merge-recursive: Fix code checking for D/F conflicts still being present
[git/git.git] / merge-recursive.c
CommitLineData
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"
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MV
20#include "attr.h"
21#include "merge-recursive.h"
9800c0df 22#include "dir.h"
68d03e4a 23#include "submodule.h"
9047ebbc 24
85e51b78
JH
25static 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 }
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MV
36 if (!hashcmp(two->object.sha1, shifted))
37 return two;
38 return lookup_tree(shifted);
39}
40
41/*
a6f63ae0 42 * A virtual commit has (const char *)commit->util set to the name.
9047ebbc
MV
43 */
44
2af202be 45static struct commit *make_virtual_commit(struct tree *tree, const char *comment)
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MV
46{
47 struct commit *commit = xcalloc(1, sizeof(struct commit));
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48 commit->tree = tree;
49 commit->util = (void*)comment;
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50 /* avoid warnings */
51 commit->object.parsed = 1;
52 return commit;
53}
54
55/*
56 * Since we use get_tree_entry(), which does not put the read object into
57 * the object pool, we cannot rely on a == b.
58 */
59static int sha_eq(const unsigned char *a, const unsigned char *b)
60{
61 if (!a && !b)
62 return 2;
63 return a && b && hashcmp(a, b) == 0;
64}
65
25c39363
EN
66enum rename_type {
67 RENAME_NORMAL = 0,
68 RENAME_DELETE,
69 RENAME_ONE_FILE_TO_TWO
70};
71
72struct rename_df_conflict_info {
73 enum rename_type rename_type;
74 struct diff_filepair *pair1;
75 struct diff_filepair *pair2;
76 const char *branch1;
77 const char *branch2;
78 struct stage_data *dst_entry1;
79 struct stage_data *dst_entry2;
80};
81
9047ebbc
MV
82/*
83 * Since we want to write the index eventually, we cannot reuse the index
84 * for these (temporary) data.
85 */
9cba13ca
JN
86struct stage_data {
87 struct {
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88 unsigned mode;
89 unsigned char sha[20];
90 } stages[4];
25c39363 91 struct rename_df_conflict_info *rename_df_conflict_info;
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92 unsigned processed:1;
93};
94
25c39363
EN
95static inline void setup_rename_df_conflict_info(enum rename_type rename_type,
96 struct diff_filepair *pair1,
97 struct diff_filepair *pair2,
98 const char *branch1,
99 const char *branch2,
100 struct stage_data *dst_entry1,
101 struct stage_data *dst_entry2)
102{
103 struct rename_df_conflict_info *ci = xcalloc(1, sizeof(struct rename_df_conflict_info));
104 ci->rename_type = rename_type;
105 ci->pair1 = pair1;
106 ci->branch1 = branch1;
107 ci->branch2 = branch2;
108
109 ci->dst_entry1 = dst_entry1;
110 dst_entry1->rename_df_conflict_info = ci;
111 dst_entry1->processed = 0;
112
113 assert(!pair2 == !dst_entry2);
114 if (dst_entry2) {
115 ci->dst_entry2 = dst_entry2;
116 ci->pair2 = pair2;
117 dst_entry2->rename_df_conflict_info = ci;
118 dst_entry2->processed = 0;
119 }
120}
121
8a2fce18 122static int show(struct merge_options *o, int v)
9047ebbc 123{
5033639c 124 return (!o->call_depth && o->verbosity >= v) || o->verbosity >= 5;
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125}
126
c7d84924 127static void flush_output(struct merge_options *o)
9047ebbc 128{
c7d84924
MV
129 if (o->obuf.len) {
130 fputs(o->obuf.buf, stdout);
131 strbuf_reset(&o->obuf);
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MV
132 }
133}
134
28bea9e5 135__attribute__((format (printf, 3, 4)))
8a2fce18 136static void output(struct merge_options *o, int v, const char *fmt, ...)
9047ebbc 137{
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MV
138 va_list ap;
139
8a2fce18 140 if (!show(o, v))
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MV
141 return;
142
c7d84924
MV
143 strbuf_grow(&o->obuf, o->call_depth * 2 + 2);
144 memset(o->obuf.buf + o->obuf.len, ' ', o->call_depth * 2);
145 strbuf_setlen(&o->obuf, o->obuf.len + o->call_depth * 2);
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146
147 va_start(ap, fmt);
ebeb6090 148 strbuf_vaddf(&o->obuf, fmt, ap);
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149 va_end(ap);
150
c7d84924 151 strbuf_add(&o->obuf, "\n", 1);
8a2fce18 152 if (!o->buffer_output)
c7d84924 153 flush_output(o);
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MV
154}
155
5033639c 156static void output_commit_title(struct merge_options *o, struct commit *commit)
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MV
157{
158 int i;
c7d84924 159 flush_output(o);
5033639c 160 for (i = o->call_depth; i--;)
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161 fputs(" ", stdout);
162 if (commit->util)
163 printf("virtual %s\n", (char *)commit->util);
164 else {
165 printf("%s ", find_unique_abbrev(commit->object.sha1, DEFAULT_ABBREV));
166 if (parse_commit(commit) != 0)
167 printf("(bad commit)\n");
168 else {
49b7120e
CC
169 const char *title;
170 int len = find_commit_subject(commit->buffer, &title);
171 if (len)
172 printf("%.*s\n", len, title);
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MV
173 }
174 }
175}
176
177static int add_cacheinfo(unsigned int mode, const unsigned char *sha1,
178 const char *path, int stage, int refresh, int options)
179{
180 struct cache_entry *ce;
181 ce = make_cache_entry(mode, sha1 ? sha1 : null_sha1, path, stage, refresh);
182 if (!ce)
183 return error("addinfo_cache failed for path '%s'", path);
184 return add_cache_entry(ce, options);
185}
186
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MV
187static void init_tree_desc_from_tree(struct tree_desc *desc, struct tree *tree)
188{
189 parse_tree(tree);
190 init_tree_desc(desc, tree->buffer, tree->size);
191}
192
193static int git_merge_trees(int index_only,
194 struct tree *common,
195 struct tree *head,
196 struct tree *merge)
197{
198 int rc;
199 struct tree_desc t[3];
200 struct unpack_trees_options opts;
201
202 memset(&opts, 0, sizeof(opts));
203 if (index_only)
204 opts.index_only = 1;
205 else
206 opts.update = 1;
207 opts.merge = 1;
208 opts.head_idx = 2;
209 opts.fn = threeway_merge;
210 opts.src_index = &the_index;
211 opts.dst_index = &the_index;
e294030f 212 setup_unpack_trees_porcelain(&opts, "merge");
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213
214 init_tree_desc_from_tree(t+0, common);
215 init_tree_desc_from_tree(t+1, head);
216 init_tree_desc_from_tree(t+2, merge);
217
218 rc = unpack_trees(3, t, &opts);
219 cache_tree_free(&active_cache_tree);
220 return rc;
221}
222
8a2fce18 223struct tree *write_tree_from_memory(struct merge_options *o)
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MV
224{
225 struct tree *result = NULL;
226
227 if (unmerged_cache()) {
228 int i;
19c6a4f8 229 fprintf(stderr, "BUG: There are unmerged index entries:\n");
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MV
230 for (i = 0; i < active_nr; i++) {
231 struct cache_entry *ce = active_cache[i];
232 if (ce_stage(ce))
c43ba42e 233 fprintf(stderr, "BUG: %d %.*s\n", ce_stage(ce),
19c6a4f8 234 (int)ce_namelen(ce), ce->name);
9047ebbc 235 }
19c6a4f8 236 die("Bug in merge-recursive.c");
9047ebbc
MV
237 }
238
239 if (!active_cache_tree)
240 active_cache_tree = cache_tree();
241
242 if (!cache_tree_fully_valid(active_cache_tree) &&
243 cache_tree_update(active_cache_tree,
244 active_cache, active_nr, 0, 0) < 0)
245 die("error building trees");
246
247 result = lookup_tree(active_cache_tree->sha1);
248
249 return result;
250}
251
252static int save_files_dirs(const unsigned char *sha1,
253 const char *base, int baselen, const char *path,
254 unsigned int mode, int stage, void *context)
255{
256 int len = strlen(path);
257 char *newpath = xmalloc(baselen + len + 1);
696ee23c
MV
258 struct merge_options *o = context;
259
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MV
260 memcpy(newpath, base, baselen);
261 memcpy(newpath + baselen, path, len);
262 newpath[baselen + len] = '\0';
263
264 if (S_ISDIR(mode))
78a395d3 265 string_list_insert(&o->current_directory_set, newpath);
9047ebbc 266 else
78a395d3 267 string_list_insert(&o->current_file_set, newpath);
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MV
268 free(newpath);
269
d3bee161 270 return (S_ISDIR(mode) ? READ_TREE_RECURSIVE : 0);
9047ebbc
MV
271}
272
696ee23c 273static int get_files_dirs(struct merge_options *o, struct tree *tree)
9047ebbc
MV
274{
275 int n;
696ee23c 276 if (read_tree_recursive(tree, "", 0, 0, NULL, save_files_dirs, o))
9047ebbc 277 return 0;
696ee23c 278 n = o->current_file_set.nr + o->current_directory_set.nr;
9047ebbc
MV
279 return n;
280}
281
282/*
283 * Returns an index_entry instance which doesn't have to correspond to
284 * a real cache entry in Git's index.
