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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 | 10 | #include "cache-tree.h" |
cbd53a21 | 11 | #include "object-store.h" |
109cd76d | 12 | #include "repository.h" |
9047ebbc MV |
13 | #include "commit.h" |
14 | #include "blob.h" | |
15 | #include "builtin.h" | |
16 | #include "tree-walk.h" | |
17 | #include "diff.h" | |
18 | #include "diffcore.h" | |
19 | #include "tag.h" | |
14ba97f8 | 20 | #include "alloc.h" |
9047ebbc MV |
21 | #include "unpack-trees.h" |
22 | #include "string-list.h" | |
23 | #include "xdiff-interface.h" | |
24 | #include "ll-merge.h" | |
9047ebbc MV |
25 | #include "attr.h" |
26 | #include "merge-recursive.h" | |
9800c0df | 27 | #include "dir.h" |
68d03e4a | 28 | #include "submodule.h" |
18cfc088 | 29 | #include "revision.h" |
64043556 | 30 | #include "commit-reach.h" |
9047ebbc | 31 | |
fc65b00d KW |
32 | struct path_hashmap_entry { |
33 | struct hashmap_entry e; | |
34 | char path[FLEX_ARRAY]; | |
35 | }; | |
36 | ||
37 | static int path_hashmap_cmp(const void *cmp_data, | |
38 | const void *entry, | |
39 | const void *entry_or_key, | |
40 | const void *keydata) | |
41 | { | |
42 | const struct path_hashmap_entry *a = entry; | |
43 | const struct path_hashmap_entry *b = entry_or_key; | |
44 | const char *key = keydata; | |
45 | ||
46 | if (ignore_case) | |
47 | return strcasecmp(a->path, key ? key : b->path); | |
48 | else | |
49 | return strcmp(a->path, key ? key : b->path); | |
50 | } | |
51 | ||
52 | static unsigned int path_hash(const char *path) | |
53 | { | |
54 | return ignore_case ? strihash(path) : strhash(path); | |
55 | } | |
56 | ||
7c0a6c8e EN |
57 | /* |
58 | * For dir_rename_entry, directory names are stored as a full path from the | |
59 | * toplevel of the repository and do not include a trailing '/'. Also: | |
60 | * | |
61 | * dir: original name of directory being renamed | |
62 | * non_unique_new_dir: if true, could not determine new_dir | |
63 | * new_dir: final name of directory being renamed | |
64 | * possible_new_dirs: temporary used to help determine new_dir; see comments | |
65 | * in get_directory_renames() for details | |
66 | */ | |
67 | struct dir_rename_entry { | |
68 | struct hashmap_entry ent; /* must be the first member! */ | |
69 | char *dir; | |
70 | unsigned non_unique_new_dir:1; | |
71 | struct strbuf new_dir; | |
72 | struct string_list possible_new_dirs; | |
73 | }; | |
74 | ||
7fe40b88 EN |
75 | static struct dir_rename_entry *dir_rename_find_entry(struct hashmap *hashmap, |
76 | char *dir) | |
77 | { | |
78 | struct dir_rename_entry key; | |
79 | ||
80 | if (dir == NULL) | |
81 | return NULL; | |
82 | hashmap_entry_init(&key, strhash(dir)); | |
83 | key.dir = dir; | |
84 | return hashmap_get(hashmap, &key, NULL); | |
85 | } | |
86 | ||
87 | static int dir_rename_cmp(const void *unused_cmp_data, | |
88 | const void *entry, | |
89 | const void *entry_or_key, | |
90 | const void *unused_keydata) | |
91 | { | |
92 | const struct dir_rename_entry *e1 = entry; | |
93 | const struct dir_rename_entry *e2 = entry_or_key; | |
94 | ||
95 | return strcmp(e1->dir, e2->dir); | |
96 | } | |
97 | ||
98 | static void dir_rename_init(struct hashmap *map) | |
99 | { | |
100 | hashmap_init(map, dir_rename_cmp, NULL, 0); | |
101 | } | |
102 | ||
103 | static void dir_rename_entry_init(struct dir_rename_entry *entry, | |
104 | char *directory) | |
105 | { | |
106 | hashmap_entry_init(entry, strhash(directory)); | |
107 | entry->dir = directory; | |
108 | entry->non_unique_new_dir = 0; | |
109 | strbuf_init(&entry->new_dir, 0); | |
110 | string_list_init(&entry->possible_new_dirs, 0); | |
111 | } | |
112 | ||
7c0a6c8e EN |
113 | struct collision_entry { |
114 | struct hashmap_entry ent; /* must be the first member! */ | |
115 | char *target_file; | |
116 | struct string_list source_files; | |
117 | unsigned reported_already:1; | |
118 | }; | |
119 | ||
e95ab70a EN |
120 | static struct collision_entry *collision_find_entry(struct hashmap *hashmap, |
121 | char *target_file) | |
122 | { | |
123 | struct collision_entry key; | |
124 | ||
125 | hashmap_entry_init(&key, strhash(target_file)); | |
126 | key.target_file = target_file; | |
127 | return hashmap_get(hashmap, &key, NULL); | |
128 | } | |
129 | ||
130 | static int collision_cmp(void *unused_cmp_data, | |
131 | const struct collision_entry *e1, | |
132 | const struct collision_entry *e2, | |
133 | const void *unused_keydata) | |
134 | { | |
135 | return strcmp(e1->target_file, e2->target_file); | |
136 | } | |
137 | ||
138 | static void collision_init(struct hashmap *map) | |
139 | { | |
140 | hashmap_init(map, (hashmap_cmp_fn) collision_cmp, NULL, 0); | |
141 | } | |
142 | ||
259ccb6c | 143 | static void flush_output(struct merge_options *opt) |
bc9204d4 | 144 | { |
259ccb6c EN |
145 | if (opt->buffer_output < 2 && opt->obuf.len) { |
146 | fputs(opt->obuf.buf, stdout); | |
147 | strbuf_reset(&opt->obuf); | |
bc9204d4 JS |
148 | } |
149 | } | |
150 | ||
259ccb6c | 151 | static int err(struct merge_options *opt, const char *err, ...) |
bc9204d4 JS |
152 | { |
153 | va_list params; | |
154 | ||
259ccb6c EN |
155 | if (opt->buffer_output < 2) |
156 | flush_output(opt); | |
f1e2426b | 157 | else { |
259ccb6c EN |
158 | strbuf_complete(&opt->obuf, '\n'); |
159 | strbuf_addstr(&opt->obuf, "error: "); | |
f1e2426b | 160 | } |
bc9204d4 | 161 | va_start(params, err); |
259ccb6c | 162 | strbuf_vaddf(&opt->obuf, err, params); |
bc9204d4 | 163 | va_end(params); |
259ccb6c EN |
164 | if (opt->buffer_output > 1) |
165 | strbuf_addch(&opt->obuf, '\n'); | |
f1e2426b | 166 | else { |
259ccb6c EN |
167 | error("%s", opt->obuf.buf); |
168 | strbuf_reset(&opt->obuf); | |
f1e2426b | 169 | } |
bc9204d4 JS |
170 | |
171 | return -1; | |
172 | } | |
173 | ||
d7cf3a96 NTND |
174 | static struct tree *shift_tree_object(struct repository *repo, |
175 | struct tree *one, struct tree *two, | |
85e51b78 | 176 | const char *subtree_shift) |
9047ebbc | 177 | { |
f2fd0760 | 178 | struct object_id shifted; |
9047ebbc | 179 | |
85e51b78 | 180 | if (!*subtree_shift) { |
90d34051 | 181 | shift_tree(repo, &one->object.oid, &two->object.oid, &shifted, 0); |
85e51b78 | 182 | } else { |
90d34051 | 183 | shift_tree_by(repo, &one->object.oid, &two->object.oid, &shifted, |
85e51b78 JH |
184 | subtree_shift); |
185 | } | |
4a7e27e9 | 186 | if (oideq(&two->object.oid, &shifted)) |
9047ebbc | 187 | return two; |
d7cf3a96 | 188 | return lookup_tree(repo, &shifted); |
9047ebbc MV |
189 | } |
190 | ||
a133c40b NTND |
191 | static inline void set_commit_tree(struct commit *c, struct tree *t) |
192 | { | |
193 | c->maybe_tree = t; | |
194 | } | |
195 | ||
d7cf3a96 NTND |
196 | static struct commit *make_virtual_commit(struct repository *repo, |
197 | struct tree *tree, | |
198 | const char *comment) | |
9047ebbc | 199 | { |
d7cf3a96 | 200 | struct commit *commit = alloc_commit_node(repo); |
ae8e4c9c | 201 | |
a2571653 | 202 | set_merge_remote_desc(commit, comment, (struct object *)commit); |
a133c40b | 203 | set_commit_tree(commit, tree); |
9047ebbc MV |
204 | commit->object.parsed = 1; |
205 | return commit; | |
206 | } | |
207 | ||
208 | /* | |
209 | * Since we use get_tree_entry(), which does not put the read object into | |
210 | * the object pool, we cannot rely on a == b. | |
211 | */ | |
b4da9d62 | 212 | static int oid_eq(const struct object_id *a, const struct object_id *b) |
9047ebbc MV |
213 | { |
214 | if (!a && !b) | |
215 | return 2; | |
4a7e27e9 | 216 | return a && b && oideq(a, b); |
9047ebbc MV |
217 | } |
218 | ||
25c39363 EN |
219 | enum rename_type { |
220 | RENAME_NORMAL = 0, | |
5455c338 | 221 | RENAME_VIA_DIR, |
7f867165 | 222 | RENAME_ADD, |
25c39363 | 223 | RENAME_DELETE, |
4f66dade | 224 | RENAME_ONE_FILE_TO_ONE, |
461f5041 EN |
225 | RENAME_ONE_FILE_TO_TWO, |
226 | RENAME_TWO_FILES_TO_ONE | |
25c39363 EN |
227 | }; |
228 | ||
9047ebbc MV |
229 | /* |
230 | * Since we want to write the index eventually, we cannot reuse the index | |
231 | * for these (temporary) data. | |
232 | */ | |
9cba13ca | 233 | struct stage_data { |
8daec1df | 234 | struct diff_filespec stages[4]; /* mostly for oid & mode; maybe path */ |
4f66dade | 235 | struct rename_conflict_info *rename_conflict_info; |
9047ebbc MV |
236 | unsigned processed:1; |
237 | }; | |
238 | ||
967d6be7 | 239 | struct rename { |
6d169fd3 | 240 | unsigned processed:1; |
967d6be7 | 241 | struct diff_filepair *pair; |
c336ab85 | 242 | const char *branch; /* branch that the rename occurred on */ |
6d169fd3 EN |
243 | /* |
244 | * If directory rename detection affected this rename, what was its | |
245 | * original type ('A' or 'R') and it's original destination before | |
246 | * the directory rename (otherwise, '\0' and NULL for these two vars). | |
247 | */ | |
248 | char dir_rename_original_type; | |
249 | char *dir_rename_original_dest; | |
967d6be7 EN |
250 | /* |
251 | * Purpose of src_entry and dst_entry: | |
252 | * | |
253 | * If 'before' is renamed to 'after' then src_entry will contain | |
254 | * the versions of 'before' from the merge_base, HEAD, and MERGE in | |
255 | * stages 1, 2, and 3; dst_entry will contain the respective | |
256 | * versions of 'after' in corresponding locations. Thus, we have a | |
257 | * total of six modes and oids, though some will be null. (Stage 0 | |
258 | * is ignored; we're interested in handling conflicts.) | |
259 | * | |
260 | * Since we don't turn on break-rewrites by default, neither | |
261 | * src_entry nor dst_entry can have all three of their stages have | |
262 | * non-null oids, meaning at most four of the six will be non-null. | |
263 | * Also, since this is a rename, both src_entry and dst_entry will | |
264 | * have at least one non-null oid, meaning at least two will be | |
265 | * non-null. Of the six oids, a typical rename will have three be | |
266 | * non-null. Only two implies a rename/delete, and four implies a | |
267 | * rename/add. | |
268 | */ | |
269 | struct stage_data *src_entry; | |
270 | struct stage_data *dst_entry; | |
967d6be7 EN |
271 | }; |
272 | ||
273 | struct rename_conflict_info { | |
274 | enum rename_type rename_type; | |
e9cd1b5c EN |
275 | struct rename *ren1; |
276 | struct rename *ren2; | |
967d6be7 EN |
277 | }; |
278 | ||
4f66dade | 279 | static inline void setup_rename_conflict_info(enum rename_type rename_type, |
e9cd1b5c EN |
280 | struct merge_options *opt, |
281 | struct rename *ren1, | |
c336ab85 | 282 | struct rename *ren2) |
25c39363 | 283 | { |
4f445453 EN |
284 | struct rename_conflict_info *ci; |
285 | ||
286 | /* | |
287 | * When we have two renames involved, it's easiest to get the | |
288 | * correct things into stage 2 and 3, and to make sure that the | |
289 | * content merge puts HEAD before the other branch if we just | |
259ccb6c | 290 | * ensure that branch1 == opt->branch1. So, simply flip arguments |
4f445453 EN |
291 | * around if we don't have that. |
292 | */ | |
c336ab85 EN |
293 | if (ren2 && ren1->branch != opt->branch1) { |
294 | setup_rename_conflict_info(rename_type, opt, ren2, ren1); | |
4f445453 EN |
295 | return; |
296 | } | |
297 | ||
298 | ci = xcalloc(1, sizeof(struct rename_conflict_info)); | |
25c39363 | 299 | ci->rename_type = rename_type; |
e9cd1b5c EN |
300 | ci->ren1 = ren1; |
301 | ci->ren2 = ren2; | |
25c39363 | 302 | |
e9cd1b5c EN |
303 | ci->ren1->dst_entry->processed = 0; |
304 | ci->ren1->dst_entry->rename_conflict_info = ci; | |
e9cd1b5c EN |
305 | if (ren2) { |
306 | ci->ren2->dst_entry->rename_conflict_info = ci; | |
25c39363 EN |
307 | } |
308 | } | |
309 | ||
259ccb6c | 310 | static int show(struct merge_options *opt, int v) |
9047ebbc | 311 | { |
259ccb6c | 312 | return (!opt->call_depth && opt->verbosity >= v) || opt->verbosity >= 5; |
9047ebbc MV |
313 | } |
314 | ||
28bea9e5 | 315 | __attribute__((format (printf, 3, 4))) |
259ccb6c | 316 | static void output(struct merge_options *opt, int v, const char *fmt, ...) |
9047ebbc | 317 | { |
9047ebbc MV |
318 | va_list ap; |
319 | ||
259ccb6c | 320 | if (!show(opt, v)) |
9047ebbc MV |
321 | return; |
322 | ||
259ccb6c | 323 | strbuf_addchars(&opt->obuf, ' ', opt->call_depth * 2); |
9047ebbc MV |
324 | |
325 | va_start(ap, fmt); | |
259ccb6c | 326 | strbuf_vaddf(&opt->obuf, fmt, ap); |
9047ebbc MV |
327 | va_end(ap); |
328 | ||
259ccb6c EN |
329 | strbuf_addch(&opt->obuf, '\n'); |
330 | if (!opt->buffer_output) | |
331 | flush_output(opt); | |
9047ebbc MV |
332 | } |
333 | ||
259ccb6c | 334 | static void output_commit_title(struct merge_options *opt, struct commit *commit) |
9047ebbc | 335 | { |
e2e5ac23 NTND |
336 | struct merge_remote_desc *desc; |
337 | ||
259ccb6c | 338 | strbuf_addchars(&opt->obuf, ' ', opt->call_depth * 2); |
e2e5ac23 NTND |
339 | desc = merge_remote_util(commit); |
340 | if (desc) | |
259ccb6c | 341 | strbuf_addf(&opt->obuf, "virtual %s\n", desc->name); |
9047ebbc | 342 | else { |
259ccb6c | 343 | strbuf_add_unique_abbrev(&opt->obuf, &commit->object.oid, |
a94bb683 | 344 | DEFAULT_ABBREV); |
259ccb6c | 345 | strbuf_addch(&opt->obuf, ' '); |
9047ebbc | 346 | if (parse_commit(commit) != 0) |
259ccb6c | 347 | strbuf_addstr(&opt->obuf, _("(bad commit)\n")); |
9047ebbc | 348 | else { |
49b7120e | 349 | const char *title; |
8597ea3a | 350 | const char *msg = get_commit_buffer(commit, NULL); |
bc6b8fc1 | 351 | int len = find_commit_subject(msg, &title); |
49b7120e | 352 | if (len) |
259ccb6c | 353 | strbuf_addf(&opt->obuf, "%.*s\n", len, title); |
bc6b8fc1 | 354 | unuse_commit_buffer(commit, msg); |
9047ebbc MV |
355 | } |
356 | } | |
259ccb6c | 357 | flush_output(opt); |
9047ebbc MV |
358 | } |
359 | ||
259ccb6c | 360 | static int add_cacheinfo(struct merge_options *opt, |
8daec1df | 361 | const struct diff_filespec *blob, |
d90e759f | 362 | const char *path, int stage, int refresh, int options) |
9047ebbc | 363 | { |
259ccb6c | 364 | struct index_state *istate = opt->repo->index; |
9047ebbc | 365 | struct cache_entry *ce; |
1335d76e JH |
366 | int ret; |
367 | ||
8daec1df | 368 | ce = make_cache_entry(istate, blob->mode, &blob->oid, path, stage, 0); |
9047ebbc | 369 | if (!ce) |
259ccb6c | 370 | return err(opt, _("add_cacheinfo failed for path '%s'; merge aborting."), path); |
1335d76e | 371 | |
0d6caa2d | 372 | ret = add_index_entry(istate, ce, options); |
1335d76e JH |
373 | if (refresh) { |
374 | struct cache_entry *nce; | |
375 | ||
0d6caa2d NTND |
376 | nce = refresh_cache_entry(istate, ce, |
377 | CE_MATCH_REFRESH | CE_MATCH_IGNORE_MISSING); | |
55e9f0e5 | 378 | if (!nce) |
259ccb6c | 379 | return err(opt, _("add_cacheinfo failed to refresh for path '%s'; merge aborting."), path); |
1335d76e | 380 | if (nce != ce) |
0d6caa2d | 381 | ret = add_index_entry(istate, nce, options); |
1335d76e JH |
382 | } |
383 | return ret; | |
9047ebbc MV |
384 | } |
385 | ||
7c0a6c8e EN |
386 | static inline int merge_detect_rename(struct merge_options *opt) |
387 | { | |
388 | return opt->merge_detect_rename >= 0 ? opt->merge_detect_rename : | |
389 | opt->diff_detect_rename >= 0 ? opt->diff_detect_rename : 1; | |
390 | } | |
391 | ||
9047ebbc MV |
392 | static void init_tree_desc_from_tree(struct tree_desc *desc, struct tree *tree) |
393 | { | |
394 | parse_tree(tree); | |
395 | init_tree_desc(desc, tree->buffer, tree->size); | |
396 | } | |
397 | ||
259ccb6c | 398 | static int unpack_trees_start(struct merge_options *opt, |
3f1c1c36 EN |
399 | struct tree *common, |
400 | struct tree *head, | |
401 | struct tree *merge) | |
9047ebbc MV |
402 | { |
403 | int rc; | |
404 | struct tree_desc t[3]; | |
a35edc84 | 405 | struct index_state tmp_index = { NULL }; |
9047ebbc | 406 | |
259ccb6c EN |
407 | memset(&opt->unpack_opts, 0, sizeof(opt->unpack_opts)); |
408 | if (opt->call_depth) | |
409 | opt->unpack_opts.index_only = 1; | |
9047ebbc | 410 | else |
259ccb6c EN |
411 | opt->unpack_opts.update = 1; |
412 | opt->unpack_opts.merge = 1; | |
413 | opt->unpack_opts.head_idx = 2; | |
414 | opt->unpack_opts.fn = threeway_merge; | |
415 | opt->unpack_opts.src_index = opt->repo->index; | |
416 | opt->unpack_opts.dst_index = &tmp_index; | |
417 | opt->unpack_opts.aggressive = !merge_detect_rename(opt); | |
418 | setup_unpack_trees_porcelain(&opt->unpack_opts, "merge"); | |
9047ebbc MV |
419 | |
420 | init_tree_desc_from_tree(t+0, common); | |
421 | init_tree_desc_from_tree(t+1, head); | |
422 | init_tree_desc_from_tree(t+2, merge); | |
423 | ||
259ccb6c EN |
424 | rc = unpack_trees(3, t, &opt->unpack_opts); |
425 | cache_tree_free(&opt->repo->index->cache_tree); | |
a35edc84 | 426 | |
64b1abe9 | 427 | /* |
259ccb6c EN |
428 | * Update opt->repo->index to match the new results, AFTER saving a copy |
429 | * in opt->orig_index. Update src_index to point to the saved copy. | |
a35edc84 EN |
430 | * (verify_uptodate() checks src_index, and the original index is |
431 | * the one that had the necessary modification timestamps.) | |
64b1abe9 | 432 | */ |
259ccb6c EN |
433 | opt->orig_index = *opt->repo->index; |
434 | *opt->repo->index = tmp_index; | |
435 | opt->unpack_opts.src_index = &opt->orig_index; | |
a35edc84 | 436 | |
9047ebbc MV |
437 | return rc; |
438 | } | |
439 | ||
259ccb6c | 440 | static void unpack_trees_finish(struct merge_options *opt) |
3f1c1c36 | 441 | { |
259ccb6c EN |
442 | discard_index(&opt->orig_index); |
443 | clear_unpack_trees_porcelain(&opt->unpack_opts); | |
3f1c1c36 EN |
444 | } |
445 | ||
df46d77e | 446 | static int save_files_dirs(const struct object_id *oid, |
d90e759f EN |
447 | struct strbuf *base, const char *path, |
448 | unsigned int mode, int stage, void *context) | |
9047ebbc | 449 | { |
fc65b00d | 450 | struct path_hashmap_entry *entry; |
6a0b0b6d | 451 | int baselen = base->len; |
259ccb6c | 452 | struct merge_options *opt = context; |
696ee23c | 453 | |
6a0b0b6d | 454 | strbuf_addstr(base, path); |
9047ebbc | 455 | |
fc65b00d KW |
456 | FLEX_ALLOC_MEM(entry, path, base->buf, base->len); |
457 | hashmap_entry_init(entry, path_hash(entry->path)); | |
259ccb6c | 458 | hashmap_add(&opt->current_file_dir_set, entry); |
9047ebbc | 459 | |
6a0b0b6d | 460 | strbuf_setlen(base, baselen); |
d3bee161 | 461 | return (S_ISDIR(mode) ? READ_TREE_RECURSIVE : 0); |
9047ebbc MV |
462 | } |
463 | ||
259ccb6c | 464 | static void get_files_dirs(struct merge_options *opt, struct tree *tree) |
9047ebbc | 465 | { |
f0096c06 | 466 | struct pathspec match_all; |
9a087274 | 467 | memset(&match_all, 0, sizeof(match_all)); |
34e7771b | 468 | read_tree_recursive(opt->repo, tree, "", 0, 0, |
259ccb6c | 469 | &match_all, save_files_dirs, opt); |
9047ebbc MV |
470 | } |
471 | ||
34e7771b NTND |
472 | static int get_tree_entry_if_blob(struct repository *r, |
473 | const struct object_id *tree, | |
5b047ac0 | 474 | const char *path, |
8daec1df | 475 | struct diff_filespec *dfs) |
5b047ac0 EN |
476 | { |
477 | int ret; | |
478 | ||
34e7771b | 479 | ret = get_tree_entry(r, tree, path, &dfs->oid, &dfs->mode); |
8daec1df EN |
480 | if (S_ISDIR(dfs->mode)) { |
481 | oidcpy(&dfs->oid, &null_oid); | |
482 | dfs->mode = 0; | |
5b047ac0 EN |
483 | } |
484 | return ret; | |
485 | } | |
486 | ||
9047ebbc MV |
487 | /* |
488 | * Returns an index_entry instance which doesn't have to correspond to | |
489 | * a real cache entry in Git's index. | |
490 | */ | |
34e7771b NTND |
491 | static struct stage_data *insert_stage_data(struct repository *r, |
492 | const char *path, | |
9047ebbc MV |
493 | struct tree *o, struct tree *a, struct tree *b, |
494 | struct string_list *entries) | |
495 | { | |
496 | struct string_list_item *item; | |
497 | struct stage_data *e = xcalloc(1, sizeof(struct stage_data)); | |
34e7771b NTND |
498 | get_tree_entry_if_blob(r, &o->object.oid, path, &e->stages[1]); |
499 | get_tree_entry_if_blob(r, &a->object.oid, path, &e->stages[2]); | |
500 | get_tree_entry_if_blob(r, &b->object.oid, path, &e->stages[3]); | |
78a395d3 | 501 | item = string_list_insert(entries, path); |
9047ebbc MV |
502 | item->util = e; |
503 | return e; | |
504 | } | |
505 | ||
506 | /* | |
507 | * Create a dictionary mapping file names to stage_data objects. The | |
508 | * dictionary contains one entry for every path with a non-zero stage entry. | |
509 | */ | |
0d6caa2d | 510 | static struct string_list *get_unmerged(struct index_state *istate) |
9047ebbc MV |
