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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" |
68d03e4a | 23 | #include "submodule.h" |
9047ebbc | 24 | |
bf0ab10f JK |
25 | static const char rename_limit_advice[] = |
26 | "inexact rename detection was skipped because there were too many\n" | |
27 | " files. You may want to set your merge.renamelimit variable to at least\n" | |
28 | " %d and retry this merge."; | |
29 | ||
85e51b78 JH |
30 | static struct tree *shift_tree_object(struct tree *one, struct tree *two, |
31 | const char *subtree_shift) | |
9047ebbc MV |
32 | { |
33 | unsigned char shifted[20]; | |
34 | ||
85e51b78 JH |
35 | if (!*subtree_shift) { |
36 | shift_tree(one->object.sha1, two->object.sha1, shifted, 0); | |
37 | } else { | |
38 | shift_tree_by(one->object.sha1, two->object.sha1, shifted, | |
39 | subtree_shift); | |
40 | } | |
9047ebbc MV |
41 | if (!hashcmp(two->object.sha1, shifted)) |
42 | return two; | |
43 | return lookup_tree(shifted); | |
44 | } | |
45 | ||
46 | /* | |
a6f63ae0 | 47 | * A virtual commit has (const char *)commit->util set to the name. |
9047ebbc MV |
48 | */ |
49 | ||
2af202be | 50 | static struct commit *make_virtual_commit(struct tree *tree, const char *comment) |
9047ebbc MV |
51 | { |
52 | struct commit *commit = xcalloc(1, sizeof(struct commit)); | |
9047ebbc MV |
53 | commit->tree = tree; |
54 | commit->util = (void*)comment; | |
9047ebbc MV |
55 | /* avoid warnings */ |
56 | commit->object.parsed = 1; | |
57 | return commit; | |
58 | } | |
59 | ||
60 | /* | |
61 | * Since we use get_tree_entry(), which does not put the read object into | |
62 | * the object pool, we cannot rely on a == b. | |
63 | */ | |
64 | static int sha_eq(const unsigned char *a, const unsigned char *b) | |
65 | { | |
66 | if (!a && !b) | |
67 | return 2; | |
68 | return a && b && hashcmp(a, b) == 0; | |
69 | } | |
70 | ||
25c39363 EN |
71 | enum rename_type { |
72 | RENAME_NORMAL = 0, | |
73 | RENAME_DELETE, | |
74 | RENAME_ONE_FILE_TO_TWO | |
75 | }; | |
76 | ||
77 | struct rename_df_conflict_info { | |
78 | enum rename_type rename_type; | |
79 | struct diff_filepair *pair1; | |
80 | struct diff_filepair *pair2; | |
81 | const char *branch1; | |
82 | const char *branch2; | |
83 | struct stage_data *dst_entry1; | |
84 | struct stage_data *dst_entry2; | |
85 | }; | |
86 | ||
9047ebbc MV |
87 | /* |
88 | * Since we want to write the index eventually, we cannot reuse the index | |
89 | * for these (temporary) data. | |
90 | */ | |
91 | struct stage_data | |
92 | { | |
93 | struct | |
94 | { | |
95 | unsigned mode; | |
96 | unsigned char sha[20]; | |
97 | } stages[4]; | |
25c39363 | 98 | struct rename_df_conflict_info *rename_df_conflict_info; |
9047ebbc MV |
99 | unsigned processed:1; |
100 | }; | |
101 | ||
25c39363 EN |
102 | static inline void setup_rename_df_conflict_info(enum rename_type rename_type, |
103 | struct diff_filepair *pair1, | |
104 | struct diff_filepair *pair2, | |
105 | const char *branch1, | |
106 | const char *branch2, | |
107 | struct stage_data *dst_entry1, | |
108 | struct stage_data *dst_entry2) | |
109 | { | |
110 | struct rename_df_conflict_info *ci = xcalloc(1, sizeof(struct rename_df_conflict_info)); | |
111 | ci->rename_type = rename_type; | |
112 | ci->pair1 = pair1; | |
113 | ci->branch1 = branch1; | |
114 | ci->branch2 = branch2; | |
115 | ||
116 | ci->dst_entry1 = dst_entry1; | |
117 | dst_entry1->rename_df_conflict_info = ci; | |
118 | dst_entry1->processed = 0; | |
119 | ||
120 | assert(!pair2 == !dst_entry2); | |
121 | if (dst_entry2) { | |
122 | ci->dst_entry2 = dst_entry2; | |
123 | ci->pair2 = pair2; | |
124 | dst_entry2->rename_df_conflict_info = ci; | |
125 | dst_entry2->processed = 0; | |
126 | } | |
127 | } | |
128 | ||
8a2fce18 | 129 | static int show(struct merge_options *o, int v) |
9047ebbc | 130 | { |
5033639c | 131 | return (!o->call_depth && o->verbosity >= v) || o->verbosity >= 5; |
9047ebbc MV |
132 | } |
133 | ||
c7d84924 | 134 | static void flush_output(struct merge_options *o) |
9047ebbc | 135 | { |
c7d84924 MV |
136 | if (o->obuf.len) { |
137 | fputs(o->obuf.buf, stdout); | |
138 | strbuf_reset(&o->obuf); | |
9047ebbc MV |
139 | } |
140 | } | |
141 | ||
28bea9e5 | 142 | __attribute__((format (printf, 3, 4))) |
8a2fce18 | 143 | static void output(struct merge_options *o, int v, const char *fmt, ...) |
9047ebbc MV |
144 | { |
145 | int len; | |
146 | va_list ap; | |
147 | ||
8a2fce18 | 148 | if (!show(o, v)) |
9047ebbc MV |
149 | return; |
150 | ||
c7d84924 MV |
151 | strbuf_grow(&o->obuf, o->call_depth * 2 + 2); |
152 | memset(o->obuf.buf + o->obuf.len, ' ', o->call_depth * 2); | |
153 | strbuf_setlen(&o->obuf, o->obuf.len + o->call_depth * 2); | |
9047ebbc MV |
154 | |
155 | va_start(ap, fmt); | |
c7d84924 | 156 | len = vsnprintf(o->obuf.buf + o->obuf.len, strbuf_avail(&o->obuf), fmt, ap); |
9047ebbc MV |
157 | va_end(ap); |
158 | ||
159 | if (len < 0) | |
160 | len = 0; | |
c7d84924 MV |
161 | if (len >= strbuf_avail(&o->obuf)) { |
162 | strbuf_grow(&o->obuf, len + 2); | |
9047ebbc | 163 | va_start(ap, fmt); |
c7d84924 | 164 | len = vsnprintf(o->obuf.buf + o->obuf.len, strbuf_avail(&o->obuf), fmt, ap); |
9047ebbc | 165 | va_end(ap); |
c7d84924 | 166 | if (len >= strbuf_avail(&o->obuf)) { |
9047ebbc MV |
167 | die("this should not happen, your snprintf is broken"); |
168 | } | |
169 | } | |
c7d84924 MV |
170 | strbuf_setlen(&o->obuf, o->obuf.len + len); |
171 | strbuf_add(&o->obuf, "\n", 1); | |
8a2fce18 | 172 | if (!o->buffer_output) |
c7d84924 | 173 | flush_output(o); |
9047ebbc MV |
174 | } |
175 | ||
5033639c | 176 | static void output_commit_title(struct merge_options *o, struct commit *commit) |
9047ebbc MV |
177 | { |
178 | int i; | |
c7d84924 | 179 | flush_output(o); |
5033639c | 180 | for (i = o->call_depth; i--;) |
9047ebbc MV |
181 | fputs(" ", stdout); |
182 | if (commit->util) | |
183 | printf("virtual %s\n", (char *)commit->util); | |
184 | else { | |
185 | printf("%s ", find_unique_abbrev(commit->object.sha1, DEFAULT_ABBREV)); | |
186 | if (parse_commit(commit) != 0) | |
187 | printf("(bad commit)\n"); | |
188 | else { | |
49b7120e CC |
189 | const char *title; |
190 | int len = find_commit_subject(commit->buffer, &title); | |
191 | if (len) | |
192 | printf("%.*s\n", len, title); | |
9047ebbc MV |
193 | } |
194 | } | |
195 | } | |
196 | ||
197 | static int add_cacheinfo(unsigned int mode, const unsigned char *sha1, | |
198 | const char *path, int stage, int refresh, int options) | |
199 | { | |
200 | struct cache_entry *ce; | |
201 | ce = make_cache_entry(mode, sha1 ? sha1 : null_sha1, path, stage, refresh); | |
202 | if (!ce) | |
203 | return error("addinfo_cache failed for path '%s'", path); | |
204 | return add_cache_entry(ce, options); | |
205 | } | |
206 | ||
9047ebbc MV |
207 | static void init_tree_desc_from_tree(struct tree_desc *desc, struct tree *tree) |
208 | { | |
209 | parse_tree(tree); | |
210 | init_tree_desc(desc, tree->buffer, tree->size); | |
211 | } | |
212 | ||
213 | static int git_merge_trees(int index_only, | |
214 | struct tree *common, | |
215 | struct tree *head, | |
216 | struct tree *merge) | |
217 | { | |
218 | int rc; | |
219 | struct tree_desc t[3]; | |
220 | struct unpack_trees_options opts; | |
221 | ||
222 | memset(&opts, 0, sizeof(opts)); | |
223 | if (index_only) | |
224 | opts.index_only = 1; | |
225 | else | |
226 | opts.update = 1; | |
227 | opts.merge = 1; | |
228 | opts.head_idx = 2; | |
229 | opts.fn = threeway_merge; | |
230 | opts.src_index = &the_index; | |
231 | opts.dst_index = &the_index; | |
e294030f | 232 | setup_unpack_trees_porcelain(&opts, "merge"); |
9047ebbc MV |
233 | |
234 | init_tree_desc_from_tree(t+0, common); | |
235 | init_tree_desc_from_tree(t+1, head); | |
236 | init_tree_desc_from_tree(t+2, merge); | |
237 | ||
238 | rc = unpack_trees(3, t, &opts); | |
239 | cache_tree_free(&active_cache_tree); | |
240 | return rc; | |
241 | } | |
242 | ||
8a2fce18 | 243 | struct tree *write_tree_from_memory(struct merge_options *o) |
9047ebbc MV |
244 | { |
245 | struct tree *result = NULL; | |
246 | ||
247 | if (unmerged_cache()) { | |
248 | int i; | |
19c6a4f8 | 249 | fprintf(stderr, "BUG: There are unmerged index entries:\n"); |
9047ebbc MV |
250 | for (i = 0; i < active_nr; i++) { |
251 | struct cache_entry *ce = active_cache[i]; | |
252 | if (ce_stage(ce)) | |
19c6a4f8 JH |
253 | fprintf(stderr, "BUG: %d %.*s", ce_stage(ce), |
254 | (int)ce_namelen(ce), ce->name); | |
9047ebbc | 255 | } |
19c6a4f8 | 256 | die("Bug in merge-recursive.c"); |
9047ebbc MV |
257 | } |
258 | ||
259 | if (!active_cache_tree) | |
260 | active_cache_tree = cache_tree(); | |
261 | ||