285 */
286static struct stage_data *insert_stage_data(const char *path,
287 struct tree *o, struct tree *a, struct tree *b,
288 struct string_list *entries)
289{
290 struct string_list_item *item;
291 struct stage_data *e = xcalloc(1, sizeof(struct stage_data));
292 get_tree_entry(o->object.sha1, path,
293 e->stages[1].sha, &e->stages[1].mode);
294 get_tree_entry(a->object.sha1, path,
295 e->stages[2].sha, &e->stages[2].mode);
296 get_tree_entry(b->object.sha1, path,
297 e->stages[3].sha, &e->stages[3].mode);
78a395d3 298 item = string_list_insert(entries, path);
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MV
299 item->util = e;
300 return e;
301}
302
303/*
304 * Create a dictionary mapping file names to stage_data objects. The
305 * dictionary contains one entry for every path with a non-zero stage entry.
306 */
307static struct string_list *get_unmerged(void)
308{
309 struct string_list *unmerged = xcalloc(1, sizeof(struct string_list));
310 int i;
311
312 unmerged->strdup_strings = 1;
313
314 for (i = 0; i < active_nr; i++) {
315 struct string_list_item *item;
316 struct stage_data *e;
317 struct cache_entry *ce = active_cache[i];
318 if (!ce_stage(ce))
319 continue;
320
e8c8b713 321 item = string_list_lookup(unmerged, ce->name);
9047ebbc 322 if (!item) {
78a395d3 323 item = string_list_insert(unmerged, ce->name);
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MV
324 item->util = xcalloc(1, sizeof(struct stage_data));
325 }
326 e = item->util;
327 e->stages[ce_stage(ce)].mode = ce->ce_mode;
328 hashcpy(e->stages[ce_stage(ce)].sha, ce->sha1);
329 }
330
331 return unmerged;
332}
333
f0fd4d05
EN
334static int string_list_df_name_compare(const void *a, const void *b)
335{
336 const struct string_list_item *one = a;
337 const struct string_list_item *two = b;
338 int onelen = strlen(one->string);
339 int twolen = strlen(two->string);
340 /*
341 * Here we only care that entries for D/F conflicts are
342 * adjacent, in particular with the file of the D/F conflict
343 * appearing before files below the corresponding directory.
344 * The order of the rest of the list is irrelevant for us.
345 *
346 * To achieve this, we sort with df_name_compare and provide
347 * the mode S_IFDIR so that D/F conflicts will sort correctly.
348 * We use the mode S_IFDIR for everything else for simplicity,
349 * since in other cases any changes in their order due to
350 * sorting cause no problems for us.
351 */
352 int cmp = df_name_compare(one->string, onelen, S_IFDIR,
353 two->string, twolen, S_IFDIR);
354 /*
355 * Now that 'foo' and 'foo/bar' compare equal, we have to make sure
356 * that 'foo' comes before 'foo/bar'.
357 */
358 if (cmp)
359 return cmp;
360 return onelen - twolen;
361}
362
363
364
ef02b317
EN
365static void make_room_for_directories_of_df_conflicts(struct merge_options *o,
366 struct string_list *entries)
367{
368 /* If there are D/F conflicts, and the paths currently exist
369 * in the working copy as a file, we want to remove them to
370 * make room for the corresponding directory. Such paths will
371 * later be processed in process_df_entry() at the end. If
372 * the corresponding directory ends up being removed by the
373 * merge, then the file will be reinstated at that time;
374 * otherwise, if the file is not supposed to be removed by the
375 * merge, the contents of the file will be placed in another
376 * unique filename.
ef02b317
EN
377 */
378 const char *last_file = NULL;
c8516500 379 int last_len = 0;
ef02b317
EN
380 int i;
381
0b30e812
EN
382 /*
383 * If we're merging merge-bases, we don't want to bother with
384 * any working directory changes.
385 */
386 if (o->call_depth)
387 return;
388
f0fd4d05
EN
389 /* Ensure D/F conflicts are adjacent in the entries list. */
390 qsort(entries->items, entries->nr, sizeof(*entries->items),
391 string_list_df_name_compare);
392
ef02b317
EN
393 for (i = 0; i < entries->nr; i++) {
394 const char *path = entries->items[i].string;
395 int len = strlen(path);
396 struct stage_data *e = entries->items[i].util;
397
398 /*
399 * Check if last_file & path correspond to a D/F conflict;
400 * i.e. whether path is last_file+'/'+<something>.
401 * If so, remove last_file to make room for path and friends.
402 */
403 if (last_file &&
404 len > last_len &&
405 memcmp(path, last_file, last_len) == 0 &&
406 path[last_len] == '/') {
407 output(o, 3, "Removing %s to make room for subdirectory; may re-add later.", last_file);
408 unlink(last_file);
409 }
410
411 /*
412 * Determine whether path could exist as a file in the
413 * working directory as a possible D/F conflict. This
414 * will only occur when it exists in stage 2 as a
415 * file.
416 */
417 if (S_ISREG(e->stages[2].mode) || S_ISLNK(e->stages[2].mode)) {
418 last_file = path;
419 last_len = len;
ef02b317
EN
420 } else {
421 last_file = NULL;
422 }
423 }
424}
425
9cba13ca 426struct rename {
9047ebbc
MV
427 struct diff_filepair *pair;
428 struct stage_data *src_entry;
429 struct stage_data *dst_entry;
430 unsigned processed:1;
431};
432
433/*
434 * Get information of all renames which occurred between 'o_tree' and
435 * 'tree'. We need the three trees in the merge ('o_tree', 'a_tree' and
436 * 'b_tree') to be able to associate the correct cache entries with
437 * the rename information. 'tree' is always equal to either a_tree or b_tree.
438 */
8a2fce18
MV
439static struct string_list *get_renames(struct merge_options *o,
440 struct tree *tree,
441 struct tree *o_tree,
442 struct tree *a_tree,
443 struct tree *b_tree,
444 struct string_list *entries)
9047ebbc
MV
445{
446 int i;
447 struct string_list *renames;
448 struct diff_options opts;
449
450 renames = xcalloc(1, sizeof(struct string_list));
451 diff_setup(&opts);
452 DIFF_OPT_SET(&opts, RECURSIVE);
453 opts.detect_rename = DIFF_DETECT_RENAME;
8a2fce18
MV
454 opts.rename_limit = o->merge_rename_limit >= 0 ? o->merge_rename_limit :
455 o->diff_rename_limit >= 0 ? o->diff_rename_limit :
92c57e5c 456 1000;
10ae7526 457 opts.rename_score = o->rename_score;
99bfc669 458 opts.show_rename_progress = o->show_rename_progress;
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MV
459 opts.output_format = DIFF_FORMAT_NO_OUTPUT;
460 if (diff_setup_done(&opts) < 0)
461 die("diff setup failed");
462 diff_tree_sha1(o_tree->object.sha1, tree->object.sha1, "", &opts);
463 diffcore_std(&opts);
bf0ab10f
JK
464 if (opts.needed_rename_limit > o->needed_rename_limit)
465 o->needed_rename_limit = opts.needed_rename_limit;
9047ebbc
MV
466 for (i = 0; i < diff_queued_diff.nr; ++i) {
467 struct string_list_item *item;
468 struct rename *re;
469 struct diff_filepair *pair = diff_queued_diff.queue[i];
470 if (pair->status != 'R') {
471 diff_free_filepair(pair);
472 continue;
473 }
474 re = xmalloc(sizeof(*re));
475 re->processed = 0;
476 re->pair = pair;
e8c8b713 477 item = string_list_lookup(entries, re->pair->one->path);
9047ebbc
MV
478 if (!item)
479 re->src_entry = insert_stage_data(re->pair->one->path,
480 o_tree, a_tree, b_tree, entries);
481 else
482 re->src_entry = item->util;
483
e8c8b713 484 item = string_list_lookup(entries, re->pair->two->path);
9047ebbc
MV
485 if (!item)
486 re->dst_entry = insert_stage_data(re->pair->two->path,
487 o_tree, a_tree, b_tree, entries);
488 else
489 re->dst_entry = item->util;
78a395d3 490 item = string_list_insert(renames, pair->one->path);
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MV
491 item->util = re;
492 }
493 opts.output_format = DIFF_FORMAT_NO_OUTPUT;
494 diff_queued_diff.nr = 0;
495 diff_flush(&opts);
496 return renames;
497}
498
650467cf
EN
499static int update_stages(const char *path, const struct diff_filespec *o,
500 const struct diff_filespec *a,
501 const struct diff_filespec *b)
9047ebbc 502{
650467cf
EN
503 int clear = 1;
