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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 | |
85e51b78 JH |
25 | static struct tree *shift_tree_object(struct tree *one, struct tree *two, |
26 | const char *subtree_shift) | |
9047ebbc MV |
27 | { |
28 | unsigned char shifted[20]; | |
29 | ||
85e51b78 JH |
30 | if (!*subtree_shift) { |
31 | shift_tree(one->object.sha1, two->object.sha1, shifted, 0); | |
32 | } else { | |
33 | shift_tree_by(one->object.sha1, two->object.sha1, shifted, | |
34 | subtree_shift); | |
35 | } | |
9047ebbc MV |
36 | if (!hashcmp(two->object.sha1, shifted)) |
37 | return two; | |
38 | return lookup_tree(shifted); | |
39 | } | |
40 | ||
2af202be | 41 | static struct commit *make_virtual_commit(struct tree *tree, const char *comment) |
9047ebbc MV |
42 | { |
43 | struct commit *commit = xcalloc(1, sizeof(struct commit)); | |
ae8e4c9c JH |
44 | struct merge_remote_desc *desc = xmalloc(sizeof(*desc)); |
45 | ||
46 | desc->name = comment; | |
47 | desc->obj = (struct object *)commit; | |
9047ebbc | 48 | commit->tree = tree; |
ae8e4c9c | 49 | commit->util = desc; |
9047ebbc MV |
50 | commit->object.parsed = 1; |
51 | return commit; | |
52 | } | |
53 | ||
54 | /* | |
55 | * Since we use get_tree_entry(), which does not put the read object into | |
56 | * the object pool, we cannot rely on a == b. | |
57 | */ | |
58 | static int sha_eq(const unsigned char *a, const unsigned char *b) | |
59 | { | |
60 | if (!a && !b) | |
61 | return 2; | |
62 | return a && b && hashcmp(a, b) == 0; | |
63 | } | |
64 | ||
25c39363 EN |
65 | enum rename_type { |
66 | RENAME_NORMAL = 0, | |
67 | RENAME_DELETE, | |
4f66dade | 68 | RENAME_ONE_FILE_TO_ONE, |
461f5041 EN |
69 | RENAME_ONE_FILE_TO_TWO, |
70 | RENAME_TWO_FILES_TO_ONE | |
25c39363 EN |
71 | }; |
72 | ||
4f66dade | 73 | struct rename_conflict_info { |
25c39363 EN |
74 | enum rename_type rename_type; |
75 | struct diff_filepair *pair1; | |
76 | struct diff_filepair *pair2; | |
77 | const char *branch1; | |
78 | const char *branch2; | |
79 | struct stage_data *dst_entry1; | |
80 | struct stage_data *dst_entry2; | |
232c635f EN |
81 | struct diff_filespec ren1_other; |
82 | struct diff_filespec ren2_other; | |
25c39363 EN |
83 | }; |
84 | ||
9047ebbc MV |
85 | /* |
86 | * Since we want to write the index eventually, we cannot reuse the index | |
87 | * for these (temporary) data. | |
88 | */ | |
9cba13ca JN |
89 | struct stage_data { |
90 | struct { | |
9047ebbc MV |
91 | unsigned mode; |
92 | unsigned char sha[20]; | |
93 | } stages[4]; | |
4f66dade | 94 | struct rename_conflict_info *rename_conflict_info; |
9047ebbc MV |
95 | unsigned processed:1; |
96 | }; | |
97 | ||
4f66dade EN |
98 | static inline void setup_rename_conflict_info(enum rename_type rename_type, |
99 | struct diff_filepair *pair1, | |
100 | struct diff_filepair *pair2, | |
101 | const char *branch1, | |
102 | const char *branch2, | |
103 | struct stage_data *dst_entry1, | |
232c635f EN |
104 | struct stage_data *dst_entry2, |
105 | struct merge_options *o, | |
106 | struct stage_data *src_entry1, | |
107 | struct stage_data *src_entry2) | |
25c39363 | 108 | { |
4f66dade | 109 | struct rename_conflict_info *ci = xcalloc(1, sizeof(struct rename_conflict_info)); |
25c39363 EN |
110 | ci->rename_type = rename_type; |
111 | ci->pair1 = pair1; | |
112 | ci->branch1 = branch1; | |
113 | ci->branch2 = branch2; | |
114 | ||
115 | ci->dst_entry1 = dst_entry1; | |
4f66dade | 116 | dst_entry1->rename_conflict_info = ci; |
25c39363 EN |
117 | dst_entry1->processed = 0; |
118 | ||
119 | assert(!pair2 == !dst_entry2); | |
120 | if (dst_entry2) { | |
121 | ci->dst_entry2 = dst_entry2; | |
122 | ci->pair2 = pair2; | |
4f66dade | 123 | dst_entry2->rename_conflict_info = ci; |
25c39363 | 124 | } |
232c635f EN |
125 | |
126 | if (rename_type == RENAME_TWO_FILES_TO_ONE) { | |
127 | /* | |
128 | * For each rename, there could have been | |
129 | * modifications on the side of history where that | |
130 | * file was not renamed. | |
131 | */ | |
132 | int ostage1 = o->branch1 == branch1 ? 3 : 2; | |
133 | int ostage2 = ostage1 ^ 1; | |
134 | ||
135 | ci->ren1_other.path = pair1->one->path; | |
136 | hashcpy(ci->ren1_other.sha1, src_entry1->stages[ostage1].sha); | |
137 | ci->ren1_other.mode = src_entry1->stages[ostage1].mode; | |
138 | ||
139 | ci->ren2_other.path = pair2->one->path; | |
140 | hashcpy(ci->ren2_other.sha1, src_entry2->stages[ostage2].sha); | |
141 | ci->ren2_other.mode = src_entry2->stages[ostage2].mode; | |
25c39363 EN |
142 | } |
143 | } | |
144 | ||
8a2fce18 | 145 | static int show(struct merge_options *o, int v) |
9047ebbc | 146 | { |
5033639c | 147 | return (!o->call_depth && o->verbosity >= v) || o->verbosity >= 5; |
9047ebbc MV |
148 | } |
149 | ||
c7d84924 | 150 | static void flush_output(struct merge_options *o) |
9047ebbc | 151 | { |
c7d84924 MV |
152 | if (o->obuf.len) { |
153 | fputs(o->obuf.buf, stdout); | |
154 | strbuf_reset(&o->obuf); | |
9047ebbc MV |
155 | } |
156 | } | |
157 | ||
28bea9e5 | 158 | __attribute__((format (printf, 3, 4))) |
8a2fce18 | 159 | static void output(struct merge_options *o, int v, const char *fmt, ...) |
9047ebbc | 160 | { |
9047ebbc MV |
161 | va_list ap; |
162 | ||
8a2fce18 | 163 | if (!show(o, v)) |
9047ebbc MV |
164 | return; |
165 | ||
c7d84924 MV |
166 | strbuf_grow(&o->obuf, o->call_depth * 2 + 2); |
167 | memset(o->obuf.buf + o->obuf.len, ' ', o->call_depth * 2); | |
168 | strbuf_setlen(&o->obuf, o->obuf.len + o->call_depth * 2); | |
9047ebbc MV |
169 | |
170 | va_start(ap, fmt); | |
ebeb6090 | 171 | strbuf_vaddf(&o->obuf, fmt, ap); |
9047ebbc MV |
172 | va_end(ap); |
173 | ||
c7d84924 | 174 | strbuf_add(&o->obuf, "\n", 1); |
8a2fce18 | 175 | if (!o->buffer_output) |
c7d84924 | 176 | flush_output(o); |
9047ebbc MV |
177 | } |
178 | ||
5033639c | 179 | static void output_commit_title(struct merge_options *o, struct commit *commit) |
9047ebbc MV |
180 | { |
181 | int i; | |
c7d84924 | 182 | flush_output(o); |
5033639c | 183 | for (i = o->call_depth; i--;) |
9047ebbc MV |
184 | fputs(" ", stdout); |
185 | if (commit->util) | |
ae8e4c9c | 186 | printf("virtual %s\n", merge_remote_util(commit)->name); |
9047ebbc MV |
187 | else { |
188 | printf("%s ", find_unique_abbrev(commit->object.sha1, DEFAULT_ABBREV)); | |
189 | if (parse_commit(commit) != 0) | |
190 | printf("(bad commit)\n"); | |
191 | else { | |
49b7120e CC |
192 | const char *title; |
193 | int len = find_commit_subject(commit->buffer, &title); | |
194 | if (len) | |
195 | printf("%.*s\n", len, title); | |
9047ebbc MV |
196 | } |
197 | } | |
198 | } | |
199 | ||
200 | static int add_cacheinfo(unsigned int mode, const unsigned char *sha1, | |
201 | const char *path, int stage, int refresh, int options) | |
202 | { | |
203 | struct cache_entry *ce; | |
204 | ce = make_cache_entry(mode, sha1 ? sha1 : null_sha1, path, stage, refresh); | |
205 | if (!ce) | |
206 | return error("addinfo_cache failed for path '%s'", path); | |
207 | return add_cache_entry(ce, options); | |
208 | } | |
209 | ||
9047ebbc MV |
210 | static void init_tree_desc_from_tree(struct tree_desc *desc, struct tree *tree) |
211 | { | |
212 | parse_tree(tree); | |
213 | init_tree_desc(desc, tree->buffer, tree->size); | |
214 | } | |
215 | ||
216 | static int git_merge_trees(int index_only, | |
217 | struct tree *common, | |
218 | struct tree *head, | |
219 | struct tree *merge) | |
220 | { | |
221 | int rc; | |
222 | struct tree_desc t[3]; | |
223 | struct unpack_trees_options opts; | |
224 | ||
225 | memset(&opts, 0, sizeof(opts)); | |
226 | if (index_only) | |
227 | opts.index_only = 1; | |
228 | else | |
229 | opts.update = 1; | |
230 | opts.merge = 1; | |
231 | opts.head_idx = 2; | |
232 | opts.fn = threeway_merge; | |
233 | opts.src_index = &the_index; | |
234 | opts.dst_index = &the_index; | |
e294030f | 235 | setup_unpack_trees_porcelain(&opts, "merge"); |
9047ebbc MV |
236 | |
237 | init_tree_desc_from_tree(t+0, common); | |
238 | init_tree_desc_from_tree(t+1, head); | |
239 | init_tree_desc_from_tree(t+2, merge); | |
240 | ||
241 | rc = unpack_trees(3, t, &opts); | |
242 | cache_tree_free(&active_cache_tree); | |
243 | return rc; | |
244 | } | |
245 | ||
8a2fce18 | 246 | struct tree *write_tree_from_memory(struct merge_options *o) |
9047ebbc MV |
247 | { |
248 | struct tree *result = NULL; | |
249 | ||
250 | if (unmerged_cache()) { | |
251 | int i; | |
19c6a4f8 | 252 | fprintf(stderr, "BUG: There are unmerged index entries:\n"); |
9047ebbc MV |
253 | for (i = 0; i < active_nr; i++) { |
254 | struct cache_entry *ce = active_cache[i]; | |
255 | if (ce_stage(ce)) | |
c43ba42e | 256 | fprintf(stderr, "BUG: %d %.*s\n", ce_stage(ce), |
19c6a4f8 | 257 | (int)ce_namelen(ce), ce->name); |
9047ebbc | 258 | } |
19c6a4f8 | 259 | die("Bug in merge-recursive.c"); |
9047ebbc MV |
260 | } |
261 | ||
262 | if (!active_cache_tree) | |
263 | active_cache_tree = cache_tree(); | |
264 | ||
265 | if (!cache_tree_fully_valid(active_cache_tree) && | |
266 | cache_tree_update(active_cache_tree, | |
e859c69b | 267 | active_cache, active_nr, 0) < 0) |
9047ebbc MV |
268 | die("error building trees"); |
269 | ||
270 | result = lookup_tree(active_cache_tree->sha1); | |
271 | ||
272 | return result; | |
273 | } | |
274 | ||
275 | static int save_files_dirs(const unsigned char *sha1, | |
276 | const char *base, int baselen, const char *path, | |
277 | unsigned int mode, int stage, void *context) | |
278 | { | |
279 | int len = strlen(path); | |
280 | char *newpath = xmalloc(baselen + len + 1); | |
696ee23c MV |
281 | struct merge_options *o = context; |
282 | ||
9047ebbc MV |
283 | memcpy(newpath, base, baselen); |
284 | memcpy(newpath + baselen, path, len); | |
285 | newpath[baselen + len] = '\0'; | |
286 | ||
287 | if (S_ISDIR(mode)) | |
78a395d3 | 288 | string_list_insert(&o->current_directory_set, newpath); |
9047ebbc | 289 | else |
78a395d3 | 290 | string_list_insert(&o->current_file_set, newpath); |
9047ebbc MV |
291 | free(newpath); |
292 | ||
d3bee161 | 293 | return (S_ISDIR(mode) ? READ_TREE_RECURSIVE : 0); |
9047ebbc MV |
294 | } |
295 | ||
696ee23c | 296 | static int get_files_dirs(struct merge_options *o, struct tree *tree) |
