1#include "cache.h"
2#include "tag.h"
3#include "commit.h"
4#include "pkt-line.h"
5#include "utf8.h"
6#include "diff.h"
7#include "revision.h"
8#include "notes.h"
9int save_commit_buffer = 1;
11const char *commit_type = "commit";
13static struct commit *check_commit(struct object *obj,
15 const unsigned char *sha1,
16 int quiet)
17{
18 if (obj->type != OBJ_COMMIT) {
19 if (!quiet)
20 error("Object %s is a %s, not a commit",
21 sha1_to_hex(sha1), typename(obj->type));
22 return NULL;
23 }
24 return (struct commit *) obj;
25}
26struct commit *lookup_commit_reference_gently(const unsigned char *sha1,
28 int quiet)
29{
30 struct object *obj = deref_tag(parse_object(sha1), NULL, 0);
31 if (!obj)
33 return NULL;
34 return check_commit(obj, sha1, quiet);
35}
36struct commit *lookup_commit_reference(const unsigned char *sha1)
38{
39 return lookup_commit_reference_gently(sha1, 0);
40}
41struct commit *lookup_commit_or_die(const unsigned char *sha1, const char *ref_name)
43{
44 struct commit *c = lookup_commit_reference(sha1);
45 if (!c)
46 die(_("could not parse %s"), ref_name);
47 if (hashcmp(sha1, c->object.sha1)) {
48 warning(_("%s %s is not a commit!"),
49 ref_name, sha1_to_hex(sha1));
50 }
51 return c;
52}
53struct commit *lookup_commit(const unsigned char *sha1)
55{
56 struct object *obj = lookup_object(sha1);
57 if (!obj)
58 return create_object(sha1, OBJ_COMMIT, alloc_commit_node());
59 if (!obj->type)
60 obj->type = OBJ_COMMIT;
61 return check_commit(obj, sha1, 0);
62}
63struct commit *lookup_commit_reference_by_name(const char *name)
65{
66 unsigned char sha1[20];
67 struct commit *commit;
68 if (get_sha1(name, sha1))
70 return NULL;
71 commit = lookup_commit_reference(sha1);
72 if (!commit || parse_commit(commit))
73 return NULL;
74 return commit;
75}
76static unsigned long parse_commit_date(const char *buf, const char *tail)
78{
79 const char *dateptr;
80 if (buf + 6 >= tail)
82 return 0;
83 if (memcmp(buf, "author", 6))
84 return 0;
85 while (buf < tail && *buf++ != '\n')
86 /* nada */;
87 if (buf + 9 >= tail)
88 return 0;
89 if (memcmp(buf, "committer", 9))
90 return 0;
91 while (buf < tail && *buf++ != '>')
92 /* nada */;
93 if (buf >= tail)
94 return 0;
95 dateptr = buf;
96 while (buf < tail && *buf++ != '\n')
97 /* nada */;
98 if (buf >= tail)
99 return 0;
100 /* dateptr < buf && buf[-1] == '\n', so strtoul will stop at buf-1 */
101 return strtoul(dateptr, NULL, 10);
102}
103static struct commit_graft **commit_graft;
105static int commit_graft_alloc, commit_graft_nr;
106static int commit_graft_pos(const unsigned char *sha1)
108{
109 int lo, hi;
110 lo = 0;
111 hi = commit_graft_nr;
112 while (lo < hi) {
113 int mi = (lo + hi) / 2;
114 struct commit_graft *graft = commit_graft[mi];
115 int cmp = hashcmp(sha1, graft->sha1);
116 if (!cmp)
117 return mi;
118 if (cmp < 0)
119 hi = mi;
120 else
121 lo = mi + 1;
122 }
123 return -lo - 1;
124}
125int register_commit_graft(struct commit_graft *graft, int ignore_dups)
127{
128 int pos = commit_graft_pos(graft->sha1);
129 if (0 <= pos) {
131 if (ignore_dups)
132 free(graft);
133 else {
134 free(commit_graft[pos]);
135 commit_graft[pos] = graft;
136 }
137 return 1;
138 }
139 pos = -pos - 1;
140 if (commit_graft_alloc <= ++commit_graft_nr) {
141 commit_graft_alloc = alloc_nr(commit_graft_alloc);
142 commit_graft = xrealloc(commit_graft,
143 sizeof(*commit_graft) *
144 commit_graft_alloc);
145 }
146 if (pos < commit_graft_nr)
147 memmove(commit_graft + pos + 1,
148 commit_graft + pos,
149 (commit_graft_nr - pos - 1) *
150 sizeof(*commit_graft));
151 commit_graft[pos] = graft;