504 int options = ADD_CACHE_OK_TO_ADD | ADD_CACHE_SKIP_DFCHECK;
9047ebbc
MV
505 if (clear)
506 if (remove_file_from_cache(path))
507 return -1;
508 if (o)
509 if (add_cacheinfo(o->mode, o->sha1, path, 1, 0, options))
510 return -1;
511 if (a)
512 if (add_cacheinfo(a->mode, a->sha1, path, 2, 0, options))
513 return -1;
514 if (b)
515 if (add_cacheinfo(b->mode, b->sha1, path, 3, 0, options))
516 return -1;
517 return 0;
518}
519
2ff739f9
EN
520static int update_stages_and_entry(const char *path,
521 struct stage_data *entry,
522 struct diff_filespec *o,
523 struct diff_filespec *a,
524 struct diff_filespec *b,
525 int clear)
526{
527 int options;
528
529 entry->processed = 0;
530 entry->stages[1].mode = o->mode;
531 entry->stages[2].mode = a->mode;
532 entry->stages[3].mode = b->mode;
533 hashcpy(entry->stages[1].sha, o->sha1);
534 hashcpy(entry->stages[2].sha, a->sha1);
535 hashcpy(entry->stages[3].sha, b->sha1);
650467cf 536 return update_stages(path, o, a, b);
2ff739f9
EN
537}
538
b7fa51da
MV
539static int remove_file(struct merge_options *o, int clean,
540 const char *path, int no_wd)
9047ebbc 541{
b7fa51da
MV
542 int update_cache = o->call_depth || clean;
543 int update_working_directory = !o->call_depth && !no_wd;
9047ebbc
MV
544
545 if (update_cache) {
546 if (remove_file_from_cache(path))
547 return -1;
548 }
549 if (update_working_directory) {
25755e84 550 if (remove_path(path))
9047ebbc 551 return -1;
9047ebbc
MV
552 }
553 return 0;
554}
555
696ee23c 556static char *unique_path(struct merge_options *o, const char *path, const char *branch)
9047ebbc
MV
557{
558 char *newpath = xmalloc(strlen(path) + 1 + strlen(branch) + 8 + 1);
559 int suffix = 0;
560 struct stat st;
561 char *p = newpath + strlen(path);
562 strcpy(newpath, path);
563 *(p++) = '~';
564 strcpy(p, branch);
565 for (; *p; ++p)
566 if ('/' == *p)
567 *p = '_';
696ee23c
MV
568 while (string_list_has_string(&o->current_file_set, newpath) ||
569 string_list_has_string(&o->current_directory_set, newpath) ||
9047ebbc
MV
570 lstat(newpath, &st) == 0)
571 sprintf(p, "_%d", suffix++);
572
78a395d3 573 string_list_insert(&o->current_file_set, newpath);
9047ebbc
MV
574 return newpath;
575}
576
577static void flush_buffer(int fd, const char *buf, unsigned long size)
578{
579 while (size > 0) {
580 long ret = write_in_full(fd, buf, size);
581 if (ret < 0) {
582 /* Ignore epipe */
583 if (errno == EPIPE)
584 break;
d824cbba 585 die_errno("merge-recursive");
9047ebbc
MV
586 } else if (!ret) {
587 die("merge-recursive: disk full?");
588 }
589 size -= ret;
590 buf += ret;
591 }
592}
593
f2507b4e
EN
594static int dir_in_way(const char *path, int check_working_copy)
595{
596 int pos, pathlen = strlen(path);
597 char *dirpath = xmalloc(pathlen + 2);
598 struct stat st;
599
600 strcpy(dirpath, path);
601 dirpath[pathlen] = '/';
602 dirpath[pathlen+1] = '\0';
603
604 pos = cache_name_pos(dirpath, pathlen+1);
605
606 if (pos < 0)
607 pos = -1 - pos;
608 if (pos < active_nr &&
609 !strncmp(dirpath, active_cache[pos]->name, pathlen+1)) {
610 free(dirpath);
611 return 1;
612 }
613
614 free(dirpath);
615 return check_working_copy && !lstat(path, &st) && S_ISDIR(st.st_mode);
616}
617
60c91181
JH
618static int would_lose_untracked(const char *path)
619{
620 int pos = cache_name_pos(path, strlen(path));
621
622 if (pos < 0)
623 pos = -1 - pos;
624 while (pos < active_nr &&
625 !strcmp(path, active_cache[pos]->name)) {
626 /*
627 * If stage #0, it is definitely tracked.
628 * If it has stage #2 then it was tracked
629 * before this merge started. All other
630 * cases the path was not tracked.
631 */
632 switch (ce_stage(active_cache[pos])) {
633 case 0:
634 case 2:
635 return 0;
636 }
637 pos++;
638 }
639 return file_exists(path);
640}
641
9047ebbc
MV
642static int make_room_for_path(const char *path)
643{
644 int status;
645 const char *msg = "failed to create path '%s'%s";
646
647 status = safe_create_leading_directories_const(path);
648 if (status) {
649 if (status == -3) {
650 /* something else exists */
651 error(msg, path, ": perhaps a D/F conflict?");
652 return -1;
653 }
654 die(msg, path, "");
655 }
656
60c91181
JH
657 /*
658 * Do not unlink a file in the work tree if we are not
659 * tracking it.
660 */
661 if (would_lose_untracked(path))
662 return error("refusing to lose untracked file at '%s'",
663 path);
664
9047ebbc
MV
665 /* Successful unlink is good.. */
666 if (!unlink(path))
667 return 0;
668 /* .. and so is no existing file */
669 if (errno == ENOENT)
670 return 0;
671 /* .. but not some other error (who really cares what?) */
672 return error(msg, path, ": perhaps a D/F conflict?");
673}
674
b7fa51da
MV
675static void update_file_flags(struct merge_options *o,
676 const unsigned char *sha,
9047ebbc
MV
677 unsigned mode,
678 const char *path,
679 int update_cache,
680 int update_wd)
681{
b7fa51da 682 if (o->call_depth)
9047ebbc
MV
683 update_wd = 0;
684
685 if (update_wd) {
686 enum object_type type;
687 void *buf;
688 unsigned long size;
689
68d03e4a 690 if (S_ISGITLINK(mode)) {
0c44c943
JH
691 /*
692 * We may later decide to recursively descend into
693 * the submodule directory and update its index
694 * and/or work tree, but we do not do that now.
695 */
68d03e4a 696 update_wd = 0;
0c44c943 697 goto update_index;
68d03e4a 698 }
9047ebbc
MV
699
700 buf = read_sha1_file(sha, &type, &size);
701 if (!buf)
702 die("cannot read object %s '%s'", sha1_to_hex(sha), path);
703 if (type != OBJ_BLOB)
704 die("blob expected for %s '%s'", sha1_to_hex(sha), path);
705 if (S_ISREG(mode)) {
f285a2d7 706 struct strbuf strbuf = STRBUF_INIT;
9047ebbc
MV
707 if (convert_to_working_tree(path, buf, size, &strbuf)) {
708 free(buf);
709 size = strbuf.len;
710 buf = strbuf_detach(&strbuf, NULL);
711 }
712 }
713
714 if (make_room_for_path(path) < 0) {
715 update_wd = 0;
716 free(buf);
717 goto update_index;
718 }
719 if (S_ISREG(mode) || (!has_symlinks && S_ISLNK(mode))) {
720 int fd;
721 if (mode & 0100)
722 mode = 0777;
723 else
724 mode = 0666;
725 fd = open(path, O_WRONLY | O_TRUNC | O_CREAT, mode);
726 if (fd < 0)
d824cbba 727 die_errno("failed to open '%s'", path);
9047ebbc
MV
728 flush_buffer(fd, buf, size);
729 close(fd);
730 } else if (S_ISLNK(mode)) {
731 char *lnk = xmemdupz(buf, size);
732 safe_create_leading_directories_const(path);
733 unlink(path);
304dcf26 734 if (symlink(lnk, path))
d824cbba 735 die_errno("failed to symlink '%s'", path);
9047ebbc
MV
736 free(lnk);
737 } else
738 die("do not know what to do with %06o %s '%s'",
739 mode, sha1_to_hex(sha), path);
740 free(buf);
741 }
742 update_index:
743 if (update_cache)
744 add_cacheinfo(mode, sha, path, 0, update_wd, ADD_CACHE_OK_TO_ADD);
745}
746
b7fa51da
MV
747static void update_file(struct merge_options *o,
748 int clean,
9047ebbc
MV
749 const unsigned char *sha,
750 unsigned mode,
751 const char *path)
752{
b7fa51da 753 update_file_flags(o, sha, mode, path, o->call_depth || clean, !o->call_depth);
9047ebbc
MV
754}
755
756/* Low level file merging, update and removal */
757
9cba13ca 758struct merge_file_info {
9047ebbc
MV
759 unsigned char sha[20];
760 unsigned mode;
761 unsigned clean:1,
762 merge:1;
763};
764
b7fa51da
MV
765static int merge_3way(struct merge_options *o,
766 mmbuffer_t *result_buf,
0c059420
EN
767 const struct diff_filespec *one,
768 const struct diff_filespec *a,
769 const struct diff_filespec *b,
9047ebbc
MV
770 const char *branch1,
771 const char *branch2)
772{
773 mmfile_t orig, src1, src2;
712516bc 774 struct ll_merge_options ll_opts = {0};
4c5868f4 775 char *base_name, *name1, *name2;
9047ebbc 776 int merge_status;
8cc5b290 777
712516bc 778 ll_opts.renormalize = o->renormalize;
58a1ece4 779 ll_opts.xdl_opts = o->xdl_opts;
712516bc
JN
780
781 if (o->call_depth) {
782 ll_opts.virtual_ancestor = 1;
