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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" | |
7 | #include "cache-tree.h" | |
8 | #include "commit.h" | |
9 | #include "blob.h" | |
10 | #include "builtin.h" | |
11 | #include "tree-walk.h" | |
12 | #include "diff.h" | |
13 | #include "diffcore.h" | |
14 | #include "tag.h" | |
15 | #include "unpack-trees.h" | |
16 | #include "string-list.h" | |
17 | #include "xdiff-interface.h" | |
18 | #include "ll-merge.h" | |
19 | #include "interpolate.h" | |
20 | #include "attr.h" | |
21 | #include "merge-recursive.h" | |
9800c0df | 22 | #include "dir.h" |
9047ebbc | 23 | |
9047ebbc MV |
24 | static struct tree *shift_tree_object(struct tree *one, struct tree *two) |
25 | { | |
26 | unsigned char shifted[20]; | |
27 | ||
28 | /* | |
29 | * NEEDSWORK: this limits the recursion depth to hardcoded | |
30 | * value '2' to avoid excessive overhead. | |
31 | */ | |
32 | shift_tree(one->object.sha1, two->object.sha1, shifted, 2); | |
33 | if (!hashcmp(two->object.sha1, shifted)) | |
34 | return two; | |
35 | return lookup_tree(shifted); | |
36 | } | |
37 | ||
38 | /* | |
a6f63ae0 | 39 | * A virtual commit has (const char *)commit->util set to the name. |
9047ebbc MV |
40 | */ |
41 | ||
42 | struct commit *make_virtual_commit(struct tree *tree, const char *comment) | |
43 | { | |
44 | struct commit *commit = xcalloc(1, sizeof(struct commit)); | |
9047ebbc MV |
45 | commit->tree = tree; |
46 | commit->util = (void*)comment; | |
9047ebbc MV |
47 | /* avoid warnings */ |
48 | commit->object.parsed = 1; | |
49 | return commit; | |
50 | } | |
51 | ||
52 | /* | |
53 | * Since we use get_tree_entry(), which does not put the read object into | |
54 | * the object pool, we cannot rely on a == b. | |
55 | */ | |
56 | static int sha_eq(const unsigned char *a, const unsigned char *b) | |
57 | { | |
58 | if (!a && !b) | |
59 | return 2; | |
60 | return a && b && hashcmp(a, b) == 0; | |
61 | } | |
62 | ||
63 | /* | |
64 | * Since we want to write the index eventually, we cannot reuse the index | |
65 | * for these (temporary) data. | |
66 | */ | |
67 | struct stage_data | |
68 | { | |
69 | struct | |
70 | { | |
71 | unsigned mode; | |
72 | unsigned char sha[20]; | |
73 | } stages[4]; | |
74 | unsigned processed:1; | |
75 | }; | |
76 | ||
8a2fce18 | 77 | static int show(struct merge_options *o, int v) |
9047ebbc | 78 | { |
5033639c | 79 | return (!o->call_depth && o->verbosity >= v) || o->verbosity >= 5; |
9047ebbc MV |
80 | } |
81 | ||
c7d84924 | 82 | static void flush_output(struct merge_options *o) |
9047ebbc | 83 | { |
c7d84924 MV |
84 | if (o->obuf.len) { |
85 | fputs(o->obuf.buf, stdout); | |
86 | strbuf_reset(&o->obuf); | |
9047ebbc MV |
87 | } |
88 | } | |
89 | ||
8a2fce18 | 90 | static void output(struct merge_options *o, int v, const char *fmt, ...) |
9047ebbc MV |
91 | { |
92 | int len; | |
93 | va_list ap; | |
94 | ||
8a2fce18 | 95 | if (!show(o, v)) |
9047ebbc MV |
96 | return; |
97 | ||
c7d84924 MV |
98 | strbuf_grow(&o->obuf, o->call_depth * 2 + 2); |
99 | memset(o->obuf.buf + o->obuf.len, ' ', o->call_depth * 2); | |
100 | strbuf_setlen(&o->obuf, o->obuf.len + o->call_depth * 2); | |
9047ebbc MV |
101 | |
102 | va_start(ap, fmt); | |
c7d84924 | 103 | len = vsnprintf(o->obuf.buf + o->obuf.len, strbuf_avail(&o->obuf), fmt, ap); |
9047ebbc MV |
104 | va_end(ap); |
105 | ||
106 | if (len < 0) | |
107 | len = 0; | |
c7d84924 MV |
108 | if (len >= strbuf_avail(&o->obuf)) { |
109 | strbuf_grow(&o->obuf, len + 2); | |
9047ebbc | 110 | va_start(ap, fmt); |
c7d84924 | 111 | len = vsnprintf(o->obuf.buf + o->obuf.len, strbuf_avail(&o->obuf), fmt, ap); |
9047ebbc | 112 | va_end(ap); |
c7d84924 | 113 | if (len >= strbuf_avail(&o->obuf)) { |
9047ebbc MV |
114 | die("this should not happen, your snprintf is broken"); |
115 | } | |
116 | } | |
c7d84924 MV |
117 | strbuf_setlen(&o->obuf, o->obuf.len + len); |
118 | strbuf_add(&o->obuf, "\n", 1); | |
8a2fce18 | 119 | if (!o->buffer_output) |
c7d84924 | 120 | flush_output(o); |
9047ebbc MV |
121 | } |
122 | ||
5033639c | 123 | static void output_commit_title(struct merge_options *o, struct commit *commit) |
9047ebbc MV |
124 | { |
125 | int i; | |
c7d84924 | 126 | flush_output(o); |
5033639c | 127 | for (i = o->call_depth; i--;) |
9047ebbc MV |
128 | fputs(" ", stdout); |
129 | if (commit->util) | |
130 | printf("virtual %s\n", (char *)commit->util); | |
131 | else { | |
132 | printf("%s ", find_unique_abbrev(commit->object.sha1, DEFAULT_ABBREV)); | |
133 | if (parse_commit(commit) != 0) | |
134 | printf("(bad commit)\n"); | |
135 | else { | |
136 | const char *s; | |
137 | int len; | |
138 | for (s = commit->buffer; *s; s++) | |
139 | if (*s == '\n' && s[1] == '\n') { | |
140 | s += 2; | |
141 | break; | |
142 | } | |
143 | for (len = 0; s[len] && '\n' != s[len]; len++) | |
144 | ; /* do nothing */ | |
145 | printf("%.*s\n", len, s); | |
146 | } | |
147 | } | |
148 | } | |
149 | ||
150 | static int add_cacheinfo(unsigned int mode, const unsigned char *sha1, | |
151 | const char *path, int stage, int refresh, int options) | |
152 | { | |
153 | struct cache_entry *ce; | |
154 | ce = make_cache_entry(mode, sha1 ? sha1 : null_sha1, path, stage, refresh); | |
155 | if (!ce) | |
156 | return error("addinfo_cache failed for path '%s'", path); | |
157 | return add_cache_entry(ce, options); | |
158 | } | |
159 | ||
9047ebbc MV |
160 | static void init_tree_desc_from_tree(struct tree_desc *desc, struct tree *tree) |
161 | { | |
162 | parse_tree(tree); | |
163 | init_tree_desc(desc, tree->buffer, tree->size); | |
164 | } | |
165 | ||
166 | static int git_merge_trees(int index_only, | |
167 | struct tree *common, | |
168 | struct tree *head, | |
169 | struct tree *merge) | |
170 | { | |
171 | int rc; | |
172 | struct tree_desc t[3]; | |
173 | struct unpack_trees_options opts; | |
174 | ||
175 | memset(&opts, 0, sizeof(opts)); | |
176 | if (index_only) | |
177 | opts.index_only = 1; | |
178 | else | |
179 | opts.update = 1; | |
180 | opts.merge = 1; | |
181 | opts.head_idx = 2; | |
182 | opts.fn = threeway_merge; | |
183 | opts.src_index = &the_index; | |
184 | opts.dst_index = &the_index; | |
185 | ||
186 | init_tree_desc_from_tree(t+0, common); | |
187 | init_tree_desc_from_tree(t+1, head); | |
188 | init_tree_desc_from_tree(t+2, merge); | |
189 | ||