9047ebbc MV |
297 | { |
298 | int n; | |
f0096c06 NTND |
299 | struct pathspec match_all; |
300 | init_pathspec(&match_all, NULL); | |
301 | if (read_tree_recursive(tree, "", 0, 0, &match_all, save_files_dirs, o)) | |
9047ebbc | 302 | return 0; |
696ee23c | 303 | n = o->current_file_set.nr + o->current_directory_set.nr; |
9047ebbc MV |
304 | return n; |
305 | } | |
306 | ||
307 | /* | |
308 | * Returns an index_entry instance which doesn't have to correspond to | |
309 | * a real cache entry in Git's index. | |
310 | */ | |
311 | static struct stage_data *insert_stage_data(const char *path, | |
312 | struct tree *o, struct tree *a, struct tree *b, | |
313 | struct string_list *entries) | |
314 | { | |
315 | struct string_list_item *item; | |
316 | struct stage_data *e = xcalloc(1, sizeof(struct stage_data)); | |
317 | get_tree_entry(o->object.sha1, path, | |
318 | e->stages[1].sha, &e->stages[1].mode); | |
319 | get_tree_entry(a->object.sha1, path, | |
320 | e->stages[2].sha, &e->stages[2].mode); | |
321 | get_tree_entry(b->object.sha1, path, | |
322 | e->stages[3].sha, &e->stages[3].mode); | |
78a395d3 | 323 | item = string_list_insert(entries, path); |
9047ebbc MV |
324 | item->util = e; |
325 | return e; | |
326 | } | |
327 | ||
328 | /* | |
329 | * Create a dictionary mapping file names to stage_data objects. The | |
330 | * dictionary contains one entry for every path with a non-zero stage entry. | |
331 | */ | |
332 | static struct string_list *get_unmerged(void) | |
333 | { | |
334 | struct string_list *unmerged = xcalloc(1, sizeof(struct string_list)); | |
335 | int i; | |
336 | ||
337 | unmerged->strdup_strings = 1; | |
338 | ||
339 | for (i = 0; i < active_nr; i++) { | |
340 | struct string_list_item *item; | |
341 | struct stage_data *e; | |
342 | struct cache_entry *ce = active_cache[i]; | |
343 | if (!ce_stage(ce)) | |
344 | continue; | |
345 | ||
e8c8b713 | 346 | item = string_list_lookup(unmerged, ce->name); |
9047ebbc | 347 | if (!item) { |
78a395d3 | 348 | item = string_list_insert(unmerged, ce->name); |
9047ebbc MV |
349 | item->util = xcalloc(1, sizeof(struct stage_data)); |
350 | } | |
351 | e = item->util; | |
352 | e->stages[ce_stage(ce)].mode = ce->ce_mode; | |
353 | hashcpy(e->stages[ce_stage(ce)].sha, ce->sha1); | |
354 | } | |
355 | ||
356 | return unmerged; | |
357 | } | |
358 | ||
f0fd4d05 | 359 | static int string_list_df_name_compare(const void *a, const void *b) |
ef02b317 | 360 | { |
f0fd4d05 EN |
361 | const struct string_list_item *one = a; |
362 | const struct string_list_item *two = b; | |
363 | int onelen = strlen(one->string); | |
364 | int twolen = strlen(two->string); | |
365 | /* | |
366 | * Here we only care that entries for D/F conflicts are | |
367 | * adjacent, in particular with the file of the D/F conflict | |
368 | * appearing before files below the corresponding directory. | |
369 | * The order of the rest of the list is irrelevant for us. | |
ef02b317 | 370 | * |
f0fd4d05 EN |
371 | * To achieve this, we sort with df_name_compare and provide |
372 | * the mode S_IFDIR so that D/F conflicts will sort correctly. | |
373 | * We use the mode S_IFDIR for everything else for simplicity, | |
374 | * since in other cases any changes in their order due to | |
375 | * sorting cause no problems for us. | |
376 | */ | |
377 | int cmp = df_name_compare(one->string, onelen, S_IFDIR, | |
378 | two->string, twolen, S_IFDIR); | |
379 | /* | |
380 | * Now that 'foo' and 'foo/bar' compare equal, we have to make sure | |
381 | * that 'foo' comes before 'foo/bar'. | |
ef02b317 | 382 | */ |
f0fd4d05 EN |
383 | if (cmp) |
384 | return cmp; | |
385 | return onelen - twolen; | |
386 | } | |
387 | ||
70cc3d36 EN |
388 | static void record_df_conflict_files(struct merge_options *o, |
389 | struct string_list *entries) | |
ef02b317 | 390 | { |
70cc3d36 | 391 | /* If there is a D/F conflict and the file for such a conflict |
f7d650c0 | 392 | * currently exist in the working tree, we want to allow it to be |
edd2faf5 EN |
393 | * removed to make room for the corresponding directory if needed. |
394 | * The files underneath the directories of such D/F conflicts will | |
395 | * be processed before the corresponding file involved in the D/F | |
396 | * conflict. If the D/F directory ends up being removed by the | |
397 | * merge, then we won't have to touch the D/F file. If the D/F | |
398 | * directory needs to be written to the working copy, then the D/F | |
399 | * file will simply be removed (in make_room_for_path()) to make | |
400 | * room for the necessary paths. Note that if both the directory | |
401 | * and the file need to be present, then the D/F file will be | |
402 | * reinstated with a new unique name at the time it is processed. | |
ef02b317 | 403 | */ |
f701aae0 | 404 | struct string_list df_sorted_entries; |
ef02b317 | 405 | const char *last_file = NULL; |
c8516500 | 406 | int last_len = 0; |
ef02b317 EN |
407 | int i; |
408 | ||
0b30e812 EN |
409 | /* |
410 | * If we're merging merge-bases, we don't want to bother with | |
411 | * any working directory changes. | |
412 | */ | |
413 | if (o->call_depth) | |
414 | return; | |
415 | ||
f0fd4d05 | 416 | /* Ensure D/F conflicts are adjacent in the entries list. */ |
f701aae0 | 417 | memset(&df_sorted_entries, 0, sizeof(struct string_list)); |
ef02b317 | 418 | for (i = 0; i < entries->nr; i++) { |
f701aae0 EN |
419 | struct string_list_item *next = &entries->items[i]; |
420 | string_list_append(&df_sorted_entries, next->string)->util = | |
421 | next->util; | |
422 | } | |
423 | qsort(df_sorted_entries.items, entries->nr, sizeof(*entries->items), | |
f0fd4d05 EN |
424 | string_list_df_name_compare); |
425 | ||
70cc3d36 | 426 | string_list_clear(&o->df_conflict_file_set, 1); |
f701aae0 EN |
427 | for (i = 0; i < df_sorted_entries.nr; i++) { |
428 | const char *path = df_sorted_entries.items[i].string; | |
ef02b317 | 429 | int len = strlen(path); |
f701aae0 | 430 | struct stage_data *e = df_sorted_entries.items[i].util; |
ef02b317 EN |
431 | |
432 | /* | |
433 | * Check if last_file & path correspond to a D/F conflict; | |
434 | * i.e. whether path is last_file+'/'+<something>. | |
70cc3d36 EN |
435 | * If so, record that it's okay to remove last_file to make |
436 | * room for path and friends if needed. | |
ef02b317 EN |
437 | */ |
438 | if (last_file && | |
439 | len > last_len && | |
440 | memcmp(path, last_file, last_len) == 0 && | |
441 | path[last_len] == '/') { | |
70cc3d36 | 442 | string_list_insert(&o->df_conflict_file_set, last_file); |
ef02b317 EN |
443 | } |
444 | ||
445 | /* | |
446 | * Determine whether path could exist as a file in the | |
447 | * working directory as a possible D/F conflict. This | |
448 | * will only occur when it exists in stage 2 as a | |
449 | * file. | |
450 | */ | |
451 | if (S_ISREG(e->stages[2].mode) || S_ISLNK(e->stages[2].mode)) { | |
452 | last_file = path; | |
453 | last_len = len; | |
ef02b317 EN |
454 | } else { |
455 | last_file = NULL; | |
456 | } | |
457 | } | |
f701aae0 | 458 | string_list_clear(&df_sorted_entries, 0); |
ef02b317 EN |
459 | } |
460 | ||
9cba13ca | 461 | struct rename { |
9047ebbc MV |
462 | struct diff_filepair *pair; |
463 | struct stage_data *src_entry; | |
464 | struct stage_data *dst_entry; | |
465 | unsigned processed:1; | |
466 | }; | |
467 | ||
468 | /* | |
469 | * Get information of all renames which occurred between 'o_tree' and | |
470 | * 'tree'. We need the three trees in the merge ('o_tree', 'a_tree' and | |
471 | * 'b_tree') to be able to associate the correct cache entries with | |
472 | * the rename information. 'tree' is always equal to either a_tree or b_tree. | |
473 | */ | |
8a2fce18 MV |
474 | static struct string_list *get_renames(struct merge_options *o, |
475 | struct tree *tree, | |
476 | struct tree *o_tree, | |
477 | struct tree *a_tree, | |
478 | struct tree *b_tree, | |
479 | struct string_list *entries) | |
9047ebbc MV |
480 | { |
481 | int i; | |
482 | struct string_list *renames; | |
483 | struct diff_options opts; | |
484 | ||
485 | renames = xcalloc(1, sizeof(struct string_list)); | |
486 | diff_setup(&opts); | |
487 | DIFF_OPT_SET(&opts, RECURSIVE); | |
4f7cb99a | 488 | DIFF_OPT_CLR(&opts, RENAME_EMPTY); |
9047ebbc | 489 | opts.detect_rename = DIFF_DETECT_RENAME; |
8a2fce18 MV |
490 | opts.rename_limit = o->merge_rename_limit >= 0 ? o->merge_rename_limit : |
491 | o->diff_rename_limit >= 0 ? o->diff_rename_limit : | |
92c57e5c | 492 | 1000; |
10ae7526 | 493 | opts.rename_score = o->rename_score; |
99bfc669 | 494 | opts.show_rename_progress = o->show_rename_progress; |
9047ebbc MV |
495 | opts.output_format = DIFF_FORMAT_NO_OUTPUT; |
496 | if (diff_setup_done(&opts) < 0) | |
497 | die("diff setup failed"); | |
498 | diff_tree_sha1(o_tree->object.sha1, tree->object.sha1, "", &opts); | |
499 | diffcore_std(&opts); | |
bf0ab10f JK |
500 | if (opts.needed_rename_limit > o->needed_rename_limit) |
501 | o->needed_rename_limit = opts.needed_rename_limit; | |
9047ebbc MV |
502 | for (i = 0; i < diff_queued_diff.nr; ++i) { |
503 | struct string_list_item *item; | |
504 | struct rename *re; | |
505 | struct diff_filepair *pair = diff_queued_diff.queue[i]; | |
506 | if (pair->status != 'R') { | |
507 | diff_free_filepair(pair); | |
508 | continue; | |
509 | } | |
510 | re = xmalloc(sizeof(*re)); | |
511 | re->processed = 0; | |
512 | re->pair = pair; | |
e8c8b713 | 513 | item = string_list_lookup(entries, re->pair->one->path); |
9047ebbc MV |
514 | if (!item) |
515 | re->src_entry = insert_stage_data(re->pair->one->path, | |
516 | o_tree, a_tree, b_tree, entries); | |
517 | else | |
518 | re->src_entry = item->util; | |
519 | ||
e8c8b713 | 520 | item = string_list_lookup(entries, re->pair->two->path); |
9047ebbc MV |
521 | if (!item) |
522 | re->dst_entry = insert_stage_data(re->pair->two->path, | |
523 | o_tree, a_tree, b_tree, entries); | |
524 | else | |
525 | re->dst_entry = item->util; | |
78a395d3 | 526 | item = string_list_insert(renames, pair->one->path); |
9047ebbc MV |
527 | item->util = re; |
528 | } | |
529 | opts.output_format = DIFF_FORMAT_NO_OUTPUT; | |
530 | diff_queued_diff.nr = 0; | |
531 | diff_flush(&opts); | |
