1 /*
2  * Copyright (c) 2020-2022 Tracey Emery <tracey@traceyemery.net>
3  * Copyright (c) 2018, 2019 Stefan Sperling <stsp@openbsd.org>
4  *
5  * Permission to use, copy, modify, and distribute this software for any
6  * purpose with or without fee is hereby granted, provided that the above
7  * copyright notice and this permission notice appear in all copies.
8  *
9  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16  */
17 
18 #include <sys/queue.h>
19 #include <sys/socket.h>
20 #include <sys/stat.h>
21 
22 #include <event.h>
23 #include <imsg.h>
24 #include <sha1.h>
25 #include <stdlib.h>
26 #include <stdio.h>
27 #include <string.h>
28 #include <unistd.h>
29 
30 #include "got_error.h"
31 #include "got_object.h"
32 #include "got_reference.h"
33 #include "got_repository.h"
34 #include "got_path.h"
35 #include "got_cancel.h"
36 #include "got_diff.h"
37 #include "got_commit_graph.h"
38 #include "got_blame.h"
39 #include "got_privsep.h"
40 
41 #include "proc.h"
42 #include "gotwebd.h"
43 
44 static const struct got_error *got_init_repo_commit(struct repo_commit **);
45 static const struct got_error *got_init_repo_tag(struct repo_tag **);
46 static const struct got_error *got_get_repo_commit(struct request *,
47     struct repo_commit *, struct got_commit_object *, struct got_reflist_head *,
48     struct got_object_id *);
49 static const struct got_error *got_gotweb_dupfd(int *, int *);
50 static const struct got_error *got_gotweb_openfile(FILE **, int *, int *);
51 static const struct got_error *got_gotweb_flushfile(FILE *, int);
52 static const struct got_error *got_gotweb_blame_cb(void *, int, int,
53     struct got_commit_object *,struct got_object_id *);
54 
55 static int
56 isbinary(const uint8_t *buf, size_t n)
57 {
58 	return memchr(buf, '\0', n) != NULL;
59 }
60 
61 
62 static const struct got_error *
63 got_gotweb_flushfile(FILE *f, int fd)
64 {
65 	if (fseek(f, 0, SEEK_SET) == -1)
66 		return got_error_from_errno("fseek");
67 
68 	if (ftruncate(fd, 0) == -1)
69 		return got_error_from_errno("ftruncate");
70 
71 	if (fsync(fd) == -1)
72 		return got_error_from_errno("fsync");
73 
74 	if (f && fclose(f) == EOF)
75 		return got_error_from_errno("fclose");
76 
77 	if (fd != -1 && close(fd) != -1)
78 		return got_error_from_errno("close");
79 
80 	return NULL;
81 }
82 
83 static const struct got_error *
84 got_gotweb_openfile(FILE **f, int *priv_fd, int *fd)
85 {
86 	*fd = dup(*priv_fd);
87 	if (*fd == -1)
88 		return got_error_from_errno("dup");
89 
90 	*f = fdopen(*fd, "w+");
91 	if (*f == NULL) {
92 		close(*fd);
93 		return got_error(GOT_ERR_PRIVSEP_NO_FD);
94 	}
95 
96 	return NULL;
97 }
98 
99 static const struct got_error *
100 got_gotweb_dupfd(int *priv_fd, int *fd)
101 {
102 	*fd = dup(*priv_fd);
103 
104 	if (*fd < 0)
105 		return NULL;
106 
107 	return NULL;
108 }
109 
110 const struct got_error *
111 got_get_repo_owner(char **owner, struct request *c, char *dir)
112 {
113 	struct server *srv = c->srv;
114 	struct transport *t = c->t;
115 	struct got_repository *repo = t->repo;
116 	const char *gitconfig_owner;
117 
118 	*owner = NULL;
119 
120 	if (srv->show_repo_owner == 0)
121 		return NULL;
122 
123 	gitconfig_owner = got_repo_get_gitconfig_owner(repo);
124 	if (gitconfig_owner) {
125 		*owner = strdup(gitconfig_owner);
126 		if (*owner == NULL)
127 			return got_error_from_errno("strdup");
128 	} else {
129 		*owner = strdup("");
130 		if (*owner == NULL)
131 			return got_error_from_errno("strdup");
132 	}
133 	return NULL;
134 }
135 
136 const struct got_error *
137 got_get_repo_age(char **repo_age, struct request *c, char *dir,
138     const char *refname, int ref_tm)
139 {
140 	const struct got_error *error = NULL;
141 	struct server *srv = c->srv;
142 	struct transport *t = c->t;
143 	struct got_repository *repo = t->repo;
144 	struct got_commit_object *commit = NULL;
145 	struct got_reflist_head refs;
146 	struct got_reflist_entry *re;
147 	time_t committer_time = 0, cmp_time = 0;
148 
149 	*repo_age = NULL;
150 	TAILQ_INIT(&refs);
151 
152 	if (srv->show_repo_age == 0)
153 		return NULL;
154 
155 	error = got_ref_list(&refs, repo, "refs/heads",
156 	    got_ref_cmp_by_name, NULL);
157 	if (error)
158 		goto done;
159 
160 	/*
161 	 * Find the youngest branch tip in the repository, or the age of
162 	 * the a specific branch tip if a name was provided by the caller.
163 	 */
164 	TAILQ_FOREACH(re, &refs, entry) {
165 		struct got_object_id *id = NULL;
166 
167 		if (refname && strcmp(got_ref_get_name(re->ref), refname) != 0)
168 			continue;
169 
170 		error = got_ref_resolve(&id, repo, re->ref);
171 		if (error)
172 			goto done;
173 
174 		error = got_object_open_as_commit(&commit, repo, id);
175 		free(id);
176 		if (error)
177 			goto done;
178 
179 		committer_time =
180 		    got_object_commit_get_committer_time(commit);
181 		got_object_commit_close(commit);
182 		if (cmp_time < committer_time)
183 			cmp_time = committer_time;
184 
185 		if (refname)
186 			break;
187 	}
188 
189 	if (cmp_time != 0) {
190 		committer_time = cmp_time;
191 		error = gotweb_get_time_str(repo_age, committer_time, ref_tm);
192 	}
193 done:
194 	got_ref_list_free(&refs);
195 	return error;
196 }
197 
198 static const struct got_error *
199 got_get_repo_commit(struct request *c, struct repo_commit *repo_commit,
200     struct got_commit_object *commit, struct got_reflist_head *refs,
201     struct got_object_id *id)
202 {
203 	const struct got_error *error = NULL;
204 	struct got_reflist_entry *re;
205 	struct got_object_id *id2 = NULL;
206 	struct got_object_qid *parent_id;
207 	struct transport *t = c->t;
208 	struct querystring *qs = c->t->qs;
209 	char *commit_msg = NULL, *commit_msg0;
210 
211 	TAILQ_FOREACH(re, refs, entry) {
212 		char *s;
213 		const char *name;
214 		struct got_tag_object *tag = NULL;
215 		struct got_object_id *ref_id;
216 		int cmp;
217 
218 		if (got_ref_is_symbolic(re->ref))
219 			continue;
220 
221 		name = got_ref_get_name(re->ref);
222 		if (strncmp(name, "refs/", 5) == 0)
223 			name += 5;
224 		if (strncmp(name, "got/", 4) == 0)
225 			continue;
226 		if (strncmp(name, "heads/", 6) == 0)
227 			name += 6;
228 		if (strncmp(name, "remotes/", 8) == 0) {
229 			name += 8;
230 			if (strstr(name, "/" GOT_REF_HEAD) != NULL)
231 				continue;
232 		}
233 		error = got_ref_resolve(&ref_id, t->repo, re->ref);
234 		if (error)
235 			return error;
236 		if (strncmp(name, "tags/", 5) == 0) {
237 			error = got_object_open_as_tag(&tag, t->repo, ref_id);
238 			if (error) {
239 				if (error->code != GOT_ERR_OBJ_TYPE) {
240 					free(ref_id);
241 					continue;
242 				}
243 				/*
244 				 * Ref points at something other
245 				 * than a tag.