511 | { |
512 | struct string_list *unmerged = xcalloc(1, sizeof(struct string_list)); | |
513 | int i; | |
514 | ||
515 | unmerged->strdup_strings = 1; | |
516 | ||
0d6caa2d | 517 | for (i = 0; i < istate->cache_nr; i++) { |
9047ebbc MV |
518 | struct string_list_item *item; |
519 | struct stage_data *e; | |
0d6caa2d | 520 | const struct cache_entry *ce = istate->cache[i]; |
9047ebbc MV |
521 | if (!ce_stage(ce)) |
522 | continue; | |
523 | ||
e8c8b713 | 524 | item = string_list_lookup(unmerged, ce->name); |
9047ebbc | 525 | if (!item) { |
78a395d3 | 526 | item = string_list_insert(unmerged, ce->name); |
9047ebbc MV |
527 | item->util = xcalloc(1, sizeof(struct stage_data)); |
528 | } | |
529 | e = item->util; | |
530 | e->stages[ce_stage(ce)].mode = ce->ce_mode; | |
99d1a986 | 531 | oidcpy(&e->stages[ce_stage(ce)].oid, &ce->oid); |
9047ebbc MV |
532 | } |
533 | ||
534 | return unmerged; | |
535 | } | |
536 | ||
fa6ca111 | 537 | static int string_list_df_name_compare(const char *one, const char *two) |
ef02b317 | 538 | { |
fa6ca111 NTND |
539 | int onelen = strlen(one); |
540 | int twolen = strlen(two); | |
f0fd4d05 EN |
541 | /* |
542 | * Here we only care that entries for D/F conflicts are | |
543 | * adjacent, in particular with the file of the D/F conflict | |
544 | * appearing before files below the corresponding directory. | |
545 | * The order of the rest of the list is irrelevant for us. | |
ef02b317 | 546 | * |
f0fd4d05 EN |
547 | * To achieve this, we sort with df_name_compare and provide |
548 | * the mode S_IFDIR so that D/F conflicts will sort correctly. | |
549 | * We use the mode S_IFDIR for everything else for simplicity, | |
550 | * since in other cases any changes in their order due to | |
551 | * sorting cause no problems for us. | |
552 | */ | |
fa6ca111 NTND |
553 | int cmp = df_name_compare(one, onelen, S_IFDIR, |
554 | two, twolen, S_IFDIR); | |
f0fd4d05 EN |
555 | /* |
556 | * Now that 'foo' and 'foo/bar' compare equal, we have to make sure | |
557 | * that 'foo' comes before 'foo/bar'. | |
ef02b317 | 558 | */ |
f0fd4d05 EN |
559 | if (cmp) |
560 | return cmp; | |
561 | return onelen - twolen; | |
562 | } | |
563 | ||
259ccb6c | 564 | static void record_df_conflict_files(struct merge_options *opt, |
70cc3d36 | 565 | struct string_list *entries) |
ef02b317 | 566 | { |
70cc3d36 | 567 | /* If there is a D/F conflict and the file for such a conflict |
2d6bad91 | 568 | * currently exists in the working tree, we want to allow it to be |
edd2faf5 EN |
569 | * removed to make room for the corresponding directory if needed. |
570 | * The files underneath the directories of such D/F conflicts will | |
571 | * be processed before the corresponding file involved in the D/F | |
572 | * conflict. If the D/F directory ends up being removed by the | |
573 | * merge, then we won't have to touch the D/F file. If the D/F | |
574 | * directory needs to be written to the working copy, then the D/F | |
575 | * file will simply be removed (in make_room_for_path()) to make | |
576 | * room for the necessary paths. Note that if both the directory | |
577 | * and the file need to be present, then the D/F file will be | |
578 | * reinstated with a new unique name at the time it is processed. | |
ef02b317 | 579 | */ |
af4941d4 | 580 | struct string_list df_sorted_entries = STRING_LIST_INIT_NODUP; |
ef02b317 | 581 | const char *last_file = NULL; |
c8516500 | 582 | int last_len = 0; |
ef02b317 EN |
583 | int i; |
584 | ||
0b30e812 EN |
585 | /* |
586 | * If we're merging merge-bases, we don't want to bother with | |
587 | * any working directory changes. | |
588 | */ | |
259ccb6c | 589 | if (opt->call_depth) |
0b30e812 EN |
590 | return; |
591 | ||
f0fd4d05 | 592 | /* Ensure D/F conflicts are adjacent in the entries list. */ |
ef02b317 | 593 | for (i = 0; i < entries->nr; i++) { |
f701aae0 EN |
594 | struct string_list_item *next = &entries->items[i]; |
595 | string_list_append(&df_sorted_entries, next->string)->util = | |
596 | next->util; | |
597 | } | |
fa6ca111 NTND |
598 | df_sorted_entries.cmp = string_list_df_name_compare; |
599 | string_list_sort(&df_sorted_entries); | |
f0fd4d05 | 600 | |
259ccb6c | 601 | string_list_clear(&opt->df_conflict_file_set, 1); |
f701aae0 EN |
602 | for (i = 0; i < df_sorted_entries.nr; i++) { |
603 | const char *path = df_sorted_entries.items[i].string; | |
ef02b317 | 604 | int len = strlen(path); |
f701aae0 | 605 | struct stage_data *e = df_sorted_entries.items[i].util; |
ef02b317 EN |
606 | |
607 | /* | |
608 | * Check if last_file & path correspond to a D/F conflict; | |
609 | * i.e. whether path is last_file+'/'+<something>. | |
70cc3d36 EN |
610 | * If so, record that it's okay to remove last_file to make |
611 | * room for path and friends if needed. | |
ef02b317 EN |
612 | */ |
613 | if (last_file && | |
614 | len > last_len && | |
615 | memcmp(path, last_file, last_len) == 0 && | |
616 | path[last_len] == '/') { | |
259ccb6c | 617 | string_list_insert(&opt->df_conflict_file_set, last_file); |
ef02b317 EN |
618 | } |
619 | ||
620 | /* | |
621 | * Determine whether path could exist as a file in the | |
622 | * working directory as a possible D/F conflict. This | |
623 | * will only occur when it exists in stage 2 as a | |
624 | * file. | |
625 | */ | |
626 | if (S_ISREG(e->stages[2].mode) || S_ISLNK(e->stages[2].mode)) { | |
627 | last_file = path; | |
628 | last_len = len; | |
ef02b317 EN |
629 | } else { |
630 | last_file = NULL; | |
631 | } | |
632 | } | |
f701aae0 | 633 | string_list_clear(&df_sorted_entries, 0); |
ef02b317 EN |
634 | } |
635 | ||
bc9204d4 JS |
636 | static int update_stages(struct merge_options *opt, const char *path, |
637 | const struct diff_filespec *o, | |
650467cf EN |
638 | const struct diff_filespec *a, |
639 | const struct diff_filespec *b) | |
9047ebbc | 640 | { |
f53d3977 EN |
641 | |
642 | /* | |
643 | * NOTE: It is usually a bad idea to call update_stages on a path | |
644 | * before calling update_file on that same path, since it can | |
645 | * sometimes lead to spurious "refusing to lose untracked file..." | |
646 | * messages from update_file (via make_room_for path via | |
647 | * would_lose_untracked). Instead, reverse the order of the calls | |
648 | * (executing update_file first and then update_stages). | |
649 | */ | |
650467cf EN |
650 | int clear = 1; |
651 | int options = ADD_CACHE_OK_TO_ADD | ADD_CACHE_SKIP_DFCHECK; | |
9047ebbc | 652 | if (clear) |
0d6caa2d | 653 | if (remove_file_from_index(opt->repo->index, path)) |
9047ebbc MV |
654 | return -1; |
655 | if (o) | |
8daec1df | 656 | if (add_cacheinfo(opt, o, path, 1, 0, options)) |
9047ebbc MV |
657 | return -1; |
658 | if (a) | |
8daec1df | 659 | if (add_cacheinfo(opt, a, path, 2, 0, options)) |
9047ebbc MV |
660 | return -1; |
661 | if (b) | |
8daec1df | 662 | if (add_cacheinfo(opt, b, path, 3, 0, options)) |
9047ebbc MV |
663 | return -1; |
664 | return 0; | |
665 | } | |
666 | ||
b8ddf164 EN |
667 | static void update_entry(struct stage_data *entry, |
668 | struct diff_filespec *o, | |
669 | struct diff_filespec *a, | |
670 | struct diff_filespec *b) | |
2ff739f9 | 671 | { |
2ff739f9 EN |
672 | entry->processed = 0; |
673 | entry->stages[1].mode = o->mode; | |
674 | entry->stages[2].mode = a->mode; | |
675 | entry->stages[3].mode = b->mode; | |
fd429e98 | 676 | oidcpy(&entry->stages[1].oid, &o->oid); |
677 | oidcpy(&entry->stages[2].oid, &a->oid); | |
678 | oidcpy(&entry->stages[3].oid, &b->oid); | |
2ff739f9 EN |
679 | } |
680 | ||
259ccb6c | 681 | static int remove_file(struct merge_options *opt, int clean, |
b7fa51da | 682 | const char *path, int no_wd) |
9047ebbc | 683 | { |
259ccb6c EN |
684 | int update_cache = opt->call_depth || clean; |
685 | int update_working_directory = !opt->call_depth && !no_wd; | |
9047ebbc MV |
686 | |
687 | if (update_cache) { | |
259ccb6c | 688 | if (remove_file_from_index(opt->repo->index, path)) |
9047ebbc MV |
689 | return -1; |
690 | } | |
691 | if (update_working_directory) { | |
ae352c7f DT |
692 | if (ignore_case) { |
693 | struct cache_entry *ce; | |
259ccb6c | 694 | ce = index_file_exists(opt->repo->index, path, strlen(path), |
0d6caa2d | 695 | ignore_case); |
4cba2b01 | 696 | if (ce && ce_stage(ce) == 0 && strcmp(path, ce->name)) |
ae352c7f DT |
697 | return 0; |
698 | } | |
25755e84 | 699 | if (remove_path(path)) |
9047ebbc | 700 | return -1; |
9047ebbc MV |
701 | } |
702 | return 0; | |
703 | } | |
704 | ||
45bc131d JK |
705 | /* add a string to a strbuf, but converting "/" to "_" */ |
706 | static void add_flattened_path(struct strbuf *out, const char *s) | |
707 | { | |
708 | size_t i = out->len; | |
709 | strbuf_addstr(out, s); | |
710 | for (; i < out->len; i++) | |
711 | if (out->buf[i] == '/') | |
712 | out->buf[i] = '_'; | |
713 | } | |
714 | ||
4d7101e2 EN |
715 | static char *unique_path(struct merge_options *opt, |
716 | const char *path, | |
717 | 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; | |
259ccb6c | 728 | while (hashmap_get_from_hash(&opt->current_file_dir_set, |
fc65b00d | 729 | path_hash(newpath.buf), newpath.buf) || |
259ccb6c | 730 | (!opt->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)); | |
259ccb6c | 737 | hashmap_add(&opt->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 | */ | |
0d6caa2d NTND |
747 | static int dir_in_way(struct index_state *istate, const char *path, |
748 | int check_working_copy, int empty_ok) | |
f2507b4e | 749 | { |
b4600fbe JK |
750 | int pos; |
751 | struct strbuf dirpath = STRBUF_INIT; | |
f2507b4e EN |
752 | struct stat st; |
753 | ||
b4600fbe JK |
754 | strbuf_addstr(&dirpath, path); |
755 | strbuf_addch(&dirpath, '/'); | |
f2507b4e | 756 | |
0d6caa2d | 757 | pos = index_name_pos(istate, dirpath.buf, dirpath.len); |
f2507b4e EN |
758 | |
759 | if (pos < 0) | |
760 | pos = -1 - pos; | |
0d6caa2d NTND |
761 | if (pos < istate->cache_nr && |
762 | !strncmp(dirpath.buf, istate->cache[pos]->name, dirpath.len)) { | |
b4600fbe | 763 | strbuf_release(&dirpath); |
f2507b4e EN |
764 | return 1; |
765 | } | |
766 | ||
b4600fbe | 767 | strbuf_release(&dirpath); |
5423d2e7 DT |
768 | return check_working_copy && !lstat(path, &st) && S_ISDIR(st.st_mode) && |
769 | !(empty_ok && is_empty_dir(path)); | |
f2507b4e EN |
770 | } |
771 | ||
1de70dbd EN |
772 | /* |
773 | * Returns whether path was tracked in the index before the merge started, | |
774 | * and its oid and mode match the specified values | |
775 | */ | |
259ccb6c | 776 | static int was_tracked_and_matches(struct merge_options *opt, const char *path, |
8daec1df | 777 | const struct diff_filespec *blob) |
60c91181 | 778 | { |
259ccb6c | 779 | int pos = index_name_pos(&opt->orig_index, path, strlen(path)); |
1de70dbd EN |
780 | struct cache_entry *ce; |
781 | ||
782 | if (0 > pos) | |
783 | /* we were not tracking this path before the merge */ | |
784 | return 0; | |
785 | ||
786 | /* See if the file we were tracking before matches */ | |
259ccb6c | 787 | ce = opt->orig_index.cache[pos]; |
8daec1df | 788 | return (oid_eq(&ce->oid, &blob->oid) && ce->ce_mode == blob->mode); |
1de70dbd EN |
789 | } |
790 | ||
a35edc84 EN |
791 | /* |
792 | * Returns whether path was tracked in the index before the merge started | |
793 | */ | |
259ccb6c | 794 | static int was_tracked(struct merge_options *opt, const char *path) |
60c91181 | 795 | { |
259ccb6c | 796 | int pos = index_name_pos(&opt->orig_index, path, strlen(path)); |
60c91181 | 797 | |
f8d83fb6 | 798 | if (0 <= pos) |
a35edc84 | 799 | /* we were tracking this path before the merge */ |
f8d83fb6 JS |
800 | return 1; |
801 | ||
aacb82de | 802 | return 0; |
60c91181 JH |
803 | } |
804 | ||
259ccb6c | 805 | static int would_lose_untracked(struct merge_options *opt, const char *path) |
9047ebbc | 806 | { |
259ccb6c | 807 | struct index_state *istate = opt->repo->index; |
0d6caa2d | 808 | |
a35edc84 EN |
809 | /* |
810 | * This may look like it can be simplified to: | |
259ccb6c | 811 | * return !was_tracked(opt, path) && file_exists(path) |
a35edc84 EN |
812 | * but it can't. This function needs to know whether path was in |
813 | * the working tree due to EITHER having been tracked in the index | |
814 | * before the merge OR having been put into the working copy and | |
815 | * index by unpack_trees(). Due to that either-or requirement, we | |
816 | * check the current index instead of the original one. | |
817 | * | |
818 | * Note that we do not need to worry about merge-recursive itself | |
819 | * updating the index after unpack_trees() and before calling this | |
820 | * function, because we strictly require all code paths in | |
821 | * merge-recursive to update the working tree first and the index | |
822 | * second. Doing otherwise would break | |
823 | * update_file()/would_lose_untracked(); see every comment in this | |
824 | * file which mentions "update_stages". | |
825 | */ | |
0d6caa2d | 826 | int pos = index_name_pos(istate, path, strlen(path)); |
a35edc84 EN |
827 | |
828 | if (pos < 0) | |
829 | pos = -1 - pos; | |
0d6caa2d NTND |
830 | while (pos < istate->cache_nr && |
831 | !strcmp(path, istate->cache[pos]->name)) { | |
a35edc84 EN |
832 | /* |
833 | * If stage #0, it is definitely tracked. | |
834 | * If it has stage #2 then it was tracked | |
835 | * before this merge started. All other | |
836 | * cases the path was not tracked. | |
837 | */ | |
0d6caa2d | 838 | switch (ce_stage(istate->cache[pos])) { |
a35edc84 EN |
839 | case 0: |
840 | case 2: | |
841 | return 0; | |
842 | } | |
843 | pos++; | |
844 | } | |
845 | return file_exists(path); | |
60c91181 JH |
846 | } |
847 | ||
259ccb6c | 848 | static int was_dirty(struct merge_options *opt, const char *path) |
64b1abe9 EN |
849 | { |
850 | struct cache_entry *ce; | |
851 | int dirty = 1; | |
852 | ||
259ccb6c | 853 | if (opt->call_depth || !was_tracked(opt, path)) |
64b1abe9 EN |
854 | return !dirty; |
855 | ||
259ccb6c | 856 | ce = index_file_exists(opt->unpack_opts.src_index, |
277292d5 | 857 | path, strlen(path), ignore_case); |
259ccb6c | 858 | dirty = verify_uptodate(ce, &opt->unpack_opts) != 0; |
64b1abe9 | 859 | return dirty; |
60c91181 JH |
860 | } |
861 | ||
259ccb6c | 862 | static int make_room_for_path(struct merge_options *opt, const char *path) |
9047ebbc | 863 | { |
ed0148a5 | 864 | int status, i; |
55653a68 | 865 | const char *msg = _("failed to create path '%s'%s"); |
9047ebbc | 866 | |
ed0148a5 | 867 | /* Unlink any D/F conflict files that are in the way */ |
259ccb6c EN |
868 | for (i = 0; i < opt->df_conflict_file_set.nr; i++) { |
869 | const char *df_path = opt->df_conflict_file_set.items[i].string; | |
ed0148a5 EN |
870 | size_t pathlen = strlen(path); |
871 | size_t df_pathlen = strlen(df_path); | |
872 | if (df_pathlen < pathlen && | |
873 | path[df_pathlen] == '/' && | |
874 | strncmp(path, df_path, df_pathlen) == 0) { | |
259ccb6c | 875 | output(opt, 3, |
55653a68 | 876 | _("Removing %s to make room for subdirectory\n"), |
ed0148a5 EN |
877 | df_path); |
878 | unlink(df_path); | |
259ccb6c | 879 | unsorted_string_list_delete_item(&opt->df_conflict_file_set, |
ed0148a5 EN |
880 | i, 0); |
881 | break; | |
882 | } | |
883 | } | |
884 | ||
885 | /* Make sure leading directories are created */ | |
9047ebbc MV |
886 | status = safe_create_leading_directories_const(path); |
887 | if (status) { | |
6003303a | 888 | if (status == SCLD_EXISTS) |
9047ebbc | 889 | /* something else exists */ |
259ccb6c EN |
890 | return err(opt, msg, path, _(": perhaps a D/F conflict?")); |
891 | return err(opt, msg, path, ""); | |
9047ebbc MV |
892 | } |
893 | ||
60c91181 JH |
894 | /* |
895 | * Do not unlink a file in the work tree if we are not | |
896 | * tracking it. | |
897 | */ | |
259ccb6c EN |
898 | if (would_lose_untracked(opt, path)) |
899 | return err(opt, _("refusing to lose untracked file at '%s'"), | |
d90e759f | 900 | path); |
60c91181 | 901 | |
9047ebbc MV |
902 | /* Successful unlink is good.. */ |
903 | if (!unlink(path)) | |
904 | return 0; | |
905 | /* .. and so is no existing file */ | |
906 | if (errno == ENOENT) | |
907 | return 0; | |
908 | /* .. but not some other error (who really cares what?) */ | |
259ccb6c | 909 | return err(opt, msg, path, _(": perhaps a D/F conflict?")); |
9047ebbc MV |
910 | } |
911 | ||
259ccb6c | 912 | static int update_file_flags(struct merge_options *opt, |
8daec1df | 913 | const struct diff_filespec *contents, |
75456f96 JS |
914 | const char *path, |
915 | int update_cache, | |
916 | int update_wd) | |
9047ebbc | 917 | { |
6003303a JS |
918 | int ret = 0; |
919 | ||
259ccb6c | 920 | if (opt->call_depth) |
9047ebbc MV |
921 | update_wd = 0; |
922 | ||
923 | if (update_wd) { | |
924 | enum object_type type; | |
925 | void *buf; | |
926 | unsigned long size; | |
927 | ||
8daec1df | 928 | if (S_ISGITLINK(contents->mode)) { |
0c44c943 JH |
929 | /* |
930 | * We may later decide to recursively descend into | |
931 | * the submodule directory and update its index | |
932 | * and/or work tree, but we do not do that now. | |
933 | */ | |
68d03e4a | 934 | update_wd = 0; |
0c44c943 | 935 | goto update_index; |
68d03e4a | 936 | } |
9047ebbc | 937 | |
8daec1df | 938 | buf = read_object_file(&contents->oid, &type, &size); |
f836bf39 EN |
939 | if (!buf) { |
940 | ret = err(opt, _("cannot read object %s '%s'"), | |
941 | oid_to_hex(&contents->oid), path); | |
942 | goto free_buf; | |
943 | } | |
6003303a | 944 | if (type != OBJ_BLOB) { |
8daec1df EN |
945 | ret = err(opt, _("blob expected for %s '%s'"), |
946 | oid_to_hex(&contents->oid), path); | |
6003303a JS |
947 | goto free_buf; |
948 | } | |
8daec1df | 949 | if (S_ISREG(contents->mode)) { |
f285a2d7 | 950 | struct strbuf strbuf = STRBUF_INIT; |
4d7101e2 EN |
951 | if (convert_to_working_tree(opt->repo->index, |
952 | path, buf, size, &strbuf)) { | |
9047ebbc MV |
953 | free(buf); |
954 | size = strbuf.len; | |
955 | buf = strbuf_detach(&strbuf, NULL); | |
956 | } | |
957 | } | |
958 | ||
259ccb6c | 959 | if (make_room_for_path(opt, path) < 0) { |
9047ebbc | 960 | update_wd = 0; |
75456f96 | 961 | goto free_buf; |
9047ebbc | 962 | } |
8daec1df EN |
963 | if (S_ISREG(contents->mode) || |
964 | (!has_symlinks && S_ISLNK(contents->mode))) { | |
9047ebbc | 965 | int fd; |
8daec1df EN |
966 | int mode = (contents->mode & 0100 ? 0777 : 0666); |
967 | ||
9047ebbc | 968 | fd = open(path, O_WRONLY | O_TRUNC | O_CREAT, mode); |
6003303a | 969 | if (fd < 0) { |
259ccb6c | 970 | ret = err(opt, _("failed to open '%s': %s"), |
bc9204d4 | 971 | path, strerror(errno)); |
6003303a JS |
972 | goto free_buf; |
973 | } | |
f633ea2c | 974 | write_in_full(fd, buf, size); |
9047ebbc | 975 | close(fd); |
8daec1df | 976 | } else if (S_ISLNK(contents->mode)) { |
9047ebbc MV |
977 | char *lnk = xmemdupz(buf, size); |
978 | safe_create_leading_directories_const(path); | |
979 | unlink(path); | |
304dcf26 | 980 | if (symlink(lnk, path)) |
259ccb6c | 981 | ret = err(opt, _("failed to symlink '%s': %s"), |
d90e759f | 982 | path, strerror(errno)); |
9047ebbc MV |
983 | free(lnk); |
984 | } else | |
259ccb6c | 985 | ret = err(opt, |
bc9204d4 | 986 | _("do not know what to do with %06o %s '%s'"), |
8daec1df | 987 | contents->mode, oid_to_hex(&contents->oid), path); |
93665365 | 988 | free_buf: |
9047ebbc MV |
989 | free(buf); |
990 | } | |
93665365 | 991 | update_index: |
6003303a | 992 | if (!ret && update_cache) |
8daec1df | 993 | if (add_cacheinfo(opt, contents, path, 0, update_wd, |
fd53b7ff EN |
994 | ADD_CACHE_OK_TO_ADD)) |
995 | return -1; | |
6003303a | 996 | return ret; |
9047ebbc MV |
997 | } |
998 | ||
259ccb6c | 999 | static int update_file(struct merge_options *opt, |
75456f96 | 1000 | int clean, |
8daec1df | 1001 | const struct diff_filespec *contents, |
75456f96 | 1002 | const char *path) |
9047ebbc | 1003 | { |
8daec1df EN |
1004 | return update_file_flags(opt, contents, path, |
1005 | opt->call_depth || clean, !opt->call_depth); | |
9047ebbc MV |
1006 | } |
1007 | ||
1008 | /* Low level file merging, update and removal */ | |
1009 | ||
9cba13ca | 1010 | struct merge_file_info { |
8daec1df | 1011 | struct diff_filespec blob; /* mostly use oid & mode; sometimes path */ |
9047ebbc MV |
1012 | unsigned clean:1, |
1013 | merge:1; | |
1014 | }; | |
1015 | ||
259ccb6c | 1016 | static int merge_3way(struct merge_options *opt, |