532 | return renames; | |
533 | } | |
534 | ||
650467cf EN |
535 | static int update_stages(const char *path, const struct diff_filespec *o, |
536 | const struct diff_filespec *a, | |
537 | const struct diff_filespec *b) | |
9047ebbc | 538 | { |
f53d3977 EN |
539 | |
540 | /* | |
541 | * NOTE: It is usually a bad idea to call update_stages on a path | |
542 | * before calling update_file on that same path, since it can | |
543 | * sometimes lead to spurious "refusing to lose untracked file..." | |
544 | * messages from update_file (via make_room_for path via | |
545 | * would_lose_untracked). Instead, reverse the order of the calls | |
546 | * (executing update_file first and then update_stages). | |
547 | */ | |
650467cf EN |
548 | int clear = 1; |
549 | int options = ADD_CACHE_OK_TO_ADD | ADD_CACHE_SKIP_DFCHECK; | |
9047ebbc MV |
550 | if (clear) |
551 | if (remove_file_from_cache(path)) | |
552 | return -1; | |
553 | if (o) | |
554 | if (add_cacheinfo(o->mode, o->sha1, path, 1, 0, options)) | |
555 | return -1; | |
556 | if (a) | |
557 | if (add_cacheinfo(a->mode, a->sha1, path, 2, 0, options)) | |
558 | return -1; | |
559 | if (b) | |
560 | if (add_cacheinfo(b->mode, b->sha1, path, 3, 0, options)) | |
561 | return -1; | |
562 | return 0; | |
563 | } | |
564 | ||
b8ddf164 EN |
565 | static void update_entry(struct stage_data *entry, |
566 | struct diff_filespec *o, | |
567 | struct diff_filespec *a, | |
568 | struct diff_filespec *b) | |
2ff739f9 | 569 | { |
2ff739f9 EN |
570 | entry->processed = 0; |
571 | entry->stages[1].mode = o->mode; | |
572 | entry->stages[2].mode = a->mode; | |
573 | entry->stages[3].mode = b->mode; | |
574 | hashcpy(entry->stages[1].sha, o->sha1); | |
575 | hashcpy(entry->stages[2].sha, a->sha1); | |
576 | hashcpy(entry->stages[3].sha, b->sha1); | |
2ff739f9 EN |
577 | } |
578 | ||
b7fa51da MV |
579 | static int remove_file(struct merge_options *o, int clean, |
580 | const char *path, int no_wd) | |
9047ebbc | 581 | { |
b7fa51da MV |
582 | int update_cache = o->call_depth || clean; |
583 | int update_working_directory = !o->call_depth && !no_wd; | |
9047ebbc MV |
584 | |
585 | if (update_cache) { | |
586 | if (remove_file_from_cache(path)) | |
587 | return -1; | |
588 | } | |
589 | if (update_working_directory) { | |
25755e84 | 590 | if (remove_path(path)) |
9047ebbc | 591 | return -1; |
9047ebbc MV |
592 | } |
593 | return 0; | |
594 | } | |
595 | ||
696ee23c | 596 | static char *unique_path(struct merge_options *o, const char *path, const char *branch) |
9047ebbc MV |
597 | { |
598 | char *newpath = xmalloc(strlen(path) + 1 + strlen(branch) + 8 + 1); | |
599 | int suffix = 0; | |
600 | struct stat st; | |
601 | char *p = newpath + strlen(path); | |
602 | strcpy(newpath, path); | |
603 | *(p++) = '~'; | |
604 | strcpy(p, branch); | |
605 | for (; *p; ++p) | |
606 | if ('/' == *p) | |
607 | *p = '_'; | |
696ee23c MV |
608 | while (string_list_has_string(&o->current_file_set, newpath) || |
609 | string_list_has_string(&o->current_directory_set, newpath) || | |
9047ebbc MV |
610 | lstat(newpath, &st) == 0) |
611 | sprintf(p, "_%d", suffix++); | |
612 | ||
78a395d3 | 613 | string_list_insert(&o->current_file_set, newpath); |
9047ebbc MV |
614 | return newpath; |
615 | } | |
616 | ||
617 | static void flush_buffer(int fd, const char *buf, unsigned long size) | |
618 | { | |
619 | while (size > 0) { | |
620 | long ret = write_in_full(fd, buf, size); | |
621 | if (ret < 0) { | |
622 | /* Ignore epipe */ | |
623 | if (errno == EPIPE) | |
624 | break; | |
d824cbba | 625 | die_errno("merge-recursive"); |
9047ebbc MV |
626 | } else if (!ret) { |
627 | die("merge-recursive: disk full?"); | |
628 | } | |
629 | size -= ret; | |
630 | buf += ret; | |
631 | } | |
632 | } | |
633 | ||
f2507b4e EN |
634 | static int dir_in_way(const char *path, int check_working_copy) |
635 | { | |
636 | int pos, pathlen = strlen(path); | |
637 | char *dirpath = xmalloc(pathlen + 2); | |
638 | struct stat st; | |
639 | ||
640 | strcpy(dirpath, path); | |
641 | dirpath[pathlen] = '/'; | |
642 | dirpath[pathlen+1] = '\0'; | |
643 | ||
644 | pos = cache_name_pos(dirpath, pathlen+1); | |
645 | ||
646 | if (pos < 0) | |
647 | pos = -1 - pos; | |
648 | if (pos < active_nr && | |
649 | !strncmp(dirpath, active_cache[pos]->name, pathlen+1)) { | |
650 | free(dirpath); | |
651 | return 1; | |
652 | } | |
653 | ||
654 | free(dirpath); | |
655 | return check_working_copy && !lstat(path, &st) && S_ISDIR(st.st_mode); | |
656 | } | |
657 | ||
aacb82de | 658 | static int was_tracked(const char *path) |
60c91181 JH |
659 | { |
660 | int pos = cache_name_pos(path, strlen(path)); | |
661 | ||
662 | if (pos < 0) | |
663 | pos = -1 - pos; | |
664 | while (pos < active_nr && | |
665 | !strcmp(path, active_cache[pos]->name)) { | |
666 | /* | |
667 | * If stage #0, it is definitely tracked. | |
668 | * If it has stage #2 then it was tracked | |
669 | * before this merge started. All other | |
670 | * cases the path was not tracked. | |
671 | */ | |
672 | switch (ce_stage(active_cache[pos])) { | |
673 | case 0: | |
674 | case 2: | |
aacb82de | 675 | return 1; |
60c91181 JH |
676 | } |
677 | pos++; | |
678 | } | |
aacb82de | 679 | return 0; |
60c91181 JH |
680 | } |
681 | ||
aacb82de | 682 | static int would_lose_untracked(const char *path) |
9047ebbc | 683 | { |
aacb82de | 684 | return !was_tracked(path) && file_exists(path); |
60c91181 JH |
685 | } |
686 | ||
ed0148a5 | 687 | static int make_room_for_path(struct merge_options *o, const char *path) |
9047ebbc | 688 | { |
ed0148a5 | 689 | int status, i; |
9047ebbc MV |
690 | const char *msg = "failed to create path '%s'%s"; |
691 | ||
ed0148a5 EN |
692 | /* Unlink any D/F conflict files that are in the way */ |
693 | for (i = 0; i < o->df_conflict_file_set.nr; i++) { | |
694 | const char *df_path = o->df_conflict_file_set.items[i].string; | |
695 | size_t pathlen = strlen(path); | |
696 | size_t df_pathlen = strlen(df_path); | |
697 | if (df_pathlen < pathlen && | |
698 | path[df_pathlen] == '/' && | |
699 | strncmp(path, df_path, df_pathlen) == 0) { | |
700 | output(o, 3, | |
701 | "Removing %s to make room for subdirectory\n", | |
702 | df_path); | |
703 | unlink(df_path); | |
704 | unsorted_string_list_delete_item(&o->df_conflict_file_set, | |
705 | i, 0); | |
706 | break; | |
707 | } | |
708 | } | |
709 | ||
710 | /* Make sure leading directories are created */ | |
9047ebbc MV |
711 | status = safe_create_leading_directories_const(path); |
712 | if (status) { | |
713 | if (status == -3) { | |
714 | /* something else exists */ | |
715 | error(msg, path, ": perhaps a D/F conflict?"); | |
716 | return -1; | |
717 | } | |
718 | die(msg, path, ""); | |
719 | } | |
720 | ||
60c91181 JH |
721 | /* |
722 | * Do not unlink a file in the work tree if we are not | |
723 | * tracking it. | |
724 | */ | |
725 | if (would_lose_untracked(path)) | |
726 | return error("refusing to lose untracked file at '%s'", | |
727 | path); | |
728 | ||
9047ebbc MV |
729 | /* Successful unlink is good.. */ |
730 | if (!unlink(path)) | |
731 | return 0; | |
732 | /* .. and so is no existing file */ | |
733 | if (errno == ENOENT) | |
734 | return 0; | |
735 | /* .. but not some other error (who really cares what?) */ | |
736 | return error(msg, path, ": perhaps a D/F conflict?"); | |
737 | } | |
738 | ||
b7fa51da MV |
739 | static void update_file_flags(struct merge_options *o, |
740 | const unsigned char *sha, | |
9047ebbc MV |
741 | unsigned mode, |
742 | const char *path, | |
743 | int update_cache, | |
744 | int update_wd) | |
745 | { | |
b7fa51da | 746 | if (o->call_depth) |
9047ebbc MV |
747 | update_wd = 0; |
748 | ||
749 | if (update_wd) { | |
750 | enum object_type type; | |
751 | void *buf; | |
752 | unsigned long size; | |
753 | ||
68d03e4a | 754 | if (S_ISGITLINK(mode)) { |
0c44c943 JH |
755 | /* |
756 | * We may later decide to recursively descend into | |
757 | * the submodule directory and update its index | |
758 | * and/or work tree, but we do not do that now. | |
759 | */ | |
68d03e4a | 760 | update_wd = 0; |
0c44c943 | 761 | goto update_index; |
68d03e4a | 762 | } |
9047ebbc MV |
763 | |
764 | buf = read_sha1_file(sha, &type, &size); | |
765 | if (!buf) | |
766 | die("cannot read object %s '%s'", sha1_to_hex(sha), path); | |
767 | if (type != OBJ_BLOB) | |
768 | die("blob expected for %s '%s'", sha1_to_hex(sha), path); | |
769 | if (S_ISREG(mode)) { | |
f285a2d7 | 770 | struct strbuf strbuf = STRBUF_INIT; |
9047ebbc MV |
771 | if (convert_to_working_tree(path, buf, size, &strbuf)) { |
772 | free(buf); | |
773 | size = strbuf.len; | |
774 | buf = strbuf_detach(&strbuf, NULL); | |
775 | } | |
776 | } | |
777 | ||
ed0148a5 | 778 | if (make_room_for_path(o, path) < 0) { |
9047ebbc MV |
779 | update_wd = 0; |
780 | free(buf); | |
781 | goto update_index; | |
782 | } | |
783 | if (S_ISREG(mode) || (!has_symlinks && S_ISLNK(mode))) { | |
784 | int fd; | |
785 | if (mode & 0100) | |
786 | mode = 0777; | |
787 | else | |
788 | mode = 0666; | |
789 | fd = open(path, O_WRONLY | O_TRUNC | O_CREAT, mode); | |
790 | if (fd < 0) | |
d824cbba | 791 | die_errno("failed to open '%s'", path); |
9047ebbc MV |
792 | flush_buffer(fd, buf, size); |
793 | close(fd); | |
794 | } else if (S_ISLNK(mode)) { | |
795 | char *lnk = xmemdupz(buf, size); | |
796 | safe_create_leading_directories_const(path); | |
797 | unlink(path); | |
304dcf26 | 798 | if (symlink(lnk, path)) |
d824cbba | 799 | die_errno("failed to symlink '%s'", path); |
9047ebbc MV |
800 | free(lnk); |
801 | } else | |
802 | die("do not know what to do with %06o %s '%s'", | |
803 | mode, sha1_to_hex(sha), path); | |
804 | free(buf); | |
805 | } | |
806 | update_index: | |
807 | if (update_cache) | |
808 | add_cacheinfo(mode, sha, path, 0, update_wd, ADD_CACHE_OK_TO_ADD); | |
809 | } | |
810 | ||
b7fa51da MV |
811 | static void update_file(struct merge_options *o, |
812 | int clean, | |
9047ebbc MV |
813 | const unsigned char *sha, |
814 | unsigned mode, | |
815 | const char *path) | |
816 | { | |
b7fa51da | 817 | update_file_flags(o, sha, mode, path, o->call_depth || clean, !o->call_depth); |
9047ebbc MV |
818 | } |
819 | ||