152 return 0;
153}
154struct commit_graft *read_graft_line(char *buf, int len)
156{
157 /* The format is just "Commit Parent1 Parent2 ...\n" */
158 int i;
159 struct commit_graft *graft = NULL;
160 while (len && isspace(buf[len-1]))
162 buf[--len] = '\0';
163 if (buf[0] == '#' || buf[0] == '\0')
164 return NULL;
165 if ((len + 1) % 41)
166 goto bad_graft_data;
167 i = (len + 1) / 41 - 1;
168 graft = xmalloc(sizeof(*graft) + 20 * i);
169 graft->nr_parent = i;
170 if (get_sha1_hex(buf, graft->sha1))
171 goto bad_graft_data;
172 for (i = 40; i < len; i += 41) {
173 if (buf[i] != ' ')
174 goto bad_graft_data;
175 if (get_sha1_hex(buf + i + 1, graft->parent[i/41]))
176 goto bad_graft_data;
177 }
178 return graft;
179bad_graft_data:
181 error("bad graft data: %s", buf);
182 free(graft);
183 return NULL;
184}
185static int read_graft_file(const char *graft_file)
187{
188 FILE *fp = fopen(graft_file, "r");
189 char buf[1024];
190 if (!fp)
191 return -1;
192 while (fgets(buf, sizeof(buf), fp)) {
193 /* The format is just "Commit Parent1 Parent2 ...\n" */
194 int len = strlen(buf);
195 struct commit_graft *graft = read_graft_line(buf, len);
196 if (!graft)
197 continue;
198 if (register_commit_graft(graft, 1))
199 error("duplicate graft data: %s", buf);
200 }
201 fclose(fp);
202 return 0;
203}
204static void prepare_commit_graft(void)
206{
207 static int commit_graft_prepared;
208 char *graft_file;
209 if (commit_graft_prepared)
211 return;
212 graft_file = get_graft_file();
213 read_graft_file(graft_file);
214 /* make sure shallows are read */
215 is_repository_shallow();
216 commit_graft_prepared = 1;
217}
218struct commit_graft *lookup_commit_graft(const unsigned char *sha1)
220{
221 int pos;
222 prepare_commit_graft();
223 pos = commit_graft_pos(sha1);
224 if (pos < 0)
225 return NULL;
226 return commit_graft[pos];
227}
228int for_each_commit_graft(each_commit_graft_fn fn, void *cb_data)
230{
231 int i, ret;
232 for (i = ret = 0; i < commit_graft_nr && !ret; i++)
233 ret = fn(commit_graft[i], cb_data);
234 return ret;
235}
236int unregister_shallow(const unsigned char *sha1)
238{
239 int pos = commit_graft_pos(sha1);
240 if (pos < 0)
241 return -1;
242 if (pos + 1 < commit_graft_nr)
243 memmove(commit_graft + pos, commit_graft + pos + 1,
244 sizeof(struct commit_graft *)
245 * (commit_graft_nr - pos - 1));
246 commit_graft_nr--;
247 return 0;
248}
249int parse_commit_buffer(struct commit *item, const void *buffer, unsigned long size)
251{
252 const char *tail = buffer;
253 const char *bufptr = buffer;
254 unsigned char parent[20];
255 struct commit_list **pptr;
256 struct commit_graft *graft;
257 if (item->object.parsed)
259 return 0;
260 item->object.parsed = 1;
261 tail += size;
262 if (tail <= bufptr + 46 || memcmp(bufptr, "tree ", 5) || bufptr[45] != '\n')
263 return error("bogus commit object %s", sha1_to_hex(item->object.sha1));
264 if (get_sha1_hex(bufptr + 5, parent) < 0)
265 return error("bad tree pointer in commit %s",
266 sha1_to_hex(item->object.sha1));
267 item->tree = lookup_tree(parent);
268 bufptr += 46; /* "tree " + "hex sha1" + "\n" */
269 pptr = &item->parents;
270 graft = lookup_commit_graft(item->object.sha1);
272 while (bufptr + 48 < tail && !memcmp(bufptr, "parent ", 7)) {
273 struct commit *new_parent;
274 if (tail <= bufptr + 48 ||
276 get_sha1_hex(bufptr + 7, parent) ||
277 bufptr[47] != '\n')
278 return error("bad parents in commit %s", sha1_to_hex(item->object.sha1));
279 bufptr += 48;
280 /*
281 * The clone is shallow if nr_parent < 0, and we must
282 * not traverse its real parents even when we unhide them.
