc MV |
858 | update_wd = 0; |
859 | ||
860 | if (update_wd) { | |
861 | enum object_type type; | |
862 | void *buf; | |
863 | unsigned long size; | |
864 | ||
68d03e4a | 865 | if (S_ISGITLINK(mode)) { |
0c44c943 JH |
866 | /* |
867 | * We may later decide to recursively descend into | |
868 | * the submodule directory and update its index | |
869 | * and/or work tree, but we do not do that now. | |
870 | */ | |
68d03e4a | 871 | update_wd = 0; |
0c44c943 | 872 | goto update_index; |
68d03e4a | 873 | } |
9047ebbc | 874 | |
b4f5aca4 | 875 | buf = read_object_file(oid, &type, &size); |
9047ebbc | 876 | if (!buf) |
bc9204d4 | 877 | return err(o, _("cannot read object %s '%s'"), oid_to_hex(oid), path); |
6003303a | 878 | if (type != OBJ_BLOB) { |
bc9204d4 | 879 | ret = err(o, _("blob expected for %s '%s'"), oid_to_hex(oid), path); |
6003303a JS |
880 | goto free_buf; |
881 | } | |
9047ebbc | 882 | if (S_ISREG(mode)) { |
f285a2d7 | 883 | struct strbuf strbuf = STRBUF_INIT; |
9047ebbc MV |
884 | if (convert_to_working_tree(path, buf, size, &strbuf)) { |
885 | free(buf); | |
886 | size = strbuf.len; | |
887 | buf = strbuf_detach(&strbuf, NULL); | |
888 | } | |
889 | } | |
890 | ||
ed0148a5 | 891 | if (make_room_for_path(o, path) < 0) { |
9047ebbc | 892 | update_wd = 0; |
75456f96 | 893 | goto free_buf; |
9047ebbc MV |
894 | } |
895 | if (S_ISREG(mode) || (!has_symlinks && S_ISLNK(mode))) { | |
896 | int fd; | |
897 | if (mode & 0100) | |
898 | mode = 0777; | |
899 | else | |
900 | mode = 0666; | |
901 | fd = open(path, O_WRONLY | O_TRUNC | O_CREAT, mode); | |
6003303a | 902 | if (fd < 0) { |
bc9204d4 JS |
903 | ret = err(o, _("failed to open '%s': %s"), |
904 | path, strerror(errno)); | |
6003303a JS |
905 | goto free_buf; |
906 | } | |
f633ea2c | 907 | write_in_full(fd, buf, size); |
9047ebbc MV |
908 | close(fd); |
909 | } else if (S_ISLNK(mode)) { | |
910 | char *lnk = xmemdupz(buf, size); | |
911 | safe_create_leading_directories_const(path); | |
912 | unlink(path); | |
304dcf26 | 913 | if (symlink(lnk, path)) |
bc9204d4 JS |
914 | ret = err(o, _("failed to symlink '%s': %s"), |
915 | path, strerror(errno)); | |
9047ebbc MV |
916 | free(lnk); |
917 | } else | |
bc9204d4 JS |
918 | ret = err(o, |
919 | _("do not know what to do with %06o %s '%s'"), | |
920 | mode, oid_to_hex(oid), path); | |
75456f96 | 921 | free_buf: |
9047ebbc MV |
922 | free(buf); |
923 | } | |
924 | update_index: | |
6003303a | 925 | if (!ret && update_cache) |
bc9204d4 | 926 | add_cacheinfo(o, mode, oid, path, 0, update_wd, ADD_CACHE_OK_TO_ADD); |
6003303a | 927 | return ret; |
9047ebbc MV |
928 | } |
929 | ||
75456f96 JS |
930 | static int update_file(struct merge_options *o, |
931 | int clean, | |
932 | const struct object_id *oid, | |
933 | unsigned mode, | |
934 | const char *path) | |
9047ebbc | 935 | { |
75456f96 | 936 | return update_file_flags(o, oid, mode, path, o->call_depth || clean, !o->call_depth); |
9047ebbc MV |
937 | } |
938 | ||
939 | /* Low level file merging, update and removal */ | |
940 | ||
9cba13ca | 941 | struct merge_file_info { |
9b561499 | 942 | struct object_id oid; |
9047ebbc MV |
943 | unsigned mode; |
944 | unsigned clean:1, | |
945 | merge:1; | |
946 | }; | |
947 | ||
b7fa51da MV |
948 | static int merge_3way(struct merge_options *o, |
949 | mmbuffer_t *result_buf, | |
0c059420 EN |
950 | const struct diff_filespec *one, |
951 | const struct diff_filespec *a, | |
952 | const struct diff_filespec *b, | |
9047ebbc MV |
953 | const char *branch1, |
954 | const char *branch2) | |
955 | { | |
956 | mmfile_t orig, src1, src2; | |
712516bc | 957 | struct ll_merge_options ll_opts = {0}; |
4c5868f4 | 958 | char *base_name, *name1, *name2; |
9047ebbc | 959 | int merge_status; |
8cc5b290 | 960 | |
712516bc | 961 | ll_opts.renormalize = o->renormalize; |
58a1ece4 | 962 | ll_opts.xdl_opts = o->xdl_opts; |
712516bc JN |
963 | |
964 | if (o->call_depth) { | |
965 | ll_opts.virtual_ancestor = 1; | |
966 | ll_opts.variant = 0; | |
967 | } else { | |
8cc5b290 AP |
968 | switch (o->recursive_variant) { |
969 | case MERGE_RECURSIVE_OURS: | |
712516bc | 970 | ll_opts.variant = XDL_MERGE_FAVOR_OURS; |
8cc5b290 AP |
971 | break; |
972 | case MERGE_RECURSIVE_THEIRS: | |
712516bc | 973 | ll_opts.variant = XDL_MERGE_FAVOR_THEIRS; |
8cc5b290 AP |
974 | break; |
975 | default: | |
712516bc | 976 | ll_opts.variant = 0; |
8cc5b290 AP |
977 | break; |
978 | } | |
979 | } | |
9047ebbc | 980 | |
4c5868f4 JN |
981 | if (strcmp(a->path, b->path) || |
982 | (o->ancestor != NULL && strcmp(a->path, one->path) != 0)) { | |
983 | base_name = o->ancestor == NULL ? NULL : | |
4e2d094d RJ |
984 | mkpathdup("%s:%s", o->ancestor, one->path); |
985 | name1 = mkpathdup("%s:%s", branch1, a->path); | |
986 | name2 = mkpathdup("%s:%s", branch2, b->path); | |
606475f3 | 987 | } else { |
4c5868f4 | 988 | base_name = o->ancestor == NULL ? NULL : |
4e2d094d RJ |
989 | mkpathdup("%s", o->ancestor); |
990 | name1 = mkpathdup("%s", branch1); | |
991 | name2 = mkpathdup("%s", branch2); | |
606475f3 | 992 | } |
9047ebbc | 993 | |
d449347d | 994 | read_mmblob(&orig, &one->oid); |
995 | read_mmblob(&src1, &a->oid); | |
996 | read_mmblob(&src2, &b->oid); | |
9047ebbc | 997 | |
4c5868f4 | 998 | merge_status = ll_merge(result_buf, a->path, &orig, base_name, |
712516bc | 999 | &src1, name1, &src2, name2, &ll_opts); |
9047ebbc | 1000 | |
4e2d094d | 1001 | free(base_name); |
9047ebbc MV |
1002 | free(name1); |
1003 | free(name2); | |
1004 | free(orig.ptr); | |
1005 | free(src1.ptr); | |
1006 | free(src2.ptr); | |
1007 | return merge_status; | |
1008 | } | |
1009 | ||
3c8a51e8 | 1010 | static int merge_file_1(struct merge_options *o, |
6bdaead1 EN |
1011 | const struct diff_filespec *one, |
1012 | const struct diff_filespec *a, | |
1013 | const struct diff_filespec *b, | |
1014 | const char *branch1, | |
3c8a51e8 JS |
1015 | const char *branch2, |
1016 | struct merge_file_info *result) | |
9047ebbc | 1017 | { |
3c8a51e8 JS |
1018 | result->merge = 0; |
1019 | result->clean = 1; | |
9047ebbc MV |
1020 | |
1021 | if ((S_IFMT & a->mode) != (S_IFMT & b->mode)) { | |
3c8a51e8 | 1022 | result->clean = 0; |
9047ebbc | 1023 | if (S_ISREG(a->mode)) { |
3c8a51e8 JS |
1024 | result->mode = a->mode; |
1025 | oidcpy(&result->oid, &a->oid); | |
9047ebbc | 1026 | } else { |
3c8a51e8 JS |
1027 | result->mode = b->mode; |
1028 | oidcpy(&result->oid, &b->oid); | |
9047ebbc MV |
1029 | } |
1030 | } else { | |
b4da9d62 | 1031 | if (!oid_eq(&a->oid, &one->oid) && !oid_eq(&b->oid, &one->oid)) |
3c8a51e8 | 1032 | result->merge = 1; |
9047ebbc MV |
1033 | |
1034 | /* | |
1035 | * Merge modes | |
1036 | */ | |
b7fa51da | 1037 | if (a->mode == b->mode || a->mode == one->mode) |
3c8a51e8 | 1038 | result->mode = b->mode; |
9047ebbc | 1039 | else { |
3c8a51e8 | 1040 | result->mode = a->mode; |
b7fa51da | 1041 | if (b->mode != one->mode) { |
3c8a51e8 JS |
1042 | result->clean = 0; |
1043 | result->merge = 1; | |
9047ebbc MV |
1044 | } |
1045 | } | |
1046 | ||
b4da9d62 | 1047 | if (oid_eq(&a->oid, &b->oid) || oid_eq(&a->oid, &one->oid)) |
3c8a51e8 | 1048 | oidcpy(&result->oid, &b->oid); |
b4da9d62 | 1049 | else if (oid_eq(&b->oid, &one->oid)) |
3c8a51e8 | 1050 | oidcpy(&result->oid, &a->oid); |
9047ebbc MV |
1051 | else if (S_ISREG(a->mode)) { |
1052 | mmbuffer_t result_buf; | |
6003303a | 1053 | int ret = 0, merge_status; |
9047ebbc | 1054 | |
b7fa51da | 1055 | merge_status = merge_3way(o, &result_buf, one, a, b, |
9047ebbc MV |
1056 | branch1, branch2); |
1057 | ||
1058 | if ((merge_status < 0) || !result_buf.ptr) | |
bc9204d4 | 1059 | ret = err(o, _("Failed to execute internal merge")); |
9047ebbc | 1060 | |
a09c985e PO |
1061 | if (!ret && |
1062 | write_object_file(result_buf.ptr, result_buf.size, | |
1063 | blob_type, &result->oid)) | |
bc9204d4 JS |
1064 | ret = err(o, _("Unable to add %s to database"), |
1065 | a->path); | |
9047ebbc MV |
1066 | |
1067 | free(result_buf.ptr); | |
6003303a JS |
1068 | if (ret) |
1069 | return ret; | |
3c8a51e8 | 1070 | result->clean = (merge_status == 0); |
9047ebbc | 1071 | } else if (S_ISGITLINK(a->mode)) { |
71f35d5c | 1072 | result->clean = merge_submodule(&result->oid, |
a0d12c44 | 1073 | one->path, |
71f35d5c | 1074 | &one->oid, |
1075 | &a->oid, | |
1076 | &b->oid, | |
80988783 | 1077 | !o->call_depth); |
9047ebbc | 1078 | } else if (S_ISLNK(a->mode)) { |
fd48b464 JH |
1079 | switch (o->recursive_variant) { |
1080 | case MERGE_RECURSIVE_NORMAL: | |
1081 | oidcpy(&result->oid, &a->oid); | |
1082 | if (!oid_eq(&a->oid, &b->oid)) | |
1083 | result->clean = 0; | |
1084 | break; | |
1085 | case MERGE_RECURSIVE_OURS: | |
1086 | oidcpy(&result->oid, &a->oid); | |
1087 | break; | |
1088 | case MERGE_RECURSIVE_THEIRS: | |
1089 | oidcpy(&result->oid, &b->oid); | |
1090 | break; | |
1091 | } | |
ef1177d1 | 1092 | } else |
7e97e100 | 1093 | die("BUG: unsupported object type in the tree"); |
9047ebbc MV |
1094 | } |
1095 | ||
3c8a51e8 | 1096 | return 0; |
9047ebbc MV |
1097 | } |
1098 | ||
3c8a51e8 | 1099 | static int merge_file_special_markers(struct merge_options *o, |
dac47415 EN |
1100 | const struct diff_filespec *one, |
1101 | const struct diff_filespec *a, | |
1102 | const struct diff_filespec *b, | |
1103 | const char *branch1, | |
1104 | const char *filename1, | |
1105 | const char *branch2, | |
3c8a51e8 JS |
1106 | const char *filename2, |
1107 | struct merge_file_info *mfi) | |
dac47415 EN |
1108 | { |
1109 | char *side1 = NULL; | |
1110 | char *side2 = NULL; | |
3c8a51e8 | 1111 | int ret; |
dac47415 | 1112 | |
28310186 JK |
1113 | if (filename1) |
1114 | side1 = xstrfmt("%s:%s", branch1, filename1); | |
1115 | if (filename2) | |
1116 | side2 = xstrfmt("%s:%s", branch2, filename2); | |
dac47415 | 1117 | |
3c8a51e8 JS |
1118 | ret = merge_file_1(o, one, a, b, |
1119 | side1 ? side1 : branch1, | |
1120 | side2 ? side2 : branch2, mfi); | |
dac47415 EN |
1121 | free(side1); |
1122 | free(side2); | |
3c8a51e8 | 1123 | return ret; |
dac47415 EN |
1124 | } |
1125 | ||
3c8a51e8 | 1126 | static int merge_file_one(struct merge_options *o, |
6bdaead1 | 1127 | const char *path, |
b4da9d62 | 1128 | const struct object_id *o_oid, int o_mode, |
1129 | const struct object_id *a_oid, int a_mode, | |
1130 | const struct object_id *b_oid, int b_mode, | |
6bdaead1 | 1131 | const char *branch1, |
3c8a51e8 JS |
1132 | const char *branch2, |
1133 | struct merge_file_info *mfi) | |
6bdaead1 EN |
1134 | { |
1135 | struct diff_filespec one, a, b; | |
1136 | ||
1137 | one.path = a.path = b.path = (char *)path; | |
b4da9d62 | 1138 | oidcpy(&one.oid, o_oid); |
6bdaead1 | 1139 | one.mode = o_mode; |
b4da9d62 | 1140 | oidcpy(&a.oid, a_oid); |
6bdaead1 | 1141 | a.mode = a_mode; |
b4da9d62 | 1142 | oidcpy(&b.oid, b_oid); |
6bdaead1 | 1143 | b.mode = b_mode; |
3c8a51e8 | 1144 | return merge_file_1(o, &one, &a, &b, branch1, branch2, mfi); |
6bdaead1 EN |
1145 | } |
1146 | ||
9c0743fe EN |
1147 | static int conflict_rename_dir(struct merge_options *o, |
1148 | struct diff_filepair *pair, | |
1149 | const char *rename_branch, | |
1150 | const char *other_branch) | |
1151 | { | |
1152 | const struct diff_filespec *dest = pair->two; | |
1153 | ||
1154 | if (update_file(o, 1, &dest->oid, dest->mode, dest->path)) | |
1155 | return -1; | |
1156 | return 0; | |
1157 | } | |
1158 | ||
75456f96 | 1159 | static int handle_change_delete(struct merge_options *o, |
b26d87f2 | 1160 | const char *path, const char *old_path, |
b4da9d62 | 1161 | const struct object_id *o_oid, int o_mode, |
b26d87f2 MM |
1162 | const struct object_id *changed_oid, |
1163 | int changed_mode, | |
1164 | const char *change_branch, | |
1165 | const char *delete_branch, | |
b7033252 EN |
1166 | const char *change, const char *change_past) |
1167 | { | |
b26d87f2 MM |
1168 | char *alt_path = NULL; |
1169 | const char *update_path = path; | |
75456f96 | 1170 | int ret = 0; |
b26d87f2 | 1171 | |
8b026eda | 1172 | if (dir_in_way(path, !o->call_depth, 0)) { |
b26d87f2 | 1173 | update_path = alt_path = unique_path(o, path, change_branch); |
b7033252 EN |
1174 | } |
1175 | ||
1176 | if (o->call_depth) { | |
1177 | /* | |
1178 | * We cannot arbitrarily accept either a_sha or b_sha as | |
1179 | * correct; since there is no true "middle point" between | |