820 | /* Low level file merging, update and removal */ | |
821 | ||
9cba13ca | 822 | struct merge_file_info { |
9047ebbc MV |
823 | unsigned char sha[20]; |
824 | unsigned mode; | |
825 | unsigned clean:1, | |
826 | merge:1; | |
827 | }; | |
828 | ||
b7fa51da MV |
829 | static int merge_3way(struct merge_options *o, |
830 | mmbuffer_t *result_buf, | |
0c059420 EN |
831 | const struct diff_filespec *one, |
832 | const struct diff_filespec *a, | |
833 | const struct diff_filespec *b, | |
9047ebbc MV |
834 | const char *branch1, |
835 | const char *branch2) | |
836 | { | |
837 | mmfile_t orig, src1, src2; | |
712516bc | 838 | struct ll_merge_options ll_opts = {0}; |
4c5868f4 | 839 | char *base_name, *name1, *name2; |
9047ebbc | 840 | int merge_status; |
8cc5b290 | 841 | |
712516bc | 842 | ll_opts.renormalize = o->renormalize; |
58a1ece4 | 843 | ll_opts.xdl_opts = o->xdl_opts; |
712516bc JN |
844 | |
845 | if (o->call_depth) { | |
846 | ll_opts.virtual_ancestor = 1; | |
847 | ll_opts.variant = 0; | |
848 | } else { | |
8cc5b290 AP |
849 | switch (o->recursive_variant) { |
850 | case MERGE_RECURSIVE_OURS: | |
712516bc | 851 | ll_opts.variant = XDL_MERGE_FAVOR_OURS; |
8cc5b290 AP |
852 | break; |
853 | case MERGE_RECURSIVE_THEIRS: | |
712516bc | 854 | ll_opts.variant = XDL_MERGE_FAVOR_THEIRS; |
8cc5b290 AP |
855 | break; |
856 | default: | |
712516bc | 857 | ll_opts.variant = 0; |
8cc5b290 AP |
858 | break; |
859 | } | |
860 | } | |
9047ebbc | 861 | |
4c5868f4 JN |
862 | if (strcmp(a->path, b->path) || |
863 | (o->ancestor != NULL && strcmp(a->path, one->path) != 0)) { | |
864 | base_name = o->ancestor == NULL ? NULL : | |
865 | xstrdup(mkpath("%s:%s", o->ancestor, one->path)); | |
606475f3 MR |
866 | name1 = xstrdup(mkpath("%s:%s", branch1, a->path)); |
867 | name2 = xstrdup(mkpath("%s:%s", branch2, b->path)); | |
868 | } else { | |
4c5868f4 JN |
869 | base_name = o->ancestor == NULL ? NULL : |
870 | xstrdup(mkpath("%s", o->ancestor)); | |
606475f3 MR |
871 | name1 = xstrdup(mkpath("%s", branch1)); |
872 | name2 = xstrdup(mkpath("%s", branch2)); | |
873 | } | |
9047ebbc | 874 | |
06b65939 ML |
875 | read_mmblob(&orig, one->sha1); |
876 | read_mmblob(&src1, a->sha1); | |
877 | read_mmblob(&src2, b->sha1); | |
9047ebbc | 878 | |
4c5868f4 | 879 | merge_status = ll_merge(result_buf, a->path, &orig, base_name, |
712516bc | 880 | &src1, name1, &src2, name2, &ll_opts); |
9047ebbc MV |
881 | |
882 | free(name1); | |
883 | free(name2); | |
884 | free(orig.ptr); | |
885 | free(src1.ptr); | |
886 | free(src2.ptr); | |
887 | return merge_status; | |
888 | } | |
889 | ||
6bdaead1 EN |
890 | static struct merge_file_info merge_file_1(struct merge_options *o, |
891 | const struct diff_filespec *one, | |
892 | const struct diff_filespec *a, | |
893 | const struct diff_filespec *b, | |
894 | const char *branch1, | |
895 | const char *branch2) | |
9047ebbc MV |
896 | { |
897 | struct merge_file_info result; | |
898 | result.merge = 0; | |
899 | result.clean = 1; | |
900 | ||
901 | if ((S_IFMT & a->mode) != (S_IFMT & b->mode)) { | |
902 | result.clean = 0; | |
903 | if (S_ISREG(a->mode)) { | |
904 | result.mode = a->mode; | |
905 | hashcpy(result.sha, a->sha1); | |
906 | } else { | |
907 | result.mode = b->mode; | |
908 | hashcpy(result.sha, b->sha1); | |
909 | } | |
910 | } else { | |
b7fa51da | 911 | if (!sha_eq(a->sha1, one->sha1) && !sha_eq(b->sha1, one->sha1)) |
9047ebbc MV |
912 | result.merge = 1; |
913 | ||
914 | /* | |
915 | * Merge modes | |
916 | */ | |
b7fa51da | 917 | if (a->mode == b->mode || a->mode == one->mode) |
9047ebbc MV |
918 | result.mode = b->mode; |
919 | else { | |
920 | result.mode = a->mode; | |
b7fa51da | 921 | if (b->mode != one->mode) { |
9047ebbc MV |
922 | result.clean = 0; |
923 | result.merge = 1; | |
924 | } | |
925 | } | |
926 | ||
b7fa51da | 927 | if (sha_eq(a->sha1, b->sha1) || sha_eq(a->sha1, one->sha1)) |
9047ebbc | 928 | hashcpy(result.sha, b->sha1); |
b7fa51da | 929 | else if (sha_eq(b->sha1, one->sha1)) |
9047ebbc MV |
930 | hashcpy(result.sha, a->sha1); |
931 | else if (S_ISREG(a->mode)) { | |
932 | mmbuffer_t result_buf; | |
933 | int merge_status; | |
934 | ||
b7fa51da | 935 | merge_status = merge_3way(o, &result_buf, one, a, b, |
9047ebbc MV |
936 | branch1, branch2); |
937 | ||
938 | if ((merge_status < 0) || !result_buf.ptr) | |
939 | die("Failed to execute internal merge"); | |
940 | ||
941 | if (write_sha1_file(result_buf.ptr, result_buf.size, | |
942 | blob_type, result.sha)) | |
943 | die("Unable to add %s to database", | |
944 | a->path); | |
945 | ||
946 | free(result_buf.ptr); | |
947 | result.clean = (merge_status == 0); | |
948 | } else if (S_ISGITLINK(a->mode)) { | |
80988783 BK |
949 | result.clean = merge_submodule(result.sha, |
950 | one->path, one->sha1, | |
951 | a->sha1, b->sha1, | |
952 | !o->call_depth); | |
9047ebbc MV |
953 | } else if (S_ISLNK(a->mode)) { |
954 | hashcpy(result.sha, a->sha1); | |
955 | ||
956 | if (!sha_eq(a->sha1, b->sha1)) | |
957 | result.clean = 0; | |
958 | } else { | |
959 | die("unsupported object type in the tree"); | |
960 | } | |
961 | } | |
962 | ||
963 | return result; | |
964 | } | |
965 | ||
dac47415 EN |
966 | static struct merge_file_info |
967 | merge_file_special_markers(struct merge_options *o, | |
968 | const struct diff_filespec *one, | |
969 | const struct diff_filespec *a, | |
970 | const struct diff_filespec *b, | |
971 | const char *branch1, | |
972 | const char *filename1, | |
973 | const char *branch2, | |
974 | const char *filename2) | |
975 | { | |
976 | char *side1 = NULL; | |
977 | char *side2 = NULL; | |
978 | struct merge_file_info mfi; | |
979 | ||
980 | if (filename1) { | |
981 | side1 = xmalloc(strlen(branch1) + strlen(filename1) + 2); | |
982 | sprintf(side1, "%s:%s", branch1, filename1); | |
983 | } | |
984 | if (filename2) { | |
985 | side2 = xmalloc(strlen(branch2) + strlen(filename2) + 2); | |
986 | sprintf(side2, "%s:%s", branch2, filename2); | |
987 | } | |
988 | ||
989 | mfi = merge_file_1(o, one, a, b, | |
990 | side1 ? side1 : branch1, side2 ? side2 : branch2); | |
991 | free(side1); | |
992 | free(side2); | |
993 | return mfi; | |
994 | } | |
995 | ||
6bdaead1 EN |
996 | static struct merge_file_info merge_file(struct merge_options *o, |
997 | const char *path, | |
998 | const unsigned char *o_sha, int o_mode, | |
999 | const unsigned char *a_sha, int a_mode, | |
1000 | const unsigned char *b_sha, int b_mode, | |
1001 | const char *branch1, | |
1002 | const char *branch2) | |
1003 | { | |
1004 | struct diff_filespec one, a, b; | |
1005 | ||
1006 | one.path = a.path = b.path = (char *)path; | |
1007 | hashcpy(one.sha1, o_sha); | |
1008 | one.mode = o_mode; | |
1009 | hashcpy(a.sha1, a_sha); | |
1010 | a.mode = a_mode; | |
1011 | hashcpy(b.sha1, b_sha); | |
1012 | b.mode = b_mode; | |
1013 | return merge_file_1(o, &one, &a, &b, branch1, branch2); | |
1014 | } | |
1015 | ||
b7033252 EN |
1016 | static void handle_change_delete(struct merge_options *o, |
1017 | const char *path, | |
1018 | const unsigned char *o_sha, int o_mode, | |
1019 | const unsigned char *a_sha, int a_mode, | |
1020 | const unsigned char *b_sha, int b_mode, | |
1021 | const char *change, const char *change_past) | |
1022 | { | |
1023 | char *renamed = NULL; | |
1024 | if (dir_in_way(path, !o->call_depth)) { | |
1025 | renamed = unique_path(o, path, a_sha ? o->branch1 : o->branch2); | |
1026 | } | |
1027 | ||
1028 | if (o->call_depth) { | |
1029 | /* | |
1030 | * We cannot arbitrarily accept either a_sha or b_sha as | |
1031 | * correct; since there is no true "middle point" between | |
1032 | * them, simply reuse the base version for virtual merge base. | |
1033 | */ | |
1034 | remove_file_from_cache(path); | |
1035 | update_file(o, 0, o_sha, o_mode, renamed ? renamed : path); | |
1036 | } else if (!a_sha) { | |
1037 | output(o, 1, "CONFLICT (%s/delete): %s deleted in %s " | |
1038 | "and %s in %s. Version %s of %s left in tree%s%s.", | |
1039 | change, path, o->branch1, | |
1040 | change_past, o->branch2, o->branch2, path, | |
1041 | NULL == renamed ? "" : " at ", | |
1042 | NULL == renamed ? "" : renamed); | |
1043 | update_file(o, 0, b_sha, b_mode, renamed ? renamed : path); | |
1044 | } else { | |
1045 | output(o, 1, "CONFLICT (%s/delete): %s deleted in %s " | |
1046 | "and %s in %s. Version %s of %s left in tree%s%s.", | |
1047 | change, path, o->branch2, | |
1048 | change_past, o->branch1, o->branch1, path, | |
1049 | NULL == renamed ? "" : " at ", | |
1050 | NULL == renamed ? "" : renamed); | |
35a74abf EN |
1051 | if (renamed) |
1052 | update_file(o, 0, a_sha, a_mode, renamed); | |
1053 | /* | |
1054 | * No need to call update_file() on path when !renamed, since | |
1055 | * that would needlessly touch path. We could call | |
1056 | * update_file_flags() with update_cache=0 and update_wd=0, | |
1057 | * but that's a no-op. | |
1058 | */ | |
b7033252 EN |
1059 | } |
1060 | free(renamed); | |
1061 | } | |
1062 | ||
6ef2cb00 EN |
1063 | static void conflict_rename_delete(struct merge_options *o, |
1064 | struct diff_filepair *pair, | |
1065 | const char *rename_branch, | |
1066 | const char *other_branch) | |
9047ebbc | 1067 | { |
e03acb8b EN |
1068 | const struct diff_filespec *orig = pair->one; |
1069 | const struct diff_filespec *dest = pair->two; | |
e03acb8b EN |
1070 | const unsigned char *a_sha = NULL; |
1071 | const unsigned char *b_sha = NULL; | |
1072 | int a_mode = 0; | |
1073 | int b_mode = 0; | |
1074 | ||
1075 | if (rename_branch == o->branch1) { | |
1076 | a_sha = dest->sha1; | |
1077 | a_mode = dest->mode; | |
1078 | } else { | |
1079 | b_sha = dest->sha1; | |
1080 | b_mode = dest->mode; | |
1081 | } | |
6ef2cb00 | 1082 | |
f53d3977 EN |
1083 | handle_change_delete(o, |
1084 | o->call_depth ? orig->path : dest->path, | |
1085 | orig->sha1, orig->mode, | |
1086 | a_sha, a_mode, | |
1087 | b_sha, b_mode, | |
1088 | "rename", "renamed"); | |
1089 | ||
e03acb8b EN |
1090 | if (o->call_depth) { |
1091 | remove_file_from_cache(dest->path); | |
e03acb8b | 1092 | } else { |
e03acb8b EN |
1093 | update_stages(dest->path, NULL, |
1094 | rename_branch == o->branch1 ? dest : NULL, | |
1095 | rename_branch == o->branch1 ? NULL : dest); | |
