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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 | */ | |
4c371f91 | 6 | #include "advice.h" |
9047ebbc MV |
7 | #include "cache.h" |
8 | #include "cache-tree.h" | |
9 | #include "commit.h" | |
10 | #include "blob.h" | |
11 | #include "builtin.h" | |
12 | #include "tree-walk.h" | |
13 | #include "diff.h" | |
14 | #include "diffcore.h" | |
15 | #include "tag.h" | |
16 | #include "unpack-trees.h" | |
17 | #include "string-list.h" | |
18 | #include "xdiff-interface.h" | |
19 | #include "ll-merge.h" | |
9047ebbc MV |
20 | #include "attr.h" |
21 | #include "merge-recursive.h" | |
9800c0df | 22 | #include "dir.h" |
9047ebbc | 23 | |
85e51b78 JH |
24 | static struct tree *shift_tree_object(struct tree *one, struct tree *two, |
25 | const char *subtree_shift) | |
9047ebbc MV |
26 | { |
27 | unsigned char shifted[20]; | |
28 | ||
85e51b78 JH |
29 | if (!*subtree_shift) { |
30 | shift_tree(one->object.sha1, two->object.sha1, shifted, 0); | |
31 | } else { | |
32 | shift_tree_by(one->object.sha1, two->object.sha1, shifted, | |
33 | subtree_shift); | |
34 | } | |
9047ebbc MV |
35 | if (!hashcmp(two->object.sha1, shifted)) |
36 | return two; | |
37 | return lookup_tree(shifted); | |
38 | } | |
39 | ||
40 | /* | |
a6f63ae0 | 41 | * A virtual commit has (const char *)commit->util set to the name. |
9047ebbc MV |
42 | */ |
43 | ||
2af202be | 44 | static struct commit *make_virtual_commit(struct tree *tree, const char *comment) |
9047ebbc MV |
45 | { |
46 | struct commit *commit = xcalloc(1, sizeof(struct commit)); | |
9047ebbc MV |
47 | commit->tree = tree; |
48 | commit->util = (void*)comment; | |
9047ebbc MV |
49 | /* avoid warnings */ |
50 | commit->object.parsed = 1; | |
51 | return commit; | |
52 | } | |
53 | ||
54 | /* | |
55 | * Since we use get_tree_entry(), which does not put the read object into | |
56 | * the object pool, we cannot rely on a == b. | |
57 | */ | |
58 | static int sha_eq(const unsigned char *a, const unsigned char *b) | |
59 | { | |
60 | if (!a && !b) | |
61 | return 2; | |
62 | return a && b && hashcmp(a, b) == 0; | |
63 | } | |
64 | ||
65 | /* | |
66 | * Since we want to write the index eventually, we cannot reuse the index | |
67 | * for these (temporary) data. | |
68 | */ | |
69 | struct stage_data | |
70 | { | |
71 | struct | |
72 | { | |
73 | unsigned mode; | |
74 | unsigned char sha[20]; | |
75 | } stages[4]; | |
76 | unsigned processed:1; | |
77 | }; | |
78 | ||
8a2fce18 | 79 | static int show(struct merge_options *o, int v) |
9047ebbc | 80 | { |
5033639c | 81 | return (!o->call_depth && o->verbosity >= v) || o->verbosity >= 5; |
9047ebbc MV |
82 | } |
83 | ||
c7d84924 | 84 | static void flush_output(struct merge_options *o) |
9047ebbc | 85 | { |
c7d84924 MV |
86 | if (o->obuf.len) { |
87 | fputs(o->obuf.buf, stdout); | |
88 | strbuf_reset(&o->obuf); | |
9047ebbc MV |
89 | } |
90 | } | |
91 | ||
28bea9e5 | 92 | __attribute__((format (printf, 3, 4))) |
8a2fce18 | 93 | static void output(struct merge_options *o, int v, const char *fmt, ...) |
9047ebbc MV |
94 | { |
95 | int len; | |
96 | va_list ap; | |
97 | ||
8a2fce18 | 98 | if (!show(o, v)) |
9047ebbc MV |
99 | return; |
100 | ||
c7d84924 MV |
101 | strbuf_grow(&o->obuf, o->call_depth * 2 + 2); |
102 | memset(o->obuf.buf + o->obuf.len, ' ', o->call_depth * 2); | |
103 | strbuf_setlen(&o->obuf, o->obuf.len + o->call_depth * 2); | |
9047ebbc MV |
104 | |
105 | va_start(ap, fmt); | |
c7d84924 | 106 | len = vsnprintf(o->obuf.buf + o->obuf.len, strbuf_avail(&o->obuf), fmt, ap); |
9047ebbc MV |
107 | va_end(ap); |
108 | ||
109 | if (len < 0) | |
110 | len = 0; | |
c7d84924 MV |
111 | if (len >= strbuf_avail(&o->obuf)) { |
112 | strbuf_grow(&o->obuf, len + 2); | |
9047ebbc | 113 | va_start(ap, fmt); |
c7d84924 | 114 | len = vsnprintf(o->obuf.buf + o->obuf.len, strbuf_avail(&o->obuf), fmt, ap); |
9047ebbc | 115 | va_end(ap); |
c7d84924 | 116 | if (len >= strbuf_avail(&o->obuf)) { |
9047ebbc MV |
117 | die("this should not happen, your snprintf is broken"); |
118 | } | |
119 | } | |
c7d84924 MV |
120 | strbuf_setlen(&o->obuf, o->obuf.len + len); |
121 | strbuf_add(&o->obuf, "\n", 1); | |
8a2fce18 | 122 | if (!o->buffer_output) |
c7d84924 | 123 | flush_output(o); |
9047ebbc MV |
124 | } |
125 | ||
5033639c | 126 | static void output_commit_title(struct merge_options *o, struct commit *commit) |
9047ebbc MV |
127 | { |
128 | int i; | |
c7d84924 | 129 | flush_output(o); |
5033639c | 130 | for (i = o->call_depth; i--;) |
9047ebbc MV |
131 | fputs(" ", stdout); |
132 | if (commit->util) | |
133 | printf("virtual %s\n", (char *)commit->util); | |
134 | else { | |
135 | printf("%s ", find_unique_abbrev(commit->object.sha1, DEFAULT_ABBREV)); | |
136 | if (parse_commit(commit) != 0) | |
137 | printf("(bad commit)\n"); | |
138 | else { | |
139 | const char *s; | |
140 | int len; | |
141 | for (s = commit->buffer; *s; s++) | |
142 | if (*s == '\n' && s[1] == '\n') { | |
143 | s += 2; | |
144 | break; | |
145 | } | |
146 | for (len = 0; s[len] && '\n' != s[len]; len++) | |
147 | ; /* do nothing */ | |
148 | printf("%.*s\n", len, s); | |
149 | } | |
150 | } | |
151 | } | |
152 | ||
153 | static int add_cacheinfo(unsigned int mode, const unsigned char *sha1, | |
154 | const char *path, int stage, int refresh, int options) | |
155 | { | |
156 | struct cache_entry *ce; | |
157 | ce = make_cache_entry(mode, sha1 ? sha1 : null_sha1, path, stage, refresh); | |
158 | if (!ce) | |
159 | return error("addinfo_cache failed for path '%s'", path); | |
160 | return add_cache_entry(ce, options); | |
161 | } | |
162 | ||
9047ebbc MV |
163 | static void init_tree_desc_from_tree(struct tree_desc *desc, struct tree *tree) |
164 | { | |
165 | parse_tree(tree); | |
166 | init_tree_desc(desc, tree->buffer, tree->size); | |
167 | } | |
168 | ||
169 | static int git_merge_trees(int index_only, | |
170 | struct tree *common, | |
171 | struct tree *head, | |
172 | struct tree *merge) | |
173 | { | |
174 | int rc; | |
175 | struct tree_desc t[3]; | |
176 | struct unpack_trees_options opts; | |
177 | ||
178 | memset(&opts, 0, sizeof(opts)); | |
179 | if (index_only) | |
180 | opts.index_only = 1; | |
181 | else | |
182 | opts.update = 1; | |
183 | opts.merge = 1; | |
184 | opts.head_idx = 2; | |
185 | opts.fn = threeway_merge; | |
186 | opts.src_index = &the_index; | |
187 | opts.dst_index = &the_index; | |
264b774b | 188 | opts.msgs = get_porcelain_error_msgs(); |
9047ebbc MV |
189 | |
190 | init_tree_desc_from_tree(t+0, common); | |
191 | init_tree_desc_from_tree(t+1, head); | |
192 | init_tree_desc_from_tree(t+2, merge); | |
193 | ||
194 | rc = unpack_trees(3, t, &opts); | |
195 | cache_tree_free(&active_cache_tree); | |
196 | return rc; | |
197 | } | |
198 | ||