262 | if (!cache_tree_fully_valid(active_cache_tree) && | |
263 | cache_tree_update(active_cache_tree, | |
264 | active_cache, active_nr, 0, 0) < 0) | |
265 | die("error building trees"); | |
266 | ||
267 | result = lookup_tree(active_cache_tree->sha1); | |
268 | ||
269 | return result; | |
270 | } | |
271 | ||
272 | static int save_files_dirs(const unsigned char *sha1, | |
273 | const char *base, int baselen, const char *path, | |
274 | unsigned int mode, int stage, void *context) | |
275 | { | |
276 | int len = strlen(path); | |
277 | char *newpath = xmalloc(baselen + len + 1); | |
696ee23c MV |
278 | struct merge_options *o = context; |
279 | ||
9047ebbc MV |
280 | memcpy(newpath, base, baselen); |
281 | memcpy(newpath + baselen, path, len); | |
282 | newpath[baselen + len] = '\0'; | |
283 | ||
284 | if (S_ISDIR(mode)) | |
78a395d3 | 285 | string_list_insert(&o->current_directory_set, newpath); |
9047ebbc | 286 | else |
78a395d3 | 287 | string_list_insert(&o->current_file_set, newpath); |
9047ebbc MV |
288 | free(newpath); |
289 | ||
d3bee161 | 290 | return (S_ISDIR(mode) ? READ_TREE_RECURSIVE : 0); |
9047ebbc MV |
291 | } |
292 | ||
696ee23c | 293 | static int get_files_dirs(struct merge_options *o, struct tree *tree) |
9047ebbc MV |
294 | { |
295 | int n; | |
696ee23c | 296 | if (read_tree_recursive(tree, "", 0, 0, NULL, save_files_dirs, o)) |
9047ebbc | 297 | return 0; |
696ee23c | 298 | n = o->current_file_set.nr + o->current_directory_set.nr; |
9047ebbc MV |
299 | return n; |
300 | } | |
301 | ||
302 | /* | |
303 | * Returns an index_entry instance which doesn't have to correspond to | |
304 | * a real cache entry in Git's index. | |
305 | */ | |
306 | static struct stage_data *insert_stage_data(const char *path, | |
307 | struct tree *o, struct tree *a, struct tree *b, | |
308 | struct string_list *entries) | |
309 | { | |
310 | struct string_list_item *item; | |
311 | struct stage_data *e = xcalloc(1, sizeof(struct stage_data)); | |
312 | get_tree_entry(o->object.sha1, path, | |
313 | e->stages[1].sha, &e->stages[1].mode); | |
314 | get_tree_entry(a->object.sha1, path, | |
315 | e->stages[2].sha, &e->stages[2].mode); | |
316 | get_tree_entry(b->object.sha1, path, | |
317 | e->stages[3].sha, &e->stages[3].mode); | |
78a395d3 | 318 | item = string_list_insert(entries, path); |
9047ebbc MV |
319 | item->util = e; |
320 | return e; | |
321 | } | |
322 | ||
323 | /* | |
324 | * Create a dictionary mapping file names to stage_data objects. The | |
325 | * dictionary contains one entry for every path with a non-zero stage entry. | |
326 | */ | |
327 | static struct string_list *get_unmerged(void) | |
328 | { | |
329 | struct string_list *unmerged = xcalloc(1, sizeof(struct string_list)); | |
330 | int i; | |
331 | ||
332 | unmerged->strdup_strings = 1; | |
333 | ||
334 | for (i = 0; i < active_nr; i++) { | |
335 | struct string_list_item *item; | |
336 | struct stage_data *e; | |
337 | struct cache_entry *ce = active_cache[i]; | |
338 | if (!ce_stage(ce)) | |
339 | continue; | |
340 | ||
e8c8b713 | 341 | item = string_list_lookup(unmerged, ce->name); |
9047ebbc | 342 | if (!item) { |
78a395d3 | 343 | item = string_list_insert(unmerged, ce->name); |
9047ebbc MV |
344 | item->util = xcalloc(1, sizeof(struct stage_data)); |
345 | } | |
346 | e = item->util; | |
347 | e->stages[ce_stage(ce)].mode = ce->ce_mode; | |
348 | hashcpy(e->stages[ce_stage(ce)].sha, ce->sha1); | |
349 | } | |
350 | ||
351 | return unmerged; | |
352 | } | |
353 | ||
ef02b317 EN |
354 | static void make_room_for_directories_of_df_conflicts(struct merge_options *o, |
355 | struct string_list *entries) | |
356 | { | |
357 | /* If there are D/F conflicts, and the paths currently exist | |
358 | * in the working copy as a file, we want to remove them to | |
359 | * make room for the corresponding directory. Such paths will | |
360 | * later be processed in process_df_entry() at the end. If | |
361 | * the corresponding directory ends up being removed by the | |
362 | * merge, then the file will be reinstated at that time; | |
363 | * otherwise, if the file is not supposed to be removed by the | |
364 | * merge, the contents of the file will be placed in another | |
365 | * unique filename. | |
366 | * | |
367 | * NOTE: This function relies on the fact that entries for a | |
368 | * D/F conflict will appear adjacent in the index, with the | |
369 | * entries for the file appearing before entries for paths | |
370 | * below the corresponding directory. | |
371 | */ | |
372 | const char *last_file = NULL; | |
c8516500 | 373 | int last_len = 0; |
ef02b317 EN |
374 | struct stage_data *last_e; |
375 | int i; | |
376 | ||
377 | for (i = 0; i < entries->nr; i++) { | |
378 | const char *path = entries->items[i].string; | |
379 | int len = strlen(path); | |
380 | struct stage_data *e = entries->items[i].util; | |
381 | ||
382 | /* | |
383 | * Check if last_file & path correspond to a D/F conflict; | |
384 | * i.e. whether path is last_file+'/'+<something>. | |
385 | * If so, remove last_file to make room for path and friends. | |
386 | */ | |
387 | if (last_file && | |
388 | len > last_len && | |
389 | memcmp(path, last_file, last_len) == 0 && | |
390 | path[last_len] == '/') { | |
391 | output(o, 3, "Removing %s to make room for subdirectory; may re-add later.", last_file); | |
392 | unlink(last_file); | |
393 | } | |
394 | ||
395 | /* | |
396 | * Determine whether path could exist as a file in the | |
397 | * working directory as a possible D/F conflict. This | |
398 | * will only occur when it exists in stage 2 as a | |
399 | * file. | |
400 | */ | |
401 | if (S_ISREG(e->stages[2].mode) || S_ISLNK(e->stages[2].mode)) { | |
402 | last_file = path; | |
403 | last_len = len; | |
404 | last_e = e; | |
405 | } else { | |
406 | last_file = NULL; | |
407 | } | |
408 | } | |
409 | } | |
410 | ||
9047ebbc MV |
411 | struct rename |
412 | { | |
413 | struct diff_filepair *pair; | |
414 | struct stage_data *src_entry; | |
415 | struct stage_data *dst_entry; | |
416 | unsigned processed:1; | |
417 | }; | |
418 | ||
419 | /* | |
420 | * Get information of all renames which occurred between 'o_tree' and | |
421 | * 'tree'. We need the three trees in the merge ('o_tree', 'a_tree' and | |
422 | * 'b_tree') to be able to associate the correct cache entries with | |
423 | * the rename information. 'tree' is always equal to either a_tree or b_tree. | |
424 | */ | |
8a2fce18 MV |
425 | static struct string_list *get_renames(struct merge_options *o, |
426 | struct tree *tree, | |
427 | struct tree *o_tree, | |
428 | struct tree *a_tree, | |
429 | struct tree *b_tree, | |
430 | struct string_list *entries) | |
9047ebbc MV |
431 | { |
432 | int i; | |
433 | struct string_list *renames; | |
434 | struct diff_options opts; | |
435 | ||
436 | renames = xcalloc(1, sizeof(struct string_list)); | |
437 | diff_setup(&opts); | |
438 | DIFF_OPT_SET(&opts, RECURSIVE); | |
439 | opts.detect_rename = DIFF_DETECT_RENAME; | |
8a2fce18 MV |
440 | opts.rename_limit = o->merge_rename_limit >= 0 ? o->merge_rename_limit : |
441 | o->diff_rename_limit >= 0 ? o->diff_rename_limit : | |
9047ebbc | 442 | 500; |
10ae7526 | 443 | opts.rename_score = o->rename_score; |
9047ebbc MV |
444 | opts.output_format = DIFF_FORMAT_NO_OUTPUT; |
445 | if (diff_setup_done(&opts) < 0) | |
446 | die("diff setup failed"); | |
447 | diff_tree_sha1(o_tree->object.sha1, tree->object.sha1, "", &opts); | |
448 | diffcore_std(&opts); | |
bf0ab10f JK |
449 | if (opts.needed_rename_limit > o->needed_rename_limit) |
450 | o->needed_rename_limit = opts.needed_rename_limit; | |
9047ebbc MV |
451 | for (i = 0; i < diff_queued_diff.nr; ++i) { |
452 | struct string_list_item *item; | |
453 | struct rename *re; | |
454 | struct diff_filepair *pair = diff_queued_diff.queue[i]; | |
455 | if (pair->status != 'R') { | |
456 | diff_free_filepair(pair); | |
457 | continue; | |
458 | } | |
459 | re = xmalloc(sizeof(*re)); | |
460 | re->processed = 0; | |
461 | re->pair = pair; | |
e8c8b713 | 462 | item = string_list_lookup(entries, re->pair->one->path); |
9047ebbc MV |
463 | if (!item) |
464 | re->src_entry = insert_stage_data(re->pair->one->path, | |
465 | o_tree, a_tree, b_tree, entries); | |
466 | else | |
467 | re->src_entry = item->util; | |
468 | ||
e8c8b713 | 469 | item = string_list_lookup(entries, re->pair->two->path); |
9047ebbc MV |
470 | if (!item) |
471 | re->dst_entry = insert_stage_data(re->pair->two->path, | |
472 | o_tree, a_tree, b_tree, entries); | |
473 | else | |
474 | re->dst_entry = item->util; | |
78a395d3 | 475 | item = string_list_insert(renames, pair->one->path); |
9047ebbc MV |
476 | item->util = re; |
477 | } | |