b7fa51da | 1017 | mmbuffer_t *result_buf, |
e3de888c | 1018 | const struct diff_filespec *o, |
0c059420 EN |
1019 | const struct diff_filespec *a, |
1020 | const struct diff_filespec *b, | |
9047ebbc | 1021 | const char *branch1, |
b2a7942b EN |
1022 | const char *branch2, |
1023 | const int extra_marker_size) | |
9047ebbc MV |
1024 | { |
1025 | mmfile_t orig, src1, src2; | |
712516bc | 1026 | struct ll_merge_options ll_opts = {0}; |
139ef37a | 1027 | char *base, *name1, *name2; |
9047ebbc | 1028 | int merge_status; |
8cc5b290 | 1029 | |
259ccb6c | 1030 | ll_opts.renormalize = opt->renormalize; |
b2a7942b | 1031 | ll_opts.extra_marker_size = extra_marker_size; |
259ccb6c | 1032 | ll_opts.xdl_opts = opt->xdl_opts; |
712516bc | 1033 | |
259ccb6c | 1034 | if (opt->call_depth) { |
712516bc JN |
1035 | ll_opts.virtual_ancestor = 1; |
1036 | ll_opts.variant = 0; | |
1037 | } else { | |
259ccb6c | 1038 | switch (opt->recursive_variant) { |
8cc5b290 | 1039 | case MERGE_RECURSIVE_OURS: |
712516bc | 1040 | ll_opts.variant = XDL_MERGE_FAVOR_OURS; |
8cc5b290 AP |
1041 | break; |
1042 | case MERGE_RECURSIVE_THEIRS: | |
712516bc | 1043 | ll_opts.variant = XDL_MERGE_FAVOR_THEIRS; |
8cc5b290 AP |
1044 | break; |
1045 | default: | |
712516bc | 1046 | ll_opts.variant = 0; |
8cc5b290 AP |
1047 | break; |
1048 | } | |
1049 | } | |
9047ebbc | 1050 | |
139ef37a EN |
1051 | assert(a->path && b->path && o->path && opt->ancestor); |
1052 | if (strcmp(a->path, b->path) || strcmp(a->path, o->path) != 0) { | |
1053 | base = mkpathdup("%s:%s", opt->ancestor, o->path); | |
4e2d094d RJ |
1054 | name1 = mkpathdup("%s:%s", branch1, a->path); |
1055 | name2 = mkpathdup("%s:%s", branch2, b->path); | |
606475f3 | 1056 | } else { |
139ef37a | 1057 | base = mkpathdup("%s", opt->ancestor); |
4e2d094d RJ |
1058 | name1 = mkpathdup("%s", branch1); |
1059 | name2 = mkpathdup("%s", branch2); | |
606475f3 | 1060 | } |
9047ebbc | 1061 | |
e3de888c | 1062 | read_mmblob(&orig, &o->oid); |
d449347d | 1063 | read_mmblob(&src1, &a->oid); |
1064 | read_mmblob(&src2, &b->oid); | |
9047ebbc | 1065 | |
139ef37a | 1066 | merge_status = ll_merge(result_buf, a->path, &orig, base, |
32eaa468 | 1067 | &src1, name1, &src2, name2, |
259ccb6c | 1068 | opt->repo->index, &ll_opts); |
9047ebbc | 1069 | |
139ef37a | 1070 | free(base); |
9047ebbc MV |
1071 | free(name1); |
1072 | free(name2); | |
1073 | free(orig.ptr); | |
1074 | free(src1.ptr); | |
1075 | free(src2.ptr); | |
1076 | return merge_status; | |
1077 | } | |
1078 | ||
0d6caa2d NTND |
1079 | static int find_first_merges(struct repository *repo, |
1080 | struct object_array *result, const char *path, | |
d90e759f | 1081 | struct commit *a, struct commit *b) |
18cfc088 SB |
1082 | { |
1083 | int i, j; | |
1084 | struct object_array merges = OBJECT_ARRAY_INIT; | |
1085 | struct commit *commit; | |
1086 | int contains_another; | |
1087 | ||
db1ba2a2 | 1088 | char merged_revision[GIT_MAX_HEXSZ + 2]; |
18cfc088 SB |
1089 | const char *rev_args[] = { "rev-list", "--merges", "--ancestry-path", |
1090 | "--all", merged_revision, NULL }; | |
1091 | struct rev_info revs; | |
1092 | struct setup_revision_opt rev_opts; | |
1093 | ||
1094 | memset(result, 0, sizeof(struct object_array)); | |
1095 | memset(&rev_opts, 0, sizeof(rev_opts)); | |
1096 | ||
1097 | /* get all revisions that merge commit a */ | |
1098 | xsnprintf(merged_revision, sizeof(merged_revision), "^%s", | |
d90e759f | 1099 | oid_to_hex(&a->object.oid)); |
0d6caa2d | 1100 | repo_init_revisions(repo, &revs, NULL); |
18cfc088 SB |
1101 | rev_opts.submodule = path; |
1102 | /* FIXME: can't handle linked worktrees in submodules yet */ | |
1103 | revs.single_worktree = path != NULL; | |
1104 | setup_revisions(ARRAY_SIZE(rev_args)-1, rev_args, &revs, &rev_opts); | |
1105 | ||
1106 | /* save all revisions from the above list that contain b */ | |
1107 | if (prepare_revision_walk(&revs)) | |
1108 | die("revision walk setup failed"); | |
1109 | while ((commit = get_revision(&revs)) != NULL) { | |
1110 | struct object *o = &(commit->object); | |
1111 | if (in_merge_bases(b, commit)) | |
1112 | add_object_array(o, NULL, &merges); | |
1113 | } | |
1114 | reset_revision_walk(); | |
1115 | ||
1116 | /* Now we've got all merges that contain a and b. Prune all | |
1117 | * merges that contain another found merge and save them in | |
1118 | * result. | |
1119 | */ | |
1120 | for (i = 0; i < merges.nr; i++) { | |
1121 | struct commit *m1 = (struct commit *) merges.objects[i].item; | |
1122 | ||
1123 | contains_another = 0; | |
1124 | for (j = 0; j < merges.nr; j++) { | |
1125 | struct commit *m2 = (struct commit *) merges.objects[j].item; | |
1126 | if (i != j && in_merge_bases(m2, m1)) { | |
1127 | contains_another = 1; | |
1128 | break; | |
1129 | } | |
1130 | } | |
1131 | ||
1132 | if (!contains_another) | |
1133 | add_object_array(merges.objects[i].item, NULL, result); | |
1134 | } | |
1135 | ||
1136 | object_array_clear(&merges); | |
1137 | return result->nr; | |
1138 | } | |
1139 | ||
1140 | static void print_commit(struct commit *commit) | |
1141 | { | |
1142 | struct strbuf sb = STRBUF_INIT; | |
1143 | struct pretty_print_context ctx = {0}; | |
1144 | ctx.date_mode.type = DATE_NORMAL; | |
1145 | format_commit_message(commit, " %h: %m %s", &sb, &ctx); | |
1146 | fprintf(stderr, "%s\n", sb.buf); | |
1147 | strbuf_release(&sb); | |
1148 | } | |
1149 | ||
8daec1df EN |
1150 | static int is_valid(const struct diff_filespec *dfs) |
1151 | { | |
1152 | return dfs->mode != 0 && !is_null_oid(&dfs->oid); | |
1153 | } | |
1154 | ||
259ccb6c | 1155 | static int merge_submodule(struct merge_options *opt, |
325f3a8e | 1156 | struct object_id *result, const char *path, |
18cfc088 | 1157 | const struct object_id *base, const struct object_id *a, |
325f3a8e | 1158 | const struct object_id *b) |
18cfc088 SB |
1159 | { |
1160 | struct commit *commit_base, *commit_a, *commit_b; | |
1161 | int parent_count; | |
1162 | struct object_array merges; | |
1163 | ||
1164 | int i; | |
259ccb6c | 1165 | int search = !opt->call_depth; |
18cfc088 SB |
1166 | |
1167 | /* store a in result in case we fail */ | |
1168 | oidcpy(result, a); | |
1169 | ||
1170 | /* we can not handle deletion conflicts */ | |
1171 | if (is_null_oid(base)) | |
1172 | return 0; | |
1173 | if (is_null_oid(a)) | |
1174 | return 0; | |
1175 | if (is_null_oid(b)) | |
1176 | return 0; | |
1177 | ||
1178 | if (add_submodule_odb(path)) { | |
259ccb6c | 1179 | output(opt, 1, _("Failed to merge submodule %s (not checked out)"), path); |
18cfc088 SB |
1180 | return 0; |
1181 | } | |
1182 | ||
259ccb6c EN |
1183 | if (!(commit_base = lookup_commit_reference(opt->repo, base)) || |
1184 | !(commit_a = lookup_commit_reference(opt->repo, a)) || | |
1185 | !(commit_b = lookup_commit_reference(opt->repo, b))) { | |
1186 | output(opt, 1, _("Failed to merge submodule %s (commits not present)"), path); | |
18cfc088 SB |
1187 | return 0; |
1188 | } | |
1189 | ||
1190 | /* check whether both changes are forward */ | |
1191 | if (!in_merge_bases(commit_base, commit_a) || | |
1192 | !in_merge_bases(commit_base, commit_b)) { | |
259ccb6c | 1193 | output(opt, 1, _("Failed to merge submodule %s (commits don't follow merge-base)"), path); |
18cfc088 SB |
1194 | return 0; |
1195 | } | |
1196 | ||
1197 | /* Case #1: a is contained in b or vice versa */ | |
1198 | if (in_merge_bases(commit_a, commit_b)) { | |
1199 | oidcpy(result, b); | |
259ccb6c EN |
1200 | if (show(opt, 3)) { |
1201 | output(opt, 3, _("Fast-forwarding submodule %s to the following commit:"), path); | |
1202 | output_commit_title(opt, commit_b); | |
1203 | } else if (show(opt, 2)) | |
1204 | output(opt, 2, _("Fast-forwarding submodule %s"), path); | |
76f42125 LM |
1205 | else |
1206 | ; /* no output */ | |
1207 | ||
18cfc088 SB |
1208 | return 1; |
1209 | } | |
1210 | if (in_merge_bases(commit_b, commit_a)) { | |
1211 | oidcpy(result, a); | |
259ccb6c EN |
1212 | if (show(opt, 3)) { |
1213 | output(opt, 3, _("Fast-forwarding submodule %s to the following commit:"), path); | |
1214 | output_commit_title(opt, commit_a); | |
1215 | } else if (show(opt, 2)) | |
1216 | output(opt, 2, _("Fast-forwarding submodule %s"), path); | |
76f42125 LM |
1217 | else |
1218 | ; /* no output */ | |
1219 | ||
18cfc088 SB |
1220 | return 1; |
1221 | } | |
1222 | ||
1223 | /* | |
1224 | * Case #2: There are one or more merges that contain a and b in | |
1225 | * the submodule. If there is only one, then present it as a | |
1226 | * suggestion to the user, but leave it marked unmerged so the | |
1227 | * user needs to confirm the resolution. | |
1228 | */ | |
1229 | ||
1230 | /* Skip the search if makes no sense to the calling context. */ | |
1231 | if (!search) | |
1232 | return 0; | |
1233 | ||
1234 | /* find commit which merges them */ | |
259ccb6c | 1235 | parent_count = find_first_merges(opt->repo, &merges, path, |
0d6caa2d | 1236 | commit_a, commit_b); |
18cfc088 SB |
1237 | switch (parent_count) { |
1238 | case 0: | |
259ccb6c | 1239 | output(opt, 1, _("Failed to merge submodule %s (merge following commits not found)"), path); |
18cfc088 SB |
1240 | break; |
1241 | ||
1242 | case 1: | |
259ccb6c EN |
1243 | output(opt, 1, _("Failed to merge submodule %s (not fast-forward)"), path); |
1244 | output(opt, 2, _("Found a possible merge resolution for the submodule:\n")); | |
18cfc088 | 1245 | print_commit((struct commit *) merges.objects[0].item); |
259ccb6c | 1246 | output(opt, 2, _( |
d90e759f EN |
1247 | "If this is correct simply add it to the index " |
1248 | "for example\n" | |
1249 | "by using:\n\n" | |
1250 | " git update-index --cacheinfo 160000 %s \"%s\"\n\n" | |
1251 | "which will accept this suggestion.\n"), | |
1252 | oid_to_hex(&merges.objects[0].item->oid), path); | |
18cfc088 SB |
1253 | break; |
1254 | ||
1255 | default: | |
259ccb6c | 1256 | output(opt, 1, _("Failed to merge submodule %s (multiple merges found)"), path); |
18cfc088 SB |
1257 | for (i = 0; i < merges.nr; i++) |
1258 | print_commit((struct commit *) merges.objects[i].item); | |
1259 | } | |
1260 | ||
1261 | object_array_clear(&merges); | |
1262 | return 0; | |
1263 | } | |
1264 | ||
259ccb6c | 1265 | static int merge_mode_and_contents(struct merge_options *opt, |
e3de888c | 1266 | const struct diff_filespec *o, |
d9573556 EN |
1267 | const struct diff_filespec *a, |
1268 | const struct diff_filespec *b, | |
1269 | const char *filename, | |
1270 | const char *branch1, | |
1271 | const char *branch2, | |
b2a7942b | 1272 | const int extra_marker_size, |
d9573556 | 1273 | struct merge_file_info *result) |
9047ebbc | 1274 | { |
259ccb6c | 1275 | if (opt->branch1 != branch1) { |
4f445453 EN |
1276 | /* |
1277 | * It's weird getting a reverse merge with HEAD on the bottom | |
1278 | * side of the conflict markers and the other branch on the | |
1279 | * top. Fix that. | |
1280 | */ | |
e3de888c | 1281 | return merge_mode_and_contents(opt, o, b, a, |
4f445453 | 1282 | filename, |
b2a7942b EN |
1283 | branch2, branch1, |
1284 | extra_marker_size, result); | |
4f445453 EN |
1285 | } |
1286 | ||
3c8a51e8 JS |
1287 | result->merge = 0; |
1288 | result->clean = 1; | |
9047ebbc MV |
1289 | |
1290 | if ((S_IFMT & a->mode) != (S_IFMT & b->mode)) { | |
3c8a51e8 | 1291 | result->clean = 0; |
9047ebbc | 1292 | if (S_ISREG(a->mode)) { |
8daec1df EN |
1293 | result->blob.mode = a->mode; |
1294 | oidcpy(&result->blob.oid, &a->oid); | |
9047ebbc | 1295 | } else { |
8daec1df EN |
1296 | result->blob.mode = b->mode; |
1297 | oidcpy(&result->blob.oid, &b->oid); | |
9047ebbc MV |
1298 | } |
1299 | } else { | |
e3de888c | 1300 | if (!oid_eq(&a->oid, &o->oid) && !oid_eq(&b->oid, &o->oid)) |
3c8a51e8 | 1301 | result->merge = 1; |
9047ebbc MV |
1302 | |
1303 | /* | |
1304 | * Merge modes | |
1305 | */ | |
e3de888c | 1306 | if (a->mode == b->mode || a->mode == o->mode) |
8daec1df | 1307 | result->blob.mode = b->mode; |
9047ebbc | 1308 | else { |
8daec1df | 1309 | result->blob.mode = a->mode; |
e3de888c | 1310 | if (b->mode != o->mode) { |
3c8a51e8 JS |
1311 | result->clean = 0; |
1312 | result->merge = 1; | |
9047ebbc MV |
1313 | } |
1314 | } | |
1315 | ||
e3de888c | 1316 | if (oid_eq(&a->oid, &b->oid) || oid_eq(&a->oid, &o->oid)) |
8daec1df | 1317 | oidcpy(&result->blob.oid, &b->oid); |
e3de888c | 1318 | else if (oid_eq(&b->oid, &o->oid)) |
8daec1df | 1319 | oidcpy(&result->blob.oid, &a->oid); |
9047ebbc MV |
1320 | else if (S_ISREG(a->mode)) { |
1321 | mmbuffer_t result_buf; | |
6003303a | 1322 | int ret = 0, merge_status; |
9047ebbc | 1323 | |
e3de888c | 1324 | merge_status = merge_3way(opt, &result_buf, o, a, b, |
b2a7942b EN |
1325 | branch1, branch2, |
1326 | extra_marker_size); | |
9047ebbc MV |
1327 | |
1328 | if ((merge_status < 0) || !result_buf.ptr) | |
259ccb6c | 1329 | ret = err(opt, _("Failed to execute internal merge")); |
9047ebbc | 1330 | |
a09c985e PO |
1331 | if (!ret && |
1332 | write_object_file(result_buf.ptr, result_buf.size, | |
8daec1df | 1333 | blob_type, &result->blob.oid)) |
259ccb6c | 1334 | ret = err(opt, _("Unable to add %s to database"), |
bc9204d4 | 1335 | a->path); |
9047ebbc MV |
1336 | |
1337 | free(result_buf.ptr); | |
6003303a JS |
1338 | if (ret) |
1339 | return ret; | |
3c8a51e8 | 1340 | result->clean = (merge_status == 0); |
9047ebbc | 1341 | } else if (S_ISGITLINK(a->mode)) { |
8daec1df | 1342 | result->clean = merge_submodule(opt, &result->blob.oid, |
e3de888c EN |
1343 | o->path, |
1344 | &o->oid, | |
d90e759f EN |
1345 | &a->oid, |
1346 | &b->oid); | |
9047ebbc | 1347 | } else if (S_ISLNK(a->mode)) { |
259ccb6c | 1348 | switch (opt->recursive_variant) { |
fd48b464 | 1349 | case MERGE_RECURSIVE_NORMAL: |
8daec1df | 1350 | oidcpy(&result->blob.oid, &a->oid); |
fd48b464 JH |
1351 | if (!oid_eq(&a->oid, &b->oid)) |
1352 | result->clean = 0; | |
1353 | break; | |
1354 | case MERGE_RECURSIVE_OURS: | |
8daec1df | 1355 | oidcpy(&result->blob.oid, &a->oid); |
fd48b464 JH |
1356 | break; |
1357 | case MERGE_RECURSIVE_THEIRS: | |
8daec1df | 1358 | oidcpy(&result->blob.oid, &b->oid); |
fd48b464 JH |
1359 | break; |
1360 | } | |
ef1177d1 | 1361 | } else |
033abf97 | 1362 | BUG("unsupported object type in the tree"); |
9047ebbc MV |
1363 | } |
1364 | ||
05cf21eb | 1365 | if (result->merge) |
259ccb6c | 1366 | output(opt, 2, _("Auto-merging %s"), filename); |
05cf21eb | 1367 | |
3c8a51e8 | 1368 | return 0; |
9047ebbc MV |
1369 | } |
1370 | ||
259ccb6c | 1371 | static int handle_rename_via_dir(struct merge_options *opt, |
e2d563df | 1372 | struct rename_conflict_info *ci) |
9c0743fe | 1373 | { |
5455c338 EN |
1374 | /* |
1375 | * Handle file adds that need to be renamed due to directory rename | |
1376 | * detection. This differs from handle_rename_normal, because | |
1377 | * there is no content merge to do; just move the file into the | |
1378 | * desired final location. | |
1379 | */ | |
e2d563df EN |
1380 | const struct rename *ren = ci->ren1; |
1381 | const struct diff_filespec *dest = ren->pair->two; | |
8c8e5bd6 | 1382 | char *file_path = dest->path; |
8e012516 DS |
1383 | int mark_conflicted = (opt->detect_directory_renames == |
1384 | MERGE_DIRECTORY_RENAMES_CONFLICT); | |
8c8e5bd6 | 1385 | assert(ren->dir_rename_original_dest); |
9c0743fe | 1386 | |
259ccb6c | 1387 | if (!opt->call_depth && would_lose_untracked(opt, dest->path)) { |
8c8e5bd6 EN |
1388 | mark_conflicted = 1; |
1389 | file_path = unique_path(opt, dest->path, ren->branch); | |
259ccb6c | 1390 | output(opt, 1, _("Error: Refusing to lose untracked file at %s; " |
8c8e5bd6 EN |
1391 | "writing to %s instead."), |
1392 | dest->path, file_path); | |
1393 | } | |
79c47598 | 1394 | |
8c8e5bd6 | 1395 | if (mark_conflicted) { |
79c47598 | 1396 | /* |
8c8e5bd6 EN |
1397 | * Write the file in worktree at file_path. In the index, |
1398 | * only record the file at dest->path in the appropriate | |
1399 | * higher stage. | |
79c47598 | 1400 | */ |
8c8e5bd6 | 1401 | if (update_file(opt, 0, dest, file_path)) |
79c47598 | 1402 | return -1; |
8c8e5bd6 EN |
1403 | if (file_path != dest->path) |
1404 | free(file_path); | |
1405 | if (update_stages(opt, dest->path, NULL, | |
1406 | ren->branch == opt->branch1 ? dest : NULL, | |
1407 | ren->branch == opt->branch1 ? NULL : dest)) | |
1408 | return -1; | |
1409 | return 0; /* not clean, but conflicted */ | |
1410 | } else { | |
1411 | /* Update dest->path both in index and in worktree */ | |
1412 | if (update_file(opt, 1, dest, dest->path)) | |
1413 | return -1; | |
1414 | return 1; /* clean */ | |
79c47598 | 1415 | } |
6bdaead1 EN |
1416 | } |
1417 | ||
259ccb6c | 1418 | static int handle_change_delete(struct merge_options *opt, |
d90e759f | 1419 | const char *path, const char *old_path, |
8daec1df EN |
1420 | const struct diff_filespec *o, |
1421 | const struct diff_filespec *changed, | |
d90e759f EN |
1422 | const char *change_branch, |
1423 | const char *delete_branch, | |
1424 | const char *change, const char *change_past) | |
b7033252 | 1425 | { |
b26d87f2 MM |
1426 | char *alt_path = NULL; |
1427 | const char *update_path = path; | |
75456f96 | 1428 | int ret = 0; |
b26d87f2 | 1429 | |
259ccb6c EN |
1430 | if (dir_in_way(opt->repo->index, path, !opt->call_depth, 0) || |
1431 | (!opt->call_depth && would_lose_untracked(opt, path))) { | |
1432 | update_path = alt_path = unique_path(opt, path, change_branch); | |
b7033252 EN |
1433 | } |
1434 | ||
259ccb6c | 1435 | if (opt->call_depth) { |
b7033252 EN |
1436 | /* |
1437 | * We cannot arbitrarily accept either a_sha or b_sha as | |
1438 | * correct; since there is no true "middle point" between | |
1439 | * them, simply reuse the base version for virtual merge base. | |
1440 | */ | |
259ccb6c | 1441 | ret = remove_file_from_index(opt->repo->index, path); |
75456f96 | 1442 | if (!ret) |
8daec1df | 1443 | ret = update_file(opt, 0, o, update_path); |
b7033252 | 1444 | } else { |
5b26c3c9 EN |
1445 | /* |
1446 | * Despite the four nearly duplicate messages and argument | |
1447 | * lists below and the ugliness of the nested if-statements, | |
1448 | * having complete messages makes the job easier for | |
1449 | * translators. | |
1450 | * | |
1451 | * The slight variance among the cases is due to the fact | |
1452 | * that: | |
1453 | * 1) directory/file conflicts (in effect if | |
1454 | * !alt_path) could cause us to need to write the | |
1455 | * file to a different path. | |
1456 | * 2) renames (in effect if !old_path) could mean that | |
1457 | * there are two names for the path that the user | |
1458 | * may know the file by. | |
1459 | */ | |
b26d87f2 MM |
1460 | if (!alt_path) { |
1461 | if (!old_path) { | |
259ccb6c | 1462 | output(opt, 1, _("CONFLICT (%s/delete): %s deleted in %s " |
b26d87f2 MM |
1463 | "and %s in %s. Version %s of %s left in tree."), |
1464 | change, path, delete_branch, change_past, | |
1465 | change_branch, change_branch, path); | |
1466 | } else { | |
259ccb6c | 1467 | output(opt, 1, _("CONFLICT (%s/delete): %s deleted in %s " |
b26d87f2 MM |
1468 | "and %s to %s in %s. Version %s of %s left in tree."), |
1469 | change, old_path, delete_branch, change_past, path, | |
1470 | change_branch, change_branch, path); | |
1471 | } | |
55653a68 | 1472 | } else { |
b26d87f2 | 1473 | if (!old_path) { |
259ccb6c | 1474 | output(opt, 1, _("CONFLICT (%s/delete): %s deleted in %s " |
b26d87f2 MM |
1475 | "and %s in %s. Version %s of %s left in tree at %s."), |
1476 | change, path, delete_branch, change_past, | |
1477 | change_branch, change_branch, path, alt_path); | |
1478 | } else { | |
259ccb6c | 1479 | output(opt, 1, _("CONFLICT (%s/delete): %s deleted in %s " |
b26d87f2 MM |
1480 | "and %s to %s in %s. Version %s of %s left in tree at %s."), |
1481 | change, old_path, delete_branch, change_past, path, | |
1482 | change_branch, change_branch, path, alt_path); | |
1483 | } | |
55653a68 | 1484 | } |
35a74abf | 1485 | /* |
b26d87f2 | 1486 | * No need to call update_file() on path when change_branch == |
259ccb6c | 1487 | * opt->branch1 && !alt_path, since that would needlessly touch |
b26d87f2 MM |
1488 | * path. We could call update_file_flags() with update_cache=0 |
1489 | * and update_wd=0, but that's a no-op. | |
35a74abf | 1490 | */ |
259ccb6c | 1491 | if (change_branch != opt->branch1 || alt_path) |
8daec1df | 1492 | ret = update_file(opt, 0, changed, update_path); |