8a2fce18 | 199 | struct tree *write_tree_from_memory(struct merge_options *o) |
9047ebbc MV |
200 | { |
201 | struct tree *result = NULL; | |
202 | ||
203 | if (unmerged_cache()) { | |
204 | int i; | |
19c6a4f8 | 205 | fprintf(stderr, "BUG: There are unmerged index entries:\n"); |
9047ebbc MV |
206 | for (i = 0; i < active_nr; i++) { |
207 | struct cache_entry *ce = active_cache[i]; | |
208 | if (ce_stage(ce)) | |
19c6a4f8 JH |
209 | fprintf(stderr, "BUG: %d %.*s", ce_stage(ce), |
210 | (int)ce_namelen(ce), ce->name); | |
9047ebbc | 211 | } |
19c6a4f8 | 212 | die("Bug in merge-recursive.c"); |
9047ebbc MV |
213 | } |
214 | ||
215 | if (!active_cache_tree) | |
216 | active_cache_tree = cache_tree(); | |
217 | ||
218 | if (!cache_tree_fully_valid(active_cache_tree) && | |
219 | cache_tree_update(active_cache_tree, | |
220 | active_cache, active_nr, 0, 0) < 0) | |
221 | die("error building trees"); | |
222 | ||
223 | result = lookup_tree(active_cache_tree->sha1); | |
224 | ||
225 | return result; | |
226 | } | |
227 | ||
228 | static int save_files_dirs(const unsigned char *sha1, | |
229 | const char *base, int baselen, const char *path, | |
230 | unsigned int mode, int stage, void *context) | |
231 | { | |
232 | int len = strlen(path); | |
233 | char *newpath = xmalloc(baselen + len + 1); | |
696ee23c MV |
234 | struct merge_options *o = context; |
235 | ||
9047ebbc MV |
236 | memcpy(newpath, base, baselen); |
237 | memcpy(newpath + baselen, path, len); | |
238 | newpath[baselen + len] = '\0'; | |
239 | ||
240 | if (S_ISDIR(mode)) | |
696ee23c | 241 | string_list_insert(newpath, &o->current_directory_set); |
9047ebbc | 242 | else |
696ee23c | 243 | string_list_insert(newpath, &o->current_file_set); |
9047ebbc MV |
244 | free(newpath); |
245 | ||
d3bee161 | 246 | return (S_ISDIR(mode) ? READ_TREE_RECURSIVE : 0); |
9047ebbc MV |
247 | } |
248 | ||
696ee23c | 249 | static int get_files_dirs(struct merge_options *o, struct tree *tree) |
9047ebbc MV |
250 | { |
251 | int n; | |
696ee23c | 252 | if (read_tree_recursive(tree, "", 0, 0, NULL, save_files_dirs, o)) |
9047ebbc | 253 | return 0; |
696ee23c | 254 | n = o->current_file_set.nr + o->current_directory_set.nr; |
9047ebbc MV |
255 | return n; |
256 | } | |
257 | ||
258 | /* | |
259 | * Returns an index_entry instance which doesn't have to correspond to | |
260 | * a real cache entry in Git's index. | |
261 | */ | |
262 | static struct stage_data *insert_stage_data(const char *path, | |
263 | struct tree *o, struct tree *a, struct tree *b, | |
264 | struct string_list *entries) | |
265 | { | |
266 | struct string_list_item *item; | |
267 | struct stage_data *e = xcalloc(1, sizeof(struct stage_data)); | |
268 | get_tree_entry(o->object.sha1, path, | |
269 | e->stages[1].sha, &e->stages[1].mode); | |
270 | get_tree_entry(a->object.sha1, path, | |
271 | e->stages[2].sha, &e->stages[2].mode); | |
272 | get_tree_entry(b->object.sha1, path, | |
273 | e->stages[3].sha, &e->stages[3].mode); | |
274 | item = string_list_insert(path, entries); | |
275 | item->util = e; | |
276 | return e; | |
277 | } | |
278 | ||
279 | /* | |
280 | * Create a dictionary mapping file names to stage_data objects. The | |
281 | * dictionary contains one entry for every path with a non-zero stage entry. | |
282 | */ | |
283 | static struct string_list *get_unmerged(void) | |
284 | { | |
285 | struct string_list *unmerged = xcalloc(1, sizeof(struct string_list)); | |
286 | int i; | |
287 | ||
288 | unmerged->strdup_strings = 1; | |
289 | ||
290 | for (i = 0; i < active_nr; i++) { | |
291 | struct string_list_item *item; | |
292 | struct stage_data *e; | |
293 | struct cache_entry *ce = active_cache[i]; | |
294 | if (!ce_stage(ce)) | |
295 | continue; | |
296 | ||
297 | item = string_list_lookup(ce->name, unmerged); | |
298 | if (!item) { | |
299 | item = string_list_insert(ce->name, unmerged); | |
300 | item->util = xcalloc(1, sizeof(struct stage_data)); | |
301 | } | |
302 | e = item->util; | |
303 | e->stages[ce_stage(ce)].mode = ce->ce_mode; | |
304 | hashcpy(e->stages[ce_stage(ce)].sha, ce->sha1); | |
305 | } | |
306 | ||
307 | return unmerged; | |
308 | } | |
309 | ||
310 | struct rename | |
311 | { | |
312 | struct diff_filepair *pair; | |
313 | struct stage_data *src_entry; | |
314 | struct stage_data *dst_entry; | |
315 | unsigned processed:1; | |
316 | }; | |
317 | ||
318 | /* | |
319 | * Get information of all renames which occurred between 'o_tree' and | |
320 | * 'tree'. We need the three trees in the merge ('o_tree', 'a_tree' and | |
321 | * 'b_tree') to be able to associate the correct cache entries with | |
322 | * the rename information. 'tree' is always equal to either a_tree or b_tree. | |
323 | */ | |
8a2fce18 MV |
324 | static struct string_list *get_renames(struct merge_options *o, |
325 | struct tree *tree, | |
326 | struct tree *o_tree, | |
327 | struct tree *a_tree, | |
328 | struct tree *b_tree, | |
329 | struct string_list *entries) | |
9047ebbc MV |
330 | { |
331 | int i; | |
332 | struct string_list *renames; | |
333 | struct diff_options opts; | |
334 | ||
335 | renames = xcalloc(1, sizeof(struct string_list)); | |
336 | diff_setup(&opts); | |
337 | DIFF_OPT_SET(&opts, RECURSIVE); | |
338 | opts.detect_rename = DIFF_DETECT_RENAME; | |
8a2fce18 MV |
339 | opts.rename_limit = o->merge_rename_limit >= 0 ? o->merge_rename_limit : |
340 | o->diff_rename_limit >= 0 ? o->diff_rename_limit : | |
9047ebbc MV |
341 | 500; |
342 | opts.warn_on_too_large_rename = 1; | |
343 | opts.output_format = DIFF_FORMAT_NO_OUTPUT; | |
344 | if (diff_setup_done(&opts) < 0) | |
345 | die("diff setup failed"); | |
346 | diff_tree_sha1(o_tree->object.sha1, tree->object.sha1, "", &opts); | |
347 | diffcore_std(&opts); | |
348 | for (i = 0; i < diff_queued_diff.nr; ++i) { | |
349 | struct string_list_item *item; | |
350 | struct rename *re; | |
351 | struct diff_filepair *pair = diff_queued_diff.queue[i]; | |
352 | if (pair->status != 'R') { | |
353 | diff_free_filepair(pair); | |
354 | continue; | |
355 | } | |
356 | re = xmalloc(sizeof(*re)); | |
357 | re->processed = 0; | |
358 | re->pair = pair; | |
359 | item = string_list_lookup(re->pair->one->path, entries); | |
360 | if (!item) | |
361 | re->src_entry = insert_stage_data(re->pair->one->path, | |
362 | o_tree, a_tree, b_tree, entries); | |
363 | else | |
364 | re->src_entry = item->util; | |
365 | ||
366 | item = string_list_lookup(re->pair->two->path, entries); | |
367 | if (!item) | |
368 | re->dst_entry = insert_stage_data(re->pair->two->path, | |
369 | o_tree, a_tree, b_tree, entries); | |
370 | else | |
371 | re->dst_entry = item->util; | |
372 | item = string_list_insert(pair->one->path, renames); | |
373 | item->util = re; | |
374 | } | |
375 | opts.output_format = DIFF_FORMAT_NO_OUTPUT; | |
376 | diff_queued_diff.nr = 0; | |