478 | opts.output_format = DIFF_FORMAT_NO_OUTPUT; | |
479 | diff_queued_diff.nr = 0; | |
480 | diff_flush(&opts); | |
481 | return renames; | |
482 | } | |
483 | ||
2ff739f9 | 484 | static int update_stages_options(const char *path, struct diff_filespec *o, |
9047ebbc | 485 | struct diff_filespec *a, struct diff_filespec *b, |
2ff739f9 | 486 | int clear, int options) |
9047ebbc | 487 | { |
9047ebbc MV |
488 | if (clear) |
489 | if (remove_file_from_cache(path)) | |
490 | return -1; | |
491 | if (o) | |
492 | if (add_cacheinfo(o->mode, o->sha1, path, 1, 0, options)) | |
493 | return -1; | |
494 | if (a) | |
495 | if (add_cacheinfo(a->mode, a->sha1, path, 2, 0, options)) | |
496 | return -1; | |
497 | if (b) | |
498 | if (add_cacheinfo(b->mode, b->sha1, path, 3, 0, options)) | |
499 | return -1; | |
500 | return 0; | |
501 | } | |
502 | ||
2ff739f9 EN |
503 | static int update_stages(const char *path, struct diff_filespec *o, |
504 | struct diff_filespec *a, struct diff_filespec *b, | |
505 | int clear) | |
506 | { | |
507 | int options = ADD_CACHE_OK_TO_ADD | ADD_CACHE_OK_TO_REPLACE; | |
508 | return update_stages_options(path, o, a, b, clear, options); | |
509 | } | |
510 | ||
511 | static int update_stages_and_entry(const char *path, | |
512 | struct stage_data *entry, | |
513 | struct diff_filespec *o, | |
514 | struct diff_filespec *a, | |
515 | struct diff_filespec *b, | |
516 | int clear) | |
517 | { | |
518 | int options; | |
519 | ||
520 | entry->processed = 0; | |
521 | entry->stages[1].mode = o->mode; | |
522 | entry->stages[2].mode = a->mode; | |
523 | entry->stages[3].mode = b->mode; | |
524 | hashcpy(entry->stages[1].sha, o->sha1); | |
525 | hashcpy(entry->stages[2].sha, a->sha1); | |
526 | hashcpy(entry->stages[3].sha, b->sha1); | |
527 | options = ADD_CACHE_OK_TO_ADD | ADD_CACHE_SKIP_DFCHECK; | |
528 | return update_stages_options(path, o, a, b, clear, options); | |
529 | } | |
530 | ||
b7fa51da MV |
531 | static int remove_file(struct merge_options *o, int clean, |
532 | const char *path, int no_wd) | |
9047ebbc | 533 | { |
b7fa51da MV |
534 | int update_cache = o->call_depth || clean; |
535 | int update_working_directory = !o->call_depth && !no_wd; | |
9047ebbc MV |
536 | |
537 | if (update_cache) { | |
538 | if (remove_file_from_cache(path)) | |
539 | return -1; | |
540 | } | |
541 | if (update_working_directory) { | |
25755e84 | 542 | if (remove_path(path)) |
9047ebbc | 543 | return -1; |
9047ebbc MV |
544 | } |
545 | return 0; | |
546 | } | |
547 | ||
696ee23c | 548 | static char *unique_path(struct merge_options *o, const char *path, const char *branch) |
9047ebbc MV |
549 | { |
550 | char *newpath = xmalloc(strlen(path) + 1 + strlen(branch) + 8 + 1); | |
551 | int suffix = 0; | |
552 | struct stat st; | |
553 | char *p = newpath + strlen(path); | |
554 | strcpy(newpath, path); | |
555 | *(p++) = '~'; | |
556 | strcpy(p, branch); | |
557 | for (; *p; ++p) | |
558 | if ('/' == *p) | |
559 | *p = '_'; | |
696ee23c MV |
560 | while (string_list_has_string(&o->current_file_set, newpath) || |
561 | string_list_has_string(&o->current_directory_set, newpath) || | |
9047ebbc MV |
562 | lstat(newpath, &st) == 0) |
563 | sprintf(p, "_%d", suffix++); | |
564 | ||
78a395d3 | 565 | string_list_insert(&o->current_file_set, newpath); |
9047ebbc MV |
566 | return newpath; |
567 | } | |
568 | ||
569 | static void flush_buffer(int fd, const char *buf, unsigned long size) | |
570 | { | |
571 | while (size > 0) { | |
572 | long ret = write_in_full(fd, buf, size); | |
573 | if (ret < 0) { | |
574 | /* Ignore epipe */ | |
575 | if (errno == EPIPE) | |
576 | break; | |
d824cbba | 577 | die_errno("merge-recursive"); |
9047ebbc MV |
578 | } else if (!ret) { |
579 | die("merge-recursive: disk full?"); | |
580 | } | |
581 | size -= ret; | |
582 | buf += ret; | |
583 | } | |
584 | } | |
585 | ||
60c91181 JH |
586 | static int would_lose_untracked(const char *path) |
587 | { | |
588 | int pos = cache_name_pos(path, strlen(path)); | |
589 | ||
590 | if (pos < 0) | |
591 | pos = -1 - pos; | |
592 | while (pos < active_nr && | |
593 | !strcmp(path, active_cache[pos]->name)) { | |
594 | /* | |
595 | * If stage #0, it is definitely tracked. | |
596 | * If it has stage #2 then it was tracked | |
597 | * before this merge started. All other | |
598 | * cases the path was not tracked. | |
599 | */ | |
600 | switch (ce_stage(active_cache[pos])) { | |
601 | case 0: | |
602 | case 2: | |
603 | return 0; | |
604 | } | |
605 | pos++; | |
606 | } | |
607 | return file_exists(path); | |
608 | } | |
609 | ||
9047ebbc MV |
610 | static int make_room_for_path(const char *path) |
611 | { | |
612 | int status; | |
613 | const char *msg = "failed to create path '%s'%s"; | |
614 | ||
615 | status = safe_create_leading_directories_const(path); | |
616 | if (status) { | |
617 | if (status == -3) { | |
618 | /* something else exists */ | |
619 | error(msg, path, ": perhaps a D/F conflict?"); | |
620 | return -1; | |
621 | } | |
622 | die(msg, path, ""); | |
623 | } | |
624 | ||
60c91181 JH |
625 | /* |
626 | * Do not unlink a file in the work tree if we are not | |
627 | * tracking it. | |
628 | */ | |
629 | if (would_lose_untracked(path)) | |
630 | return error("refusing to lose untracked file at '%s'", | |
631 | path); | |
632 | ||
9047ebbc MV |
633 | /* Successful unlink is good.. */ |
634 | if (!unlink(path)) | |
635 | return 0; | |
636 | /* .. and so is no existing file */ | |
637 | if (errno == ENOENT) | |
638 | return 0; | |
639 | /* .. but not some other error (who really cares what?) */ | |
640 | return error(msg, path, ": perhaps a D/F conflict?"); | |
641 | } | |
642 | ||
b7fa51da MV |
643 | static void update_file_flags(struct merge_options *o, |
644 | const unsigned char *sha, | |
9047ebbc MV |
645 | unsigned mode, |
646 | const char *path, | |
647 | int update_cache, | |
648 | int update_wd) | |
649 | { | |
b7fa51da | 650 | if (o->call_depth) |
9047ebbc MV |
651 | update_wd = 0; |
652 | ||
653 | if (update_wd) { | |
654 | enum object_type type; | |
655 | void *buf; | |
656 | unsigned long size; | |
657 | ||
68d03e4a | 658 | if (S_ISGITLINK(mode)) { |
0c44c943 JH |
659 | /* |
660 | * We may later decide to recursively descend into | |
661 | * the submodule directory and update its index | |
662 | * and/or work tree, but we do not do that now. | |
663 | */ | |
68d03e4a | 664 | update_wd = 0; |
0c44c943 | 665 | goto update_index; |
68d03e4a | 666 | } |
9047ebbc MV |
667 | |
668 | buf = read_sha1_file(sha, &type, &size); | |
669 | if (!buf) | |
670 | die("cannot read object %s '%s'", sha1_to_hex(sha), path); | |
671 | if (type != OBJ_BLOB) | |
672 | die("blob expected for %s '%s'", sha1_to_hex(sha), path); | |
673 | if (S_ISREG(mode)) { | |
f285a2d7 | 674 | struct strbuf strbuf = STRBUF_INIT; |
9047ebbc MV |
675 | if (convert_to_working_tree(path, buf, size, &strbuf)) { |
676 | free(buf); | |
677 | size = strbuf.len; | |
678 | buf = strbuf_detach(&strbuf, NULL); | |
679 | } | |
680 | } | |
681 | ||
682 | if (make_room_for_path(path) < 0) { | |
683 | update_wd = 0; | |
684 | free(buf); | |
685 | goto update_index; | |
686 | } | |
687 | if (S_ISREG(mode) || (!has_symlinks && S_ISLNK(mode))) { | |
688 | int fd; | |
689 | if (mode & 0100) | |
690 | mode = 0777; | |
691 | else | |
692 | mode = 0666; | |
693 | fd = open(path, O_WRONLY | O_TRUNC | O_CREAT, mode); | |
694 | if (fd < 0) | |
d824cbba | 695 | die_errno("failed to open '%s'", path); |
9047ebbc MV |
696 | flush_buffer(fd, buf, size); |
697 | close(fd); | |
698 | } else if (S_ISLNK(mode)) { | |
699 | char *lnk = xmemdupz(buf, size); | |
700 | safe_create_leading_directories_const(path); | |
701 | unlink(path); | |
304dcf26 | 702 | if (symlink(lnk, path)) |
d824cbba | 703 | die_errno("failed to symlink '%s'", path); |
9047ebbc MV |
704 | free(lnk); |
705 | } else | |
706 | die("do not know what to do with %06o %s '%s'", | |
707 | mode, sha1_to_hex(sha), path); | |
708 | free(buf); | |
709 | } | |
710 | update_index: | |
711 | if (update_cache) | |
712 | add_cacheinfo(mode, sha, path, 0, update_wd, ADD_CACHE_OK_TO_ADD); | |
713 | } | |
714 | ||
b7fa51da MV |
715 | static void update_file(struct merge_options *o, |
716 | int clean, | |
9047ebbc MV |
717 | const unsigned char *sha, |
718 | unsigned mode, | |
719 | const char *path) | |
720 | { | |
b7fa51da | 721 | update_file_flags(o, sha, mode, path, o->call_depth || clean, !o->call_depth); |
9047ebbc MV |
722 | } |
723 | ||
724 | /* Low level file merging, update and removal */ | |
725 | ||
726 | struct merge_file_info | |
727 | { | |
728 | unsigned char sha[20]; | |
729 | unsigned mode; | |
730 | unsigned clean:1, | |
731 | merge:1; | |
732 | }; | |