a0de2f6b | 1096 | } |
e03acb8b | 1097 | |
6ef2cb00 EN |
1098 | } |
1099 | ||
1ac91b32 EN |
1100 | static struct diff_filespec *filespec_from_entry(struct diff_filespec *target, |
1101 | struct stage_data *entry, | |
1102 | int stage) | |
9047ebbc | 1103 | { |
1ac91b32 EN |
1104 | unsigned char *sha = entry->stages[stage].sha; |
1105 | unsigned mode = entry->stages[stage].mode; | |
1106 | if (mode == 0 || is_null_sha1(sha)) | |
1107 | return NULL; | |
1108 | hashcpy(target->sha1, sha); | |
1109 | target->mode = mode; | |
1110 | return target; | |
1111 | } | |
1112 | ||
3672c971 EN |
1113 | static void handle_file(struct merge_options *o, |
1114 | struct diff_filespec *rename, | |
1115 | int stage, | |
1116 | struct rename_conflict_info *ci) | |
1117 | { | |
1118 | char *dst_name = rename->path; | |
1119 | struct stage_data *dst_entry; | |
1120 | const char *cur_branch, *other_branch; | |
1121 | struct diff_filespec other; | |
1122 | struct diff_filespec *add; | |
1123 | ||
1124 | if (stage == 2) { | |
1125 | dst_entry = ci->dst_entry1; | |
1126 | cur_branch = ci->branch1; | |
1127 | other_branch = ci->branch2; | |
1128 | } else { | |
1129 | dst_entry = ci->dst_entry2; | |
1130 | cur_branch = ci->branch2; | |
1131 | other_branch = ci->branch1; | |
9047ebbc | 1132 | } |
3672c971 EN |
1133 | |
1134 | add = filespec_from_entry(&other, dst_entry, stage ^ 1); | |
3672c971 EN |
1135 | if (add) { |
1136 | char *add_name = unique_path(o, rename->path, other_branch); | |
1137 | update_file(o, 0, add->sha1, add->mode, add_name); | |
1138 | ||
1139 | remove_file(o, 0, rename->path, 0); | |
1140 | dst_name = unique_path(o, rename->path, cur_branch); | |
1141 | } else { | |
1142 | if (dir_in_way(rename->path, !o->call_depth)) { | |
1143 | dst_name = unique_path(o, rename->path, cur_branch); | |
1144 | output(o, 1, "%s is a directory in %s adding as %s instead", | |
1145 | rename->path, other_branch, dst_name); | |
1146 | } | |
9047ebbc | 1147 | } |
3672c971 | 1148 | update_file(o, 0, rename->sha1, rename->mode, dst_name); |
f53d3977 EN |
1149 | if (stage == 2) |
1150 | update_stages(rename->path, NULL, rename, add); | |
1151 | else | |
1152 | update_stages(rename->path, NULL, add, rename); | |
3672c971 EN |
1153 | |
1154 | if (dst_name != rename->path) | |
1155 | free(dst_name); | |
1156 | } | |
1157 | ||
09c01f85 | 1158 | static void conflict_rename_rename_1to2(struct merge_options *o, |
a99b7f22 | 1159 | struct rename_conflict_info *ci) |
9047ebbc | 1160 | { |
09c01f85 | 1161 | /* One file was renamed in both branches, but to different names. */ |
a99b7f22 EN |
1162 | struct diff_filespec *one = ci->pair1->one; |
1163 | struct diff_filespec *a = ci->pair1->two; | |
1164 | struct diff_filespec *b = ci->pair2->two; | |
4f66dade EN |
1165 | |
1166 | output(o, 1, "CONFLICT (rename/rename): " | |
1167 | "Rename \"%s\"->\"%s\" in branch \"%s\" " | |
1168 | "rename \"%s\"->\"%s\" in \"%s\"%s", | |
a99b7f22 EN |
1169 | one->path, a->path, ci->branch1, |
1170 | one->path, b->path, ci->branch2, | |
4f66dade | 1171 | o->call_depth ? " (left unresolved)" : ""); |
b7fa51da | 1172 | if (o->call_depth) { |
c52ff85d | 1173 | struct merge_file_info mfi; |
6d63070c EN |
1174 | struct diff_filespec other; |
1175 | struct diff_filespec *add; | |
a99b7f22 EN |
1176 | mfi = merge_file(o, one->path, |
1177 | one->sha1, one->mode, | |
1178 | a->sha1, a->mode, | |
1179 | b->sha1, b->mode, | |
1180 | ci->branch1, ci->branch2); | |
9047ebbc | 1181 | /* |
c52ff85d EN |
1182 | * FIXME: For rename/add-source conflicts (if we could detect |
1183 | * such), this is wrong. We should instead find a unique | |
1184 | * pathname and then either rename the add-source file to that | |
1185 | * unique path, or use that unique path instead of src here. | |
9047ebbc | 1186 | */ |
a99b7f22 | 1187 | update_file(o, 0, mfi.sha, mfi.mode, one->path); |
07413c5a | 1188 | |
6d63070c EN |
1189 | /* |
1190 | * Above, we put the merged content at the merge-base's | |
1191 | * path. Now we usually need to delete both a->path and | |
1192 | * b->path. However, the rename on each side of the merge | |
1193 | * could also be involved in a rename/add conflict. In | |
1194 | * such cases, we should keep the added file around, | |
1195 | * resolving the conflict at that path in its favor. | |
1196 | */ | |
1197 | add = filespec_from_entry(&other, ci->dst_entry1, 2 ^ 1); | |
1198 | if (add) | |
1199 | update_file(o, 0, add->sha1, add->mode, a->path); | |
1200 | else | |
1201 | remove_file_from_cache(a->path); | |
1202 | add = filespec_from_entry(&other, ci->dst_entry2, 3 ^ 1); | |
1203 | if (add) | |
1204 | update_file(o, 0, add->sha1, add->mode, b->path); | |
1205 | else | |
1206 | remove_file_from_cache(b->path); | |
9047ebbc | 1207 | } else { |
3672c971 EN |
1208 | handle_file(o, a, 2, ci); |
1209 | handle_file(o, b, 3, ci); | |
9047ebbc | 1210 | } |
9047ebbc MV |
1211 | } |
1212 | ||
09c01f85 | 1213 | static void conflict_rename_rename_2to1(struct merge_options *o, |
461f5041 | 1214 | struct rename_conflict_info *ci) |
9047ebbc | 1215 | { |
461f5041 EN |
1216 | /* Two files, a & b, were renamed to the same thing, c. */ |
1217 | struct diff_filespec *a = ci->pair1->one; | |
1218 | struct diff_filespec *b = ci->pair2->one; | |
1219 | struct diff_filespec *c1 = ci->pair1->two; | |
1220 | struct diff_filespec *c2 = ci->pair2->two; | |
1221 | char *path = c1->path; /* == c2->path */ | |
434b8525 EN |
1222 | struct merge_file_info mfi_c1; |
1223 | struct merge_file_info mfi_c2; | |
461f5041 EN |
1224 | |
1225 | output(o, 1, "CONFLICT (rename/rename): " | |
1226 | "Rename %s->%s in %s. " | |
1227 | "Rename %s->%s in %s", | |
1228 | a->path, c1->path, ci->branch1, | |
1229 | b->path, c2->path, ci->branch2); | |
1230 | ||
1231 | remove_file(o, 1, a->path, would_lose_untracked(a->path)); | |
1232 | remove_file(o, 1, b->path, would_lose_untracked(b->path)); | |
1233 | ||
434b8525 EN |
1234 | mfi_c1 = merge_file_special_markers(o, a, c1, &ci->ren1_other, |
1235 | o->branch1, c1->path, | |
1236 | o->branch2, ci->ren1_other.path); | |
1237 | mfi_c2 = merge_file_special_markers(o, b, &ci->ren2_other, c2, | |
1238 | o->branch1, ci->ren2_other.path, | |
1239 | o->branch2, c2->path); | |
1240 | ||
0a6b8712 | 1241 | if (o->call_depth) { |
434b8525 EN |
1242 | /* |
1243 | * If mfi_c1.clean && mfi_c2.clean, then it might make | |
1244 | * sense to do a two-way merge of those results. But, I | |
1245 | * think in all cases, it makes sense to have the virtual | |
1246 | * merge base just undo the renames; they can be detected | |
1247 | * again later for the non-recursive merge. | |
1248 | */ | |
1249 | remove_file(o, 0, path, 0); | |
1250 | update_file(o, 0, mfi_c1.sha, mfi_c1.mode, a->path); | |
1251 | update_file(o, 0, mfi_c2.sha, mfi_c2.mode, b->path); | |
0a6b8712 | 1252 | } else { |
461f5041 EN |
1253 | char *new_path1 = unique_path(o, path, ci->branch1); |
1254 | char *new_path2 = unique_path(o, path, ci->branch2); | |
0a6b8712 | 1255 | output(o, 1, "Renaming %s to %s and %s to %s instead", |
461f5041 | 1256 | a->path, new_path1, b->path, new_path2); |
0a6b8712 | 1257 | remove_file(o, 0, path, 0); |
434b8525 EN |
1258 | update_file(o, 0, mfi_c1.sha, mfi_c1.mode, new_path1); |
1259 | update_file(o, 0, mfi_c2.sha, mfi_c2.mode, new_path2); | |
0a6b8712 EN |
1260 | free(new_path2); |
1261 | free(new_path1); | |
1262 | } | |
9047ebbc MV |
1263 | } |
1264 | ||
8a2fce18 MV |
1265 | static int process_renames(struct merge_options *o, |
1266 | struct string_list *a_renames, | |
1267 | struct string_list *b_renames) | |
9047ebbc MV |
1268 | { |
1269 | int clean_merge = 1, i, j; | |
183113a5 TF |
1270 | struct string_list a_by_dst = STRING_LIST_INIT_NODUP; |
1271 | struct string_list b_by_dst = STRING_LIST_INIT_NODUP; | |
9047ebbc MV |
1272 | const struct rename *sre; |
1273 | ||
1274 | for (i = 0; i < a_renames->nr; i++) { | |
1275 | sre = a_renames->items[i].util; | |
78a395d3 | 1276 | string_list_insert(&a_by_dst, sre->pair->two->path)->util |
0a6b8712 | 1277 | = (void *)sre; |
9047ebbc MV |
1278 | } |
1279 | for (i = 0; i < b_renames->nr; i++) { | |
1280 | sre = b_renames->items[i].util; | |
78a395d3 | 1281 | string_list_insert(&b_by_dst, sre->pair->two->path)->util |
0a6b8712 | 1282 | = (void *)sre; |
9047ebbc MV |
1283 | } |
1284 | ||
1285 | for (i = 0, j = 0; i < a_renames->nr || j < b_renames->nr;) { | |
8e24cbae | 1286 | struct string_list *renames1, *renames2Dst; |
9047ebbc MV |
1287 | struct rename *ren1 = NULL, *ren2 = NULL; |
1288 | const char *branch1, *branch2; | |
1289 | const char *ren1_src, *ren1_dst; | |
461f5041 | 1290 | struct string_list_item *lookup; |
9047ebbc MV |
1291 | |
1292 | if (i >= a_renames->nr) { | |
9047ebbc MV |
1293 | ren2 = b_renames->items[j++].util; |
1294 | } else if (j >= b_renames->nr) { | |
9047ebbc MV |
1295 | ren1 = a_renames->items[i++].util; |
1296 | } else { | |
8e24cbae BK |
1297 | int compare = strcmp(a_renames->items[i].string, |
1298 | b_renames->items[j].string); | |
9047ebbc MV |
1299 | if (compare <= 0) |
1300 | ren1 = a_renames->items[i++].util; | |
1301 | if (compare >= 0) | |
1302 | ren2 = b_renames->items[j++].util; | |
1303 | } | |
1304 | ||
1305 | /* TODO: refactor, so that 1/2 are not needed */ | |
1306 | if (ren1) { | |
1307 | renames1 = a_renames; | |
9047ebbc | 1308 | renames2Dst = &b_by_dst; |
8a2fce18 MV |
1309 | branch1 = o->branch1; |
1310 | branch2 = o->branch2; | |
9047ebbc MV |
1311 | } else { |
1312 | struct rename *tmp; | |
1313 | renames1 = b_renames; | |
9047ebbc | 1314 | renames2Dst = &a_by_dst; |
8a2fce18 MV |
1315 | branch1 = o->branch2; |
1316 | branch2 = o->branch1; | |
9047ebbc MV |
1317 | tmp = ren2; |
1318 | ren2 = ren1; | |
1319 | ren1 = tmp; | |
1320 | } | |
9047ebbc | 1321 | |
9047ebbc MV |
1322 | if (ren1->processed) |
1323 | continue; | |
1324 | ren1->processed = 1; | |
9047ebbc | 1325 | ren1->dst_entry->processed = 1; |
7769a75e EN |
1326 | /* BUG: We should only mark src_entry as processed if we |
1327 | * are not dealing with a rename + add-source case. | |
1328 | */ | |
9047ebbc | 1329 | ren1->src_entry->processed = 1; |
9047ebbc MV |
1330 | |
1331 | ren1_src = ren1->pair->one->path; | |