783 ll_opts.variant = 0;
784 } else {
8cc5b290
AP
785 switch (o->recursive_variant) {
786 case MERGE_RECURSIVE_OURS:
712516bc 787 ll_opts.variant = XDL_MERGE_FAVOR_OURS;
8cc5b290
AP
788 break;
789 case MERGE_RECURSIVE_THEIRS:
712516bc 790 ll_opts.variant = XDL_MERGE_FAVOR_THEIRS;
8cc5b290
AP
791 break;
792 default:
712516bc 793 ll_opts.variant = 0;
8cc5b290
AP
794 break;
795 }
796 }
9047ebbc 797
4c5868f4
JN
798 if (strcmp(a->path, b->path) ||
799 (o->ancestor != NULL && strcmp(a->path, one->path) != 0)) {
800 base_name = o->ancestor == NULL ? NULL :
801 xstrdup(mkpath("%s:%s", o->ancestor, one->path));
606475f3
MR
802 name1 = xstrdup(mkpath("%s:%s", branch1, a->path));
803 name2 = xstrdup(mkpath("%s:%s", branch2, b->path));
804 } else {
4c5868f4
JN
805 base_name = o->ancestor == NULL ? NULL :
806 xstrdup(mkpath("%s", o->ancestor));
606475f3
MR
807 name1 = xstrdup(mkpath("%s", branch1));
808 name2 = xstrdup(mkpath("%s", branch2));
809 }
9047ebbc 810
06b65939
ML
811 read_mmblob(&orig, one->sha1);
812 read_mmblob(&src1, a->sha1);
813 read_mmblob(&src2, b->sha1);
9047ebbc 814
4c5868f4 815 merge_status = ll_merge(result_buf, a->path, &orig, base_name,
712516bc 816 &src1, name1, &src2, name2, &ll_opts);
9047ebbc
MV
817
818 free(name1);
819 free(name2);
820 free(orig.ptr);
821 free(src1.ptr);
822 free(src2.ptr);
823 return merge_status;
824}
825
b7fa51da 826static struct merge_file_info merge_file(struct merge_options *o,
0c059420
EN
827 const struct diff_filespec *one,
828 const struct diff_filespec *a,
829 const struct diff_filespec *b,
b7fa51da
MV
830 const char *branch1,
831 const char *branch2)
9047ebbc
MV
832{
833 struct merge_file_info result;
834 result.merge = 0;
835 result.clean = 1;
836
837 if ((S_IFMT & a->mode) != (S_IFMT & b->mode)) {
838 result.clean = 0;
839 if (S_ISREG(a->mode)) {
840 result.mode = a->mode;
841 hashcpy(result.sha, a->sha1);
842 } else {
843 result.mode = b->mode;
844 hashcpy(result.sha, b->sha1);
845 }
846 } else {
b7fa51da 847 if (!sha_eq(a->sha1, one->sha1) && !sha_eq(b->sha1, one->sha1))
9047ebbc
MV
848 result.merge = 1;
849
850 /*
851 * Merge modes
852 */
b7fa51da 853 if (a->mode == b->mode || a->mode == one->mode)
9047ebbc
MV
854 result.mode = b->mode;
855 else {
856 result.mode = a->mode;
b7fa51da 857 if (b->mode != one->mode) {
9047ebbc
MV
858 result.clean = 0;
859 result.merge = 1;
860 }
861 }
862
b7fa51da 863 if (sha_eq(a->sha1, b->sha1) || sha_eq(a->sha1, one->sha1))
9047ebbc 864 hashcpy(result.sha, b->sha1);
b7fa51da 865 else if (sha_eq(b->sha1, one->sha1))
9047ebbc
MV
866 hashcpy(result.sha, a->sha1);
867 else if (S_ISREG(a->mode)) {
868 mmbuffer_t result_buf;
869 int merge_status;
870
b7fa51da 871 merge_status = merge_3way(o, &result_buf, one, a, b,
9047ebbc
MV
872 branch1, branch2);
873
874 if ((merge_status < 0) || !result_buf.ptr)
875 die("Failed to execute internal merge");
876
877 if (write_sha1_file(result_buf.ptr, result_buf.size,
878 blob_type, result.sha))
879 die("Unable to add %s to database",
880 a->path);
881
882 free(result_buf.ptr);
883 result.clean = (merge_status == 0);
884 } else if (S_ISGITLINK(a->mode)) {
68d03e4a
HV
885 result.clean = merge_submodule(result.sha, one->path, one->sha1,
886 a->sha1, b->sha1);
9047ebbc
MV
887 } else if (S_ISLNK(a->mode)) {
888 hashcpy(result.sha, a->sha1);
889
890 if (!sha_eq(a->sha1, b->sha1))
891 result.clean = 0;
892 } else {
893 die("unsupported object type in the tree");
894 }
895 }
896
897 return result;
898}
899
6ef2cb00
EN
900static void conflict_rename_delete(struct merge_options *o,
901 struct diff_filepair *pair,
902 const char *rename_branch,
903 const char *other_branch)
9047ebbc 904{
6ef2cb00 905 char *dest_name = pair->two->path;
a0de2f6b 906 int df_conflict = 0;
6ef2cb00
EN
907
908 output(o, 1, "CONFLICT (rename/delete): Rename %s->%s in %s "
909 "and deleted in %s",
910 pair->one->path, pair->two->path, rename_branch,
911 other_branch);
912 if (!o->call_depth)
913 update_stages(dest_name, NULL,
914 rename_branch == o->branch1 ? pair->two : NULL,
650467cf 915 rename_branch == o->branch1 ? NULL : pair->two);
f2507b4e 916 if (dir_in_way(dest_name, !o->call_depth)) {
a0de2f6b
EN
917 dest_name = unique_path(o, dest_name, rename_branch);
918 df_conflict = 1;
919 }
6ef2cb00 920 update_file(o, 0, pair->two->sha1, pair->two->mode, dest_name);
a0de2f6b
EN
921 if (df_conflict)
922 free(dest_name);
6ef2cb00
EN
923}
924
09c01f85 925static void conflict_rename_rename_1to2(struct merge_options *o,
36de1704 926 struct diff_filepair *pair1,
09c01f85 927 const char *branch1,
36de1704 928 struct diff_filepair *pair2,
09c01f85 929 const char *branch2)
9047ebbc 930{
09c01f85 931 /* One file was renamed in both branches, but to different names. */
9047ebbc
MV
932 char *del[2];
933 int delp = 0;
36de1704
EN
934 const char *ren1_dst = pair1->two->path;
935 const char *ren2_dst = pair2->two->path;
9047ebbc
MV
936 const char *dst_name1 = ren1_dst;
937 const char *dst_name2 = ren2_dst;
f2507b4e 938 if (dir_in_way(ren1_dst, !o->call_depth)) {
696ee23c 939 dst_name1 = del[delp++] = unique_path(o, ren1_dst, branch1);
8a2fce18 940 output(o, 1, "%s is a directory in %s adding as %s instead",
9047ebbc 941 ren1_dst, branch2, dst_name1);
9047ebbc 942 }
f2507b4e 943 if (dir_in_way(ren2_dst, !o->call_depth)) {
696ee23c 944 dst_name2 = del[delp++] = unique_path(o, ren2_dst, branch2);
8a2fce18 945 output(o, 1, "%s is a directory in %s adding as %s instead",
9047ebbc 946 ren2_dst, branch1, dst_name2);
9047ebbc 947 }
b7fa51da 948 if (o->call_depth) {
9047ebbc
MV
949 remove_file_from_cache(dst_name1);
950 remove_file_from_cache(dst_name2);
951 /*
952 * Uncomment to leave the conflicting names in the resulting tree
953 *
36de1704
EN
954 * update_file(o, 0, pair1->two->sha1, pair1->two->mode, dst_name1);
955 * update_file(o, 0, pair2->two->sha1, pair2->two->mode, dst_name2);
9047ebbc
MV
956 */
957 } else {
650467cf
EN
958 update_stages(ren1_dst, NULL, pair1->two, NULL);
959 update_stages(ren2_dst, NULL, NULL, pair2->two);
07413c5a
EN
960
961 update_file(o, 0, pair1->two->sha1, pair1->two->mode, dst_name1);
962 update_file(o, 0, pair2->two->sha1, pair2->two->mode, dst_name2);
9047ebbc
MV
963 }
964 while (delp--)
965 free(del[delp]);
966}
967
09c01f85
EN
968static void conflict_rename_rename_2to1(struct merge_options *o,
969 struct rename *ren1,
970 const char *branch1,
971 struct rename *ren2,
972 const char *branch2)
9047ebbc 973{
09c01f85 974 /* Two files were renamed to the same thing. */
696ee23c
MV
975 char *new_path1 = unique_path(o, ren1->pair->two->path, branch1);
976 char *new_path2 = unique_path(o, ren2->pair->two->path, branch2);
8a2fce18 977 output(o, 1, "Renaming %s to %s and %s to %s instead",
9047ebbc
MV
978 ren1->pair->one->path, new_path1,
979 ren2->pair->one->path, new_path2);
b7fa51da
MV
980 remove_file(o, 0, ren1->pair->two->path, 0);
981 update_file(o, 0, ren1->pair->two->sha1, ren1->pair->two->mode, new_path1);
982 update_file(o, 0, ren2->pair->two->sha1, ren2->pair->two->mode, new_path2);
9047ebbc
MV
983 free(new_path2);
984 free(new_path1);
985}
986
8a2fce18
MV
987static int process_renames(struct merge_options *o,
988 struct string_list *a_renames,
989 struct string_list *b_renames)
9047ebbc
MV
990{
991 int clean_merge = 1, i, j;
183113a5
TF
992 struct string_list a_by_dst = STRING_LIST_INIT_NODUP;
993 struct string_list b_by_dst = STRING_LIST_INIT_NODUP;
9047ebbc
MV
994 const struct rename *sre;
995
996 for (i = 0; i < a_renames->nr; i++) {
997 sre = a_renames->items[i].util;
78a395d3 998 string_list_insert(&a_by_dst, sre->pair->two->path)->util
9047ebbc
MV
999 = sre->dst_entry;
1000 }
1001 for (i = 0; i < b_renames->nr; i++) {
1002 sre = b_renames->items[i].util;
78a395d3 1003 string_list_insert(&b_by_dst, sre->pair->two->path)->util