b7033252 | 1493 | } |
b26d87f2 | 1494 | free(alt_path); |
75456f96 JS |
1495 | |
1496 | return ret; | |
b7033252 EN |
1497 | } |
1498 | ||
259ccb6c | 1499 | static int handle_rename_delete(struct merge_options *opt, |
e2d563df | 1500 | struct rename_conflict_info *ci) |
9047ebbc | 1501 | { |
e2d563df EN |
1502 | const struct rename *ren = ci->ren1; |
1503 | const struct diff_filespec *orig = ren->pair->one; | |
1504 | const struct diff_filespec *dest = ren->pair->two; | |
1505 | const char *rename_branch = ren->branch; | |
1506 | const char *delete_branch = (opt->branch1 == ren->branch ? | |
1507 | opt->branch2 : opt->branch1); | |
6ef2cb00 | 1508 | |
259ccb6c EN |
1509 | if (handle_change_delete(opt, |
1510 | opt->call_depth ? orig->path : dest->path, | |
1511 | opt->call_depth ? NULL : orig->path, | |
8daec1df | 1512 | orig, dest, |
b26d87f2 | 1513 | rename_branch, delete_branch, |
75456f96 JS |
1514 | _("rename"), _("renamed"))) |
1515 | return -1; | |
e03acb8b | 1516 | |
259ccb6c EN |
1517 | if (opt->call_depth) |
1518 | return remove_file_from_index(opt->repo->index, dest->path); | |
75456f96 | 1519 | else |
259ccb6c EN |
1520 | return update_stages(opt, dest->path, NULL, |
1521 | rename_branch == opt->branch1 ? dest : NULL, | |
1522 | rename_branch == opt->branch1 ? NULL : dest); | |
6ef2cb00 EN |
1523 | } |
1524 | ||
259ccb6c | 1525 | static int handle_file_collision(struct merge_options *opt, |
37b65ce3 EN |
1526 | const char *collide_path, |
1527 | const char *prev_path1, | |
1528 | const char *prev_path2, | |
1529 | const char *branch1, const char *branch2, | |
8daec1df EN |
1530 | struct diff_filespec *a, |
1531 | struct diff_filespec *b) | |
3672c971 | 1532 | { |
37b65ce3 | 1533 | struct merge_file_info mfi; |
8daec1df | 1534 | struct diff_filespec null; |
37b65ce3 EN |
1535 | char *alt_path = NULL; |
1536 | const char *update_path = collide_path; | |
3672c971 | 1537 | |
7f867165 EN |
1538 | /* |
1539 | * It's easiest to get the correct things into stage 2 and 3, and | |
1540 | * to make sure that the content merge puts HEAD before the other | |
259ccb6c | 1541 | * branch if we just ensure that branch1 == opt->branch1. So, simply |
7f867165 EN |
1542 | * flip arguments around if we don't have that. |
1543 | */ | |
259ccb6c EN |
1544 | if (branch1 != opt->branch1) { |
1545 | return handle_file_collision(opt, collide_path, | |
7f867165 EN |
1546 | prev_path2, prev_path1, |
1547 | branch2, branch1, | |
8daec1df | 1548 | b, a); |
9047ebbc | 1549 | } |
3672c971 | 1550 | |
37b65ce3 EN |
1551 | /* |
1552 | * In the recursive case, we just opt to undo renames | |
1553 | */ | |
259ccb6c | 1554 | if (opt->call_depth && (prev_path1 || prev_path2)) { |
8daec1df | 1555 | /* Put first file (a->oid, a->mode) in its original spot */ |
37b65ce3 | 1556 | if (prev_path1) { |
8daec1df | 1557 | if (update_file(opt, 1, a, prev_path1)) |
37b65ce3 EN |
1558 | return -1; |
1559 | } else { | |
8daec1df | 1560 | if (update_file(opt, 1, a, collide_path)) |
37b65ce3 EN |
1561 | return -1; |
1562 | } | |
3672c971 | 1563 | |
8daec1df | 1564 | /* Put second file (b->oid, b->mode) in its original spot */ |
37b65ce3 | 1565 | if (prev_path2) { |
8daec1df | 1566 | if (update_file(opt, 1, b, prev_path2)) |
37b65ce3 EN |
1567 | return -1; |
1568 | } else { | |
8daec1df | 1569 | if (update_file(opt, 1, b, collide_path)) |
37b65ce3 | 1570 | return -1; |
18797a3b | 1571 | } |
37b65ce3 EN |
1572 | |
1573 | /* Don't leave something at collision path if unrenaming both */ | |
1574 | if (prev_path1 && prev_path2) | |
259ccb6c | 1575 | remove_file(opt, 1, collide_path, 0); |
37b65ce3 EN |
1576 | |
1577 | return 0; | |
1578 | } | |
1579 | ||
1580 | /* Remove rename sources if rename/add or rename/rename(2to1) */ | |
1581 | if (prev_path1) | |
259ccb6c EN |
1582 | remove_file(opt, 1, prev_path1, |
1583 | opt->call_depth || would_lose_untracked(opt, prev_path1)); | |
37b65ce3 | 1584 | if (prev_path2) |
259ccb6c EN |
1585 | remove_file(opt, 1, prev_path2, |
1586 | opt->call_depth || would_lose_untracked(opt, prev_path2)); | |
37b65ce3 EN |
1587 | |
1588 | /* | |
1589 | * Remove the collision path, if it wouldn't cause dirty contents | |
1590 | * or an untracked file to get lost. We'll either overwrite with | |
1591 | * merged contents, or just write out to differently named files. | |
1592 | */ | |
259ccb6c EN |
1593 | if (was_dirty(opt, collide_path)) { |
1594 | output(opt, 1, _("Refusing to lose dirty file at %s"), | |
37b65ce3 | 1595 | collide_path); |
259ccb6c EN |
1596 | update_path = alt_path = unique_path(opt, collide_path, "merged"); |
1597 | } else if (would_lose_untracked(opt, collide_path)) { | |
18797a3b | 1598 | /* |
37b65ce3 EN |
1599 | * Only way we get here is if both renames were from |
1600 | * a directory rename AND user had an untracked file | |
1601 | * at the location where both files end up after the | |
1602 | * two directory renames. See testcase 10d of t6043. | |
18797a3b | 1603 | */ |
259ccb6c | 1604 | output(opt, 1, _("Refusing to lose untracked file at " |
37b65ce3 EN |
1605 | "%s, even though it's in the way."), |
1606 | collide_path); | |
259ccb6c | 1607 | update_path = alt_path = unique_path(opt, collide_path, "merged"); |
3672c971 | 1608 | } else { |
37b65ce3 EN |
1609 | /* |
1610 | * FIXME: It's possible that the two files are identical | |
1611 | * and that the current working copy happens to match, in | |
1612 | * which case we are unnecessarily touching the working | |
1613 | * tree file. It's not a likely enough scenario that I | |
1614 | * want to code up the checks for it and a better fix is | |
1615 | * available if we restructure how unpack_trees() and | |
1616 | * merge-recursive interoperate anyway, so punting for | |
1617 | * now... | |
1618 | */ | |
259ccb6c | 1619 | remove_file(opt, 0, collide_path, 0); |
9047ebbc | 1620 | } |
3672c971 | 1621 | |
37b65ce3 | 1622 | /* Store things in diff_filespecs for functions that need it */ |
8daec1df | 1623 | null.path = (char *)collide_path; |
37b65ce3 EN |
1624 | oidcpy(&null.oid, &null_oid); |
1625 | null.mode = 0; | |
8daec1df EN |
1626 | |
1627 | if (merge_mode_and_contents(opt, &null, a, b, collide_path, | |
259ccb6c | 1628 | branch1, branch2, opt->call_depth * 2, &mfi)) |
37b65ce3 EN |
1629 | return -1; |
1630 | mfi.clean &= !alt_path; | |
8daec1df | 1631 | if (update_file(opt, mfi.clean, &mfi.blob, update_path)) |
37b65ce3 | 1632 | return -1; |
259ccb6c | 1633 | if (!mfi.clean && !opt->call_depth && |
8daec1df | 1634 | update_stages(opt, collide_path, NULL, a, b)) |
37b65ce3 EN |
1635 | return -1; |
1636 | free(alt_path); | |
1637 | /* | |
1638 | * FIXME: If both a & b both started with conflicts (only possible | |
1639 | * if they came from a rename/rename(2to1)), but had IDENTICAL | |
1640 | * contents including those conflicts, then in the next line we claim | |
1641 | * it was clean. If someone cares about this case, we should have the | |
1642 | * caller notify us if we started with conflicts. | |
1643 | */ | |
1644 | return mfi.clean; | |
1645 | } | |
7f867165 | 1646 | |
259ccb6c | 1647 | static int handle_rename_add(struct merge_options *opt, |
7f867165 EN |
1648 | struct rename_conflict_info *ci) |
1649 | { | |
1650 | /* a was renamed to c, and a separate c was added. */ | |
e9cd1b5c EN |
1651 | struct diff_filespec *a = ci->ren1->pair->one; |
1652 | struct diff_filespec *c = ci->ren1->pair->two; | |
7f867165 EN |
1653 | char *path = c->path; |
1654 | char *prev_path_desc; | |
1655 | struct merge_file_info mfi; | |
1656 | ||
c336ab85 EN |
1657 | const char *rename_branch = ci->ren1->branch; |
1658 | const char *add_branch = (opt->branch1 == rename_branch ? | |
1659 | opt->branch2 : opt->branch1); | |
1660 | int other_stage = (ci->ren1->branch == opt->branch1 ? 3 : 2); | |
7f867165 | 1661 | |
259ccb6c | 1662 | output(opt, 1, _("CONFLICT (rename/add): " |
7f867165 | 1663 | "Rename %s->%s in %s. Added %s in %s"), |
c336ab85 EN |
1664 | a->path, c->path, rename_branch, |
1665 | c->path, add_branch); | |
7f867165 EN |
1666 | |
1667 | prev_path_desc = xstrfmt("version of %s from %s", path, a->path); | |
481de8a2 | 1668 | ci->ren1->src_entry->stages[other_stage].path = a->path; |
8daec1df EN |
1669 | if (merge_mode_and_contents(opt, a, c, |
1670 | &ci->ren1->src_entry->stages[other_stage], | |
3f9c92ec | 1671 | prev_path_desc, |
259ccb6c EN |
1672 | opt->branch1, opt->branch2, |
1673 | 1 + opt->call_depth * 2, &mfi)) | |
7f867165 EN |
1674 | return -1; |
1675 | free(prev_path_desc); | |
1676 | ||
8daec1df | 1677 | ci->ren1->dst_entry->stages[other_stage].path = mfi.blob.path = c->path; |
259ccb6c | 1678 | return handle_file_collision(opt, |
7f867165 | 1679 | c->path, a->path, NULL, |
c336ab85 | 1680 | rename_branch, add_branch, |
8daec1df EN |
1681 | &mfi.blob, |
1682 | &ci->ren1->dst_entry->stages[other_stage]); | |
7f867165 | 1683 | } |
37b65ce3 | 1684 | |
259ccb6c | 1685 | static char *find_path_for_conflict(struct merge_options *opt, |
80cee6e3 DS |
1686 | const char *path, |
1687 | const char *branch1, | |
1688 | const char *branch2) | |
1689 | { | |
1690 | char *new_path = NULL; | |
259ccb6c EN |
1691 | if (dir_in_way(opt->repo->index, path, !opt->call_depth, 0)) { |
1692 | new_path = unique_path(opt, path, branch1); | |
1693 | output(opt, 1, _("%s is a directory in %s adding " | |
80cee6e3 DS |
1694 | "as %s instead"), |
1695 | path, branch2, new_path); | |
259ccb6c EN |
1696 | } else if (would_lose_untracked(opt, path)) { |
1697 | new_path = unique_path(opt, path, branch1); | |
1698 | output(opt, 1, _("Refusing to lose untracked file" | |
80cee6e3 DS |
1699 | " at %s; adding as %s instead"), |
1700 | path, new_path); | |
1701 | } | |
1702 | ||
1703 | return new_path; | |
3672c971 EN |
1704 | } |
1705 | ||
259ccb6c | 1706 | static int handle_rename_rename_1to2(struct merge_options *opt, |
8ebe7b05 | 1707 | struct rename_conflict_info *ci) |
9047ebbc | 1708 | { |
09c01f85 | 1709 | /* One file was renamed in both branches, but to different names. */ |
48c9cb9d | 1710 | struct merge_file_info mfi; |
48c9cb9d | 1711 | struct diff_filespec *add; |
e9cd1b5c EN |
1712 | struct diff_filespec *o = ci->ren1->pair->one; |
1713 | struct diff_filespec *a = ci->ren1->pair->two; | |
1714 | struct diff_filespec *b = ci->ren2->pair->two; | |
48c9cb9d | 1715 | char *path_desc; |
4f66dade | 1716 | |
259ccb6c | 1717 | output(opt, 1, _("CONFLICT (rename/rename): " |
4f66dade | 1718 | "Rename \"%s\"->\"%s\" in branch \"%s\" " |
55653a68 | 1719 | "rename \"%s\"->\"%s\" in \"%s\"%s"), |
c336ab85 EN |
1720 | o->path, a->path, ci->ren1->branch, |
1721 | o->path, b->path, ci->ren2->branch, | |
259ccb6c | 1722 | opt->call_depth ? _(" (left unresolved)") : ""); |
75456f96 | 1723 | |
48c9cb9d | 1724 | path_desc = xstrfmt("%s and %s, both renamed from %s", |
e3de888c EN |
1725 | a->path, b->path, o->path); |
1726 | if (merge_mode_and_contents(opt, o, a, b, path_desc, | |
c336ab85 | 1727 | ci->ren1->branch, ci->ren2->branch, |
259ccb6c | 1728 | opt->call_depth * 2, &mfi)) |
48c9cb9d EN |
1729 | return -1; |
1730 | free(path_desc); | |
1731 | ||
259ccb6c | 1732 | if (opt->call_depth) { |
9047ebbc | 1733 | /* |
c52ff85d EN |
1734 | * FIXME: For rename/add-source conflicts (if we could detect |
1735 | * such), this is wrong. We should instead find a unique | |
1736 | * pathname and then either rename the add-source file to that | |
1737 | * unique path, or use that unique path instead of src here. | |
9047ebbc | 1738 | */ |
8daec1df | 1739 | if (update_file(opt, 0, &mfi.blob, o->path)) |
75456f96 | 1740 | return -1; |
07413c5a | 1741 | |
6d63070c EN |
1742 | /* |
1743 | * Above, we put the merged content at the merge-base's | |
1744 | * path. Now we usually need to delete both a->path and | |
1745 | * b->path. However, the rename on each side of the merge | |
1746 | * could also be involved in a rename/add conflict. In | |
1747 | * such cases, we should keep the added file around, | |
1748 | * resolving the conflict at that path in its favor. | |
1749 | */ | |
8daec1df EN |
1750 | add = &ci->ren1->dst_entry->stages[2 ^ 1]; |
1751 | if (is_valid(add)) { | |
1752 | if (update_file(opt, 0, add, a->path)) | |
75456f96 JS |
1753 | return -1; |
1754 | } | |
6d63070c | 1755 | else |
259ccb6c | 1756 | remove_file_from_index(opt->repo->index, a->path); |
8daec1df EN |
1757 | add = &ci->ren2->dst_entry->stages[3 ^ 1]; |
1758 | if (is_valid(add)) { | |
1759 | if (update_file(opt, 0, add, b->path)) | |
75456f96 JS |
1760 | return -1; |
1761 | } | |
6d63070c | 1762 | else |
259ccb6c | 1763 | remove_file_from_index(opt->repo->index, b->path); |
48c9cb9d EN |
1764 | } else { |
1765 | /* | |
1766 | * For each destination path, we need to see if there is a | |
1767 | * rename/add collision. If not, we can write the file out | |
1768 | * to the specified location. | |
1769 | */ | |
8daec1df EN |
1770 | add = &ci->ren1->dst_entry->stages[2 ^ 1]; |
1771 | if (is_valid(add)) { | |
1772 | add->path = mfi.blob.path = a->path; | |
259ccb6c | 1773 | if (handle_file_collision(opt, a->path, |
48c9cb9d | 1774 | NULL, NULL, |
c336ab85 EN |
1775 | ci->ren1->branch, |
1776 | ci->ren2->branch, | |
8daec1df | 1777 | &mfi.blob, add) < 0) |
48c9cb9d EN |
1778 | return -1; |
1779 | } else { | |
259ccb6c | 1780 | char *new_path = find_path_for_conflict(opt, a->path, |
c336ab85 EN |
1781 | ci->ren1->branch, |
1782 | ci->ren2->branch); | |
8daec1df EN |
1783 | if (update_file(opt, 0, &mfi.blob, |
1784 | new_path ? new_path : a->path)) | |
48c9cb9d EN |
1785 | return -1; |
1786 | free(new_path); | |
259ccb6c | 1787 | if (update_stages(opt, a->path, NULL, a, NULL)) |
48c9cb9d EN |
1788 | return -1; |
1789 | } | |
1790 | ||
8daec1df EN |
1791 | add = &ci->ren2->dst_entry->stages[3 ^ 1]; |
1792 | if (is_valid(add)) { | |
1793 | add->path = mfi.blob.path = b->path; | |
259ccb6c | 1794 | if (handle_file_collision(opt, b->path, |
48c9cb9d | 1795 | NULL, NULL, |
c336ab85 EN |
1796 | ci->ren1->branch, |
1797 | ci->ren2->branch, | |
8daec1df | 1798 | add, &mfi.blob) < 0) |
48c9cb9d EN |
1799 | return -1; |
1800 | } else { | |
259ccb6c | 1801 | char *new_path = find_path_for_conflict(opt, b->path, |
c336ab85 EN |
1802 | ci->ren2->branch, |
1803 | ci->ren1->branch); | |
8daec1df EN |
1804 | if (update_file(opt, 0, &mfi.blob, |
1805 | new_path ? new_path : b->path)) | |
48c9cb9d EN |
1806 | return -1; |
1807 | free(new_path); | |
259ccb6c | 1808 | if (update_stages(opt, b->path, NULL, NULL, b)) |
48c9cb9d EN |
1809 | return -1; |
1810 | } | |
1811 | } | |
75456f96 JS |
1812 | |
1813 | return 0; | |
9047ebbc MV |
1814 | } |
1815 | ||
259ccb6c | 1816 | static int handle_rename_rename_2to1(struct merge_options *opt, |
8ebe7b05 | 1817 | struct rename_conflict_info *ci) |
9047ebbc | 1818 | { |
461f5041 | 1819 | /* Two files, a & b, were renamed to the same thing, c. */ |
e9cd1b5c EN |
1820 | struct diff_filespec *a = ci->ren1->pair->one; |
1821 | struct diff_filespec *b = ci->ren2->pair->one; | |
1822 | struct diff_filespec *c1 = ci->ren1->pair->two; | |
1823 | struct diff_filespec *c2 = ci->ren2->pair->two; | |
461f5041 | 1824 | char *path = c1->path; /* == c2->path */ |
05cf21eb EN |
1825 | char *path_side_1_desc; |
1826 | char *path_side_2_desc; | |
434b8525 EN |
1827 | struct merge_file_info mfi_c1; |
1828 | struct merge_file_info mfi_c2; | |
8daec1df | 1829 | int ostage1, ostage2; |
461f5041 | 1830 | |
259ccb6c | 1831 | output(opt, 1, _("CONFLICT (rename/rename): " |
461f5041 | 1832 | "Rename %s->%s in %s. " |
55653a68 | 1833 | "Rename %s->%s in %s"), |
c336ab85 EN |
1834 | a->path, c1->path, ci->ren1->branch, |
1835 | b->path, c2->path, ci->ren2->branch); | |
461f5041 | 1836 | |
2b168ef3 EN |
1837 | path_side_1_desc = xstrfmt("version of %s from %s", path, a->path); |
1838 | path_side_2_desc = xstrfmt("version of %s from %s", path, b->path); | |
8daec1df EN |
1839 | ostage1 = ci->ren1->branch == opt->branch1 ? 3 : 2; |
1840 | ostage2 = ostage1 ^ 1; | |
1841 | ci->ren1->src_entry->stages[ostage1].path = a->path; | |
1842 | ci->ren2->src_entry->stages[ostage2].path = b->path; | |
1843 | if (merge_mode_and_contents(opt, a, c1, | |
1844 | &ci->ren1->src_entry->stages[ostage1], | |
1845 | path_side_1_desc, | |
259ccb6c EN |
1846 | opt->branch1, opt->branch2, |
1847 | 1 + opt->call_depth * 2, &mfi_c1) || | |
8daec1df EN |
1848 | merge_mode_and_contents(opt, b, |
1849 | &ci->ren2->src_entry->stages[ostage2], | |
1850 | c2, path_side_2_desc, | |
259ccb6c EN |
1851 | opt->branch1, opt->branch2, |
1852 | 1 + opt->call_depth * 2, &mfi_c2)) | |
75456f96 | 1853 | return -1; |
05cf21eb EN |
1854 | free(path_side_1_desc); |
1855 | free(path_side_2_desc); | |
8daec1df EN |
1856 | mfi_c1.blob.path = path; |
1857 | mfi_c2.blob.path = path; | |
434b8525 | 1858 | |
259ccb6c | 1859 | return handle_file_collision(opt, path, a->path, b->path, |
c336ab85 | 1860 | ci->ren1->branch, ci->ren2->branch, |
8daec1df | 1861 | &mfi_c1.blob, &mfi_c2.blob); |
9047ebbc MV |
1862 | } |
1863 | ||
9ba91557 | 1864 | /* |
e5257b2a | 1865 | * Get the diff_filepairs changed between o_tree and tree. |
9ba91557 | 1866 | */ |
259ccb6c | 1867 | static struct diff_queue_struct *get_diffpairs(struct merge_options *opt, |
e5257b2a EN |
1868 | struct tree *o_tree, |
1869 | struct tree *tree) | |
9ba91557 | 1870 | { |
e5257b2a | 1871 | struct diff_queue_struct *ret; |
9ba91557 EN |
1872 | struct diff_options opts; |
1873 | ||
259ccb6c | 1874 | repo_diff_setup(opt->repo, &opts); |
9ba91557 EN |
1875 | opts.flags.recursive = 1; |
1876 | opts.flags.rename_empty = 0; | |
259ccb6c | 1877 | opts.detect_rename = merge_detect_rename(opt); |
85b46030 BP |
1878 | /* |
1879 | * We do not have logic to handle the detection of copies. In | |
1880 | * fact, it may not even make sense to add such logic: would we | |
1881 | * really want a change to a base file to be propagated through | |
1882 | * multiple other files by a merge? | |
1883 | */ | |
1884 | if (opts.detect_rename > DIFF_DETECT_RENAME) | |
1885 | opts.detect_rename = DIFF_DETECT_RENAME; | |
259ccb6c EN |
1886 | opts.rename_limit = opt->merge_rename_limit >= 0 ? opt->merge_rename_limit : |
1887 | opt->diff_rename_limit >= 0 ? opt->diff_rename_limit : | |
9ba91557 | 1888 | 1000; |
259ccb6c EN |
1889 | opts.rename_score = opt->rename_score; |
1890 | opts.show_rename_progress = opt->show_rename_progress; | |
9ba91557 EN |
1891 | opts.output_format = DIFF_FORMAT_NO_OUTPUT; |
1892 | diff_setup_done(&opts); | |
1893 | diff_tree_oid(&o_tree->object.oid, &tree->object.oid, "", &opts); | |
1894 | diffcore_std(&opts); | |
259ccb6c EN |
1895 | if (opts.needed_rename_limit > opt->needed_rename_limit) |
1896 | opt->needed_rename_limit = opts.needed_rename_limit; | |
e5257b2a EN |
1897 | |
1898 | ret = xmalloc(sizeof(*ret)); | |
1899 | *ret = diff_queued_diff; | |
1900 | ||
1901 | opts.output_format = DIFF_FORMAT_NO_OUTPUT; | |
1902 | diff_queued_diff.nr = 0; | |
1903 | diff_queued_diff.queue = NULL; | |
1904 | diff_flush(&opts); | |
1905 | return ret; | |
1906 | } | |
1907 | ||
34e7771b NTND |
1908 | static int tree_has_path(struct repository *r, struct tree *tree, |
1909 | const char *path) | |
96e7ffbd EN |
1910 | { |
1911 | struct object_id hashy; | |
5ec1e728 | 1912 | unsigned short mode_o; |
96e7ffbd | 1913 | |
34e7771b | 1914 | return !get_tree_entry(r, |
50ddb089 | 1915 | &tree->object.oid, path, |
96e7ffbd EN |
1916 | &hashy, &mode_o); |
1917 | } | |
1918 | ||
e95ab70a EN |
1919 | /* |
1920 | * Return a new string that replaces the beginning portion (which matches | |
1921 | * entry->dir), with entry->new_dir. In perl-speak: | |
1922 | * new_path_name = (old_path =~ s/entry->dir/entry->new_dir/); | |
1923 | * NOTE: | |
1924 | * Caller must ensure that old_path starts with entry->dir + '/'. | |
1925 | */ | |
1926 | static char *apply_dir_rename(struct dir_rename_entry *entry, | |
1927 | const char *old_path) | |
1928 | { | |
1929 | struct strbuf new_path = STRBUF_INIT; | |
1930 | int oldlen, newlen; | |
1931 | ||
1932 | if (entry->non_unique_new_dir) | |
1933 | return NULL; | |
1934 | ||
1935 | oldlen = strlen(entry->dir); | |
1936 | newlen = entry->new_dir.len + (strlen(old_path) - oldlen) + 1; | |
1937 | strbuf_grow(&new_path, newlen); | |
1938 | strbuf_addbuf(&new_path, &entry->new_dir); | |
1939 | strbuf_addstr(&new_path, &old_path[oldlen]); | |