1180 | * them, simply reuse the base version for virtual merge base. | |
1181 | */ | |
75456f96 JS |
1182 | ret = remove_file_from_cache(path); |
1183 | if (!ret) | |
b26d87f2 | 1184 | ret = update_file(o, 0, o_oid, o_mode, update_path); |
b7033252 | 1185 | } else { |
b26d87f2 MM |
1186 | if (!alt_path) { |
1187 | if (!old_path) { | |
1188 | output(o, 1, _("CONFLICT (%s/delete): %s deleted in %s " | |
1189 | "and %s in %s. Version %s of %s left in tree."), | |
1190 | change, path, delete_branch, change_past, | |
1191 | change_branch, change_branch, path); | |
1192 | } else { | |
1193 | output(o, 1, _("CONFLICT (%s/delete): %s deleted in %s " | |
1194 | "and %s to %s in %s. Version %s of %s left in tree."), | |
1195 | change, old_path, delete_branch, change_past, path, | |
1196 | change_branch, change_branch, path); | |
1197 | } | |
55653a68 | 1198 | } else { |
b26d87f2 MM |
1199 | if (!old_path) { |
1200 | output(o, 1, _("CONFLICT (%s/delete): %s deleted in %s " | |
1201 | "and %s in %s. Version %s of %s left in tree at %s."), | |
1202 | change, path, delete_branch, change_past, | |
1203 | change_branch, change_branch, path, alt_path); | |
1204 | } else { | |
1205 | output(o, 1, _("CONFLICT (%s/delete): %s deleted in %s " | |
1206 | "and %s to %s in %s. Version %s of %s left in tree at %s."), | |
1207 | change, old_path, delete_branch, change_past, path, | |
1208 | change_branch, change_branch, path, alt_path); | |
1209 | } | |
55653a68 | 1210 | } |
35a74abf | 1211 | /* |
b26d87f2 MM |
1212 | * No need to call update_file() on path when change_branch == |
1213 | * o->branch1 && !alt_path, since that would needlessly touch | |
1214 | * path. We could call update_file_flags() with update_cache=0 | |
1215 | * and update_wd=0, but that's a no-op. | |
35a74abf | 1216 | */ |
b26d87f2 MM |
1217 | if (change_branch != o->branch1 || alt_path) |
1218 | ret = update_file(o, 0, changed_oid, changed_mode, update_path); | |
b7033252 | 1219 | } |
b26d87f2 | 1220 | free(alt_path); |
75456f96 JS |
1221 | |
1222 | return ret; | |
b7033252 EN |
1223 | } |
1224 | ||
75456f96 | 1225 | static int conflict_rename_delete(struct merge_options *o, |
6ef2cb00 EN |
1226 | struct diff_filepair *pair, |
1227 | const char *rename_branch, | |
b26d87f2 | 1228 | const char *delete_branch) |
9047ebbc | 1229 | { |
e03acb8b EN |
1230 | const struct diff_filespec *orig = pair->one; |
1231 | const struct diff_filespec *dest = pair->two; | |
6ef2cb00 | 1232 | |
75456f96 JS |
1233 | if (handle_change_delete(o, |
1234 | o->call_depth ? orig->path : dest->path, | |
b26d87f2 | 1235 | o->call_depth ? NULL : orig->path, |
75456f96 | 1236 | &orig->oid, orig->mode, |
b26d87f2 MM |
1237 | &dest->oid, dest->mode, |
1238 | rename_branch, delete_branch, | |
75456f96 JS |
1239 | _("rename"), _("renamed"))) |
1240 | return -1; | |
e03acb8b | 1241 | |
75456f96 JS |
1242 | if (o->call_depth) |
1243 | return remove_file_from_cache(dest->path); | |
1244 | else | |
bc9204d4 | 1245 | return update_stages(o, dest->path, NULL, |
75456f96 JS |
1246 | rename_branch == o->branch1 ? dest : NULL, |
1247 | rename_branch == o->branch1 ? NULL : dest); | |
6ef2cb00 EN |
1248 | } |
1249 | ||
1ac91b32 EN |
1250 | static struct diff_filespec *filespec_from_entry(struct diff_filespec *target, |
1251 | struct stage_data *entry, | |
1252 | int stage) | |
9047ebbc | 1253 | { |
b4da9d62 | 1254 | struct object_id *oid = &entry->stages[stage].oid; |
1ac91b32 | 1255 | unsigned mode = entry->stages[stage].mode; |
b4da9d62 | 1256 | if (mode == 0 || is_null_oid(oid)) |
1ac91b32 | 1257 | return NULL; |
b4da9d62 | 1258 | oidcpy(&target->oid, oid); |
1ac91b32 EN |
1259 | target->mode = mode; |
1260 | return target; | |
1261 | } | |
1262 | ||
75456f96 | 1263 | static int handle_file(struct merge_options *o, |
3672c971 EN |
1264 | struct diff_filespec *rename, |
1265 | int stage, | |
1266 | struct rename_conflict_info *ci) | |
1267 | { | |
1268 | char *dst_name = rename->path; | |
1269 | struct stage_data *dst_entry; | |
1270 | const char *cur_branch, *other_branch; | |
1271 | struct diff_filespec other; | |
1272 | struct diff_filespec *add; | |
75456f96 | 1273 | int ret; |
3672c971 EN |
1274 | |
1275 | if (stage == 2) { | |
1276 | dst_entry = ci->dst_entry1; | |
1277 | cur_branch = ci->branch1; | |
1278 | other_branch = ci->branch2; | |
1279 | } else { | |
1280 | dst_entry = ci->dst_entry2; | |
1281 | cur_branch = ci->branch2; | |
1282 | other_branch = ci->branch1; | |
9047ebbc | 1283 | } |
3672c971 EN |
1284 | |
1285 | add = filespec_from_entry(&other, dst_entry, stage ^ 1); | |
3672c971 EN |
1286 | if (add) { |
1287 | char *add_name = unique_path(o, rename->path, other_branch); | |
75456f96 JS |
1288 | if (update_file(o, 0, &add->oid, add->mode, add_name)) |
1289 | return -1; | |
3672c971 | 1290 | |
8b026eda | 1291 | remove_file(o, 0, rename->path, 0); |
3672c971 EN |
1292 | dst_name = unique_path(o, rename->path, cur_branch); |
1293 | } else { | |
5423d2e7 | 1294 | if (dir_in_way(rename->path, !o->call_depth, 0)) { |
3672c971 | 1295 | dst_name = unique_path(o, rename->path, cur_branch); |
55653a68 | 1296 | output(o, 1, _("%s is a directory in %s adding as %s instead"), |
3672c971 EN |
1297 | rename->path, other_branch, dst_name); |
1298 | } | |
9047ebbc | 1299 | } |
75456f96 JS |
1300 | if ((ret = update_file(o, 0, &rename->oid, rename->mode, dst_name))) |
1301 | ; /* fall through, do allow dst_name to be released */ | |
1302 | else if (stage == 2) | |
bc9204d4 | 1303 | ret = update_stages(o, rename->path, NULL, rename, add); |
f53d3977 | 1304 | else |
bc9204d4 | 1305 | ret = update_stages(o, rename->path, NULL, add, rename); |
3672c971 EN |
1306 | |
1307 | if (dst_name != rename->path) | |
1308 | free(dst_name); | |
75456f96 JS |
1309 | |
1310 | return ret; | |
3672c971 EN |
1311 | } |
1312 | ||
75456f96 | 1313 | static int conflict_rename_rename_1to2(struct merge_options *o, |
a99b7f22 | 1314 | struct rename_conflict_info *ci) |
9047ebbc | 1315 | { |
09c01f85 | 1316 | /* One file was renamed in both branches, but to different names. */ |
a99b7f22 EN |
1317 | struct diff_filespec *one = ci->pair1->one; |
1318 | struct diff_filespec *a = ci->pair1->two; | |
1319 | struct diff_filespec *b = ci->pair2->two; | |
4f66dade | 1320 | |
55653a68 | 1321 | output(o, 1, _("CONFLICT (rename/rename): " |
4f66dade | 1322 | "Rename \"%s\"->\"%s\" in branch \"%s\" " |
55653a68 | 1323 | "rename \"%s\"->\"%s\" in \"%s\"%s"), |
a99b7f22 EN |
1324 | one->path, a->path, ci->branch1, |
1325 | one->path, b->path, ci->branch2, | |
55653a68 | 1326 | o->call_depth ? _(" (left unresolved)") : ""); |
b7fa51da | 1327 | if (o->call_depth) { |
c52ff85d | 1328 | struct merge_file_info mfi; |
6d63070c EN |
1329 | struct diff_filespec other; |
1330 | struct diff_filespec *add; | |
3c8a51e8 | 1331 | if (merge_file_one(o, one->path, |
b4da9d62 | 1332 | &one->oid, one->mode, |
1333 | &a->oid, a->mode, | |
1334 | &b->oid, b->mode, | |
3c8a51e8 | 1335 | ci->branch1, ci->branch2, &mfi)) |
75456f96 JS |
1336 | return -1; |
1337 | ||
9047ebbc | 1338 | /* |
c52ff85d EN |
1339 | * FIXME: For rename/add-source conflicts (if we could detect |
1340 | * such), this is wrong. We should instead find a unique | |
1341 | * pathname and then either rename the add-source file to that | |
1342 | * unique path, or use that unique path instead of src here. | |
9047ebbc | 1343 | */ |
75456f96 JS |
1344 | if (update_file(o, 0, &mfi.oid, mfi.mode, one->path)) |
1345 | return -1; | |
07413c5a | 1346 | |
6d63070c EN |
1347 | /* |
1348 | * Above, we put the merged content at the merge-base's | |
1349 | * path. Now we usually need to delete both a->path and | |
1350 | * b->path. However, the rename on each side of the merge | |
1351 | * could also be involved in a rename/add conflict. In | |
1352 | * such cases, we should keep the added file around, | |
1353 | * resolving the conflict at that path in its favor. | |
1354 | */ | |
1355 | add = filespec_from_entry(&other, ci->dst_entry1, 2 ^ 1); | |
75456f96 JS |
1356 | if (add) { |
1357 | if (update_file(o, 0, &add->oid, add->mode, a->path)) | |
1358 | return -1; | |
1359 | } | |
6d63070c EN |
1360 | else |
1361 | remove_file_from_cache(a->path); | |
1362 | add = filespec_from_entry(&other, ci->dst_entry2, 3 ^ 1); | |
75456f96 JS |
1363 | if (add) { |
1364 | if (update_file(o, 0, &add->oid, add->mode, b->path)) | |
1365 | return -1; | |
1366 | } | |
6d63070c EN |
1367 | else |
1368 | remove_file_from_cache(b->path); | |
75456f96 JS |
1369 | } else if (handle_file(o, a, 2, ci) || handle_file(o, b, 3, ci)) |
1370 | return -1; | |
1371 | ||
1372 | return 0; | |
9047ebbc MV |
1373 | } |
1374 | ||
75456f96 | 1375 | static int conflict_rename_rename_2to1(struct merge_options *o, |
461f5041 | 1376 | struct rename_conflict_info *ci) |
9047ebbc | 1377 | { |
461f5041 EN |
1378 | /* Two files, a & b, were renamed to the same thing, c. */ |
1379 | struct diff_filespec *a = ci->pair1->one; | |
1380 | struct diff_filespec *b = ci->pair2->one; | |
1381 | struct diff_filespec *c1 = ci->pair1->two; | |
1382 | struct diff_filespec *c2 = ci->pair2->two; | |
1383 | char *path = c1->path; /* == c2->path */ | |
434b8525 EN |
1384 | struct merge_file_info mfi_c1; |
1385 | struct merge_file_info mfi_c2; | |
75456f96 | 1386 | int ret; |
461f5041 | 1387 | |
55653a68 | 1388 | output(o, 1, _("CONFLICT (rename/rename): " |
461f5041 | 1389 | "Rename %s->%s in %s. " |
55653a68 | 1390 | "Rename %s->%s in %s"), |
461f5041 EN |
1391 | a->path, c1->path, ci->branch1, |
1392 | b->path, c2->path, ci->branch2); | |
1393 | ||
8e1b62f1 EN |
1394 | remove_file(o, 1, a->path, o->call_depth || would_lose_untracked(a->path)); |
1395 | remove_file(o, 1, b->path, o->call_depth || would_lose_untracked(b->path)); | |
461f5041 | 1396 | |
3c8a51e8 JS |
1397 | if (merge_file_special_markers(o, a, c1, &ci->ren1_other, |
1398 | o->branch1, c1->path, | |
1399 | o->branch2, ci->ren1_other.path, &mfi_c1) || | |
1400 | merge_file_special_markers(o, b, &ci->ren2_other, c2, | |
1401 | o->branch1, ci->ren2_other.path, | |
1402 | o->branch2, c2->path, &mfi_c2)) | |
75456f96 | 1403 | return -1; |
434b8525 | 1404 | |
0a6b8712 | 1405 | if (o->call_depth) { |
434b8525 EN |
1406 | /* |
1407 | * If mfi_c1.clean && mfi_c2.clean, then it might make | |
1408 | * sense to do a two-way merge of those results. But, I | |
1409 | * think in all cases, it makes sense to have the virtual | |
1410 | * merge base just undo the renames; they can be detected | |
1411 | * again later for the non-recursive merge. | |
1412 | */ | |
1413 | remove_file(o, 0, path, 0); | |
75456f96 JS |
1414 | ret = update_file(o, 0, &mfi_c1.oid, mfi_c1.mode, a->path); |
1415 | if (!ret) | |
1416 | ret = update_file(o, 0, &mfi_c2.oid, mfi_c2.mode, | |
1417 | b->path); | |
0a6b8712 | 1418 | } else { |
461f5041 EN |
1419 | char *new_path1 = unique_path(o, path, ci->branch1); |
1420 | char *new_path2 = unique_path(o, path, ci->branch2); | |
55653a68 | 1421 | output(o, 1, _("Renaming %s to %s and %s to %s instead"), |
461f5041 | 1422 | a->path, new_path1, b->path, new_path2); |
8b026eda | 1423 | remove_file(o, 0, path, 0); |
75456f96 JS |
1424 | ret = update_file(o, 0, &mfi_c1.oid, mfi_c1.mode, new_path1); |
1425 | if (!ret) | |
1426 | ret = update_file(o, 0, &mfi_c2.oid, mfi_c2.mode, | |
1427 | new_path2); | |
9c0743fe EN |
1428 | /* |
1429 | * unpack_trees() actually populates the index for us for | |
1430 | * "normal" rename/rename(2to1) situtations so that the | |
1431 | * correct entries are at the higher stages, which would | |
1432 | * make the call below to update_stages_for_stage_data | |
1433 | * unnecessary. However, if either of the renames came | |
1434 | * from a directory rename, then unpack_trees() will not | |
1435 | * have gotten the right data loaded into the index, so we | |
1436 | * need to do so now. (While it'd be tempting to move this | |
1437 | * call to update_stages_for_stage_data() to | |
1438 | * apply_directory_rename_modifications(), that would break | |
1439 | * our intermediate calls to would_lose_untracked() since | |
1440 | * those rely on the current in-memory index. See also the | |
1441 | * big "NOTE" in update_stages()). | |
1442 | */ | |
1443 | if (update_stages_for_stage_data(o, path, ci->dst_entry1)) | |
1444 | ret = -1; | |