246 				 */
247 				error = NULL;
248 				tag = NULL;
249 			}
250 		}
251 		cmp = got_object_id_cmp(tag ?
252 		    got_object_tag_get_object_id(tag) : ref_id, id);
253 		free(ref_id);
254 		if (tag)
255 			got_object_tag_close(tag);
256 		if (cmp != 0)
257 			continue;
258 		s = repo_commit->refs_str;
259 		if (asprintf(&repo_commit->refs_str, "%s%s%s", s ? s : "",
260 		    s ? ", " : "", name) == -1) {
261 			error = got_error_from_errno("asprintf");
262 			free(s);
263 			repo_commit->refs_str = NULL;
264 			return error;
265 		}
266 		free(s);
267 	}
268 
269 	error = got_object_id_str(&repo_commit->commit_id, id);
270 	if (error)
271 		return error;
272 
273 	error = got_object_id_str(&repo_commit->tree_id,
274 	    got_object_commit_get_tree_id(commit));
275 	if (error)
276 		return error;
277 
278 	if (qs->action == DIFF) {
279 		parent_id = STAILQ_FIRST(
280 		    got_object_commit_get_parent_ids(commit));
281 		if (parent_id != NULL) {
282 			id2 = got_object_id_dup(&parent_id->id);
283 			error = got_object_id_str(&repo_commit->parent_id, id2);
284 			if (error)
285 				return error;
286 			free(id2);
287 		} else {
288 			repo_commit->parent_id = strdup("/dev/null");
289 			if (repo_commit->parent_id == NULL) {
290 				error = got_error_from_errno("strdup");
291 				return error;
292 			}
293 		}
294 	}
295 
296 	repo_commit->committer_time =
297 	    got_object_commit_get_committer_time(commit);
298 
299 	repo_commit->author =
300 	    strdup(got_object_commit_get_author(commit));
301 	if (repo_commit->author == NULL) {
302 		error = got_error_from_errno("strdup");
303 		return error;
304 	}
305 	repo_commit->committer =
306 	    strdup(got_object_commit_get_committer(commit));
307 	if (repo_commit->committer == NULL) {
308 		error = got_error_from_errno("strdup");
309 		return error;
310 	}
311 	error = got_object_commit_get_logmsg(&commit_msg0, commit);
312 	if (error)
313 		return error;
314 
315 	commit_msg = commit_msg0;
316 	while (*commit_msg == '\n')
317 		commit_msg++;
318 
319 	repo_commit->commit_msg = strdup(commit_msg);
320 	if (repo_commit->commit_msg == NULL)
321 		error = got_error_from_errno("strdup");
322 	free(commit_msg0);
323 	return error;
324 }
325 
326 const struct got_error *
327 got_get_repo_commits(struct request *c, int limit)
328 {
329 	const struct got_error *error = NULL;
330 	struct got_object_id *id = NULL;
331 	struct got_commit_graph *graph = NULL;
332 	struct got_commit_object *commit = NULL;
333 	struct got_reflist_head refs;
334 	struct got_reference *ref = NULL;
335 	struct repo_commit *repo_commit = NULL;
336 	struct server *srv = c->srv;
337 	struct transport *t = c->t;
338 	struct got_repository *repo = t->repo;
339 	struct querystring *qs = t->qs;
340 	struct repo_dir *repo_dir = t->repo_dir;
341 	char *in_repo_path = NULL, *repo_path = NULL, *file_path = NULL;
342 	int chk_next = 0, chk_multi = 0, commit_found = 0;
343 	int obj_type, limit_chk = 0;
344 
345 	TAILQ_INIT(&refs);
346 
347 	if (qs->file != NULL && strlen(qs->file) > 0)
348 		if (asprintf(&file_path, "%s/%s", qs->folder ? qs->folder : "",
349 		    qs->file) == -1)
350 			return got_error_from_errno("asprintf");
351 
352 	if (asprintf(&repo_path, "%s/%s", srv->repos_path,
353 	    repo_dir->name) == -1) {
354 		error = got_error_from_errno("asprintf");
355 		goto done;
356 	}
357 
358 	/*
359 	 * XXX: jumping directly to a commit id via
360 	 * got_repo_match_object_id_prefix significantly improves performance,
361 	 * but does not allow us to create a PREVIOUS button, since commits can
362 	 * only be itereated forward. So, we have to match as we iterate from
363 	 * the headref.
364 	 */
365 	if (qs->action == BRIEFS || qs->action == COMMITS ||
366 	    (qs->action == TREE && qs->commit == NULL)) {
367 		error = got_ref_open(&ref, repo, qs->headref, 0);
368 		if (error)
369 			goto done;
370 
371 		error = got_ref_resolve(&id, repo, ref);
372 		if (error)
373 			goto done;
374 	} else if (qs->commit != NULL) {
375 		error = got_ref_open(&ref, repo, qs->commit, 0);
376 		if (error == NULL) {
377 			error = got_ref_resolve(&id, repo, ref);
378 			if (error)
379 				goto done;
380 			error = got_object_get_type(&obj_type, repo, id);
381 			if (error)
382 				goto done;
383 			if (obj_type == GOT_OBJ_TYPE_TAG) {
384 				struct got_tag_object *tag;
385 				error = got_object_open_as_tag(&tag, repo, id);
386 				if (error)
387 					goto done;
388 				if (got_object_tag_get_object_type(tag) !=
389 				    GOT_OBJ_TYPE_COMMIT) {
390 					got_object_tag_close(tag);
391 					error = got_error(GOT_ERR_OBJ_TYPE);
392 					goto done;
393 				}
394 				free(id);
395 				id = got_object_id_dup(
396 				    got_object_tag_get_object_id(tag));
397 				if (id == NULL)
398 					error = got_error_from_errno(
399 					    "got_object_id_dup");
400 				got_object_tag_close(tag);
401 				if (error)
402 					goto done;
403 			} else if (obj_type != GOT_OBJ_TYPE_COMMIT) {
404 				error = got_error(GOT_ERR_OBJ_TYPE);
405 				goto done;
406 			}
407 		}
408 		error = got_repo_match_object_id_prefix(&id, qs->commit,
409 		    GOT_OBJ_TYPE_COMMIT, repo);
410 		if (error)
411 			goto done;
412 	}
413 
414 	error = got_repo_map_path(&in_repo_path, repo, repo_path);
415 	if (error)
416 		goto done;
417 
418 	error = got_ref_list(&refs, repo, NULL, got_ref_cmp_by_name, NULL);
419 	if (error)
420 		goto done;
421 
422 	if (qs->file != NULL && strlen(qs->file) > 0) {
423 		error = got_commit_graph_open(&graph, file_path, 0);
424 		if (error)
425 			goto done;
426 	} else {