1332 | ren1_dst = ren1->pair->two->path; | |
1333 | ||
1334 | if (ren2) { | |
461f5041 | 1335 | /* One file renamed on both sides */ |
9047ebbc MV |
1336 | const char *ren2_src = ren2->pair->one->path; |
1337 | const char *ren2_dst = ren2->pair->two->path; | |
4f66dade | 1338 | enum rename_type rename_type; |
9047ebbc | 1339 | if (strcmp(ren1_src, ren2_src) != 0) |
461f5041 | 1340 | die("ren1_src != ren2_src"); |
9047ebbc MV |
1341 | ren2->dst_entry->processed = 1; |
1342 | ren2->processed = 1; | |
1343 | if (strcmp(ren1_dst, ren2_dst) != 0) { | |
4f66dade | 1344 | rename_type = RENAME_ONE_FILE_TO_TWO; |
461f5041 | 1345 | clean_merge = 0; |
9047ebbc | 1346 | } else { |
4f66dade | 1347 | rename_type = RENAME_ONE_FILE_TO_ONE; |
7769a75e EN |
1348 | /* BUG: We should only remove ren1_src in |
1349 | * the base stage (think of rename + | |
1350 | * add-source cases). | |
1351 | */ | |
b7fa51da | 1352 | remove_file(o, 1, ren1_src, 1); |
b8ddf164 EN |
1353 | update_entry(ren1->dst_entry, |
1354 | ren1->pair->one, | |
1355 | ren1->pair->two, | |
1356 | ren2->pair->two); | |
9047ebbc | 1357 | } |
4f66dade EN |
1358 | setup_rename_conflict_info(rename_type, |
1359 | ren1->pair, | |
1360 | ren2->pair, | |
1361 | branch1, | |
1362 | branch2, | |
1363 | ren1->dst_entry, | |
232c635f EN |
1364 | ren2->dst_entry, |
1365 | o, | |
1366 | NULL, | |
1367 | NULL); | |
461f5041 EN |
1368 | } else if ((lookup = string_list_lookup(renames2Dst, ren1_dst))) { |
1369 | /* Two different files renamed to the same thing */ | |
1370 | char *ren2_dst; | |
1371 | ren2 = lookup->util; | |
1372 | ren2_dst = ren2->pair->two->path; | |
1373 | if (strcmp(ren1_dst, ren2_dst) != 0) | |
1374 | die("ren1_dst != ren2_dst"); | |
1375 | ||
1376 | clean_merge = 0; | |
1377 | ren2->processed = 1; | |
1378 | /* | |
1379 | * BUG: We should only mark src_entry as processed | |
1380 | * if we are not dealing with a rename + add-source | |
1381 | * case. | |
1382 | */ | |
1383 | ren2->src_entry->processed = 1; | |
1384 | ||
1385 | setup_rename_conflict_info(RENAME_TWO_FILES_TO_ONE, | |
1386 | ren1->pair, | |
1387 | ren2->pair, | |
1388 | branch1, | |
1389 | branch2, | |
1390 | ren1->dst_entry, | |
232c635f EN |
1391 | ren2->dst_entry, |
1392 | o, | |
1393 | ren1->src_entry, | |
1394 | ren2->src_entry); | |
1395 | ||
9047ebbc MV |
1396 | } else { |
1397 | /* Renamed in 1, maybe changed in 2 */ | |
9047ebbc MV |
1398 | /* we only use sha1 and mode of these */ |
1399 | struct diff_filespec src_other, dst_other; | |
41d70bd6 | 1400 | int try_merge; |
9047ebbc | 1401 | |
41d70bd6 EN |
1402 | /* |
1403 | * unpack_trees loads entries from common-commit | |
1404 | * into stage 1, from head-commit into stage 2, and | |
1405 | * from merge-commit into stage 3. We keep track | |
1406 | * of which side corresponds to the rename. | |
1407 | */ | |
1408 | int renamed_stage = a_renames == renames1 ? 2 : 3; | |
1409 | int other_stage = a_renames == renames1 ? 3 : 2; | |
9047ebbc | 1410 | |
7769a75e EN |
1411 | /* BUG: We should only remove ren1_src in the base |
1412 | * stage and in other_stage (think of rename + | |
1413 | * add-source case). | |
1414 | */ | |
531357a4 EN |
1415 | remove_file(o, 1, ren1_src, |
1416 | renamed_stage == 2 || !was_tracked(ren1_src)); | |
9047ebbc | 1417 | |
41d70bd6 EN |
1418 | hashcpy(src_other.sha1, ren1->src_entry->stages[other_stage].sha); |
1419 | src_other.mode = ren1->src_entry->stages[other_stage].mode; | |
1420 | hashcpy(dst_other.sha1, ren1->dst_entry->stages[other_stage].sha); | |
1421 | dst_other.mode = ren1->dst_entry->stages[other_stage].mode; | |
9047ebbc MV |
1422 | try_merge = 0; |
1423 | ||
86273e57 | 1424 | if (sha_eq(src_other.sha1, null_sha1)) { |
4f66dade EN |
1425 | setup_rename_conflict_info(RENAME_DELETE, |
1426 | ren1->pair, | |
1427 | NULL, | |
1428 | branch1, | |
1429 | branch2, | |
1430 | ren1->dst_entry, | |
232c635f EN |
1431 | NULL, |
1432 | o, | |
1433 | NULL, | |
4f66dade | 1434 | NULL); |
d5af5105 SK |
1435 | } else if ((dst_other.mode == ren1->pair->two->mode) && |
1436 | sha_eq(dst_other.sha1, ren1->pair->two->sha1)) { | |
35a74abf EN |
1437 | /* |
1438 | * Added file on the other side identical to | |
1439 | * the file being renamed: clean merge. | |
1440 | * Also, there is no need to overwrite the | |
1441 | * file already in the working copy, so call | |
1442 | * update_file_flags() instead of | |
1443 | * update_file(). | |
1444 | */ | |
1445 | update_file_flags(o, | |
1446 | ren1->pair->two->sha1, | |
1447 | ren1->pair->two->mode, | |
1448 | ren1_dst, | |
1449 | 1, /* update_cache */ | |
1450 | 0 /* update_wd */); | |
9047ebbc | 1451 | } else if (!sha_eq(dst_other.sha1, null_sha1)) { |
9047ebbc MV |
1452 | clean_merge = 0; |
1453 | try_merge = 1; | |
8a2fce18 | 1454 | output(o, 1, "CONFLICT (rename/add): Rename %s->%s in %s. " |
9047ebbc MV |
1455 | "%s added in %s", |
1456 | ren1_src, ren1_dst, branch1, | |
1457 | ren1_dst, branch2); | |
c94736a2 JH |
1458 | if (o->call_depth) { |
1459 | struct merge_file_info mfi; | |
6bdaead1 EN |
1460 | mfi = merge_file(o, ren1_dst, null_sha1, 0, |
1461 | ren1->pair->two->sha1, ren1->pair->two->mode, | |
1462 | dst_other.sha1, dst_other.mode, | |
1463 | branch1, branch2); | |
c94736a2 | 1464 | output(o, 1, "Adding merged %s", ren1_dst); |
6bdaead1 | 1465 | update_file(o, 0, mfi.sha, mfi.mode, ren1_dst); |
2a669c34 | 1466 | try_merge = 0; |
c94736a2 | 1467 | } else { |
3d6b8e88 | 1468 | char *new_path = unique_path(o, ren1_dst, branch2); |
c94736a2 JH |
1469 | output(o, 1, "Adding as %s instead", new_path); |
1470 | update_file(o, 0, dst_other.sha1, dst_other.mode, new_path); | |
3d6b8e88 | 1471 | free(new_path); |
c94736a2 | 1472 | } |
9047ebbc MV |
1473 | } else |
1474 | try_merge = 1; | |
1475 | ||
1476 | if (try_merge) { | |
8a2fce18 | 1477 | struct diff_filespec *one, *a, *b; |
9047ebbc MV |
1478 | src_other.path = (char *)ren1_src; |
1479 | ||
8a2fce18 | 1480 | one = ren1->pair->one; |
9047ebbc MV |
1481 | if (a_renames == renames1) { |
1482 | a = ren1->pair->two; | |
1483 | b = &src_other; | |
1484 | } else { | |
1485 | b = ren1->pair->two; | |
1486 | a = &src_other; | |
1487 | } | |
b8ddf164 | 1488 | update_entry(ren1->dst_entry, one, a, b); |
4f66dade EN |
1489 | setup_rename_conflict_info(RENAME_NORMAL, |
1490 | ren1->pair, | |
1491 | NULL, | |
1492 | branch1, | |
1493 | NULL, | |
1494 | ren1->dst_entry, | |
232c635f EN |
1495 | NULL, |
1496 | o, | |
1497 | NULL, | |
4f66dade | 1498 | NULL); |
9047ebbc MV |
1499 | } |
1500 | } | |
1501 | } | |
1502 | string_list_clear(&a_by_dst, 0); | |
1503 | string_list_clear(&b_by_dst, 0); | |
1504 | ||
1505 | return clean_merge; | |
1506 | } | |
1507 | ||
1508 | static unsigned char *stage_sha(const unsigned char *sha, unsigned mode) | |
1509 | { | |
1510 | return (is_null_sha1(sha) || mode == 0) ? NULL: (unsigned char *)sha; | |
1511 | } | |
1512 | ||
331a1838 EB |
1513 | static int read_sha1_strbuf(const unsigned char *sha1, struct strbuf *dst) |
1514 | { | |
1515 | void *buf; | |
1516 | enum object_type type; | |
1517 | unsigned long size; | |
1518 | buf = read_sha1_file(sha1, &type, &size); | |
1519 | if (!buf) | |
1520 | return error("cannot read object %s", sha1_to_hex(sha1)); | |
1521 | if (type != OBJ_BLOB) { | |
1522 | free(buf); | |
1523 | return error("object %s is not a blob", sha1_to_hex(sha1)); | |
1524 | } | |
1525 | strbuf_attach(dst, buf, size, size + 1); | |
1526 | return 0; | |
1527 | } | |
1528 | ||
1529 | static int blob_unchanged(const unsigned char *o_sha, | |
1530 | const unsigned char *a_sha, | |
3e7589b7 | 1531 | int renormalize, const char *path) |
331a1838 EB |
1532 | { |
1533 | struct strbuf o = STRBUF_INIT; | |
1534 | struct strbuf a = STRBUF_INIT; | |
1535 | int ret = 0; /* assume changed for safety */ | |
1536 | ||
1537 | if (sha_eq(o_sha, a_sha)) | |
1538 | return 1; | |
3e7589b7 | 1539 | if (!renormalize) |
331a1838 EB |
1540 | return 0; |
1541 | ||
1542 | assert(o_sha && a_sha); | |
1543 | if (read_sha1_strbuf(o_sha, &o) || read_sha1_strbuf(a_sha, &a)) | |
1544 | goto error_return; | |
1545 | /* | |
1546 | * Note: binary | is used so that both renormalizations are | |
1547 | * performed. Comparison can be skipped if both files are | |
1548 | * unchanged since their sha1s have already been compared. | |
1549 | */ | |
1550 | if (renormalize_buffer(path, o.buf, o.len, &o) | | |
1551 | renormalize_buffer(path, a.buf, o.len, &a)) | |
1552 | ret = (o.len == a.len && !memcmp(o.buf, a.buf, o.len)); | |
1553 | ||
1554 | error_return: | |
1555 | strbuf_release(&o); | |
1556 | strbuf_release(&a); | |
1557 | return ret; | |
1558 | } | |
1559 | ||
b7033252 | 1560 | static void handle_modify_delete(struct merge_options *o, |
5e3ce663 | 1561 | const char *path, |
ec61d149 | 1562 | unsigned char *o_sha, int o_mode, |
5e3ce663 EN |
1563 | unsigned char *a_sha, int a_mode, |
1564 | unsigned char *b_sha, int b_mode) | |
1565 | { | |
b7033252 EN |
1566 | handle_change_delete(o, |
1567 | path, | |
1568 | o_sha, o_mode, | |
1569 | a_sha, a_mode, | |
1570 | b_sha, b_mode, | |
1571 | "modify", "modified"); | |
5e3ce663 EN |
1572 | } |
1573 | ||
0c4918d1 EN |
1574 | static int merge_content(struct merge_options *o, |
1575 | const char *path, | |
1576 | unsigned char *o_sha, int o_mode, | |
1577 | unsigned char *a_sha, int a_mode, | |
61b8bcae | 1578 | unsigned char *b_sha, int b_mode, |
4f66dade | 1579 | struct rename_conflict_info *rename_conflict_info) |
0c4918d1 EN |
1580 | { |
1581 | const char *reason = "content"; | |
5b448b85 | 1582 | const char *path1 = NULL, *path2 = NULL; |
0c4918d1 EN |
1583 | struct merge_file_info mfi; |
1584 | struct diff_filespec one, a, b; | |
4ab9a157 | 1585 | unsigned df_conflict_remains = 0; |
0c4918d1 EN |
1586 | |
1587 | if (!o_sha) { | |
1588 | reason = "add/add"; | |
1589 | o_sha = (unsigned char *)null_sha1; | |
1590 | } | |
1591 | one.path = a.path = b.path = (char *)path; | |
1592 | hashcpy(one.sha1, o_sha); | |
1593 | one.mode = o_mode; | |
1594 | hashcpy(a.sha1, a_sha); | |
1595 | a.mode = a_mode; | |
1596 | hashcpy(b.sha1, b_sha); | |
1597 | b.mode = b_mode; | |
1598 | ||
3c217c07 | 1599 | if (rename_conflict_info) { |
3c217c07 EN |