377 | diff_flush(&opts); | |
378 | return renames; | |
379 | } | |
380 | ||
381 | static int update_stages(const char *path, struct diff_filespec *o, | |
382 | struct diff_filespec *a, struct diff_filespec *b, | |
383 | int clear) | |
384 | { | |
385 | int options = ADD_CACHE_OK_TO_ADD | ADD_CACHE_OK_TO_REPLACE; | |
386 | if (clear) | |
387 | if (remove_file_from_cache(path)) | |
388 | return -1; | |
389 | if (o) | |
390 | if (add_cacheinfo(o->mode, o->sha1, path, 1, 0, options)) | |
391 | return -1; | |
392 | if (a) | |
393 | if (add_cacheinfo(a->mode, a->sha1, path, 2, 0, options)) | |
394 | return -1; | |
395 | if (b) | |
396 | if (add_cacheinfo(b->mode, b->sha1, path, 3, 0, options)) | |
397 | return -1; | |
398 | return 0; | |
399 | } | |
400 | ||
b7fa51da MV |
401 | static int remove_file(struct merge_options *o, int clean, |
402 | const char *path, int no_wd) | |
9047ebbc | 403 | { |
b7fa51da MV |
404 | int update_cache = o->call_depth || clean; |
405 | int update_working_directory = !o->call_depth && !no_wd; | |
9047ebbc MV |
406 | |
407 | if (update_cache) { | |
408 | if (remove_file_from_cache(path)) | |
409 | return -1; | |
410 | } | |
411 | if (update_working_directory) { | |
15dc66ab | 412 | if (remove_path(path) && errno != ENOENT) |
9047ebbc | 413 | return -1; |
9047ebbc MV |
414 | } |
415 | return 0; | |
416 | } | |
417 | ||
696ee23c | 418 | static char *unique_path(struct merge_options *o, const char *path, const char *branch) |
9047ebbc MV |
419 | { |
420 | char *newpath = xmalloc(strlen(path) + 1 + strlen(branch) + 8 + 1); | |
421 | int suffix = 0; | |
422 | struct stat st; | |
423 | char *p = newpath + strlen(path); | |
424 | strcpy(newpath, path); | |
425 | *(p++) = '~'; | |
426 | strcpy(p, branch); | |
427 | for (; *p; ++p) | |
428 | if ('/' == *p) | |
429 | *p = '_'; | |
696ee23c MV |
430 | while (string_list_has_string(&o->current_file_set, newpath) || |
431 | string_list_has_string(&o->current_directory_set, newpath) || | |
9047ebbc MV |
432 | lstat(newpath, &st) == 0) |
433 | sprintf(p, "_%d", suffix++); | |
434 | ||
696ee23c | 435 | string_list_insert(newpath, &o->current_file_set); |
9047ebbc MV |
436 | return newpath; |
437 | } | |
438 | ||
439 | static void flush_buffer(int fd, const char *buf, unsigned long size) | |
440 | { | |
441 | while (size > 0) { | |
442 | long ret = write_in_full(fd, buf, size); | |
443 | if (ret < 0) { | |
444 | /* Ignore epipe */ | |
445 | if (errno == EPIPE) | |
446 | break; | |
d824cbba | 447 | die_errno("merge-recursive"); |
9047ebbc MV |
448 | } else if (!ret) { |
449 | die("merge-recursive: disk full?"); | |
450 | } | |
451 | size -= ret; | |
452 | buf += ret; | |
453 | } | |
454 | } | |
455 | ||
60c91181 JH |
456 | static int would_lose_untracked(const char *path) |
457 | { | |
458 | int pos = cache_name_pos(path, strlen(path)); | |
459 | ||
460 | if (pos < 0) | |
461 | pos = -1 - pos; | |
462 | while (pos < active_nr && | |
463 | !strcmp(path, active_cache[pos]->name)) { | |
464 | /* | |
465 | * If stage #0, it is definitely tracked. | |
466 | * If it has stage #2 then it was tracked | |
467 | * before this merge started. All other | |
468 | * cases the path was not tracked. | |
469 | */ | |
470 | switch (ce_stage(active_cache[pos])) { | |
471 | case 0: | |
472 | case 2: | |
473 | return 0; | |
474 | } | |
475 | pos++; | |
476 | } | |
477 | return file_exists(path); | |
478 | } | |
479 | ||
9047ebbc MV |
480 | static int make_room_for_path(const char *path) |
481 | { | |
482 | int status; | |
483 | const char *msg = "failed to create path '%s'%s"; | |
484 | ||
485 | status = safe_create_leading_directories_const(path); | |
486 | if (status) { | |
487 | if (status == -3) { | |
488 | /* something else exists */ | |
489 | error(msg, path, ": perhaps a D/F conflict?"); | |
490 | return -1; | |
491 | } | |
492 | die(msg, path, ""); | |
493 | } | |
494 | ||
60c91181 JH |
495 | /* |
496 | * Do not unlink a file in the work tree if we are not | |
497 | * tracking it. | |
498 | */ | |
499 | if (would_lose_untracked(path)) | |
500 | return error("refusing to lose untracked file at '%s'", | |
501 | path); | |
502 | ||
9047ebbc MV |
503 | /* Successful unlink is good.. */ |
504 | if (!unlink(path)) | |
505 | return 0; | |
506 | /* .. and so is no existing file */ | |
507 | if (errno == ENOENT) | |
508 | return 0; | |
509 | /* .. but not some other error (who really cares what?) */ | |
510 | return error(msg, path, ": perhaps a D/F conflict?"); | |
511 | } | |
512 | ||
b7fa51da MV |
513 | static void update_file_flags(struct merge_options *o, |
514 | const unsigned char *sha, | |
9047ebbc MV |
515 | unsigned mode, |
516 | const char *path, | |
517 | int update_cache, | |
518 | int update_wd) | |
519 | { | |
b7fa51da | 520 | if (o->call_depth) |
9047ebbc MV |
521 | update_wd = 0; |
522 | ||
523 | if (update_wd) { | |
524 | enum object_type type; | |
525 | void *buf; | |
526 | unsigned long size; | |
527 | ||
528 | if (S_ISGITLINK(mode)) | |
0c44c943 JH |
529 | /* |
530 | * We may later decide to recursively descend into | |
531 | * the submodule directory and update its index | |
532 | * and/or work tree, but we do not do that now. | |
533 | */ | |
534 | goto update_index; | |
9047ebbc MV |
535 | |
536 | buf = read_sha1_file(sha, &type, &size); | |
537 | if (!buf) | |
538 | die("cannot read object %s '%s'", sha1_to_hex(sha), path); | |
539 | if (type != OBJ_BLOB) | |
540 | die("blob expected for %s '%s'", sha1_to_hex(sha), path); | |
541 | if (S_ISREG(mode)) { | |
f285a2d7 | 542 | struct strbuf strbuf = STRBUF_INIT; |
9047ebbc MV |
543 | if (convert_to_working_tree(path, buf, size, &strbuf)) { |
544 | free(buf); | |
545 | size = strbuf.len; | |
546 | buf = strbuf_detach(&strbuf, NULL); | |
547 | } | |
548 | } | |
549 | ||
550 | if (make_room_for_path(path) < 0) { | |
551 | update_wd = 0; | |
552 | free(buf); | |
553 | goto update_index; | |
554 | } | |
555 | if (S_ISREG(mode) || (!has_symlinks && S_ISLNK(mode))) { | |
556 | int fd; | |
557 | if (mode & 0100) | |
558 | mode = 0777; | |
559 | else | |
560 | mode = 0666; | |
561 | fd = open(path, O_WRONLY | O_TRUNC | O_CREAT, mode); | |
562 | if (fd < 0) | |
d824cbba | 563 | die_errno("failed to open '%s'", path); |
9047ebbc MV |
564 | flush_buffer(fd, buf, size); |
565 | close(fd); | |
566 | } else if (S_ISLNK(mode)) { | |
567 | char *lnk = xmemdupz(buf, size); | |
568 | safe_create_leading_directories_const(path); | |
569 | unlink(path); | |
304dcf26 | 570 | if (symlink(lnk, path)) |
d824cbba | 571 | die_errno("failed to symlink '%s'", path); |
9047ebbc MV |
572 | free(lnk); |
573 | } else | |
574 | die("do not know what to do with %06o %s '%s'", | |
575 | mode, sha1_to_hex(sha), path); | |
576 | free(buf); | |
577 | } | |
578 | update_index: | |
579 | if (update_cache) | |