283 */
284 if (graft && (graft->nr_parent < 0 || grafts_replace_parents))
285 continue;
286 new_parent = lookup_commit(parent);
287 if (new_parent)
288 pptr = &commit_list_insert(new_parent, pptr)->next;
289 }
290 if (graft) {
291 int i;
292 struct commit *new_parent;
293 for (i = 0; i < graft->nr_parent; i++) {
294 new_parent = lookup_commit(graft->parent[i]);
295 if (!new_parent)
296 continue;
297 pptr = &commit_list_insert(new_parent, pptr)->next;
298 }
299 }
300 item->date = parse_commit_date(bufptr, tail);
301 return 0;
303}
304int parse_commit(struct commit *item)
306{
307 enum object_type type;
308 void *buffer;
309 unsigned long size;
310 int ret;
311 if (!item)
313 return -1;
314 if (item->object.parsed)
315 return 0;
316 buffer = read_sha1_file(item->object.sha1, &type, &size);
317 if (!buffer)
318 return error("Could not read %s",
319 sha1_to_hex(item->object.sha1));
320 if (type != OBJ_COMMIT) {
321 free(buffer);
322 return error("Object %s not a commit",
323 sha1_to_hex(item->object.sha1));
324 }
325 ret = parse_commit_buffer(item, buffer, size);
326 if (save_commit_buffer && !ret) {
327 item->buffer = buffer;
328 return 0;
329 }
330 free(buffer);
331 return ret;
332}
333int find_commit_subject(const char *commit_buffer, const char **subject)
335{
336 const char *eol;
337 const char *p = commit_buffer;
338 while (*p && (*p != '\n' || p[1] != '\n'))
340 p++;
341 if (*p) {
342 p += 2;
343 for (eol = p; *eol && *eol != '\n'; eol++)
344 ; /* do nothing */
345 } else
346 eol = p;
347 *subject = p;
349 return eol - p;
351}
352struct commit_list *commit_list_insert(struct commit *item, struct commit_list **list_p)
354{
355 struct commit_list *new_list = xmalloc(sizeof(struct commit_list));
356 new_list->item = item;
357 new_list->next = *list_p;
358 *list_p = new_list;
359 return new_list;
360}
361unsigned commit_list_count(const struct commit_list *l)
363{
364 unsigned c = 0;
365 for (; l; l = l->next )
366 c++;
367 return c;
368}
369void free_commit_list(struct commit_list *list)
371{
372 while (list) {
373 struct commit_list *temp = list;
374 list = temp->next;
375 free(temp);
376 }
377}
378struct commit_list * commit_list_insert_by_date(struct commit *item, struct commit_list **list)
380{
381 struct commit_list **pp = list;
382 struct commit_list *p;
383 while ((p = *pp) != NULL) {
384 if (p->item->date < item->date) {
385 break;
386 }
387 pp = &p->next;
388 }
389 return commit_list_insert(item, pp);
390}
391void commit_list_sort_by_date(struct commit_list **list)
394{
395 struct commit_list *ret = NULL;
396 while (*list) {
397 commit_list_insert_by_date((*list)->item, &ret);
398 *list = (*list)->next;
399 }
400 *list = ret;
401}
402struct commit *pop_most_recent_commit(struct commit_list **list,
404 unsigned int mark)
405{
406 struct commit *ret = (*list)->item;
407 struct commit_list *parents = ret->parents;
408 struct commit_list *old = *list;
409 *list = (*list)->next;
411 free(old);
412 while (parents) {
414 struct commit *commit = parents->item;
415 if (!parse_commit(commit) && !(commit->object.flags & mark)) {
416 commit->object.flags |= mark;
417 commit_list_insert_by_date(commit, list);
418 }
419 parents = parents->next;
420 }
421 return ret;
422}
423void clear_commit_marks(struct commit *commit, unsigned int mark)
425{
426 while (commit) {
427 struct commit_list *parents;
428 if (!(mark & commit->object.flags))
430 return;
431 commit->object.flags &= ~mark;
433 parents = commit->parents;
435 if (!parents)
436 return;
437 while ((parents = parents->next))
439 clear_commit_marks(parents->item, mark);
440 commit = commit->parents->item;
442 }
443}
444struct commit *pop_commit(struct commit_list **stack)
446{
447 struct commit_list *top = *stack;
448 struct commit *item = top ? top->item : NULL;
449 if (top) {
451 *stack = top->next;
452 free(top);
453 }
454 return item;
455}
456/*
458 * Performs an in-place topological sort on the list supplied.
