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Date:: Tue Aug 9 15:56:37 2022 UTC
Message:: gotwebd: fix alternate colors in tree entries it was broken in 7ecc454 because now we're emitting tags with multiple `class' attributes (by mistake) and only the first one is used. However, instead of fixing the HTML `class' attribute, use a CSS selector to alternate the background colors. ok tracey@
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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 	const struct got_error *error = NULL;
87 
88 	*fd = dup(*priv_fd);
89 
90 	if (*fd < 0)
91 		return NULL;
92 
93 	*f = fdopen(*fd, "w+");
94 	if (*f == NULL) {
95 		close(*fd);
96 		error = got_error(GOT_ERR_PRIVSEP_NO_FD);
97 	}
98 
99 	return error;
100 }
101 
102 static const struct got_error *
103 got_gotweb_dupfd(int *priv_fd, int *fd)
104 {
105 	const struct got_error *error = NULL;
106 
107 	*fd = dup(*priv_fd);
108 
109 	if (*fd < 0)
110 		return NULL;
111 
112 	return error;
113 }
114 
115 const struct got_error *
116 got_get_repo_owner(char **owner, struct request *c, char *dir)
117 {
118 	const struct got_error *error = NULL;
119 	struct server *srv = c->srv;
120 	struct transport *t = c->t;
121 	struct got_repository *repo = t->repo;
122 	const char *gitconfig_owner;
123 
124 	*owner = NULL;
125 
126 	if (srv->show_repo_owner == 0)
127 		return NULL;
128 
129 	gitconfig_owner = got_repo_get_gitconfig_owner(repo);
130 	if (gitconfig_owner) {
131 		*owner = strdup(gitconfig_owner);
132 		if (*owner == NULL)
133 			return got_error_from_errno("strdup");
134 	}
135 	return error;
136 }
137 
138 const struct got_error *
139 got_get_repo_age(char **repo_age, struct request *c, char *dir,
140     const char *refname, int ref_tm)
141 {
142 	const struct got_error *error = NULL;
143 	struct server *srv = c->srv;
144 	struct transport *t = c->t;
145 	struct got_repository *repo = t->repo;
146 	struct got_commit_object *commit = NULL;
147 	struct got_reflist_head refs;
148 	struct got_reflist_entry *re;
149 	time_t committer_time = 0, cmp_time = 0;
150 
151 	*repo_age = NULL;
152 	TAILQ_INIT(&refs);
153 
154 	if (srv->show_repo_age == 0)
155 		return NULL;
156 
157 	error = got_ref_list(&refs, repo, "refs/heads",
158 	    got_ref_cmp_by_name, NULL);
159 	if (error)
160 		goto done;
161 
162 	/*
163 	 * Find the youngest branch tip in the repository, or the age of
164 	 * the a specific branch tip if a name was provided by the caller.