580 | add_cacheinfo(mode, sha, path, 0, update_wd, ADD_CACHE_OK_TO_ADD); | |
581 | } | |
582 | ||
b7fa51da MV |
583 | static void update_file(struct merge_options *o, |
584 | int clean, | |
9047ebbc MV |
585 | const unsigned char *sha, |
586 | unsigned mode, | |
587 | const char *path) | |
588 | { | |
b7fa51da | 589 | update_file_flags(o, sha, mode, path, o->call_depth || clean, !o->call_depth); |
9047ebbc MV |
590 | } |
591 | ||
592 | /* Low level file merging, update and removal */ | |
593 | ||
594 | struct merge_file_info | |
595 | { | |
596 | unsigned char sha[20]; | |
597 | unsigned mode; | |
598 | unsigned clean:1, | |
599 | merge:1; | |
600 | }; | |
601 | ||
b7fa51da MV |
602 | static int merge_3way(struct merge_options *o, |
603 | mmbuffer_t *result_buf, | |
604 | struct diff_filespec *one, | |
9047ebbc MV |
605 | struct diff_filespec *a, |
606 | struct diff_filespec *b, | |
607 | const char *branch1, | |
608 | const char *branch2) | |
609 | { | |
610 | mmfile_t orig, src1, src2; | |
611 | char *name1, *name2; | |
612 | int merge_status; | |
8cc5b290 AP |
613 | int favor; |
614 | ||
615 | if (o->call_depth) | |
616 | favor = 0; | |
617 | else { | |
618 | switch (o->recursive_variant) { | |
619 | case MERGE_RECURSIVE_OURS: | |
620 | favor = XDL_MERGE_FAVOR_OURS; | |
621 | break; | |
622 | case MERGE_RECURSIVE_THEIRS: | |
623 | favor = XDL_MERGE_FAVOR_THEIRS; | |
624 | break; | |
625 | default: | |
626 | favor = 0; | |
627 | break; | |
628 | } | |
629 | } | |
9047ebbc | 630 | |
606475f3 MR |
631 | if (strcmp(a->path, b->path)) { |
632 | name1 = xstrdup(mkpath("%s:%s", branch1, a->path)); | |
633 | name2 = xstrdup(mkpath("%s:%s", branch2, b->path)); | |
634 | } else { | |
635 | name1 = xstrdup(mkpath("%s", branch1)); | |
636 | name2 = xstrdup(mkpath("%s", branch2)); | |
637 | } | |
9047ebbc | 638 | |
06b65939 ML |
639 | read_mmblob(&orig, one->sha1); |
640 | read_mmblob(&src1, a->sha1); | |
641 | read_mmblob(&src2, b->sha1); | |
9047ebbc MV |
642 | |
643 | merge_status = ll_merge(result_buf, a->path, &orig, | |
644 | &src1, name1, &src2, name2, | |
8cc5b290 | 645 | (!!o->call_depth) | (favor << 1)); |
9047ebbc MV |
646 | |
647 | free(name1); | |
648 | free(name2); | |
649 | free(orig.ptr); | |
650 | free(src1.ptr); | |
651 | free(src2.ptr); | |
652 | return merge_status; | |
653 | } | |
654 | ||
b7fa51da MV |
655 | static struct merge_file_info merge_file(struct merge_options *o, |
656 | struct diff_filespec *one, | |
657 | struct diff_filespec *a, | |
658 | struct diff_filespec *b, | |
659 | const char *branch1, | |
660 | const char *branch2) | |
9047ebbc MV |
661 | { |
662 | struct merge_file_info result; | |
663 | result.merge = 0; | |
664 | result.clean = 1; | |
665 | ||
666 | if ((S_IFMT & a->mode) != (S_IFMT & b->mode)) { | |
667 | result.clean = 0; | |
668 | if (S_ISREG(a->mode)) { | |
669 | result.mode = a->mode; | |
670 | hashcpy(result.sha, a->sha1); | |
671 | } else { | |
672 | result.mode = b->mode; | |
673 | hashcpy(result.sha, b->sha1); | |
674 | } | |
675 | } else { | |
b7fa51da | 676 | if (!sha_eq(a->sha1, one->sha1) && !sha_eq(b->sha1, one->sha1)) |
9047ebbc MV |
677 | result.merge = 1; |
678 | ||
679 | /* | |
680 | * Merge modes | |
681 | */ | |
b7fa51da | 682 | if (a->mode == b->mode || a->mode == one->mode) |
9047ebbc MV |
683 | result.mode = b->mode; |
684 | else { | |
685 | result.mode = a->mode; | |
b7fa51da | 686 | if (b->mode != one->mode) { |
9047ebbc MV |
687 | result.clean = 0; |
688 | result.merge = 1; | |
689 | } | |
690 | } | |
691 | ||
b7fa51da | 692 | if (sha_eq(a->sha1, b->sha1) || sha_eq(a->sha1, one->sha1)) |
9047ebbc | 693 | hashcpy(result.sha, b->sha1); |
b7fa51da | 694 | else if (sha_eq(b->sha1, one->sha1)) |
9047ebbc MV |
695 | hashcpy(result.sha, a->sha1); |
696 | else if (S_ISREG(a->mode)) { | |
697 | mmbuffer_t result_buf; | |
698 | int merge_status; | |
699 | ||
b7fa51da | 700 | merge_status = merge_3way(o, &result_buf, one, a, b, |
9047ebbc MV |
701 | branch1, branch2); |
702 | ||
703 | if ((merge_status < 0) || !result_buf.ptr) | |
704 | die("Failed to execute internal merge"); | |
705 | ||
706 | if (write_sha1_file(result_buf.ptr, result_buf.size, | |
707 | blob_type, result.sha)) | |
708 | die("Unable to add %s to database", | |
709 | a->path); | |
710 | ||
711 | free(result_buf.ptr); | |
712 | result.clean = (merge_status == 0); | |
713 | } else if (S_ISGITLINK(a->mode)) { | |
714 | result.clean = 0; | |
715 | hashcpy(result.sha, a->sha1); | |
716 | } else if (S_ISLNK(a->mode)) { | |
717 | hashcpy(result.sha, a->sha1); | |
718 | ||
719 | if (!sha_eq(a->sha1, b->sha1)) | |
720 | result.clean = 0; | |
721 | } else { | |
722 | die("unsupported object type in the tree"); | |
723 | } | |
724 | } | |
725 | ||
726 | return result; | |
727 | } | |
728 | ||
8a2fce18 MV |
729 | static void conflict_rename_rename(struct merge_options *o, |
730 | struct rename *ren1, | |
9047ebbc MV |
731 | const char *branch1, |
732 | struct rename *ren2, | |
733 | const char *branch2) | |
734 | { | |
735 | char *del[2]; | |
736 | int delp = 0; | |
737 | const char *ren1_dst = ren1->pair->two->path; | |
738 | const char *ren2_dst = ren2->pair->two->path; | |
739 | const char *dst_name1 = ren1_dst; | |
740 | const char *dst_name2 = ren2_dst; | |
696ee23c MV |
741 | if (string_list_has_string(&o->current_directory_set, ren1_dst)) { |
742 | dst_name1 = del[delp++] = unique_path(o, ren1_dst, branch1); | |
8a2fce18 | 743 | output(o, 1, "%s is a directory in %s adding as %s instead", |
9047ebbc | 744 | ren1_dst, branch2, dst_name1); |
b7fa51da | 745 | remove_file(o, 0, ren1_dst, 0); |
9047ebbc | 746 | } |
696ee23c MV |
747 | if (string_list_has_string(&o->current_directory_set, ren2_dst)) { |
748 | dst_name2 = del[delp++] = unique_path(o, ren2_dst, branch2); | |
8a2fce18 | 749 | output(o, 1, "%s is a directory in %s adding as %s instead", |
9047ebbc | 750 | ren2_dst, branch1, dst_name2); |
b7fa51da | 751 | remove_file(o, 0, ren2_dst, 0); |
9047ebbc | 752 | } |
b7fa51da | 753 | if (o->call_depth) { |
9047ebbc MV |
754 | remove_file_from_cache(dst_name1); |
755 | remove_file_from_cache(dst_name2); | |
756 | /* | |
757 | * Uncomment to leave the conflicting names in the resulting tree | |
758 | * | |
b7fa51da MV |
759 | * update_file(o, 0, ren1->pair->two->sha1, ren1->pair->two->mode, dst_name1); |
760 | * update_file(o, 0, ren2->pair->two->sha1, ren2->pair->two->mode, dst_name2); | |
9047ebbc MV |
761 | */ |
762 | } else { | |
763 | update_stages(dst_name1, NULL, ren1->pair->two, NULL, 1); | |
764 | update_stages(dst_name2, NULL, NULL, ren2->pair->two, 1); | |
765 | } | |
766 | while (delp--) | |
767 | free(del[delp]); | |
768 | } | |
769 | ||
8a2fce18 MV |
770 | static void conflict_rename_dir(struct merge_options *o, |
771 | struct rename *ren1, | |