427 		error = got_commit_graph_open(&graph, in_repo_path, 0);
428 		if (error)
429 			goto done;
430 	}
431 
432 	error = got_commit_graph_iter_start(graph, id, repo, NULL, NULL);
433 	if (error)
434 		goto done;
435 
436 	for (;;) {
437 		if (limit_chk == ((limit * qs->page) - (limit - 1)) &&
438 		    commit_found == 0 && repo_commit &&
439 		    repo_commit->commit_id != NULL) {
440 			t->prev_id = strdup(repo_commit->commit_id);
441 			if (t->prev_id == NULL) {
442 				error = got_error_from_errno("strdup");
443 				goto done;
444 			}
445 		}
446 
447 		error = got_commit_graph_iter_next(&id, graph, repo, NULL,
448 		    NULL);
449 		if (error) {
450 			if (error->code == GOT_ERR_ITER_COMPLETED)
451 				error = NULL;
452 			goto done;
453 		}
454 		if (id == NULL)
455 			goto done;
456 
457 		error = got_object_open_as_commit(&commit, repo, id);
458 		if (error)
459 			goto done;
460 
461 		error = got_ref_list(&refs, repo, NULL, got_ref_cmp_by_name,
462 		    NULL);
463 		if (error)
464 			goto done;
465 
466 		error = got_init_repo_commit(&repo_commit);
467 		if (error)
468 			goto done;
469 
470 		TAILQ_INSERT_TAIL(&t->repo_commits, repo_commit, entry);
471 
472 		error = got_get_repo_commit(c, repo_commit, commit,
473 		    &refs, id);
474 		if (error)
475 			goto done;
476 
477 		if (qs->commit != NULL && commit_found == 0 && limit != 1) {
478 			if (strcmp(qs->commit, repo_commit->commit_id) == 0)
479 				commit_found = 1;
480 			else if (qs->file != NULL && strlen(qs->file) > 0 &&
481 			    qs->page == 0)
482 				commit_found = 1;
483 			else {
484 				limit_chk++;
485 				free(id);
486 				id = NULL;
487 				continue;
488 			}
489 		}
490 
491 		free(id);
492 		id = NULL;
493 
494 		if (limit == 1 && chk_multi == 0 &&
495 		    srv->max_commits_display != 1)
496 			commit_found = 1;
497 		else {
498 			chk_multi = 1;
499 
500 			/*
501 			 * check for one more commit before breaking,
502 			 * so we know whether to navigate through briefs
503 			 * commits and summary
504 			 */
505 			if (chk_next && (qs->action == BRIEFS ||
506 			    qs->action == COMMITS || qs->action == SUMMARY)) {
507 				t->next_id = strdup(repo_commit->commit_id);
508 				if (t->next_id == NULL) {
509 					error = got_error_from_errno("strdup");
510 					goto done;
511 				}
512 				if (commit) {
513 					got_object_commit_close(commit);
514 					commit = NULL;
515 				}
516 				TAILQ_REMOVE(&t->repo_commits, repo_commit,
517 				    entry);
518 				gotweb_free_repo_commit(repo_commit);
519 				goto done;
520 			}
521 		}
522 		got_ref_list_free(&refs);
523 		if (error || (limit && --limit == 0)) {
524 			if (commit_found || (qs->file != NULL &&
525 			    strlen(qs->file) > 0))
526 				if (chk_multi == 0)
527 					break;
528 			chk_next = 1;
529 		}
530 		if (commit) {
531 			got_object_commit_close(commit);
532 			commit = NULL;
533 		}
534 	}
535 done:
536 	if (ref)
537 		got_ref_close(ref);
538 	if (commit)
539 		got_object_commit_close(commit);
540 	if (graph)
541 		got_commit_graph_close(graph);
542 	got_ref_list_free(&refs);
543 	free(in_repo_path);
544 	free(file_path);
545 	free(repo_path);
546 	free(id);
547 	return error;
548 }
549 
550 const struct got_error *
551 got_get_repo_tags(struct request *c, int limit)
552 {
553 	const struct got_error *error = NULL;
554 	struct got_object_id *id = NULL;
555 	struct got_commit_object *commit = NULL;
556 	struct got_reflist_head refs;
557 	struct got_reference *ref;
558 	struct got_reflist_entry *re;
559 	struct server *srv = c->srv;
560 	struct transport *t = c->t;
561 	struct got_repository *repo = t->repo;
562 	struct querystring *qs = t->qs;
563 	struct repo_dir *repo_dir = t->repo_dir;
564 	struct got_tag_object *tag = NULL;
565 	struct repo_tag *rt = NULL, *trt = NULL;
566 	char *in_repo_path = NULL, *repo_path = NULL, *id_str = NULL;
567 	char *tag_commit = NULL, *tag_commit0 = NULL;
568 	char *commit_msg = NULL, *commit_msg0 = NULL;
569 	int chk_next = 0, chk_multi = 1, commit_found = 0, c_cnt = 0;
570 
571 	TAILQ_INIT(&refs);
572 
573 	if (asprintf(&repo_path, "%s/%s", srv->repos_path,
574 	    repo_dir->name) == -1)
575 		return got_error_from_errno("asprintf");
576 
577 	if (qs->commit == NULL && qs->action == TAGS) {
578 		error = got_ref_open(&ref, repo, qs->headref, 0);
579 		if (error)
580 			goto err;
581 		error = got_ref_resolve(&id, repo, ref);
582 		got_ref_close(ref);
583 		if (error)
584 			goto err;
585 	} else if (qs->commit == NULL && qs->action == TAG) {
586 		error = got_error_msg(GOT_ERR_EOF, "commit id missing");
587 		goto err;
588 	} else {
589 		error = got_repo_match_object_id_prefix(&id, qs->commit,
590 		    GOT_OBJ_TYPE_COMMIT, repo);
591 		if (error)
592 			goto err;
593 	}
594 
595 	if (qs->action != SUMMARY && qs->action != TAGS) {
596 		error = got_object_open_as_commit(&commit, repo, id);
597 		if (error)
598 			goto err;
599 		error = got_object_commit_get_logmsg(&commit_msg0, commit);
600 		if (error)
601 			goto err;
602 		if (commit) {
603 			got_object_commit_close(commit);
604 			commit = NULL;
605 		}
606 	}
607 
608 	error = got_repo_map_path(&in_repo_path, repo, repo_path);
609 	if (error)
610 		goto err;
611 
612 	error = got_ref_list(&refs, repo, "refs/tags", got_ref_cmp_tags,
613 	   repo);
614 	if (error)
615 		goto err;
616 
617 	if (limit == 1)
618 		chk_multi = 0;
619 
620 	/*
621 	 * XXX: again, see previous message about caching
622 	 */
623 
624 	TAILQ_FOREACH(re, &refs, entry) {
625 		struct repo_tag *new_repo_tag = NULL;
626 		error = got_init_repo_tag(&new_repo_tag);