190 | rc = unpack_trees(3, t, &opts); | |
191 | cache_tree_free(&active_cache_tree); | |
192 | return rc; | |
193 | } | |
194 | ||
8a2fce18 | 195 | struct tree *write_tree_from_memory(struct merge_options *o) |
9047ebbc MV |
196 | { |
197 | struct tree *result = NULL; | |
198 | ||
199 | if (unmerged_cache()) { | |
200 | int i; | |
8a2fce18 | 201 | output(o, 0, "There are unmerged index entries:"); |
9047ebbc MV |
202 | for (i = 0; i < active_nr; i++) { |
203 | struct cache_entry *ce = active_cache[i]; | |
204 | if (ce_stage(ce)) | |
8a2fce18 | 205 | output(o, 0, "%d %.*s", ce_stage(ce), ce_namelen(ce), ce->name); |
9047ebbc MV |
206 | } |
207 | return NULL; | |
208 | } | |
209 | ||
210 | if (!active_cache_tree) | |
211 | active_cache_tree = cache_tree(); | |
212 | ||
213 | if (!cache_tree_fully_valid(active_cache_tree) && | |
214 | cache_tree_update(active_cache_tree, | |
215 | active_cache, active_nr, 0, 0) < 0) | |
216 | die("error building trees"); | |
217 | ||
218 | result = lookup_tree(active_cache_tree->sha1); | |
219 | ||
220 | return result; | |
221 | } | |
222 | ||
223 | static int save_files_dirs(const unsigned char *sha1, | |
224 | const char *base, int baselen, const char *path, | |
225 | unsigned int mode, int stage, void *context) | |
226 | { | |
227 | int len = strlen(path); | |
228 | char *newpath = xmalloc(baselen + len + 1); | |
696ee23c MV |
229 | struct merge_options *o = context; |
230 | ||
9047ebbc MV |
231 | memcpy(newpath, base, baselen); |
232 | memcpy(newpath + baselen, path, len); | |
233 | newpath[baselen + len] = '\0'; | |
234 | ||
235 | if (S_ISDIR(mode)) | |
696ee23c | 236 | string_list_insert(newpath, &o->current_directory_set); |
9047ebbc | 237 | else |
696ee23c | 238 | string_list_insert(newpath, &o->current_file_set); |
9047ebbc MV |
239 | free(newpath); |
240 | ||
241 | return READ_TREE_RECURSIVE; | |
242 | } | |
243 | ||
696ee23c | 244 | static int get_files_dirs(struct merge_options *o, struct tree *tree) |
9047ebbc MV |
245 | { |
246 | int n; | |
696ee23c | 247 | if (read_tree_recursive(tree, "", 0, 0, NULL, save_files_dirs, o)) |
9047ebbc | 248 | return 0; |
696ee23c | 249 | n = o->current_file_set.nr + o->current_directory_set.nr; |
9047ebbc MV |
250 | return n; |
251 | } | |
252 | ||
253 | /* | |
254 | * Returns an index_entry instance which doesn't have to correspond to | |
255 | * a real cache entry in Git's index. | |
256 | */ | |
257 | static struct stage_data *insert_stage_data(const char *path, | |
258 | struct tree *o, struct tree *a, struct tree *b, | |
259 | struct string_list *entries) | |
260 | { | |
261 | struct string_list_item *item; | |
262 | struct stage_data *e = xcalloc(1, sizeof(struct stage_data)); | |
263 | get_tree_entry(o->object.sha1, path, | |
264 | e->stages[1].sha, &e->stages[1].mode); | |
265 | get_tree_entry(a->object.sha1, path, | |
266 | e->stages[2].sha, &e->stages[2].mode); | |
267 | get_tree_entry(b->object.sha1, path, | |
268 | e->stages[3].sha, &e->stages[3].mode); | |
269 | item = string_list_insert(path, entries); | |
270 | item->util = e; | |
271 | return e; | |
272 | } | |
273 | ||
274 | /* | |
275 | * Create a dictionary mapping file names to stage_data objects. The | |
276 | * dictionary contains one entry for every path with a non-zero stage entry. | |
277 | */ | |
278 | static struct string_list *get_unmerged(void) | |
279 | { | |
280 | struct string_list *unmerged = xcalloc(1, sizeof(struct string_list)); | |
281 | int i; | |
282 | ||
283 | unmerged->strdup_strings = 1; | |
284 | ||
285 | for (i = 0; i < active_nr; i++) { | |
286 | struct string_list_item *item; | |
287 | struct stage_data *e; | |
288 | struct cache_entry *ce = active_cache[i]; | |
289 | if (!ce_stage(ce)) | |
290 | continue; | |
291 | ||
292 | item = string_list_lookup(ce->name, unmerged); | |
293 | if (!item) { | |
294 | item = string_list_insert(ce->name, unmerged); | |
295 | item->util = xcalloc(1, sizeof(struct stage_data)); | |
296 | } | |
297 | e = item->util; | |
298 | e->stages[ce_stage(ce)].mode = ce->ce_mode; | |
299 | hashcpy(e->stages[ce_stage(ce)].sha, ce->sha1); | |
300 | } | |
301 | ||
302 | return unmerged; | |
303 | } | |
304 | ||
305 | struct rename | |
306 | { | |
307 | struct diff_filepair *pair; | |
308 | struct stage_data *src_entry; | |
309 | struct stage_data *dst_entry; | |
310 | unsigned processed:1; | |
311 | }; | |
312 | ||
313 | /* | |
314 | * Get information of all renames which occurred between 'o_tree' and | |
315 | * 'tree'. We need the three trees in the merge ('o_tree', 'a_tree' and | |
316 | * 'b_tree') to be able to associate the correct cache entries with | |
317 | * the rename information. 'tree' is always equal to either a_tree or b_tree. | |
318 | */ | |
8a2fce18 MV |
319 | static struct string_list *get_renames(struct merge_options *o, |
320 | struct tree *tree, | |
321 | struct tree *o_tree, | |
322 | struct tree *a_tree, | |
323 | struct tree *b_tree, | |
324 | struct string_list *entries) | |
9047ebbc MV |
325 | { |
326 | int i; | |
327 | struct string_list *renames; | |
328 | struct diff_options opts; | |
329 | ||
330 | renames = xcalloc(1, sizeof(struct string_list)); | |
331 | diff_setup(&opts); | |
332 | DIFF_OPT_SET(&opts, RECURSIVE); | |
333 | opts.detect_rename = DIFF_DETECT_RENAME; | |
8a2fce18 MV |
334 | opts.rename_limit = o->merge_rename_limit >= 0 ? o->merge_rename_limit : |
335 | o->diff_rename_limit >= 0 ? o->diff_rename_limit : | |
9047ebbc MV |
336 | 500; |
337 | opts.warn_on_too_large_rename = 1; | |
338 | opts.output_format = DIFF_FORMAT_NO_OUTPUT; | |
339 | if (diff_setup_done(&opts) < 0) | |
340 | die("diff setup failed"); | |
341 | diff_tree_sha1(o_tree->object.sha1, tree->object.sha1, "", &opts); | |
342 | diffcore_std(&opts); | |
343 | for (i = 0; i < diff_queued_diff.nr; ++i) { | |
344 | struct string_list_item *item; | |
345 | struct rename *re; | |
346 | struct diff_filepair *pair = diff_queued_diff.queue[i]; | |
347 | if (pair->status != 'R') { | |
348 | diff_free_filepair(pair); | |
349 | continue; | |
350 | } | |
351 | re = xmalloc(sizeof(*re)); | |
352 | re->processed = 0; | |
353 | re->pair = pair; | |
354 | item = string_list_lookup(re->pair->one->path, entries); | |
355 | if (!item) | |
356 | re->src_entry = insert_stage_data(re->pair->one->path, | |
357 | o_tree, a_tree, b_tree, entries); | |
358 | else | |