9047ebbc MV |
772 | const char *branch1) |
773 | { | |
696ee23c | 774 | char *new_path = unique_path(o, ren1->pair->two->path, branch1); |
8a2fce18 | 775 | output(o, 1, "Renaming %s to %s instead", ren1->pair->one->path, new_path); |
b7fa51da MV |
776 | remove_file(o, 0, ren1->pair->two->path, 0); |
777 | update_file(o, 0, ren1->pair->two->sha1, ren1->pair->two->mode, new_path); | |
9047ebbc MV |
778 | free(new_path); |
779 | } | |
780 | ||
8a2fce18 MV |
781 | static void conflict_rename_rename_2(struct merge_options *o, |
782 | struct rename *ren1, | |
9047ebbc MV |
783 | const char *branch1, |
784 | struct rename *ren2, | |
785 | const char *branch2) | |
786 | { | |
696ee23c MV |
787 | char *new_path1 = unique_path(o, ren1->pair->two->path, branch1); |
788 | char *new_path2 = unique_path(o, ren2->pair->two->path, branch2); | |
8a2fce18 | 789 | output(o, 1, "Renaming %s to %s and %s to %s instead", |
9047ebbc MV |
790 | ren1->pair->one->path, new_path1, |
791 | ren2->pair->one->path, new_path2); | |
b7fa51da MV |
792 | remove_file(o, 0, ren1->pair->two->path, 0); |
793 | update_file(o, 0, ren1->pair->two->sha1, ren1->pair->two->mode, new_path1); | |
794 | update_file(o, 0, ren2->pair->two->sha1, ren2->pair->two->mode, new_path2); | |
9047ebbc MV |
795 | free(new_path2); |
796 | free(new_path1); | |
797 | } | |
798 | ||
8a2fce18 MV |
799 | static int process_renames(struct merge_options *o, |
800 | struct string_list *a_renames, | |
801 | struct string_list *b_renames) | |
9047ebbc MV |
802 | { |
803 | int clean_merge = 1, i, j; | |
804 | struct string_list a_by_dst = {NULL, 0, 0, 0}, b_by_dst = {NULL, 0, 0, 0}; | |
805 | const struct rename *sre; | |
806 | ||
807 | for (i = 0; i < a_renames->nr; i++) { | |
808 | sre = a_renames->items[i].util; | |
809 | string_list_insert(sre->pair->two->path, &a_by_dst)->util | |
810 | = sre->dst_entry; | |
811 | } | |
812 | for (i = 0; i < b_renames->nr; i++) { | |
813 | sre = b_renames->items[i].util; | |
814 | string_list_insert(sre->pair->two->path, &b_by_dst)->util | |
815 | = sre->dst_entry; | |
816 | } | |
817 | ||
818 | for (i = 0, j = 0; i < a_renames->nr || j < b_renames->nr;) { | |
9047ebbc | 819 | char *src; |
8e24cbae | 820 | struct string_list *renames1, *renames2Dst; |
9047ebbc MV |
821 | struct rename *ren1 = NULL, *ren2 = NULL; |
822 | const char *branch1, *branch2; | |
823 | const char *ren1_src, *ren1_dst; | |
824 | ||
825 | if (i >= a_renames->nr) { | |
9047ebbc MV |
826 | ren2 = b_renames->items[j++].util; |
827 | } else if (j >= b_renames->nr) { | |
9047ebbc MV |
828 | ren1 = a_renames->items[i++].util; |
829 | } else { | |
8e24cbae BK |
830 | int compare = strcmp(a_renames->items[i].string, |
831 | b_renames->items[j].string); | |
9047ebbc MV |
832 | if (compare <= 0) |
833 | ren1 = a_renames->items[i++].util; | |
834 | if (compare >= 0) | |
835 | ren2 = b_renames->items[j++].util; | |
836 | } | |
837 | ||
838 | /* TODO: refactor, so that 1/2 are not needed */ | |
839 | if (ren1) { | |
840 | renames1 = a_renames; | |
9047ebbc | 841 | renames2Dst = &b_by_dst; |
8a2fce18 MV |
842 | branch1 = o->branch1; |
843 | branch2 = o->branch2; | |
9047ebbc MV |
844 | } else { |
845 | struct rename *tmp; | |
846 | renames1 = b_renames; | |
9047ebbc | 847 | renames2Dst = &a_by_dst; |
8a2fce18 MV |
848 | branch1 = o->branch2; |
849 | branch2 = o->branch1; | |
9047ebbc MV |
850 | tmp = ren2; |
851 | ren2 = ren1; | |
852 | ren1 = tmp; | |
853 | } | |
854 | src = ren1->pair->one->path; | |
855 | ||
856 | ren1->dst_entry->processed = 1; | |
857 | ren1->src_entry->processed = 1; | |
858 | ||
859 | if (ren1->processed) | |
860 | continue; | |
861 | ren1->processed = 1; | |
862 | ||
863 | ren1_src = ren1->pair->one->path; | |
864 | ren1_dst = ren1->pair->two->path; | |
865 | ||
866 | if (ren2) { | |
867 | const char *ren2_src = ren2->pair->one->path; | |
868 | const char *ren2_dst = ren2->pair->two->path; | |
869 | /* Renamed in 1 and renamed in 2 */ | |
870 | if (strcmp(ren1_src, ren2_src) != 0) | |
871 | die("ren1.src != ren2.src"); | |
872 | ren2->dst_entry->processed = 1; | |
873 | ren2->processed = 1; | |
874 | if (strcmp(ren1_dst, ren2_dst) != 0) { | |
875 | clean_merge = 0; | |
8a2fce18 | 876 | output(o, 1, "CONFLICT (rename/rename): " |
9047ebbc MV |
877 | "Rename \"%s\"->\"%s\" in branch \"%s\" " |
878 | "rename \"%s\"->\"%s\" in \"%s\"%s", | |
879 | src, ren1_dst, branch1, | |
880 | src, ren2_dst, branch2, | |
b7fa51da MV |
881 | o->call_depth ? " (left unresolved)": ""); |
882 | if (o->call_depth) { | |
9047ebbc | 883 | remove_file_from_cache(src); |
b7fa51da | 884 | update_file(o, 0, ren1->pair->one->sha1, |
9047ebbc MV |
885 | ren1->pair->one->mode, src); |
886 | } | |
8a2fce18 | 887 | conflict_rename_rename(o, ren1, branch1, ren2, branch2); |
9047ebbc MV |
888 | } else { |
889 | struct merge_file_info mfi; | |
b7fa51da MV |
890 | remove_file(o, 1, ren1_src, 1); |
891 | mfi = merge_file(o, | |
892 | ren1->pair->one, | |
9047ebbc MV |
893 | ren1->pair->two, |
894 | ren2->pair->two, | |
895 | branch1, | |
896 | branch2); | |
897 | if (mfi.merge || !mfi.clean) | |
8a2fce18 | 898 | output(o, 1, "Renaming %s->%s", src, ren1_dst); |
9047ebbc MV |
899 | |
900 | if (mfi.merge) | |
8a2fce18 | 901 | output(o, 2, "Auto-merging %s", ren1_dst); |
9047ebbc MV |
902 | |
903 | if (!mfi.clean) { | |
8a2fce18 | 904 | output(o, 1, "CONFLICT (content): merge conflict in %s", |
9047ebbc MV |
905 | ren1_dst); |
906 | clean_merge = 0; | |
907 | ||
b7fa51da | 908 | if (!o->call_depth) |
9047ebbc MV |
909 | update_stages(ren1_dst, |
910 | ren1->pair->one, | |
911 | ren1->pair->two, | |
912 | ren2->pair->two, | |
913 | 1 /* clear */); | |
914 | } | |
b7fa51da | 915 | update_file(o, mfi.clean, mfi.sha, mfi.mode, ren1_dst); |
9047ebbc MV |
916 | } |
917 | } else { | |
918 | /* Renamed in 1, maybe changed in 2 */ | |
919 | struct string_list_item *item; | |
920 | /* we only use sha1 and mode of these */ | |
921 | struct diff_filespec src_other, dst_other; | |
922 | int try_merge, stage = a_renames == renames1 ? 3: 2; | |
923 | ||
b7fa51da | 924 | remove_file(o, 1, ren1_src, o->call_depth || stage == 3); |
9047ebbc MV |
925 | |
926 | hashcpy(src_other.sha1, ren1->src_entry->stages[stage].sha); | |
927 | src_other.mode = ren1->src_entry->stages[stage].mode; | |
928 | hashcpy(dst_other.sha1, ren1->dst_entry->stages[stage].sha); | |
929 | dst_other.mode = ren1->dst_entry->stages[stage].mode; | |
930 | ||
931 | try_merge = 0; | |
932 | ||
696ee23c | 933 | if (string_list_has_string(&o->current_directory_set, ren1_dst)) { |
9047ebbc | 934 | clean_merge = 0; |
8a2fce18 | 935 | output(o, 1, "CONFLICT (rename/directory): Rename %s->%s in %s " |
9047ebbc MV |
936 | " directory %s added in %s", |
937 | ren1_src, ren1_dst, branch1, | |
938 | ren1_dst, branch2); | |