1445 | ||
0a6b8712 EN |
1446 | free(new_path2); |
1447 | free(new_path1); | |
1448 | } | |
75456f96 JS |
1449 | |
1450 | return ret; | |
9047ebbc MV |
1451 | } |
1452 | ||
9ba91557 | 1453 | /* |
e5257b2a | 1454 | * Get the diff_filepairs changed between o_tree and tree. |
9ba91557 | 1455 | */ |
e5257b2a EN |
1456 | static struct diff_queue_struct *get_diffpairs(struct merge_options *o, |
1457 | struct tree *o_tree, | |
1458 | struct tree *tree) | |
9ba91557 | 1459 | { |
e5257b2a | 1460 | struct diff_queue_struct *ret; |
9ba91557 EN |
1461 | struct diff_options opts; |
1462 | ||
9ba91557 EN |
1463 | diff_setup(&opts); |
1464 | opts.flags.recursive = 1; | |
1465 | opts.flags.rename_empty = 0; | |
1466 | opts.detect_rename = DIFF_DETECT_RENAME; | |
1467 | opts.rename_limit = o->merge_rename_limit >= 0 ? o->merge_rename_limit : | |
1468 | o->diff_rename_limit >= 0 ? o->diff_rename_limit : | |
1469 | 1000; | |
1470 | opts.rename_score = o->rename_score; | |
1471 | opts.show_rename_progress = o->show_rename_progress; | |
1472 | opts.output_format = DIFF_FORMAT_NO_OUTPUT; | |
1473 | diff_setup_done(&opts); | |
1474 | diff_tree_oid(&o_tree->object.oid, &tree->object.oid, "", &opts); | |
1475 | diffcore_std(&opts); | |
1476 | if (opts.needed_rename_limit > o->needed_rename_limit) | |
1477 | o->needed_rename_limit = opts.needed_rename_limit; | |
e5257b2a EN |
1478 | |
1479 | ret = xmalloc(sizeof(*ret)); | |
1480 | *ret = diff_queued_diff; | |
1481 | ||
1482 | opts.output_format = DIFF_FORMAT_NO_OUTPUT; | |
1483 | diff_queued_diff.nr = 0; | |
1484 | diff_queued_diff.queue = NULL; | |
1485 | diff_flush(&opts); | |
1486 | return ret; | |
1487 | } | |
1488 | ||
96e7ffbd EN |
1489 | static int tree_has_path(struct tree *tree, const char *path) |
1490 | { | |
1491 | struct object_id hashy; | |
1492 | unsigned int mode_o; | |
1493 | ||
1494 | return !get_tree_entry(&tree->object.oid, path, | |
1495 | &hashy, &mode_o); | |
1496 | } | |
1497 | ||
e95ab70a EN |
1498 | /* |
1499 | * Return a new string that replaces the beginning portion (which matches | |
1500 | * entry->dir), with entry->new_dir. In perl-speak: | |
1501 | * new_path_name = (old_path =~ s/entry->dir/entry->new_dir/); | |
1502 | * NOTE: | |
1503 | * Caller must ensure that old_path starts with entry->dir + '/'. | |
1504 | */ | |
1505 | static char *apply_dir_rename(struct dir_rename_entry *entry, | |
1506 | const char *old_path) | |
1507 | { | |
1508 | struct strbuf new_path = STRBUF_INIT; | |
1509 | int oldlen, newlen; | |
1510 | ||
1511 | if (entry->non_unique_new_dir) | |
1512 | return NULL; | |
1513 | ||
1514 | oldlen = strlen(entry->dir); | |
1515 | newlen = entry->new_dir.len + (strlen(old_path) - oldlen) + 1; | |
1516 | strbuf_grow(&new_path, newlen); | |
1517 | strbuf_addbuf(&new_path, &entry->new_dir); | |
1518 | strbuf_addstr(&new_path, &old_path[oldlen]); | |
1519 | ||
1520 | return strbuf_detach(&new_path, NULL); | |
1521 | } | |
1522 | ||
7fe40b88 EN |
1523 | static void get_renamed_dir_portion(const char *old_path, const char *new_path, |
1524 | char **old_dir, char **new_dir) | |
1525 | { | |
1526 | char *end_of_old, *end_of_new; | |
1527 | int old_len, new_len; | |
1528 | ||
1529 | *old_dir = NULL; | |
1530 | *new_dir = NULL; | |
1531 | ||
1532 | /* | |
1533 | * For | |
1534 | * "a/b/c/d/e/foo.c" -> "a/b/some/thing/else/e/foo.c" | |
1535 | * the "e/foo.c" part is the same, we just want to know that | |
1536 | * "a/b/c/d" was renamed to "a/b/some/thing/else" | |
1537 | * so, for this example, this function returns "a/b/c/d" in | |
1538 | * *old_dir and "a/b/some/thing/else" in *new_dir. | |
1539 | * | |
1540 | * Also, if the basename of the file changed, we don't care. We | |
1541 | * want to know which portion of the directory, if any, changed. | |
1542 | */ | |
1543 | end_of_old = strrchr(old_path, '/'); | |
1544 | end_of_new = strrchr(new_path, '/'); | |
1545 | ||
1546 | if (end_of_old == NULL || end_of_new == NULL) | |
1547 | return; | |
1548 | while (*--end_of_new == *--end_of_old && | |
1549 | end_of_old != old_path && | |
1550 | end_of_new != new_path) | |
1551 | ; /* Do nothing; all in the while loop */ | |
1552 | /* | |
1553 | * We've found the first non-matching character in the directory | |
1554 | * paths. That means the current directory we were comparing | |
1555 | * represents the rename. Move end_of_old and end_of_new back | |
1556 | * to the full directory name. | |
1557 | */ | |
1558 | if (*end_of_old == '/') | |
1559 | end_of_old++; | |
1560 | if (*end_of_old != '/') | |
1561 | end_of_new++; | |
1562 | end_of_old = strchr(end_of_old, '/'); | |
1563 | end_of_new = strchr(end_of_new, '/'); | |
1564 | ||
1565 | /* | |
1566 | * It may have been the case that old_path and new_path were the same | |
1567 | * directory all along. Don't claim a rename if they're the same. | |
1568 | */ | |
1569 | old_len = end_of_old - old_path; | |
1570 | new_len = end_of_new - new_path; | |
1571 | ||
1572 | if (old_len != new_len || strncmp(old_path, new_path, old_len)) { | |
1573 | *old_dir = xstrndup(old_path, old_len); | |
1574 | *new_dir = xstrndup(new_path, new_len); | |
1575 | } | |
1576 | } | |
1577 | ||
96e7ffbd EN |
1578 | static void remove_hashmap_entries(struct hashmap *dir_renames, |
1579 | struct string_list *items_to_remove) | |
1580 | { | |
1581 | int i; | |
1582 | struct dir_rename_entry *entry; | |
1583 | ||
1584 | for (i = 0; i < items_to_remove->nr; i++) { | |
1585 | entry = items_to_remove->items[i].util; | |
1586 | hashmap_remove(dir_renames, entry, NULL); | |
1587 | } | |
1588 | string_list_clear(items_to_remove, 0); | |
1589 | } | |
1590 | ||
f6f77559 EN |
1591 | /* |
1592 | * See if there is a directory rename for path, and if there are any file | |
1593 | * level conflicts for the renamed location. If there is a rename and | |
1594 | * there are no conflicts, return the new name. Otherwise, return NULL. | |
1595 | */ | |
1596 | static char *handle_path_level_conflicts(struct merge_options *o, | |
1597 | const char *path, | |
1598 | struct dir_rename_entry *entry, | |
1599 | struct hashmap *collisions, | |
1600 | struct tree *tree) | |
1601 | { | |
1602 | char *new_path = NULL; | |
1603 | struct collision_entry *collision_ent; | |
1604 | int clean = 1; | |
1605 | struct strbuf collision_paths = STRBUF_INIT; | |
1606 | ||
1607 | /* | |
1608 | * entry has the mapping of old directory name to new directory name | |
1609 | * that we want to apply to path. | |
1610 | */ | |
1611 | new_path = apply_dir_rename(entry, path); | |
1612 | ||
1613 | if (!new_path) { | |
1614 | /* This should only happen when entry->non_unique_new_dir set */ | |
1615 | if (!entry->non_unique_new_dir) | |
1616 | BUG("entry->non_unqiue_dir not set and !new_path"); | |
1617 | output(o, 1, _("CONFLICT (directory rename split): " | |
1618 | "Unclear where to place %s because directory " | |
1619 | "%s was renamed to multiple other directories, " | |
1620 | "with no destination getting a majority of the " | |
1621 | "files."), | |
1622 | path, entry->dir); | |
1623 | clean = 0; | |
1624 | return NULL; | |
1625 | } | |
1626 | ||
1627 | /* | |
1628 | * The caller needs to have ensured that it has pre-populated | |
1629 | * collisions with all paths that map to new_path. Do a quick check | |
1630 | * to ensure that's the case. | |
1631 | */ | |
1632 | collision_ent = collision_find_entry(collisions, new_path); | |
1633 | if (collision_ent == NULL) | |
1634 | BUG("collision_ent is NULL"); | |
1635 | ||
1636 | /* | |
1637 | * Check for one-sided add/add/.../add conflicts, i.e. | |
1638 | * where implicit renames from the other side doing | |
1639 | * directory rename(s) can affect this side of history | |
1640 | * to put multiple paths into the same location. Warn | |
1641 | * and bail on directory renames for such paths. | |
1642 | */ | |
1643 | if (collision_ent->reported_already) { | |
1644 | clean = 0; | |
1645 | } else if (tree_has_path(tree, new_path)) { | |
1646 | collision_ent->reported_already = 1; | |
1647 | strbuf_add_separated_string_list(&collision_paths, ", ", | |
1648 | &collision_ent->source_files); | |
1649 | output(o, 1, _("CONFLICT (implicit dir rename): Existing " | |
1650 | "file/dir at %s in the way of implicit " | |
1651 | "directory rename(s) putting the following " | |
1652 | "path(s) there: %s."), | |
1653 | new_path, collision_paths.buf); | |
1654 | clean = 0; | |
1655 | } else if (collision_ent->source_files.nr > 1) { | |
1656 | collision_ent->reported_already = 1; | |
1657 | strbuf_add_separated_string_list(&collision_paths, ", ", | |
1658 | &collision_ent->source_files); | |
1659 | output(o, 1, _("CONFLICT (implicit dir rename): Cannot map " | |
1660 | "more than one path to %s; implicit directory " | |
1661 | "renames tried to put these paths there: %s"), | |
1662 | new_path, collision_paths.buf); | |
1663 | clean = 0; | |
1664 | } | |
1665 | ||
1666 | /* Free memory we no longer need */ | |
1667 | strbuf_release(&collision_paths); | |
1668 | if (!clean && new_path) { | |
1669 | free(new_path); | |
1670 | return NULL; | |
1671 | } | |
1672 | ||
1673 | return new_path; | |
1674 | } | |
1675 | ||
96e7ffbd EN |
1676 | /* |
1677 | * There are a couple things we want to do at the directory level: | |
1678 | * 1. Check for both sides renaming to the same thing, in order to avoid | |
1679 | * implicit renaming of files that should be left in place. (See | |
1680 | * testcase 6b in t6043 for details.) | |
1681 | * 2. Prune directory renames if there are still files left in the | |
1682 | * the original directory. These represent a partial directory rename, | |
1683 | * i.e. a rename where only some of the files within the directory | |
1684 | * were renamed elsewhere. (Technically, this could be done earlier | |
1685 | * in get_directory_renames(), except that would prevent us from | |
1686 | * doing the previous check and thus failing testcase 6b.) | |
1687 | * 3. Check for rename/rename(1to2) conflicts (at the directory level). | |
1688 | * In the future, we could potentially record this info as well and | |
1689 | * omit reporting rename/rename(1to2) conflicts for each path within | |
1690 | * the affected directories, thus cleaning up the merge output. | |
1691 | * NOTE: We do NOT check for rename/rename(2to1) conflicts at the | |
1692 | * directory level, because merging directories is fine. If it | |
1693 | * causes conflicts for files within those merged directories, then | |
1694 | * that should be detected at the individual path level. | |
1695 | */ | |
1696 | static void handle_directory_level_conflicts(struct merge_options *o, | |
1697 | struct hashmap *dir_re_head, | |
1698 | struct tree *head, | |
1699 | struct hashmap *dir_re_merge, | |
1700 | struct tree *merge) | |
1701 | { | |
1702 | struct hashmap_iter iter; | |
1703 | struct dir_rename_entry *head_ent; | |
1704 | struct dir_rename_entry *merge_ent; | |
1705 | ||
1706 | struct string_list remove_from_head = STRING_LIST_INIT_NODUP; | |
1707 | struct string_list remove_from_merge = STRING_LIST_INIT_NODUP; | |
1708 | ||
1709 | hashmap_iter_init(dir_re_head, &iter); | |
1710 | while ((head_ent = hashmap_iter_next(&iter))) { | |
1711 | merge_ent = dir_rename_find_entry(dir_re_merge, head_ent->dir); | |
1712 | if (merge_ent && | |
1713 | !head_ent->non_unique_new_dir && | |
1714 | !merge_ent->non_unique_new_dir && | |
1715 | !strbuf_cmp(&head_ent->new_dir, &merge_ent->new_dir)) { | |
1716 | /* 1. Renamed identically; remove it from both sides */ | |
1717 | string_list_append(&remove_from_head, | |
1718 | head_ent->dir)->util = head_ent; | |
1719 | strbuf_release(&head_ent->new_dir); | |
1720 | string_list_append(&remove_from_merge, | |
1721 | merge_ent->dir)->util = merge_ent; | |
1722 | strbuf_release(&merge_ent->new_dir); | |
1723 | } else if (tree_has_path(head, head_ent->dir)) { | |
1724 | /* 2. This wasn't a directory rename after all */ | |
1725 | string_list_append(&remove_from_head, | |
1726 | head_ent->dir)->util = head_ent; | |
1727 | strbuf_release(&head_ent->new_dir); | |
1728 | } | |
1729 | } | |
1730 | ||
1731 | remove_hashmap_entries(dir_re_head, &remove_from_head); | |
1732 | remove_hashmap_entries(dir_re_merge, &remove_from_merge); | |
1733 | ||
1734 | hashmap_iter_init(dir_re_merge, &iter); | |