359 | re->src_entry = item->util; | |
360 | ||
361 | item = string_list_lookup(re->pair->two->path, entries); | |
362 | if (!item) | |
363 | re->dst_entry = insert_stage_data(re->pair->two->path, | |
364 | o_tree, a_tree, b_tree, entries); | |
365 | else | |
366 | re->dst_entry = item->util; | |
367 | item = string_list_insert(pair->one->path, renames); | |
368 | item->util = re; | |
369 | } | |
370 | opts.output_format = DIFF_FORMAT_NO_OUTPUT; | |
371 | diff_queued_diff.nr = 0; | |
372 | diff_flush(&opts); | |
373 | return renames; | |
374 | } | |
375 | ||
376 | static int update_stages(const char *path, struct diff_filespec *o, | |
377 | struct diff_filespec *a, struct diff_filespec *b, | |
378 | int clear) | |
379 | { | |
380 | int options = ADD_CACHE_OK_TO_ADD | ADD_CACHE_OK_TO_REPLACE; | |
381 | if (clear) | |
382 | if (remove_file_from_cache(path)) | |
383 | return -1; | |
384 | if (o) | |
385 | if (add_cacheinfo(o->mode, o->sha1, path, 1, 0, options)) | |
386 | return -1; | |
387 | if (a) | |
388 | if (add_cacheinfo(a->mode, a->sha1, path, 2, 0, options)) | |
389 | return -1; | |
390 | if (b) | |
391 | if (add_cacheinfo(b->mode, b->sha1, path, 3, 0, options)) | |
392 | return -1; | |
393 | return 0; | |
394 | } | |
395 | ||
b7fa51da MV |
396 | static int remove_file(struct merge_options *o, int clean, |
397 | const char *path, int no_wd) | |
9047ebbc | 398 | { |
b7fa51da MV |
399 | int update_cache = o->call_depth || clean; |
400 | int update_working_directory = !o->call_depth && !no_wd; | |
9047ebbc MV |
401 | |
402 | if (update_cache) { | |
403 | if (remove_file_from_cache(path)) | |
404 | return -1; | |
405 | } | |
406 | if (update_working_directory) { | |
15dc66ab | 407 | if (remove_path(path) && errno != ENOENT) |
9047ebbc | 408 | return -1; |
9047ebbc MV |
409 | } |
410 | return 0; | |
411 | } | |
412 | ||
696ee23c | 413 | static char *unique_path(struct merge_options *o, const char *path, const char *branch) |
9047ebbc MV |
414 | { |
415 | char *newpath = xmalloc(strlen(path) + 1 + strlen(branch) + 8 + 1); | |
416 | int suffix = 0; | |
417 | struct stat st; | |
418 | char *p = newpath + strlen(path); | |
419 | strcpy(newpath, path); | |
420 | *(p++) = '~'; | |
421 | strcpy(p, branch); | |
422 | for (; *p; ++p) | |
423 | if ('/' == *p) | |
424 | *p = '_'; | |
696ee23c MV |
425 | while (string_list_has_string(&o->current_file_set, newpath) || |
426 | string_list_has_string(&o->current_directory_set, newpath) || | |
9047ebbc MV |
427 | lstat(newpath, &st) == 0) |
428 | sprintf(p, "_%d", suffix++); | |
429 | ||
696ee23c | 430 | string_list_insert(newpath, &o->current_file_set); |
9047ebbc MV |
431 | return newpath; |
432 | } | |
433 | ||
434 | static void flush_buffer(int fd, const char *buf, unsigned long size) | |
435 | { | |
436 | while (size > 0) { | |
437 | long ret = write_in_full(fd, buf, size); | |
438 | if (ret < 0) { | |
439 | /* Ignore epipe */ | |
440 | if (errno == EPIPE) | |
441 | break; | |
442 | die("merge-recursive: %s", strerror(errno)); | |
443 | } else if (!ret) { | |
444 | die("merge-recursive: disk full?"); | |
445 | } | |
446 | size -= ret; | |
447 | buf += ret; | |
448 | } | |
449 | } | |
450 | ||
451 | static int make_room_for_path(const char *path) | |
452 | { | |
453 | int status; | |
454 | const char *msg = "failed to create path '%s'%s"; | |
455 | ||
456 | status = safe_create_leading_directories_const(path); | |
457 | if (status) { | |
458 | if (status == -3) { | |
459 | /* something else exists */ | |
460 | error(msg, path, ": perhaps a D/F conflict?"); | |
461 | return -1; | |
462 | } | |
463 | die(msg, path, ""); | |
464 | } | |
465 | ||
466 | /* Successful unlink is good.. */ | |
467 | if (!unlink(path)) | |
468 | return 0; | |
469 | /* .. and so is no existing file */ | |
470 | if (errno == ENOENT) | |
471 | return 0; | |
472 | /* .. but not some other error (who really cares what?) */ | |
473 | return error(msg, path, ": perhaps a D/F conflict?"); | |
474 | } | |
475 | ||
b7fa51da MV |
476 | static void update_file_flags(struct merge_options *o, |
477 | const unsigned char *sha, | |
9047ebbc MV |
478 | unsigned mode, |
479 | const char *path, | |
480 | int update_cache, | |
481 | int update_wd) | |
482 | { | |
b7fa51da | 483 | if (o->call_depth) |
9047ebbc MV |
484 | update_wd = 0; |
485 | ||
486 | if (update_wd) { | |
487 | enum object_type type; | |
488 | void *buf; | |
489 | unsigned long size; | |
490 | ||
491 | if (S_ISGITLINK(mode)) | |
492 | die("cannot read object %s '%s': It is a submodule!", | |
493 | sha1_to_hex(sha), path); | |
494 | ||
495 | buf = read_sha1_file(sha, &type, &size); | |
496 | if (!buf) | |
497 | die("cannot read object %s '%s'", sha1_to_hex(sha), path); | |
498 | if (type != OBJ_BLOB) | |
499 | die("blob expected for %s '%s'", sha1_to_hex(sha), path); | |
500 | if (S_ISREG(mode)) { | |
501 | struct strbuf strbuf; | |
502 | strbuf_init(&strbuf, 0); | |
503 | if (convert_to_working_tree(path, buf, size, &strbuf)) { | |
504 | free(buf); | |
505 | size = strbuf.len; | |
506 | buf = strbuf_detach(&strbuf, NULL); | |
507 | } | |
508 | } | |
509 | ||
510 | if (make_room_for_path(path) < 0) { | |
511 | update_wd = 0; | |
512 | free(buf); | |
513 | goto update_index; | |
514 | } | |
515 | if (S_ISREG(mode) || (!has_symlinks && S_ISLNK(mode))) { | |
516 | int fd; | |
517 | if (mode & 0100) | |
518 | mode = 0777; | |
519 | else | |
520 | mode = 0666; | |
521 | fd = open(path, O_WRONLY | O_TRUNC | O_CREAT, mode); | |
522 | if (fd < 0) | |
523 | die("failed to open %s: %s", path, strerror(errno)); | |
524 | flush_buffer(fd, buf, size); | |
525 | close(fd); | |
526 | } else if (S_ISLNK(mode)) { | |
527 | char *lnk = xmemdupz(buf, size); | |
528 | safe_create_leading_directories_const(path); | |
529 | unlink(path); | |
530 | symlink(lnk, path); | |
531 | free(lnk); | |
532 | } else | |
533 | die("do not know what to do with %06o %s '%s'", | |
534 | mode, sha1_to_hex(sha), path); | |
535 | free(buf); | |
536 | } | |
537 | update_index: | |
538 | if (update_cache) | |
539 | add_cacheinfo(mode, sha, path, 0, update_wd, ADD_CACHE_OK_TO_ADD); | |
540 | } | |
541 | ||
b7fa51da MV |
542 | static void update_file(struct merge_options *o, |
543 | int clean, | |
9047ebbc MV |
544 | const unsigned char *sha, |
545 | unsigned mode, | |
546 | const char *path) | |
547 | { | |