8a2fce18 | 939 | conflict_rename_dir(o, ren1, branch1); |
9047ebbc MV |
940 | } else if (sha_eq(src_other.sha1, null_sha1)) { |
941 | clean_merge = 0; | |
8a2fce18 | 942 | output(o, 1, "CONFLICT (rename/delete): Rename %s->%s in %s " |
9047ebbc MV |
943 | "and deleted in %s", |
944 | ren1_src, ren1_dst, branch1, | |
945 | branch2); | |
b7fa51da | 946 | update_file(o, 0, ren1->pair->two->sha1, ren1->pair->two->mode, ren1_dst); |
bf74106a DO |
947 | if (!o->call_depth) |
948 | update_stages(ren1_dst, NULL, | |
949 | branch1 == o->branch1 ? | |
950 | ren1->pair->two : NULL, | |
951 | branch1 == o->branch1 ? | |
952 | NULL : ren1->pair->two, 1); | |
9047ebbc MV |
953 | } else if (!sha_eq(dst_other.sha1, null_sha1)) { |
954 | const char *new_path; | |
955 | clean_merge = 0; | |
956 | try_merge = 1; | |
8a2fce18 | 957 | output(o, 1, "CONFLICT (rename/add): Rename %s->%s in %s. " |
9047ebbc MV |
958 | "%s added in %s", |
959 | ren1_src, ren1_dst, branch1, | |
960 | ren1_dst, branch2); | |
c94736a2 JH |
961 | if (o->call_depth) { |
962 | struct merge_file_info mfi; | |
963 | struct diff_filespec one, a, b; | |
964 | ||
965 | one.path = a.path = b.path = | |
966 | (char *)ren1_dst; | |
967 | hashcpy(one.sha1, null_sha1); | |
968 | one.mode = 0; | |
969 | hashcpy(a.sha1, ren1->pair->two->sha1); | |
970 | a.mode = ren1->pair->two->mode; | |
971 | hashcpy(b.sha1, dst_other.sha1); | |
972 | b.mode = dst_other.mode; | |
973 | mfi = merge_file(o, &one, &a, &b, | |
974 | branch1, | |
975 | branch2); | |
976 | output(o, 1, "Adding merged %s", ren1_dst); | |
977 | update_file(o, 0, | |
978 | mfi.sha, | |
979 | mfi.mode, | |
980 | ren1_dst); | |
981 | } else { | |
982 | new_path = unique_path(o, ren1_dst, branch2); | |
983 | output(o, 1, "Adding as %s instead", new_path); | |
984 | update_file(o, 0, dst_other.sha1, dst_other.mode, new_path); | |
985 | } | |
9047ebbc MV |
986 | } else if ((item = string_list_lookup(ren1_dst, renames2Dst))) { |
987 | ren2 = item->util; | |
988 | clean_merge = 0; | |
989 | ren2->processed = 1; | |
8a2fce18 MV |
990 | output(o, 1, "CONFLICT (rename/rename): " |
991 | "Rename %s->%s in %s. " | |
9047ebbc MV |
992 | "Rename %s->%s in %s", |
993 | ren1_src, ren1_dst, branch1, | |
994 | ren2->pair->one->path, ren2->pair->two->path, branch2); | |
8a2fce18 | 995 | conflict_rename_rename_2(o, ren1, branch1, ren2, branch2); |
9047ebbc MV |
996 | } else |
997 | try_merge = 1; | |
998 | ||
999 | if (try_merge) { | |
8a2fce18 | 1000 | struct diff_filespec *one, *a, *b; |
9047ebbc MV |
1001 | struct merge_file_info mfi; |
1002 | src_other.path = (char *)ren1_src; | |
1003 | ||
8a2fce18 | 1004 | one = ren1->pair->one; |
9047ebbc MV |
1005 | if (a_renames == renames1) { |
1006 | a = ren1->pair->two; | |
1007 | b = &src_other; | |
1008 | } else { | |
1009 | b = ren1->pair->two; | |
1010 | a = &src_other; | |
1011 | } | |
b7fa51da | 1012 | mfi = merge_file(o, one, a, b, |
8a2fce18 | 1013 | o->branch1, o->branch2); |
9047ebbc MV |
1014 | |
1015 | if (mfi.clean && | |
1016 | sha_eq(mfi.sha, ren1->pair->two->sha1) && | |
1017 | mfi.mode == ren1->pair->two->mode) | |
1018 | /* | |
1019 | * This messaged is part of | |
1020 | * t6022 test. If you change | |
1021 | * it update the test too. | |
1022 | */ | |
8a2fce18 | 1023 | output(o, 3, "Skipped %s (merged same as existing)", ren1_dst); |
9047ebbc MV |
1024 | else { |
1025 | if (mfi.merge || !mfi.clean) | |
8a2fce18 | 1026 | output(o, 1, "Renaming %s => %s", ren1_src, ren1_dst); |
9047ebbc | 1027 | if (mfi.merge) |
8a2fce18 | 1028 | output(o, 2, "Auto-merging %s", ren1_dst); |
9047ebbc | 1029 | if (!mfi.clean) { |
8a2fce18 | 1030 | output(o, 1, "CONFLICT (rename/modify): Merge conflict in %s", |
9047ebbc MV |
1031 | ren1_dst); |
1032 | clean_merge = 0; | |
1033 | ||
b7fa51da | 1034 | if (!o->call_depth) |
9047ebbc | 1035 | update_stages(ren1_dst, |
8a2fce18 | 1036 | one, a, b, 1); |
9047ebbc | 1037 | } |
b7fa51da | 1038 | update_file(o, mfi.clean, mfi.sha, mfi.mode, ren1_dst); |
9047ebbc MV |
1039 | } |
1040 | } | |
1041 | } | |
1042 | } | |
1043 | string_list_clear(&a_by_dst, 0); | |
1044 | string_list_clear(&b_by_dst, 0); | |
1045 | ||
1046 | return clean_merge; | |
1047 | } | |
1048 | ||
1049 | static unsigned char *stage_sha(const unsigned char *sha, unsigned mode) | |
1050 | { | |
1051 | return (is_null_sha1(sha) || mode == 0) ? NULL: (unsigned char *)sha; | |
1052 | } | |
1053 | ||
1054 | /* Per entry merge function */ | |
8a2fce18 MV |
1055 | static int process_entry(struct merge_options *o, |
1056 | const char *path, struct stage_data *entry) | |
9047ebbc MV |
1057 | { |
1058 | /* | |
1059 | printf("processing entry, clean cache: %s\n", index_only ? "yes": "no"); | |
1060 | print_index_entry("\tpath: ", entry); | |
1061 | */ | |
1062 | int clean_merge = 1; | |
1063 | unsigned o_mode = entry->stages[1].mode; | |
1064 | unsigned a_mode = entry->stages[2].mode; | |
1065 | unsigned b_mode = entry->stages[3].mode; | |
1066 | unsigned char *o_sha = stage_sha(entry->stages[1].sha, o_mode); | |
1067 | unsigned char *a_sha = stage_sha(entry->stages[2].sha, a_mode); | |
1068 | unsigned char *b_sha = stage_sha(entry->stages[3].sha, b_mode); | |
1069 | ||
1070 | if (o_sha && (!a_sha || !b_sha)) { | |
1071 | /* Case A: Deleted in one */ | |
1072 | if ((!a_sha && !b_sha) || | |
1073 | (sha_eq(a_sha, o_sha) && !b_sha) || | |
1074 | (!a_sha && sha_eq(b_sha, o_sha))) { | |
1075 | /* Deleted in both or deleted in one and | |
1076 | * unchanged in the other */ | |
1077 | if (a_sha) | |
8a2fce18 | 1078 | output(o, 2, "Removing %s", path); |
9047ebbc | 1079 | /* do not touch working file if it did not exist */ |
b7fa51da | 1080 | remove_file(o, 1, path, !a_sha); |
9047ebbc MV |
1081 | } else { |
1082 | /* Deleted in one and changed in the other */ | |
1083 | clean_merge = 0; | |
1084 | if (!a_sha) { | |
8a2fce18 | 1085 | output(o, 1, "CONFLICT (delete/modify): %s deleted in %s " |
9047ebbc | 1086 | "and modified in %s. Version %s of %s left in tree.", |
8a2fce18 MV |
1087 | path, o->branch1, |
1088 | o->branch2, o->branch2, path); | |
b7fa51da | 1089 | update_file(o, 0, b_sha, b_mode, path); |
9047ebbc | 1090 | } else { |
8a2fce18 | 1091 | output(o, 1, "CONFLICT (delete/modify): %s deleted in %s " |
9047ebbc | 1092 | "and modified in %s. Version %s of %s left in tree.", |
8a2fce18 MV |
1093 | path, o->branch2, |
1094 | o->branch1, o->branch1, path); | |
b7fa51da | 1095 | update_file(o, 0, a_sha, a_mode, path); |
9047ebbc MV |
1096 | } |
1097 | } | |
1098 | ||
1099 | } else if ((!o_sha && a_sha && !b_sha) || | |
1100 | (!o_sha && !a_sha && b_sha)) { | |
1101 | /* Case B: Added in one. */ | |
1102 | const char *add_branch; | |
1103 | const char *other_branch; | |
1104 | unsigned mode; | |
1105 | const unsigned char *sha; | |