459 */
460void sort_in_topological_order(struct commit_list ** list, int lifo)
461{
462 struct commit_list *next, *orig = *list;
463 struct commit_list *work, **insert;
464 struct commit_list **pptr;
465 if (!orig)
467 return;
468 *list = NULL;
469 /* Mark them and clear the indegree */
471 for (next = orig; next; next = next->next) {
472 struct commit *commit = next->item;
473 commit->indegree = 1;
474 }
475 /* update the indegree */
477 for (next = orig; next; next = next->next) {
478 struct commit_list * parents = next->item->parents;
479 while (parents) {
480 struct commit *parent = parents->item;
481 if (parent->indegree)
483 parent->indegree++;
484 parents = parents->next;
485 }
486 }
487 /*
489 * find the tips
490 *
491 * tips are nodes not reachable from any other node in the list
492 *
493 * the tips serve as a starting set for the work queue.
494 */
495 work = NULL;
496 insert = &work;
497 for (next = orig; next; next = next->next) {
498 struct commit *commit = next->item;
499 if (commit->indegree == 1)
501 insert = &commit_list_insert(commit, insert)->next;
502 }
503 /* process the list in topological order */
505 if (!lifo)
506 commit_list_sort_by_date(&work);
507 pptr = list;
509 *list = NULL;
510 while (work) {
511 struct commit *commit;
512 struct commit_list *parents, *work_item;
513 work_item = work;
515 work = work_item->next;
516 work_item->next = NULL;
517 commit = work_item->item;
519 for (parents = commit->parents; parents ; parents = parents->next) {
520 struct commit *parent = parents->item;
521 if (!parent->indegree)
523 continue;
524 /*
526 * parents are only enqueued for emission
527 * when all their children have been emitted thereby
528 * guaranteeing topological order.
529 */
530 if (--parent->indegree == 1) {
531 if (!lifo)
532 commit_list_insert_by_date(parent, &work);
533 else
534 commit_list_insert(parent, &work);
535 }
536 }
537 /*
538 * work_item is a commit all of whose children
539 * have already been emitted. we can emit it now.
540 */
541 commit->indegree = 0;
542 *pptr = work_item;
543 pptr = &work_item->next;
544 }
545}
546/* merge-base stuff */
548/* bits #0..15 in revision.h */
550#define PARENT1 (1u<<16)
551#define PARENT2 (1u<<17)
552#define STALE (1u<<18)
553#define RESULT (1u<<19)
554static const unsigned all_flags = (PARENT1 | PARENT2 | STALE | RESULT);
556static struct commit *interesting(struct commit_list *list)
558{
559 while (list) {
560 struct commit *commit = list->item;
561 list = list->next;
562 if (commit->object.flags & STALE)
563 continue;
564 return commit;
565 }
566 return NULL;
567}
568static struct commit_list *merge_bases_many(struct commit *one, int n, struct commit **twos)
570{
571 struct commit_list *list = NULL;
572 struct commit_list *result = NULL;
573 int i;
574 for (i = 0; i < n; i++) {
576 if (one == twos[i])
577 /*
578 * We do not mark this even with RESULT so we do not
579 * have to clean it up.