627 		if (error)
628 			goto err;
629 
630 		TAILQ_INSERT_TAIL(&t->repo_tags, new_repo_tag, entry);
631 
632 		new_repo_tag->tag_name = strdup(got_ref_get_name(re->ref));
633 		if (new_repo_tag->tag_name == NULL) {
634 			error = got_error_from_errno("strdup");
635 			goto err;
636 		}
637 
638 		free(id);
639 		id = NULL;
640 
641 		free(id_str);
642 		id_str = NULL;
643 
644 		error = got_ref_resolve(&id, repo, re->ref);
645 		if (error)
646 			goto done;
647 
648 		if (tag)
649 			got_object_tag_close(tag);
650 		error = got_object_open_as_tag(&tag, repo, id);
651 		if (error) {
652 			if (error->code != GOT_ERR_OBJ_TYPE)
653 				goto done;
654 			/* "lightweight" tag */
655 			error = got_object_open_as_commit(&commit, repo, id);
656 			if (error)
657 				goto done;
658 			new_repo_tag->tagger =
659 			    strdup(got_object_commit_get_committer(commit));
660 			if (new_repo_tag->tagger == NULL) {
661 				error = got_error_from_errno("strdup");
662 				goto err;
663 			}
664 			new_repo_tag->tagger_time =
665 			    got_object_commit_get_committer_time(commit);
666 			error = got_object_id_str(&id_str, id);
667 			if (error)
668 				goto err;
669 		} else {
670 			new_repo_tag->tagger =
671 			    strdup(got_object_tag_get_tagger(tag));
672 			if (new_repo_tag->tagger == NULL) {
673 				error = got_error_from_errno("strdup");
674 				goto err;
675 			}
676 			new_repo_tag->tagger_time =
677 			    got_object_tag_get_tagger_time(tag);
678 			error = got_object_id_str(&id_str,
679 			    got_object_tag_get_object_id(tag));
680 			if (error)
681 				goto err;
682 		}
683 
684 		new_repo_tag->commit_id = strdup(id_str);
685 		if (new_repo_tag->commit_id == NULL)
686 			goto err;
687 
688 		if (commit_found == 0 && qs->commit != NULL &&
689 		    strncmp(id_str, qs->commit, strlen(id_str)) != 0)
690 			continue;
691 		else
692 			commit_found = 1;
693 
694 		t->tag_count++;
695 
696 		/*
697 		 * check for one more commit before breaking,
698 		 * so we know whether to navigate through briefs
699 		 * commits and summary
700 		 */
701 		if (chk_next) {
702 			t->next_id = strdup(new_repo_tag->commit_id);
703 			if (t->next_id == NULL) {
704 				error = got_error_from_errno("strdup");
705 				goto err;
706 			}
707 			if (commit) {
708 				got_object_commit_close(commit);
709 				commit = NULL;
710 			}
711 			TAILQ_REMOVE(&t->repo_tags, new_repo_tag, entry);
712 			gotweb_free_repo_tag(new_repo_tag);
713 			goto done;
714 		}
715 
716 		if (commit) {
717 			error = got_object_commit_get_logmsg(&tag_commit0,
718 			    commit);
719 			if (error)
720 				goto err;
721 			got_object_commit_close(commit);
722 			commit = NULL;
723 		} else {
724 			tag_commit0 = strdup(got_object_tag_get_message(tag));
725 			if (tag_commit0 == NULL) {
726 				error = got_error_from_errno("strdup");
727 				goto err;
728 			}
729 		}
730 
731 		tag_commit = tag_commit0;
732 		while (*tag_commit == '\n')
733 			tag_commit++;
734 		new_repo_tag->tag_commit = strdup(tag_commit);
735 		if (new_repo_tag->tag_commit == NULL) {
736 			error = got_error_from_errno("strdup");
737 			free(tag_commit0);
738 			goto err;
739 		}
740 		free(tag_commit0);
741 
742 		if (qs->action != SUMMARY && qs->action != TAGS) {
743 			commit_msg = commit_msg0;
744 			while (*commit_msg == '\n')
745 				commit_msg++;
746 
747 			new_repo_tag->commit_msg = strdup(commit_msg);
748 			if (new_repo_tag->commit_msg == NULL) {
749 				error = got_error_from_errno("strdup");
750 				goto err;
751 			}
752 		}
753 
754 		if (limit && --limit == 0) {
755 			if (chk_multi == 0)
756 				break;
757 			chk_next = 1;
758 		}
759 	}
760 
761 done:
762 	/*
763 	 * we have tailq populated, so find previous commit id
764 	 * for navigation through briefs and commits
765 	 */
766 	if (t->tag_count == 0) {
767 		TAILQ_FOREACH_SAFE(rt, &t->repo_tags, entry, trt) {
768 			TAILQ_REMOVE(&t->repo_tags, rt, entry);
769 			gotweb_free_repo_tag(rt);
770 		}
771 	}
772 	if (t->tag_count > 0 && t->prev_id == NULL && qs->commit != NULL) {
773 		commit_found = 0;
774 		TAILQ_FOREACH_REVERSE(rt, &t->repo_tags, repo_tags_head,
775 		    entry) {
776 			if (commit_found == 0 && rt->commit_id != NULL &&
777 			    strcmp(qs->commit, rt->commit_id) != 0) {
778 				continue;
779 			} else
780 				commit_found = 1;
781 			if (c_cnt == srv->max_commits_display ||
782 			    rt == TAILQ_FIRST(&t->repo_tags)) {
783 				t->prev_id = strdup(rt->commit_id);
784 				if (t->prev_id == NULL)
785 					error = got_error_from_errno("strdup");
786 				break;
787 			}
788 			c_cnt++;
789 		}
790 	}
791 err:
792 	if (commit)
793 		got_object_commit_close(commit);
794 	if (tag)
795 		got_object_tag_close(tag);
796 	got_ref_list_free(&refs);
797 	free(commit_msg0);
798 	free(in_repo_path);
799 	free(repo_path);
800 	free(id);
801 	free(id_str);
802 	return error;
803 }
804 
805 const struct got_error *
806 got_output_repo_tree(struct request *c)
807 {
808 	const struct got_error *error = NULL;
809 	struct transport *t = c->t;
810 	struct got_commit_object *commit = NULL;
811 	struct got_repository *repo = t->repo;
812 	struct querystring *qs = t->qs;
813 	struct repo_commit *rc = NULL;
814 	struct got_object_id *tree_id = NULL, *commit_id = NULL;
815 	struct got_reflist_head refs;
816 	struct got_tree_object *tree = NULL;
817 	struct repo_dir *repo_dir = t->repo_dir;
818 	const char *name, *index_page_str, *folder;
819 	char *id_str = NULL, *escaped_name = NULL, *path = NULL;
820 	int nentries, i, r;
821 
822 	TAILQ_INIT(&refs);
823 
824 	rc = TAILQ_FIRST(&t->repo_commits);