b7fa51da | 548 | update_file_flags(o, sha, mode, path, o->call_depth || clean, !o->call_depth); |
9047ebbc MV |
549 | } |
550 | ||
551 | /* Low level file merging, update and removal */ | |
552 | ||
553 | struct merge_file_info | |
554 | { | |
555 | unsigned char sha[20]; | |
556 | unsigned mode; | |
557 | unsigned clean:1, | |
558 | merge:1; | |
559 | }; | |
560 | ||
561 | static void fill_mm(const unsigned char *sha1, mmfile_t *mm) | |
562 | { | |
563 | unsigned long size; | |
564 | enum object_type type; | |
565 | ||
566 | if (!hashcmp(sha1, null_sha1)) { | |
567 | mm->ptr = xstrdup(""); | |
568 | mm->size = 0; | |
569 | return; | |
570 | } | |
571 | ||
572 | mm->ptr = read_sha1_file(sha1, &type, &size); | |
573 | if (!mm->ptr || type != OBJ_BLOB) | |
574 | die("unable to read blob object %s", sha1_to_hex(sha1)); | |
575 | mm->size = size; | |
576 | } | |
577 | ||
b7fa51da MV |
578 | static int merge_3way(struct merge_options *o, |
579 | mmbuffer_t *result_buf, | |
580 | struct diff_filespec *one, | |
9047ebbc MV |
581 | struct diff_filespec *a, |
582 | struct diff_filespec *b, | |
583 | const char *branch1, | |
584 | const char *branch2) | |
585 | { | |
586 | mmfile_t orig, src1, src2; | |
587 | char *name1, *name2; | |
588 | int merge_status; | |
589 | ||
590 | name1 = xstrdup(mkpath("%s:%s", branch1, a->path)); | |
591 | name2 = xstrdup(mkpath("%s:%s", branch2, b->path)); | |
592 | ||
b7fa51da | 593 | fill_mm(one->sha1, &orig); |
9047ebbc MV |
594 | fill_mm(a->sha1, &src1); |
595 | fill_mm(b->sha1, &src2); | |
596 | ||
597 | merge_status = ll_merge(result_buf, a->path, &orig, | |
598 | &src1, name1, &src2, name2, | |
b7fa51da | 599 | o->call_depth); |
9047ebbc MV |
600 | |
601 | free(name1); | |
602 | free(name2); | |
603 | free(orig.ptr); | |
604 | free(src1.ptr); | |
605 | free(src2.ptr); | |
606 | return merge_status; | |
607 | } | |
608 | ||
b7fa51da MV |
609 | static struct merge_file_info merge_file(struct merge_options *o, |
610 | struct diff_filespec *one, | |
611 | struct diff_filespec *a, | |
612 | struct diff_filespec *b, | |
613 | const char *branch1, | |
614 | const char *branch2) | |
9047ebbc MV |
615 | { |
616 | struct merge_file_info result; | |
617 | result.merge = 0; | |
618 | result.clean = 1; | |
619 | ||
620 | if ((S_IFMT & a->mode) != (S_IFMT & b->mode)) { | |
621 | result.clean = 0; | |
622 | if (S_ISREG(a->mode)) { | |
623 | result.mode = a->mode; | |
624 | hashcpy(result.sha, a->sha1); | |
625 | } else { | |
626 | result.mode = b->mode; | |
627 | hashcpy(result.sha, b->sha1); | |
628 | } | |
629 | } else { | |
b7fa51da | 630 | if (!sha_eq(a->sha1, one->sha1) && !sha_eq(b->sha1, one->sha1)) |
9047ebbc MV |
631 | result.merge = 1; |
632 | ||
633 | /* | |
634 | * Merge modes | |
635 | */ | |
b7fa51da | 636 | if (a->mode == b->mode || a->mode == one->mode) |
9047ebbc MV |
637 | result.mode = b->mode; |
638 | else { | |
639 | result.mode = a->mode; | |
b7fa51da | 640 | if (b->mode != one->mode) { |
9047ebbc MV |
641 | result.clean = 0; |
642 | result.merge = 1; | |
643 | } | |
644 | } | |
645 | ||
b7fa51da | 646 | if (sha_eq(a->sha1, b->sha1) || sha_eq(a->sha1, one->sha1)) |
9047ebbc | 647 | hashcpy(result.sha, b->sha1); |
b7fa51da | 648 | else if (sha_eq(b->sha1, one->sha1)) |
9047ebbc MV |
649 | hashcpy(result.sha, a->sha1); |
650 | else if (S_ISREG(a->mode)) { | |
651 | mmbuffer_t result_buf; | |
652 | int merge_status; | |
653 | ||
b7fa51da | 654 | merge_status = merge_3way(o, &result_buf, one, a, b, |
9047ebbc MV |
655 | branch1, branch2); |
656 | ||
657 | if ((merge_status < 0) || !result_buf.ptr) | |
658 | die("Failed to execute internal merge"); | |
659 | ||
660 | if (write_sha1_file(result_buf.ptr, result_buf.size, | |
661 | blob_type, result.sha)) | |
662 | die("Unable to add %s to database", | |
663 | a->path); | |
664 | ||
665 | free(result_buf.ptr); | |
666 | result.clean = (merge_status == 0); | |
667 | } else if (S_ISGITLINK(a->mode)) { | |
668 | result.clean = 0; | |
669 | hashcpy(result.sha, a->sha1); | |
670 | } else if (S_ISLNK(a->mode)) { | |
671 | hashcpy(result.sha, a->sha1); | |
672 | ||
673 | if (!sha_eq(a->sha1, b->sha1)) | |
674 | result.clean = 0; | |
675 | } else { | |
676 | die("unsupported object type in the tree"); | |
677 | } | |
678 | } | |
679 | ||
680 | return result; | |
681 | } | |
682 | ||
8a2fce18 MV |
683 | static void conflict_rename_rename(struct merge_options *o, |
684 | struct rename *ren1, | |
9047ebbc MV |
685 | const char *branch1, |
686 | struct rename *ren2, | |
687 | const char *branch2) | |
688 | { | |
689 | char *del[2]; | |
690 | int delp = 0; | |
691 | const char *ren1_dst = ren1->pair->two->path; | |
692 | const char *ren2_dst = ren2->pair->two->path; | |
693 | const char *dst_name1 = ren1_dst; | |
694 | const char *dst_name2 = ren2_dst; | |
696ee23c MV |
695 | if (string_list_has_string(&o->current_directory_set, ren1_dst)) { |
696 | dst_name1 = del[delp++] = unique_path(o, ren1_dst, branch1); | |
8a2fce18 | 697 | output(o, 1, "%s is a directory in %s adding as %s instead", |
9047ebbc | 698 | ren1_dst, branch2, dst_name1); |
b7fa51da | 699 | remove_file(o, 0, ren1_dst, 0); |
9047ebbc | 700 | } |
696ee23c MV |
701 | if (string_list_has_string(&o->current_directory_set, ren2_dst)) { |
702 | dst_name2 = del[delp++] = unique_path(o, ren2_dst, branch2); | |
8a2fce18 | 703 | output(o, 1, "%s is a directory in %s adding as %s instead", |
9047ebbc | 704 | ren2_dst, branch1, dst_name2); |
b7fa51da | 705 | remove_file(o, 0, ren2_dst, 0); |
9047ebbc | 706 | } |
b7fa51da | 707 | if (o->call_depth) { |
9047ebbc MV |
708 | remove_file_from_cache(dst_name1); |
709 | remove_file_from_cache(dst_name2); | |
710 | /* | |
711 | * Uncomment to leave the conflicting names in the resulting tree | |
712 | * | |
b7fa51da MV |
713 | * update_file(o, 0, ren1->pair->two->sha1, ren1->pair->two->mode, dst_name1); |
714 | * update_file(o, 0, ren2->pair->two->sha1, ren2->pair->two->mode, dst_name2); | |
9047ebbc MV |
715 | */ |
716 | } else { | |
717 | update_stages(dst_name1, NULL, ren1->pair->two, NULL, 1); | |
718 | update_stages(dst_name2, NULL, NULL, ren2->pair->two, 1); | |
719 | } | |
720 | while (delp--) | |
721 | free(del[delp]); | |
722 | } | |
723 | ||
8a2fce18 MV |
724 | static void conflict_rename_dir(struct merge_options *o, |
725 | struct rename *ren1, | |
9047ebbc MV |
726 | const char *branch1) |