1940 | ||
1941 | return strbuf_detach(&new_path, NULL); | |
1942 | } | |
1943 | ||
7fe40b88 EN |
1944 | static void get_renamed_dir_portion(const char *old_path, const char *new_path, |
1945 | char **old_dir, char **new_dir) | |
1946 | { | |
1947 | char *end_of_old, *end_of_new; | |
1948 | int old_len, new_len; | |
1949 | ||
1950 | *old_dir = NULL; | |
1951 | *new_dir = NULL; | |
1952 | ||
1953 | /* | |
1954 | * For | |
1955 | * "a/b/c/d/e/foo.c" -> "a/b/some/thing/else/e/foo.c" | |
1956 | * the "e/foo.c" part is the same, we just want to know that | |
1957 | * "a/b/c/d" was renamed to "a/b/some/thing/else" | |
1958 | * so, for this example, this function returns "a/b/c/d" in | |
1959 | * *old_dir and "a/b/some/thing/else" in *new_dir. | |
1960 | * | |
1961 | * Also, if the basename of the file changed, we don't care. We | |
1962 | * want to know which portion of the directory, if any, changed. | |
1963 | */ | |
1964 | end_of_old = strrchr(old_path, '/'); | |
1965 | end_of_new = strrchr(new_path, '/'); | |
1966 | ||
1967 | if (end_of_old == NULL || end_of_new == NULL) | |
1968 | return; | |
1969 | while (*--end_of_new == *--end_of_old && | |
1970 | end_of_old != old_path && | |
1971 | end_of_new != new_path) | |
1972 | ; /* Do nothing; all in the while loop */ | |
1973 | /* | |
1974 | * We've found the first non-matching character in the directory | |
1975 | * paths. That means the current directory we were comparing | |
1976 | * represents the rename. Move end_of_old and end_of_new back | |
1977 | * to the full directory name. | |
1978 | */ | |
1979 | if (*end_of_old == '/') | |
1980 | end_of_old++; | |
1981 | if (*end_of_old != '/') | |
1982 | end_of_new++; | |
1983 | end_of_old = strchr(end_of_old, '/'); | |
1984 | end_of_new = strchr(end_of_new, '/'); | |
1985 | ||
1986 | /* | |
1987 | * It may have been the case that old_path and new_path were the same | |
1988 | * directory all along. Don't claim a rename if they're the same. | |
1989 | */ | |
1990 | old_len = end_of_old - old_path; | |
1991 | new_len = end_of_new - new_path; | |
1992 | ||
1993 | if (old_len != new_len || strncmp(old_path, new_path, old_len)) { | |
1994 | *old_dir = xstrndup(old_path, old_len); | |
1995 | *new_dir = xstrndup(new_path, new_len); | |
1996 | } | |
1997 | } | |
1998 | ||
96e7ffbd EN |
1999 | static void remove_hashmap_entries(struct hashmap *dir_renames, |
2000 | struct string_list *items_to_remove) | |
2001 | { | |
2002 | int i; | |
2003 | struct dir_rename_entry *entry; | |
2004 | ||
2005 | for (i = 0; i < items_to_remove->nr; i++) { | |
2006 | entry = items_to_remove->items[i].util; | |
2007 | hashmap_remove(dir_renames, entry, NULL); | |
2008 | } | |
2009 | string_list_clear(items_to_remove, 0); | |
2010 | } | |
2011 | ||
f6f77559 EN |
2012 | /* |
2013 | * See if there is a directory rename for path, and if there are any file | |
2014 | * level conflicts for the renamed location. If there is a rename and | |
2015 | * there are no conflicts, return the new name. Otherwise, return NULL. | |
2016 | */ | |
259ccb6c | 2017 | static char *handle_path_level_conflicts(struct merge_options *opt, |
f6f77559 EN |
2018 | const char *path, |
2019 | struct dir_rename_entry *entry, | |
2020 | struct hashmap *collisions, | |
2021 | struct tree *tree) | |
2022 | { | |
2023 | char *new_path = NULL; | |
2024 | struct collision_entry *collision_ent; | |
2025 | int clean = 1; | |
2026 | struct strbuf collision_paths = STRBUF_INIT; | |
2027 | ||
2028 | /* | |
2029 | * entry has the mapping of old directory name to new directory name | |
2030 | * that we want to apply to path. | |
2031 | */ | |
2032 | new_path = apply_dir_rename(entry, path); | |
2033 | ||
2034 | if (!new_path) { | |
2035 | /* This should only happen when entry->non_unique_new_dir set */ | |
2036 | if (!entry->non_unique_new_dir) | |
2037 | BUG("entry->non_unqiue_dir not set and !new_path"); | |
259ccb6c | 2038 | output(opt, 1, _("CONFLICT (directory rename split): " |
f6f77559 EN |
2039 | "Unclear where to place %s because directory " |
2040 | "%s was renamed to multiple other directories, " | |
2041 | "with no destination getting a majority of the " | |
2042 | "files."), | |
2043 | path, entry->dir); | |
2044 | clean = 0; | |
2045 | return NULL; | |
2046 | } | |
2047 | ||
2048 | /* | |
2049 | * The caller needs to have ensured that it has pre-populated | |
2050 | * collisions with all paths that map to new_path. Do a quick check | |
2051 | * to ensure that's the case. | |
2052 | */ | |
2053 | collision_ent = collision_find_entry(collisions, new_path); | |
2054 | if (collision_ent == NULL) | |
2055 | BUG("collision_ent is NULL"); | |
2056 | ||
2057 | /* | |
2058 | * Check for one-sided add/add/.../add conflicts, i.e. | |
2059 | * where implicit renames from the other side doing | |
2060 | * directory rename(s) can affect this side of history | |
2061 | * to put multiple paths into the same location. Warn | |
2062 | * and bail on directory renames for such paths. | |
2063 | */ | |
2064 | if (collision_ent->reported_already) { | |
2065 | clean = 0; | |
34e7771b | 2066 | } else if (tree_has_path(opt->repo, tree, new_path)) { |
f6f77559 EN |
2067 | collision_ent->reported_already = 1; |
2068 | strbuf_add_separated_string_list(&collision_paths, ", ", | |
2069 | &collision_ent->source_files); | |
259ccb6c | 2070 | output(opt, 1, _("CONFLICT (implicit dir rename): Existing " |
f6f77559 EN |
2071 | "file/dir at %s in the way of implicit " |
2072 | "directory rename(s) putting the following " | |
2073 | "path(s) there: %s."), | |
2074 | new_path, collision_paths.buf); | |
2075 | clean = 0; | |
2076 | } else if (collision_ent->source_files.nr > 1) { | |
2077 | collision_ent->reported_already = 1; | |
2078 | strbuf_add_separated_string_list(&collision_paths, ", ", | |
2079 | &collision_ent->source_files); | |
259ccb6c | 2080 | output(opt, 1, _("CONFLICT (implicit dir rename): Cannot map " |
f6f77559 EN |
2081 | "more than one path to %s; implicit directory " |
2082 | "renames tried to put these paths there: %s"), | |
2083 | new_path, collision_paths.buf); | |
2084 | clean = 0; | |
2085 | } | |
2086 | ||
2087 | /* Free memory we no longer need */ | |
2088 | strbuf_release(&collision_paths); | |
2089 | if (!clean && new_path) { | |
2090 | free(new_path); | |
2091 | return NULL; | |
2092 | } | |
2093 | ||
2094 | return new_path; | |
2095 | } | |
2096 | ||
96e7ffbd EN |
2097 | /* |
2098 | * There are a couple things we want to do at the directory level: | |
2099 | * 1. Check for both sides renaming to the same thing, in order to avoid | |
2100 | * implicit renaming of files that should be left in place. (See | |
2101 | * testcase 6b in t6043 for details.) | |
2102 | * 2. Prune directory renames if there are still files left in the | |
2103 | * the original directory. These represent a partial directory rename, | |
2104 | * i.e. a rename where only some of the files within the directory | |
2105 | * were renamed elsewhere. (Technically, this could be done earlier | |
2106 | * in get_directory_renames(), except that would prevent us from | |
2107 | * doing the previous check and thus failing testcase 6b.) | |
2108 | * 3. Check for rename/rename(1to2) conflicts (at the directory level). | |
2109 | * In the future, we could potentially record this info as well and | |
2110 | * omit reporting rename/rename(1to2) conflicts for each path within | |
2111 | * the affected directories, thus cleaning up the merge output. | |
2112 | * NOTE: We do NOT check for rename/rename(2to1) conflicts at the | |
2113 | * directory level, because merging directories is fine. If it | |
2114 | * causes conflicts for files within those merged directories, then | |
2115 | * that should be detected at the individual path level. | |
2116 | */ | |
259ccb6c | 2117 | static void handle_directory_level_conflicts(struct merge_options *opt, |
96e7ffbd EN |
2118 | struct hashmap *dir_re_head, |
2119 | struct tree *head, | |
2120 | struct hashmap *dir_re_merge, | |
2121 | struct tree *merge) | |
2122 | { | |
2123 | struct hashmap_iter iter; | |
2124 | struct dir_rename_entry *head_ent; | |
2125 | struct dir_rename_entry *merge_ent; | |
2126 | ||
2127 | struct string_list remove_from_head = STRING_LIST_INIT_NODUP; | |
2128 | struct string_list remove_from_merge = STRING_LIST_INIT_NODUP; | |
2129 | ||
2130 | hashmap_iter_init(dir_re_head, &iter); | |
2131 | while ((head_ent = hashmap_iter_next(&iter))) { | |
2132 | merge_ent = dir_rename_find_entry(dir_re_merge, head_ent->dir); | |
2133 | if (merge_ent && | |
2134 | !head_ent->non_unique_new_dir && | |
2135 | !merge_ent->non_unique_new_dir && | |
2136 | !strbuf_cmp(&head_ent->new_dir, &merge_ent->new_dir)) { | |
2137 | /* 1. Renamed identically; remove it from both sides */ | |
2138 | string_list_append(&remove_from_head, | |
2139 | head_ent->dir)->util = head_ent; | |
2140 | strbuf_release(&head_ent->new_dir); | |
2141 | string_list_append(&remove_from_merge, | |
2142 | merge_ent->dir)->util = merge_ent; | |
2143 | strbuf_release(&merge_ent->new_dir); | |
34e7771b | 2144 | } else if (tree_has_path(opt->repo, head, head_ent->dir)) { |
96e7ffbd EN |
2145 | /* 2. This wasn't a directory rename after all */ |
2146 | string_list_append(&remove_from_head, | |
2147 | head_ent->dir)->util = head_ent; | |
2148 | strbuf_release(&head_ent->new_dir); | |
2149 | } | |
2150 | } | |
2151 | ||
2152 | remove_hashmap_entries(dir_re_head, &remove_from_head); | |
2153 | remove_hashmap_entries(dir_re_merge, &remove_from_merge); | |
2154 | ||
2155 | hashmap_iter_init(dir_re_merge, &iter); | |
2156 | while ((merge_ent = hashmap_iter_next(&iter))) { | |
2157 | head_ent = dir_rename_find_entry(dir_re_head, merge_ent->dir); | |
34e7771b | 2158 | if (tree_has_path(opt->repo, merge, merge_ent->dir)) { |
96e7ffbd EN |
2159 | /* 2. This wasn't a directory rename after all */ |
2160 | string_list_append(&remove_from_merge, | |
2161 | merge_ent->dir)->util = merge_ent; | |
2162 | } else if (head_ent && | |
2163 | !head_ent->non_unique_new_dir && | |
2164 | !merge_ent->non_unique_new_dir) { | |
2165 | /* 3. rename/rename(1to2) */ | |
2166 | /* | |
2167 | * We can assume it's not rename/rename(1to1) because | |
2168 | * that was case (1), already checked above. So we | |
2169 | * know that head_ent->new_dir and merge_ent->new_dir | |
2170 | * are different strings. | |
2171 | */ | |
259ccb6c | 2172 | output(opt, 1, _("CONFLICT (rename/rename): " |
96e7ffbd EN |
2173 | "Rename directory %s->%s in %s. " |
2174 | "Rename directory %s->%s in %s"), | |
259ccb6c EN |
2175 | head_ent->dir, head_ent->new_dir.buf, opt->branch1, |
2176 | head_ent->dir, merge_ent->new_dir.buf, opt->branch2); | |
96e7ffbd EN |
2177 | string_list_append(&remove_from_head, |
2178 | head_ent->dir)->util = head_ent; | |
2179 | strbuf_release(&head_ent->new_dir); | |
2180 | string_list_append(&remove_from_merge, | |
2181 | merge_ent->dir)->util = merge_ent; | |
2182 | strbuf_release(&merge_ent->new_dir); | |
2183 | } | |
2184 | } | |
2185 | ||
2186 | remove_hashmap_entries(dir_re_head, &remove_from_head); | |
2187 | remove_hashmap_entries(dir_re_merge, &remove_from_merge); | |
2188 | } | |
2189 | ||
b53c5028 | 2190 | static struct hashmap *get_directory_renames(struct diff_queue_struct *pairs) |
7fe40b88 EN |
2191 | { |
2192 | struct hashmap *dir_renames; | |
2193 | struct hashmap_iter iter; | |
2194 | struct dir_rename_entry *entry; | |
2195 | int i; | |
2196 | ||
2197 | /* | |
2198 | * Typically, we think of a directory rename as all files from a | |
2199 | * certain directory being moved to a target directory. However, | |
2200 | * what if someone first moved two files from the original | |
2201 | * directory in one commit, and then renamed the directory | |
2202 | * somewhere else in a later commit? At merge time, we just know | |
2203 | * that files from the original directory went to two different | |
2204 | * places, and that the bulk of them ended up in the same place. | |
2205 | * We want each directory rename to represent where the bulk of the | |
2206 | * files from that directory end up; this function exists to find | |
2207 | * where the bulk of the files went. | |
2208 | * | |
2209 | * The first loop below simply iterates through the list of file | |
2210 | * renames, finding out how often each directory rename pair | |
2211 | * possibility occurs. | |
2212 | */ | |
2213 | dir_renames = xmalloc(sizeof(*dir_renames)); | |
2214 | dir_rename_init(dir_renames); | |
2215 | for (i = 0; i < pairs->nr; ++i) { | |
2216 | struct string_list_item *item; | |
2217 | int *count; | |
2218 | struct diff_filepair *pair = pairs->queue[i]; | |
2219 | char *old_dir, *new_dir; | |
2220 | ||
2221 | /* File not part of directory rename if it wasn't renamed */ | |
2222 | if (pair->status != 'R') | |
2223 | continue; | |
2224 | ||
2225 | get_renamed_dir_portion(pair->one->path, pair->two->path, | |
2226 | &old_dir, &new_dir); | |
2227 | if (!old_dir) | |
2228 | /* Directory didn't change at all; ignore this one. */ | |
2229 | continue; | |
2230 | ||
2231 | entry = dir_rename_find_entry(dir_renames, old_dir); | |
2232 | if (!entry) { | |
2233 | entry = xmalloc(sizeof(*entry)); | |
2234 | dir_rename_entry_init(entry, old_dir); | |
2235 | hashmap_put(dir_renames, entry); | |
2236 | } else { | |
2237 | free(old_dir); | |
2238 | } | |
2239 | item = string_list_lookup(&entry->possible_new_dirs, new_dir); | |
2240 | if (!item) { | |
2241 | item = string_list_insert(&entry->possible_new_dirs, | |
2242 | new_dir); | |
2243 | item->util = xcalloc(1, sizeof(int)); | |
2244 | } else { | |
2245 | free(new_dir); | |
2246 | } | |
2247 | count = item->util; | |
2248 | *count += 1; | |
2249 | } | |
2250 | ||
2251 | /* | |
2252 | * For each directory with files moved out of it, we find out which | |
2253 | * target directory received the most files so we can declare it to | |
2254 | * be the "winning" target location for the directory rename. This | |
2255 | * winner gets recorded in new_dir. If there is no winner | |
2256 | * (multiple target directories received the same number of files), | |
2257 | * we set non_unique_new_dir. Once we've determined the winner (or | |
2258 | * that there is no winner), we no longer need possible_new_dirs. | |
2259 | */ | |
2260 | hashmap_iter_init(dir_renames, &iter); | |
2261 | while ((entry = hashmap_iter_next(&iter))) { | |
2262 | int max = 0; | |
2263 | int bad_max = 0; | |
2264 | char *best = NULL; | |
2265 | ||
2266 | for (i = 0; i < entry->possible_new_dirs.nr; i++) { | |
2267 | int *count = entry->possible_new_dirs.items[i].util; | |
2268 | ||
2269 | if (*count == max) | |
2270 | bad_max = max; | |
2271 | else if (*count > max) { | |
2272 | max = *count; | |
2273 | best = entry->possible_new_dirs.items[i].string; | |
2274 | } | |
2275 | } | |
2276 | if (bad_max == max) | |
2277 | entry->non_unique_new_dir = 1; | |
2278 | else { | |
2279 | assert(entry->new_dir.len == 0); | |
2280 | strbuf_addstr(&entry->new_dir, best); | |
2281 | } | |
2282 | /* | |
2283 | * The relevant directory sub-portion of the original full | |
2284 | * filepaths were xstrndup'ed before inserting into | |
2285 | * possible_new_dirs, and instead of manually iterating the | |
2286 | * list and free'ing each, just lie and tell | |
2287 | * possible_new_dirs that it did the strdup'ing so that it | |
2288 | * will free them for us. | |
2289 | */ | |
2290 | entry->possible_new_dirs.strdup_strings = 1; | |
2291 | string_list_clear(&entry->possible_new_dirs, 1); | |
2292 | } | |
2293 | ||
2294 | return dir_renames; | |
2295 | } | |
2296 | ||
e95ab70a EN |
2297 | static struct dir_rename_entry *check_dir_renamed(const char *path, |
2298 | struct hashmap *dir_renames) | |
2299 | { | |
9da2d037 | 2300 | char *temp = xstrdup(path); |
e95ab70a | 2301 | char *end; |
c3b9bc94 | 2302 | struct dir_rename_entry *entry = NULL; |
e95ab70a | 2303 | |
e95ab70a EN |
2304 | while ((end = strrchr(temp, '/'))) { |
2305 | *end = '\0'; | |
2306 | entry = dir_rename_find_entry(dir_renames, temp); | |
2307 | if (entry) | |
9da2d037 | 2308 | break; |
e95ab70a | 2309 | } |
9da2d037 RS |
2310 | free(temp); |
2311 | return entry; | |
e95ab70a EN |
2312 | } |
2313 | ||
2314 | static void compute_collisions(struct hashmap *collisions, | |
2315 | struct hashmap *dir_renames, | |
2316 | struct diff_queue_struct *pairs) | |
2317 | { | |
2318 | int i; | |
2319 | ||
2320 | /* | |
2321 | * Multiple files can be mapped to the same path due to directory | |
2322 | * renames done by the other side of history. Since that other | |
2323 | * side of history could have merged multiple directories into one, | |
2324 | * if our side of history added the same file basename to each of | |
2325 | * those directories, then all N of them would get implicitly | |
2326 | * renamed by the directory rename detection into the same path, | |
2327 | * and we'd get an add/add/.../add conflict, and all those adds | |
2328 | * from *this* side of history. This is not representable in the | |
2329 | * index, and users aren't going to easily be able to make sense of | |
2330 | * it. So we need to provide a good warning about what's | |
2331 | * happening, and fall back to no-directory-rename detection | |
2332 | * behavior for those paths. | |
2333 | * | |
2334 | * See testcases 9e and all of section 5 from t6043 for examples. | |
2335 | */ | |
2336 | collision_init(collisions); | |
2337 | ||
2338 | for (i = 0; i < pairs->nr; ++i) { | |
2339 | struct dir_rename_entry *dir_rename_ent; | |
2340 | struct collision_entry *collision_ent; | |
2341 | char *new_path; | |
2342 | struct diff_filepair *pair = pairs->queue[i]; | |
2343 | ||
6e7e027f | 2344 | if (pair->status != 'A' && pair->status != 'R') |
e95ab70a EN |
2345 | continue; |
2346 | dir_rename_ent = check_dir_renamed(pair->two->path, | |
2347 | dir_renames); | |
2348 | if (!dir_rename_ent) | |
2349 | continue; | |
2350 | ||
2351 | new_path = apply_dir_rename(dir_rename_ent, pair->two->path); | |
2352 | if (!new_path) | |
2353 | /* | |
2354 | * dir_rename_ent->non_unique_new_path is true, which | |
2355 | * means there is no directory rename for us to use, | |
2356 | * which means it won't cause us any additional | |
2357 | * collisions. | |
2358 | */ | |
2359 | continue; | |
2360 | collision_ent = collision_find_entry(collisions, new_path); | |
2361 | if (!collision_ent) { | |
2362 | collision_ent = xcalloc(1, | |
2363 | sizeof(struct collision_entry)); | |
2364 | hashmap_entry_init(collision_ent, strhash(new_path)); | |
2365 | hashmap_put(collisions, collision_ent); | |
2366 | collision_ent->target_file = new_path; | |
2367 | } else { | |
2368 | free(new_path); | |
2369 | } | |
2370 | string_list_insert(&collision_ent->source_files, | |
2371 | pair->two->path); | |
2372 | } | |
2373 | } | |
2374 | ||
259ccb6c | 2375 | static char *check_for_directory_rename(struct merge_options *opt, |
f6f77559 EN |
2376 | const char *path, |
2377 | struct tree *tree, | |
2378 | struct hashmap *dir_renames, | |
2379 | struct hashmap *dir_rename_exclusions, | |
2380 | struct hashmap *collisions, | |
2381 | int *clean_merge) | |
2382 | { | |
2383 | char *new_path = NULL; | |
2384 | struct dir_rename_entry *entry = check_dir_renamed(path, dir_renames); | |
2385 | struct dir_rename_entry *oentry = NULL; | |
2386 | ||
2387 | if (!entry) | |
2388 | return new_path; | |
2389 | ||
2390 | /* | |
2391 | * This next part is a little weird. We do not want to do an | |
2392 | * implicit rename into a directory we renamed on our side, because | |
2393 | * that will result in a spurious rename/rename(1to2) conflict. An | |
2394 | * example: | |
2395 | * Base commit: dumbdir/afile, otherdir/bfile | |
2396 | * Side 1: smrtdir/afile, otherdir/bfile | |
2397 | * Side 2: dumbdir/afile, dumbdir/bfile | |
2398 | * Here, while working on Side 1, we could notice that otherdir was | |
2399 | * renamed/merged to dumbdir, and change the diff_filepair for | |
2400 | * otherdir/bfile into a rename into dumbdir/bfile. However, Side | |
2401 | * 2 will notice the rename from dumbdir to smrtdir, and do the | |
2402 | * transitive rename to move it from dumbdir/bfile to | |
2403 | * smrtdir/bfile. That gives us bfile in dumbdir vs being in | |
2404 | * smrtdir, a rename/rename(1to2) conflict. We really just want | |