9047ebbc
MV
1004 = sre->dst_entry;
1005 }
1006
1007 for (i = 0, j = 0; i < a_renames->nr || j < b_renames->nr;) {
8e24cbae 1008 struct string_list *renames1, *renames2Dst;
9047ebbc
MV
1009 struct rename *ren1 = NULL, *ren2 = NULL;
1010 const char *branch1, *branch2;
1011 const char *ren1_src, *ren1_dst;
1012
1013 if (i >= a_renames->nr) {
9047ebbc
MV
1014 ren2 = b_renames->items[j++].util;
1015 } else if (j >= b_renames->nr) {
9047ebbc
MV
1016 ren1 = a_renames->items[i++].util;
1017 } else {
8e24cbae
BK
1018 int compare = strcmp(a_renames->items[i].string,
1019 b_renames->items[j].string);
9047ebbc
MV
1020 if (compare <= 0)
1021 ren1 = a_renames->items[i++].util;
1022 if (compare >= 0)
1023 ren2 = b_renames->items[j++].util;
1024 }
1025
1026 /* TODO: refactor, so that 1/2 are not needed */
1027 if (ren1) {
1028 renames1 = a_renames;
9047ebbc 1029 renames2Dst = &b_by_dst;
8a2fce18
MV
1030 branch1 = o->branch1;
1031 branch2 = o->branch2;
9047ebbc
MV
1032 } else {
1033 struct rename *tmp;
1034 renames1 = b_renames;
9047ebbc 1035 renames2Dst = &a_by_dst;
8a2fce18
MV
1036 branch1 = o->branch2;
1037 branch2 = o->branch1;
9047ebbc
MV
1038 tmp = ren2;
1039 ren2 = ren1;
1040 ren1 = tmp;
1041 }
9047ebbc
MV
1042
1043 ren1->dst_entry->processed = 1;
1044 ren1->src_entry->processed = 1;
1045
1046 if (ren1->processed)
1047 continue;
1048 ren1->processed = 1;
1049
1050 ren1_src = ren1->pair->one->path;
1051 ren1_dst = ren1->pair->two->path;
1052
1053 if (ren2) {
1054 const char *ren2_src = ren2->pair->one->path;
1055 const char *ren2_dst = ren2->pair->two->path;
1056 /* Renamed in 1 and renamed in 2 */
1057 if (strcmp(ren1_src, ren2_src) != 0)
1058 die("ren1.src != ren2.src");
1059 ren2->dst_entry->processed = 1;
1060 ren2->processed = 1;
1061 if (strcmp(ren1_dst, ren2_dst) != 0) {
07413c5a
EN
1062 setup_rename_df_conflict_info(RENAME_ONE_FILE_TO_TWO,
1063 ren1->pair,
1064 ren2->pair,
1065 branch1,
1066 branch2,
1067 ren1->dst_entry,
1068 ren2->dst_entry);
9047ebbc 1069 } else {
b7fa51da 1070 remove_file(o, 1, ren1_src, 1);
161cf7f9
EN
1071 update_stages_and_entry(ren1_dst,
1072 ren1->dst_entry,
1073 ren1->pair->one,
1074 ren1->pair->two,
1075 ren2->pair->two,
1076 1 /* clear */);
9047ebbc
MV
1077 }
1078 } else {
1079 /* Renamed in 1, maybe changed in 2 */
1080 struct string_list_item *item;
1081 /* we only use sha1 and mode of these */
1082 struct diff_filespec src_other, dst_other;
41d70bd6 1083 int try_merge;
9047ebbc 1084
41d70bd6
EN
1085 /*
1086 * unpack_trees loads entries from common-commit
1087 * into stage 1, from head-commit into stage 2, and
1088 * from merge-commit into stage 3. We keep track
1089 * of which side corresponds to the rename.
1090 */
1091 int renamed_stage = a_renames == renames1 ? 2 : 3;
1092 int other_stage = a_renames == renames1 ? 3 : 2;
9047ebbc 1093
41d70bd6 1094 remove_file(o, 1, ren1_src, o->call_depth || renamed_stage == 2);
9047ebbc 1095
41d70bd6
EN
1096 hashcpy(src_other.sha1, ren1->src_entry->stages[other_stage].sha);
1097 src_other.mode = ren1->src_entry->stages[other_stage].mode;
1098 hashcpy(dst_other.sha1, ren1->dst_entry->stages[other_stage].sha);
1099 dst_other.mode = ren1->dst_entry->stages[other_stage].mode;
9047ebbc
MV
1100 try_merge = 0;
1101
86273e57 1102 if (sha_eq(src_other.sha1, null_sha1)) {
f2507b4e 1103 if (dir_in_way(ren1_dst, 0 /*check_wc*/)) {
3b130adf
EN
1104 ren1->dst_entry->processed = 0;
1105 setup_rename_df_conflict_info(RENAME_DELETE,
1106 ren1->pair,
1107 NULL,
1108 branch1,
1109 branch2,
1110 ren1->dst_entry,
1111 NULL);
3b130adf
EN
1112 } else {
1113 clean_merge = 0;
1114 conflict_rename_delete(o, ren1->pair, branch1, branch2);
1115 }
d5af5105
SK
1116 } else if ((dst_other.mode == ren1->pair->two->mode) &&
1117 sha_eq(dst_other.sha1, ren1->pair->two->sha1)) {
1118 /* Added file on the other side
1119 identical to the file being
1120 renamed: clean merge */
1121 update_file(o, 1, ren1->pair->two->sha1, ren1->pair->two->mode, ren1_dst);
9047ebbc 1122 } else if (!sha_eq(dst_other.sha1, null_sha1)) {
9047ebbc
MV
1123 clean_merge = 0;
1124 try_merge = 1;
8a2fce18 1125 output(o, 1, "CONFLICT (rename/add): Rename %s->%s in %s. "
9047ebbc
MV
1126 "%s added in %s",
1127 ren1_src, ren1_dst, branch1,
1128 ren1_dst, branch2);
c94736a2
JH
1129 if (o->call_depth) {
1130 struct merge_file_info mfi;
1131 struct diff_filespec one, a, b;
1132
1133 one.path = a.path = b.path =
1134 (char *)ren1_dst;
1135 hashcpy(one.sha1, null_sha1);
1136 one.mode = 0;
1137 hashcpy(a.sha1, ren1->pair->two->sha1);
1138 a.mode = ren1->pair->two->mode;
1139 hashcpy(b.sha1, dst_other.sha1);
1140 b.mode = dst_other.mode;
1141 mfi = merge_file(o, &one, &a, &b,
1142 branch1,
1143 branch2);
1144 output(o, 1, "Adding merged %s", ren1_dst);
1145 update_file(o, 0,
1146 mfi.sha,
1147 mfi.mode,
1148 ren1_dst);
2a669c34 1149 try_merge = 0;
c94736a2 1150 } else {
3d6b8e88 1151 char *new_path = unique_path(o, ren1_dst, branch2);
c94736a2
JH
1152 output(o, 1, "Adding as %s instead", new_path);
1153 update_file(o, 0, dst_other.sha1, dst_other.mode, new_path);
3d6b8e88 1154 free(new_path);
c94736a2 1155 }
e8c8b713 1156 } else if ((item = string_list_lookup(renames2Dst, ren1_dst))) {
9047ebbc
MV
1157 ren2 = item->util;
1158 clean_merge = 0;
1159 ren2->processed = 1;
8a2fce18
MV
1160 output(o, 1, "CONFLICT (rename/rename): "
1161 "Rename %s->%s in %s. "
9047ebbc
MV
1162 "Rename %s->%s in %s",
1163 ren1_src, ren1_dst, branch1,
1164 ren2->pair->one->path, ren2->pair->two->path, branch2);
09c01f85 1165 conflict_rename_rename_2to1(o, ren1, branch1, ren2, branch2);
9047ebbc
MV
1166 } else
1167 try_merge = 1;
1168
1169 if (try_merge) {
8a2fce18 1170 struct diff_filespec *one, *a, *b;
9047ebbc
MV
1171 src_other.path = (char *)ren1_src;
1172
8a2fce18 1173 one = ren1->pair->one;
9047ebbc
MV
1174 if (a_renames == renames1) {
1175 a = ren1->pair->two;
1176 b = &src_other;
1177 } else {
1178 b = ren1->pair->two;
1179 a = &src_other;
1180 }
882fd11a 1181 update_stages_and_entry(ren1_dst, ren1->dst_entry, one, a, b, 1);
f2507b4e 1182 if (dir_in_way(ren1_dst, 0 /*check_wc*/)) {
882fd11a
EN
1183 setup_rename_df_conflict_info(RENAME_NORMAL,
1184 ren1->pair,
1185 NULL,
1186 branch1,
1187 NULL,
1188 ren1->dst_entry,
1189 NULL);
9047ebbc
MV
1190 }
1191 }
1192 }
1193 }
1194 string_list_clear(&a_by_dst, 0);
1195 string_list_clear(&b_by_dst, 0);
1196
1197 return clean_merge;
1198}
1199
1200static unsigned char *stage_sha(const unsigned char *sha, unsigned mode)
1201{
1202 return (is_null_sha1(sha) || mode == 0) ? NULL: (unsigned char *)sha;
1203}
1204
331a1838
EB
1205static int read_sha1_strbuf(const unsigned char *sha1, struct strbuf *dst)
1206{
1207 void *buf;
1208 enum object_type type;
1209 unsigned long size;
1210 buf = read_sha1_file(sha1, &type, &size);
1211 if (!buf)
1212 return error("cannot read object %s", sha1_to_hex(sha1));
1213 if (type != OBJ_BLOB) {
1214 free(buf);
1215 return error("object %s is not a blob", sha1_to_hex(sha1));
1216 }
1217 strbuf_attach(dst, buf, size, size + 1);
1218 return 0;
1219}
1220
1221static int blob_unchanged(const unsigned char *o_sha,
1222 const unsigned char *a_sha,
3e7589b7 1223 int renormalize, const char *path)
331a1838
EB
1224{
1225 struct strbuf o = STRBUF_INIT;
1226 struct strbuf a = STRBUF_INIT;
1227 int ret = 0; /* assume changed for safety */
1228
1229 if (sha_eq(o_sha, a_sha))
1230 return 1;
3e7589b7 1231 if (!renormalize)
331a1838
EB
1232 return 0;
1233
1234 assert(o_sha && a_sha);
1235 if (read_sha1_strbuf(o_sha, &o) || read_sha1_strbuf(a_sha, &a))
1236 goto error_return;
1237 /*
1238 * Note: binary | is used so that both renormalizations are
1239 * performed. Comparison can be skipped if both files are
1240 * unchanged since their sha1s have already been compared.