727 | { | |
696ee23c | 728 | char *new_path = unique_path(o, ren1->pair->two->path, branch1); |
8a2fce18 | 729 | output(o, 1, "Renaming %s to %s instead", ren1->pair->one->path, new_path); |
b7fa51da MV |
730 | remove_file(o, 0, ren1->pair->two->path, 0); |
731 | update_file(o, 0, ren1->pair->two->sha1, ren1->pair->two->mode, new_path); | |
9047ebbc MV |
732 | free(new_path); |
733 | } | |
734 | ||
8a2fce18 MV |
735 | static void conflict_rename_rename_2(struct merge_options *o, |
736 | struct rename *ren1, | |
9047ebbc MV |
737 | const char *branch1, |
738 | struct rename *ren2, | |
739 | const char *branch2) | |
740 | { | |
696ee23c MV |
741 | char *new_path1 = unique_path(o, ren1->pair->two->path, branch1); |
742 | char *new_path2 = unique_path(o, ren2->pair->two->path, branch2); | |
8a2fce18 | 743 | output(o, 1, "Renaming %s to %s and %s to %s instead", |
9047ebbc MV |
744 | ren1->pair->one->path, new_path1, |
745 | ren2->pair->one->path, new_path2); | |
b7fa51da MV |
746 | remove_file(o, 0, ren1->pair->two->path, 0); |
747 | update_file(o, 0, ren1->pair->two->sha1, ren1->pair->two->mode, new_path1); | |
748 | update_file(o, 0, ren2->pair->two->sha1, ren2->pair->two->mode, new_path2); | |
9047ebbc MV |
749 | free(new_path2); |
750 | free(new_path1); | |
751 | } | |
752 | ||
8a2fce18 MV |
753 | static int process_renames(struct merge_options *o, |
754 | struct string_list *a_renames, | |
755 | struct string_list *b_renames) | |
9047ebbc MV |
756 | { |
757 | int clean_merge = 1, i, j; | |
758 | struct string_list a_by_dst = {NULL, 0, 0, 0}, b_by_dst = {NULL, 0, 0, 0}; | |
759 | const struct rename *sre; | |
760 | ||
761 | for (i = 0; i < a_renames->nr; i++) { | |
762 | sre = a_renames->items[i].util; | |
763 | string_list_insert(sre->pair->two->path, &a_by_dst)->util | |
764 | = sre->dst_entry; | |
765 | } | |
766 | for (i = 0; i < b_renames->nr; i++) { | |
767 | sre = b_renames->items[i].util; | |
768 | string_list_insert(sre->pair->two->path, &b_by_dst)->util | |
769 | = sre->dst_entry; | |
770 | } | |
771 | ||
772 | for (i = 0, j = 0; i < a_renames->nr || j < b_renames->nr;) { | |
773 | int compare; | |
774 | char *src; | |
775 | struct string_list *renames1, *renames2, *renames2Dst; | |
776 | struct rename *ren1 = NULL, *ren2 = NULL; | |
777 | const char *branch1, *branch2; | |
778 | const char *ren1_src, *ren1_dst; | |
779 | ||
780 | if (i >= a_renames->nr) { | |
781 | compare = 1; | |
782 | ren2 = b_renames->items[j++].util; | |
783 | } else if (j >= b_renames->nr) { | |
784 | compare = -1; | |
785 | ren1 = a_renames->items[i++].util; | |
786 | } else { | |
787 | compare = strcmp(a_renames->items[i].string, | |
788 | b_renames->items[j].string); | |
789 | if (compare <= 0) | |
790 | ren1 = a_renames->items[i++].util; | |
791 | if (compare >= 0) | |
792 | ren2 = b_renames->items[j++].util; | |
793 | } | |
794 | ||
795 | /* TODO: refactor, so that 1/2 are not needed */ | |
796 | if (ren1) { | |
797 | renames1 = a_renames; | |
798 | renames2 = b_renames; | |
799 | renames2Dst = &b_by_dst; | |
8a2fce18 MV |
800 | branch1 = o->branch1; |
801 | branch2 = o->branch2; | |
9047ebbc MV |
802 | } else { |
803 | struct rename *tmp; | |
804 | renames1 = b_renames; | |
805 | renames2 = a_renames; | |
806 | renames2Dst = &a_by_dst; | |
8a2fce18 MV |
807 | branch1 = o->branch2; |
808 | branch2 = o->branch1; | |
9047ebbc MV |
809 | tmp = ren2; |
810 | ren2 = ren1; | |
811 | ren1 = tmp; | |
812 | } | |
813 | src = ren1->pair->one->path; | |
814 | ||
815 | ren1->dst_entry->processed = 1; | |
816 | ren1->src_entry->processed = 1; | |
817 | ||
818 | if (ren1->processed) | |
819 | continue; | |
820 | ren1->processed = 1; | |
821 | ||
822 | ren1_src = ren1->pair->one->path; | |
823 | ren1_dst = ren1->pair->two->path; | |
824 | ||
825 | if (ren2) { | |
826 | const char *ren2_src = ren2->pair->one->path; | |
827 | const char *ren2_dst = ren2->pair->two->path; | |
828 | /* Renamed in 1 and renamed in 2 */ | |
829 | if (strcmp(ren1_src, ren2_src) != 0) | |
830 | die("ren1.src != ren2.src"); | |
831 | ren2->dst_entry->processed = 1; | |
832 | ren2->processed = 1; | |
833 | if (strcmp(ren1_dst, ren2_dst) != 0) { | |
834 | clean_merge = 0; | |
8a2fce18 | 835 | output(o, 1, "CONFLICT (rename/rename): " |
9047ebbc MV |
836 | "Rename \"%s\"->\"%s\" in branch \"%s\" " |
837 | "rename \"%s\"->\"%s\" in \"%s\"%s", | |
838 | src, ren1_dst, branch1, | |
839 | src, ren2_dst, branch2, | |
b7fa51da MV |
840 | o->call_depth ? " (left unresolved)": ""); |
841 | if (o->call_depth) { | |
9047ebbc | 842 | remove_file_from_cache(src); |
b7fa51da | 843 | update_file(o, 0, ren1->pair->one->sha1, |
9047ebbc MV |
844 | ren1->pair->one->mode, src); |
845 | } | |
8a2fce18 | 846 | conflict_rename_rename(o, ren1, branch1, ren2, branch2); |
9047ebbc MV |
847 | } else { |
848 | struct merge_file_info mfi; | |
b7fa51da MV |
849 | remove_file(o, 1, ren1_src, 1); |
850 | mfi = merge_file(o, | |
851 | ren1->pair->one, | |
9047ebbc MV |
852 | ren1->pair->two, |
853 | ren2->pair->two, | |
854 | branch1, | |
855 | branch2); | |
856 | if (mfi.merge || !mfi.clean) | |
8a2fce18 | 857 | output(o, 1, "Renaming %s->%s", src, ren1_dst); |
9047ebbc MV |
858 | |
859 | if (mfi.merge) | |
8a2fce18 | 860 | output(o, 2, "Auto-merging %s", ren1_dst); |
9047ebbc MV |
861 | |
862 | if (!mfi.clean) { | |
8a2fce18 | 863 | output(o, 1, "CONFLICT (content): merge conflict in %s", |
9047ebbc MV |
864 | ren1_dst); |
865 | clean_merge = 0; | |
866 | ||
b7fa51da | 867 | if (!o->call_depth) |
9047ebbc MV |
868 | update_stages(ren1_dst, |
869 | ren1->pair->one, | |
870 | ren1->pair->two, | |
871 | ren2->pair->two, | |
872 | 1 /* clear */); | |
873 | } | |
b7fa51da | 874 | update_file(o, mfi.clean, mfi.sha, mfi.mode, ren1_dst); |
9047ebbc MV |
875 | } |
876 | } else { | |
877 | /* Renamed in 1, maybe changed in 2 */ | |
878 | struct string_list_item *item; | |
879 | /* we only use sha1 and mode of these */ | |
880 | struct diff_filespec src_other, dst_other; | |
881 | int try_merge, stage = a_renames == renames1 ? 3: 2; | |
882 | ||
b7fa51da | 883 | remove_file(o, 1, ren1_src, o->call_depth || stage == 3); |
9047ebbc MV |
884 | |
885 | hashcpy(src_other.sha1, ren1->src_entry->stages[stage].sha); | |
886 | src_other.mode = ren1->src_entry->stages[stage].mode; | |
887 | hashcpy(dst_other.sha1, ren1->dst_entry->stages[stage].sha); | |