825 
826 	if (qs->folder != NULL) {
827 		path = strdup(qs->folder);
828 		if (path == NULL) {
829 			error = got_error_from_errno("strdup");
830 			goto done;
831 		}
832 	} else {
833 		error = got_repo_map_path(&path, repo, repo_dir->path);
834 		if (error)
835 			goto done;
836 	}
837 
838 	error = got_repo_match_object_id(&commit_id, NULL, rc->commit_id,
839 	    GOT_OBJ_TYPE_COMMIT, &refs, repo);
840 	if (error)
841 		goto done;
842 
843 	error = got_object_open_as_commit(&commit, repo, commit_id);
844 	if (error)
845 		goto done;
846 
847 	error = got_object_id_by_path(&tree_id, repo, commit, path);
848 	if (error)
849 		goto done;
850 
851 	error = got_object_open_as_tree(&tree, repo, tree_id);
852 	if (error)
853 		goto done;
854 
855 	nentries = got_object_tree_get_nentries(tree);
856 
857 	index_page_str = qs->index_page_str ? qs->index_page_str : "";
858 	folder = qs->folder ? qs->folder : "";
859 
860 	for (i = 0; i < nentries; i++) {
861 		const char *modestr;
862 		struct got_tree_entry *te;
863 		mode_t mode;
864 
865 		te = got_object_tree_get_entry(tree, i);
866 
867 		error = got_object_id_str(&id_str, got_tree_entry_get_id(te));
868 		if (error)
869 			goto done;
870 
871 		mode = got_tree_entry_get_mode(te);
872 		if (got_object_tree_entry_is_submodule(te))
873 			modestr = "$";
874 		else if (S_ISLNK(mode))
875 			modestr = "@";
876 		else if (S_ISDIR(mode))
877 			modestr = "/";
878 		else if (mode & S_IXUSR)
879 			modestr = "*";
880 		else
881 			modestr = "";
882 
883 		name = got_tree_entry_get_name(te);
884 		error = gotweb_escape_html(&escaped_name, name);
885 		if (error)
886 			goto done;
887 
888 		if (S_ISDIR(mode)) {
889 			r = fcgi_printf(c,
890 			    "<div class='tree_wrapper'>\n"
891 			    "<div class='tree_line'>"
892 			    "<a class='diff_directory' "
893 			    "href='?index_page=%s&path=%s&action=tree"
894 			    "&commit=%s&folder=%s/%s'>%s%s</a>"
895 			    "</div>\n" /* .tree_line */
896 			    "<div class='tree_line_blank'>&nbsp;</div>\n"
897 			    "</div>\n", /* .tree_wrapper */
898 			    index_page_str, qs->path, rc->commit_id,
899 			    folder, name, escaped_name, modestr);
900 			if (r == -1)
901 				goto done;
902 		} else {
903 			r = fcgi_printf(c,
904 			    "<div class='tree_wrapper'>\n"
905 			    "<div class='tree_line'>"
906 			    "<a href='?index_page=%s&path=%s&action=blob"
907 			    "&commit=%s&folder=%s&file=%s'>%s%s</a>"
908 			    "</div>\n" /* .tree_line */
909 			    "<div class='tree_line_blank'>"
910 			    "<a href='?index_page=%s&path=%s&action=commits"
911 			    "&commit=%s&folder=%s&file=%s'>commits</a>\n"
912 			    " | \n"
913 			    "<a href='?index_page=%s&path=%s&action=blame"
914 			    "&commit=%s&folder=%s&file=%s'>blame</a>\n"
915 			    "</div>\n"  /* .tree_line_blank */
916 			    "</div>\n", /* .tree_wrapper */
917 			    index_page_str, qs->path, rc->commit_id,
918 			    folder, name, escaped_name, modestr,
919 			    index_page_str, qs->path, rc->commit_id,
920 			    folder, name,
921 			    index_page_str, qs->path, rc->commit_id,
922 			    folder, name);
923 			if (r == -1)
924 				goto done;
925 		}
926 		free(id_str);
927 		id_str = NULL;
928 		free(escaped_name);
929 		escaped_name = NULL;
930 	}
931 done:
932 	free(escaped_name);
933 	free(id_str);
934 	free(path);
935 	got_ref_list_free(&refs);
936 	if (commit)
937 		got_object_commit_close(commit);
938 	free(commit_id);
939 	free(tree_id);
940 	return error;
941 }
942 
943 const struct got_error *
944 got_output_file_blob(struct request *c)
945 {
946 	const struct got_error *error = NULL;
947 	struct transport *t = c->t;
948 	struct got_repository *repo = t->repo;
949 	struct querystring *qs = c->t->qs;
950 	struct got_commit_object *commit = NULL;
951 	struct got_object_id *commit_id = NULL;
952 	struct got_reflist_head refs;
953 	struct got_blob_object *blob = NULL;
954 	char *path = NULL, *in_repo_path = NULL;
955 	int obj_type, set_mime = 0, fd = -1;
956 	size_t len, hdrlen;
957 	const uint8_t *buf;
958 
959 	TAILQ_INIT(&refs);
960 
961 	if (asprintf(&path, "%s%s%s", qs->folder ? qs->folder : "",
962 	    qs->folder ? "/" : "", qs->file) == -1) {
963 		error = got_error_from_errno("asprintf");
964 		goto done;
965 	}
966 
967 	error = got_repo_map_path(&in_repo_path, repo, path);
968 	if (error)
969 		goto done;
970 
971 	error = got_repo_match_object_id(&commit_id, NULL, qs->commit,
972 	    GOT_OBJ_TYPE_COMMIT, &refs, repo);
973 	if (error)
974 		goto done;
975 
976 	error = got_object_open_as_commit(&commit, repo, commit_id);
977 	if (error)
978 		goto done;
979 
980 	error = got_object_id_by_path(&commit_id, repo, commit, in_repo_path);
981 	if (error)
982 		goto done;
983 
984 	if (commit_id == NULL) {
985 		error = got_error(GOT_ERR_NO_OBJ);
986 		goto done;
987 	}
988 
989 	error = got_object_get_type(&obj_type, repo, commit_id);
990 	if (error)
991 		goto done;
992 
993 	if (obj_type != GOT_OBJ_TYPE_BLOB) {
994 		error = got_error(GOT_ERR_OBJ_TYPE);
995 		goto done;
996 	}
997 
998 	error = got_gotweb_dupfd(&c->priv_fd[BLOB_FD_1], &fd);
999 	if (error)
1000 		goto done;
1001 
1002 	error = got_object_open_as_blob(&blob, repo, commit_id, BUF, fd);
1003 	if (error)
1004 		goto done;
1005 	hdrlen = got_object_blob_get_hdrlen(blob);
1006 	do {
1007 		error = got_object_blob_read_block(&len, blob);
1008 		if (error)
1009 			goto done;
1010 		buf = got_object_blob_get_read_buf(blob);
1011 
1012 		/*
1013 		 * Skip blob object header first time around,
1014 		 * which also contains a zero byte.