1241 */
1242 if (renormalize_buffer(path, o.buf, o.len, &o) |
1243 renormalize_buffer(path, a.buf, o.len, &a))
1244 ret = (o.len == a.len && !memcmp(o.buf, a.buf, o.len));
1245
1246error_return:
1247 strbuf_release(&o);
1248 strbuf_release(&a);
1249 return ret;
1250}
1251
5e3ce663
EN
1252static void handle_delete_modify(struct merge_options *o,
1253 const char *path,
84a08a47 1254 const char *new_path,
5e3ce663
EN
1255 unsigned char *a_sha, int a_mode,
1256 unsigned char *b_sha, int b_mode)
1257{
1258 if (!a_sha) {
1259 output(o, 1, "CONFLICT (delete/modify): %s deleted in %s "
84a08a47 1260 "and modified in %s. Version %s of %s left in tree%s%s.",
5e3ce663 1261 path, o->branch1,
84a08a47
EN
1262 o->branch2, o->branch2, path,
1263 path == new_path ? "" : " at ",
1264 path == new_path ? "" : new_path);
1265 update_file(o, 0, b_sha, b_mode, new_path);
5e3ce663
EN
1266 } else {
1267 output(o, 1, "CONFLICT (delete/modify): %s deleted in %s "
84a08a47 1268 "and modified in %s. Version %s of %s left in tree%s%s.",
5e3ce663 1269 path, o->branch2,
84a08a47
EN
1270 o->branch1, o->branch1, path,
1271 path == new_path ? "" : " at ",
1272 path == new_path ? "" : new_path);
1273 update_file(o, 0, a_sha, a_mode, new_path);
5e3ce663
EN
1274 }
1275}
1276
0c4918d1
EN
1277static int merge_content(struct merge_options *o,
1278 const char *path,
1279 unsigned char *o_sha, int o_mode,
1280 unsigned char *a_sha, int a_mode,
61b8bcae
EN
1281 unsigned char *b_sha, int b_mode,
1282 const char *df_rename_conflict_branch)
0c4918d1
EN
1283{
1284 const char *reason = "content";
1285 struct merge_file_info mfi;
1286 struct diff_filespec one, a, b;
4ab9a157 1287 unsigned df_conflict_remains = 0;
0c4918d1
EN
1288
1289 if (!o_sha) {
1290 reason = "add/add";
1291 o_sha = (unsigned char *)null_sha1;
1292 }
1293 one.path = a.path = b.path = (char *)path;
1294 hashcpy(one.sha1, o_sha);
1295 one.mode = o_mode;
1296 hashcpy(a.sha1, a_sha);
1297 a.mode = a_mode;
1298 hashcpy(b.sha1, b_sha);
1299 b.mode = b_mode;
1300
1301 mfi = merge_file(o, &one, &a, &b, o->branch1, o->branch2);
4ab9a157 1302 if (df_rename_conflict_branch &&
f2507b4e 1303 dir_in_way(path, !o->call_depth)) {
4ab9a157
EN
1304 df_conflict_remains = 1;
1305 }
1306
1307 if (mfi.clean && !df_conflict_remains &&
1308 sha_eq(mfi.sha, a_sha) && mfi.mode == a.mode)
0c4918d1
EN
1309 output(o, 3, "Skipped %s (merged same as existing)", path);
1310 else
1311 output(o, 2, "Auto-merging %s", path);
1312
1313 if (!mfi.clean) {
1314 if (S_ISGITLINK(mfi.mode))
1315 reason = "submodule";
1316 output(o, 1, "CONFLICT (%s): Merge conflict in %s",
1317 reason, path);
1318 }
1319
4ab9a157 1320 if (df_conflict_remains) {
3d6b8e88 1321 char *new_path;
4ab9a157
EN
1322 update_file_flags(o, mfi.sha, mfi.mode, path,
1323 o->call_depth || mfi.clean, 0);
1324 new_path = unique_path(o, path, df_rename_conflict_branch);
1325 mfi.clean = 0;
1326 output(o, 1, "Adding as %s instead", new_path);
1327 update_file_flags(o, mfi.sha, mfi.mode, new_path, 0, 1);
3d6b8e88 1328 free(new_path);
4ab9a157
EN
1329 } else {
1330 update_file(o, mfi.clean, mfi.sha, mfi.mode, path);
1331 }
0c4918d1
EN
1332 return mfi.clean;
1333
1334}
1335
9047ebbc 1336/* Per entry merge function */
8a2fce18
MV
1337static int process_entry(struct merge_options *o,
1338 const char *path, struct stage_data *entry)
9047ebbc
MV
1339{
1340 /*
1341 printf("processing entry, clean cache: %s\n", index_only ? "yes": "no");
1342 print_index_entry("\tpath: ", entry);
1343 */
1344 int clean_merge = 1;
1bc0ab7c 1345 int normalize = o->renormalize;
9047ebbc
MV
1346 unsigned o_mode = entry->stages[1].mode;
1347 unsigned a_mode = entry->stages[2].mode;
1348 unsigned b_mode = entry->stages[3].mode;
1349 unsigned char *o_sha = stage_sha(entry->stages[1].sha, o_mode);
1350 unsigned char *a_sha = stage_sha(entry->stages[2].sha, a_mode);
1351 unsigned char *b_sha = stage_sha(entry->stages[3].sha, b_mode);
1352
384c1668
EN
1353 if (entry->rename_df_conflict_info)
1354 return 1; /* Such cases are handled elsewhere. */
1355
37348937 1356 entry->processed = 1;
9047ebbc
MV
1357 if (o_sha && (!a_sha || !b_sha)) {
1358 /* Case A: Deleted in one */
1359 if ((!a_sha && !b_sha) ||
3e7589b7
JN
1360 (!b_sha && blob_unchanged(o_sha, a_sha, normalize, path)) ||
1361 (!a_sha && blob_unchanged(o_sha, b_sha, normalize, path))) {
9047ebbc
MV
1362 /* Deleted in both or deleted in one and
1363 * unchanged in the other */
1364 if (a_sha)
8a2fce18 1365 output(o, 2, "Removing %s", path);
9047ebbc 1366 /* do not touch working file if it did not exist */
b7fa51da 1367 remove_file(o, 1, path, !a_sha);
f2507b4e 1368 } else if (dir_in_way(path, 0 /*check_wc*/)) {
71f7ffcc 1369 entry->processed = 0;
4c0c1810 1370 return 1; /* Assume clean until processed */
9047ebbc
MV
1371 } else {
1372 /* Deleted in one and changed in the other */
1373 clean_merge = 0;
84a08a47 1374 handle_delete_modify(o, path, path,
5e3ce663 1375 a_sha, a_mode, b_sha, b_mode);
9047ebbc
MV
1376 }
1377
1378 } else if ((!o_sha && a_sha && !b_sha) ||
1379 (!o_sha && !a_sha && b_sha)) {
1380 /* Case B: Added in one. */
9047ebbc
MV
1381 unsigned mode;
1382 const unsigned char *sha;
9047ebbc
MV
1383
1384 if (a_sha) {
9047ebbc
MV
1385 mode = a_mode;
1386 sha = a_sha;
9047ebbc 1387 } else {
9047ebbc
MV
1388 mode = b_mode;
1389 sha = b_sha;
9047ebbc 1390 }
f2507b4e 1391 if (dir_in_way(path, 0 /*check_wc*/)) {
37348937
EN
1392 /* Handle D->F conflicts after all subfiles */
1393 entry->processed = 0;
4c0c1810 1394 return 1; /* Assume clean until processed */
9047ebbc 1395 } else {
8a2fce18 1396 output(o, 2, "Adding %s", path);
b7fa51da 1397 update_file(o, 1, sha, mode, path);
9047ebbc
MV
1398 }
1399 } else if (a_sha && b_sha) {
1400 /* Case C: Added in both (check for same permissions) and */
1401 /* case D: Modified in both, but differently. */
0c4918d1 1402 clean_merge = merge_content(o, path,
61b8bcae
EN
1403 o_sha, o_mode, a_sha, a_mode, b_sha, b_mode,
1404 NULL);
9047ebbc
MV
1405 } else if (!o_sha && !a_sha && !b_sha) {
1406 /*
1407 * this entry was deleted altogether. a_mode == 0 means
1408 * we had that path and want to actively remove it.