888 | dst_other.mode = ren1->dst_entry->stages[stage].mode; | |
889 | ||
890 | try_merge = 0; | |
891 | ||
696ee23c | 892 | if (string_list_has_string(&o->current_directory_set, ren1_dst)) { |
9047ebbc | 893 | clean_merge = 0; |
8a2fce18 | 894 | output(o, 1, "CONFLICT (rename/directory): Rename %s->%s in %s " |
9047ebbc MV |
895 | " directory %s added in %s", |
896 | ren1_src, ren1_dst, branch1, | |
897 | ren1_dst, branch2); | |
8a2fce18 | 898 | conflict_rename_dir(o, ren1, branch1); |
9047ebbc MV |
899 | } else if (sha_eq(src_other.sha1, null_sha1)) { |
900 | clean_merge = 0; | |
8a2fce18 | 901 | output(o, 1, "CONFLICT (rename/delete): Rename %s->%s in %s " |
9047ebbc MV |
902 | "and deleted in %s", |
903 | ren1_src, ren1_dst, branch1, | |
904 | branch2); | |
b7fa51da | 905 | update_file(o, 0, ren1->pair->two->sha1, ren1->pair->two->mode, ren1_dst); |
9047ebbc MV |
906 | } else if (!sha_eq(dst_other.sha1, null_sha1)) { |
907 | const char *new_path; | |
908 | clean_merge = 0; | |
909 | try_merge = 1; | |
8a2fce18 | 910 | output(o, 1, "CONFLICT (rename/add): Rename %s->%s in %s. " |
9047ebbc MV |
911 | "%s added in %s", |
912 | ren1_src, ren1_dst, branch1, | |
913 | ren1_dst, branch2); | |
696ee23c | 914 | new_path = unique_path(o, ren1_dst, branch2); |
8a2fce18 | 915 | output(o, 1, "Adding as %s instead", new_path); |
b7fa51da | 916 | update_file(o, 0, dst_other.sha1, dst_other.mode, new_path); |
9047ebbc MV |
917 | } else if ((item = string_list_lookup(ren1_dst, renames2Dst))) { |
918 | ren2 = item->util; | |
919 | clean_merge = 0; | |
920 | ren2->processed = 1; | |
8a2fce18 MV |
921 | output(o, 1, "CONFLICT (rename/rename): " |
922 | "Rename %s->%s in %s. " | |
9047ebbc MV |
923 | "Rename %s->%s in %s", |
924 | ren1_src, ren1_dst, branch1, | |
925 | ren2->pair->one->path, ren2->pair->two->path, branch2); | |
8a2fce18 | 926 | conflict_rename_rename_2(o, ren1, branch1, ren2, branch2); |
9047ebbc MV |
927 | } else |
928 | try_merge = 1; | |
929 | ||
930 | if (try_merge) { | |
8a2fce18 | 931 | struct diff_filespec *one, *a, *b; |
9047ebbc MV |
932 | struct merge_file_info mfi; |
933 | src_other.path = (char *)ren1_src; | |
934 | ||
8a2fce18 | 935 | one = ren1->pair->one; |
9047ebbc MV |
936 | if (a_renames == renames1) { |
937 | a = ren1->pair->two; | |
938 | b = &src_other; | |
939 | } else { | |
940 | b = ren1->pair->two; | |
941 | a = &src_other; | |
942 | } | |
b7fa51da | 943 | mfi = merge_file(o, one, a, b, |
8a2fce18 | 944 | o->branch1, o->branch2); |
9047ebbc MV |
945 | |
946 | if (mfi.clean && | |
947 | sha_eq(mfi.sha, ren1->pair->two->sha1) && | |
948 | mfi.mode == ren1->pair->two->mode) | |
949 | /* | |
950 | * This messaged is part of | |
951 | * t6022 test. If you change | |
952 | * it update the test too. | |
953 | */ | |
8a2fce18 | 954 | output(o, 3, "Skipped %s (merged same as existing)", ren1_dst); |
9047ebbc MV |
955 | else { |
956 | if (mfi.merge || !mfi.clean) | |
8a2fce18 | 957 | output(o, 1, "Renaming %s => %s", ren1_src, ren1_dst); |
9047ebbc | 958 | if (mfi.merge) |
8a2fce18 | 959 | output(o, 2, "Auto-merging %s", ren1_dst); |
9047ebbc | 960 | if (!mfi.clean) { |
8a2fce18 | 961 | output(o, 1, "CONFLICT (rename/modify): Merge conflict in %s", |
9047ebbc MV |
962 | ren1_dst); |
963 | clean_merge = 0; | |
964 | ||
b7fa51da | 965 | if (!o->call_depth) |
9047ebbc | 966 | update_stages(ren1_dst, |
8a2fce18 | 967 | one, a, b, 1); |
9047ebbc | 968 | } |
b7fa51da | 969 | update_file(o, mfi.clean, mfi.sha, mfi.mode, ren1_dst); |
9047ebbc MV |
970 | } |
971 | } | |
972 | } | |
973 | } | |
974 | string_list_clear(&a_by_dst, 0); | |
975 | string_list_clear(&b_by_dst, 0); | |
976 | ||
977 | return clean_merge; | |
978 | } | |
979 | ||
980 | static unsigned char *stage_sha(const unsigned char *sha, unsigned mode) | |
981 | { | |
982 | return (is_null_sha1(sha) || mode == 0) ? NULL: (unsigned char *)sha; | |
983 | } | |
984 | ||
985 | /* Per entry merge function */ | |
8a2fce18 MV |
986 | static int process_entry(struct merge_options *o, |
987 | const char *path, struct stage_data *entry) | |
9047ebbc MV |
988 | { |
989 | /* | |
990 | printf("processing entry, clean cache: %s\n", index_only ? "yes": "no"); | |
991 | print_index_entry("\tpath: ", entry); | |
992 | */ | |
993 | int clean_merge = 1; | |
994 | unsigned o_mode = entry->stages[1].mode; | |
995 | unsigned a_mode = entry->stages[2].mode; | |
996 | unsigned b_mode = entry->stages[3].mode; | |
997 | unsigned char *o_sha = stage_sha(entry->stages[1].sha, o_mode); | |
998 | unsigned char *a_sha = stage_sha(entry->stages[2].sha, a_mode); | |
999 | unsigned char *b_sha = stage_sha(entry->stages[3].sha, b_mode); | |
1000 | ||
1001 | if (o_sha && (!a_sha || !b_sha)) { | |
1002 | /* Case A: Deleted in one */ | |
1003 | if ((!a_sha && !b_sha) || | |
1004 | (sha_eq(a_sha, o_sha) && !b_sha) || | |
1005 | (!a_sha && sha_eq(b_sha, o_sha))) { | |
1006 | /* Deleted in both or deleted in one and | |
1007 | * unchanged in the other */ | |
1008 | if (a_sha) | |
8a2fce18 | 1009 | output(o, 2, "Removing %s", path); |
9047ebbc | 1010 | /* do not touch working file if it did not exist */ |
b7fa51da | 1011 | remove_file(o, 1, path, !a_sha); |
9047ebbc MV |
1012 | } else { |
1013 | /* Deleted in one and changed in the other */ | |
1014 | clean_merge = 0; | |
1015 | if (!a_sha) { | |
8a2fce18 | 1016 | output(o, 1, "CONFLICT (delete/modify): %s deleted in %s " |
9047ebbc | 1017 | "and modified in %s. Version %s of %s left in tree.", |
8a2fce18 MV |
1018 | path, o->branch1, |
1019 | o->branch2, o->branch2, path); | |
b7fa51da | 1020 | update_file(o, 0, b_sha, b_mode, path); |
9047ebbc | 1021 | } else { |
8a2fce18 | 1022 | output(o, 1, "CONFLICT (delete/modify): %s deleted in %s " |
9047ebbc | 1023 | "and modified in %s. Version %s of %s left in tree.", |
8a2fce18 MV |
1024 | path, o->branch2, |
1025 | o->branch1, o->branch1, path); | |
b7fa51da | 1026 | update_file(o, 0, a_sha, a_mode, path); |
9047ebbc MV |
1027 | } |
1028 | } | |
1029 | ||
1030 | } else if ((!o_sha && a_sha && !b_sha) || | |
1031 | (!o_sha && !a_sha && b_sha)) { | |
1032 | /* Case B: Added in one. */ | |
1033 | const char *add_branch; | |
1034 | const char *other_branch; | |
1035 | unsigned mode; | |
1036 | const unsigned char *sha; | |
1037 | const char *conf; | |
1038 | ||
1039 | if (a_sha) { | |
8a2fce18 MV |