1015 		 */
1016 		buf += hdrlen;
1017 		if (set_mime == 0) {
1018 			if (isbinary(buf, len - hdrlen)) {
1019 				error = gotweb_render_content_type_file(c,
1020 				    "application/octet-stream",
1021 				    qs->file);
1022 				if (error) {
1023 					log_warnx("%s: %s", __func__,
1024 					    error->msg);
1025 					goto done;
1026 				}
1027 			} else {
1028 				error = gotweb_render_content_type(c,
1029 				  "text/plain");
1030 				if (error) {
1031 					log_warnx("%s: %s", __func__,
1032 					    error->msg);
1033 					goto done;
1034 				}
1035 			}
1036 		}
1037 		set_mime = 1;
1038 		fcgi_gen_binary_response(c, buf, len - hdrlen);
1039 
1040 		hdrlen = 0;
1041 	} while (len != 0);
1042 done:
1043 	if (commit)
1044 		got_object_commit_close(commit);
1045 	if (fd != -1 && close(fd) == -1 && error == NULL)
1046 		error = got_error_from_errno("close");
1047 	if (blob)
1048 		got_object_blob_close(blob);
1049 	free(in_repo_path);
1050 	free(commit_id);
1051 	free(path);
1052 	return error;
1053 }
1054 
1055 struct blame_line {
1056 	int annotated;
1057 	char *id_str;
1058 	char *committer;
1059 	char datebuf[11]; /* YYYY-MM-DD + NUL */
1060 };
1061 
1062 struct blame_cb_args {
1063 	struct blame_line *lines;
1064 	int nlines;
1065 	int nlines_prec;
1066 	int lineno_cur;
1067 	off_t *line_offsets;
1068 	FILE *f;
1069 	struct got_repository *repo;
1070 	struct request *c;
1071 };
1072 
1073 static const struct got_error *
1074 got_gotweb_blame_cb(void *arg, int nlines, int lineno,
1075     struct got_commit_object *commit, struct got_object_id *id)
1076 {
1077 	const struct got_error *err = NULL;
1078 	struct blame_cb_args *a = arg;
1079 	struct blame_line *bline;
1080 	struct request *c = a->c;
1081 	struct transport *t = c->t;
1082 	struct querystring *qs = t->qs;
1083 	struct repo_dir *repo_dir = t->repo_dir;
1084 	const char *index_page_str;
1085 	char *line = NULL, *eline = NULL;
1086 	size_t linesize = 0;
1087 	off_t offset;
1088 	struct tm tm;
1089 	time_t committer_time;
1090 	int r;
1091 
1092 	if (nlines != a->nlines ||
1093 	    (lineno != -1 && lineno < 1) || lineno > a->nlines)
1094 		return got_error(GOT_ERR_RANGE);
1095 
1096 	if (lineno == -1)
1097 		return NULL; /* no change in this commit */
1098 
1099 	/* Annotate this line. */
1100 	bline = &a->lines[lineno - 1];
1101 	if (bline->annotated)
1102 		return NULL;
1103 	err = got_object_id_str(&bline->id_str, id);
1104 	if (err)
1105 		return err;
1106 
1107 	bline->committer = strdup(got_object_commit_get_committer(commit));
1108 	if (bline->committer == NULL) {
1109 		err = got_error_from_errno("strdup");
1110 		goto done;
1111 	}
1112 
1113 	committer_time = got_object_commit_get_committer_time(commit);
1114 	if (gmtime_r(&committer_time, &tm) == NULL)
1115 		return got_error_from_errno("gmtime_r");
1116 	if (strftime(bline->datebuf, sizeof(bline->datebuf), "%G-%m-%d",
1117 	    &tm) == 0) {
1118 		err = got_error(GOT_ERR_NO_SPACE);
1119 		goto done;
1120 	}
1121 	bline->annotated = 1;
1122 
1123 	/* Print lines annotated so far. */
1124 	bline = &a->lines[a->lineno_cur - 1];
1125 	if (!bline->annotated)
1126 		goto done;
1127 
1128 	offset = a->line_offsets[a->lineno_cur - 1];
1129 	if (fseeko(a->f, offset, SEEK_SET) == -1) {
1130 		err = got_error_from_errno("fseeko");
1131 		goto done;
1132 	}
1133 
1134 	index_page_str = qs->index_page_str ? qs->index_page_str : "";
1135 
1136 	while (a->lineno_cur <= a->nlines && bline->annotated) {
1137 		char *smallerthan, *at, *nl, *committer;
1138 		size_t len;
1139 
1140 		if (getline(&line, &linesize, a->f) == -1) {
1141 			if (ferror(a->f))
1142 				err = got_error_from_errno("getline");
1143 			break;
1144 		}
1145 
1146 		committer = bline->committer;
1147 		smallerthan = strchr(committer, '<');
1148 		if (smallerthan && smallerthan[1] != '\0')
1149 			committer = smallerthan + 1;
1150 		at = strchr(committer, '@');
1151 		if (at)
1152 			*at = '\0';
1153 		len = strlen(committer);
1154 		if (len >= 9)
1155 			committer[8] = '\0';
1156 
1157 		nl = strchr(line, '\n');
1158 		if (nl)
1159 			*nl = '\0';
1160 
1161 		err = gotweb_escape_html(&eline, line);
1162 		if (err)
1163 			goto done;
1164 
1165 		r = fcgi_printf(c, "<div class='blame_wrapper'>"
1166 		    "<div class='blame_number'>%.*d</div>"
1167 		    "<div class='blame_hash'>"
1168 		    "<a href='?index_page=%s&path=%s&action=diff&commit=%s'>"
1169 		    "%.8s</a>"
1170 		    "</div>"
1171 		    "<div class='blame_date'>%s</div>"
1172 		    "<div class='blame_author'>%s</div>"
1173 		    "<div class='blame_code'>%s</div>"
1174 		    "</div>",	/* .blame_wrapper */
1175 		    a->nlines_prec, a->lineno_cur,
1176 		    index_page_str, repo_dir->name, bline->id_str,
1177 		    bline->id_str,
1178 		    bline->datebuf,
1179 		    committer,
1180 		    eline);
1181 		if (r == -1)
1182 			goto done;
1183 
1184 		a->lineno_cur++;
1185 		bline = &a->lines[a->lineno_cur - 1];
1186 	}
1187 done:
1188 	free(line);
1189 	free(eline);
1190 	return err;
1191 }
1192 
1193 const struct got_error *
1194 got_output_file_blame(struct request *c)
1195 {
1196 	const struct got_error *error = NULL;
1197 	struct transport *t = c->t;
1198 	struct got_repository *repo = t->repo;
1199 	struct querystring *qs = c->t->qs;
1200 	struct got_object_id *obj_id = NULL, *commit_id = NULL;
1201 	struct got_commit_object *commit = NULL;
1202 	struct got_reflist_head refs;
1203 	struct got_blob_object *blob = NULL;
1204 	char *path = NULL, *in_repo_path = NULL;
1205 	struct blame_cb_args bca;
1206 	int i, obj_type, fd1 = -1, fd2 = -1, fd3 = -1, fd4 = -1, fd5 = -1;
1207 	int fd6 = -1;
1208 	off_t filesize;
1209 	FILE *f1 = NULL, *f2 = NULL;
1210 
1211 	TAILQ_INIT(&refs);
1212 	bca.f = NULL;
1213 	bca.lines = NULL;
1214 
1215 	if (asprintf(&path, "%s%s%s", qs->folder ? qs->folder : "",
