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