1409 */
b7fa51da 1410 remove_file(o, 1, path, !a_mode);
9047ebbc
MV
1411 } else
1412 die("Fatal merge failure, shouldn't happen.");
1413
1414 return clean_merge;
1415}
1416
37348937 1417/*
9c0bbb50
EN
1418 * Per entry merge function for D/F (and/or rename) conflicts. In the
1419 * cases we can cleanly resolve D/F conflicts, process_entry() can
1420 * clean out all the files below the directory for us. All D/F
1421 * conflict cases must be handled here at the end to make sure any
1422 * directories that can be cleaned out, are.
1423 *
1424 * Some rename conflicts may also be handled here that don't necessarily
1425 * involve D/F conflicts, since the code to handle them is generic enough
1426 * to handle those rename conflicts with or without D/F conflicts also
1427 * being involved.
37348937
EN
1428 */
1429static int process_df_entry(struct merge_options *o,
9c0bbb50 1430 const char *path, struct stage_data *entry)
37348937
EN
1431{
1432 int clean_merge = 1;
1433 unsigned o_mode = entry->stages[1].mode;
1434 unsigned a_mode = entry->stages[2].mode;
1435 unsigned b_mode = entry->stages[3].mode;
1436 unsigned char *o_sha = stage_sha(entry->stages[1].sha, o_mode);
1437 unsigned char *a_sha = stage_sha(entry->stages[2].sha, a_mode);
1438 unsigned char *b_sha = stage_sha(entry->stages[3].sha, b_mode);
37348937 1439
37348937 1440 entry->processed = 1;
9c0bbb50 1441 if (entry->rename_df_conflict_info) {
07413c5a
EN
1442 struct rename_df_conflict_info *conflict_info = entry->rename_df_conflict_info;
1443 char *src;
1444 switch (conflict_info->rename_type) {
882fd11a
EN
1445 case RENAME_NORMAL:
1446 clean_merge = merge_content(o, path,
1447 o_sha, o_mode, a_sha, a_mode, b_sha, b_mode,
1448 conflict_info->branch1);
1449 break;
3b130adf
EN
1450 case RENAME_DELETE:
1451 clean_merge = 0;
1452 conflict_rename_delete(o, conflict_info->pair1,
1453 conflict_info->branch1,
1454 conflict_info->branch2);
1455 break;
07413c5a
EN
1456 case RENAME_ONE_FILE_TO_TWO:
1457 src = conflict_info->pair1->one->path;
1458 clean_merge = 0;
1459 output(o, 1, "CONFLICT (rename/rename): "
1460 "Rename \"%s\"->\"%s\" in branch \"%s\" "
1461 "rename \"%s\"->\"%s\" in \"%s\"%s",
1462 src, conflict_info->pair1->two->path, conflict_info->branch1,
1463 src, conflict_info->pair2->two->path, conflict_info->branch2,
1464 o->call_depth ? " (left unresolved)" : "");
1465 if (o->call_depth) {
1466 remove_file_from_cache(src);
1467 update_file(o, 0, conflict_info->pair1->one->sha1,
1468 conflict_info->pair1->one->mode, src);
1469 }
1470 conflict_rename_rename_1to2(o, conflict_info->pair1,
1471 conflict_info->branch1,
1472 conflict_info->pair2,
1473 conflict_info->branch2);
1474 conflict_info->dst_entry2->processed = 1;
1475 break;
1476 default:
1477 entry->processed = 0;
1478 break;
1479 }
71f7ffcc
EN
1480 } else if (o_sha && (!a_sha || !b_sha)) {
1481 /* Modify/delete; deleted side may have put a directory in the way */
3d6b8e88 1482 char *renamed = NULL;
f2507b4e 1483 if (dir_in_way(path, !o->call_depth)) {
3d6b8e88
EN
1484 renamed = unique_path(o, path, a_sha ? o->branch1 : o->branch2);
1485 }
37348937 1486 clean_merge = 0;
3d6b8e88 1487 handle_delete_modify(o, path, renamed ? renamed : path,
71f7ffcc 1488 a_sha, a_mode, b_sha, b_mode);
3d6b8e88 1489 free(renamed);
9c0bbb50 1490 } else if (!o_sha && !!a_sha != !!b_sha) {
abafc88e 1491 /* directory -> (directory, file) or <nothing> -> (directory, file) */
9c0bbb50
EN
1492 const char *add_branch;
1493 const char *other_branch;
1494 unsigned mode;
1495 const unsigned char *sha;
1496 const char *conf;
37348937 1497
9c0bbb50
EN
1498 if (a_sha) {
1499 add_branch = o->branch1;
1500 other_branch = o->branch2;
1501 mode = a_mode;
1502 sha = a_sha;
1503 conf = "file/directory";
1504 } else {
1505 add_branch = o->branch2;
1506 other_branch = o->branch1;
1507 mode = b_mode;
1508 sha = b_sha;
1509 conf = "directory/file";
1510 }
f2507b4e 1511 if (dir_in_way(path, !o->call_depth)) {
3d6b8e88 1512 char *new_path = unique_path(o, path, add_branch);
9c0bbb50
EN
1513 clean_merge = 0;
1514 output(o, 1, "CONFLICT (%s): There is a directory with name %s in %s. "
1515 "Adding %s as %s",
1516 conf, path, other_branch, path, new_path);
9c0bbb50 1517 update_file(o, 0, sha, mode, new_path);
7b1c610f
EN
1518 if (o->call_depth)
1519 remove_file_from_cache(path);
3d6b8e88 1520 free(new_path);
9c0bbb50
EN
1521 } else {
1522 output(o, 2, "Adding %s", path);
1523 update_file(o, 1, sha, mode, path);
1524 }
37348937 1525 } else {
9c0bbb50
EN
1526 entry->processed = 0;
1527 return 1; /* not handled; assume clean until processed */
37348937
EN
1528 }
1529
1530 return clean_merge;
1531}
1532
8a2fce18
MV
1533int merge_trees(struct merge_options *o,
1534 struct tree *head,
9047ebbc
MV
1535 struct tree *merge,
1536 struct tree *common,
9047ebbc
MV
1537 struct tree **result)
1538{
1539 int code, clean;
1540
85e51b78
JH
1541 if (o->subtree_shift) {
1542 merge = shift_tree_object(head, merge, o->subtree_shift);
1543 common = shift_tree_object(head, common, o->subtree_shift);
9047ebbc
MV
1544 }
1545
1546 if (sha_eq(common->object.sha1, merge->object.sha1)) {
5e5ffa09 1547 output(o, 0, "Already up-to-date!");
9047ebbc
MV
1548 *result = head;
1549 return 1;
1550 }
1551
b7fa51da 1552 code = git_merge_trees(o->call_depth, common, head, merge);
9047ebbc 1553
fadd069d
JH
1554 if (code != 0) {
1555 if (show(o, 4) || o->call_depth)
1556 die("merging of trees %s and %s failed",
1557 sha1_to_hex(head->object.sha1),
1558 sha1_to_hex(merge->object.sha1));
1559 else
1560 exit(128);
1561 }
9047ebbc
MV
1562
1563 if (unmerged_cache()) {
1564 struct string_list *entries, *re_head, *re_merge;
1565 int i;
696ee23c
MV
1566 string_list_clear(&o->current_file_set, 1);
1567 string_list_clear(&o->current_directory_set, 1);
1568 get_files_dirs(o, head);
1569 get_files_dirs(o, merge);
9047ebbc
MV
1570
1571 entries = get_unmerged();
ef02b317 1572 make_room_for_directories_of_df_conflicts(o, entries);
8a2fce18
MV
1573 re_head = get_renames(o, head, common, head, merge, entries);
1574 re_merge = get_renames(o, merge, common, head, merge, entries);
1575 clean = process_renames(o, re_head, re_merge);
9047ebbc
MV
1576 for (i = 0; i < entries->nr; i++) {
1577 const char *path = entries->items[i].string;
1578 struct stage_data *e = entries->items[i].util;
1579 if (!e->processed
8a2fce18 1580 && !process_entry(o, path, e))
9047ebbc
MV
1581 clean = 0;
1582 }
37348937
EN
1583 for (i = 0; i < entries->nr; i++) {
1584 const char *path = entries->items[i].string;
1585 struct stage_data *e = entries->items[i].util;
1586 if (!e->processed
1587 && !process_df_entry(o, path, e))
1588 clean = 0;
1589 }
7edba4c4
JH
1590 for (i = 0; i < entries->nr; i++) {
1591 struct stage_data *e = entries->items[i].util;
1592 if (!e->processed)
1593 die("Unprocessed path??? %s",
1594 entries->items[i].string);
1595 }
9047ebbc
MV
1596
1597 string_list_clear(re_merge, 0);
1598 string_list_clear(re_head, 0);
1599 string_list_clear(entries, 1);
1600
1601 }
1602 else
1603 clean = 1;
1604
b7fa51da 1605 if (o->call_depth)
8a2fce18 1606 *result = write_tree_from_memory(o);
9047ebbc
MV
1607
1608 return clean;
1609}
1610
1611static struct commit_list *reverse_commit_list(struct commit_list *list)
1612{
1613 struct commit_list *next = NULL, *current, *backup;
1614 for (current = list; current; current = backup) {
1615 backup = current->next;
1616 current->next = next;
1617 next = current;
1618 }
1619 return next;
1620}
1621
1622/*
1623 * Merge the commits h1 and h2, return the resulting virtual
1624 * commit object and a flag indicating the cleanness of the merge.