1600 | struct diff_filepair *pair1 = rename_conflict_info->pair1; |
1601 | ||
1602 | path1 = (o->branch1 == rename_conflict_info->branch1) ? | |
1603 | pair1->two->path : pair1->one->path; | |
1604 | /* If rename_conflict_info->pair2 != NULL, we are in | |
1605 | * RENAME_ONE_FILE_TO_ONE case. Otherwise, we have a | |
1606 | * normal rename. | |
1607 | */ | |
1608 | path2 = (rename_conflict_info->pair2 || | |
1609 | o->branch2 == rename_conflict_info->branch1) ? | |
1610 | pair1->two->path : pair1->one->path; | |
3c217c07 EN |
1611 | |
1612 | if (dir_in_way(path, !o->call_depth)) | |
1613 | df_conflict_remains = 1; | |
4ab9a157 | 1614 | } |
dac47415 EN |
1615 | mfi = merge_file_special_markers(o, &one, &a, &b, |
1616 | o->branch1, path1, | |
1617 | o->branch2, path2); | |
4ab9a157 EN |
1618 | |
1619 | if (mfi.clean && !df_conflict_remains && | |
5b448b85 EN |
1620 | sha_eq(mfi.sha, a_sha) && mfi.mode == a_mode) { |
1621 | int path_renamed_outside_HEAD; | |
0c4918d1 | 1622 | output(o, 3, "Skipped %s (merged same as existing)", path); |
5b448b85 EN |
1623 | /* |
1624 | * The content merge resulted in the same file contents we | |
1625 | * already had. We can return early if those file contents | |
1626 | * are recorded at the correct path (which may not be true | |
1627 | * if the merge involves a rename). | |
1628 | */ | |
1629 | path_renamed_outside_HEAD = !path2 || !strcmp(path, path2); | |
1630 | if (!path_renamed_outside_HEAD) { | |
1631 | add_cacheinfo(mfi.mode, mfi.sha, path, | |
d45b7f40 | 1632 | 0, (!o->call_depth), 0); |
5b448b85 EN |
1633 | return mfi.clean; |
1634 | } | |
1635 | } else | |
0c4918d1 EN |
1636 | output(o, 2, "Auto-merging %s", path); |
1637 | ||
1638 | if (!mfi.clean) { | |
1639 | if (S_ISGITLINK(mfi.mode)) | |
1640 | reason = "submodule"; | |
1641 | output(o, 1, "CONFLICT (%s): Merge conflict in %s", | |
1642 | reason, path); | |
4f66dade | 1643 | if (rename_conflict_info && !df_conflict_remains) |
b8ddf164 | 1644 | update_stages(path, &one, &a, &b); |
0c4918d1 EN |
1645 | } |
1646 | ||
4ab9a157 | 1647 | if (df_conflict_remains) { |
3d6b8e88 | 1648 | char *new_path; |
51931bf0 EN |
1649 | if (o->call_depth) { |
1650 | remove_file_from_cache(path); | |
1651 | } else { | |
1652 | if (!mfi.clean) | |
1653 | update_stages(path, &one, &a, &b); | |
1654 | else { | |
1655 | int file_from_stage2 = was_tracked(path); | |
1656 | struct diff_filespec merged; | |
1657 | hashcpy(merged.sha1, mfi.sha); | |
1658 | merged.mode = mfi.mode; | |
1659 | ||
1660 | update_stages(path, NULL, | |
1661 | file_from_stage2 ? &merged : NULL, | |
1662 | file_from_stage2 ? NULL : &merged); | |
1663 | } | |
1664 | ||
1665 | } | |
4f66dade | 1666 | new_path = unique_path(o, path, rename_conflict_info->branch1); |
4ab9a157 | 1667 | output(o, 1, "Adding as %s instead", new_path); |
51931bf0 | 1668 | update_file(o, 0, mfi.sha, mfi.mode, new_path); |
3d6b8e88 | 1669 | free(new_path); |
51931bf0 | 1670 | mfi.clean = 0; |
4ab9a157 EN |
1671 | } else { |
1672 | update_file(o, mfi.clean, mfi.sha, mfi.mode, path); | |
1673 | } | |
0c4918d1 EN |
1674 | return mfi.clean; |
1675 | ||
1676 | } | |
1677 | ||
9047ebbc | 1678 | /* Per entry merge function */ |
8a2fce18 MV |
1679 | static int process_entry(struct merge_options *o, |
1680 | const char *path, struct stage_data *entry) | |
9047ebbc MV |
1681 | { |
1682 | /* | |
1683 | printf("processing entry, clean cache: %s\n", index_only ? "yes": "no"); | |
1684 | print_index_entry("\tpath: ", entry); | |
1685 | */ | |
1686 | int clean_merge = 1; | |
1bc0ab7c | 1687 | int normalize = o->renormalize; |
9047ebbc MV |
1688 | unsigned o_mode = entry->stages[1].mode; |
1689 | unsigned a_mode = entry->stages[2].mode; | |
1690 | unsigned b_mode = entry->stages[3].mode; | |
1691 | unsigned char *o_sha = stage_sha(entry->stages[1].sha, o_mode); | |
1692 | unsigned char *a_sha = stage_sha(entry->stages[2].sha, a_mode); | |
1693 | unsigned char *b_sha = stage_sha(entry->stages[3].sha, b_mode); | |
1694 | ||
37348937 | 1695 | entry->processed = 1; |
4f66dade EN |
1696 | if (entry->rename_conflict_info) { |
1697 | struct rename_conflict_info *conflict_info = entry->rename_conflict_info; | |
07413c5a | 1698 | switch (conflict_info->rename_type) { |
882fd11a | 1699 | case RENAME_NORMAL: |
4f66dade | 1700 | case RENAME_ONE_FILE_TO_ONE: |
882fd11a EN |
1701 | clean_merge = merge_content(o, path, |
1702 | o_sha, o_mode, a_sha, a_mode, b_sha, b_mode, | |
4f66dade | 1703 | conflict_info); |
882fd11a | 1704 | break; |
3b130adf EN |
1705 | case RENAME_DELETE: |
1706 | clean_merge = 0; | |
1707 | conflict_rename_delete(o, conflict_info->pair1, | |
1708 | conflict_info->branch1, | |
1709 | conflict_info->branch2); | |
1710 | break; | |
07413c5a | 1711 | case RENAME_ONE_FILE_TO_TWO: |
07413c5a | 1712 | clean_merge = 0; |
a99b7f22 | 1713 | conflict_rename_rename_1to2(o, conflict_info); |
07413c5a | 1714 | break; |
461f5041 EN |
1715 | case RENAME_TWO_FILES_TO_ONE: |
1716 | clean_merge = 0; | |
1717 | conflict_rename_rename_2to1(o, conflict_info); | |
07413c5a EN |
1718 | break; |
1719 | default: | |
1720 | entry->processed = 0; | |
1721 | break; | |
1722 | } | |
71f7ffcc | 1723 | } else if (o_sha && (!a_sha || !b_sha)) { |
edd2faf5 EN |
1724 | /* Case A: Deleted in one */ |
1725 | if ((!a_sha && !b_sha) || | |
1726 | (!b_sha && blob_unchanged(o_sha, a_sha, normalize, path)) || | |
1727 | (!a_sha && blob_unchanged(o_sha, b_sha, normalize, path))) { | |
1728 | /* Deleted in both or deleted in one and | |
1729 | * unchanged in the other */ | |
1730 | if (a_sha) | |
1731 | output(o, 2, "Removing %s", path); | |
1732 | /* do not touch working file if it did not exist */ | |
1733 | remove_file(o, 1, path, !a_sha); | |
1734 | } else { | |
1735 | /* Modify/delete; deleted side may have put a directory in the way */ | |
edd2faf5 | 1736 | clean_merge = 0; |
b7033252 | 1737 | handle_modify_delete(o, path, o_sha, o_mode, |
edd2faf5 | 1738 | a_sha, a_mode, b_sha, b_mode); |
3d6b8e88 | 1739 | } |
edd2faf5 EN |
1740 | } else if ((!o_sha && a_sha && !b_sha) || |
1741 | (!o_sha && !a_sha && b_sha)) { | |
1742 | /* Case B: Added in one. */ | |
1743 | /* [nothing|directory] -> ([nothing|directory], file) */ | |
1744 | ||
9c0bbb50 EN |
1745 | const char *add_branch; |
1746 | const char *other_branch; | |
1747 | unsigned mode; | |
1748 | const unsigned char *sha; | |
1749 | const char *conf; | |
37348937 | 1750 | |
9c0bbb50 EN |
1751 | if (a_sha) { |
1752 | add_branch = o->branch1; | |
1753 | other_branch = o->branch2; | |
1754 | mode = a_mode; | |
1755 | sha = a_sha; | |
1756 | conf = "file/directory"; | |
1757 | } else { | |
1758 | add_branch = o->branch2; | |
1759 | other_branch = o->branch1; | |
1760 | mode = b_mode; | |
1761 | sha = b_sha; | |
1762 | conf = "directory/file"; | |
1763 | } | |
f2507b4e | 1764 | if (dir_in_way(path, !o->call_depth)) { |
3d6b8e88 | 1765 | char *new_path = unique_path(o, path, add_branch); |
9c0bbb50 EN |
1766 | clean_merge = 0; |
1767 | output(o, 1, "CONFLICT (%s): There is a directory with name %s in %s. " | |
1768 | "Adding %s as %s", | |
1769 | conf, path, other_branch, path, new_path); | |
51931bf0 EN |
1770 | if (o->call_depth) |
1771 | remove_file_from_cache(path); | |
9c0bbb50 | 1772 | update_file(o, 0, sha, mode, new_path); |
7b1c610f EN |
1773 | if (o->call_depth) |
1774 | remove_file_from_cache(path); | |
3d6b8e88 | 1775 | free(new_path); |
9c0bbb50 EN |
1776 | } else { |
1777 | output(o, 2, "Adding %s", path); | |
35a74abf EN |
1778 | /* do not overwrite file if already present */ |
1779 | update_file_flags(o, sha, mode, path, 1, !a_sha); | |
9c0bbb50 | 1780 | } |
edd2faf5 EN |
1781 | } else if (a_sha && b_sha) { |
1782 | /* Case C: Added in both (check for same permissions) and */ | |
1783 | /* case D: Modified in both, but differently. */ | |
4f66dade | 1784 | clean_merge = merge_content(o, path, |
edd2faf5 EN |
1785 | o_sha, o_mode, a_sha, a_mode, b_sha, b_mode, |
1786 | NULL); | |
1787 | } else if (!o_sha && !a_sha && !b_sha) { | |
1788 | /* | |
1789 | * this entry was deleted altogether. a_mode == 0 means | |
1790 | * we had that path and want to actively remove it. | |
1791 | */ | |
1792 | remove_file(o, 1, path, !a_mode); | |
1793 | } else | |
1794 | die("Fatal merge failure, shouldn't happen."); | |
37348937 EN |
1795 | |
1796 | return clean_merge; | |
1797 | } | |
1798 | ||
8a2fce18 MV |
1799 | int merge_trees(struct merge_options *o, |
1800 | struct tree *head, | |
9047ebbc MV |
1801 | struct tree *merge, |
1802 | struct tree *common, | |
9047ebbc MV |
1803 | struct tree **result) |
1804 | { | |
1805 | int code, clean; | |
1806 | ||
85e51b78 JH |
1807 | if (o->subtree_shift) { |
1808 | merge = shift_tree_object(head, merge, o->subtree_shift); | |
1809 | common = shift_tree_object(head, common, o->subtree_shift); | |
9047ebbc MV |
1810 | } |
1811 | ||
1812 | if (sha_eq(common->object.sha1, merge->object.sha1)) { | |
5e5ffa09 | 1813 | output(o, 0, "Already up-to-date!"); |
9047ebbc MV |
1814 | *result = head; |
1815 | return 1; | |
1816 | } | |
1817 | ||
b7fa51da | 1818 | code = git_merge_trees(o->call_depth, common, head, merge); |
9047ebbc | 1819 | |
fadd069d JH |
1820 | if (code != 0) { |
1821 | if (show(o, 4) || o->call_depth) | |
1822 | die("merging of trees %s and %s failed", | |
1823 | sha1_to_hex(head->object.sha1), | |
1824 | sha1_to_hex(merge->object.sha1)); | |
1825 | else | |
1826 | exit(128); | |
1827 | } | |
9047ebbc MV |
1828 | |
1829 | if (unmerged_cache()) { | |
1830 | struct string_list *entries, *re_head, *re_merge; | |
1831 | int i; | |
696ee23c MV |
1832 | string_list_clear(&o->current_file_set, 1); |
1833 | string_list_clear(&o->current_directory_set, 1); | |
1834 | get_files_dirs(o, head); | |
1835 | get_files_dirs(o, merge); | |
9047ebbc MV |
1836 | |
1837 | entries = get_unmerged(); | |
70cc3d36 | 1838 | record_df_conflict_files(o, entries); |
8a2fce18 MV |
1839 | re_head = get_renames(o, head, common, head, merge, entries); |
1840 | re_merge = get_renames(o, merge, common, head, merge, entries); | |
1841 | clean = process_renames(o, re_head, re_merge); | |
edd2faf5 | 1842 | for (i = entries->nr-1; 0 <= i; i--) { |
9047ebbc MV |