1040 | add_branch = o->branch1; |
1041 | other_branch = o->branch2; | |
9047ebbc MV |
1042 | mode = a_mode; |
1043 | sha = a_sha; | |
1044 | conf = "file/directory"; | |
1045 | } else { | |
8a2fce18 MV |
1046 | add_branch = o->branch2; |
1047 | other_branch = o->branch1; | |
9047ebbc MV |
1048 | mode = b_mode; |
1049 | sha = b_sha; | |
1050 | conf = "directory/file"; | |
1051 | } | |
696ee23c MV |
1052 | if (string_list_has_string(&o->current_directory_set, path)) { |
1053 | const char *new_path = unique_path(o, path, add_branch); | |
9047ebbc | 1054 | clean_merge = 0; |
8a2fce18 | 1055 | output(o, 1, "CONFLICT (%s): There is a directory with name %s in %s. " |
9047ebbc MV |
1056 | "Adding %s as %s", |
1057 | conf, path, other_branch, path, new_path); | |
b7fa51da MV |
1058 | remove_file(o, 0, path, 0); |
1059 | update_file(o, 0, sha, mode, new_path); | |
9047ebbc | 1060 | } else { |
8a2fce18 | 1061 | output(o, 2, "Adding %s", path); |
b7fa51da | 1062 | update_file(o, 1, sha, mode, path); |
9047ebbc MV |
1063 | } |
1064 | } else if (a_sha && b_sha) { | |
1065 | /* Case C: Added in both (check for same permissions) and */ | |
1066 | /* case D: Modified in both, but differently. */ | |
1067 | const char *reason = "content"; | |
1068 | struct merge_file_info mfi; | |
8a2fce18 | 1069 | struct diff_filespec one, a, b; |
9047ebbc MV |
1070 | |
1071 | if (!o_sha) { | |
1072 | reason = "add/add"; | |
1073 | o_sha = (unsigned char *)null_sha1; | |
1074 | } | |
8a2fce18 MV |
1075 | output(o, 2, "Auto-merging %s", path); |
1076 | one.path = a.path = b.path = (char *)path; | |
1077 | hashcpy(one.sha1, o_sha); | |
1078 | one.mode = o_mode; | |
9047ebbc MV |
1079 | hashcpy(a.sha1, a_sha); |
1080 | a.mode = a_mode; | |
1081 | hashcpy(b.sha1, b_sha); | |
1082 | b.mode = b_mode; | |
1083 | ||
b7fa51da | 1084 | mfi = merge_file(o, &one, &a, &b, |
8a2fce18 | 1085 | o->branch1, o->branch2); |
9047ebbc MV |
1086 | |
1087 | clean_merge = mfi.clean; | |
1088 | if (mfi.clean) | |
b7fa51da | 1089 | update_file(o, 1, mfi.sha, mfi.mode, path); |
9047ebbc | 1090 | else if (S_ISGITLINK(mfi.mode)) |
8a2fce18 | 1091 | output(o, 1, "CONFLICT (submodule): Merge conflict in %s " |
9047ebbc MV |
1092 | "- needs %s", path, sha1_to_hex(b.sha1)); |
1093 | else { | |
8a2fce18 | 1094 | output(o, 1, "CONFLICT (%s): Merge conflict in %s", |
9047ebbc MV |
1095 | reason, path); |
1096 | ||
b7fa51da MV |
1097 | if (o->call_depth) |
1098 | update_file(o, 0, mfi.sha, mfi.mode, path); | |
9047ebbc | 1099 | else |
b7fa51da | 1100 | update_file_flags(o, mfi.sha, mfi.mode, path, |
9047ebbc MV |
1101 | 0 /* update_cache */, 1 /* update_working_directory */); |
1102 | } | |
1103 | } else if (!o_sha && !a_sha && !b_sha) { | |
1104 | /* | |
1105 | * this entry was deleted altogether. a_mode == 0 means | |
1106 | * we had that path and want to actively remove it. | |
1107 | */ | |
b7fa51da | 1108 | remove_file(o, 1, path, !a_mode); |
9047ebbc MV |
1109 | } else |
1110 | die("Fatal merge failure, shouldn't happen."); | |
1111 | ||
1112 | return clean_merge; | |
1113 | } | |
1114 | ||
8a2fce18 MV |
1115 | int merge_trees(struct merge_options *o, |
1116 | struct tree *head, | |
9047ebbc MV |
1117 | struct tree *merge, |
1118 | struct tree *common, | |
9047ebbc MV |
1119 | struct tree **result) |
1120 | { | |
1121 | int code, clean; | |
1122 | ||
8a2fce18 | 1123 | if (o->subtree_merge) { |
9047ebbc MV |
1124 | merge = shift_tree_object(head, merge); |
1125 | common = shift_tree_object(head, common); | |
1126 | } | |
1127 | ||
1128 | if (sha_eq(common->object.sha1, merge->object.sha1)) { | |
8a2fce18 | 1129 | output(o, 0, "Already uptodate!"); |
9047ebbc MV |
1130 | *result = head; |
1131 | return 1; | |
1132 | } | |
1133 | ||
b7fa51da | 1134 | code = git_merge_trees(o->call_depth, common, head, merge); |
9047ebbc MV |
1135 | |
1136 | if (code != 0) | |
1137 | die("merging of trees %s and %s failed", | |
1138 | sha1_to_hex(head->object.sha1), | |
1139 | sha1_to_hex(merge->object.sha1)); | |
1140 | ||
1141 | if (unmerged_cache()) { | |
1142 | struct string_list *entries, *re_head, *re_merge; | |
1143 | int i; | |
696ee23c MV |
1144 | string_list_clear(&o->current_file_set, 1); |
1145 | string_list_clear(&o->current_directory_set, 1); | |
1146 | get_files_dirs(o, head); | |
1147 | get_files_dirs(o, merge); | |
9047ebbc MV |
1148 | |
1149 | entries = get_unmerged(); | |
8a2fce18 MV |
1150 | re_head = get_renames(o, head, common, head, merge, entries); |
1151 | re_merge = get_renames(o, merge, common, head, merge, entries); | |
1152 | clean = process_renames(o, re_head, re_merge); | |
9047ebbc MV |
1153 | for (i = 0; i < entries->nr; i++) { |
1154 | const char *path = entries->items[i].string; | |
1155 | struct stage_data *e = entries->items[i].util; | |
1156 | if (!e->processed | |
8a2fce18 | 1157 | && !process_entry(o, path, e)) |
9047ebbc MV |
1158 | clean = 0; |
1159 | } | |
1160 | ||
1161 | string_list_clear(re_merge, 0); | |
1162 | string_list_clear(re_head, 0); | |
1163 | string_list_clear(entries, 1); | |
1164 | ||
1165 | } | |
1166 | else | |
1167 | clean = 1; | |
1168 | ||
b7fa51da | 1169 | if (o->call_depth) |
8a2fce18 | 1170 | *result = write_tree_from_memory(o); |
9047ebbc MV |
1171 | |
1172 | return clean; | |
1173 | } | |
1174 | ||
1175 | static struct commit_list *reverse_commit_list(struct commit_list *list) | |
1176 | { | |
1177 | struct commit_list *next = NULL, *current, *backup; | |
1178 | for (current = list; current; current = backup) { | |
1179 | backup = current->next; | |
1180 | current->next = next; | |
1181 | next = current; | |
1182 | } | |
1183 | return next; | |
1184 | } | |
1185 | ||
1186 | /* | |
1187 | * Merge the commits h1 and h2, return the resulting virtual | |
1188 | * commit object and a flag indicating the cleanness of the merge. | |
1189 | */ | |
8a2fce18 MV |
1190 | int merge_recursive(struct merge_options *o, |
1191 | struct commit *h1, | |
9047ebbc | 1192 | struct commit *h2, |
9047ebbc MV |
1193 | struct commit_list *ca, |
1194 | struct commit **result) | |
1195 | { | |
1196 | struct commit_list *iter; | |
1197 | struct commit *merged_common_ancestors; | |
1198 | struct tree *mrtree = mrtree; | |
1199 | int clean; | |
1200 | ||
8a2fce18 MV |
1201 | if (show(o, 4)) { |
1202 | output(o, 4, "Merging:"); | |
5033639c MV |
1203 | output_commit_title(o, h1); |