1625 */
8a2fce18
MV
1626int merge_recursive(struct merge_options *o,
1627 struct commit *h1,
9047ebbc 1628 struct commit *h2,
9047ebbc
MV
1629 struct commit_list *ca,
1630 struct commit **result)
1631{
1632 struct commit_list *iter;
1633 struct commit *merged_common_ancestors;
1634 struct tree *mrtree = mrtree;
1635 int clean;
1636
8a2fce18
MV
1637 if (show(o, 4)) {
1638 output(o, 4, "Merging:");
5033639c
MV
1639 output_commit_title(o, h1);
1640 output_commit_title(o, h2);
9047ebbc
MV
1641 }
1642
1643 if (!ca) {
1644 ca = get_merge_bases(h1, h2, 1);
1645 ca = reverse_commit_list(ca);
1646 }
1647
8a2fce18
MV
1648 if (show(o, 5)) {
1649 output(o, 5, "found %u common ancestor(s):", commit_list_count(ca));
9047ebbc 1650 for (iter = ca; iter; iter = iter->next)
5033639c 1651 output_commit_title(o, iter->item);
9047ebbc
MV
1652 }
1653
1654 merged_common_ancestors = pop_commit(&ca);
1655 if (merged_common_ancestors == NULL) {
1656 /* if there is no common ancestor, make an empty tree */
1657 struct tree *tree = xcalloc(1, sizeof(struct tree));
1658
1659 tree->object.parsed = 1;
1660 tree->object.type = OBJ_TREE;
1661 pretend_sha1_file(NULL, 0, OBJ_TREE, tree->object.sha1);
1662 merged_common_ancestors = make_virtual_commit(tree, "ancestor");
1663 }
1664
1665 for (iter = ca; iter; iter = iter->next) {
8a2fce18 1666 const char *saved_b1, *saved_b2;
5033639c 1667 o->call_depth++;
9047ebbc
MV
1668 /*
1669 * When the merge fails, the result contains files
1670 * with conflict markers. The cleanness flag is
1671 * ignored, it was never actually used, as result of
1672 * merge_trees has always overwritten it: the committed
1673 * "conflicts" were already resolved.
1674 */
1675 discard_cache();
8a2fce18
MV
1676 saved_b1 = o->branch1;
1677 saved_b2 = o->branch2;
1678 o->branch1 = "Temporary merge branch 1";
1679 o->branch2 = "Temporary merge branch 2";
1680 merge_recursive(o, merged_common_ancestors, iter->item,
1681 NULL, &merged_common_ancestors);
1682 o->branch1 = saved_b1;
1683 o->branch2 = saved_b2;
5033639c 1684 o->call_depth--;
9047ebbc
MV
1685
1686 if (!merged_common_ancestors)
1687 die("merge returned no commit");
1688 }
1689
1690 discard_cache();
b7fa51da 1691 if (!o->call_depth)
9047ebbc 1692 read_cache();
9047ebbc 1693
7ca56aa0 1694 o->ancestor = "merged common ancestors";
8a2fce18
MV
1695 clean = merge_trees(o, h1->tree, h2->tree, merged_common_ancestors->tree,
1696 &mrtree);
9047ebbc 1697
b7fa51da 1698 if (o->call_depth) {
9047ebbc
MV
1699 *result = make_virtual_commit(mrtree, "merged tree");
1700 commit_list_insert(h1, &(*result)->parents);
1701 commit_list_insert(h2, &(*result)->parents->next);
1702 }
c7d84924 1703 flush_output(o);
f31027c9
JH
1704 if (show(o, 2))
1705 diff_warn_rename_limit("merge.renamelimit",
1706 o->needed_rename_limit, 0);
9047ebbc
MV
1707 return clean;
1708}
1709
73118f89
SB
1710static struct commit *get_ref(const unsigned char *sha1, const char *name)
1711{
1712 struct object *object;
1713
1714 object = deref_tag(parse_object(sha1), name, strlen(name));
1715 if (!object)
1716 return NULL;
1717 if (object->type == OBJ_TREE)
1718 return make_virtual_commit((struct tree*)object, name);
1719 if (object->type != OBJ_COMMIT)
1720 return NULL;
1721 if (parse_commit((struct commit *)object))
1722 return NULL;
1723 return (struct commit *)object;
1724}
1725
8a2fce18
MV
1726int merge_recursive_generic(struct merge_options *o,
1727 const unsigned char *head,
1728 const unsigned char *merge,
1729 int num_base_list,
1730 const unsigned char **base_list,
1731 struct commit **result)
73118f89
SB
1732{
1733 int clean, index_fd;
1734 struct lock_file *lock = xcalloc(1, sizeof(struct lock_file));
8a2fce18
MV
1735 struct commit *head_commit = get_ref(head, o->branch1);
1736 struct commit *next_commit = get_ref(merge, o->branch2);
73118f89
SB
1737 struct commit_list *ca = NULL;
1738
1739 if (base_list) {
1740 int i;
8a2fce18 1741 for (i = 0; i < num_base_list; ++i) {
73118f89 1742 struct commit *base;
8a2fce18 1743 if (!(base = get_ref(base_list[i], sha1_to_hex(base_list[i]))))
73118f89 1744 return error("Could not parse object '%s'",
8a2fce18 1745 sha1_to_hex(base_list[i]));
73118f89
SB
1746 commit_list_insert(base, &ca);
1747 }
1748 }
1749
1750 index_fd = hold_locked_index(lock, 1);
8a2fce18
MV
1751 clean = merge_recursive(o, head_commit, next_commit, ca,
1752 result);
73118f89
SB
1753 if (active_cache_changed &&
1754 (write_cache(index_fd, active_cache, active_nr) ||
1755 commit_locked_index(lock)))
1756 return error("Unable to write index.");
1757
1758 return clean ? 0 : 1;
1759}
1760
8a2fce18 1761static int merge_recursive_config(const char *var, const char *value, void *cb)
9047ebbc 1762{
8a2fce18 1763 struct merge_options *o = cb;
8c2be75f 1764 if (!strcmp(var, "merge.verbosity")) {
8a2fce18 1765 o->verbosity = git_config_int(var, value);
9047ebbc
MV
1766 return 0;
1767 }
8c2be75f 1768 if (!strcmp(var, "diff.renamelimit")) {
8a2fce18 1769 o->diff_rename_limit = git_config_int(var, value);
9047ebbc
MV
1770 return 0;
1771 }
8c2be75f 1772 if (!strcmp(var, "merge.renamelimit")) {
8a2fce18 1773 o->merge_rename_limit = git_config_int(var, value);
9047ebbc
MV
1774 return 0;
1775 }
e137a892 1776 return git_xmerge_config(var, value, cb);
9047ebbc
MV
1777}
1778
8a2fce18 1779void init_merge_options(struct merge_options *o)
9047ebbc 1780{
8a2fce18
MV
1781 memset(o, 0, sizeof(struct merge_options));
1782 o->verbosity = 2;
1783 o->buffer_output = 1;
1784 o->diff_rename_limit = -1;
1785 o->merge_rename_limit = -1;
7610fa57 1786 o->renormalize = 0;
8a2fce18 1787 git_config(merge_recursive_config, o);
9047ebbc 1788 if (getenv("GIT_MERGE_VERBOSITY"))
8a2fce18 1789 o->verbosity =
9047ebbc 1790 strtol(getenv("GIT_MERGE_VERBOSITY"), NULL, 10);
8a2fce18
MV
1791 if (o->verbosity >= 5)
1792 o->buffer_output = 0;
c7d84924 1793 strbuf_init(&o->obuf, 0);
696ee23c
MV
1794 memset(&o->current_file_set, 0, sizeof(struct string_list));
1795 o->current_file_set.strdup_strings = 1;
1796 memset(&o->current_directory_set, 0, sizeof(struct string_list));
1797 o->current_directory_set.strdup_strings = 1;
9047ebbc 1798}
635a7bb1
JN
1799
1800int parse_merge_opt(struct merge_options *o, const char *s)
1801{
1802 if (!s || !*s)
1803 return -1;
1804 if (!strcmp(s, "ours"))
1805 o->recursive_variant = MERGE_RECURSIVE_OURS;
1806 else if (!strcmp(s, "theirs"))
1807 o->recursive_variant = MERGE_RECURSIVE_THEIRS;
1808 else if (!strcmp(s, "subtree"))
1809 o->subtree_shift = "";
1810 else if (!prefixcmp(s, "subtree="))
1811 o->subtree_shift = s + strlen("subtree=");
58a1ece4
JF
1812 else if (!strcmp(s, "patience"))
1813 o->xdl_opts |= XDF_PATIENCE_DIFF;
4e5dd044
JF
1814 else if (!strcmp(s, "ignore-space-change"))
1815 o->xdl_opts |= XDF_IGNORE_WHITESPACE_CHANGE;
1816 else if (!strcmp(s, "ignore-all-space"))
1817 o->xdl_opts |= XDF_IGNORE_WHITESPACE;
1818 else if (!strcmp(s, "ignore-space-at-eol"))
1819 o->xdl_opts |= XDF_IGNORE_WHITESPACE_AT_EOL;
635a7bb1
JN
1820 else if (!strcmp(s, "renormalize"))
1821 o->renormalize = 1;
1822 else if (!strcmp(s, "no-renormalize"))
1823 o->renormalize = 0;
10ae7526
KB
1824 else if (!prefixcmp(s, "rename-threshold=")) {
1825 const char *score = s + strlen("rename-threshold=");
1826 if ((o->rename_score = parse_rename_score(&score)) == -1 || *score != 0)
1827 return -1;
1828 }
635a7bb1
JN
1829 else
1830 return -1;
1831 return 0;
1832}