1106 | const char *conf; | |
1107 | ||
1108 | if (a_sha) { | |
8a2fce18 MV |
1109 | add_branch = o->branch1; |
1110 | other_branch = o->branch2; | |
9047ebbc MV |
1111 | mode = a_mode; |
1112 | sha = a_sha; | |
1113 | conf = "file/directory"; | |
1114 | } else { | |
8a2fce18 MV |
1115 | add_branch = o->branch2; |
1116 | other_branch = o->branch1; | |
9047ebbc MV |
1117 | mode = b_mode; |
1118 | sha = b_sha; | |
1119 | conf = "directory/file"; | |
1120 | } | |
696ee23c MV |
1121 | if (string_list_has_string(&o->current_directory_set, path)) { |
1122 | const char *new_path = unique_path(o, path, add_branch); | |
9047ebbc | 1123 | clean_merge = 0; |
8a2fce18 | 1124 | output(o, 1, "CONFLICT (%s): There is a directory with name %s in %s. " |
9047ebbc MV |
1125 | "Adding %s as %s", |
1126 | conf, path, other_branch, path, new_path); | |
b7fa51da MV |
1127 | remove_file(o, 0, path, 0); |
1128 | update_file(o, 0, sha, mode, new_path); | |
9047ebbc | 1129 | } else { |
8a2fce18 | 1130 | output(o, 2, "Adding %s", path); |
b7fa51da | 1131 | update_file(o, 1, sha, mode, path); |
9047ebbc MV |
1132 | } |
1133 | } else if (a_sha && b_sha) { | |
1134 | /* Case C: Added in both (check for same permissions) and */ | |
1135 | /* case D: Modified in both, but differently. */ | |
1136 | const char *reason = "content"; | |
1137 | struct merge_file_info mfi; | |
8a2fce18 | 1138 | struct diff_filespec one, a, b; |
9047ebbc MV |
1139 | |
1140 | if (!o_sha) { | |
1141 | reason = "add/add"; | |
1142 | o_sha = (unsigned char *)null_sha1; | |
1143 | } | |
8a2fce18 MV |
1144 | output(o, 2, "Auto-merging %s", path); |
1145 | one.path = a.path = b.path = (char *)path; | |
1146 | hashcpy(one.sha1, o_sha); | |
1147 | one.mode = o_mode; | |
9047ebbc MV |
1148 | hashcpy(a.sha1, a_sha); |
1149 | a.mode = a_mode; | |
1150 | hashcpy(b.sha1, b_sha); | |
1151 | b.mode = b_mode; | |
1152 | ||
b7fa51da | 1153 | mfi = merge_file(o, &one, &a, &b, |
8a2fce18 | 1154 | o->branch1, o->branch2); |
9047ebbc MV |
1155 | |
1156 | clean_merge = mfi.clean; | |
39d8e271 CB |
1157 | if (!mfi.clean) { |
1158 | if (S_ISGITLINK(mfi.mode)) | |
1159 | reason = "submodule"; | |
8a2fce18 | 1160 | output(o, 1, "CONFLICT (%s): Merge conflict in %s", |
9047ebbc | 1161 | reason, path); |
9047ebbc | 1162 | } |
39d8e271 | 1163 | update_file(o, mfi.clean, mfi.sha, mfi.mode, path); |
9047ebbc MV |
1164 | } else if (!o_sha && !a_sha && !b_sha) { |
1165 | /* | |
1166 | * this entry was deleted altogether. a_mode == 0 means | |
1167 | * we had that path and want to actively remove it. | |
1168 | */ | |
b7fa51da | 1169 | remove_file(o, 1, path, !a_mode); |
9047ebbc MV |
1170 | } else |
1171 | die("Fatal merge failure, shouldn't happen."); | |
1172 | ||
1173 | return clean_merge; | |
1174 | } | |
1175 | ||
264b774b MM |
1176 | struct unpack_trees_error_msgs get_porcelain_error_msgs(void) |
1177 | { | |
1178 | struct unpack_trees_error_msgs msgs = { | |
1179 | /* would_overwrite */ | |
1180 | "Your local changes to '%s' would be overwritten by merge. Aborting.", | |
1181 | /* not_uptodate_file */ | |
1182 | "Your local changes to '%s' would be overwritten by merge. Aborting.", | |
1183 | /* not_uptodate_dir */ | |
1184 | "Updating '%s' would lose untracked files in it. Aborting.", | |
1185 | /* would_lose_untracked */ | |
1186 | "Untracked working tree file '%s' would be %s by merge. Aborting", | |
1187 | /* bind_overlap -- will not happen here */ | |
1188 | NULL, | |
1189 | }; | |
045c0504 JH |
1190 | if (advice_commit_before_merge) { |
1191 | msgs.would_overwrite = msgs.not_uptodate_file = | |
1192 | "Your local changes to '%s' would be overwritten by merge. Aborting.\n" | |
1193 | "Please, commit your changes or stash them before you can merge."; | |
1194 | } | |
264b774b MM |
1195 | return msgs; |
1196 | } | |
1197 | ||
8a2fce18 MV |
1198 | int merge_trees(struct merge_options *o, |
1199 | struct tree *head, | |
9047ebbc MV |
1200 | struct tree *merge, |
1201 | struct tree *common, | |
9047ebbc MV |
1202 | struct tree **result) |
1203 | { | |
1204 | int code, clean; | |
1205 | ||
85e51b78 JH |
1206 | if (o->subtree_shift) { |
1207 | merge = shift_tree_object(head, merge, o->subtree_shift); | |
1208 | common = shift_tree_object(head, common, o->subtree_shift); | |
9047ebbc MV |
1209 | } |
1210 | ||
1211 | if (sha_eq(common->object.sha1, merge->object.sha1)) { | |
8a2fce18 | 1212 | output(o, 0, "Already uptodate!"); |
9047ebbc MV |
1213 | *result = head; |
1214 | return 1; | |
1215 | } | |
1216 | ||
b7fa51da | 1217 | code = git_merge_trees(o->call_depth, common, head, merge); |
9047ebbc | 1218 | |
fadd069d JH |
1219 | if (code != 0) { |
1220 | if (show(o, 4) || o->call_depth) | |
1221 | die("merging of trees %s and %s failed", | |
1222 | sha1_to_hex(head->object.sha1), | |
1223 | sha1_to_hex(merge->object.sha1)); | |
1224 | else | |
1225 | exit(128); | |
1226 | } | |
9047ebbc MV |
1227 | |
1228 | if (unmerged_cache()) { | |
1229 | struct string_list *entries, *re_head, *re_merge; | |
1230 | int i; | |
696ee23c MV |
1231 | string_list_clear(&o->current_file_set, 1); |
1232 | string_list_clear(&o->current_directory_set, 1); | |
1233 | get_files_dirs(o, head); | |
1234 | get_files_dirs(o, merge); | |
9047ebbc MV |
1235 | |
1236 | entries = get_unmerged(); | |
8a2fce18 MV |
1237 | re_head = get_renames(o, head, common, head, merge, entries); |
1238 | re_merge = get_renames(o, merge, common, head, merge, entries); | |
1239 | clean = process_renames(o, re_head, re_merge); | |
9047ebbc MV |
1240 | for (i = 0; i < entries->nr; i++) { |
1241 | const char *path = entries->items[i].string; | |
1242 | struct stage_data *e = entries->items[i].util; | |
1243 | if (!e->processed | |
8a2fce18 | 1244 | && !process_entry(o, path, e)) |
9047ebbc MV |
1245 | clean = 0; |
1246 | } | |
1247 | ||
1248 | string_list_clear(re_merge, 0); | |
1249 | string_list_clear(re_head, 0); | |
1250 | string_list_clear(entries, 1); | |
1251 | ||
1252 | } | |
1253 | else | |
1254 | clean = 1; | |
1255 | ||
b7fa51da | 1256 | if (o->call_depth) |
8a2fce18 | 1257 | *result = write_tree_from_memory(o); |
9047ebbc MV |
1258 | |
1259 | return clean; | |
1260 | } | |
1261 | ||
1262 | static struct commit_list *reverse_commit_list(struct commit_list *list) | |
1263 | { | |
1264 | struct commit_list *next = NULL, *current, *backup; | |
1265 | for (current = list; current; current = backup) { | |
1266 | backup = current->next; | |
1267 | current->next = next; | |
1268 | next = current; | |
1269 | } | |
1270 | return next; | |
1271 | } | |
1272 | ||
1273 | /* | |
1274 | * Merge the commits h1 and h2, return the resulting virtual | |
1275 | * commit object and a flag indicating the cleanness of the merge. | |
1276 | */ | |
8a2fce18 MV |
1277 | int merge_recursive(struct merge_options *o, |
1278 | struct commit *h1, | |