1843 | const char *path = entries->items[i].string; |
1844 | struct stage_data *e = entries->items[i].util; | |
1845 | if (!e->processed | |
8a2fce18 | 1846 | && !process_entry(o, path, e)) |
9047ebbc MV |
1847 | clean = 0; |
1848 | } | |
7edba4c4 JH |
1849 | for (i = 0; i < entries->nr; i++) { |
1850 | struct stage_data *e = entries->items[i].util; | |
1851 | if (!e->processed) | |
1852 | die("Unprocessed path??? %s", | |
1853 | entries->items[i].string); | |
1854 | } | |
9047ebbc MV |
1855 | |
1856 | string_list_clear(re_merge, 0); | |
1857 | string_list_clear(re_head, 0); | |
1858 | string_list_clear(entries, 1); | |
1859 | ||
1860 | } | |
1861 | else | |
1862 | clean = 1; | |
1863 | ||
b7fa51da | 1864 | if (o->call_depth) |
8a2fce18 | 1865 | *result = write_tree_from_memory(o); |
9047ebbc MV |
1866 | |
1867 | return clean; | |
1868 | } | |
1869 | ||
1870 | static struct commit_list *reverse_commit_list(struct commit_list *list) | |
1871 | { | |
1872 | struct commit_list *next = NULL, *current, *backup; | |
1873 | for (current = list; current; current = backup) { | |
1874 | backup = current->next; | |
1875 | current->next = next; | |
1876 | next = current; | |
1877 | } | |
1878 | return next; | |
1879 | } | |
1880 | ||
1881 | /* | |
1882 | * Merge the commits h1 and h2, return the resulting virtual | |
1883 | * commit object and a flag indicating the cleanness of the merge. | |
1884 | */ | |
8a2fce18 MV |
1885 | int merge_recursive(struct merge_options *o, |
1886 | struct commit *h1, | |
9047ebbc | 1887 | struct commit *h2, |
9047ebbc MV |
1888 | struct commit_list *ca, |
1889 | struct commit **result) | |
1890 | { | |
1891 | struct commit_list *iter; | |
1892 | struct commit *merged_common_ancestors; | |
1893 | struct tree *mrtree = mrtree; | |
1894 | int clean; | |
1895 | ||
8a2fce18 MV |
1896 | if (show(o, 4)) { |
1897 | output(o, 4, "Merging:"); | |
5033639c MV |
1898 | output_commit_title(o, h1); |
1899 | output_commit_title(o, h2); | |
9047ebbc MV |
1900 | } |
1901 | ||
1902 | if (!ca) { | |
1903 | ca = get_merge_bases(h1, h2, 1); | |
1904 | ca = reverse_commit_list(ca); | |
1905 | } | |
1906 | ||
8a2fce18 MV |
1907 | if (show(o, 5)) { |
1908 | output(o, 5, "found %u common ancestor(s):", commit_list_count(ca)); | |
9047ebbc | 1909 | for (iter = ca; iter; iter = iter->next) |
5033639c | 1910 | output_commit_title(o, iter->item); |
9047ebbc MV |
1911 | } |
1912 | ||
1913 | merged_common_ancestors = pop_commit(&ca); | |
1914 | if (merged_common_ancestors == NULL) { | |
03f622c8 JN |
1915 | /* if there is no common ancestor, use an empty tree */ |
1916 | struct tree *tree; | |
9047ebbc | 1917 | |
cba595bd | 1918 | tree = lookup_tree(EMPTY_TREE_SHA1_BIN); |
9047ebbc MV |
1919 | merged_common_ancestors = make_virtual_commit(tree, "ancestor"); |
1920 | } | |
1921 | ||
1922 | for (iter = ca; iter; iter = iter->next) { | |
8a2fce18 | 1923 | const char *saved_b1, *saved_b2; |
5033639c | 1924 | o->call_depth++; |
9047ebbc MV |
1925 | /* |
1926 | * When the merge fails, the result contains files | |
1927 | * with conflict markers. The cleanness flag is | |
1928 | * ignored, it was never actually used, as result of | |
1929 | * merge_trees has always overwritten it: the committed | |
1930 | * "conflicts" were already resolved. | |
1931 | */ | |
1932 | discard_cache(); | |
8a2fce18 MV |
1933 | saved_b1 = o->branch1; |
1934 | saved_b2 = o->branch2; | |
1935 | o->branch1 = "Temporary merge branch 1"; | |
1936 | o->branch2 = "Temporary merge branch 2"; | |
1937 | merge_recursive(o, merged_common_ancestors, iter->item, | |
1938 | NULL, &merged_common_ancestors); | |
1939 | o->branch1 = saved_b1; | |
1940 | o->branch2 = saved_b2; | |
5033639c | 1941 | o->call_depth--; |
9047ebbc MV |
1942 | |
1943 | if (!merged_common_ancestors) | |
1944 | die("merge returned no commit"); | |
1945 | } | |
1946 | ||
1947 | discard_cache(); | |
b7fa51da | 1948 | if (!o->call_depth) |
9047ebbc | 1949 | read_cache(); |
9047ebbc | 1950 | |
7ca56aa0 | 1951 | o->ancestor = "merged common ancestors"; |
8a2fce18 MV |
1952 | clean = merge_trees(o, h1->tree, h2->tree, merged_common_ancestors->tree, |
1953 | &mrtree); | |
9047ebbc | 1954 | |
b7fa51da | 1955 | if (o->call_depth) { |
9047ebbc MV |
1956 | *result = make_virtual_commit(mrtree, "merged tree"); |
1957 | commit_list_insert(h1, &(*result)->parents); | |
1958 | commit_list_insert(h2, &(*result)->parents->next); | |
1959 | } | |
c7d84924 | 1960 | flush_output(o); |
f31027c9 JH |
1961 | if (show(o, 2)) |
1962 | diff_warn_rename_limit("merge.renamelimit", | |
1963 | o->needed_rename_limit, 0); | |
9047ebbc MV |
1964 | return clean; |
1965 | } | |
1966 | ||
73118f89 SB |
1967 | static struct commit *get_ref(const unsigned char *sha1, const char *name) |
1968 | { | |
1969 | struct object *object; | |
1970 | ||
1971 | object = deref_tag(parse_object(sha1), name, strlen(name)); | |
1972 | if (!object) | |
1973 | return NULL; | |
1974 | if (object->type == OBJ_TREE) | |
1975 | return make_virtual_commit((struct tree*)object, name); | |
1976 | if (object->type != OBJ_COMMIT) | |
1977 | return NULL; | |
1978 | if (parse_commit((struct commit *)object)) | |
1979 | return NULL; | |
1980 | return (struct commit *)object; | |
1981 | } | |
1982 | ||
8a2fce18 MV |
1983 | int merge_recursive_generic(struct merge_options *o, |
1984 | const unsigned char *head, | |
1985 | const unsigned char *merge, | |
1986 | int num_base_list, | |
1987 | const unsigned char **base_list, | |
1988 | struct commit **result) | |
73118f89 SB |
1989 | { |
1990 | int clean, index_fd; | |
1991 | struct lock_file *lock = xcalloc(1, sizeof(struct lock_file)); | |
8a2fce18 MV |
1992 | struct commit *head_commit = get_ref(head, o->branch1); |
1993 | struct commit *next_commit = get_ref(merge, o->branch2); | |
73118f89 SB |
1994 | struct commit_list *ca = NULL; |
1995 | ||
1996 | if (base_list) { | |
1997 | int i; | |
8a2fce18 | 1998 | for (i = 0; i < num_base_list; ++i) { |
73118f89 | 1999 | struct commit *base; |
8a2fce18 | 2000 | if (!(base = get_ref(base_list[i], sha1_to_hex(base_list[i])))) |
73118f89 | 2001 | return error("Could not parse object '%s'", |
8a2fce18 | 2002 | sha1_to_hex(base_list[i])); |
73118f89 SB |
2003 | commit_list_insert(base, &ca); |
2004 | } | |
2005 | } | |
2006 | ||
2007 | index_fd = hold_locked_index(lock, 1); | |
8a2fce18 MV |
2008 | clean = merge_recursive(o, head_commit, next_commit, ca, |
2009 | result); | |
73118f89 SB |
2010 | if (active_cache_changed && |
2011 | (write_cache(index_fd, active_cache, active_nr) || | |
2012 | commit_locked_index(lock))) | |
2013 | return error("Unable to write index."); | |
2014 | ||
2015 | return clean ? 0 : 1; | |
2016 | } | |
2017 | ||
8a2fce18 | 2018 | static int merge_recursive_config(const char *var, const char *value, void *cb) |
9047ebbc | 2019 | { |
8a2fce18 | 2020 | struct merge_options *o = cb; |
8c2be75f | 2021 | if (!strcmp(var, "merge.verbosity")) { |
8a2fce18 | 2022 | o->verbosity = git_config_int(var, value); |
9047ebbc MV |
2023 | return 0; |
2024 | } | |
8c2be75f | 2025 | if (!strcmp(var, "diff.renamelimit")) { |
8a2fce18 | 2026 | o->diff_rename_limit = git_config_int(var, value); |
9047ebbc MV |
2027 | return 0; |
2028 | } | |
8c2be75f | 2029 | if (!strcmp(var, "merge.renamelimit")) { |
8a2fce18 | 2030 | o->merge_rename_limit = git_config_int(var, value); |
9047ebbc MV |
2031 | return 0; |
2032 | } | |
e137a892 | 2033 | return git_xmerge_config(var, value, cb); |
9047ebbc MV |
2034 | } |
2035 | ||
8a2fce18 | 2036 | void init_merge_options(struct merge_options *o) |
9047ebbc | 2037 | { |
8a2fce18 MV |
2038 | memset(o, 0, sizeof(struct merge_options)); |
2039 | o->verbosity = 2; | |
2040 | o->buffer_output = 1; | |
2041 | o->diff_rename_limit = -1; | |
2042 | o->merge_rename_limit = -1; | |
7610fa57 | 2043 | o->renormalize = 0; |
8a2fce18 | 2044 | git_config(merge_recursive_config, o); |
9047ebbc | 2045 | if (getenv("GIT_MERGE_VERBOSITY")) |
8a2fce18 | 2046 | o->verbosity = |
9047ebbc | 2047 | strtol(getenv("GIT_MERGE_VERBOSITY"), NULL, 10); |
8a2fce18 MV |
2048 | if (o->verbosity >= 5) |
2049 | o->buffer_output = 0; | |
c7d84924 | 2050 | strbuf_init(&o->obuf, 0); |
696ee23c MV |
2051 | memset(&o->current_file_set, 0, sizeof(struct string_list)); |
2052 | o->current_file_set.strdup_strings = 1; | |
2053 | memset(&o->current_directory_set, 0, sizeof(struct string_list)); | |
2054 | o->current_directory_set.strdup_strings = 1; | |
70cc3d36 EN |
2055 | memset(&o->df_conflict_file_set, 0, sizeof(struct string_list)); |
2056 | o->df_conflict_file_set.strdup_strings = 1; | |
9047ebbc | 2057 | } |
635a7bb1 JN |
2058 | |
2059 | int parse_merge_opt(struct merge_options *o, const char *s) | |
2060 | { | |
2061 | if (!s || !*s) | |
2062 | return -1; | |
2063 | if (!strcmp(s, "ours")) | |
2064 | o->recursive_variant = MERGE_RECURSIVE_OURS; | |
2065 | else if (!strcmp(s, "theirs")) | |
2066 | o->recursive_variant = MERGE_RECURSIVE_THEIRS; | |
2067 | else if (!strcmp(s, "subtree")) | |
2068 | o->subtree_shift = ""; | |
2069 | else if (!prefixcmp(s, "subtree=")) | |
2070 | o->subtree_shift = s + strlen("subtree="); | |
58a1ece4 | 2071 | else if (!strcmp(s, "patience")) |
307ab20b | 2072 | o->xdl_opts = DIFF_WITH_ALG(o, PATIENCE_DIFF); |
8c912eea | 2073 | else if (!strcmp(s, "histogram")) |
307ab20b | 2074 | o->xdl_opts = DIFF_WITH_ALG(o, HISTOGRAM_DIFF); |
4e5dd044 JF |
2075 | else if (!strcmp(s, "ignore-space-change")) |
2076 | o->xdl_opts |= XDF_IGNORE_WHITESPACE_CHANGE; | |
2077 | else if (!strcmp(s, "ignore-all-space")) | |
2078 | o->xdl_opts |= XDF_IGNORE_WHITESPACE; | |
2079 | else if (!strcmp(s, "ignore-space-at-eol")) | |
2080 | o->xdl_opts |= XDF_IGNORE_WHITESPACE_AT_EOL; | |
635a7bb1 JN |
2081 | else if (!strcmp(s, "renormalize")) |
2082 | o->renormalize = 1; | |
2083 | else if (!strcmp(s, "no-renormalize")) | |
2084 | o->renormalize = 0; | |
10ae7526 KB |
2085 | else if (!prefixcmp(s, "rename-threshold=")) { |
2086 | const char *score = s + strlen("rename-threshold="); | |
2087 | if ((o->rename_score = parse_rename_score(&score)) == -1 || *score != 0) | |
2088 | return -1; | |
2089 | } | |
635a7bb1 JN |
2090 | else |
2091 | return -1; | |
2092 | return 0; | |
2093 | } |