1735 | while ((merge_ent = hashmap_iter_next(&iter))) { | |
1736 | head_ent = dir_rename_find_entry(dir_re_head, merge_ent->dir); | |
1737 | if (tree_has_path(merge, merge_ent->dir)) { | |
1738 | /* 2. This wasn't a directory rename after all */ | |
1739 | string_list_append(&remove_from_merge, | |
1740 | merge_ent->dir)->util = merge_ent; | |
1741 | } else if (head_ent && | |
1742 | !head_ent->non_unique_new_dir && | |
1743 | !merge_ent->non_unique_new_dir) { | |
1744 | /* 3. rename/rename(1to2) */ | |
1745 | /* | |
1746 | * We can assume it's not rename/rename(1to1) because | |
1747 | * that was case (1), already checked above. So we | |
1748 | * know that head_ent->new_dir and merge_ent->new_dir | |
1749 | * are different strings. | |
1750 | */ | |
1751 | output(o, 1, _("CONFLICT (rename/rename): " | |
1752 | "Rename directory %s->%s in %s. " | |
1753 | "Rename directory %s->%s in %s"), | |
1754 | head_ent->dir, head_ent->new_dir.buf, o->branch1, | |
1755 | head_ent->dir, merge_ent->new_dir.buf, o->branch2); | |
1756 | string_list_append(&remove_from_head, | |
1757 | head_ent->dir)->util = head_ent; | |
1758 | strbuf_release(&head_ent->new_dir); | |
1759 | string_list_append(&remove_from_merge, | |
1760 | merge_ent->dir)->util = merge_ent; | |
1761 | strbuf_release(&merge_ent->new_dir); | |
1762 | } | |
1763 | } | |
1764 | ||
1765 | remove_hashmap_entries(dir_re_head, &remove_from_head); | |
1766 | remove_hashmap_entries(dir_re_merge, &remove_from_merge); | |
1767 | } | |
1768 | ||
7fe40b88 EN |
1769 | static struct hashmap *get_directory_renames(struct diff_queue_struct *pairs, |
1770 | struct tree *tree) | |
1771 | { | |
1772 | struct hashmap *dir_renames; | |
1773 | struct hashmap_iter iter; | |
1774 | struct dir_rename_entry *entry; | |
1775 | int i; | |
1776 | ||
1777 | /* | |
1778 | * Typically, we think of a directory rename as all files from a | |
1779 | * certain directory being moved to a target directory. However, | |
1780 | * what if someone first moved two files from the original | |
1781 | * directory in one commit, and then renamed the directory | |
1782 | * somewhere else in a later commit? At merge time, we just know | |
1783 | * that files from the original directory went to two different | |
1784 | * places, and that the bulk of them ended up in the same place. | |
1785 | * We want each directory rename to represent where the bulk of the | |
1786 | * files from that directory end up; this function exists to find | |
1787 | * where the bulk of the files went. | |
1788 | * | |
1789 | * The first loop below simply iterates through the list of file | |
1790 | * renames, finding out how often each directory rename pair | |
1791 | * possibility occurs. | |
1792 | */ | |
1793 | dir_renames = xmalloc(sizeof(*dir_renames)); | |
1794 | dir_rename_init(dir_renames); | |
1795 | for (i = 0; i < pairs->nr; ++i) { | |
1796 | struct string_list_item *item; | |
1797 | int *count; | |
1798 | struct diff_filepair *pair = pairs->queue[i]; | |
1799 | char *old_dir, *new_dir; | |
1800 | ||
1801 | /* File not part of directory rename if it wasn't renamed */ | |
1802 | if (pair->status != 'R') | |
1803 | continue; | |
1804 | ||
1805 | get_renamed_dir_portion(pair->one->path, pair->two->path, | |
1806 | &old_dir, &new_dir); | |
1807 | if (!old_dir) | |
1808 | /* Directory didn't change at all; ignore this one. */ | |
1809 | continue; | |
1810 | ||
1811 | entry = dir_rename_find_entry(dir_renames, old_dir); | |
1812 | if (!entry) { | |
1813 | entry = xmalloc(sizeof(*entry)); | |
1814 | dir_rename_entry_init(entry, old_dir); | |
1815 | hashmap_put(dir_renames, entry); | |
1816 | } else { | |
1817 | free(old_dir); | |
1818 | } | |
1819 | item = string_list_lookup(&entry->possible_new_dirs, new_dir); | |
1820 | if (!item) { | |
1821 | item = string_list_insert(&entry->possible_new_dirs, | |
1822 | new_dir); | |
1823 | item->util = xcalloc(1, sizeof(int)); | |
1824 | } else { | |
1825 | free(new_dir); | |
1826 | } | |
1827 | count = item->util; | |
1828 | *count += 1; | |
1829 | } | |
1830 | ||
1831 | /* | |
1832 | * For each directory with files moved out of it, we find out which | |
1833 | * target directory received the most files so we can declare it to | |
1834 | * be the "winning" target location for the directory rename. This | |
1835 | * winner gets recorded in new_dir. If there is no winner | |
1836 | * (multiple target directories received the same number of files), | |
1837 | * we set non_unique_new_dir. Once we've determined the winner (or | |
1838 | * that there is no winner), we no longer need possible_new_dirs. | |
1839 | */ | |
1840 | hashmap_iter_init(dir_renames, &iter); | |
1841 | while ((entry = hashmap_iter_next(&iter))) { | |
1842 | int max = 0; | |
1843 | int bad_max = 0; | |
1844 | char *best = NULL; | |
1845 | ||
1846 | for (i = 0; i < entry->possible_new_dirs.nr; i++) { | |
1847 | int *count = entry->possible_new_dirs.items[i].util; | |
1848 | ||
1849 | if (*count == max) | |
1850 | bad_max = max; | |
1851 | else if (*count > max) { | |
1852 | max = *count; | |
1853 | best = entry->possible_new_dirs.items[i].string; | |
1854 | } | |
1855 | } | |
1856 | if (bad_max == max) | |
1857 | entry->non_unique_new_dir = 1; | |
1858 | else { | |
1859 | assert(entry->new_dir.len == 0); | |
1860 | strbuf_addstr(&entry->new_dir, best); | |
1861 | } | |
1862 | /* | |
1863 | * The relevant directory sub-portion of the original full | |
1864 | * filepaths were xstrndup'ed before inserting into | |
1865 | * possible_new_dirs, and instead of manually iterating the | |
1866 | * list and free'ing each, just lie and tell | |
1867 | * possible_new_dirs that it did the strdup'ing so that it | |
1868 | * will free them for us. | |
1869 | */ | |
1870 | entry->possible_new_dirs.strdup_strings = 1; | |
1871 | string_list_clear(&entry->possible_new_dirs, 1); | |
1872 | } | |
1873 | ||
1874 | return dir_renames; | |
1875 | } | |
1876 | ||
e95ab70a EN |
1877 | static struct dir_rename_entry *check_dir_renamed(const char *path, |
1878 | struct hashmap *dir_renames) | |
1879 | { | |
1880 | char temp[PATH_MAX]; | |
1881 | char *end; | |
1882 | struct dir_rename_entry *entry; | |
1883 | ||
1884 | strcpy(temp, path); | |
1885 | while ((end = strrchr(temp, '/'))) { | |
1886 | *end = '\0'; | |
1887 | entry = dir_rename_find_entry(dir_renames, temp); | |
1888 | if (entry) | |
1889 | return entry; | |
1890 | } | |
1891 | return NULL; | |
1892 | } | |
1893 | ||
1894 | static void compute_collisions(struct hashmap *collisions, | |
1895 | struct hashmap *dir_renames, | |
1896 | struct diff_queue_struct *pairs) | |
1897 | { | |
1898 | int i; | |
1899 | ||
1900 | /* | |
1901 | * Multiple files can be mapped to the same path due to directory | |
1902 | * renames done by the other side of history. Since that other | |
1903 | * side of history could have merged multiple directories into one, | |
1904 | * if our side of history added the same file basename to each of | |
1905 | * those directories, then all N of them would get implicitly | |
1906 | * renamed by the directory rename detection into the same path, | |
1907 | * and we'd get an add/add/.../add conflict, and all those adds | |
1908 | * from *this* side of history. This is not representable in the | |
1909 | * index, and users aren't going to easily be able to make sense of | |
1910 | * it. So we need to provide a good warning about what's | |
1911 | * happening, and fall back to no-directory-rename detection | |
1912 | * behavior for those paths. | |
1913 | * | |
1914 | * See testcases 9e and all of section 5 from t6043 for examples. | |
1915 | */ | |
1916 | collision_init(collisions); | |
1917 | ||
1918 | for (i = 0; i < pairs->nr; ++i) { | |
1919 | struct dir_rename_entry *dir_rename_ent; | |
1920 | struct collision_entry *collision_ent; | |
1921 | char *new_path; | |
1922 | struct diff_filepair *pair = pairs->queue[i]; | |
1923 | ||
1924 | if (pair->status == 'D') | |
1925 | continue; | |
1926 | dir_rename_ent = check_dir_renamed(pair->two->path, | |
1927 | dir_renames); | |
1928 | if (!dir_rename_ent) | |
1929 | continue; | |
1930 | ||
1931 | new_path = apply_dir_rename(dir_rename_ent, pair->two->path); | |
1932 | if (!new_path) | |
1933 | /* | |
1934 | * dir_rename_ent->non_unique_new_path is true, which | |
1935 | * means there is no directory rename for us to use, | |
1936 | * which means it won't cause us any additional | |
1937 | * collisions. | |
1938 | */ | |
1939 | continue; | |
1940 | collision_ent = collision_find_entry(collisions, new_path); | |
1941 | if (!collision_ent) { | |
1942 | collision_ent = xcalloc(1, | |
1943 | sizeof(struct collision_entry)); | |
1944 | hashmap_entry_init(collision_ent, strhash(new_path)); | |
1945 | hashmap_put(collisions, collision_ent); | |
1946 | collision_ent->target_file = new_path; | |
1947 | } else { | |
1948 | free(new_path); | |
1949 | } | |
1950 | string_list_insert(&collision_ent->source_files, | |
1951 | pair->two->path); | |
1952 | } | |
1953 | } | |
1954 | ||
f6f77559 EN |
1955 | static char *check_for_directory_rename(struct merge_options *o, |
1956 | const char *path, | |
1957 | struct tree *tree, | |
1958 | struct hashmap *dir_renames, | |
1959 | struct hashmap *dir_rename_exclusions, | |
1960 | struct hashmap *collisions, | |
1961 | int *clean_merge) | |
1962 | { | |
1963 | char *new_path = NULL; | |
1964 | struct dir_rename_entry *entry = check_dir_renamed(path, dir_renames); | |
1965 | struct dir_rename_entry *oentry = NULL; | |
1966 | ||
1967 | if (!entry) | |
1968 | return new_path; | |
1969 | ||
1970 | /* | |
1971 | * This next part is a little weird. We do not want to do an | |
1972 | * implicit rename into a directory we renamed on our side, because | |
1973 | * that will result in a spurious rename/rename(1to2) conflict. An | |
1974 | * example: | |
1975 | * Base commit: dumbdir/afile, otherdir/bfile | |
1976 | * Side 1: smrtdir/afile, otherdir/bfile | |
1977 | * Side 2: dumbdir/afile, dumbdir/bfile | |
1978 | * Here, while working on Side 1, we could notice that otherdir was | |
1979 | * renamed/merged to dumbdir, and change the diff_filepair for | |
1980 | * otherdir/bfile into a rename into dumbdir/bfile. However, Side | |
1981 | * 2 will notice the rename from dumbdir to smrtdir, and do the | |
1982 | * transitive rename to move it from dumbdir/bfile to | |
1983 | * smrtdir/bfile. That gives us bfile in dumbdir vs being in | |
1984 | * smrtdir, a rename/rename(1to2) conflict. We really just want | |
1985 | * the file to end up in smrtdir. And the way to achieve that is | |
1986 | * to not let Side1 do the rename to dumbdir, since we know that is | |
1987 | * the source of one of our directory renames. | |
1988 | * | |
1989 | * That's why oentry and dir_rename_exclusions is here. | |
1990 | * | |
1991 | * As it turns out, this also prevents N-way transient rename | |
1992 | * confusion; See testcases 9c and 9d of t6043. | |
1993 | */ | |
1994 | oentry = dir_rename_find_entry(dir_rename_exclusions, entry->new_dir.buf); | |
1995 | if (oentry) { | |
1996 | output(o, 1, _("WARNING: Avoiding applying %s -> %s rename " | |
1997 | "to %s, because %s itself was renamed."), | |
1998 | entry->dir, entry->new_dir.buf, path, entry->new_dir.buf); | |
1999 | } else { | |
2000 | new_path = handle_path_level_conflicts(o, path, entry, | |
2001 | collisions, tree); | |
2002 | *clean_merge &= (new_path != NULL); | |
2003 | } | |
2004 | ||
2005 | return new_path; | |
2006 | } | |
2007 | ||
9c0743fe EN |
2008 | static void apply_directory_rename_modifications(struct merge_options *o, |
2009 | struct diff_filepair *pair, | |
2010 | char *new_path, | |
2011 | struct rename *re, | |
2012 | struct tree *tree, | |
2013 | struct tree *o_tree, | |
2014 | struct tree *a_tree, | |
2015 | struct tree *b_tree, | |
2016 | struct string_list *entries, | |
2017 | int *clean) | |
2018 | { | |
2019 | struct string_list_item *item; | |
2020 | int stage = (tree == a_tree ? 2 : 3); | |
2021 | ||
2022 | /* | |
2023 | * In all cases where we can do directory rename detection, | |
2024 | * unpack_trees() will have read pair->two->path into the | |
2025 | * index and the working copy. We need to remove it so that | |
2026 | * we can instead place it at new_path. It is guaranteed to | |