733 | ||
b7fa51da MV |
734 | static int merge_3way(struct merge_options *o, |
735 | mmbuffer_t *result_buf, | |
736 | struct diff_filespec *one, | |
9047ebbc MV |
737 | struct diff_filespec *a, |
738 | struct diff_filespec *b, | |
739 | const char *branch1, | |
740 | const char *branch2) | |
741 | { | |
742 | mmfile_t orig, src1, src2; | |
712516bc | 743 | struct ll_merge_options ll_opts = {0}; |
4c5868f4 | 744 | char *base_name, *name1, *name2; |
9047ebbc | 745 | int merge_status; |
8cc5b290 | 746 | |
712516bc | 747 | ll_opts.renormalize = o->renormalize; |
58a1ece4 | 748 | ll_opts.xdl_opts = o->xdl_opts; |
712516bc JN |
749 | |
750 | if (o->call_depth) { | |
751 | ll_opts.virtual_ancestor = 1; | |
752 | ll_opts.variant = 0; | |
753 | } else { | |
8cc5b290 AP |
754 | switch (o->recursive_variant) { |
755 | case MERGE_RECURSIVE_OURS: | |
712516bc | 756 | ll_opts.variant = XDL_MERGE_FAVOR_OURS; |
8cc5b290 AP |
757 | break; |
758 | case MERGE_RECURSIVE_THEIRS: | |
712516bc | 759 | ll_opts.variant = XDL_MERGE_FAVOR_THEIRS; |
8cc5b290 AP |
760 | break; |
761 | default: | |
712516bc | 762 | ll_opts.variant = 0; |
8cc5b290 AP |
763 | break; |
764 | } | |
765 | } | |
9047ebbc | 766 | |
4c5868f4 JN |
767 | if (strcmp(a->path, b->path) || |
768 | (o->ancestor != NULL && strcmp(a->path, one->path) != 0)) { | |
769 | base_name = o->ancestor == NULL ? NULL : | |
770 | xstrdup(mkpath("%s:%s", o->ancestor, one->path)); | |
606475f3 MR |
771 | name1 = xstrdup(mkpath("%s:%s", branch1, a->path)); |
772 | name2 = xstrdup(mkpath("%s:%s", branch2, b->path)); | |
773 | } else { | |
4c5868f4 JN |
774 | base_name = o->ancestor == NULL ? NULL : |
775 | xstrdup(mkpath("%s", o->ancestor)); | |
606475f3 MR |
776 | name1 = xstrdup(mkpath("%s", branch1)); |
777 | name2 = xstrdup(mkpath("%s", branch2)); | |
778 | } | |
9047ebbc | 779 | |
06b65939 ML |
780 | read_mmblob(&orig, one->sha1); |
781 | read_mmblob(&src1, a->sha1); | |
782 | read_mmblob(&src2, b->sha1); | |
9047ebbc | 783 | |
4c5868f4 | 784 | merge_status = ll_merge(result_buf, a->path, &orig, base_name, |
712516bc | 785 | &src1, name1, &src2, name2, &ll_opts); |
9047ebbc MV |
786 | |
787 | free(name1); | |
788 | free(name2); | |
789 | free(orig.ptr); | |
790 | free(src1.ptr); | |
791 | free(src2.ptr); | |
792 | return merge_status; | |
793 | } | |
794 | ||
b7fa51da MV |
795 | static struct merge_file_info merge_file(struct merge_options *o, |
796 | struct diff_filespec *one, | |
797 | struct diff_filespec *a, | |
798 | struct diff_filespec *b, | |
799 | const char *branch1, | |
800 | const char *branch2) | |
9047ebbc MV |
801 | { |
802 | struct merge_file_info result; | |
803 | result.merge = 0; | |
804 | result.clean = 1; | |
805 | ||
806 | if ((S_IFMT & a->mode) != (S_IFMT & b->mode)) { | |
807 | result.clean = 0; | |
808 | if (S_ISREG(a->mode)) { | |
809 | result.mode = a->mode; | |
810 | hashcpy(result.sha, a->sha1); | |
811 | } else { | |
812 | result.mode = b->mode; | |
813 | hashcpy(result.sha, b->sha1); | |
814 | } | |
815 | } else { | |
b7fa51da | 816 | if (!sha_eq(a->sha1, one->sha1) && !sha_eq(b->sha1, one->sha1)) |
9047ebbc MV |
817 | result.merge = 1; |
818 | ||
819 | /* | |
820 | * Merge modes | |
821 | */ | |
b7fa51da | 822 | if (a->mode == b->mode || a->mode == one->mode) |
9047ebbc MV |
823 | result.mode = b->mode; |
824 | else { | |
825 | result.mode = a->mode; | |
b7fa51da | 826 | if (b->mode != one->mode) { |
9047ebbc MV |
827 | result.clean = 0; |
828 | result.merge = 1; | |
829 | } | |
830 | } | |
831 | ||
b7fa51da | 832 | if (sha_eq(a->sha1, b->sha1) || sha_eq(a->sha1, one->sha1)) |
9047ebbc | 833 | hashcpy(result.sha, b->sha1); |
b7fa51da | 834 | else if (sha_eq(b->sha1, one->sha1)) |
9047ebbc MV |
835 | hashcpy(result.sha, a->sha1); |
836 | else if (S_ISREG(a->mode)) { | |
837 | mmbuffer_t result_buf; | |
838 | int merge_status; | |
839 | ||
b7fa51da | 840 | merge_status = merge_3way(o, &result_buf, one, a, b, |
9047ebbc MV |
841 | branch1, branch2); |
842 | ||
843 | if ((merge_status < 0) || !result_buf.ptr) | |
844 | die("Failed to execute internal merge"); | |
845 | ||
846 | if (write_sha1_file(result_buf.ptr, result_buf.size, | |
847 | blob_type, result.sha)) | |
848 | die("Unable to add %s to database", | |
849 | a->path); | |
850 | ||
851 | free(result_buf.ptr); | |
852 | result.clean = (merge_status == 0); | |
853 | } else if (S_ISGITLINK(a->mode)) { | |
68d03e4a HV |
854 | result.clean = merge_submodule(result.sha, one->path, one->sha1, |
855 | a->sha1, b->sha1); | |
9047ebbc MV |
856 | } else if (S_ISLNK(a->mode)) { |
857 | hashcpy(result.sha, a->sha1); | |
858 | ||
859 | if (!sha_eq(a->sha1, b->sha1)) | |
860 | result.clean = 0; | |
861 | } else { | |
862 | die("unsupported object type in the tree"); | |
863 | } | |
864 | } | |
865 | ||
866 | return result; | |
867 | } | |
868 | ||
6ef2cb00 EN |
869 | static void conflict_rename_delete(struct merge_options *o, |
870 | struct diff_filepair *pair, | |
871 | const char *rename_branch, | |
872 | const char *other_branch) | |
9047ebbc | 873 | { |
6ef2cb00 | 874 | char *dest_name = pair->two->path; |
a0de2f6b EN |
875 | int df_conflict = 0; |
876 | struct stat st; | |
6ef2cb00 EN |
877 | |
878 | output(o, 1, "CONFLICT (rename/delete): Rename %s->%s in %s " | |
879 | "and deleted in %s", | |
880 | pair->one->path, pair->two->path, rename_branch, | |
881 | other_branch); | |
882 | if (!o->call_depth) | |
883 | update_stages(dest_name, NULL, | |
884 | rename_branch == o->branch1 ? pair->two : NULL, | |
885 | rename_branch == o->branch1 ? NULL : pair->two, | |
886 | 1); | |
a0de2f6b EN |
887 | if (lstat(dest_name, &st) == 0 && S_ISDIR(st.st_mode)) { |
888 | dest_name = unique_path(o, dest_name, rename_branch); | |
889 | df_conflict = 1; | |
890 | } | |
6ef2cb00 | 891 | update_file(o, 0, pair->two->sha1, pair->two->mode, dest_name); |
a0de2f6b EN |
892 | if (df_conflict) |
893 | free(dest_name); | |
6ef2cb00 EN |
894 | } |
895 | ||
09c01f85 | 896 | static void conflict_rename_rename_1to2(struct merge_options *o, |
36de1704 | 897 | struct diff_filepair *pair1, |
09c01f85 | 898 | const char *branch1, |
36de1704 | 899 | struct diff_filepair *pair2, |
09c01f85 | 900 | const char *branch2) |
9047ebbc | 901 | { |
09c01f85 | 902 | /* One file was renamed in both branches, but to different names. */ |
9047ebbc MV |
903 | char *del[2]; |
904 | int delp = 0; | |
36de1704 EN |
905 | const char *ren1_dst = pair1->two->path; |
906 | const char *ren2_dst = pair2->two->path; | |
9047ebbc MV |
907 | const char *dst_name1 = ren1_dst; |
908 | const char *dst_name2 = ren2_dst; | |
2adc7dcc EN |
909 | struct stat st; |
910 | if (lstat(ren1_dst, &st) == 0 && S_ISDIR(st.st_mode)) { | |
696ee23c | 911 | dst_name1 = del[delp++] = unique_path(o, ren1_dst, branch1); |
8a2fce18 | 912 | output(o, 1, "%s is a directory in %s adding as %s instead", |
9047ebbc | 913 | ren1_dst, branch2, dst_name1); |
9047ebbc | 914 | } |
2adc7dcc | 915 | if (lstat(ren2_dst, &st) == 0 && S_ISDIR(st.st_mode)) { |
696ee23c | 916 | dst_name2 = del[delp++] = unique_path(o, ren2_dst, branch2); |
8a2fce18 | 917 | output(o, 1, "%s is a directory in %s adding as %s instead", |
9047ebbc | 918 | ren2_dst, branch1, dst_name2); |
9047ebbc | 919 | } |
b7fa51da | 920 | if (o->call_depth) { |
9047ebbc MV |
921 | remove_file_from_cache(dst_name1); |
922 | remove_file_from_cache(dst_name2); | |
923 | /* | |
924 | * Uncomment to leave the conflicting names in the resulting tree | |
925 | * | |
36de1704 EN |
926 | * update_file(o, 0, pair1->two->sha1, pair1->two->mode, dst_name1); |
927 | * update_file(o, 0, pair2->two->sha1, pair2->two->mode, dst_name2); | |
9047ebbc MV |
928 | */ |
929 | } else { | |
07413c5a EN |
930 | update_stages(ren1_dst, NULL, pair1->two, NULL, 1); |
931 | update_stages(ren2_dst, NULL, NULL, pair2->two, 1); | |
932 | ||
933 | update_file(o, 0, pair1->two->sha1, pair1->two->mode, dst_name1); | |
934 | update_file(o, 0, pair2->two->sha1, pair2->two->mode, dst_name2); | |
9047ebbc MV |
935 | } |
936 | while (delp--) | |
937 | free(del[delp]); | |
938 | } | |
939 | ||
09c01f85 EN |
940 | static void conflict_rename_rename_2to1(struct merge_options *o, |
941 | struct rename *ren1, | |
942 | const char *branch1, | |
943 | struct rename *ren2, | |
944 | const char *branch2) | |
9047ebbc | 945 | { |
09c01f85 | 946 | /* Two files were renamed to the same thing. */ |
696ee23c MV |
947 | char *new_path1 = unique_path(o, ren1->pair->two->path, branch1); |
948 | char *new_path2 = unique_path(o, ren2->pair->two->path, branch2); | |
8a2fce18 | 949 | output(o, 1, "Renaming %s to %s and %s to %s instead", |
9047ebbc MV |
950 | ren1->pair->one->path, new_path1, |