1216 	    qs->folder ? "/" : "", qs->file) == -1) {
1217 		error = got_error_from_errno("asprintf");
1218 		goto done;
1219 	}
1220 
1221 	error = got_repo_map_path(&in_repo_path, repo, path);
1222 	if (error)
1223 		goto done;
1224 
1225 	error = got_repo_match_object_id(&commit_id, NULL, qs->commit,
1226 	    GOT_OBJ_TYPE_COMMIT, &refs, repo);
1227 	if (error)
1228 		goto done;
1229 
1230 	error = got_object_open_as_commit(&commit, repo, commit_id);
1231 	if (error)
1232 		goto done;
1233 
1234 	error = got_object_id_by_path(&obj_id, repo, commit, in_repo_path);
1235 	if (error)
1236 		goto done;
1237 
1238 	if (commit_id == NULL) {
1239 		error = got_error(GOT_ERR_NO_OBJ);
1240 		goto done;
1241 	}
1242 
1243 	error = got_object_get_type(&obj_type, repo, obj_id);
1244 	if (error)
1245 		goto done;
1246 
1247 	if (obj_type != GOT_OBJ_TYPE_BLOB) {
1248 		error = got_error(GOT_ERR_OBJ_TYPE);
1249 		goto done;
1250 	}
1251 
1252 	error = got_gotweb_openfile(&bca.f, &c->priv_fd[BLAME_FD_1], &fd1);
1253 	if (error)
1254 		goto done;
1255 
1256 	error = got_gotweb_dupfd(&c->priv_fd[BLAME_FD_2], &fd2);
1257 	if (error)
1258 		goto done;
1259 
1260 	error = got_object_open_as_blob(&blob, repo, obj_id, BUF, fd2);
1261 	if (error)
1262 		goto done;
1263 
1264 	error = got_object_blob_dump_to_file(&filesize, &bca.nlines,
1265 	    &bca.line_offsets, bca.f, blob);
1266 	if (error || bca.nlines == 0)
1267 		goto done;
1268 
1269 	/* Don't include \n at EOF in the blame line count. */
1270 	if (bca.line_offsets[bca.nlines - 1] == filesize)
1271 		bca.nlines--;
1272 
1273 	bca.lines = calloc(bca.nlines, sizeof(*bca.lines));
1274 	if (bca.lines == NULL) {
1275 		error = got_error_from_errno("calloc");
1276 		goto done;
1277 	}
1278 	bca.lineno_cur = 1;
1279 	bca.nlines_prec = 0;
1280 	i = bca.nlines;
1281 	while (i > 0) {
1282 		i /= 10;
1283 		bca.nlines_prec++;
1284 	}
1285 	bca.repo = repo;
1286 	bca.c = c;
1287 
1288 	error = got_gotweb_dupfd(&c->priv_fd[BLAME_FD_3], &fd3);
1289 	if (error)
1290 		goto done;
1291 
1292 	error = got_gotweb_dupfd(&c->priv_fd[BLAME_FD_4], &fd4);
1293 	if (error)
1294 		goto done;
1295 
1296 	error = got_gotweb_openfile(&f1, &c->priv_fd[BLAME_FD_5], &fd5);
1297 	if (error)
1298 		goto done;
1299 
1300 	error = got_gotweb_openfile(&f2, &c->priv_fd[BLAME_FD_6], &fd6);
1301 	if (error)
1302 		goto done;
1303 
1304 	error = got_blame(in_repo_path, commit_id, repo,
1305 	    GOT_DIFF_ALGORITHM_MYERS, got_gotweb_blame_cb, &bca, NULL, NULL,
1306 	    fd3, fd4, f1, f2);
1307 
1308 	if (blob) {
1309 		free(bca.line_offsets);
1310 		for (i = 0; i < bca.nlines; i++) {
1311 			struct blame_line *bline = &bca.lines[i];
1312 			free(bline->id_str);
1313 			free(bline->committer);
1314 		}
1315 	}
1316 done:
1317 	free(bca.lines);
1318 	if (fd2 != -1 && close(fd2) == -1 && error == NULL)
1319 		error = got_error_from_errno("close");
1320 	if (fd3 != -1 && close(fd3) == -1 && error == NULL)
1321 		error = got_error_from_errno("close");
1322 	if (fd4 != -1 && close(fd4) == -1 && error == NULL)
1323 		error = got_error_from_errno("close");
1324 	if (bca.f) {
1325 		const struct got_error *bca_err =
1326 		    got_gotweb_flushfile(bca.f, fd1);
1327 		if (error == NULL)
1328 			error = bca_err;
1329 	}
1330 	if (f1) {
1331 		const struct got_error *f1_err =
1332 		    got_gotweb_flushfile(f1, fd5);
1333 		if (error == NULL)
1334 			error = f1_err;
1335 	}
1336 	if (f2) {
1337 		const struct got_error *f2_err =
1338 		    got_gotweb_flushfile(f2, fd6);
1339 		if (error == NULL)
1340 			error = f2_err;
1341 	}
1342 	if (commit)
1343 		got_object_commit_close(commit);
1344 	if (blob)
1345 		got_object_blob_close(blob);
1346 	free(in_repo_path);
1347 	free(commit_id);
1348 	free(path);
1349 	return error;
1350 }
1351 
1352 const struct got_error *
1353 got_output_repo_diff(struct request *c)
1354 {
1355 	const struct got_error *error = NULL;
1356 	struct transport *t = c->t;
1357 	struct got_repository *repo = t->repo;
1358 	struct repo_commit *rc = NULL;
1359 	struct got_object_id *id1 = NULL, *id2 = NULL;
1360 	struct got_reflist_head refs;
1361 	FILE *f1 = NULL, *f2 = NULL, *f3 = NULL;
1362 	char *label1 = NULL, *label2 = NULL, *line = NULL;
1363 	char *newline, *eline = NULL, *color = NULL;
1364 	int obj_type, fd1, fd2, fd3, fd4 = -1, fd5 = -1;
1365 	size_t linesize = 0;
1366 	ssize_t linelen;
1367 	int wrlen = 0;
1368 
1369 	TAILQ_INIT(&refs);
1370 
1371 	error = got_gotweb_openfile(&f1, &c->priv_fd[DIFF_FD_1], &fd1);
1372 	if (error)
1373 		return error;
1374 
1375 	error = got_gotweb_openfile(&f2, &c->priv_fd[DIFF_FD_2], &fd2);
1376 	if (error)
1377 		return error;
1378 
1379 	error = got_gotweb_openfile(&f3, &c->priv_fd[DIFF_FD_3], &fd3);
1380 	if (error)
1381 		return error;
1382 
1383 	rc = TAILQ_FIRST(&t->repo_commits);
1384 
1385 	if (rc->parent_id != NULL &&
1386 	    strncmp(rc->parent_id, "/dev/null", 9) != 0) {
1387 		error = got_repo_match_object_id(&id1, &label1,
1388 		    rc->parent_id, GOT_OBJ_TYPE_ANY,
1389 		    &refs, repo);
1390 		if (error)
1391 			goto done;
1392 	}
1393 
1394 	error = got_repo_match_object_id(&id2, &label2, rc->commit_id,
1395 	    GOT_OBJ_TYPE_ANY, &refs, repo);
1396 	if (error)
1397 		goto done;
1398 
1399 	error = got_object_get_type(&obj_type, repo, id2);
1400 	if (error)
1401 		goto done;
1402 
1403 	error = got_gotweb_dupfd(&c->priv_fd[DIFF_FD_4], &fd4);
1404 	if (error)
1405 		goto done;
1406 
1407 	error = got_gotweb_dupfd(&c->priv_fd[DIFF_FD_5], &fd5);
1408 	if (error)
1409 		goto done;
1410 
1411 	switch (obj_type) {
1412 	case GOT_OBJ_TYPE_BLOB:
1413 		error = got_diff_objects_as_blobs(NULL, NULL, f1, f2, fd4, fd5,
1414 		     id1, id2, NULL, NULL, GOT_DIFF_ALGORITHM_MYERS, 3, 0, 0,
1415 		     repo, f3);
1416 		break;