2027 | * not be untracked (unpack_trees() would have errored out | |
2028 | * saying the file would have been overwritten), but it might | |
2029 | * be dirty, though. | |
2030 | */ | |
2031 | remove_file(o, 1, pair->two->path, 0 /* no_wd */); | |
2032 | ||
2033 | /* Find or create a new re->dst_entry */ | |
2034 | item = string_list_lookup(entries, new_path); | |
2035 | if (item) { | |
2036 | /* | |
2037 | * Since we're renaming on this side of history, and it's | |
2038 | * due to a directory rename on the other side of history | |
2039 | * (which we only allow when the directory in question no | |
2040 | * longer exists on the other side of history), the | |
2041 | * original entry for re->dst_entry is no longer | |
2042 | * necessary... | |
2043 | */ | |
2044 | re->dst_entry->processed = 1; | |
2045 | ||
2046 | /* | |
2047 | * ...because we'll be using this new one. | |
2048 | */ | |
2049 | re->dst_entry = item->util; | |
2050 | } else { | |
2051 | /* | |
2052 | * re->dst_entry is for the before-dir-rename path, and we | |
2053 | * need it to hold information for the after-dir-rename | |
2054 | * path. Before creating a new entry, we need to mark the | |
2055 | * old one as unnecessary (...unless it is shared by | |
2056 | * src_entry, i.e. this didn't use to be a rename, in which | |
2057 | * case we can just allow the normal processing to happen | |
2058 | * for it). | |
2059 | */ | |
2060 | if (pair->status == 'R') | |
2061 | re->dst_entry->processed = 1; | |
2062 | ||
2063 | re->dst_entry = insert_stage_data(new_path, | |
2064 | o_tree, a_tree, b_tree, | |
2065 | entries); | |
2066 | item = string_list_insert(entries, new_path); | |
2067 | item->util = re->dst_entry; | |
2068 | } | |
2069 | ||
2070 | /* | |
2071 | * Update the stage_data with the information about the path we are | |
2072 | * moving into place. That slot will be empty and available for us | |
2073 | * to write to because of the collision checks in | |
2074 | * handle_path_level_conflicts(). In other words, | |
2075 | * re->dst_entry->stages[stage].oid will be the null_oid, so it's | |
2076 | * open for us to write to. | |
2077 | * | |
2078 | * It may be tempting to actually update the index at this point as | |
2079 | * well, using update_stages_for_stage_data(), but as per the big | |
2080 | * "NOTE" in update_stages(), doing so will modify the current | |
2081 | * in-memory index which will break calls to would_lose_untracked() | |
2082 | * that we need to make. Instead, we need to just make sure that | |
2083 | * the various conflict_rename_*() functions update the index | |
2084 | * explicitly rather than relying on unpack_trees() to have done it. | |
2085 | */ | |
2086 | get_tree_entry(&tree->object.oid, | |
2087 | pair->two->path, | |
2088 | &re->dst_entry->stages[stage].oid, | |
2089 | &re->dst_entry->stages[stage].mode); | |
2090 | ||
2091 | /* Update pair status */ | |
2092 | if (pair->status == 'A') { | |
2093 | /* | |
2094 | * Recording rename information for this add makes it look | |
2095 | * like a rename/delete conflict. Make sure we can | |
2096 | * correctly handle this as an add that was moved to a new | |
2097 | * directory instead of reporting a rename/delete conflict. | |
2098 | */ | |
2099 | re->add_turned_into_rename = 1; | |
2100 | } | |
2101 | /* | |
2102 | * We don't actually look at pair->status again, but it seems | |
2103 | * pedagogically correct to adjust it. | |
2104 | */ | |
2105 | pair->status = 'R'; | |
2106 | ||
2107 | /* | |
2108 | * Finally, record the new location. | |
2109 | */ | |
2110 | pair->two->path = new_path; | |
2111 | } | |
2112 | ||
e5257b2a EN |
2113 | /* |
2114 | * Get information of all renames which occurred in 'pairs', making use of | |
2115 | * any implicit directory renames inferred from the other side of history. | |
2116 | * We need the three trees in the merge ('o_tree', 'a_tree' and 'b_tree') | |
2117 | * to be able to associate the correct cache entries with the rename | |
2118 | * information; tree is always equal to either a_tree or b_tree. | |
2119 | */ | |
2120 | static struct string_list *get_renames(struct merge_options *o, | |
2121 | struct diff_queue_struct *pairs, | |
e95ab70a | 2122 | struct hashmap *dir_renames, |
f6f77559 | 2123 | struct hashmap *dir_rename_exclusions, |
e5257b2a EN |
2124 | struct tree *tree, |
2125 | struct tree *o_tree, | |
2126 | struct tree *a_tree, | |
2127 | struct tree *b_tree, | |
f6f77559 EN |
2128 | struct string_list *entries, |
2129 | int *clean_merge) | |
e5257b2a EN |
2130 | { |
2131 | int i; | |
e95ab70a EN |
2132 | struct hashmap collisions; |
2133 | struct hashmap_iter iter; | |
2134 | struct collision_entry *e; | |
e5257b2a EN |
2135 | struct string_list *renames; |
2136 | ||
e95ab70a | 2137 | compute_collisions(&collisions, dir_renames, pairs); |
e5257b2a EN |
2138 | renames = xcalloc(1, sizeof(struct string_list)); |
2139 | ||
2140 | for (i = 0; i < pairs->nr; ++i) { | |
9ba91557 EN |
2141 | struct string_list_item *item; |
2142 | struct rename *re; | |
e5257b2a | 2143 | struct diff_filepair *pair = pairs->queue[i]; |
f6f77559 | 2144 | char *new_path; /* non-NULL only with directory renames */ |
9ba91557 | 2145 | |
f6f77559 | 2146 | if (pair->status == 'D') { |
9ba91557 EN |
2147 | diff_free_filepair(pair); |
2148 | continue; | |
2149 | } | |
f6f77559 EN |
2150 | new_path = check_for_directory_rename(o, pair->two->path, tree, |
2151 | dir_renames, | |
2152 | dir_rename_exclusions, | |
2153 | &collisions, | |
2154 | clean_merge); | |
2155 | if (pair->status != 'R' && !new_path) { | |
2156 | diff_free_filepair(pair); | |
2157 | continue; | |
2158 | } | |
2159 | ||
9ba91557 EN |
2160 | re = xmalloc(sizeof(*re)); |
2161 | re->processed = 0; | |
9c0743fe | 2162 | re->add_turned_into_rename = 0; |
9ba91557 EN |
2163 | re->pair = pair; |
2164 | item = string_list_lookup(entries, re->pair->one->path); | |
2165 | if (!item) | |
2166 | re->src_entry = insert_stage_data(re->pair->one->path, | |
2167 | o_tree, a_tree, b_tree, entries); | |
2168 | else | |
2169 | re->src_entry = item->util; | |
2170 | ||
2171 | item = string_list_lookup(entries, re->pair->two->path); | |
2172 | if (!item) | |
2173 | re->dst_entry = insert_stage_data(re->pair->two->path, | |
2174 | o_tree, a_tree, b_tree, entries); | |
2175 | else | |
2176 | re->dst_entry = item->util; | |
2177 | item = string_list_insert(renames, pair->one->path); | |
2178 | item->util = re; | |
9c0743fe EN |
2179 | if (new_path) |
2180 | apply_directory_rename_modifications(o, pair, new_path, | |
2181 | re, tree, o_tree, | |
2182 | a_tree, b_tree, | |
2183 | entries, | |
2184 | clean_merge); | |
9ba91557 | 2185 | } |
e95ab70a EN |
2186 | |
2187 | hashmap_iter_init(&collisions, &iter); | |
2188 | while ((e = hashmap_iter_next(&iter))) { | |
2189 | free(e->target_file); | |
2190 | string_list_clear(&e->source_files, 0); | |
2191 | } | |
2192 | hashmap_free(&collisions, 1); | |
9ba91557 EN |
2193 | return renames; |
2194 | } | |
2195 | ||
8a2fce18 MV |
2196 | static int process_renames(struct merge_options *o, |
2197 | struct string_list *a_renames, | |
2198 | struct string_list *b_renames) | |
9047ebbc MV |
2199 | { |
2200 | int clean_merge = 1, i, j; | |
183113a5 TF |
2201 | struct string_list a_by_dst = STRING_LIST_INIT_NODUP; |
2202 | struct string_list b_by_dst = STRING_LIST_INIT_NODUP; | |
9047ebbc MV |
2203 | const struct rename *sre; |
2204 | ||
2205 | for (i = 0; i < a_renames->nr; i++) { | |
2206 | sre = a_renames->items[i].util; | |
78a395d3 | 2207 | string_list_insert(&a_by_dst, sre->pair->two->path)->util |
0a6b8712 | 2208 | = (void *)sre; |
9047ebbc MV |
2209 | } |
2210 | for (i = 0; i < b_renames->nr; i++) { | |
2211 | sre = b_renames->items[i].util; | |
78a395d3 | 2212 | string_list_insert(&b_by_dst, sre->pair->two->path)->util |
0a6b8712 | 2213 | = (void *)sre; |
9047ebbc MV |
2214 | } |
2215 | ||
2216 | for (i = 0, j = 0; i < a_renames->nr || j < b_renames->nr;) { | |
8e24cbae | 2217 | struct string_list *renames1, *renames2Dst; |
9047ebbc MV |
2218 | struct rename *ren1 = NULL, *ren2 = NULL; |
2219 | const char *branch1, *branch2; | |
2220 | const char *ren1_src, *ren1_dst; | |
461f5041 | 2221 | struct string_list_item *lookup; |
9047ebbc MV |
2222 | |
2223 | if (i >= a_renames->nr) { | |
9047ebbc MV |
2224 | ren2 = b_renames->items[j++].util; |
2225 | } else if (j >= b_renames->nr) { | |
9047ebbc MV |
2226 | ren1 = a_renames->items[i++].util; |
2227 | } else { | |
8e24cbae BK |
2228 | int compare = strcmp(a_renames->items[i].string, |
2229 | b_renames->items[j].string); | |
9047ebbc MV |
2230 | if (compare <= 0) |
2231 | ren1 = a_renames->items[i++].util; | |
2232 | if (compare >= 0) | |
2233 | ren2 = b_renames->items[j++].util; | |
2234 | } | |
2235 | ||
2236 | /* TODO: refactor, so that 1/2 are not needed */ | |
2237 | if (ren1) { | |
2238 | renames1 = a_renames; | |
9047ebbc | 2239 | renames2Dst = &b_by_dst; |
8a2fce18 MV |
2240 | branch1 = o->branch1; |
2241 | branch2 = o->branch2; | |
9047ebbc | 2242 | } else { |
9047ebbc | 2243 | renames1 = b_renames; |
9047ebbc | 2244 | renames2Dst = &a_by_dst; |
8a2fce18 MV |
2245 | branch1 = o->branch2; |
2246 | branch2 = o->branch1; | |
35d803bc | 2247 | SWAP(ren2, ren1); |
9047ebbc | 2248 | } |
9047ebbc | 2249 | |
9047ebbc MV |
2250 | if (ren1->processed) |
2251 | continue; | |
2252 | ren1->processed = 1; | |
9047ebbc | 2253 | ren1->dst_entry->processed = 1; |
7769a75e EN |
2254 | /* BUG: We should only mark src_entry as processed if we |
2255 | * are not dealing with a rename + add-source case. | |
2256 | */ | |
9047ebbc | 2257 | ren1->src_entry->processed = 1; |
9047ebbc MV |
2258 | |
2259 | ren1_src = ren1->pair->one->path; | |
2260 | ren1_dst = ren1->pair->two->path; | |
2261 | ||
2262 | if (ren2) { | |
461f5041 | 2263 | /* One file renamed on both sides */ |
9047ebbc MV |
2264 | const char *ren2_src = ren2->pair->one->path; |
2265 | const char *ren2_dst = ren2->pair->two->path; | |
4f66dade | 2266 | enum rename_type rename_type; |
9047ebbc | 2267 | if (strcmp(ren1_src, ren2_src) != 0) |
ef1177d1 | 2268 | die("BUG: ren1_src != ren2_src"); |
9047ebbc MV |
2269 | ren2->dst_entry->processed = 1; |
2270 | ren2->processed = 1; | |
2271 | if (strcmp(ren1_dst, ren2_dst) != 0) { | |
4f66dade | 2272 | rename_type = RENAME_ONE_FILE_TO_TWO; |
461f5041 | 2273 | clean_merge = 0; |
9047ebbc | 2274 | } else { |
4f66dade | 2275 | rename_type = RENAME_ONE_FILE_TO_ONE; |
7769a75e EN |
2276 | /* BUG: We should only remove ren1_src in |
2277 | * the base stage (think of rename + | |
2278 | * add-source cases). | |
2279 | */ | |
b7fa51da | 2280 | remove_file(o, 1, ren1_src, 1); |
b8ddf164 EN |
2281 | update_entry(ren1->dst_entry, |
2282 | ren1->pair->one, | |
2283 | ren1->pair->two, | |
2284 | ren2->pair->two); | |
9047ebbc | 2285 | } |
4f66dade EN |
2286 | setup_rename_conflict_info(rename_type, |
2287 | ren1->pair, | |
2288 | ren2->pair, | |
2289 | branch1, | |
2290 | branch2, | |
2291 | ren1->dst_entry, | |
232c635f EN |
2292 | ren2->dst_entry, |
2293 | o, | |
2294 | NULL, | |
2295 | NULL); | |
461f5041 EN |
2296 | } else if ((lookup = string_list_lookup(renames2Dst, ren1_dst))) { |
2297 | /* Two different files renamed to the same thing */ | |
2298 | char *ren2_dst; | |
2299 | ren2 = lookup->util; | |
2300 | ren2_dst = ren2->pair->two->path; | |
2301 | if (strcmp(ren1_dst, ren2_dst) != 0) | |
ef1177d1 | 2302 | die("BUG: ren1_dst != ren2_dst"); |
461f5041 EN |
2303 | |
2304 | clean_merge = 0; | |
2305 | ren2->processed = 1; | |
2306 | /* | |
2307 | * BUG: We should only mark src_entry as processed | |
2308 | * if we are not dealing with a rename + add-source | |
2309 | * case. | |
2310 | */ | |
2311 | ren2->src_entry->processed = 1; | |
2312 | ||
2313 | setup_rename_conflict_info(RENAME_TWO_FILES_TO_ONE, | |
2314 | ren1->pair, | |
2315 | ren2->pair, | |
2316 | branch1, | |
2317 | branch2, | |
2318 | ren1->dst_entry, | |
232c635f EN |
2319 | ren2->dst_entry, |
2320 | o, | |
2321 | ren1->src_entry, | |
2322 | ren2->src_entry); | |
2323 | ||
9047ebbc MV |
2324 | } else { |
2325 | /* Renamed in 1, maybe changed in 2 */ | |
9047ebbc MV |
2326 | /* we only use sha1 and mode of these */ |
2327 | struct diff_filespec src_other, dst_other; | |