2405 | * the file to end up in smrtdir. And the way to achieve that is | |
2406 | * to not let Side1 do the rename to dumbdir, since we know that is | |
2407 | * the source of one of our directory renames. | |
2408 | * | |
2409 | * That's why oentry and dir_rename_exclusions is here. | |
2410 | * | |
2411 | * As it turns out, this also prevents N-way transient rename | |
2412 | * confusion; See testcases 9c and 9d of t6043. | |
2413 | */ | |
2414 | oentry = dir_rename_find_entry(dir_rename_exclusions, entry->new_dir.buf); | |
2415 | if (oentry) { | |
259ccb6c | 2416 | output(opt, 1, _("WARNING: Avoiding applying %s -> %s rename " |
f6f77559 EN |
2417 | "to %s, because %s itself was renamed."), |
2418 | entry->dir, entry->new_dir.buf, path, entry->new_dir.buf); | |
2419 | } else { | |
259ccb6c | 2420 | new_path = handle_path_level_conflicts(opt, path, entry, |
f6f77559 EN |
2421 | collisions, tree); |
2422 | *clean_merge &= (new_path != NULL); | |
2423 | } | |
2424 | ||
2425 | return new_path; | |
2426 | } | |
2427 | ||
259ccb6c | 2428 | static void apply_directory_rename_modifications(struct merge_options *opt, |
9c0743fe EN |
2429 | struct diff_filepair *pair, |
2430 | char *new_path, | |
2431 | struct rename *re, | |
2432 | struct tree *tree, | |
2433 | struct tree *o_tree, | |
2434 | struct tree *a_tree, | |
2435 | struct tree *b_tree, | |
b53c5028 | 2436 | struct string_list *entries) |
9c0743fe EN |
2437 | { |
2438 | struct string_list_item *item; | |
2439 | int stage = (tree == a_tree ? 2 : 3); | |
18797a3b | 2440 | int update_wd; |
9c0743fe EN |
2441 | |
2442 | /* | |
2443 | * In all cases where we can do directory rename detection, | |
2444 | * unpack_trees() will have read pair->two->path into the | |
2445 | * index and the working copy. We need to remove it so that | |
2446 | * we can instead place it at new_path. It is guaranteed to | |
2447 | * not be untracked (unpack_trees() would have errored out | |
2448 | * saying the file would have been overwritten), but it might | |
2449 | * be dirty, though. | |
2450 | */ | |
259ccb6c | 2451 | update_wd = !was_dirty(opt, pair->two->path); |
18797a3b | 2452 | if (!update_wd) |
259ccb6c | 2453 | output(opt, 1, _("Refusing to lose dirty file at %s"), |
18797a3b | 2454 | pair->two->path); |
259ccb6c | 2455 | remove_file(opt, 1, pair->two->path, !update_wd); |
9c0743fe EN |
2456 | |
2457 | /* Find or create a new re->dst_entry */ | |
2458 | item = string_list_lookup(entries, new_path); | |
2459 | if (item) { | |
2460 | /* | |
2461 | * Since we're renaming on this side of history, and it's | |
2462 | * due to a directory rename on the other side of history | |
2463 | * (which we only allow when the directory in question no | |
2464 | * longer exists on the other side of history), the | |
2465 | * original entry for re->dst_entry is no longer | |
2466 | * necessary... | |
2467 | */ | |
2468 | re->dst_entry->processed = 1; | |
2469 | ||
2470 | /* | |
2471 | * ...because we'll be using this new one. | |
2472 | */ | |
2473 | re->dst_entry = item->util; | |
2474 | } else { | |
2475 | /* | |
2476 | * re->dst_entry is for the before-dir-rename path, and we | |
2477 | * need it to hold information for the after-dir-rename | |
2478 | * path. Before creating a new entry, we need to mark the | |
2479 | * old one as unnecessary (...unless it is shared by | |
2480 | * src_entry, i.e. this didn't use to be a rename, in which | |
2481 | * case we can just allow the normal processing to happen | |
2482 | * for it). | |
2483 | */ | |
2484 | if (pair->status == 'R') | |
2485 | re->dst_entry->processed = 1; | |
2486 | ||
34e7771b | 2487 | re->dst_entry = insert_stage_data(opt->repo, new_path, |
9c0743fe EN |
2488 | o_tree, a_tree, b_tree, |
2489 | entries); | |
2490 | item = string_list_insert(entries, new_path); | |
2491 | item->util = re->dst_entry; | |
2492 | } | |
2493 | ||
2494 | /* | |
2495 | * Update the stage_data with the information about the path we are | |
2496 | * moving into place. That slot will be empty and available for us | |
2497 | * to write to because of the collision checks in | |
2498 | * handle_path_level_conflicts(). In other words, | |
2499 | * re->dst_entry->stages[stage].oid will be the null_oid, so it's | |
2500 | * open for us to write to. | |
2501 | * | |
2502 | * It may be tempting to actually update the index at this point as | |
2503 | * well, using update_stages_for_stage_data(), but as per the big | |
2504 | * "NOTE" in update_stages(), doing so will modify the current | |
2505 | * in-memory index which will break calls to would_lose_untracked() | |
2506 | * that we need to make. Instead, we need to just make sure that | |
8ebe7b05 | 2507 | * the various handle_rename_*() functions update the index |
9c0743fe EN |
2508 | * explicitly rather than relying on unpack_trees() to have done it. |
2509 | */ | |
50ddb089 NTND |
2510 | get_tree_entry(opt->repo, |
2511 | &tree->object.oid, | |
9c0743fe EN |
2512 | pair->two->path, |
2513 | &re->dst_entry->stages[stage].oid, | |
2514 | &re->dst_entry->stages[stage].mode); | |
2515 | ||
6d169fd3 EN |
2516 | /* |
2517 | * Record the original change status (or 'type' of change). If it | |
2518 | * was originally an add ('A'), this lets us differentiate later | |
2519 | * between a RENAME_DELETE conflict and RENAME_VIA_DIR (they | |
2520 | * otherwise look the same). If it was originally a rename ('R'), | |
2521 | * this lets us remember and report accurately about the transitive | |
2522 | * renaming that occurred via the directory rename detection. Also, | |
2523 | * record the original destination name. | |
2524 | */ | |
2525 | re->dir_rename_original_type = pair->status; | |
2526 | re->dir_rename_original_dest = pair->two->path; | |
2527 | ||
9c0743fe EN |
2528 | /* |
2529 | * We don't actually look at pair->status again, but it seems | |
2530 | * pedagogically correct to adjust it. | |
2531 | */ | |
2532 | pair->status = 'R'; | |
2533 | ||
2534 | /* | |
2535 | * Finally, record the new location. | |
2536 | */ | |
2537 | pair->two->path = new_path; | |
2538 | } | |
2539 | ||
e5257b2a EN |
2540 | /* |
2541 | * Get information of all renames which occurred in 'pairs', making use of | |
2542 | * any implicit directory renames inferred from the other side of history. | |
2543 | * We need the three trees in the merge ('o_tree', 'a_tree' and 'b_tree') | |
2544 | * to be able to associate the correct cache entries with the rename | |
2545 | * information; tree is always equal to either a_tree or b_tree. | |
2546 | */ | |
259ccb6c | 2547 | static struct string_list *get_renames(struct merge_options *opt, |
c336ab85 | 2548 | const char *branch, |
e5257b2a | 2549 | struct diff_queue_struct *pairs, |
e95ab70a | 2550 | struct hashmap *dir_renames, |
f6f77559 | 2551 | struct hashmap *dir_rename_exclusions, |
e5257b2a EN |
2552 | struct tree *tree, |
2553 | struct tree *o_tree, | |
2554 | struct tree *a_tree, | |
2555 | struct tree *b_tree, | |
f6f77559 EN |
2556 | struct string_list *entries, |
2557 | int *clean_merge) | |
e5257b2a EN |
2558 | { |
2559 | int i; | |
e95ab70a EN |
2560 | struct hashmap collisions; |
2561 | struct hashmap_iter iter; | |
2562 | struct collision_entry *e; | |
e5257b2a EN |
2563 | struct string_list *renames; |
2564 | ||
e95ab70a | 2565 | compute_collisions(&collisions, dir_renames, pairs); |
e5257b2a EN |
2566 | renames = xcalloc(1, sizeof(struct string_list)); |
2567 | ||
2568 | for (i = 0; i < pairs->nr; ++i) { | |
9ba91557 EN |
2569 | struct string_list_item *item; |
2570 | struct rename *re; | |
e5257b2a | 2571 | struct diff_filepair *pair = pairs->queue[i]; |
f6f77559 | 2572 | char *new_path; /* non-NULL only with directory renames */ |
9ba91557 | 2573 | |
6e7e027f | 2574 | if (pair->status != 'A' && pair->status != 'R') { |
9ba91557 EN |
2575 | diff_free_filepair(pair); |
2576 | continue; | |
2577 | } | |
259ccb6c | 2578 | new_path = check_for_directory_rename(opt, pair->two->path, tree, |
f6f77559 EN |
2579 | dir_renames, |
2580 | dir_rename_exclusions, | |
2581 | &collisions, | |
2582 | clean_merge); | |
2583 | if (pair->status != 'R' && !new_path) { | |
2584 | diff_free_filepair(pair); | |
2585 | continue; | |
2586 | } | |
2587 | ||
9ba91557 EN |
2588 | re = xmalloc(sizeof(*re)); |
2589 | re->processed = 0; | |
2590 | re->pair = pair; | |
c336ab85 | 2591 | re->branch = branch; |
6d169fd3 EN |
2592 | re->dir_rename_original_type = '\0'; |
2593 | re->dir_rename_original_dest = NULL; | |
9ba91557 EN |
2594 | item = string_list_lookup(entries, re->pair->one->path); |
2595 | if (!item) | |
34e7771b NTND |
2596 | re->src_entry = insert_stage_data(opt->repo, |
2597 | re->pair->one->path, | |
9ba91557 EN |
2598 | o_tree, a_tree, b_tree, entries); |
2599 | else | |
2600 | re->src_entry = item->util; | |
2601 | ||
2602 | item = string_list_lookup(entries, re->pair->two->path); | |
2603 | if (!item) | |
34e7771b NTND |
2604 | re->dst_entry = insert_stage_data(opt->repo, |
2605 | re->pair->two->path, | |
9ba91557 EN |
2606 | o_tree, a_tree, b_tree, entries); |
2607 | else | |
2608 | re->dst_entry = item->util; | |
2609 | item = string_list_insert(renames, pair->one->path); | |
2610 | item->util = re; | |
9c0743fe | 2611 | if (new_path) |
259ccb6c | 2612 | apply_directory_rename_modifications(opt, pair, new_path, |
9c0743fe EN |
2613 | re, tree, o_tree, |
2614 | a_tree, b_tree, | |
b53c5028 | 2615 | entries); |
9ba91557 | 2616 | } |
e95ab70a EN |
2617 | |
2618 | hashmap_iter_init(&collisions, &iter); | |
2619 | while ((e = hashmap_iter_next(&iter))) { | |
2620 | free(e->target_file); | |
2621 | string_list_clear(&e->source_files, 0); | |
2622 | } | |
2623 | hashmap_free(&collisions, 1); | |
9ba91557 EN |
2624 | return renames; |
2625 | } | |
2626 | ||
259ccb6c | 2627 | static int process_renames(struct merge_options *opt, |
8a2fce18 MV |
2628 | struct string_list *a_renames, |
2629 | struct string_list *b_renames) | |
9047ebbc MV |
2630 | { |
2631 | int clean_merge = 1, i, j; | |
183113a5 TF |
2632 | struct string_list a_by_dst = STRING_LIST_INIT_NODUP; |
2633 | struct string_list b_by_dst = STRING_LIST_INIT_NODUP; | |
9047ebbc MV |
2634 | const struct rename *sre; |
2635 | ||
2636 | for (i = 0; i < a_renames->nr; i++) { | |
2637 | sre = a_renames->items[i].util; | |
78a395d3 | 2638 | string_list_insert(&a_by_dst, sre->pair->two->path)->util |
0a6b8712 | 2639 | = (void *)sre; |
9047ebbc MV |
2640 | } |
2641 | for (i = 0; i < b_renames->nr; i++) { | |
2642 | sre = b_renames->items[i].util; | |
78a395d3 | 2643 | string_list_insert(&b_by_dst, sre->pair->two->path)->util |
0a6b8712 | 2644 | = (void *)sre; |
9047ebbc MV |
2645 | } |
2646 | ||
2647 | for (i = 0, j = 0; i < a_renames->nr || j < b_renames->nr;) { | |
8e24cbae | 2648 | struct string_list *renames1, *renames2Dst; |
9047ebbc | 2649 | struct rename *ren1 = NULL, *ren2 = NULL; |
9047ebbc | 2650 | const char *ren1_src, *ren1_dst; |
461f5041 | 2651 | struct string_list_item *lookup; |
9047ebbc MV |
2652 | |
2653 | if (i >= a_renames->nr) { | |
9047ebbc MV |
2654 | ren2 = b_renames->items[j++].util; |
2655 | } else if (j >= b_renames->nr) { | |
9047ebbc MV |
2656 | ren1 = a_renames->items[i++].util; |
2657 | } else { | |
8e24cbae BK |
2658 | int compare = strcmp(a_renames->items[i].string, |
2659 | b_renames->items[j].string); | |
9047ebbc MV |
2660 | if (compare <= 0) |
2661 | ren1 = a_renames->items[i++].util; | |
2662 | if (compare >= 0) | |
2663 | ren2 = b_renames->items[j++].util; | |
2664 | } | |
2665 | ||
2666 | /* TODO: refactor, so that 1/2 are not needed */ | |
2667 | if (ren1) { | |
2668 | renames1 = a_renames; | |
9047ebbc | 2669 | renames2Dst = &b_by_dst; |
9047ebbc | 2670 | } else { |
9047ebbc | 2671 | renames1 = b_renames; |
9047ebbc | 2672 | renames2Dst = &a_by_dst; |
35d803bc | 2673 | SWAP(ren2, ren1); |
9047ebbc | 2674 | } |
9047ebbc | 2675 | |
9047ebbc MV |
2676 | if (ren1->processed) |
2677 | continue; | |
2678 | ren1->processed = 1; | |
9047ebbc | 2679 | ren1->dst_entry->processed = 1; |
7769a75e EN |
2680 | /* BUG: We should only mark src_entry as processed if we |
2681 | * are not dealing with a rename + add-source case. | |
2682 | */ | |
9047ebbc | 2683 | ren1->src_entry->processed = 1; |
9047ebbc MV |
2684 | |
2685 | ren1_src = ren1->pair->one->path; | |
2686 | ren1_dst = ren1->pair->two->path; | |
2687 | ||
2688 | if (ren2) { | |
461f5041 | 2689 | /* One file renamed on both sides */ |
9047ebbc MV |
2690 | const char *ren2_src = ren2->pair->one->path; |
2691 | const char *ren2_dst = ren2->pair->two->path; | |
4f66dade | 2692 | enum rename_type rename_type; |
9047ebbc | 2693 | if (strcmp(ren1_src, ren2_src) != 0) |
033abf97 | 2694 | BUG("ren1_src != ren2_src"); |
9047ebbc MV |
2695 | ren2->dst_entry->processed = 1; |
2696 | ren2->processed = 1; | |
2697 | if (strcmp(ren1_dst, ren2_dst) != 0) { | |
4f66dade | 2698 | rename_type = RENAME_ONE_FILE_TO_TWO; |
461f5041 | 2699 | clean_merge = 0; |
9047ebbc | 2700 | } else { |
4f66dade | 2701 | rename_type = RENAME_ONE_FILE_TO_ONE; |
7769a75e EN |
2702 | /* BUG: We should only remove ren1_src in |
2703 | * the base stage (think of rename + | |
2704 | * add-source cases). | |
2705 | */ | |
259ccb6c | 2706 | remove_file(opt, 1, ren1_src, 1); |
b8ddf164 EN |
2707 | update_entry(ren1->dst_entry, |
2708 | ren1->pair->one, | |
2709 | ren1->pair->two, | |
2710 | ren2->pair->two); | |
9047ebbc | 2711 | } |
c336ab85 | 2712 | setup_rename_conflict_info(rename_type, opt, ren1, ren2); |
461f5041 EN |
2713 | } else if ((lookup = string_list_lookup(renames2Dst, ren1_dst))) { |
2714 | /* Two different files renamed to the same thing */ | |
2715 | char *ren2_dst; | |
2716 | ren2 = lookup->util; | |
2717 | ren2_dst = ren2->pair->two->path; | |
2718 | if (strcmp(ren1_dst, ren2_dst) != 0) | |
033abf97 | 2719 | BUG("ren1_dst != ren2_dst"); |
461f5041 EN |
2720 | |
2721 | clean_merge = 0; | |
2722 | ren2->processed = 1; | |
2723 | /* | |
2724 | * BUG: We should only mark src_entry as processed | |
2725 | * if we are not dealing with a rename + add-source | |
2726 | * case. | |
2727 | */ | |
2728 | ren2->src_entry->processed = 1; | |
2729 | ||
2730 | setup_rename_conflict_info(RENAME_TWO_FILES_TO_ONE, | |
c336ab85 | 2731 | opt, ren1, ren2); |
9047ebbc MV |
2732 | } else { |
2733 | /* Renamed in 1, maybe changed in 2 */ | |
9047ebbc MV |
2734 | /* we only use sha1 and mode of these */ |
2735 | struct diff_filespec src_other, dst_other; | |
41d70bd6 | 2736 | int try_merge; |
9047ebbc | 2737 | |
41d70bd6 EN |
2738 | /* |
2739 | * unpack_trees loads entries from common-commit | |
2740 | * into stage 1, from head-commit into stage 2, and | |
2741 | * from merge-commit into stage 3. We keep track | |
2742 | * of which side corresponds to the rename. | |
2743 | */ | |
2744 | int renamed_stage = a_renames == renames1 ? 2 : 3; | |
2745 | int other_stage = a_renames == renames1 ? 3 : 2; | |
9047ebbc | 2746 | |
7769a75e EN |
2747 | /* BUG: We should only remove ren1_src in the base |
2748 | * stage and in other_stage (think of rename + | |
2749 | * add-source case). | |
2750 | */ | |
259ccb6c EN |
2751 | remove_file(opt, 1, ren1_src, |
2752 | renamed_stage == 2 || !was_tracked(opt, ren1_src)); | |
9047ebbc | 2753 | |
fd429e98 | 2754 | oidcpy(&src_other.oid, |
2755 | &ren1->src_entry->stages[other_stage].oid); | |
41d70bd6 | 2756 | src_other.mode = ren1->src_entry->stages[other_stage].mode; |
fd429e98 | 2757 | oidcpy(&dst_other.oid, |
2758 | &ren1->dst_entry->stages[other_stage].oid); | |
41d70bd6 | 2759 | dst_other.mode = ren1->dst_entry->stages[other_stage].mode; |
9047ebbc MV |
2760 | try_merge = 0; |
2761 | ||
9c0743fe | 2762 | if (oid_eq(&src_other.oid, &null_oid) && |
6d169fd3 | 2763 | ren1->dir_rename_original_type == 'A') { |
5455c338 | 2764 | setup_rename_conflict_info(RENAME_VIA_DIR, |
c336ab85 | 2765 | opt, ren1, NULL); |
9c0743fe | 2766 | } else if (oid_eq(&src_other.oid, &null_oid)) { |
4f66dade | 2767 | setup_rename_conflict_info(RENAME_DELETE, |
c336ab85 | 2768 | opt, ren1, NULL); |
d5af5105 | 2769 | } else if ((dst_other.mode == ren1->pair->two->mode) && |
b4da9d62 | 2770 | oid_eq(&dst_other.oid, &ren1->pair->two->oid)) { |
35a74abf EN |
2771 | /* |
2772 | * Added file on the other side identical to | |
2773 | * the file being renamed: clean merge. | |
2774 | * Also, there is no need to overwrite the | |
2775 | * file already in the working copy, so call | |
2776 | * update_file_flags() instead of | |
2777 | * update_file(). | |
2778 | */ | |
259ccb6c | 2779 | if (update_file_flags(opt, |
8daec1df | 2780 | ren1->pair->two, |
75456f96 JS |
2781 | ren1_dst, |
2782 | 1, /* update_cache */ | |
2783 | 0 /* update_wd */)) | |
2784 | clean_merge = -1; | |
b4da9d62 | 2785 | } else if (!oid_eq(&dst_other.oid, &null_oid)) { |
7f867165 EN |
2786 | /* |
2787 | * Probably not a clean merge, but it's | |
2788 | * premature to set clean_merge to 0 here, | |
2789 | * because if the rename merges cleanly and | |
2790 | * the merge exactly matches the newly added | |
2791 | * file, then the merge will be clean. | |
2792 | */ | |
2793 | setup_rename_conflict_info(RENAME_ADD, | |
c336ab85 | 2794 | opt, ren1, NULL); |
9047ebbc MV |
2795 | } else |
2796 | try_merge = 1; | |
2797 | ||
75456f96 JS |
2798 | if (clean_merge < 0) |
2799 | goto cleanup_and_return; | |
9047ebbc | 2800 | if (try_merge) { |
e3de888c | 2801 | struct diff_filespec *o, *a, *b; |
9047ebbc MV |
2802 | src_other.path = (char *)ren1_src; |
2803 | ||
e3de888c | 2804 | o = ren1->pair->one; |
9047ebbc MV |
2805 | if (a_renames == renames1) { |
2806 | a = ren1->pair->two; | |
2807 | b = &src_other; | |
2808 | } else { | |
2809 | b = ren1->pair->two; | |
2810 | a = &src_other; | |
2811 | } | |
e3de888c | 2812 | update_entry(ren1->dst_entry, o, a, b); |
4f66dade | 2813 | setup_rename_conflict_info(RENAME_NORMAL, |
c336ab85 | 2814 | opt, ren1, NULL); |
9047ebbc MV |
2815 | } |
2816 | } | |
2817 | } | |
75456f96 | 2818 | cleanup_and_return: |
9047ebbc MV |
2819 | string_list_clear(&a_by_dst, 0); |
2820 | string_list_clear(&b_by_dst, 0); | |
2821 | ||
2822 | return clean_merge; | |
2823 | } | |
2824 | ||
f172589e EN |
2825 | struct rename_info { |
2826 | struct string_list *head_renames; | |
2827 | struct string_list *merge_renames; | |
2828 | }; | |
2829 | ||
7fe40b88 EN |
2830 | static void initial_cleanup_rename(struct diff_queue_struct *pairs, |
2831 | struct hashmap *dir_renames) | |
ffc16c49 | 2832 | { |
7fe40b88 EN |
2833 | struct hashmap_iter iter; |
2834 | struct dir_rename_entry *e; | |
2835 | ||
2836 | hashmap_iter_init(dir_renames, &iter); | |
2837 | while ((e = hashmap_iter_next(&iter))) { | |
2838 | free(e->dir); | |
2839 | strbuf_release(&e->new_dir); | |
2840 | /* possible_new_dirs already cleared in get_directory_renames */ | |
2841 | } | |
2842 | hashmap_free(dir_renames, 1); | |
2843 | free(dir_renames); | |
2844 | ||
ffc16c49 EN |
2845 | free(pairs->queue); |
2846 | free(pairs); | |
2847 | } | |
2848 | ||
259ccb6c | 2849 | static int detect_and_process_renames(struct merge_options *opt, |
8ebe7b05 EN |
2850 | struct tree *common, |
2851 | struct tree *head, | |
2852 | struct tree *merge, | |
2853 | struct string_list *entries, | |
2854 | struct rename_info *ri) | |
f172589e | 2855 | { |
e5257b2a | 2856 | struct diff_queue_struct *head_pairs, *merge_pairs; |
7fe40b88 | 2857 | struct hashmap *dir_re_head, *dir_re_merge; |
f6f77559 | 2858 | int clean = 1; |
e5257b2a | 2859 | |
3992ff0c EN |
2860 | ri->head_renames = NULL; |
2861 | ri->merge_renames = NULL; | |
2862 | ||
259ccb6c | 2863 | if (!merge_detect_rename(opt)) |
3992ff0c EN |
2864 | return 1; |
2865 | ||
259ccb6c EN |
2866 | head_pairs = get_diffpairs(opt, common, head); |
2867 | merge_pairs = get_diffpairs(opt, common, merge); | |
e5257b2a | 2868 | |
8e012516 DS |
2869 | if ((opt->detect_directory_renames == MERGE_DIRECTORY_RENAMES_TRUE) || |
2870 | (opt->detect_directory_renames == MERGE_DIRECTORY_RENAMES_CONFLICT && | |
2871 | !opt->call_depth)) { | |
b53c5028 JK |
2872 | dir_re_head = get_directory_renames(head_pairs); |
2873 | dir_re_merge = get_directory_renames(merge_pairs); | |
7fe40b88 | 2874 | |
259ccb6c | 2875 | handle_directory_level_conflicts(opt, |
5fdddd9b EN |
2876 | dir_re_head, head, |
2877 | dir_re_merge, merge); | |
2878 | } else { | |
2879 | dir_re_head = xmalloc(sizeof(*dir_re_head)); | |