9047ebbc | 1279 | struct commit *h2, |
9047ebbc MV |
1280 | struct commit_list *ca, |
1281 | struct commit **result) | |
1282 | { | |
1283 | struct commit_list *iter; | |
1284 | struct commit *merged_common_ancestors; | |
1285 | struct tree *mrtree = mrtree; | |
1286 | int clean; | |
1287 | ||
8a2fce18 MV |
1288 | if (show(o, 4)) { |
1289 | output(o, 4, "Merging:"); | |
5033639c MV |
1290 | output_commit_title(o, h1); |
1291 | output_commit_title(o, h2); | |
9047ebbc MV |
1292 | } |
1293 | ||
1294 | if (!ca) { | |
1295 | ca = get_merge_bases(h1, h2, 1); | |
1296 | ca = reverse_commit_list(ca); | |
1297 | } | |
1298 | ||
8a2fce18 MV |
1299 | if (show(o, 5)) { |
1300 | output(o, 5, "found %u common ancestor(s):", commit_list_count(ca)); | |
9047ebbc | 1301 | for (iter = ca; iter; iter = iter->next) |
5033639c | 1302 | output_commit_title(o, iter->item); |
9047ebbc MV |
1303 | } |
1304 | ||
1305 | merged_common_ancestors = pop_commit(&ca); | |
1306 | if (merged_common_ancestors == NULL) { | |
1307 | /* if there is no common ancestor, make an empty tree */ | |
1308 | struct tree *tree = xcalloc(1, sizeof(struct tree)); | |
1309 | ||
1310 | tree->object.parsed = 1; | |
1311 | tree->object.type = OBJ_TREE; | |
1312 | pretend_sha1_file(NULL, 0, OBJ_TREE, tree->object.sha1); | |
1313 | merged_common_ancestors = make_virtual_commit(tree, "ancestor"); | |
1314 | } | |
1315 | ||
1316 | for (iter = ca; iter; iter = iter->next) { | |
8a2fce18 | 1317 | const char *saved_b1, *saved_b2; |
5033639c | 1318 | o->call_depth++; |
9047ebbc MV |
1319 | /* |
1320 | * When the merge fails, the result contains files | |
1321 | * with conflict markers. The cleanness flag is | |
1322 | * ignored, it was never actually used, as result of | |
1323 | * merge_trees has always overwritten it: the committed | |
1324 | * "conflicts" were already resolved. | |
1325 | */ | |
1326 | discard_cache(); | |
8a2fce18 MV |
1327 | saved_b1 = o->branch1; |
1328 | saved_b2 = o->branch2; | |
1329 | o->branch1 = "Temporary merge branch 1"; | |
1330 | o->branch2 = "Temporary merge branch 2"; | |
1331 | merge_recursive(o, merged_common_ancestors, iter->item, | |
1332 | NULL, &merged_common_ancestors); | |
1333 | o->branch1 = saved_b1; | |
1334 | o->branch2 = saved_b2; | |
5033639c | 1335 | o->call_depth--; |
9047ebbc MV |
1336 | |
1337 | if (!merged_common_ancestors) | |
1338 | die("merge returned no commit"); | |
1339 | } | |
1340 | ||
1341 | discard_cache(); | |
b7fa51da | 1342 | if (!o->call_depth) |
9047ebbc | 1343 | read_cache(); |
9047ebbc | 1344 | |
8a2fce18 MV |
1345 | clean = merge_trees(o, h1->tree, h2->tree, merged_common_ancestors->tree, |
1346 | &mrtree); | |
9047ebbc | 1347 | |
b7fa51da | 1348 | if (o->call_depth) { |
9047ebbc MV |
1349 | *result = make_virtual_commit(mrtree, "merged tree"); |
1350 | commit_list_insert(h1, &(*result)->parents); | |
1351 | commit_list_insert(h2, &(*result)->parents->next); | |
1352 | } | |
c7d84924 | 1353 | flush_output(o); |
9047ebbc MV |
1354 | return clean; |
1355 | } | |
1356 | ||
73118f89 SB |
1357 | static struct commit *get_ref(const unsigned char *sha1, const char *name) |
1358 | { | |
1359 | struct object *object; | |
1360 | ||
1361 | object = deref_tag(parse_object(sha1), name, strlen(name)); | |
1362 | if (!object) | |
1363 | return NULL; | |
1364 | if (object->type == OBJ_TREE) | |
1365 | return make_virtual_commit((struct tree*)object, name); | |
1366 | if (object->type != OBJ_COMMIT) | |
1367 | return NULL; | |
1368 | if (parse_commit((struct commit *)object)) | |
1369 | return NULL; | |
1370 | return (struct commit *)object; | |
1371 | } | |
1372 | ||
8a2fce18 MV |
1373 | int merge_recursive_generic(struct merge_options *o, |
1374 | const unsigned char *head, | |
1375 | const unsigned char *merge, | |
1376 | int num_base_list, | |
1377 | const unsigned char **base_list, | |
1378 | struct commit **result) | |
73118f89 SB |
1379 | { |
1380 | int clean, index_fd; | |
1381 | struct lock_file *lock = xcalloc(1, sizeof(struct lock_file)); | |
8a2fce18 MV |
1382 | struct commit *head_commit = get_ref(head, o->branch1); |
1383 | struct commit *next_commit = get_ref(merge, o->branch2); | |
73118f89 SB |
1384 | struct commit_list *ca = NULL; |
1385 | ||
1386 | if (base_list) { | |
1387 | int i; | |
8a2fce18 | 1388 | for (i = 0; i < num_base_list; ++i) { |
73118f89 | 1389 | struct commit *base; |
8a2fce18 | 1390 | if (!(base = get_ref(base_list[i], sha1_to_hex(base_list[i])))) |
73118f89 | 1391 | return error("Could not parse object '%s'", |
8a2fce18 | 1392 | sha1_to_hex(base_list[i])); |
73118f89 SB |
1393 | commit_list_insert(base, &ca); |
1394 | } | |
1395 | } | |
1396 | ||
1397 | index_fd = hold_locked_index(lock, 1); | |
8a2fce18 MV |
1398 | clean = merge_recursive(o, head_commit, next_commit, ca, |
1399 | result); | |
73118f89 SB |
1400 | if (active_cache_changed && |
1401 | (write_cache(index_fd, active_cache, active_nr) || | |
1402 | commit_locked_index(lock))) | |
1403 | return error("Unable to write index."); | |
1404 | ||
1405 | return clean ? 0 : 1; | |
1406 | } | |
1407 | ||
8a2fce18 | 1408 | static int merge_recursive_config(const char *var, const char *value, void *cb) |
9047ebbc | 1409 | { |
8a2fce18 | 1410 | struct merge_options *o = cb; |
9047ebbc | 1411 | if (!strcasecmp(var, "merge.verbosity")) { |
8a2fce18 | 1412 | o->verbosity = git_config_int(var, value); |
9047ebbc MV |
1413 | return 0; |
1414 | } | |
1415 | if (!strcasecmp(var, "diff.renamelimit")) { | |
8a2fce18 | 1416 | o->diff_rename_limit = git_config_int(var, value); |
9047ebbc MV |
1417 | return 0; |
1418 | } | |
1419 | if (!strcasecmp(var, "merge.renamelimit")) { | |
8a2fce18 | 1420 | o->merge_rename_limit = git_config_int(var, value); |
9047ebbc MV |
1421 | return 0; |
1422 | } | |
e137a892 | 1423 | return git_xmerge_config(var, value, cb); |
9047ebbc MV |
1424 | } |
1425 | ||
8a2fce18 | 1426 | void init_merge_options(struct merge_options *o) |
9047ebbc | 1427 | { |
8a2fce18 MV |
1428 | memset(o, 0, sizeof(struct merge_options)); |
1429 | o->verbosity = 2; | |
1430 | o->buffer_output = 1; | |
1431 | o->diff_rename_limit = -1; | |
1432 | o->merge_rename_limit = -1; | |
1433 | git_config(merge_recursive_config, o); | |
9047ebbc | 1434 | if (getenv("GIT_MERGE_VERBOSITY")) |
8a2fce18 | 1435 | o->verbosity = |
9047ebbc | 1436 | strtol(getenv("GIT_MERGE_VERBOSITY"), NULL, 10); |
8a2fce18 MV |
1437 | if (o->verbosity >= 5) |
1438 | o->buffer_output = 0; | |
c7d84924 | 1439 | strbuf_init(&o->obuf, 0); |
696ee23c MV |
1440 | memset(&o->current_file_set, 0, sizeof(struct string_list)); |
1441 | o->current_file_set.strdup_strings = 1; | |
1442 | memset(&o->current_directory_set, 0, sizeof(struct string_list)); | |
1443 | o->current_directory_set.strdup_strings = 1; | |
9047ebbc | 1444 | } |