951 | ren2->pair->one->path, new_path2); | |
b7fa51da MV |
952 | remove_file(o, 0, ren1->pair->two->path, 0); |
953 | update_file(o, 0, ren1->pair->two->sha1, ren1->pair->two->mode, new_path1); | |
954 | update_file(o, 0, ren2->pair->two->sha1, ren2->pair->two->mode, new_path2); | |
9047ebbc MV |
955 | free(new_path2); |
956 | free(new_path1); | |
957 | } | |
958 | ||
8a2fce18 MV |
959 | static int process_renames(struct merge_options *o, |
960 | struct string_list *a_renames, | |
961 | struct string_list *b_renames) | |
9047ebbc MV |
962 | { |
963 | int clean_merge = 1, i, j; | |
183113a5 TF |
964 | struct string_list a_by_dst = STRING_LIST_INIT_NODUP; |
965 | struct string_list b_by_dst = STRING_LIST_INIT_NODUP; | |
9047ebbc MV |
966 | const struct rename *sre; |
967 | ||
968 | for (i = 0; i < a_renames->nr; i++) { | |
969 | sre = a_renames->items[i].util; | |
78a395d3 | 970 | string_list_insert(&a_by_dst, sre->pair->two->path)->util |
9047ebbc MV |
971 | = sre->dst_entry; |
972 | } | |
973 | for (i = 0; i < b_renames->nr; i++) { | |
974 | sre = b_renames->items[i].util; | |
78a395d3 | 975 | string_list_insert(&b_by_dst, sre->pair->two->path)->util |
9047ebbc MV |
976 | = sre->dst_entry; |
977 | } | |
978 | ||
979 | for (i = 0, j = 0; i < a_renames->nr || j < b_renames->nr;) { | |
9047ebbc | 980 | char *src; |
8e24cbae | 981 | struct string_list *renames1, *renames2Dst; |
9047ebbc MV |
982 | struct rename *ren1 = NULL, *ren2 = NULL; |
983 | const char *branch1, *branch2; | |
984 | const char *ren1_src, *ren1_dst; | |
985 | ||
986 | if (i >= a_renames->nr) { | |
9047ebbc MV |
987 | ren2 = b_renames->items[j++].util; |
988 | } else if (j >= b_renames->nr) { | |
9047ebbc MV |
989 | ren1 = a_renames->items[i++].util; |
990 | } else { | |
8e24cbae BK |
991 | int compare = strcmp(a_renames->items[i].string, |
992 | b_renames->items[j].string); | |
9047ebbc MV |
993 | if (compare <= 0) |
994 | ren1 = a_renames->items[i++].util; | |
995 | if (compare >= 0) | |
996 | ren2 = b_renames->items[j++].util; | |
997 | } | |
998 | ||
999 | /* TODO: refactor, so that 1/2 are not needed */ | |
1000 | if (ren1) { | |
1001 | renames1 = a_renames; | |
9047ebbc | 1002 | renames2Dst = &b_by_dst; |
8a2fce18 MV |
1003 | branch1 = o->branch1; |
1004 | branch2 = o->branch2; | |
9047ebbc MV |
1005 | } else { |
1006 | struct rename *tmp; | |
1007 | renames1 = b_renames; | |
9047ebbc | 1008 | renames2Dst = &a_by_dst; |
8a2fce18 MV |
1009 | branch1 = o->branch2; |
1010 | branch2 = o->branch1; | |
9047ebbc MV |
1011 | tmp = ren2; |
1012 | ren2 = ren1; | |
1013 | ren1 = tmp; | |
1014 | } | |
1015 | src = ren1->pair->one->path; | |
1016 | ||
1017 | ren1->dst_entry->processed = 1; | |
1018 | ren1->src_entry->processed = 1; | |
1019 | ||
1020 | if (ren1->processed) | |
1021 | continue; | |
1022 | ren1->processed = 1; | |
1023 | ||
1024 | ren1_src = ren1->pair->one->path; | |
1025 | ren1_dst = ren1->pair->two->path; | |
1026 | ||
1027 | if (ren2) { | |
1028 | const char *ren2_src = ren2->pair->one->path; | |
1029 | const char *ren2_dst = ren2->pair->two->path; | |
1030 | /* Renamed in 1 and renamed in 2 */ | |
1031 | if (strcmp(ren1_src, ren2_src) != 0) | |
1032 | die("ren1.src != ren2.src"); | |
1033 | ren2->dst_entry->processed = 1; | |
1034 | ren2->processed = 1; | |
1035 | if (strcmp(ren1_dst, ren2_dst) != 0) { | |
07413c5a EN |
1036 | setup_rename_df_conflict_info(RENAME_ONE_FILE_TO_TWO, |
1037 | ren1->pair, | |
1038 | ren2->pair, | |
1039 | branch1, | |
1040 | branch2, | |
1041 | ren1->dst_entry, | |
1042 | ren2->dst_entry); | |
9047ebbc | 1043 | } else { |
b7fa51da | 1044 | remove_file(o, 1, ren1_src, 1); |
161cf7f9 EN |
1045 | update_stages_and_entry(ren1_dst, |
1046 | ren1->dst_entry, | |
1047 | ren1->pair->one, | |
1048 | ren1->pair->two, | |
1049 | ren2->pair->two, | |
1050 | 1 /* clear */); | |
9047ebbc MV |
1051 | } |
1052 | } else { | |
1053 | /* Renamed in 1, maybe changed in 2 */ | |
1054 | struct string_list_item *item; | |
1055 | /* we only use sha1 and mode of these */ | |
1056 | struct diff_filespec src_other, dst_other; | |
41d70bd6 | 1057 | int try_merge; |
9047ebbc | 1058 | |
41d70bd6 EN |
1059 | /* |
1060 | * unpack_trees loads entries from common-commit | |
1061 | * into stage 1, from head-commit into stage 2, and | |
1062 | * from merge-commit into stage 3. We keep track | |
1063 | * of which side corresponds to the rename. | |
1064 | */ | |
1065 | int renamed_stage = a_renames == renames1 ? 2 : 3; | |
1066 | int other_stage = a_renames == renames1 ? 3 : 2; | |
9047ebbc | 1067 | |
41d70bd6 | 1068 | remove_file(o, 1, ren1_src, o->call_depth || renamed_stage == 2); |
9047ebbc | 1069 | |
41d70bd6 EN |
1070 | hashcpy(src_other.sha1, ren1->src_entry->stages[other_stage].sha); |
1071 | src_other.mode = ren1->src_entry->stages[other_stage].mode; | |
1072 | hashcpy(dst_other.sha1, ren1->dst_entry->stages[other_stage].sha); | |
1073 | dst_other.mode = ren1->dst_entry->stages[other_stage].mode; | |
9047ebbc MV |
1074 | try_merge = 0; |
1075 | ||
86273e57 | 1076 | if (sha_eq(src_other.sha1, null_sha1)) { |
3b130adf EN |
1077 | if (string_list_has_string(&o->current_directory_set, ren1_dst)) { |
1078 | ren1->dst_entry->processed = 0; | |
1079 | setup_rename_df_conflict_info(RENAME_DELETE, | |
1080 | ren1->pair, | |
1081 | NULL, | |
1082 | branch1, | |
1083 | branch2, | |
1084 | ren1->dst_entry, | |
1085 | NULL); | |
3b130adf EN |
1086 | } else { |
1087 | clean_merge = 0; | |
1088 | conflict_rename_delete(o, ren1->pair, branch1, branch2); | |
1089 | } | |
d5af5105 SK |
1090 | } else if ((dst_other.mode == ren1->pair->two->mode) && |
1091 | sha_eq(dst_other.sha1, ren1->pair->two->sha1)) { | |
1092 | /* Added file on the other side | |
1093 | identical to the file being | |
1094 | renamed: clean merge */ | |
1095 | update_file(o, 1, ren1->pair->two->sha1, ren1->pair->two->mode, ren1_dst); | |
9047ebbc MV |
1096 | } else if (!sha_eq(dst_other.sha1, null_sha1)) { |
1097 | const char *new_path; | |
1098 | clean_merge = 0; | |
1099 | try_merge = 1; | |
8a2fce18 | 1100 | output(o, 1, "CONFLICT (rename/add): Rename %s->%s in %s. " |
9047ebbc MV |
1101 | "%s added in %s", |
1102 | ren1_src, ren1_dst, branch1, | |
1103 | ren1_dst, branch2); | |
c94736a2 JH |
1104 | if (o->call_depth) { |
1105 | struct merge_file_info mfi; | |
1106 | struct diff_filespec one, a, b; | |
1107 | ||
1108 | one.path = a.path = b.path = | |
1109 | (char *)ren1_dst; | |
1110 | hashcpy(one.sha1, null_sha1); | |
1111 | one.mode = 0; | |
1112 | hashcpy(a.sha1, ren1->pair->two->sha1); | |
1113 | a.mode = ren1->pair->two->mode; | |
1114 | hashcpy(b.sha1, dst_other.sha1); | |
1115 | b.mode = dst_other.mode; | |
1116 | mfi = merge_file(o, &one, &a, &b, | |
1117 | branch1, | |
1118 | branch2); | |
1119 | output(o, 1, "Adding merged %s", ren1_dst); | |
1120 | update_file(o, 0, | |
1121 | mfi.sha, | |
1122 | mfi.mode, | |
1123 | ren1_dst); | |
2a669c34 | 1124 | try_merge = 0; |
c94736a2 JH |
1125 | } else { |
1126 | new_path = unique_path(o, ren1_dst, branch2); | |
1127 | output(o, 1, "Adding as %s instead", new_path); | |
1128 | update_file(o, 0, dst_other.sha1, dst_other.mode, new_path); | |
1129 | } | |
e8c8b713 | 1130 | } else if ((item = string_list_lookup(renames2Dst, ren1_dst))) { |
9047ebbc MV |
1131 | ren2 = item->util; |
1132 | clean_merge = 0; | |
1133 | ren2->processed = 1; | |
8a2fce18 MV |
1134 | output(o, 1, "CONFLICT (rename/rename): " |
1135 | "Rename %s->%s in %s. " | |
9047ebbc MV |
1136 | "Rename %s->%s in %s", |
1137 | ren1_src, ren1_dst, branch1, | |
1138 | ren2->pair->one->path, ren2->pair->two->path, branch2); | |
09c01f85 | 1139 | conflict_rename_rename_2to1(o, ren1, branch1, ren2, branch2); |
9047ebbc MV |
1140 | } else |
1141 | try_merge = 1; | |
1142 | ||
1143 | if (try_merge) { | |
8a2fce18 | 1144 | struct diff_filespec *one, *a, *b; |
9047ebbc MV |
1145 | src_other.path = (char *)ren1_src; |
1146 | ||
8a2fce18 | 1147 | one = ren1->pair->one; |
9047ebbc MV |
1148 | if (a_renames == renames1) { |
1149 | a = ren1->pair->two; | |
1150 | b = &src_other; | |
1151 | } else { | |
1152 | b = ren1->pair->two; | |
1153 | a = &src_other; | |
1154 | } | |
882fd11a EN |
1155 | update_stages_and_entry(ren1_dst, ren1->dst_entry, one, a, b, 1); |
1156 | if (string_list_has_string(&o->current_directory_set, ren1_dst)) { | |
1157 | setup_rename_df_conflict_info(RENAME_NORMAL, | |
1158 | ren1->pair, | |
1159 | NULL, | |
1160 | branch1, | |
1161 | NULL, | |
1162 | ren1->dst_entry, | |
1163 | NULL); | |
9047ebbc MV |
1164 | } |
1165 | } | |
1166 | } | |
1167 | } | |
1168 | string_list_clear(&a_by_dst, 0); | |
1169 | string_list_clear(&b_by_dst, 0); | |
1170 | ||
1171 | return clean_merge; | |