41d70bd6 | 2328 | int try_merge; |
9047ebbc | 2329 | |
41d70bd6 EN |
2330 | /* |
2331 | * unpack_trees loads entries from common-commit | |
2332 | * into stage 1, from head-commit into stage 2, and | |
2333 | * from merge-commit into stage 3. We keep track | |
2334 | * of which side corresponds to the rename. | |
2335 | */ | |
2336 | int renamed_stage = a_renames == renames1 ? 2 : 3; | |
2337 | int other_stage = a_renames == renames1 ? 3 : 2; | |
9047ebbc | 2338 | |
7769a75e EN |
2339 | /* BUG: We should only remove ren1_src in the base |
2340 | * stage and in other_stage (think of rename + | |
2341 | * add-source case). | |
2342 | */ | |
531357a4 EN |
2343 | remove_file(o, 1, ren1_src, |
2344 | renamed_stage == 2 || !was_tracked(ren1_src)); | |
9047ebbc | 2345 | |
fd429e98 | 2346 | oidcpy(&src_other.oid, |
2347 | &ren1->src_entry->stages[other_stage].oid); | |
41d70bd6 | 2348 | src_other.mode = ren1->src_entry->stages[other_stage].mode; |
fd429e98 | 2349 | oidcpy(&dst_other.oid, |
2350 | &ren1->dst_entry->stages[other_stage].oid); | |
41d70bd6 | 2351 | dst_other.mode = ren1->dst_entry->stages[other_stage].mode; |
9047ebbc MV |
2352 | try_merge = 0; |
2353 | ||
9c0743fe EN |
2354 | if (oid_eq(&src_other.oid, &null_oid) && |
2355 | ren1->add_turned_into_rename) { | |
2356 | setup_rename_conflict_info(RENAME_DIR, | |
2357 | ren1->pair, | |
2358 | NULL, | |
2359 | branch1, | |
2360 | branch2, | |
2361 | ren1->dst_entry, | |
2362 | NULL, | |
2363 | o, | |
2364 | NULL, | |
2365 | NULL); | |
2366 | } else if (oid_eq(&src_other.oid, &null_oid)) { | |
4f66dade EN |
2367 | setup_rename_conflict_info(RENAME_DELETE, |
2368 | ren1->pair, | |
2369 | NULL, | |
2370 | branch1, | |
2371 | branch2, | |
2372 | ren1->dst_entry, | |
232c635f EN |
2373 | NULL, |
2374 | o, | |
2375 | NULL, | |
4f66dade | 2376 | NULL); |
d5af5105 | 2377 | } else if ((dst_other.mode == ren1->pair->two->mode) && |
b4da9d62 | 2378 | oid_eq(&dst_other.oid, &ren1->pair->two->oid)) { |
35a74abf EN |
2379 | /* |
2380 | * Added file on the other side identical to | |
2381 | * the file being renamed: clean merge. | |
2382 | * Also, there is no need to overwrite the | |
2383 | * file already in the working copy, so call | |
2384 | * update_file_flags() instead of | |
2385 | * update_file(). | |
2386 | */ | |
75456f96 JS |
2387 | if (update_file_flags(o, |
2388 | &ren1->pair->two->oid, | |
2389 | ren1->pair->two->mode, | |
2390 | ren1_dst, | |
2391 | 1, /* update_cache */ | |
2392 | 0 /* update_wd */)) | |
2393 | clean_merge = -1; | |
b4da9d62 | 2394 | } else if (!oid_eq(&dst_other.oid, &null_oid)) { |
9047ebbc MV |
2395 | clean_merge = 0; |
2396 | try_merge = 1; | |
55653a68 JX |
2397 | output(o, 1, _("CONFLICT (rename/add): Rename %s->%s in %s. " |
2398 | "%s added in %s"), | |
9047ebbc MV |
2399 | ren1_src, ren1_dst, branch1, |
2400 | ren1_dst, branch2); | |
c94736a2 JH |
2401 | if (o->call_depth) { |
2402 | struct merge_file_info mfi; | |
3c8a51e8 JS |
2403 | if (merge_file_one(o, ren1_dst, &null_oid, 0, |
2404 | &ren1->pair->two->oid, | |
2405 | ren1->pair->two->mode, | |
2406 | &dst_other.oid, | |
2407 | dst_other.mode, | |
75456f96 JS |
2408 | branch1, branch2, &mfi)) { |
2409 | clean_merge = -1; | |
2410 | goto cleanup_and_return; | |
2411 | } | |
55653a68 | 2412 | output(o, 1, _("Adding merged %s"), ren1_dst); |
75456f96 JS |
2413 | if (update_file(o, 0, &mfi.oid, |
2414 | mfi.mode, ren1_dst)) | |
2415 | clean_merge = -1; | |
2a669c34 | 2416 | try_merge = 0; |
c94736a2 | 2417 | } else { |
3d6b8e88 | 2418 | char *new_path = unique_path(o, ren1_dst, branch2); |
55653a68 | 2419 | output(o, 1, _("Adding as %s instead"), new_path); |
75456f96 JS |
2420 | if (update_file(o, 0, &dst_other.oid, |
2421 | dst_other.mode, new_path)) | |
2422 | clean_merge = -1; | |
3d6b8e88 | 2423 | free(new_path); |
c94736a2 | 2424 | } |
9047ebbc MV |
2425 | } else |
2426 | try_merge = 1; | |
2427 | ||
75456f96 JS |
2428 | if (clean_merge < 0) |
2429 | goto cleanup_and_return; | |
9047ebbc | 2430 | if (try_merge) { |
8a2fce18 | 2431 | struct diff_filespec *one, *a, *b; |
9047ebbc MV |
2432 | src_other.path = (char *)ren1_src; |
2433 | ||
8a2fce18 | 2434 | one = ren1->pair->one; |
9047ebbc MV |
2435 | if (a_renames == renames1) { |
2436 | a = ren1->pair->two; | |
2437 | b = &src_other; | |
2438 | } else { | |
2439 | b = ren1->pair->two; | |
2440 | a = &src_other; | |
2441 | } | |
b8ddf164 | 2442 | update_entry(ren1->dst_entry, one, a, b); |
4f66dade EN |
2443 | setup_rename_conflict_info(RENAME_NORMAL, |
2444 | ren1->pair, | |
2445 | NULL, | |
2446 | branch1, | |
2447 | NULL, | |
2448 | ren1->dst_entry, | |
232c635f EN |
2449 | NULL, |
2450 | o, | |
2451 | NULL, | |
4f66dade | 2452 | NULL); |
9047ebbc MV |
2453 | } |
2454 | } | |
2455 | } | |
75456f96 | 2456 | cleanup_and_return: |
9047ebbc MV |
2457 | string_list_clear(&a_by_dst, 0); |
2458 | string_list_clear(&b_by_dst, 0); | |
2459 | ||
2460 | return clean_merge; | |
2461 | } | |
2462 | ||
f172589e EN |
2463 | struct rename_info { |
2464 | struct string_list *head_renames; | |
2465 | struct string_list *merge_renames; | |
2466 | }; | |
2467 | ||
7fe40b88 EN |
2468 | static void initial_cleanup_rename(struct diff_queue_struct *pairs, |
2469 | struct hashmap *dir_renames) | |
ffc16c49 | 2470 | { |
7fe40b88 EN |
2471 | struct hashmap_iter iter; |
2472 | struct dir_rename_entry *e; | |
2473 | ||
2474 | hashmap_iter_init(dir_renames, &iter); | |
2475 | while ((e = hashmap_iter_next(&iter))) { | |
2476 | free(e->dir); | |
2477 | strbuf_release(&e->new_dir); | |
2478 | /* possible_new_dirs already cleared in get_directory_renames */ | |
2479 | } | |
2480 | hashmap_free(dir_renames, 1); | |
2481 | free(dir_renames); | |
2482 | ||
ffc16c49 EN |
2483 | free(pairs->queue); |
2484 | free(pairs); | |
2485 | } | |
2486 | ||
f172589e EN |
2487 | static int handle_renames(struct merge_options *o, |
2488 | struct tree *common, | |
2489 | struct tree *head, | |
2490 | struct tree *merge, | |
2491 | struct string_list *entries, | |
2492 | struct rename_info *ri) | |
2493 | { | |
e5257b2a | 2494 | struct diff_queue_struct *head_pairs, *merge_pairs; |
7fe40b88 | 2495 | struct hashmap *dir_re_head, *dir_re_merge; |
f6f77559 | 2496 | int clean = 1; |
e5257b2a | 2497 | |
3992ff0c EN |
2498 | ri->head_renames = NULL; |
2499 | ri->merge_renames = NULL; | |
2500 | ||
2501 | if (!o->detect_rename) | |
2502 | return 1; | |
2503 | ||
e5257b2a EN |
2504 | head_pairs = get_diffpairs(o, common, head); |
2505 | merge_pairs = get_diffpairs(o, common, merge); | |
2506 | ||
7fe40b88 EN |
2507 | dir_re_head = get_directory_renames(head_pairs, head); |
2508 | dir_re_merge = get_directory_renames(merge_pairs, merge); | |
2509 | ||
96e7ffbd EN |
2510 | handle_directory_level_conflicts(o, |
2511 | dir_re_head, head, | |
2512 | dir_re_merge, merge); | |
2513 | ||
e95ab70a | 2514 | ri->head_renames = get_renames(o, head_pairs, |
f6f77559 EN |
2515 | dir_re_merge, dir_re_head, head, |
2516 | common, head, merge, entries, | |
2517 | &clean); | |
2518 | if (clean < 0) | |
2519 | goto cleanup; | |
e95ab70a | 2520 | ri->merge_renames = get_renames(o, merge_pairs, |
f6f77559 EN |
2521 | dir_re_head, dir_re_merge, merge, |
2522 | common, head, merge, entries, | |
2523 | &clean); | |
2524 | if (clean < 0) | |
2525 | goto cleanup; | |
2526 | clean &= process_renames(o, ri->head_renames, ri->merge_renames); | |
2527 | ||
2528 | cleanup: | |
e5257b2a EN |
2529 | /* |
2530 | * Some cleanup is deferred until cleanup_renames() because the | |
2531 | * data structures are still needed and referenced in | |
2532 | * process_entry(). But there are a few things we can free now. | |
2533 | */ | |
7fe40b88 EN |
2534 | initial_cleanup_rename(head_pairs, dir_re_head); |
2535 | initial_cleanup_rename(merge_pairs, dir_re_merge); | |
e5257b2a EN |
2536 | |
2537 | return clean; | |
f172589e EN |
2538 | } |
2539 | ||
ffc16c49 | 2540 | static void final_cleanup_rename(struct string_list *rename) |
f172589e | 2541 | { |
9cfee25a EN |
2542 | const struct rename *re; |
2543 | int i; | |
f172589e | 2544 | |
3992ff0c EN |
2545 | if (rename == NULL) |
2546 | return; | |
2547 | ||
9cfee25a EN |
2548 | for (i = 0; i < rename->nr; i++) { |
2549 | re = rename->items[i].util; | |
2550 | diff_free_filepair(re->pair); | |
2551 | } | |
2552 | string_list_clear(rename, 1); | |
2553 | free(rename); | |
2554 | } | |
2555 | ||
ffc16c49 | 2556 | static void final_cleanup_renames(struct rename_info *re_info) |
9cfee25a | 2557 | { |
ffc16c49 EN |
2558 | final_cleanup_rename(re_info->head_renames); |
2559 | final_cleanup_rename(re_info->merge_renames); | |
f172589e EN |
2560 | } |
2561 | ||
b4da9d62 | 2562 | static struct object_id *stage_oid(const struct object_id *oid, unsigned mode) |
9047ebbc | 2563 | { |
b4da9d62 | 2564 | return (is_null_oid(oid) || mode == 0) ? NULL: (struct object_id *)oid; |
9047ebbc MV |
2565 | } |
2566 | ||
bc9204d4 JS |
2567 | static int read_oid_strbuf(struct merge_options *o, |
2568 | const struct object_id *oid, struct strbuf *dst) | |
331a1838 EB |
2569 | { |
2570 | void *buf; | |
2571 | enum object_type type; | |
2572 | unsigned long size; | |
b4f5aca4 | 2573 | buf = read_object_file(oid, &type, &size); |
331a1838 | 2574 | if (!buf) |
bc9204d4 | 2575 | return err(o, _("cannot read object %s"), oid_to_hex(oid)); |
331a1838 EB |
2576 | if (type != OBJ_BLOB) { |
2577 | free(buf); | |
bc9204d4 | 2578 | return err(o, _("object %s is not a blob"), oid_to_hex(oid)); |
331a1838 EB |
2579 | } |
2580 | strbuf_attach(dst, buf, size, size + 1); | |
2581 | return 0; | |
2582 | } | |
2583 | ||
bc9204d4 JS |
2584 | static int blob_unchanged(struct merge_options *opt, |
2585 | const struct object_id *o_oid, | |
72fac66b | 2586 | unsigned o_mode, |
b4da9d62 | 2587 | const struct object_id *a_oid, |
72fac66b | 2588 | unsigned a_mode, |
3e7589b7 | 2589 | int renormalize, const char *path) |
331a1838 EB |
2590 | { |
2591 | struct strbuf o = STRBUF_INIT; | |
2592 | struct strbuf a = STRBUF_INIT; | |
2593 | int ret = 0; /* assume changed for safety */ | |
2594 | ||
72fac66b JK |
2595 | if (a_mode != o_mode) |
2596 | return 0; | |
b4da9d62 | 2597 | if (oid_eq(o_oid, a_oid)) |
331a1838 | 2598 | return 1; |
3e7589b7 | 2599 | if (!renormalize) |
331a1838 EB |
2600 | return 0; |
2601 | ||
b4da9d62 | 2602 | assert(o_oid && a_oid); |
bc9204d4 | 2603 | if (read_oid_strbuf(opt, o_oid, &o) || read_oid_strbuf(opt, a_oid, &a)) |
331a1838 EB |
2604 | goto error_return; |
2605 | /* | |
2606 | * Note: binary | is used so that both renormalizations are | |
2607 | * performed. Comparison can be skipped if both files are | |
2608 | * unchanged since their sha1s have already been compared. | |
2609 | */ | |
a33e0b2a BW |
2610 | if (renormalize_buffer(&the_index, path, o.buf, o.len, &o) | |
2611 | renormalize_buffer(&the_index, path, a.buf, a.len, &a)) | |
331a1838 EB |
2612 | ret = (o.len == a.len && !memcmp(o.buf, a.buf, o.len)); |
2613 | ||
2614 | error_return: | |
2615 | strbuf_release(&o); | |
2616 | strbuf_release(&a); | |
2617 | return ret; | |
2618 | } | |
2619 | ||
75456f96 | 2620 | static int handle_modify_delete(struct merge_options *o, |
5e3ce663 | 2621 | const char *path, |
b4da9d62 | 2622 | struct object_id *o_oid, int o_mode, |
2623 | struct object_id *a_oid, int a_mode, | |
2624 | struct object_id *b_oid, int b_mode) | |
5e3ce663 | 2625 | { |
b26d87f2 MM |
2626 | const char *modify_branch, *delete_branch; |
2627 | struct object_id *changed_oid; | |
2628 | int changed_mode; | |
2629 | ||
2630 | if (a_oid) { | |
2631 | modify_branch = o->branch1; | |
2632 | delete_branch = o->branch2; | |
2633 | changed_oid = a_oid; | |
2634 | changed_mode = a_mode; | |
2635 | } else { | |
2636 | modify_branch = o->branch2; | |
2637 | delete_branch = o->branch1; | |
2638 | changed_oid = b_oid; | |
2639 | changed_mode = b_mode; | |
2640 | } | |
2641 | ||
75456f96 | 2642 | return handle_change_delete(o, |
b26d87f2 | 2643 | path, NULL, |
75456f96 | 2644 | o_oid, o_mode, |
b26d87f2 MM |
2645 | changed_oid, changed_mode, |
2646 | modify_branch, delete_branch, | |
75456f96 | 2647 | _("modify"), _("modified")); |
5e3ce663 EN |
2648 | } |
2649 | ||
0c4918d1 EN |
2650 | static int merge_content(struct merge_options *o, |
2651 | const char *path, | |