2880 | dir_re_merge = xmalloc(sizeof(*dir_re_merge)); | |
2881 | dir_rename_init(dir_re_head); | |
2882 | dir_rename_init(dir_re_merge); | |
2883 | } | |
96e7ffbd | 2884 | |
c336ab85 | 2885 | ri->head_renames = get_renames(opt, opt->branch1, head_pairs, |
f6f77559 EN |
2886 | dir_re_merge, dir_re_head, head, |
2887 | common, head, merge, entries, | |
2888 | &clean); | |
2889 | if (clean < 0) | |
2890 | goto cleanup; | |
c336ab85 | 2891 | ri->merge_renames = get_renames(opt, opt->branch2, merge_pairs, |
f6f77559 EN |
2892 | dir_re_head, dir_re_merge, merge, |
2893 | common, head, merge, entries, | |
2894 | &clean); | |
2895 | if (clean < 0) | |
2896 | goto cleanup; | |
259ccb6c | 2897 | clean &= process_renames(opt, ri->head_renames, ri->merge_renames); |
f6f77559 EN |
2898 | |
2899 | cleanup: | |
e5257b2a EN |
2900 | /* |
2901 | * Some cleanup is deferred until cleanup_renames() because the | |
2902 | * data structures are still needed and referenced in | |
2903 | * process_entry(). But there are a few things we can free now. | |
2904 | */ | |
7fe40b88 EN |
2905 | initial_cleanup_rename(head_pairs, dir_re_head); |
2906 | initial_cleanup_rename(merge_pairs, dir_re_merge); | |
e5257b2a EN |
2907 | |
2908 | return clean; | |
f172589e EN |
2909 | } |
2910 | ||
ffc16c49 | 2911 | static void final_cleanup_rename(struct string_list *rename) |
f172589e | 2912 | { |
9cfee25a EN |
2913 | const struct rename *re; |
2914 | int i; | |
f172589e | 2915 | |
3992ff0c EN |
2916 | if (rename == NULL) |
2917 | return; | |
2918 | ||
9cfee25a EN |
2919 | for (i = 0; i < rename->nr; i++) { |
2920 | re = rename->items[i].util; | |
2921 | diff_free_filepair(re->pair); | |
2922 | } | |
2923 | string_list_clear(rename, 1); | |
2924 | free(rename); | |
2925 | } | |
2926 | ||
ffc16c49 | 2927 | static void final_cleanup_renames(struct rename_info *re_info) |
9cfee25a | 2928 | { |
ffc16c49 EN |
2929 | final_cleanup_rename(re_info->head_renames); |
2930 | final_cleanup_rename(re_info->merge_renames); | |
f172589e EN |
2931 | } |
2932 | ||
259ccb6c | 2933 | static int read_oid_strbuf(struct merge_options *opt, |
d90e759f EN |
2934 | const struct object_id *oid, |
2935 | struct strbuf *dst) | |
331a1838 EB |
2936 | { |
2937 | void *buf; | |
2938 | enum object_type type; | |
2939 | unsigned long size; | |
b4f5aca4 | 2940 | buf = read_object_file(oid, &type, &size); |
331a1838 | 2941 | if (!buf) |
259ccb6c | 2942 | return err(opt, _("cannot read object %s"), oid_to_hex(oid)); |
331a1838 EB |
2943 | if (type != OBJ_BLOB) { |
2944 | free(buf); | |
259ccb6c | 2945 | return err(opt, _("object %s is not a blob"), oid_to_hex(oid)); |
331a1838 EB |
2946 | } |
2947 | strbuf_attach(dst, buf, size, size + 1); | |
2948 | return 0; | |
2949 | } | |
2950 | ||
bc9204d4 | 2951 | static int blob_unchanged(struct merge_options *opt, |
8daec1df EN |
2952 | const struct diff_filespec *o, |
2953 | const struct diff_filespec *a, | |
3e7589b7 | 2954 | int renormalize, const char *path) |
331a1838 | 2955 | { |
93a02c55 EN |
2956 | struct strbuf obuf = STRBUF_INIT; |
2957 | struct strbuf abuf = STRBUF_INIT; | |
331a1838 | 2958 | int ret = 0; /* assume changed for safety */ |
93a02c55 | 2959 | const struct index_state *idx = opt->repo->index; |
331a1838 | 2960 | |
8daec1df | 2961 | if (a->mode != o->mode) |
72fac66b | 2962 | return 0; |
8daec1df | 2963 | if (oid_eq(&o->oid, &a->oid)) |
331a1838 | 2964 | return 1; |
3e7589b7 | 2965 | if (!renormalize) |
331a1838 EB |
2966 | return 0; |
2967 | ||
8daec1df EN |
2968 | if (read_oid_strbuf(opt, &o->oid, &obuf) || |
2969 | read_oid_strbuf(opt, &a->oid, &abuf)) | |
331a1838 EB |
2970 | goto error_return; |
2971 | /* | |
2972 | * Note: binary | is used so that both renormalizations are | |
2973 | * performed. Comparison can be skipped if both files are | |
2974 | * unchanged since their sha1s have already been compared. | |
2975 | */ | |
93a02c55 EN |
2976 | if (renormalize_buffer(idx, path, obuf.buf, obuf.len, &obuf) | |
2977 | renormalize_buffer(idx, path, abuf.buf, abuf.len, &abuf)) | |
2978 | ret = (obuf.len == abuf.len && !memcmp(obuf.buf, abuf.buf, obuf.len)); | |
331a1838 EB |
2979 | |
2980 | error_return: | |
93a02c55 EN |
2981 | strbuf_release(&obuf); |
2982 | strbuf_release(&abuf); | |
331a1838 EB |
2983 | return ret; |
2984 | } | |
2985 | ||
259ccb6c | 2986 | static int handle_modify_delete(struct merge_options *opt, |
d90e759f | 2987 | const char *path, |
8daec1df EN |
2988 | const struct diff_filespec *o, |
2989 | const struct diff_filespec *a, | |
2990 | const struct diff_filespec *b) | |
5e3ce663 | 2991 | { |
b26d87f2 | 2992 | const char *modify_branch, *delete_branch; |
8daec1df | 2993 | const struct diff_filespec *changed; |
b26d87f2 | 2994 | |
8daec1df | 2995 | if (is_valid(a)) { |
259ccb6c EN |
2996 | modify_branch = opt->branch1; |
2997 | delete_branch = opt->branch2; | |
8daec1df | 2998 | changed = a; |
b26d87f2 | 2999 | } else { |
259ccb6c EN |
3000 | modify_branch = opt->branch2; |
3001 | delete_branch = opt->branch1; | |
8daec1df | 3002 | changed = b; |
b26d87f2 MM |
3003 | } |
3004 | ||
259ccb6c | 3005 | return handle_change_delete(opt, |
b26d87f2 | 3006 | path, NULL, |
8daec1df | 3007 | o, changed, |
b26d87f2 | 3008 | modify_branch, delete_branch, |
75456f96 | 3009 | _("modify"), _("modified")); |
5e3ce663 EN |
3010 | } |
3011 | ||
e62d1123 EN |
3012 | static int handle_content_merge(struct merge_file_info *mfi, |
3013 | struct merge_options *opt, | |
d9573556 EN |
3014 | const char *path, |
3015 | int is_dirty, | |
8daec1df EN |
3016 | const struct diff_filespec *o, |
3017 | const struct diff_filespec *a, | |
3018 | const struct diff_filespec *b, | |
043622b2 | 3019 | struct rename_conflict_info *ci) |
0c4918d1 | 3020 | { |
55653a68 | 3021 | const char *reason = _("content"); |
4ab9a157 | 3022 | unsigned df_conflict_remains = 0; |
0c4918d1 | 3023 | |
8daec1df | 3024 | if (!is_valid(o)) |
55653a68 | 3025 | reason = _("add/add"); |
8daec1df EN |
3026 | |
3027 | assert(o->path && a->path && b->path); | |
3028 | if (ci && dir_in_way(opt->repo->index, path, !opt->call_depth, | |
3029 | S_ISGITLINK(ci->ren1->pair->two->mode))) | |
3030 | df_conflict_remains = 1; | |
3031 | ||
3032 | if (merge_mode_and_contents(opt, o, a, b, path, | |
259ccb6c | 3033 | opt->branch1, opt->branch2, |
e62d1123 | 3034 | opt->call_depth * 2, mfi)) |
3c8a51e8 | 3035 | return -1; |
4ab9a157 | 3036 | |
1de70dbd EN |
3037 | /* |
3038 | * We can skip updating the working tree file iff: | |
3039 | * a) The merge is clean | |
3040 | * b) The merge matches what was in HEAD (content, mode, pathname) | |
3041 | * c) The target path is usable (i.e. not involved in D/F conflict) | |
3042 | */ | |
e62d1123 | 3043 | if (mfi->clean && was_tracked_and_matches(opt, path, &mfi->blob) && |
1de70dbd | 3044 | !df_conflict_remains) { |
2b75fb60 EN |
3045 | int pos; |
3046 | struct cache_entry *ce; | |
3047 | ||
259ccb6c | 3048 | output(opt, 3, _("Skipped %s (merged same as existing)"), path); |
e62d1123 | 3049 | if (add_cacheinfo(opt, &mfi->blob, path, |
259ccb6c | 3050 | 0, (!opt->call_depth && !is_dirty), 0)) |
1de70dbd | 3051 | return -1; |
2b75fb60 EN |
3052 | /* |
3053 | * However, add_cacheinfo() will delete the old cache entry | |
3054 | * and add a new one. We need to copy over any skip_worktree | |
3055 | * flag to avoid making the file appear as if it were | |
3056 | * deleted by the user. | |
3057 | */ | |
259ccb6c EN |
3058 | pos = index_name_pos(&opt->orig_index, path, strlen(path)); |
3059 | ce = opt->orig_index.cache[pos]; | |
2b75fb60 | 3060 | if (ce_skip_worktree(ce)) { |
259ccb6c EN |
3061 | pos = index_name_pos(opt->repo->index, path, strlen(path)); |
3062 | ce = opt->repo->index->cache[pos]; | |
2b75fb60 EN |
3063 | ce->ce_flags |= CE_SKIP_WORKTREE; |
3064 | } | |
e62d1123 | 3065 | return mfi->clean; |
05cf21eb | 3066 | } |
0c4918d1 | 3067 | |
e62d1123 EN |
3068 | if (!mfi->clean) { |
3069 | if (S_ISGITLINK(mfi->blob.mode)) | |
55653a68 | 3070 | reason = _("submodule"); |
259ccb6c | 3071 | output(opt, 1, _("CONFLICT (%s): Merge conflict in %s"), |
0c4918d1 | 3072 | reason, path); |
043622b2 | 3073 | if (ci && !df_conflict_remains) |
8daec1df | 3074 | if (update_stages(opt, path, o, a, b)) |
75456f96 | 3075 | return -1; |
0c4918d1 EN |
3076 | } |
3077 | ||
bd42380e | 3078 | if (df_conflict_remains || is_dirty) { |
3d6b8e88 | 3079 | char *new_path; |
259ccb6c EN |
3080 | if (opt->call_depth) { |
3081 | remove_file_from_index(opt->repo->index, path); | |
51931bf0 | 3082 | } else { |
e62d1123 | 3083 | if (!mfi->clean) { |
8daec1df | 3084 | if (update_stages(opt, path, o, a, b)) |
75456f96 JS |
3085 | return -1; |
3086 | } else { | |
259ccb6c | 3087 | int file_from_stage2 = was_tracked(opt, path); |
51931bf0 | 3088 | |
259ccb6c | 3089 | if (update_stages(opt, path, NULL, |
e62d1123 EN |
3090 | file_from_stage2 ? &mfi->blob : NULL, |
3091 | file_from_stage2 ? NULL : &mfi->blob)) | |
75456f96 | 3092 | return -1; |
51931bf0 EN |
3093 | } |
3094 | ||
3095 | } | |
c336ab85 | 3096 | new_path = unique_path(opt, path, ci->ren1->branch); |
bd42380e | 3097 | if (is_dirty) { |
259ccb6c | 3098 | output(opt, 1, _("Refusing to lose dirty file at %s"), |
bd42380e EN |
3099 | path); |
3100 | } | |
259ccb6c | 3101 | output(opt, 1, _("Adding as %s instead"), new_path); |
e62d1123 | 3102 | if (update_file(opt, 0, &mfi->blob, new_path)) { |
75456f96 JS |
3103 | free(new_path); |
3104 | return -1; | |
3105 | } | |
3d6b8e88 | 3106 | free(new_path); |
e62d1123 EN |
3107 | mfi->clean = 0; |
3108 | } else if (update_file(opt, mfi->clean, &mfi->blob, path)) | |
75456f96 | 3109 | return -1; |
e62d1123 | 3110 | return !is_dirty && mfi->clean; |
0c4918d1 EN |
3111 | } |
3112 | ||
259ccb6c | 3113 | static int handle_rename_normal(struct merge_options *opt, |
8ebe7b05 | 3114 | const char *path, |
8daec1df EN |
3115 | const struct diff_filespec *o, |
3116 | const struct diff_filespec *a, | |
3117 | const struct diff_filespec *b, | |
8ebe7b05 | 3118 | struct rename_conflict_info *ci) |
64b1abe9 | 3119 | { |
8c8e5bd6 | 3120 | struct rename *ren = ci->ren1; |
e62d1123 | 3121 | struct merge_file_info mfi; |
8c8e5bd6 EN |
3122 | int clean; |
3123 | int side = (ren->branch == opt->branch1 ? 2 : 3); | |
3124 | ||
64b1abe9 | 3125 | /* Merge the content and write it out */ |
8c8e5bd6 EN |
3126 | clean = handle_content_merge(&mfi, opt, path, was_dirty(opt, path), |
3127 | o, a, b, ci); | |
3128 | ||
8e012516 DS |
3129 | if (clean && |
3130 | opt->detect_directory_renames == MERGE_DIRECTORY_RENAMES_CONFLICT && | |
8c8e5bd6 EN |
3131 | ren->dir_rename_original_dest) { |
3132 | if (update_stages(opt, path, | |
3133 | NULL, | |
3134 | side == 2 ? &mfi.blob : NULL, | |
3135 | side == 2 ? NULL : &mfi.blob)) | |
3136 | return -1; | |
3137 | clean = 0; /* not clean, but conflicted */ | |
3138 | } | |
3139 | return clean; | |
3140 | } | |
3141 | ||
3142 | static void dir_rename_warning(const char *msg, | |
3143 | int is_add, | |
3144 | int clean, | |
3145 | struct merge_options *opt, | |
3146 | struct rename *ren) | |
3147 | { | |
3148 | const char *other_branch; | |
3149 | other_branch = (ren->branch == opt->branch1 ? | |
3150 | opt->branch2 : opt->branch1); | |
3151 | if (is_add) { | |
3152 | output(opt, clean ? 2 : 1, msg, | |
3153 | ren->pair->one->path, ren->branch, | |
3154 | other_branch, ren->pair->two->path); | |
3155 | return; | |
3156 | } | |
3157 | output(opt, clean ? 2 : 1, msg, | |
3158 | ren->pair->one->path, ren->dir_rename_original_dest, ren->branch, | |
3159 | other_branch, ren->pair->two->path); | |
3160 | } | |
3161 | static int warn_about_dir_renamed_entries(struct merge_options *opt, | |
3162 | struct rename *ren) | |
3163 | { | |
3164 | const char *msg; | |
3165 | int clean = 1, is_add; | |
3166 | ||
3167 | if (!ren) | |
3168 | return clean; | |
3169 | ||
3170 | /* Return early if ren was not affected/created by a directory rename */ | |
3171 | if (!ren->dir_rename_original_dest) | |
3172 | return clean; | |
3173 | ||
3174 | /* Sanity checks */ | |
8e012516 | 3175 | assert(opt->detect_directory_renames > MERGE_DIRECTORY_RENAMES_NONE); |
8c8e5bd6 EN |
3176 | assert(ren->dir_rename_original_type == 'A' || |
3177 | ren->dir_rename_original_type == 'R'); | |
3178 | ||
3179 | /* Check whether to treat directory renames as a conflict */ | |
8e012516 | 3180 | clean = (opt->detect_directory_renames == MERGE_DIRECTORY_RENAMES_TRUE); |
8c8e5bd6 EN |
3181 | |
3182 | is_add = (ren->dir_rename_original_type == 'A'); | |
3183 | if (ren->dir_rename_original_type == 'A' && clean) { | |
3184 | msg = _("Path updated: %s added in %s inside a " | |
3185 | "directory that was renamed in %s; moving it to %s."); | |
3186 | } else if (ren->dir_rename_original_type == 'A' && !clean) { | |
3187 | msg = _("CONFLICT (file location): %s added in %s " | |
3188 | "inside a directory that was renamed in %s, " | |
3189 | "suggesting it should perhaps be moved to %s."); | |
3190 | } else if (ren->dir_rename_original_type == 'R' && clean) { | |
3191 | msg = _("Path updated: %s renamed to %s in %s, inside a " | |
3192 | "directory that was renamed in %s; moving it to %s."); | |
3193 | } else if (ren->dir_rename_original_type == 'R' && !clean) { | |
3194 | msg = _("CONFLICT (file location): %s renamed to %s in %s, " | |
3195 | "inside a directory that was renamed in %s, " | |
3196 | "suggesting it should perhaps be moved to %s."); | |
3197 | } else { | |
3198 | BUG("Impossible dir_rename_original_type/clean combination"); | |
3199 | } | |
3200 | dir_rename_warning(msg, is_add, clean, opt, ren); | |
3201 | ||
3202 | return clean; | |
0c4918d1 EN |
3203 | } |
3204 | ||
9047ebbc | 3205 | /* Per entry merge function */ |
259ccb6c | 3206 | static int process_entry(struct merge_options *opt, |
8a2fce18 | 3207 | const char *path, struct stage_data *entry) |
9047ebbc | 3208 | { |
9047ebbc | 3209 | int clean_merge = 1; |
259ccb6c | 3210 | int normalize = opt->renormalize; |
8daec1df EN |
3211 | |
3212 | struct diff_filespec *o = &entry->stages[1]; | |
3213 | struct diff_filespec *a = &entry->stages[2]; | |
3214 | struct diff_filespec *b = &entry->stages[3]; | |
3215 | int o_valid = is_valid(o); | |
3216 | int a_valid = is_valid(a); | |
3217 | int b_valid = is_valid(b); | |
3218 | o->path = a->path = b->path = (char*)path; | |
9047ebbc | 3219 | |
37348937 | 3220 | entry->processed = 1; |
4f66dade | 3221 | if (entry->rename_conflict_info) { |
043622b2 | 3222 | struct rename_conflict_info *ci = entry->rename_conflict_info; |
8daec1df | 3223 | struct diff_filespec *temp; |
8c8e5bd6 EN |
3224 | int path_clean; |
3225 | ||
3226 | path_clean = warn_about_dir_renamed_entries(opt, ci->ren1); | |
3227 | path_clean &= warn_about_dir_renamed_entries(opt, ci->ren2); | |
8daec1df EN |
3228 | |
3229 | /* | |
3230 | * For cases with a single rename, {o,a,b}->path have all been | |
3231 | * set to the rename target path; we need to set two of these | |
3232 | * back to the rename source. | |
3233 | * For rename/rename conflicts, we'll manually fix paths below. | |
3234 | */ | |
3235 | temp = (opt->branch1 == ci->ren1->branch) ? b : a; | |
3236 | o->path = temp->path = ci->ren1->pair->one->path; | |
3237 | if (ci->ren2) { | |
3238 | assert(opt->branch1 == ci->ren1->branch); | |
3239 | } | |
3240 | ||
043622b2 | 3241 | switch (ci->rename_type) { |
882fd11a | 3242 | case RENAME_NORMAL: |
4f66dade | 3243 | case RENAME_ONE_FILE_TO_ONE: |
8daec1df | 3244 | clean_merge = handle_rename_normal(opt, path, o, a, b, |
043622b2 | 3245 | ci); |
882fd11a | 3246 | break; |
5455c338 | 3247 | case RENAME_VIA_DIR: |
8c8e5bd6 | 3248 | clean_merge = handle_rename_via_dir(opt, ci); |
882fd11a | 3249 | break; |
7f867165 EN |
3250 | case RENAME_ADD: |
3251 | /* | |
3252 | * Probably unclean merge, but if the renamed file | |
3253 | * merges cleanly and the result can then be | |
3254 | * two-way merged cleanly with the added file, I | |
3255 | * guess it's a clean merge? | |
3256 | */ | |
043622b2 | 3257 | clean_merge = handle_rename_add(opt, ci); |
7f867165 | 3258 | break; |
3b130adf EN |
3259 | case RENAME_DELETE: |
3260 | clean_merge = 0; | |
e2d563df | 3261 | if (handle_rename_delete(opt, ci)) |
75456f96 | 3262 | clean_merge = -1; |
3b130adf | 3263 | break; |
07413c5a | 3264 | case RENAME_ONE_FILE_TO_TWO: |
8daec1df EN |
3265 | /* |
3266 | * Manually fix up paths; note: | |
3267 | * ren[12]->pair->one->path are equal. | |
3268 | */ | |
3269 | o->path = ci->ren1->pair->one->path; | |
3270 | a->path = ci->ren1->pair->two->path; | |
3271 | b->path = ci->ren2->pair->two->path; | |
3272 | ||
07413c5a | 3273 | clean_merge = 0; |
043622b2 | 3274 | if (handle_rename_rename_1to2(opt, ci)) |
75456f96 | 3275 | clean_merge = -1; |
07413c5a | 3276 | break; |
461f5041 | 3277 | case RENAME_TWO_FILES_TO_ONE: |
8daec1df EN |
3278 | /* |
3279 | * Manually fix up paths; note, | |
3280 | * ren[12]->pair->two->path are actually equal. | |
3281 | */ | |
3282 | o->path = NULL; | |
3283 | a->path = ci->ren1->pair->two->path; | |
3284 | b->path = ci->ren2->pair->two->path; | |
3285 | ||
bbafc9c4 EN |
3286 | /* |
3287 | * Probably unclean merge, but if the two renamed | |
3288 | * files merge cleanly and the two resulting files | |
3289 | * can then be two-way merged cleanly, I guess it's | |
3290 | * a clean merge? | |
3291 | */ | |
043622b2 | 3292 | clean_merge = handle_rename_rename_2to1(opt, ci); |
07413c5a EN |
3293 | break; |
3294 | default: | |
3295 | entry->processed = 0; | |
3296 | break; | |
3297 | } | |
8c8e5bd6 EN |
3298 | if (path_clean < clean_merge) |
3299 | clean_merge = path_clean; | |
8daec1df | 3300 | } else if (o_valid && (!a_valid || !b_valid)) { |
edd2faf5 | 3301 | /* Case A: Deleted in one */ |
8daec1df EN |
3302 | if ((!a_valid && !b_valid) || |
3303 | (!b_valid && blob_unchanged(opt, o, a, normalize, path)) || | |
3304 | (!a_valid && blob_unchanged(opt, o, b, normalize, path))) { | |
edd2faf5 EN |
3305 | /* Deleted in both or deleted in one and |
3306 | * unchanged in the other */ | |
8daec1df | 3307 | if (a_valid) |
259ccb6c | 3308 | output(opt, 2, _("Removing %s"), path); |
edd2faf5 | 3309 | /* do not touch working file if it did not exist */ |
8daec1df | 3310 | remove_file(opt, 1, path, !a_valid); |
edd2faf5 EN |
3311 | } else { |
3312 | /* Modify/delete; deleted side may have put a directory in the way */ | |
edd2faf5 | 3313 | clean_merge = 0; |
8daec1df | 3314 | if (handle_modify_delete(opt, path, o, a, b)) |
75456f96 | 3315 | clean_merge = -1; |
3d6b8e88 | 3316 | } |
8daec1df EN |
3317 | } else if ((!o_valid && a_valid && !b_valid) || |
3318 | (!o_valid && !a_valid && b_valid)) { | |
edd2faf5 EN |
3319 | /* Case B: Added in one. */ |
3320 | /* [nothing|directory] -> ([nothing|directory], file) */ | |
3321 | ||
9c0bbb50 EN |
3322 | const char *add_branch; |
3323 | const char *other_branch; | |
9c0bbb50 | 3324 | const char *conf; |
8daec1df | 3325 | const struct diff_filespec *contents; |
37348937 | 3326 | |
8daec1df | 3327 | if (a_valid) { |
259ccb6c EN |
3328 | add_branch = opt->branch1; |
3329 | other_branch = opt->branch2; | |
8daec1df | 3330 | contents = a; |
55653a68 | 3331 | conf = _("file/directory"); |
9c0bbb50 | 3332 | } else { |
259ccb6c EN |
3333 | add_branch = opt->branch2; |
3334 | other_branch = opt->branch1; | |
8daec1df | 3335 | contents = b; |
55653a68 | 3336 | conf = _("directory/file"); |
9c0bbb50 | 3337 | } |
259ccb6c | 3338 | if (dir_in_way(opt->repo->index, path, |
8daec1df | 3339 | !opt->call_depth && !S_ISGITLINK(a->mode), |
c641ca67 | 3340 | 0)) { |
259ccb6c | 3341 | char *new_path = unique_path(opt, path, add_branch); |
9c0bbb50 | 3342 | clean_merge = 0; |
259ccb6c | 3343 | output(opt, 1, _("CONFLICT (%s): There is a directory with name %s in %s. " |
55653a68 | 3344 | "Adding %s as %s"), |
9c0bbb50 | 3345 | conf, path, other_branch, path, new_path); |
8daec1df | 3346 | if (update_file(opt, 0, contents, new_path)) |
75456f96 | 3347 | clean_merge = -1; |
259ccb6c EN |
3348 | else if (opt->call_depth) |
3349 | remove_file_from_index(opt->repo->index, path); | |
3d6b8e88 | 3350 | free(new_path); |
9c0bbb50 | 3351 | } else { |
259ccb6c | 3352 | output(opt, 2, _("Adding %s"), path); |
35a74abf | 3353 | /* do not overwrite file if already present */ |
8daec1df | 3354 | if (update_file_flags(opt, contents, path, 1, !a_valid)) |