1172 | } | |
1173 | ||
1174 | static unsigned char *stage_sha(const unsigned char *sha, unsigned mode) | |
1175 | { | |
1176 | return (is_null_sha1(sha) || mode == 0) ? NULL: (unsigned char *)sha; | |
1177 | } | |
1178 | ||
331a1838 EB |
1179 | static int read_sha1_strbuf(const unsigned char *sha1, struct strbuf *dst) |
1180 | { | |
1181 | void *buf; | |
1182 | enum object_type type; | |
1183 | unsigned long size; | |
1184 | buf = read_sha1_file(sha1, &type, &size); | |
1185 | if (!buf) | |
1186 | return error("cannot read object %s", sha1_to_hex(sha1)); | |
1187 | if (type != OBJ_BLOB) { | |
1188 | free(buf); | |
1189 | return error("object %s is not a blob", sha1_to_hex(sha1)); | |
1190 | } | |
1191 | strbuf_attach(dst, buf, size, size + 1); | |
1192 | return 0; | |
1193 | } | |
1194 | ||
1195 | static int blob_unchanged(const unsigned char *o_sha, | |
1196 | const unsigned char *a_sha, | |
3e7589b7 | 1197 | int renormalize, const char *path) |
331a1838 EB |
1198 | { |
1199 | struct strbuf o = STRBUF_INIT; | |
1200 | struct strbuf a = STRBUF_INIT; | |
1201 | int ret = 0; /* assume changed for safety */ | |
1202 | ||
1203 | if (sha_eq(o_sha, a_sha)) | |
1204 | return 1; | |
3e7589b7 | 1205 | if (!renormalize) |
331a1838 EB |
1206 | return 0; |
1207 | ||
1208 | assert(o_sha && a_sha); | |
1209 | if (read_sha1_strbuf(o_sha, &o) || read_sha1_strbuf(a_sha, &a)) | |
1210 | goto error_return; | |
1211 | /* | |
1212 | * Note: binary | is used so that both renormalizations are | |
1213 | * performed. Comparison can be skipped if both files are | |
1214 | * unchanged since their sha1s have already been compared. | |
1215 | */ | |
1216 | if (renormalize_buffer(path, o.buf, o.len, &o) | | |
1217 | renormalize_buffer(path, a.buf, o.len, &a)) | |
1218 | ret = (o.len == a.len && !memcmp(o.buf, a.buf, o.len)); | |
1219 | ||
1220 | error_return: | |
1221 | strbuf_release(&o); | |
1222 | strbuf_release(&a); | |
1223 | return ret; | |
1224 | } | |
1225 | ||
5e3ce663 EN |
1226 | static void handle_delete_modify(struct merge_options *o, |
1227 | const char *path, | |
84a08a47 | 1228 | const char *new_path, |
5e3ce663 EN |
1229 | unsigned char *a_sha, int a_mode, |
1230 | unsigned char *b_sha, int b_mode) | |
1231 | { | |
1232 | if (!a_sha) { | |
1233 | output(o, 1, "CONFLICT (delete/modify): %s deleted in %s " | |
84a08a47 | 1234 | "and modified in %s. Version %s of %s left in tree%s%s.", |
5e3ce663 | 1235 | path, o->branch1, |
84a08a47 EN |
1236 | o->branch2, o->branch2, path, |
1237 | path == new_path ? "" : " at ", | |
1238 | path == new_path ? "" : new_path); | |
1239 | update_file(o, 0, b_sha, b_mode, new_path); | |
5e3ce663 EN |
1240 | } else { |
1241 | output(o, 1, "CONFLICT (delete/modify): %s deleted in %s " | |
84a08a47 | 1242 | "and modified in %s. Version %s of %s left in tree%s%s.", |
5e3ce663 | 1243 | path, o->branch2, |
84a08a47 EN |
1244 | o->branch1, o->branch1, path, |
1245 | path == new_path ? "" : " at ", | |
1246 | path == new_path ? "" : new_path); | |
1247 | update_file(o, 0, a_sha, a_mode, new_path); | |
5e3ce663 EN |
1248 | } |
1249 | } | |
1250 | ||
0c4918d1 EN |
1251 | static int merge_content(struct merge_options *o, |
1252 | const char *path, | |
1253 | unsigned char *o_sha, int o_mode, | |
1254 | unsigned char *a_sha, int a_mode, | |
61b8bcae EN |
1255 | unsigned char *b_sha, int b_mode, |
1256 | const char *df_rename_conflict_branch) | |
0c4918d1 EN |
1257 | { |
1258 | const char *reason = "content"; | |
1259 | struct merge_file_info mfi; | |
1260 | struct diff_filespec one, a, b; | |
4ab9a157 EN |
1261 | struct stat st; |
1262 | unsigned df_conflict_remains = 0; | |
0c4918d1 EN |
1263 | |
1264 | if (!o_sha) { | |
1265 | reason = "add/add"; | |
1266 | o_sha = (unsigned char *)null_sha1; | |
1267 | } | |
1268 | one.path = a.path = b.path = (char *)path; | |
1269 | hashcpy(one.sha1, o_sha); | |
1270 | one.mode = o_mode; | |
1271 | hashcpy(a.sha1, a_sha); | |
1272 | a.mode = a_mode; | |
1273 | hashcpy(b.sha1, b_sha); | |
1274 | b.mode = b_mode; | |
1275 | ||
1276 | mfi = merge_file(o, &one, &a, &b, o->branch1, o->branch2); | |
4ab9a157 EN |
1277 | if (df_rename_conflict_branch && |
1278 | lstat(path, &st) == 0 && S_ISDIR(st.st_mode)) { | |
1279 | df_conflict_remains = 1; | |
1280 | } | |
1281 | ||
1282 | if (mfi.clean && !df_conflict_remains && | |
1283 | sha_eq(mfi.sha, a_sha) && mfi.mode == a.mode) | |
0c4918d1 EN |
1284 | output(o, 3, "Skipped %s (merged same as existing)", path); |
1285 | else | |
1286 | output(o, 2, "Auto-merging %s", path); | |
1287 | ||
1288 | if (!mfi.clean) { | |
1289 | if (S_ISGITLINK(mfi.mode)) | |
1290 | reason = "submodule"; | |
1291 | output(o, 1, "CONFLICT (%s): Merge conflict in %s", | |
1292 | reason, path); | |
1293 | } | |
1294 | ||
4ab9a157 EN |
1295 | if (df_conflict_remains) { |
1296 | const char *new_path; | |
1297 | update_file_flags(o, mfi.sha, mfi.mode, path, | |
1298 | o->call_depth || mfi.clean, 0); | |
1299 | new_path = unique_path(o, path, df_rename_conflict_branch); | |
1300 | mfi.clean = 0; | |
1301 | output(o, 1, "Adding as %s instead", new_path); | |
1302 | update_file_flags(o, mfi.sha, mfi.mode, new_path, 0, 1); | |
1303 | } else { | |
1304 | update_file(o, mfi.clean, mfi.sha, mfi.mode, path); | |
1305 | } | |
0c4918d1 EN |
1306 | return mfi.clean; |
1307 | ||
1308 | } | |
1309 | ||
9047ebbc | 1310 | /* Per entry merge function */ |
8a2fce18 MV |
1311 | static int process_entry(struct merge_options *o, |
1312 | const char *path, struct stage_data *entry) | |
9047ebbc MV |
1313 | { |
1314 | /* | |
1315 | printf("processing entry, clean cache: %s\n", index_only ? "yes": "no"); | |
1316 | print_index_entry("\tpath: ", entry); | |
1317 | */ | |
1318 | int clean_merge = 1; | |
1bc0ab7c | 1319 | int normalize = o->renormalize; |
9047ebbc MV |
1320 | unsigned o_mode = entry->stages[1].mode; |
1321 | unsigned a_mode = entry->stages[2].mode; | |
1322 | unsigned b_mode = entry->stages[3].mode; | |
1323 | unsigned char *o_sha = stage_sha(entry->stages[1].sha, o_mode); | |
1324 | unsigned char *a_sha = stage_sha(entry->stages[2].sha, a_mode); | |
1325 | unsigned char *b_sha = stage_sha(entry->stages[3].sha, b_mode); | |
1326 | ||
384c1668 EN |
1327 | if (entry->rename_df_conflict_info) |
1328 | return 1; /* Such cases are handled elsewhere. */ | |
1329 | ||
37348937 | 1330 | entry->processed = 1; |
9047ebbc MV |
1331 | if (o_sha && (!a_sha || !b_sha)) { |
1332 | /* Case A: Deleted in one */ | |
1333 | if ((!a_sha && !b_sha) || | |
3e7589b7 JN |
1334 | (!b_sha && blob_unchanged(o_sha, a_sha, normalize, path)) || |
1335 | (!a_sha && blob_unchanged(o_sha, b_sha, normalize, path))) { | |
9047ebbc MV |
1336 | /* Deleted in both or deleted in one and |
1337 | * unchanged in the other */ | |
1338 | if (a_sha) | |
8a2fce18 | 1339 | output(o, 2, "Removing %s", path); |
9047ebbc | 1340 | /* do not touch working file if it did not exist */ |
b7fa51da | 1341 | remove_file(o, 1, path, !a_sha); |
71f7ffcc EN |
1342 | } else if (string_list_has_string(&o->current_directory_set, |
1343 | path)) { | |
1344 | entry->processed = 0; | |
4c0c1810 | 1345 | return 1; /* Assume clean until processed */ |
9047ebbc MV |
1346 | } else { |
1347 | /* Deleted in one and changed in the other */ | |
1348 | clean_merge = 0; | |
84a08a47 | 1349 | handle_delete_modify(o, path, path, |
5e3ce663 | 1350 | a_sha, a_mode, b_sha, b_mode); |
9047ebbc MV |
1351 | } |
1352 | ||
1353 | } else if ((!o_sha && a_sha && !b_sha) || | |
1354 | (!o_sha && !a_sha && b_sha)) { | |
1355 | /* Case B: Added in one. */ | |
9047ebbc MV |
1356 | unsigned mode; |
1357 | const unsigned char *sha; | |
9047ebbc MV |
1358 | |
1359 | if (a_sha) { | |
9047ebbc MV |
1360 | mode = a_mode; |
1361 | sha = a_sha; | |
9047ebbc | 1362 | } else { |
9047ebbc MV |
1363 | mode = b_mode; |
1364 | sha = b_sha; | |
9047ebbc | 1365 | } |
696ee23c | 1366 | if (string_list_has_string(&o->current_directory_set, path)) { |
37348937 EN |
1367 | /* Handle D->F conflicts after all subfiles */ |
1368 | entry->processed = 0; | |
4c0c1810 | 1369 | return 1; /* Assume clean until processed */ |
9047ebbc | 1370 | } else { |
8a2fce18 | 1371 | output(o, 2, "Adding %s", path); |
b7fa51da | 1372 | update_file(o, 1, sha, mode, path); |
9047ebbc MV |
1373 | } |
1374 | } else if (a_sha && b_sha) { | |
1375 | /* Case C: Added in both (check for same permissions) and */ | |
1376 | /* case D: Modified in both, but differently. */ | |
0c4918d1 | 1377 | clean_merge = merge_content(o, path, |
61b8bcae EN |
1378 | o_sha, o_mode, a_sha, a_mode, b_sha, b_mode, |
1379 | NULL); | |
9047ebbc MV |
1380 | } else if (!o_sha && !a_sha && !b_sha) { |
1381 | /* | |