b4da9d62 | 2652 | struct object_id *o_oid, int o_mode, |
2653 | struct object_id *a_oid, int a_mode, | |
2654 | struct object_id *b_oid, int b_mode, | |
4f66dade | 2655 | struct rename_conflict_info *rename_conflict_info) |
0c4918d1 | 2656 | { |
55653a68 | 2657 | const char *reason = _("content"); |
5b448b85 | 2658 | const char *path1 = NULL, *path2 = NULL; |
0c4918d1 EN |
2659 | struct merge_file_info mfi; |
2660 | struct diff_filespec one, a, b; | |
4ab9a157 | 2661 | unsigned df_conflict_remains = 0; |
0c4918d1 | 2662 | |
b4da9d62 | 2663 | if (!o_oid) { |
55653a68 | 2664 | reason = _("add/add"); |
b4da9d62 | 2665 | o_oid = (struct object_id *)&null_oid; |
0c4918d1 EN |
2666 | } |
2667 | one.path = a.path = b.path = (char *)path; | |
b4da9d62 | 2668 | oidcpy(&one.oid, o_oid); |
0c4918d1 | 2669 | one.mode = o_mode; |
b4da9d62 | 2670 | oidcpy(&a.oid, a_oid); |
0c4918d1 | 2671 | a.mode = a_mode; |
b4da9d62 | 2672 | oidcpy(&b.oid, b_oid); |
0c4918d1 EN |
2673 | b.mode = b_mode; |
2674 | ||
3c217c07 | 2675 | if (rename_conflict_info) { |
3c217c07 EN |
2676 | struct diff_filepair *pair1 = rename_conflict_info->pair1; |
2677 | ||
2678 | path1 = (o->branch1 == rename_conflict_info->branch1) ? | |
2679 | pair1->two->path : pair1->one->path; | |
2680 | /* If rename_conflict_info->pair2 != NULL, we are in | |
2681 | * RENAME_ONE_FILE_TO_ONE case. Otherwise, we have a | |
2682 | * normal rename. | |
2683 | */ | |
2684 | path2 = (rename_conflict_info->pair2 || | |
2685 | o->branch2 == rename_conflict_info->branch1) ? | |
2686 | pair1->two->path : pair1->one->path; | |
3c217c07 | 2687 | |
5423d2e7 DT |
2688 | if (dir_in_way(path, !o->call_depth, |
2689 | S_ISGITLINK(pair1->two->mode))) | |
3c217c07 | 2690 | df_conflict_remains = 1; |
4ab9a157 | 2691 | } |
3c8a51e8 JS |
2692 | if (merge_file_special_markers(o, &one, &a, &b, |
2693 | o->branch1, path1, | |
2694 | o->branch2, path2, &mfi)) | |
2695 | return -1; | |
4ab9a157 EN |
2696 | |
2697 | if (mfi.clean && !df_conflict_remains && | |
b4da9d62 | 2698 | oid_eq(&mfi.oid, a_oid) && mfi.mode == a_mode) { |
8b026eda | 2699 | int path_renamed_outside_HEAD; |
55653a68 | 2700 | output(o, 3, _("Skipped %s (merged same as existing)"), path); |
5b448b85 EN |
2701 | /* |
2702 | * The content merge resulted in the same file contents we | |
2703 | * already had. We can return early if those file contents | |
2704 | * are recorded at the correct path (which may not be true | |
2705 | * if the merge involves a rename). | |
2706 | */ | |
8b026eda JH |
2707 | path_renamed_outside_HEAD = !path2 || !strcmp(path, path2); |
2708 | if (!path_renamed_outside_HEAD) { | |
bc9204d4 | 2709 | add_cacheinfo(o, mfi.mode, &mfi.oid, path, |
d45b7f40 | 2710 | 0, (!o->call_depth), 0); |
5b448b85 EN |
2711 | return mfi.clean; |
2712 | } | |
2713 | } else | |
55653a68 | 2714 | output(o, 2, _("Auto-merging %s"), path); |
0c4918d1 EN |
2715 | |
2716 | if (!mfi.clean) { | |
2717 | if (S_ISGITLINK(mfi.mode)) | |
55653a68 JX |
2718 | reason = _("submodule"); |
2719 | output(o, 1, _("CONFLICT (%s): Merge conflict in %s"), | |
0c4918d1 | 2720 | reason, path); |
4f66dade | 2721 | if (rename_conflict_info && !df_conflict_remains) |
bc9204d4 | 2722 | if (update_stages(o, path, &one, &a, &b)) |
75456f96 | 2723 | return -1; |
0c4918d1 EN |
2724 | } |
2725 | ||
8b026eda | 2726 | if (df_conflict_remains) { |
3d6b8e88 | 2727 | char *new_path; |
51931bf0 EN |
2728 | if (o->call_depth) { |
2729 | remove_file_from_cache(path); | |
2730 | } else { | |
75456f96 | 2731 | if (!mfi.clean) { |
bc9204d4 | 2732 | if (update_stages(o, path, &one, &a, &b)) |
75456f96 JS |
2733 | return -1; |
2734 | } else { | |
51931bf0 EN |
2735 | int file_from_stage2 = was_tracked(path); |
2736 | struct diff_filespec merged; | |
9b561499 | 2737 | oidcpy(&merged.oid, &mfi.oid); |
51931bf0 EN |
2738 | merged.mode = mfi.mode; |
2739 | ||
bc9204d4 | 2740 | if (update_stages(o, path, NULL, |
75456f96 JS |
2741 | file_from_stage2 ? &merged : NULL, |
2742 | file_from_stage2 ? NULL : &merged)) | |
2743 | return -1; | |
51931bf0 EN |
2744 | } |
2745 | ||
2746 | } | |
4f66dade | 2747 | new_path = unique_path(o, path, rename_conflict_info->branch1); |
55653a68 | 2748 | output(o, 1, _("Adding as %s instead"), new_path); |
75456f96 JS |
2749 | if (update_file(o, 0, &mfi.oid, mfi.mode, new_path)) { |
2750 | free(new_path); | |
2751 | return -1; | |
2752 | } | |
3d6b8e88 | 2753 | free(new_path); |
51931bf0 | 2754 | mfi.clean = 0; |
75456f96 JS |
2755 | } else if (update_file(o, mfi.clean, &mfi.oid, mfi.mode, path)) |
2756 | return -1; | |
0c4918d1 | 2757 | return mfi.clean; |
0c4918d1 EN |
2758 | } |
2759 | ||
9047ebbc | 2760 | /* Per entry merge function */ |
8a2fce18 MV |
2761 | static int process_entry(struct merge_options *o, |
2762 | const char *path, struct stage_data *entry) | |
9047ebbc | 2763 | { |
9047ebbc | 2764 | int clean_merge = 1; |
1bc0ab7c | 2765 | int normalize = o->renormalize; |
9047ebbc MV |
2766 | unsigned o_mode = entry->stages[1].mode; |
2767 | unsigned a_mode = entry->stages[2].mode; | |
2768 | unsigned b_mode = entry->stages[3].mode; | |
b4da9d62 | 2769 | struct object_id *o_oid = stage_oid(&entry->stages[1].oid, o_mode); |
2770 | struct object_id *a_oid = stage_oid(&entry->stages[2].oid, a_mode); | |
2771 | struct object_id *b_oid = stage_oid(&entry->stages[3].oid, b_mode); | |
9047ebbc | 2772 | |
37348937 | 2773 | entry->processed = 1; |
4f66dade EN |
2774 | if (entry->rename_conflict_info) { |
2775 | struct rename_conflict_info *conflict_info = entry->rename_conflict_info; | |
07413c5a | 2776 | switch (conflict_info->rename_type) { |
882fd11a | 2777 | case RENAME_NORMAL: |
4f66dade | 2778 | case RENAME_ONE_FILE_TO_ONE: |
8b026eda JH |
2779 | clean_merge = merge_content(o, path, |
2780 | o_oid, o_mode, a_oid, a_mode, b_oid, b_mode, | |
2781 | conflict_info); | |
882fd11a | 2782 | break; |
9c0743fe EN |
2783 | case RENAME_DIR: |
2784 | clean_merge = 1; | |
2785 | if (conflict_rename_dir(o, | |
2786 | conflict_info->pair1, | |
2787 | conflict_info->branch1, | |
2788 | conflict_info->branch2)) | |
2789 | clean_merge = -1; | |
2790 | break; | |
3b130adf EN |
2791 | case RENAME_DELETE: |
2792 | clean_merge = 0; | |
75456f96 JS |
2793 | if (conflict_rename_delete(o, |
2794 | conflict_info->pair1, | |
2795 | conflict_info->branch1, | |
2796 | conflict_info->branch2)) | |
2797 | clean_merge = -1; | |
3b130adf | 2798 | break; |
07413c5a | 2799 | case RENAME_ONE_FILE_TO_TWO: |
07413c5a | 2800 | clean_merge = 0; |
75456f96 JS |
2801 | if (conflict_rename_rename_1to2(o, conflict_info)) |
2802 | clean_merge = -1; | |
07413c5a | 2803 | break; |
461f5041 EN |
2804 | case RENAME_TWO_FILES_TO_ONE: |
2805 | clean_merge = 0; | |
75456f96 JS |
2806 | if (conflict_rename_rename_2to1(o, conflict_info)) |
2807 | clean_merge = -1; | |
07413c5a EN |
2808 | break; |
2809 | default: | |
2810 | entry->processed = 0; | |
2811 | break; | |
2812 | } | |
b4da9d62 | 2813 | } else if (o_oid && (!a_oid || !b_oid)) { |
edd2faf5 | 2814 | /* Case A: Deleted in one */ |
b4da9d62 | 2815 | if ((!a_oid && !b_oid) || |
bc9204d4 JS |
2816 | (!b_oid && blob_unchanged(o, o_oid, o_mode, a_oid, a_mode, normalize, path)) || |
2817 | (!a_oid && blob_unchanged(o, o_oid, o_mode, b_oid, b_mode, normalize, path))) { | |
edd2faf5 EN |
2818 | /* Deleted in both or deleted in one and |
2819 | * unchanged in the other */ | |
b4da9d62 | 2820 | if (a_oid) |
55653a68 | 2821 | output(o, 2, _("Removing %s"), path); |
edd2faf5 | 2822 | /* do not touch working file if it did not exist */ |
b4da9d62 | 2823 | remove_file(o, 1, path, !a_oid); |
edd2faf5 EN |
2824 | } else { |
2825 | /* Modify/delete; deleted side may have put a directory in the way */ | |
edd2faf5 | 2826 | clean_merge = 0; |
75456f96 JS |
2827 | if (handle_modify_delete(o, path, o_oid, o_mode, |
2828 | a_oid, a_mode, b_oid, b_mode)) | |
2829 | clean_merge = -1; | |
3d6b8e88 | 2830 | } |
b4da9d62 | 2831 | } else if ((!o_oid && a_oid && !b_oid) || |
2832 | (!o_oid && !a_oid && b_oid)) { | |
edd2faf5 EN |
2833 | /* Case B: Added in one. */ |
2834 | /* [nothing|directory] -> ([nothing|directory], file) */ | |
2835 | ||
9c0bbb50 EN |
2836 | const char *add_branch; |
2837 | const char *other_branch; | |
2838 | unsigned mode; | |
b4da9d62 | 2839 | const struct object_id *oid; |
9c0bbb50 | 2840 | const char *conf; |
37348937 | 2841 | |
b4da9d62 | 2842 | if (a_oid) { |
9c0bbb50 EN |
2843 | add_branch = o->branch1; |
2844 | other_branch = o->branch2; | |
2845 | mode = a_mode; | |
b4da9d62 | 2846 | oid = a_oid; |
55653a68 | 2847 | conf = _("file/directory"); |
9c0bbb50 EN |
2848 | } else { |
2849 | add_branch = o->branch2; | |
2850 | other_branch = o->branch1; | |
2851 | mode = b_mode; | |
b4da9d62 | 2852 | oid = b_oid; |
55653a68 | 2853 | conf = _("directory/file"); |
9c0bbb50 | 2854 | } |
c641ca67 EN |
2855 | if (dir_in_way(path, |
2856 | !o->call_depth && !S_ISGITLINK(a_mode), | |
2857 | 0)) { | |
3d6b8e88 | 2858 | char *new_path = unique_path(o, path, add_branch); |
9c0bbb50 | 2859 | clean_merge = 0; |
55653a68 JX |
2860 | output(o, 1, _("CONFLICT (%s): There is a directory with name %s in %s. " |
2861 | "Adding %s as %s"), | |
9c0bbb50 | 2862 | conf, path, other_branch, path, new_path); |
75456f96 JS |
2863 | if (update_file(o, 0, oid, mode, new_path)) |
2864 | clean_merge = -1; | |
2865 | else if (o->call_depth) | |
7b1c610f | 2866 | remove_file_from_cache(path); |
3d6b8e88 | 2867 | free(new_path); |
9c0bbb50 | 2868 | } else { |
55653a68 | 2869 | output(o, 2, _("Adding %s"), path); |
35a74abf | 2870 | /* do not overwrite file if already present */ |
75456f96 JS |
2871 | if (update_file_flags(o, oid, mode, path, 1, !a_oid)) |
2872 | clean_merge = -1; | |
9c0bbb50 | 2873 | } |
b4da9d62 | 2874 | } else if (a_oid && b_oid) { |
edd2faf5 EN |
2875 | /* Case C: Added in both (check for same permissions) and */ |
2876 | /* case D: Modified in both, but differently. */ | |
8b026eda | 2877 | clean_merge = merge_content(o, path, |
b4da9d62 | 2878 | o_oid, o_mode, a_oid, a_mode, b_oid, b_mode, |
edd2faf5 | 2879 | NULL); |
b4da9d62 | 2880 | } else if (!o_oid && !a_oid && !b_oid) { |
edd2faf5 EN |
2881 | /* |
2882 | * this entry was deleted altogether. a_mode == 0 means | |
2883 | * we had that path and want to actively remove it. | |
2884 | */ | |
2885 | remove_file(o, 1, path, !a_mode); | |
2886 | } else | |
7e97e100 | 2887 | die("BUG: fatal merge failure, shouldn't happen."); |
37348937 EN |
2888 | |
2889 | return clean_merge; | |
2890 | } | |
2891 | ||
8a2fce18 MV |
2892 | int merge_trees(struct merge_options *o, |
2893 | struct tree *head, | |
9047ebbc MV |
2894 | struct tree *merge, |
2895 | struct tree *common, | |
9047ebbc MV |
2896 | struct tree **result) |
2897 | { | |
2898 | int code, clean; | |
2899 | ||
85e51b78 JH |
2900 | if (o->subtree_shift) { |
2901 | merge = shift_tree_object(head, merge, o->subtree_shift); | |
2902 | common = shift_tree_object(head, common, o->subtree_shift); | |
9047ebbc MV |
2903 | } |
2904 | ||
b4da9d62 | 2905 | if (oid_eq(&common->object.oid, &merge->object.oid)) { |
65170c07 EN |
2906 | struct strbuf sb = STRBUF_INIT; |
2907 | ||
f309e8e7 | 2908 | if (!o->call_depth && index_has_changes(&sb)) { |
65170c07 EN |
2909 | err(o, _("Dirty index: cannot merge (dirty: %s)"), |
2910 | sb.buf); | |
2911 | return 0; | |
2912 | } | |
7560f547 | 2913 | output(o, 0, _("Already up to date!")); |
9047ebbc MV |
2914 | *result = head; |
2915 | return 1; | |
2916 | } | |
2917 | ||
8b026eda | 2918 | code = git_merge_trees(o->call_depth, common, head, merge); |
9047ebbc | 2919 | |
fadd069d JH |
2920 | if (code != 0) { |
2921 | if (show(o, 4) || o->call_depth) | |
bc9204d4 | 2922 | err(o, _("merging of trees %s and %s failed"), |
f2fd0760 | 2923 | oid_to_hex(&head->object.oid), |
2924 | oid_to_hex(&merge->object.oid)); | |
6003303a | 2925 | return -1; |
fadd069d | 2926 | } |
9047ebbc MV |
2927 | |
2928 | if (unmerged_cache()) { | |
f172589e EN |
2929 | struct string_list *entries; |
2930 | struct rename_info re_info; | |
9047ebbc | 2931 | int i; |
fc65b00d KW |
2932 | /* |
2933 | * Only need the hashmap while processing entries, so | |
2934 | * initialize it here and free it when we are done running | |
2935 | * through the entries. Keeping it in the merge_options as | |