1417 	case GOT_OBJ_TYPE_TREE:
1418 		error = got_diff_objects_as_trees(NULL, NULL, f1, f2, fd4, fd5,
1419 		    id1, id2, NULL, "", "",  GOT_DIFF_ALGORITHM_MYERS, 3, 0, 0,
1420 		    repo, f3);
1421 		break;
1422 	case GOT_OBJ_TYPE_COMMIT:
1423 		error = got_diff_objects_as_commits(NULL, NULL, f1, f2, fd4,
1424 		    fd5, id1, id2, NULL,  GOT_DIFF_ALGORITHM_MYERS, 3, 0, 0,
1425 		    repo, f3);
1426 		break;
1427 	default:
1428 		error = got_error(GOT_ERR_OBJ_TYPE);
1429 	}
1430 	if (error)
1431 		goto done;
1432 
1433 	if (fseek(f1, 0, SEEK_SET) == -1) {
1434 		error = got_ferror(f1, GOT_ERR_IO);
1435 		goto done;
1436 	}
1437 
1438 	if (fseek(f2, 0, SEEK_SET) == -1) {
1439 		error = got_ferror(f2, GOT_ERR_IO);
1440 		goto done;
1441 	}
1442 
1443 	if (fseek(f3, 0, SEEK_SET) == -1) {
1444 		error = got_ferror(f3, GOT_ERR_IO);
1445 		goto done;
1446 	}
1447 
1448 	while ((linelen = getline(&line, &linesize, f3)) != -1) {
1449 		if (strncmp(line, "-", 1) == 0) {
1450 			color = strdup("diff_minus");
1451 			if (color == NULL) {
1452 				error = got_error_from_errno("strdup");
1453 				goto done;
1454 			}
1455 		} else if (strncmp(line, "+", 1) == 0) {
1456 			color = strdup("diff_plus");
1457 			if (color == NULL) {
1458 				error = got_error_from_errno("strdup");
1459 				goto done;
1460 			}
1461 		} else if (strncmp(line, "@@", 2) == 0) {
1462 			color = strdup("diff_chunk_header");
1463 			if (color == NULL) {
1464 				error = got_error_from_errno("strdup");
1465 				goto done;
1466 			}
1467 		} else if (strncmp(line, "@@", 2) == 0) {
1468 			color = strdup("diff_chunk_header");
1469 			if (color == NULL) {
1470 				error = got_error_from_errno("strdup");
1471 				goto done;
1472 			}
1473 		} else if (strncmp(line, "commit +", 8) == 0) {
1474 			color = strdup("diff_meta");
1475 			if (color == NULL) {
1476 				error = got_error_from_errno("strdup");
1477 				goto done;
1478 			}
1479 		} else if (strncmp(line, "commit -", 8) == 0) {
1480 			color = strdup("diff_meta");
1481 			if (color == NULL) {
1482 				error = got_error_from_errno("strdup");
1483 				goto done;
1484 			}
1485 		} else if (strncmp(line, "blob +", 6) == 0) {
1486 			color = strdup("diff_meta");
1487 			if (color == NULL) {
1488 				error = got_error_from_errno("strdup");
1489 				goto done;
1490 			}
1491 		} else if (strncmp(line, "blob -", 6) == 0) {
1492 			color = strdup("diff_meta");
1493 			if (color == NULL) {
1494 				error = got_error_from_errno("strdup");
1495 				goto done;
1496 			}
1497 		} else if (strncmp(line, "file +", 6) == 0) {
1498 			color = strdup("diff_meta");
1499 			if (color == NULL) {
1500 				error = got_error_from_errno("strdup");
1501 				goto done;
1502 			}
1503 		} else if (strncmp(line, "file -", 6) == 0) {
1504 			color = strdup("diff_meta");
1505 			if (color == NULL) {
1506 				error = got_error_from_errno("strdup");
1507 				goto done;
1508 			}
1509 		} else if (strncmp(line, "from:", 5) == 0) {
1510 			color = strdup("diff_author");
1511 			if (color == NULL) {
1512 				error = got_error_from_errno("strdup");
1513 				goto done;
1514 			}
1515 		} else if (strncmp(line, "via:", 4) == 0) {
1516 			color = strdup("diff_author");
1517 			if (color == NULL) {
1518 				error = got_error_from_errno("strdup");
1519 				goto done;
1520 			}
1521 		} else if (strncmp(line, "date:", 5) == 0) {
1522 			color = strdup("diff_date");
1523 			if (color == NULL) {
1524 				error = got_error_from_errno("strdup");
1525 				goto done;
1526 			}
1527 		}
1528 
1529 		newline = strchr(line, '\n');
1530 		if (newline)
1531 			*newline = '\0';
1532 
1533 		error = gotweb_escape_html(&eline, line);
1534 		if (error)
1535 			goto done;
1536 
1537 		fcgi_printf(c, "<div class='diff_line %s'>%s</div>\n",
1538 		    color ? color : "", eline);
1539 		free(eline);
1540 		eline = NULL;
1541 
1542 		if (linelen > 0)
1543 			wrlen = wrlen + linelen;
1544 		free(color);
1545 		color = NULL;
1546 	}
1547 	if (linelen == -1 && ferror(f3))
1548 		error = got_error_from_errno("getline");
1549 done:
1550 	free(color);
1551 	if (fd4 != -1 && close(fd4) == -1 && error == NULL)
1552 		error = got_error_from_errno("close");
1553 	if (fd5 != -1 && close(fd5) == -1 && error == NULL)
1554 		error = got_error_from_errno("close");
1555 	if (f1) {
1556 		const struct got_error *f1_err =
1557 		    got_gotweb_flushfile(f1, fd1);
1558 		if (error == NULL)
1559 			error = f1_err;
1560 	}
1561 	if (f2) {
1562 		const struct got_error *f2_err =
1563 		    got_gotweb_flushfile(f2, fd2);
1564 		if (error == NULL)
1565 			error = f2_err;
1566 	}
1567 	if (f3) {
1568 		const struct got_error *f3_err =
1569 		    got_gotweb_flushfile(f3, fd3);
1570 		if (error == NULL)
1571 			error = f3_err;
1572 	}
1573 	got_ref_list_free(&refs);
1574 	free(line);
1575 	free(eline);
1576 	free(label1);
1577 	free(label2);
1578 	free(id1);
1579 	free(id2);
1580 	return error;
1581 }
1582 
1583 static const struct got_error *
1584 got_init_repo_commit(struct repo_commit **rc)
1585 {
1586 	*rc = calloc(1, sizeof(**rc));
1587 	if (*rc == NULL)
1588 		return got_error_from_errno2("%s: calloc", __func__);
1589 
1590 	(*rc)->path = NULL;
1591 	(*rc)->refs_str = NULL;
1592 	(*rc)->commit_id = NULL;
1593 	(*rc)->committer = NULL;
1594 	(*rc)->author = NULL;
1595 	(*rc)->parent_id = NULL;
1596 	(*rc)->tree_id = NULL;
1597 	(*rc)->commit_msg = NULL;
1598 
1599 	return NULL;
1600 }
1601 
1602 static const struct got_error *
1603 got_init_repo_tag(struct repo_tag **rt)
1604 {
1605 	*rt = calloc(1, sizeof(**rt));
1606 	if (*rt == NULL)
1607 		return got_error_from_errno2("%s: calloc", __func__);
1608 
1609 	(*rt)->commit_id = NULL;
1610 	(*rt)->tag_name = NULL;
1611 	(*rt)->tag_commit = NULL;
1612 	(*rt)->commit_msg = NULL;
1613 	(*rt)->tagger = NULL;
1614 
1615 	return NULL;
1616 }