1382 | * this entry was deleted altogether. a_mode == 0 means | |
1383 | * we had that path and want to actively remove it. | |
1384 | */ | |
b7fa51da | 1385 | remove_file(o, 1, path, !a_mode); |
9047ebbc MV |
1386 | } else |
1387 | die("Fatal merge failure, shouldn't happen."); | |
1388 | ||
1389 | return clean_merge; | |
1390 | } | |
1391 | ||
37348937 | 1392 | /* |
9c0bbb50 EN |
1393 | * Per entry merge function for D/F (and/or rename) conflicts. In the |
1394 | * cases we can cleanly resolve D/F conflicts, process_entry() can | |
1395 | * clean out all the files below the directory for us. All D/F | |
1396 | * conflict cases must be handled here at the end to make sure any | |
1397 | * directories that can be cleaned out, are. | |
1398 | * | |
1399 | * Some rename conflicts may also be handled here that don't necessarily | |
1400 | * involve D/F conflicts, since the code to handle them is generic enough | |
1401 | * to handle those rename conflicts with or without D/F conflicts also | |
1402 | * being involved. | |
37348937 EN |
1403 | */ |
1404 | static int process_df_entry(struct merge_options *o, | |
9c0bbb50 | 1405 | const char *path, struct stage_data *entry) |
37348937 EN |
1406 | { |
1407 | int clean_merge = 1; | |
1408 | unsigned o_mode = entry->stages[1].mode; | |
1409 | unsigned a_mode = entry->stages[2].mode; | |
1410 | unsigned b_mode = entry->stages[3].mode; | |
1411 | unsigned char *o_sha = stage_sha(entry->stages[1].sha, o_mode); | |
1412 | unsigned char *a_sha = stage_sha(entry->stages[2].sha, a_mode); | |
1413 | unsigned char *b_sha = stage_sha(entry->stages[3].sha, b_mode); | |
37348937 EN |
1414 | struct stat st; |
1415 | ||
37348937 | 1416 | entry->processed = 1; |
9c0bbb50 | 1417 | if (entry->rename_df_conflict_info) { |
07413c5a EN |
1418 | struct rename_df_conflict_info *conflict_info = entry->rename_df_conflict_info; |
1419 | char *src; | |
1420 | switch (conflict_info->rename_type) { | |
882fd11a EN |
1421 | case RENAME_NORMAL: |
1422 | clean_merge = merge_content(o, path, | |
1423 | o_sha, o_mode, a_sha, a_mode, b_sha, b_mode, | |
1424 | conflict_info->branch1); | |
1425 | break; | |
3b130adf EN |
1426 | case RENAME_DELETE: |
1427 | clean_merge = 0; | |
1428 | conflict_rename_delete(o, conflict_info->pair1, | |
1429 | conflict_info->branch1, | |
1430 | conflict_info->branch2); | |
1431 | break; | |
07413c5a EN |
1432 | case RENAME_ONE_FILE_TO_TWO: |
1433 | src = conflict_info->pair1->one->path; | |
1434 | clean_merge = 0; | |
1435 | output(o, 1, "CONFLICT (rename/rename): " | |
1436 | "Rename \"%s\"->\"%s\" in branch \"%s\" " | |
1437 | "rename \"%s\"->\"%s\" in \"%s\"%s", | |
1438 | src, conflict_info->pair1->two->path, conflict_info->branch1, | |
1439 | src, conflict_info->pair2->two->path, conflict_info->branch2, | |
1440 | o->call_depth ? " (left unresolved)" : ""); | |
1441 | if (o->call_depth) { | |
1442 | remove_file_from_cache(src); | |
1443 | update_file(o, 0, conflict_info->pair1->one->sha1, | |
1444 | conflict_info->pair1->one->mode, src); | |
1445 | } | |
1446 | conflict_rename_rename_1to2(o, conflict_info->pair1, | |
1447 | conflict_info->branch1, | |
1448 | conflict_info->pair2, | |
1449 | conflict_info->branch2); | |
1450 | conflict_info->dst_entry2->processed = 1; | |
1451 | break; | |
1452 | default: | |
1453 | entry->processed = 0; | |
1454 | break; | |
1455 | } | |
71f7ffcc EN |
1456 | } else if (o_sha && (!a_sha || !b_sha)) { |
1457 | /* Modify/delete; deleted side may have put a directory in the way */ | |
84a08a47 EN |
1458 | const char *new_path = path; |
1459 | if (lstat(path, &st) == 0 && S_ISDIR(st.st_mode)) | |
1460 | new_path = unique_path(o, path, a_sha ? o->branch1 : o->branch2); | |
37348937 | 1461 | clean_merge = 0; |
84a08a47 | 1462 | handle_delete_modify(o, path, new_path, |
71f7ffcc | 1463 | a_sha, a_mode, b_sha, b_mode); |
9c0bbb50 EN |
1464 | } else if (!o_sha && !!a_sha != !!b_sha) { |
1465 | /* directory -> (directory, file) */ | |
1466 | const char *add_branch; | |
1467 | const char *other_branch; | |
1468 | unsigned mode; | |
1469 | const unsigned char *sha; | |
1470 | const char *conf; | |
37348937 | 1471 | |
9c0bbb50 EN |
1472 | if (a_sha) { |
1473 | add_branch = o->branch1; | |
1474 | other_branch = o->branch2; | |
1475 | mode = a_mode; | |
1476 | sha = a_sha; | |
1477 | conf = "file/directory"; | |
1478 | } else { | |
1479 | add_branch = o->branch2; | |
1480 | other_branch = o->branch1; | |
1481 | mode = b_mode; | |
1482 | sha = b_sha; | |
1483 | conf = "directory/file"; | |
1484 | } | |
1485 | if (lstat(path, &st) == 0 && S_ISDIR(st.st_mode)) { | |
1486 | const char *new_path = unique_path(o, path, add_branch); | |
1487 | clean_merge = 0; | |
1488 | output(o, 1, "CONFLICT (%s): There is a directory with name %s in %s. " | |
1489 | "Adding %s as %s", | |
1490 | conf, path, other_branch, path, new_path); | |
9c0bbb50 EN |
1491 | update_file(o, 0, sha, mode, new_path); |
1492 | } else { | |
1493 | output(o, 2, "Adding %s", path); | |
1494 | update_file(o, 1, sha, mode, path); | |
1495 | } | |
37348937 | 1496 | } else { |
9c0bbb50 EN |
1497 | entry->processed = 0; |
1498 | return 1; /* not handled; assume clean until processed */ | |
37348937 EN |
1499 | } |
1500 | ||
1501 | return clean_merge; | |
1502 | } | |
1503 | ||
8a2fce18 MV |
1504 | int merge_trees(struct merge_options *o, |
1505 | struct tree *head, | |
9047ebbc MV |
1506 | struct tree *merge, |
1507 | struct tree *common, | |
9047ebbc MV |
1508 | struct tree **result) |
1509 | { | |
1510 | int code, clean; | |
1511 | ||
85e51b78 JH |
1512 | if (o->subtree_shift) { |
1513 | merge = shift_tree_object(head, merge, o->subtree_shift); | |
1514 | common = shift_tree_object(head, common, o->subtree_shift); | |
9047ebbc MV |
1515 | } |
1516 | ||
1517 | if (sha_eq(common->object.sha1, merge->object.sha1)) { | |
5e5ffa09 | 1518 | output(o, 0, "Already up-to-date!"); |
9047ebbc MV |
1519 | *result = head; |
1520 | return 1; | |
1521 | } | |
1522 | ||
b7fa51da | 1523 | code = git_merge_trees(o->call_depth, common, head, merge); |
9047ebbc | 1524 | |
fadd069d JH |
1525 | if (code != 0) { |
1526 | if (show(o, 4) || o->call_depth) | |
1527 | die("merging of trees %s and %s failed", | |
1528 | sha1_to_hex(head->object.sha1), | |
1529 | sha1_to_hex(merge->object.sha1)); | |
1530 | else | |
1531 | exit(128); | |
1532 | } | |
9047ebbc MV |
1533 | |
1534 | if (unmerged_cache()) { | |
1535 | struct string_list *entries, *re_head, *re_merge; | |
1536 | int i; | |
696ee23c MV |
1537 | string_list_clear(&o->current_file_set, 1); |
1538 | string_list_clear(&o->current_directory_set, 1); | |
1539 | get_files_dirs(o, head); | |
1540 | get_files_dirs(o, merge); | |
9047ebbc MV |
1541 | |
1542 | entries = get_unmerged(); | |
ef02b317 | 1543 | make_room_for_directories_of_df_conflicts(o, entries); |
8a2fce18 MV |
1544 | re_head = get_renames(o, head, common, head, merge, entries); |
1545 | re_merge = get_renames(o, merge, common, head, merge, entries); | |
1546 | clean = process_renames(o, re_head, re_merge); | |
9047ebbc MV |
1547 | for (i = 0; i < entries->nr; i++) { |
1548 | const char *path = entries->items[i].string; | |
1549 | struct stage_data *e = entries->items[i].util; | |
1550 | if (!e->processed | |
8a2fce18 | 1551 | && !process_entry(o, path, e)) |
9047ebbc MV |
1552 | clean = 0; |
1553 | } | |
37348937 EN |
1554 | for (i = 0; i < entries->nr; i++) { |
1555 | const char *path = entries->items[i].string; | |
1556 | struct stage_data *e = entries->items[i].util; | |
1557 | if (!e->processed | |
1558 | && !process_df_entry(o, path, e)) | |
1559 | clean = 0; | |
1560 | } | |
7edba4c4 JH |
1561 | for (i = 0; i < entries->nr; i++) { |
1562 | struct stage_data *e = entries->items[i].util; | |
1563 | if (!e->processed) | |
1564 | die("Unprocessed path??? %s", | |
1565 | entries->items[i].string); | |
1566 | } | |
9047ebbc MV |
1567 | |
1568 | string_list_clear(re_merge, 0); | |
1569 | string_list_clear(re_head, 0); | |
1570 | string_list_clear(entries, 1); | |
1571 | ||
1572 | } | |
1573 | else | |
1574 | clean = 1; | |
1575 | ||
b7fa51da | 1576 | if (o->call_depth) |
8a2fce18 | 1577 | *result = write_tree_from_memory(o); |
9047ebbc MV |
1578 | |
1579 | return clean; | |
1580 | } | |
1581 | ||
1582 | static struct commit_list *reverse_commit_list(struct commit_list *list) | |
1583 | { | |
1584 | struct commit_list *next = NULL, *current, *backup; | |
1585 | for (current = list; current; current = backup) { | |
1586 | backup = current->next; | |
1587 | current->next = next; | |
1588 | next = current; | |
1589 | } | |
1590 | return next; | |
1591 | } | |
1592 | ||
1593 | /* | |
1594 | * Merge the commits h1 and h2, return the resulting virtual | |