1204 | output_commit_title(o, h2); | |
9047ebbc MV |
1205 | } |
1206 | ||
1207 | if (!ca) { | |
1208 | ca = get_merge_bases(h1, h2, 1); | |
1209 | ca = reverse_commit_list(ca); | |
1210 | } | |
1211 | ||
8a2fce18 MV |
1212 | if (show(o, 5)) { |
1213 | output(o, 5, "found %u common ancestor(s):", commit_list_count(ca)); | |
9047ebbc | 1214 | for (iter = ca; iter; iter = iter->next) |
5033639c | 1215 | output_commit_title(o, iter->item); |
9047ebbc MV |
1216 | } |
1217 | ||
1218 | merged_common_ancestors = pop_commit(&ca); | |
1219 | if (merged_common_ancestors == NULL) { | |
1220 | /* if there is no common ancestor, make an empty tree */ | |
1221 | struct tree *tree = xcalloc(1, sizeof(struct tree)); | |
1222 | ||
1223 | tree->object.parsed = 1; | |
1224 | tree->object.type = OBJ_TREE; | |
1225 | pretend_sha1_file(NULL, 0, OBJ_TREE, tree->object.sha1); | |
1226 | merged_common_ancestors = make_virtual_commit(tree, "ancestor"); | |
1227 | } | |
1228 | ||
1229 | for (iter = ca; iter; iter = iter->next) { | |
8a2fce18 | 1230 | const char *saved_b1, *saved_b2; |
5033639c | 1231 | o->call_depth++; |
9047ebbc MV |
1232 | /* |
1233 | * When the merge fails, the result contains files | |
1234 | * with conflict markers. The cleanness flag is | |
1235 | * ignored, it was never actually used, as result of | |
1236 | * merge_trees has always overwritten it: the committed | |
1237 | * "conflicts" were already resolved. | |
1238 | */ | |
1239 | discard_cache(); | |
8a2fce18 MV |
1240 | saved_b1 = o->branch1; |
1241 | saved_b2 = o->branch2; | |
1242 | o->branch1 = "Temporary merge branch 1"; | |
1243 | o->branch2 = "Temporary merge branch 2"; | |
1244 | merge_recursive(o, merged_common_ancestors, iter->item, | |
1245 | NULL, &merged_common_ancestors); | |
1246 | o->branch1 = saved_b1; | |
1247 | o->branch2 = saved_b2; | |
5033639c | 1248 | o->call_depth--; |
9047ebbc MV |
1249 | |
1250 | if (!merged_common_ancestors) | |
1251 | die("merge returned no commit"); | |
1252 | } | |
1253 | ||
1254 | discard_cache(); | |
b7fa51da | 1255 | if (!o->call_depth) |
9047ebbc | 1256 | read_cache(); |
9047ebbc | 1257 | |
8a2fce18 MV |
1258 | clean = merge_trees(o, h1->tree, h2->tree, merged_common_ancestors->tree, |
1259 | &mrtree); | |
9047ebbc | 1260 | |
b7fa51da | 1261 | if (o->call_depth) { |
9047ebbc MV |
1262 | *result = make_virtual_commit(mrtree, "merged tree"); |
1263 | commit_list_insert(h1, &(*result)->parents); | |
1264 | commit_list_insert(h2, &(*result)->parents->next); | |
1265 | } | |
c7d84924 | 1266 | flush_output(o); |
9047ebbc MV |
1267 | return clean; |
1268 | } | |
1269 | ||
73118f89 SB |
1270 | static struct commit *get_ref(const unsigned char *sha1, const char *name) |
1271 | { | |
1272 | struct object *object; | |
1273 | ||
1274 | object = deref_tag(parse_object(sha1), name, strlen(name)); | |
1275 | if (!object) | |
1276 | return NULL; | |
1277 | if (object->type == OBJ_TREE) | |
1278 | return make_virtual_commit((struct tree*)object, name); | |
1279 | if (object->type != OBJ_COMMIT) | |
1280 | return NULL; | |
1281 | if (parse_commit((struct commit *)object)) | |
1282 | return NULL; | |
1283 | return (struct commit *)object; | |
1284 | } | |
1285 | ||
8a2fce18 MV |
1286 | int merge_recursive_generic(struct merge_options *o, |
1287 | const unsigned char *head, | |
1288 | const unsigned char *merge, | |
1289 | int num_base_list, | |
1290 | const unsigned char **base_list, | |
1291 | struct commit **result) | |
73118f89 SB |
1292 | { |
1293 | int clean, index_fd; | |
1294 | struct lock_file *lock = xcalloc(1, sizeof(struct lock_file)); | |
8a2fce18 MV |
1295 | struct commit *head_commit = get_ref(head, o->branch1); |
1296 | struct commit *next_commit = get_ref(merge, o->branch2); | |
73118f89 SB |
1297 | struct commit_list *ca = NULL; |
1298 | ||
1299 | if (base_list) { | |
1300 | int i; | |
8a2fce18 | 1301 | for (i = 0; i < num_base_list; ++i) { |
73118f89 | 1302 | struct commit *base; |
8a2fce18 | 1303 | if (!(base = get_ref(base_list[i], sha1_to_hex(base_list[i])))) |
73118f89 | 1304 | return error("Could not parse object '%s'", |
8a2fce18 | 1305 | sha1_to_hex(base_list[i])); |
73118f89 SB |
1306 | commit_list_insert(base, &ca); |
1307 | } | |
1308 | } | |
1309 | ||
1310 | index_fd = hold_locked_index(lock, 1); | |
8a2fce18 MV |
1311 | clean = merge_recursive(o, head_commit, next_commit, ca, |
1312 | result); | |
73118f89 SB |
1313 | if (active_cache_changed && |
1314 | (write_cache(index_fd, active_cache, active_nr) || | |
1315 | commit_locked_index(lock))) | |
1316 | return error("Unable to write index."); | |
1317 | ||
1318 | return clean ? 0 : 1; | |
1319 | } | |
1320 | ||
8a2fce18 | 1321 | static int merge_recursive_config(const char *var, const char *value, void *cb) |
9047ebbc | 1322 | { |
8a2fce18 | 1323 | struct merge_options *o = cb; |
9047ebbc | 1324 | if (!strcasecmp(var, "merge.verbosity")) { |
8a2fce18 | 1325 | o->verbosity = git_config_int(var, value); |
9047ebbc MV |
1326 | return 0; |
1327 | } | |
1328 | if (!strcasecmp(var, "diff.renamelimit")) { | |
8a2fce18 | 1329 | o->diff_rename_limit = git_config_int(var, value); |
9047ebbc MV |
1330 | return 0; |
1331 | } | |
1332 | if (!strcasecmp(var, "merge.renamelimit")) { | |
8a2fce18 | 1333 | o->merge_rename_limit = git_config_int(var, value); |
9047ebbc MV |
1334 | return 0; |
1335 | } | |
1336 | return git_default_config(var, value, cb); | |
1337 | } | |
1338 | ||
8a2fce18 | 1339 | void init_merge_options(struct merge_options *o) |
9047ebbc | 1340 | { |
8a2fce18 MV |
1341 | memset(o, 0, sizeof(struct merge_options)); |
1342 | o->verbosity = 2; | |
1343 | o->buffer_output = 1; | |
1344 | o->diff_rename_limit = -1; | |
1345 | o->merge_rename_limit = -1; | |
1346 | git_config(merge_recursive_config, o); | |
9047ebbc | 1347 | if (getenv("GIT_MERGE_VERBOSITY")) |
8a2fce18 | 1348 | o->verbosity = |
9047ebbc | 1349 | strtol(getenv("GIT_MERGE_VERBOSITY"), NULL, 10); |
8a2fce18 MV |
1350 | if (o->verbosity >= 5) |
1351 | o->buffer_output = 0; | |
c7d84924 | 1352 | strbuf_init(&o->obuf, 0); |
696ee23c MV |
1353 | memset(&o->current_file_set, 0, sizeof(struct string_list)); |
1354 | o->current_file_set.strdup_strings = 1; | |
1355 | memset(&o->current_directory_set, 0, sizeof(struct string_list)); | |
1356 | o->current_directory_set.strdup_strings = 1; | |
9047ebbc | 1357 | } |