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