1595 | * commit object and a flag indicating the cleanness of the merge. | |
1596 | */ | |
8a2fce18 MV |
1597 | int merge_recursive(struct merge_options *o, |
1598 | struct commit *h1, | |
9047ebbc | 1599 | struct commit *h2, |
9047ebbc MV |
1600 | struct commit_list *ca, |
1601 | struct commit **result) | |
1602 | { | |
1603 | struct commit_list *iter; | |
1604 | struct commit *merged_common_ancestors; | |
1605 | struct tree *mrtree = mrtree; | |
1606 | int clean; | |
1607 | ||
8a2fce18 MV |
1608 | if (show(o, 4)) { |
1609 | output(o, 4, "Merging:"); | |
5033639c MV |
1610 | output_commit_title(o, h1); |
1611 | output_commit_title(o, h2); | |
9047ebbc MV |
1612 | } |
1613 | ||
1614 | if (!ca) { | |
1615 | ca = get_merge_bases(h1, h2, 1); | |
1616 | ca = reverse_commit_list(ca); | |
1617 | } | |
1618 | ||
8a2fce18 MV |
1619 | if (show(o, 5)) { |
1620 | output(o, 5, "found %u common ancestor(s):", commit_list_count(ca)); | |
9047ebbc | 1621 | for (iter = ca; iter; iter = iter->next) |
5033639c | 1622 | output_commit_title(o, iter->item); |
9047ebbc MV |
1623 | } |
1624 | ||
1625 | merged_common_ancestors = pop_commit(&ca); | |
1626 | if (merged_common_ancestors == NULL) { | |
1627 | /* if there is no common ancestor, make an empty tree */ | |
1628 | struct tree *tree = xcalloc(1, sizeof(struct tree)); | |
1629 | ||
1630 | tree->object.parsed = 1; | |
1631 | tree->object.type = OBJ_TREE; | |
1632 | pretend_sha1_file(NULL, 0, OBJ_TREE, tree->object.sha1); | |
1633 | merged_common_ancestors = make_virtual_commit(tree, "ancestor"); | |
1634 | } | |
1635 | ||
1636 | for (iter = ca; iter; iter = iter->next) { | |
8a2fce18 | 1637 | const char *saved_b1, *saved_b2; |
5033639c | 1638 | o->call_depth++; |
9047ebbc MV |
1639 | /* |
1640 | * When the merge fails, the result contains files | |
1641 | * with conflict markers. The cleanness flag is | |
1642 | * ignored, it was never actually used, as result of | |
1643 | * merge_trees has always overwritten it: the committed | |
1644 | * "conflicts" were already resolved. | |
1645 | */ | |
1646 | discard_cache(); | |
8a2fce18 MV |
1647 | saved_b1 = o->branch1; |
1648 | saved_b2 = o->branch2; | |
1649 | o->branch1 = "Temporary merge branch 1"; | |
1650 | o->branch2 = "Temporary merge branch 2"; | |
1651 | merge_recursive(o, merged_common_ancestors, iter->item, | |
1652 | NULL, &merged_common_ancestors); | |
1653 | o->branch1 = saved_b1; | |
1654 | o->branch2 = saved_b2; | |
5033639c | 1655 | o->call_depth--; |
9047ebbc MV |
1656 | |
1657 | if (!merged_common_ancestors) | |
1658 | die("merge returned no commit"); | |
1659 | } | |
1660 | ||
1661 | discard_cache(); | |
b7fa51da | 1662 | if (!o->call_depth) |
9047ebbc | 1663 | read_cache(); |
9047ebbc | 1664 | |
7ca56aa0 | 1665 | o->ancestor = "merged common ancestors"; |
8a2fce18 MV |
1666 | clean = merge_trees(o, h1->tree, h2->tree, merged_common_ancestors->tree, |
1667 | &mrtree); | |
9047ebbc | 1668 | |
b7fa51da | 1669 | if (o->call_depth) { |
9047ebbc MV |
1670 | *result = make_virtual_commit(mrtree, "merged tree"); |
1671 | commit_list_insert(h1, &(*result)->parents); | |
1672 | commit_list_insert(h2, &(*result)->parents->next); | |
1673 | } | |
c7d84924 | 1674 | flush_output(o); |
bf0ab10f JK |
1675 | if (o->needed_rename_limit) |
1676 | warning(rename_limit_advice, o->needed_rename_limit); | |
9047ebbc MV |
1677 | return clean; |
1678 | } | |
1679 | ||
73118f89 SB |
1680 | static struct commit *get_ref(const unsigned char *sha1, const char *name) |
1681 | { | |
1682 | struct object *object; | |
1683 | ||
1684 | object = deref_tag(parse_object(sha1), name, strlen(name)); | |
1685 | if (!object) | |
1686 | return NULL; | |
1687 | if (object->type == OBJ_TREE) | |
1688 | return make_virtual_commit((struct tree*)object, name); | |
1689 | if (object->type != OBJ_COMMIT) | |
1690 | return NULL; | |
1691 | if (parse_commit((struct commit *)object)) | |
1692 | return NULL; | |
1693 | return (struct commit *)object; | |
1694 | } | |
1695 | ||
8a2fce18 MV |
1696 | int merge_recursive_generic(struct merge_options *o, |
1697 | const unsigned char *head, | |
1698 | const unsigned char *merge, | |
1699 | int num_base_list, | |
1700 | const unsigned char **base_list, | |
1701 | struct commit **result) | |
73118f89 SB |
1702 | { |
1703 | int clean, index_fd; | |
1704 | struct lock_file *lock = xcalloc(1, sizeof(struct lock_file)); | |
8a2fce18 MV |
1705 | struct commit *head_commit = get_ref(head, o->branch1); |
1706 | struct commit *next_commit = get_ref(merge, o->branch2); | |
73118f89 SB |
1707 | struct commit_list *ca = NULL; |
1708 | ||
1709 | if (base_list) { | |
1710 | int i; | |
8a2fce18 | 1711 | for (i = 0; i < num_base_list; ++i) { |
73118f89 | 1712 | struct commit *base; |
8a2fce18 | 1713 | if (!(base = get_ref(base_list[i], sha1_to_hex(base_list[i])))) |
73118f89 | 1714 | return error("Could not parse object '%s'", |
8a2fce18 | 1715 | sha1_to_hex(base_list[i])); |
73118f89 SB |
1716 | commit_list_insert(base, &ca); |
1717 | } | |
1718 | } | |
1719 | ||
1720 | index_fd = hold_locked_index(lock, 1); | |
8a2fce18 MV |
1721 | clean = merge_recursive(o, head_commit, next_commit, ca, |
1722 | result); | |
73118f89 SB |
1723 | if (active_cache_changed && |
1724 | (write_cache(index_fd, active_cache, active_nr) || | |
1725 | commit_locked_index(lock))) | |
1726 | return error("Unable to write index."); | |
1727 | ||
1728 | return clean ? 0 : 1; | |
1729 | } | |
1730 | ||
8a2fce18 | 1731 | static int merge_recursive_config(const char *var, const char *value, void *cb) |
9047ebbc | 1732 | { |
8a2fce18 | 1733 | struct merge_options *o = cb; |
9047ebbc | 1734 | if (!strcasecmp(var, "merge.verbosity")) { |
8a2fce18 | 1735 | o->verbosity = git_config_int(var, value); |
9047ebbc MV |
1736 | return 0; |
1737 | } | |
1738 | if (!strcasecmp(var, "diff.renamelimit")) { | |
8a2fce18 | 1739 | o->diff_rename_limit = git_config_int(var, value); |
9047ebbc MV |
1740 | return 0; |
1741 | } | |
1742 | if (!strcasecmp(var, "merge.renamelimit")) { | |
8a2fce18 | 1743 | o->merge_rename_limit = git_config_int(var, value); |
9047ebbc MV |
1744 | return 0; |
1745 | } | |
e137a892 | 1746 | return git_xmerge_config(var, value, cb); |
9047ebbc MV |
1747 | } |
1748 | ||
8a2fce18 | 1749 | void init_merge_options(struct merge_options *o) |
9047ebbc | 1750 | { |
8a2fce18 MV |
1751 | memset(o, 0, sizeof(struct merge_options)); |
1752 | o->verbosity = 2; | |
1753 | o->buffer_output = 1; | |
1754 | o->diff_rename_limit = -1; | |
1755 | o->merge_rename_limit = -1; | |
7610fa57 | 1756 | o->renormalize = 0; |
8a2fce18 | 1757 | git_config(merge_recursive_config, o); |
9047ebbc | 1758 | if (getenv("GIT_MERGE_VERBOSITY")) |
8a2fce18 | 1759 | o->verbosity = |
9047ebbc | 1760 | strtol(getenv("GIT_MERGE_VERBOSITY"), NULL, 10); |
8a2fce18 MV |
1761 | if (o->verbosity >= 5) |
1762 | o->buffer_output = 0; | |
c7d84924 | 1763 | strbuf_init(&o->obuf, 0); |
696ee23c MV |
1764 | memset(&o->current_file_set, 0, sizeof(struct string_list)); |
1765 | o->current_file_set.strdup_strings = 1; | |
1766 | memset(&o->current_directory_set, 0, sizeof(struct string_list)); | |
1767 | o->current_directory_set.strdup_strings = 1; | |
9047ebbc | 1768 | } |
635a7bb1 JN |
1769 | |
1770 | int parse_merge_opt(struct merge_options *o, const char *s) | |
1771 | { | |
1772 | if (!s || !*s) | |
1773 | return -1; | |
1774 | if (!strcmp(s, "ours")) | |
1775 | o->recursive_variant = MERGE_RECURSIVE_OURS; | |
1776 | else if (!strcmp(s, "theirs")) | |
1777 | o->recursive_variant = MERGE_RECURSIVE_THEIRS; | |
1778 | else if (!strcmp(s, "subtree")) | |
1779 | o->subtree_shift = ""; | |
1780 | else if (!prefixcmp(s, "subtree=")) | |
1781 | o->subtree_shift = s + strlen("subtree="); | |
58a1ece4 JF |
1782 | else if (!strcmp(s, "patience")) |
1783 | o->xdl_opts |= XDF_PATIENCE_DIFF; | |
4e5dd044 JF |
1784 | else if (!strcmp(s, "ignore-space-change")) |
1785 | o->xdl_opts |= XDF_IGNORE_WHITESPACE_CHANGE; | |
1786 | else if (!strcmp(s, "ignore-all-space")) | |
1787 | o->xdl_opts |= XDF_IGNORE_WHITESPACE; | |
1788 | else if (!strcmp(s, "ignore-space-at-eol")) | |
1789 | o->xdl_opts |= XDF_IGNORE_WHITESPACE_AT_EOL; | |
635a7bb1 JN |
1790 | else if (!strcmp(s, "renormalize")) |
1791 | o->renormalize = 1; | |
1792 | else if (!strcmp(s, "no-renormalize")) | |
1793 | o->renormalize = 0; | |
10ae7526 KB |
1794 | else if (!prefixcmp(s, "rename-threshold=")) { |
1795 | const char *score = s + strlen("rename-threshold="); | |
1796 | if ((o->rename_score = parse_rename_score(&score)) == -1 || *score != 0) | |
1797 | return -1; | |
1798 | } | |
635a7bb1 JN |
1799 | else |
1800 | return -1; | |
1801 | return 0; | |
1802 | } |