580 */
581 return commit_list_insert(one, &result);
582 }
583 if (parse_commit(one))
585 return NULL;
586 for (i = 0; i < n; i++) {
587 if (parse_commit(twos[i]))
588 return NULL;
589 }
590 one->object.flags |= PARENT1;
592 commit_list_insert_by_date(one, &list);
593 for (i = 0; i < n; i++) {
594 twos[i]->object.flags |= PARENT2;
595 commit_list_insert_by_date(twos[i], &list);
596 }
597 while (interesting(list)) {
599 struct commit *commit;
600 struct commit_list *parents;
601 struct commit_list *next;
602 int flags;
603 commit = list->item;
605 next = list->next;
606 free(list);
607 list = next;
608 flags = commit->object.flags & (PARENT1 | PARENT2 | STALE);
610 if (flags == (PARENT1 | PARENT2)) {
611 if (!(commit->object.flags & RESULT)) {
612 commit->object.flags |= RESULT;
613 commit_list_insert_by_date(commit, &result);
614 }
615 /* Mark parents of a found merge stale */
616 flags |= STALE;
617 }
618 parents = commit->parents;
619 while (parents) {
620 struct commit *p = parents->item;
621 parents = parents->next;
622 if ((p->object.flags & flags) == flags)
623 continue;
624 if (parse_commit(p))
625 return NULL;
626 p->object.flags |= flags;
627 commit_list_insert_by_date(p, &list);
628 }
629 }
630 /* Clean up the result to remove stale ones */
632 free_commit_list(list);
633 list = result; result = NULL;
634 while (list) {
635 struct commit_list *next = list->next;
636 if (!(list->item->object.flags & STALE))
637 commit_list_insert_by_date(list->item, &result);
638 free(list);
639 list = next;
640 }
641 return result;
642}
643struct commit_list *get_octopus_merge_bases(struct commit_list *in)
645{
646 struct commit_list *i, *j, *k, *ret = NULL;
647 struct commit_list **pptr = &ret;
648 for (i = in; i; i = i->next) {
650 if (!ret)
651 pptr = &commit_list_insert(i->item, pptr)->next;
652 else {
653 struct commit_list *new = NULL, *end = NULL;
654 for (j = ret; j; j = j->next) {
656 struct commit_list *bases;
657 bases = get_merge_bases(i->item, j->item, 1);
658 if (!new)
659 new = bases;
660 else
661 end->next = bases;
662 for (k = bases; k; k = k->next)
663 end = k;
664 }
665 ret = new;
666 }
667 }
668 return ret;
669}
670struct commit_list *get_merge_bases_many(struct commit *one,
672 int n,
673 struct commit **twos,
674 int cleanup)
675{
676 struct commit_list *list;
677 struct commit **rslt;
678 struct commit_list *result;
679 int cnt, i, j;
680 result = merge_bases_many(one, n, twos);
682 for (i = 0; i < n; i++) {
683 if (one == twos[i])
684 return result;
685 }
686 if (!result || !result->next) {
687 if (cleanup) {
688 clear_commit_marks(one, all_flags);
689 for (i = 0; i < n; i++)
690 clear_commit_marks(twos[i], all_flags);
691 }
692 return result;
693 }
694 /* There are more than one */
696 cnt = 0;
697 list = result;
698 while (list) {
699 list = list->next;
700 cnt++;
701 }
702 rslt = xcalloc(cnt, sizeof(*rslt));
703 for (list = result, i = 0; list; list = list->next)
704 rslt[i++] = list->item;
705 free_commit_list(result);
706 clear_commit_marks(one, all_flags);
708 for (i = 0; i < n; i++)
709 clear_commit_marks(twos[i], all_flags);
710 for (i = 0; i < cnt - 1; i++) {
711 for (j = i+1; j < cnt; j++) {
712 if (!rslt[i] || !rslt[j])
713 continue;
714 result = merge_bases_many(rslt[i], 1, &rslt[j]);
715 clear_commit_marks(rslt[i], all_flags);
716 clear_commit_marks(rslt[j], all_flags);
717 for (list = result; list; list = list->next) {
718 if (rslt[i] == list->item)
719 rslt[i] = NULL;
720 if (rslt[j] == list->item)
721 rslt[j] = NULL;
722 }
723 }
724 }
725 /* Surviving ones in rslt[] are the independent results */
727 result = NULL;
728 for (i = 0; i < cnt; i++) {
729 if (rslt[i])
730 commit_list_insert_by_date(rslt[i], &result);
731 }
732 free(rslt);
733 return result;
734}
735struct commit_list *get_merge_bases(struct commit *one, struct commit *two,
737 int cleanup)
738{
739 return get_merge_bases_many(one, 1, &two, cleanup);
740}
741int is_descendant_of(struct commit *commit, struct commit_list *with_commit)