2936 | * opposed to decaring a local hashmap is for convenience | |
2937 | * so that we don't have to pass it to around. | |
2938 | */ | |
2939 | hashmap_init(&o->current_file_dir_set, path_hashmap_cmp, NULL, 512); | |
696ee23c MV |
2940 | get_files_dirs(o, head); |
2941 | get_files_dirs(o, merge); | |
9047ebbc MV |
2942 | |
2943 | entries = get_unmerged(); | |
f172589e EN |
2944 | clean = handle_renames(o, common, head, merge, entries, |
2945 | &re_info); | |
6c8647da | 2946 | record_df_conflict_files(o, entries); |
75456f96 | 2947 | if (clean < 0) |
e336bdc5 | 2948 | goto cleanup; |
edd2faf5 | 2949 | for (i = entries->nr-1; 0 <= i; i--) { |
9047ebbc MV |
2950 | const char *path = entries->items[i].string; |
2951 | struct stage_data *e = entries->items[i].util; | |
75456f96 JS |
2952 | if (!e->processed) { |
2953 | int ret = process_entry(o, path, e); | |
2954 | if (!ret) | |
2955 | clean = 0; | |
e336bdc5 KW |
2956 | else if (ret < 0) { |
2957 | clean = ret; | |
2958 | goto cleanup; | |
2959 | } | |
75456f96 | 2960 | } |
9047ebbc | 2961 | } |
7edba4c4 JH |
2962 | for (i = 0; i < entries->nr; i++) { |
2963 | struct stage_data *e = entries->items[i].util; | |
2964 | if (!e->processed) | |
7e97e100 | 2965 | die("BUG: unprocessed path??? %s", |
7edba4c4 JH |
2966 | entries->items[i].string); |
2967 | } | |
9047ebbc | 2968 | |
e336bdc5 | 2969 | cleanup: |
ffc16c49 | 2970 | final_cleanup_renames(&re_info); |
f172589e | 2971 | |
9047ebbc | 2972 | string_list_clear(entries, 1); |
f172589e | 2973 | free(entries); |
9047ebbc | 2974 | |
fc65b00d KW |
2975 | hashmap_free(&o->current_file_dir_set, 1); |
2976 | ||
e336bdc5 KW |
2977 | if (clean < 0) |
2978 | return clean; | |
9047ebbc MV |
2979 | } |
2980 | else | |
2981 | clean = 1; | |
2982 | ||
fbc87eb5 JS |
2983 | if (o->call_depth && !(*result = write_tree_from_memory(o))) |
2984 | return -1; | |
9047ebbc MV |
2985 | |
2986 | return clean; | |
2987 | } | |
2988 | ||
2989 | static struct commit_list *reverse_commit_list(struct commit_list *list) | |
2990 | { | |
2991 | struct commit_list *next = NULL, *current, *backup; | |
2992 | for (current = list; current; current = backup) { | |
2993 | backup = current->next; | |
2994 | current->next = next; | |
2995 | next = current; | |
2996 | } | |
2997 | return next; | |
2998 | } | |
2999 | ||
3000 | /* | |
3001 | * Merge the commits h1 and h2, return the resulting virtual | |
3002 | * commit object and a flag indicating the cleanness of the merge. | |
3003 | */ | |
8a2fce18 MV |
3004 | int merge_recursive(struct merge_options *o, |
3005 | struct commit *h1, | |
9047ebbc | 3006 | struct commit *h2, |
9047ebbc MV |
3007 | struct commit_list *ca, |
3008 | struct commit **result) | |
3009 | { | |
3010 | struct commit_list *iter; | |
3011 | struct commit *merged_common_ancestors; | |
156e1782 | 3012 | struct tree *mrtree; |
9047ebbc MV |
3013 | int clean; |
3014 | ||
8a2fce18 | 3015 | if (show(o, 4)) { |
55653a68 | 3016 | output(o, 4, _("Merging:")); |
5033639c MV |
3017 | output_commit_title(o, h1); |
3018 | output_commit_title(o, h2); | |
9047ebbc MV |
3019 | } |
3020 | ||
3021 | if (!ca) { | |
2ce406cc | 3022 | ca = get_merge_bases(h1, h2); |
9047ebbc MV |
3023 | ca = reverse_commit_list(ca); |
3024 | } | |
3025 | ||
8a2fce18 | 3026 | if (show(o, 5)) { |
e0453cd8 RT |
3027 | unsigned cnt = commit_list_count(ca); |
3028 | ||
3029 | output(o, 5, Q_("found %u common ancestor:", | |
3030 | "found %u common ancestors:", cnt), cnt); | |
9047ebbc | 3031 | for (iter = ca; iter; iter = iter->next) |
5033639c | 3032 | output_commit_title(o, iter->item); |
9047ebbc MV |
3033 | } |
3034 | ||
3035 | merged_common_ancestors = pop_commit(&ca); | |
3036 | if (merged_common_ancestors == NULL) { | |
03f622c8 JN |
3037 | /* if there is no common ancestor, use an empty tree */ |
3038 | struct tree *tree; | |
9047ebbc | 3039 | |
eb0ccfd7 | 3040 | tree = lookup_tree(the_hash_algo->empty_tree); |
9047ebbc MV |
3041 | merged_common_ancestors = make_virtual_commit(tree, "ancestor"); |
3042 | } | |
3043 | ||
3044 | for (iter = ca; iter; iter = iter->next) { | |
8a2fce18 | 3045 | const char *saved_b1, *saved_b2; |
5033639c | 3046 | o->call_depth++; |
9047ebbc MV |
3047 | /* |
3048 | * When the merge fails, the result contains files | |
3049 | * with conflict markers. The cleanness flag is | |
de8946de JS |
3050 | * ignored (unless indicating an error), it was never |
3051 | * actually used, as result of merge_trees has always | |
3052 | * overwritten it: the committed "conflicts" were | |
3053 | * already resolved. | |
9047ebbc MV |
3054 | */ |
3055 | discard_cache(); | |
8a2fce18 MV |
3056 | saved_b1 = o->branch1; |
3057 | saved_b2 = o->branch2; | |
3058 | o->branch1 = "Temporary merge branch 1"; | |
3059 | o->branch2 = "Temporary merge branch 2"; | |
de8946de JS |
3060 | if (merge_recursive(o, merged_common_ancestors, iter->item, |
3061 | NULL, &merged_common_ancestors) < 0) | |
3062 | return -1; | |
8a2fce18 MV |
3063 | o->branch1 = saved_b1; |
3064 | o->branch2 = saved_b2; | |
5033639c | 3065 | o->call_depth--; |
9047ebbc MV |
3066 | |
3067 | if (!merged_common_ancestors) | |
bc9204d4 | 3068 | return err(o, _("merge returned no commit")); |
9047ebbc MV |
3069 | } |
3070 | ||
3071 | discard_cache(); | |
b7fa51da | 3072 | if (!o->call_depth) |
9047ebbc | 3073 | read_cache(); |
9047ebbc | 3074 | |
7ca56aa0 | 3075 | o->ancestor = "merged common ancestors"; |
8a2fce18 MV |
3076 | clean = merge_trees(o, h1->tree, h2->tree, merged_common_ancestors->tree, |
3077 | &mrtree); | |
6999bc70 JS |
3078 | if (clean < 0) { |
3079 | flush_output(o); | |
de8946de | 3080 | return clean; |
6999bc70 | 3081 | } |
9047ebbc | 3082 | |
b7fa51da | 3083 | if (o->call_depth) { |
9047ebbc MV |
3084 | *result = make_virtual_commit(mrtree, "merged tree"); |
3085 | commit_list_insert(h1, &(*result)->parents); | |
3086 | commit_list_insert(h2, &(*result)->parents->next); | |
3087 | } | |
c7d84924 | 3088 | flush_output(o); |
548009c0 JS |
3089 | if (!o->call_depth && o->buffer_output < 2) |
3090 | strbuf_release(&o->obuf); | |
f31027c9 JH |
3091 | if (show(o, 2)) |
3092 | diff_warn_rename_limit("merge.renamelimit", | |
3093 | o->needed_rename_limit, 0); | |
9047ebbc MV |
3094 | return clean; |
3095 | } | |
3096 | ||
4e8161a8 | 3097 | static struct commit *get_ref(const struct object_id *oid, const char *name) |
73118f89 SB |
3098 | { |
3099 | struct object *object; | |
3100 | ||
c251c83d | 3101 | object = deref_tag(parse_object(oid), name, strlen(name)); |
73118f89 SB |
3102 | if (!object) |
3103 | return NULL; | |
3104 | if (object->type == OBJ_TREE) | |
3105 | return make_virtual_commit((struct tree*)object, name); | |
3106 | if (object->type != OBJ_COMMIT) | |
3107 | return NULL; | |
3108 | if (parse_commit((struct commit *)object)) | |
3109 | return NULL; | |
3110 | return (struct commit *)object; | |
3111 | } | |
3112 | ||
8a2fce18 | 3113 | int merge_recursive_generic(struct merge_options *o, |
4e8161a8 | 3114 | const struct object_id *head, |
3115 | const struct object_id *merge, | |
8a2fce18 | 3116 | int num_base_list, |
4e8161a8 | 3117 | const struct object_id **base_list, |
8a2fce18 | 3118 | struct commit **result) |
73118f89 | 3119 | { |
03b86647 | 3120 | int clean; |
837e34eb | 3121 | struct lock_file lock = LOCK_INIT; |
8a2fce18 MV |
3122 | struct commit *head_commit = get_ref(head, o->branch1); |
3123 | struct commit *next_commit = get_ref(merge, o->branch2); | |
73118f89 SB |
3124 | struct commit_list *ca = NULL; |
3125 | ||
3126 | if (base_list) { | |
3127 | int i; | |
8a2fce18 | 3128 | for (i = 0; i < num_base_list; ++i) { |
73118f89 | 3129 | struct commit *base; |
4e8161a8 | 3130 | if (!(base = get_ref(base_list[i], oid_to_hex(base_list[i])))) |
bc9204d4 | 3131 | return err(o, _("Could not parse object '%s'"), |
4e8161a8 | 3132 | oid_to_hex(base_list[i])); |
73118f89 SB |
3133 | commit_list_insert(base, &ca); |
3134 | } | |
3135 | } | |
3136 | ||
837e34eb | 3137 | hold_locked_index(&lock, LOCK_DIE_ON_ERROR); |
8a2fce18 MV |
3138 | clean = merge_recursive(o, head_commit, next_commit, ca, |
3139 | result); | |
51d3f43d MÅ |
3140 | if (clean < 0) { |
3141 | rollback_lock_file(&lock); | |
de8946de | 3142 | return clean; |
51d3f43d | 3143 | } |
de8946de | 3144 | |
61000814 MÅ |
3145 | if (write_locked_index(&the_index, &lock, |
3146 | COMMIT_LOCK | SKIP_IF_UNCHANGED)) | |
bc9204d4 | 3147 | return err(o, _("Unable to write index.")); |
73118f89 SB |
3148 | |
3149 | return clean ? 0 : 1; | |
3150 | } | |
3151 | ||
0e7bcb1b | 3152 | static void merge_recursive_config(struct merge_options *o) |
9047ebbc | 3153 | { |
0e7bcb1b TA |
3154 | git_config_get_int("merge.verbosity", &o->verbosity); |
3155 | git_config_get_int("diff.renamelimit", &o->diff_rename_limit); | |
3156 | git_config_get_int("merge.renamelimit", &o->merge_rename_limit); | |
3157 | git_config(git_xmerge_config, NULL); | |
9047ebbc MV |
3158 | } |
3159 | ||
8a2fce18 | 3160 | void init_merge_options(struct merge_options *o) |
9047ebbc | 3161 | { |
80486220 | 3162 | const char *merge_verbosity; |
8a2fce18 MV |
3163 | memset(o, 0, sizeof(struct merge_options)); |
3164 | o->verbosity = 2; | |
3165 | o->buffer_output = 1; | |
3166 | o->diff_rename_limit = -1; | |
3167 | o->merge_rename_limit = -1; | |
7610fa57 | 3168 | o->renormalize = 0; |
d2b11eca | 3169 | o->detect_rename = 1; |
0e7bcb1b | 3170 | merge_recursive_config(o); |
80486220 AO |
3171 | merge_verbosity = getenv("GIT_MERGE_VERBOSITY"); |
3172 | if (merge_verbosity) | |
3173 | o->verbosity = strtol(merge_verbosity, NULL, 10); | |
8a2fce18 MV |
3174 | if (o->verbosity >= 5) |
3175 | o->buffer_output = 0; | |
c7d84924 | 3176 | strbuf_init(&o->obuf, 0); |
f93d7c6f | 3177 | string_list_init(&o->df_conflict_file_set, 1); |
9047ebbc | 3178 | } |
635a7bb1 JN |
3179 | |
3180 | int parse_merge_opt(struct merge_options *o, const char *s) | |
3181 | { | |
95b567c7 JK |
3182 | const char *arg; |
3183 | ||
635a7bb1 JN |
3184 | if (!s || !*s) |
3185 | return -1; | |
3186 | if (!strcmp(s, "ours")) | |
3187 | o->recursive_variant = MERGE_RECURSIVE_OURS; | |
3188 | else if (!strcmp(s, "theirs")) | |
3189 | o->recursive_variant = MERGE_RECURSIVE_THEIRS; | |
3190 | else if (!strcmp(s, "subtree")) | |
3191 | o->subtree_shift = ""; | |
95b567c7 JK |
3192 | else if (skip_prefix(s, "subtree=", &arg)) |
3193 | o->subtree_shift = arg; | |
58a1ece4 | 3194 | else if (!strcmp(s, "patience")) |
307ab20b | 3195 | o->xdl_opts = DIFF_WITH_ALG(o, PATIENCE_DIFF); |
8c912eea | 3196 | else if (!strcmp(s, "histogram")) |
307ab20b | 3197 | o->xdl_opts = DIFF_WITH_ALG(o, HISTOGRAM_DIFF); |
95b567c7 JK |
3198 | else if (skip_prefix(s, "diff-algorithm=", &arg)) { |
3199 | long value = parse_algorithm_value(arg); | |
07924d4d MP |
3200 | if (value < 0) |
3201 | return -1; | |
3202 | /* clear out previous settings */ | |
3203 | DIFF_XDL_CLR(o, NEED_MINIMAL); | |
3204 | o->xdl_opts &= ~XDF_DIFF_ALGORITHM_MASK; | |
3205 | o->xdl_opts |= value; | |
3206 | } | |
4e5dd044 | 3207 | else if (!strcmp(s, "ignore-space-change")) |
c2d4b4cd | 3208 | DIFF_XDL_SET(o, IGNORE_WHITESPACE_CHANGE); |
4e5dd044 | 3209 | else if (!strcmp(s, "ignore-all-space")) |
c2d4b4cd | 3210 | DIFF_XDL_SET(o, IGNORE_WHITESPACE); |
4e5dd044 | 3211 | else if (!strcmp(s, "ignore-space-at-eol")) |
c2d4b4cd | 3212 | DIFF_XDL_SET(o, IGNORE_WHITESPACE_AT_EOL); |
e9282f02 JH |
3213 | else if (!strcmp(s, "ignore-cr-at-eol")) |
3214 | DIFF_XDL_SET(o, IGNORE_CR_AT_EOL); | |
635a7bb1 JN |
3215 | else if (!strcmp(s, "renormalize")) |
3216 | o->renormalize = 1; | |
3217 | else if (!strcmp(s, "no-renormalize")) | |
3218 | o->renormalize = 0; | |
d2b11eca FGA |
3219 | else if (!strcmp(s, "no-renames")) |
3220 | o->detect_rename = 0; | |
87892f60 | 3221 | else if (!strcmp(s, "find-renames")) { |
1b47ad16 | 3222 | o->detect_rename = 1; |
87892f60 FGA |
3223 | o->rename_score = 0; |
3224 | } | |
1b47ad16 FGA |
3225 | else if (skip_prefix(s, "find-renames=", &arg) || |
3226 | skip_prefix(s, "rename-threshold=", &arg)) { | |
95b567c7 | 3227 | if ((o->rename_score = parse_rename_score(&arg)) == -1 || *arg != 0) |
10ae7526 | 3228 | return -1; |
d2b11eca | 3229 | o->detect_rename = 1; |
10ae7526 | 3230 | } |
635a7bb1 JN |
3231 | else |
3232 | return -1; | |
3233 | return 0; | |
3234 | } |