75456f96 | 3355 | clean_merge = -1; |
9c0bbb50 | 3356 | } |
8daec1df EN |
3357 | } else if (a_valid && b_valid) { |
3358 | if (!o_valid) { | |
dcf28150 | 3359 | /* Case C: Added in both (check for same permissions) */ |
259ccb6c | 3360 | output(opt, 1, |
dcf28150 EN |
3361 | _("CONFLICT (add/add): Merge conflict in %s"), |
3362 | path); | |
259ccb6c | 3363 | clean_merge = handle_file_collision(opt, |
dcf28150 | 3364 | path, NULL, NULL, |
259ccb6c EN |
3365 | opt->branch1, |
3366 | opt->branch2, | |
8daec1df | 3367 | a, b); |
dcf28150 EN |
3368 | } else { |
3369 | /* case D: Modified in both, but differently. */ | |
e62d1123 | 3370 | struct merge_file_info mfi; |
dcf28150 | 3371 | int is_dirty = 0; /* unpack_trees would have bailed if dirty */ |
e62d1123 | 3372 | clean_merge = handle_content_merge(&mfi, opt, path, |
dcf28150 | 3373 | is_dirty, |
8daec1df | 3374 | o, a, b, NULL); |
dcf28150 | 3375 | } |
8daec1df | 3376 | } else if (!o_valid && !a_valid && !b_valid) { |
edd2faf5 EN |
3377 | /* |
3378 | * this entry was deleted altogether. a_mode == 0 means | |
3379 | * we had that path and want to actively remove it. | |
3380 | */ | |
8daec1df | 3381 | remove_file(opt, 1, path, !a->mode); |
edd2faf5 | 3382 | } else |
033abf97 | 3383 | BUG("fatal merge failure, shouldn't happen."); |
37348937 EN |
3384 | |
3385 | return clean_merge; | |
3386 | } | |
3387 | ||
98a1d3d8 EN |
3388 | static int merge_trees_internal(struct merge_options *opt, |
3389 | struct tree *head, | |
3390 | struct tree *merge, | |
ff1bfa2c | 3391 | struct tree *merge_base, |
98a1d3d8 | 3392 | struct tree **result) |
9047ebbc | 3393 | { |
259ccb6c | 3394 | struct index_state *istate = opt->repo->index; |
9047ebbc MV |
3395 | int code, clean; |
3396 | ||
259ccb6c | 3397 | if (opt->subtree_shift) { |
ff1bfa2c EN |
3398 | merge = shift_tree_object(opt->repo, head, merge, |
3399 | opt->subtree_shift); | |
3400 | merge_base = shift_tree_object(opt->repo, head, merge_base, | |
3401 | opt->subtree_shift); | |
9047ebbc MV |
3402 | } |
3403 | ||
ff1bfa2c | 3404 | if (oid_eq(&merge_base->object.oid, &merge->object.oid)) { |
259ccb6c | 3405 | output(opt, 0, _("Already up to date!")); |
9047ebbc MV |
3406 | *result = head; |
3407 | return 1; | |
3408 | } | |
3409 | ||
ff1bfa2c | 3410 | code = unpack_trees_start(opt, merge_base, head, merge); |
9047ebbc | 3411 | |
fadd069d | 3412 | if (code != 0) { |
259ccb6c EN |
3413 | if (show(opt, 4) || opt->call_depth) |
3414 | err(opt, _("merging of trees %s and %s failed"), | |
f2fd0760 | 3415 | oid_to_hex(&head->object.oid), |
3416 | oid_to_hex(&merge->object.oid)); | |
259ccb6c | 3417 | unpack_trees_finish(opt); |
6003303a | 3418 | return -1; |
fadd069d | 3419 | } |
9047ebbc | 3420 | |
0d6caa2d | 3421 | if (unmerged_index(istate)) { |
f172589e EN |
3422 | struct string_list *entries; |
3423 | struct rename_info re_info; | |
9047ebbc | 3424 | int i; |
fc65b00d KW |
3425 | /* |
3426 | * Only need the hashmap while processing entries, so | |
3427 | * initialize it here and free it when we are done running | |
3428 | * through the entries. Keeping it in the merge_options as | |
3429 | * opposed to decaring a local hashmap is for convenience | |
3430 | * so that we don't have to pass it to around. | |
3431 | */ | |
4d7101e2 EN |
3432 | hashmap_init(&opt->current_file_dir_set, path_hashmap_cmp, |
3433 | NULL, 512); | |
259ccb6c EN |
3434 | get_files_dirs(opt, head); |
3435 | get_files_dirs(opt, merge); | |
9047ebbc | 3436 | |
259ccb6c | 3437 | entries = get_unmerged(opt->repo->index); |
ff1bfa2c | 3438 | clean = detect_and_process_renames(opt, merge_base, head, merge, |
8ebe7b05 | 3439 | entries, &re_info); |
259ccb6c | 3440 | record_df_conflict_files(opt, entries); |
75456f96 | 3441 | if (clean < 0) |
e336bdc5 | 3442 | goto cleanup; |
edd2faf5 | 3443 | for (i = entries->nr-1; 0 <= i; i--) { |
9047ebbc MV |
3444 | const char *path = entries->items[i].string; |
3445 | struct stage_data *e = entries->items[i].util; | |
75456f96 | 3446 | if (!e->processed) { |
259ccb6c | 3447 | int ret = process_entry(opt, path, e); |
75456f96 JS |
3448 | if (!ret) |
3449 | clean = 0; | |
e336bdc5 KW |
3450 | else if (ret < 0) { |
3451 | clean = ret; | |
3452 | goto cleanup; | |
3453 | } | |
75456f96 | 3454 | } |
9047ebbc | 3455 | } |
7edba4c4 JH |
3456 | for (i = 0; i < entries->nr; i++) { |
3457 | struct stage_data *e = entries->items[i].util; | |
3458 | if (!e->processed) | |
033abf97 | 3459 | BUG("unprocessed path??? %s", |
7edba4c4 JH |
3460 | entries->items[i].string); |
3461 | } | |
9047ebbc | 3462 | |
93665365 | 3463 | cleanup: |
ffc16c49 | 3464 | final_cleanup_renames(&re_info); |
f172589e | 3465 | |
9047ebbc | 3466 | string_list_clear(entries, 1); |
f172589e | 3467 | free(entries); |
9047ebbc | 3468 | |
259ccb6c | 3469 | hashmap_free(&opt->current_file_dir_set, 1); |
fc65b00d | 3470 | |
3f1c1c36 | 3471 | if (clean < 0) { |
259ccb6c | 3472 | unpack_trees_finish(opt); |
e336bdc5 | 3473 | return clean; |
3f1c1c36 | 3474 | } |
9047ebbc MV |
3475 | } |
3476 | else | |
3477 | clean = 1; | |
3478 | ||
259ccb6c | 3479 | unpack_trees_finish(opt); |
a35edc84 | 3480 | |
724dd767 EN |
3481 | if (opt->call_depth && |
3482 | !(*result = write_in_core_index_as_tree(opt->repo))) | |
fbc87eb5 | 3483 | return -1; |
9047ebbc MV |
3484 | |
3485 | return clean; | |
3486 | } | |
3487 | ||
3488 | static struct commit_list *reverse_commit_list(struct commit_list *list) | |
3489 | { | |
3490 | struct commit_list *next = NULL, *current, *backup; | |
3491 | for (current = list; current; current = backup) { | |
3492 | backup = current->next; | |
3493 | current->next = next; | |
3494 | next = current; | |
3495 | } | |
3496 | return next; | |
3497 | } | |
3498 | ||
3499 | /* | |
3500 | * Merge the commits h1 and h2, return the resulting virtual | |
3501 | * commit object and a flag indicating the cleanness of the merge. | |
3502 | */ | |
98a1d3d8 EN |
3503 | static int merge_recursive_internal(struct merge_options *opt, |
3504 | struct commit *h1, | |
3505 | struct commit *h2, | |
ff1bfa2c | 3506 | struct commit_list *merge_bases, |
98a1d3d8 | 3507 | struct commit **result) |
9047ebbc MV |
3508 | { |
3509 | struct commit_list *iter; | |
ff1bfa2c | 3510 | struct commit *merged_merge_bases; |
bab56877 | 3511 | struct tree *result_tree; |
9047ebbc | 3512 | int clean; |
743474cb EN |
3513 | const char *ancestor_name; |
3514 | struct strbuf merge_base_abbrev = STRBUF_INIT; | |
3515 | ||
259ccb6c EN |
3516 | if (show(opt, 4)) { |
3517 | output(opt, 4, _("Merging:")); | |
3518 | output_commit_title(opt, h1); | |
3519 | output_commit_title(opt, h2); | |
9047ebbc MV |
3520 | } |
3521 | ||
ff1bfa2c EN |
3522 | if (!merge_bases) { |
3523 | merge_bases = get_merge_bases(h1, h2); | |
3524 | merge_bases = reverse_commit_list(merge_bases); | |
9047ebbc MV |
3525 | } |
3526 | ||
259ccb6c | 3527 | if (show(opt, 5)) { |
ff1bfa2c | 3528 | unsigned cnt = commit_list_count(merge_bases); |
e0453cd8 | 3529 | |
259ccb6c | 3530 | output(opt, 5, Q_("found %u common ancestor:", |
e0453cd8 | 3531 | "found %u common ancestors:", cnt), cnt); |
ff1bfa2c | 3532 | for (iter = merge_bases; iter; iter = iter->next) |
259ccb6c | 3533 | output_commit_title(opt, iter->item); |
9047ebbc MV |
3534 | } |
3535 | ||
ff1bfa2c EN |
3536 | merged_merge_bases = pop_commit(&merge_bases); |
3537 | if (merged_merge_bases == NULL) { | |
03f622c8 JN |
3538 | /* if there is no common ancestor, use an empty tree */ |
3539 | struct tree *tree; | |
9047ebbc | 3540 | |
259ccb6c | 3541 | tree = lookup_tree(opt->repo, opt->repo->hash_algo->empty_tree); |
ff1bfa2c EN |
3542 | merged_merge_bases = make_virtual_commit(opt->repo, tree, |
3543 | "ancestor"); | |
743474cb | 3544 | ancestor_name = "empty tree"; |
ff1bfa2c | 3545 | } else if (merge_bases) { |
743474cb EN |
3546 | ancestor_name = "merged common ancestors"; |
3547 | } else { | |
3548 | strbuf_add_unique_abbrev(&merge_base_abbrev, | |
ff1bfa2c | 3549 | &merged_merge_bases->object.oid, |
743474cb EN |
3550 | DEFAULT_ABBREV); |
3551 | ancestor_name = merge_base_abbrev.buf; | |
9047ebbc MV |
3552 | } |
3553 | ||
ff1bfa2c | 3554 | for (iter = merge_bases; iter; iter = iter->next) { |
8a2fce18 | 3555 | const char *saved_b1, *saved_b2; |
259ccb6c | 3556 | opt->call_depth++; |
9047ebbc MV |
3557 | /* |
3558 | * When the merge fails, the result contains files | |
3559 | * with conflict markers. The cleanness flag is | |
de8946de JS |
3560 | * ignored (unless indicating an error), it was never |
3561 | * actually used, as result of merge_trees has always | |
3562 | * overwritten it: the committed "conflicts" were | |
3563 | * already resolved. | |
9047ebbc | 3564 | */ |
259ccb6c EN |
3565 | discard_index(opt->repo->index); |
3566 | saved_b1 = opt->branch1; | |
3567 | saved_b2 = opt->branch2; | |
3568 | opt->branch1 = "Temporary merge branch 1"; | |
3569 | opt->branch2 = "Temporary merge branch 2"; | |
ff1bfa2c EN |
3570 | if (merge_recursive_internal(opt, merged_merge_bases, iter->item, |
3571 | NULL, &merged_merge_bases) < 0) | |
de8946de | 3572 | return -1; |
259ccb6c EN |
3573 | opt->branch1 = saved_b1; |
3574 | opt->branch2 = saved_b2; | |
3575 | opt->call_depth--; | |
9047ebbc | 3576 | |
ff1bfa2c | 3577 | if (!merged_merge_bases) |
259ccb6c | 3578 | return err(opt, _("merge returned no commit")); |
9047ebbc MV |
3579 | } |
3580 | ||
259ccb6c EN |
3581 | discard_index(opt->repo->index); |
3582 | if (!opt->call_depth) | |
3583 | repo_read_index(opt->repo); | |
9047ebbc | 3584 | |
743474cb | 3585 | opt->ancestor = ancestor_name; |
98a1d3d8 EN |
3586 | clean = merge_trees_internal(opt, |
3587 | repo_get_commit_tree(opt->repo, h1), | |
3588 | repo_get_commit_tree(opt->repo, h2), | |
3589 | repo_get_commit_tree(opt->repo, | |
ff1bfa2c | 3590 | merged_merge_bases), |
bab56877 | 3591 | &result_tree); |
743474cb | 3592 | strbuf_release(&merge_base_abbrev); |
6999bc70 | 3593 | if (clean < 0) { |
259ccb6c | 3594 | flush_output(opt); |
de8946de | 3595 | return clean; |
6999bc70 | 3596 | } |
9047ebbc | 3597 | |
259ccb6c | 3598 | if (opt->call_depth) { |
bab56877 EN |
3599 | *result = make_virtual_commit(opt->repo, result_tree, |
3600 | "merged tree"); | |
9047ebbc MV |
3601 | commit_list_insert(h1, &(*result)->parents); |
3602 | commit_list_insert(h2, &(*result)->parents->next); | |
3603 | } | |
259ccb6c EN |
3604 | flush_output(opt); |
3605 | if (!opt->call_depth && opt->buffer_output < 2) | |
3606 | strbuf_release(&opt->obuf); | |
9047ebbc MV |
3607 | return clean; |
3608 | } | |
3609 | ||
98a1d3d8 EN |
3610 | static int merge_start(struct merge_options *opt, struct tree *head) |
3611 | { | |
3612 | struct strbuf sb = STRBUF_INIT; | |
3613 | ||
3614 | if (repo_index_has_changes(opt->repo, head, &sb)) { | |
3615 | err(opt, _("Your local changes to the following files would be overwritten by merge:\n %s"), | |
3616 | sb.buf); | |
3617 | strbuf_release(&sb); | |
3618 | return -1; | |
3619 | } | |
3620 | ||
3621 | return 0; | |
3622 | } | |
3623 | ||
3624 | static void merge_finalize(struct merge_options *opt) | |
3625 | { | |
345480d1 EN |
3626 | if (show(opt, 2)) |
3627 | diff_warn_rename_limit("merge.renamelimit", | |
3628 | opt->needed_rename_limit, 0); | |
98a1d3d8 EN |
3629 | } |
3630 | ||
3631 | int merge_trees(struct merge_options *opt, | |
3632 | struct tree *head, | |
3633 | struct tree *merge, | |
ff1bfa2c | 3634 | struct tree *merge_base) |
98a1d3d8 EN |
3635 | { |
3636 | int clean; | |
b4db8a2b | 3637 | struct tree *ignored; |
98a1d3d8 EN |
3638 | |
3639 | assert(opt->ancestor != NULL); | |
3640 | ||
3641 | if (merge_start(opt, head)) | |
3642 | return -1; | |
ff1bfa2c | 3643 | clean = merge_trees_internal(opt, head, merge, merge_base, &ignored); |
98a1d3d8 EN |
3644 | merge_finalize(opt); |
3645 | ||
3646 | return clean; | |
3647 | } | |
3648 | ||
3649 | int merge_recursive(struct merge_options *opt, | |
3650 | struct commit *h1, | |
3651 | struct commit *h2, | |
ff1bfa2c | 3652 | struct commit_list *merge_bases, |
98a1d3d8 EN |
3653 | struct commit **result) |
3654 | { | |
3655 | int clean; | |
3656 | ||
3657 | assert(opt->ancestor == NULL); | |
3658 | ||
3659 | if (merge_start(opt, repo_get_commit_tree(opt->repo, h1))) | |
3660 | return -1; | |
ff1bfa2c | 3661 | clean = merge_recursive_internal(opt, h1, h2, merge_bases, result); |
98a1d3d8 EN |
3662 | merge_finalize(opt); |
3663 | ||
3664 | return clean; | |
3665 | } | |
3666 | ||
4d7101e2 EN |
3667 | static struct commit *get_ref(struct repository *repo, |
3668 | const struct object_id *oid, | |
d7cf3a96 | 3669 | const char *name) |
73118f89 SB |
3670 | { |
3671 | struct object *object; | |
3672 | ||
d7cf3a96 NTND |
3673 | object = deref_tag(repo, parse_object(repo, oid), |
3674 | name, strlen(name)); | |
73118f89 SB |
3675 | if (!object) |
3676 | return NULL; | |
3677 | if (object->type == OBJ_TREE) | |
d7cf3a96 | 3678 | return make_virtual_commit(repo, (struct tree*)object, name); |
73118f89 SB |
3679 | if (object->type != OBJ_COMMIT) |
3680 | return NULL; | |
3681 | if (parse_commit((struct commit *)object)) | |
3682 | return NULL; | |
3683 | return (struct commit *)object; | |
3684 | } | |
3685 | ||
259ccb6c | 3686 | int merge_recursive_generic(struct merge_options *opt, |
4e8161a8 | 3687 | const struct object_id *head, |
3688 | const struct object_id *merge, | |
ff1bfa2c EN |
3689 | int num_merge_bases, |
3690 | const struct object_id **merge_bases, | |
8a2fce18 | 3691 | struct commit **result) |
73118f89 | 3692 | { |
03b86647 | 3693 | int clean; |
837e34eb | 3694 | struct lock_file lock = LOCK_INIT; |
259ccb6c EN |
3695 | struct commit *head_commit = get_ref(opt->repo, head, opt->branch1); |
3696 | struct commit *next_commit = get_ref(opt->repo, merge, opt->branch2); | |
73118f89 SB |
3697 | struct commit_list *ca = NULL; |
3698 | ||
ff1bfa2c | 3699 | if (merge_bases) { |
73118f89 | 3700 | int i; |
ff1bfa2c | 3701 | for (i = 0; i < num_merge_bases; ++i) { |
73118f89 | 3702 | struct commit *base; |
ff1bfa2c EN |
3703 | if (!(base = get_ref(opt->repo, merge_bases[i], |
3704 | oid_to_hex(merge_bases[i])))) | |
259ccb6c | 3705 | return err(opt, _("Could not parse object '%s'"), |
ff1bfa2c | 3706 | oid_to_hex(merge_bases[i])); |
73118f89 SB |
3707 | commit_list_insert(base, &ca); |
3708 | } | |
3709 | } | |
3710 | ||
259ccb6c EN |
3711 | repo_hold_locked_index(opt->repo, &lock, LOCK_DIE_ON_ERROR); |
3712 | clean = merge_recursive(opt, head_commit, next_commit, ca, | |
d90e759f | 3713 | result); |
51d3f43d MÅ |
3714 | if (clean < 0) { |
3715 | rollback_lock_file(&lock); | |
de8946de | 3716 | return clean; |
51d3f43d | 3717 | } |
de8946de | 3718 | |
259ccb6c | 3719 | if (write_locked_index(opt->repo->index, &lock, |
61000814 | 3720 | COMMIT_LOCK | SKIP_IF_UNCHANGED)) |
259ccb6c | 3721 | return err(opt, _("Unable to write index.")); |
73118f89 SB |
3722 | |
3723 | return clean ? 0 : 1; | |
3724 | } | |
3725 | ||
259ccb6c | 3726 | static void merge_recursive_config(struct merge_options *opt) |
9047ebbc | 3727 | { |
85b46030 | 3728 | char *value = NULL; |
259ccb6c EN |
3729 | git_config_get_int("merge.verbosity", &opt->verbosity); |
3730 | git_config_get_int("diff.renamelimit", &opt->diff_rename_limit); | |
3731 | git_config_get_int("merge.renamelimit", &opt->merge_rename_limit); | |
85b46030 | 3732 | if (!git_config_get_string("diff.renames", &value)) { |
259ccb6c | 3733 | opt->diff_detect_rename = git_config_rename("diff.renames", value); |
85b46030 BP |
3734 | free(value); |
3735 | } | |
3736 | if (!git_config_get_string("merge.renames", &value)) { | |
259ccb6c | 3737 | opt->merge_detect_rename = git_config_rename("merge.renames", value); |
85b46030 BP |
3738 | free(value); |
3739 | } | |
8c8e5bd6 EN |
3740 | if (!git_config_get_string("merge.directoryrenames", &value)) { |
3741 | int boolval = git_parse_maybe_bool(value); | |
3742 | if (0 <= boolval) { | |
8e012516 DS |
3743 | opt->detect_directory_renames = boolval ? |
3744 | MERGE_DIRECTORY_RENAMES_TRUE : | |
3745 | MERGE_DIRECTORY_RENAMES_NONE; | |
8c8e5bd6 | 3746 | } else if (!strcasecmp(value, "conflict")) { |
8e012516 DS |
3747 | opt->detect_directory_renames = |
3748 | MERGE_DIRECTORY_RENAMES_CONFLICT; | |
8c8e5bd6 | 3749 | } /* avoid erroring on values from future versions of git */ |
85b46030 BP |
3750 | free(value); |
3751 | } | |
0e7bcb1b | 3752 | git_config(git_xmerge_config, NULL); |
9047ebbc MV |
3753 | } |
3754 | ||
259ccb6c | 3755 | void init_merge_options(struct merge_options *opt, |
0d6caa2d | 3756 | struct repository *repo) |
9047ebbc | 3757 | { |
80486220 | 3758 | const char *merge_verbosity; |
259ccb6c EN |
3759 | memset(opt, 0, sizeof(struct merge_options)); |
3760 | opt->repo = repo; | |
3761 | opt->verbosity = 2; | |
3762 | opt->buffer_output = 1; | |
3763 | opt->diff_rename_limit = -1; | |
3764 | opt->merge_rename_limit = -1; | |
3765 | opt->renormalize = 0; | |
3766 | opt->diff_detect_rename = -1; | |
3767 | opt->merge_detect_rename = -1; | |
8e012516 | 3768 | opt->detect_directory_renames = MERGE_DIRECTORY_RENAMES_CONFLICT; |
259ccb6c | 3769 | merge_recursive_config(opt); |
80486220 AO |
3770 | merge_verbosity = getenv("GIT_MERGE_VERBOSITY"); |
3771 | if (merge_verbosity) | |
259ccb6c EN |
3772 | opt->verbosity = strtol(merge_verbosity, NULL, 10); |
3773 | if (opt->verbosity >= 5) | |
3774 | opt->buffer_output = 0; | |
3775 | strbuf_init(&opt->obuf, 0); | |
3776 | string_list_init(&opt->df_conflict_file_set, 1); | |
9047ebbc | 3777 | } |
635a7bb1 | 3778 | |
259ccb6c | 3779 | int parse_merge_opt(struct merge_options *opt, const char *s) |
635a7bb1 | 3780 | { |
95b567c7 JK |
3781 | const char *arg; |
3782 | ||
635a7bb1 JN |
3783 | if (!s || !*s) |
3784 | return -1; | |
3785 | if (!strcmp(s, "ours")) | |
259ccb6c | 3786 | opt->recursive_variant = MERGE_RECURSIVE_OURS; |
635a7bb1 | 3787 | else if (!strcmp(s, "theirs")) |
259ccb6c | 3788 | opt->recursive_variant = MERGE_RECURSIVE_THEIRS; |
635a7bb1 | 3789 | else if (!strcmp(s, "subtree")) |
259ccb6c | 3790 | opt->subtree_shift = ""; |
95b567c7 | 3791 | else if (skip_prefix(s, "subtree=", &arg)) |
259ccb6c | 3792 | opt->subtree_shift = arg; |
58a1ece4 | 3793 | else if (!strcmp(s, "patience")) |
259ccb6c | 3794 | opt->xdl_opts = DIFF_WITH_ALG(opt, PATIENCE_DIFF); |
8c912eea | 3795 | else if (!strcmp(s, "histogram")) |
259ccb6c | 3796 | opt->xdl_opts = DIFF_WITH_ALG(opt, HISTOGRAM_DIFF); |
95b567c7 JK |
3797 | else if (skip_prefix(s, "diff-algorithm=", &arg)) { |
3798 | long value = parse_algorithm_value(arg); | |
07924d4d MP |
3799 | if (value < 0) |
3800 | return -1; | |
3801 | /* clear out previous settings */ | |
259ccb6c EN |
3802 | DIFF_XDL_CLR(opt, NEED_MINIMAL); |
3803 | opt->xdl_opts &= ~XDF_DIFF_ALGORITHM_MASK; | |
3804 | opt->xdl_opts |= value; | |
07924d4d | 3805 | } |
4e5dd044 | 3806 | else if (!strcmp(s, "ignore-space-change")) |
259ccb6c | 3807 | DIFF_XDL_SET(opt, IGNORE_WHITESPACE_CHANGE); |
4e5dd044 | 3808 | else if (!strcmp(s, "ignore-all-space")) |
259ccb6c | 3809 | DIFF_XDL_SET(opt, IGNORE_WHITESPACE); |
4e5dd044 | 3810 | else if (!strcmp(s, "ignore-space-at-eol")) |
259ccb6c | 3811 | DIFF_XDL_SET(opt, IGNORE_WHITESPACE_AT_EOL); |
e9282f02 | 3812 | else if (!strcmp(s, "ignore-cr-at-eol")) |
259ccb6c | 3813 | DIFF_XDL_SET(opt, IGNORE_CR_AT_EOL); |
635a7bb1 | 3814 | else if (!strcmp(s, "renormalize")) |
259ccb6c | 3815 | opt->renormalize = 1; |
635a7bb1 | 3816 | else if (!strcmp(s, "no-renormalize")) |
259ccb6c | 3817 | opt->renormalize = 0; |
d2b11eca | 3818 | else if (!strcmp(s, "no-renames")) |
259ccb6c | 3819 | opt->merge_detect_rename = 0; |
87892f60 | 3820 | else if (!strcmp(s, "find-renames")) { |
259ccb6c EN |
3821 | opt->merge_detect_rename = 1; |
3822 | opt->rename_score = 0; | |
87892f60 | 3823 | } |
1b47ad16 FGA |
3824 | else if (skip_prefix(s, "find-renames=", &arg) || |
3825 | skip_prefix(s, "rename-threshold=", &arg)) { | |
259ccb6c | 3826 | if ((opt->rename_score = parse_rename_score(&arg)) == -1 || *arg != 0) |
10ae7526 | 3827 | return -1; |
259ccb6c | 3828 | opt->merge_detect_rename = 1; |
10ae7526 | 3829 | } |
5a59a230 NTND |
3830 | /* |
3831 | * Please update $__git_merge_strategy_options in | |
3832 | * git-completion.bash when you add new options | |
3833 | */ | |
635a7bb1 JN |
3834 | else |
3835 | return -1; | |
3836 | return 0; | |
3837 | } |