743{
744 if (!with_commit)
745 return 1;
746 while (with_commit) {
747 struct commit *other;
748 other = with_commit->item;
750 with_commit = with_commit->next;
751 if (in_merge_bases(other, &commit, 1))
752 return 1;
753 }
754 return 0;
755}
756int in_merge_bases(struct commit *commit, struct commit **reference, int num)
758{
759 struct commit_list *bases, *b;
760 int ret = 0;
761 if (num == 1)
763 bases = get_merge_bases(commit, *reference, 1);
764 else
765 die("not yet");
766 for (b = bases; b; b = b->next) {
767 if (!hashcmp(commit->object.sha1, b->item->object.sha1)) {
768 ret = 1;
769 break;
770 }
771 }
772 free_commit_list(bases);
774 return ret;
775}
776struct commit_list *reduce_heads(struct commit_list *heads)
778{
779 struct commit_list *p;
780 struct commit_list *result = NULL, **tail = &result;
781 struct commit **other;
782 size_t num_head, num_other;
783 if (!heads)
785 return NULL;
786 /* Avoid unnecessary reallocations */
788 for (p = heads, num_head = 0; p; p = p->next)
789 num_head++;
790 other = xcalloc(sizeof(*other), num_head);
791 /* For each commit, see if it can be reached by others */
793 for (p = heads; p; p = p->next) {
794 struct commit_list *q, *base;
795 /* Do we already have this in the result? */
797 for (q = result; q; q = q->next)
798 if (p->item == q->item)
799 break;
800 if (q)
801 continue;
802 num_other = 0;
804 for (q = heads; q; q = q->next) {
805 if (p->item == q->item)
806 continue;
807 other[num_other++] = q->item;
808 }
809 if (num_other)
810 base = get_merge_bases_many(p->item, num_other, other, 1);
811 else
812 base = NULL;
813 /*
814 * If p->item does not have anything common with other
815 * commits, there won't be any merge base. If it is
816 * reachable from some of the others, p->item will be
817 * the merge base. If its history is connected with
818 * others, but p->item is not reachable by others, we
819 * will get something other than p->item back.
820 */
821 if (!base || (base->item != p->item))
822 tail = &(commit_list_insert(p->item, tail)->next);
823 free_commit_list(base);
824 }
825 free(other);
826 return result;
827}
828static const char commit_utf8_warn[] =
830"Warning: commit message does not conform to UTF-8.\n"
831"You may want to amend it after fixing the message, or set the config\n"
832"variable i18n.commitencoding to the encoding your project uses.\n";
833int commit_tree(const char *msg, unsigned char *tree,
835 struct commit_list *parents, unsigned char *ret,
836 const char *author)
837{
838 int result;
839 int encoding_is_utf8;
840 struct strbuf buffer;
841 assert_sha1_type(tree, OBJ_TREE);
843 /* Not having i18n.commitencoding is the same as having utf-8 */
845 encoding_is_utf8 = is_encoding_utf8(git_commit_encoding);
846 strbuf_init(&buffer, 8192); /* should avoid reallocs for the headers */
848 strbuf_addf(&buffer, "tree %s\n", sha1_to_hex(tree));
849 /*
851 * NOTE! This ordering means that the same exact tree merged with a
852 * different order of parents will be a _different_ changeset even
853 * if everything else stays the same.
854 */
855 while (parents) {
856 struct commit_list *next = parents->next;
857 strbuf_addf(&buffer, "parent %s\n",
858 sha1_to_hex(parents->item->object.sha1));
859 free(parents);
860 parents = next;
861 }
862 /* Person/date information */
864 if (!author)
865 author = git_author_info(IDENT_ERROR_ON_NO_NAME);
866 strbuf_addf(&buffer, "author %s\n", author);
867 strbuf_addf(&buffer, "committer %s\n", git_committer_info(IDENT_ERROR_ON_NO_NAME));
868 if (!encoding_is_utf8)
869 strbuf_addf(&buffer, "encoding %s\n", git_commit_encoding);
870 strbuf_addch(&buffer, '\n');
871 /* And add the comment */
873 strbuf_addstr(&buffer, msg);
874 /* And check the encoding */
876 if (encoding_is_utf8 && !is_utf8(buffer.buf))
877 fprintf(stderr, commit_utf8_warn);
878 result = write_sha1_file(buffer.buf, buffer.len, commit_type, ret);
880 strbuf_release(&buffer);
881 return result;
882}