165 	 */
166 	TAILQ_FOREACH(re, &refs, entry) {
167 		struct got_object_id *id = NULL;
168 
169 		if (refname && strcmp(got_ref_get_name(re->ref), refname) != 0)
170 			continue;
171 
172 		error = got_ref_resolve(&id, repo, re->ref);
173 		if (error)
174 			goto done;
175 
176 		error = got_object_open_as_commit(&commit, repo, id);
177 		free(id);
178 		if (error)
179 			goto done;
180 
181 		committer_time =
182 		    got_object_commit_get_committer_time(commit);
183 		got_object_commit_close(commit);
184 		if (cmp_time < committer_time)
185 			cmp_time = committer_time;
186 
187 		if (refname)
188 			break;
189 	}
190 
191 	if (cmp_time != 0) {
192 		committer_time = cmp_time;
193 		error = gotweb_get_time_str(repo_age, committer_time, ref_tm);
194 	}
195 done:
196 	got_ref_list_free(&refs);
197 	return error;
198 }
199 
200 static const struct got_error *
201 got_get_repo_commit(struct request *c, struct repo_commit *repo_commit,
202     struct got_commit_object *commit, struct got_reflist_head *refs,
203     struct got_object_id *id)
204 {
205 	const struct got_error *error = NULL;
206 	struct got_reflist_entry *re;
207 	struct got_object_id *id2 = NULL;
208 	struct got_object_qid *parent_id;
209 	struct transport *t = c->t;
210 	struct querystring *qs = c->t->qs;
211 	char *commit_msg = NULL, *commit_msg0;
212 
213 	TAILQ_FOREACH(re, refs, entry) {
214 		char *s;
215 		const char *name;
216 		struct got_tag_object *tag = NULL;
217 		struct got_object_id *ref_id;
218 		int cmp;
219 
220 		if (got_ref_is_symbolic(re->ref))
221 			continue;
222 
223 		name = got_ref_get_name(re->ref);
224 		if (strncmp(name, "refs/", 5) == 0)
225 			name += 5;
226 		if (strncmp(name, "got/", 4) == 0)
227 			continue;
228 		if (strncmp(name, "heads/", 6) == 0)
229 			name += 6;
230 		if (strncmp(name, "remotes/", 8) == 0) {
231 			name += 8;
232 			s = strstr(name, "/" GOT_REF_HEAD);
233 			if (s != NULL && s[strlen(s)] == '\0')
234 				continue;
235 		}
236 		error = got_ref_resolve(&ref_id, t->repo, re->ref);
237 		if (error)
238 			return error;
239 		if (strncmp(name, "tags/", 5) == 0) {
240 			error = got_object_open_as_tag(&tag, t->repo, ref_id);
241 			if (error) {
242 				if (error->code != GOT_ERR_OBJ_TYPE) {
243 					free(ref_id);
244 					continue;
245 				}
246 				/*
247 				 * Ref points at something other
248 				 * than a tag.
249 				 */
250 				error = NULL;
251 				tag = NULL;
252 			}
253 		}
254 		cmp = got_object_id_cmp(tag ?
255 		    got_object_tag_get_object_id(tag) : ref_id, id);
256 		free(ref_id);
257 		if (tag)
258 			got_object_tag_close(tag);
259 		if (cmp != 0)
260 			continue;
261 		s = repo_commit->refs_str;
262 		if (asprintf(&repo_commit->refs_str, "%s%s%s", s ? s : "",
263 		    s ? ", " : "", name) == -1) {
264 			error = got_error_from_errno("asprintf");
265 			free(s);
266 			repo_commit->refs_str = NULL;
267 			return error;
268 		}
269 		free(s);
270 	}
271 
272 	error = got_object_id_str(&repo_commit->commit_id, id);
273 	if (error)
274 		return error;
275 
276 	error = got_object_id_str(&repo_commit->tree_id,
277 	    got_object_commit_get_tree_id(commit));
278 	if (error)
279 		return error;
280 
281 	if (qs->action == DIFF) {
282 		parent_id = STAILQ_FIRST(
283 		    got_object_commit_get_parent_ids(commit));
284 		if (parent_id != NULL) {
285 			id2 = got_object_id_dup(&parent_id->id);
286 			error = got_object_id_str(&repo_commit->parent_id, id2);
287 			if (error)
288 				return error;
289 			free(id2);
290 		} else {
291 			repo_commit->parent_id = strdup("/dev/null");
292 			if (repo_commit->parent_id == NULL) {
293 				error = got_error_from_errno("strdup");
294 				return error;
295 			}
296 		}
297 	}
298 
299 	repo_commit->committer_time =
300 	    got_object_commit_get_committer_time(commit);
301 
302 	repo_commit->author =
303 	    strdup(got_object_commit_get_author(commit));
304 	if (repo_commit->author == NULL) {
305 		error = got_error_from_errno("strdup");
306 		return error;
307 	}
308 	repo_commit->committer =
309 	    strdup(got_object_commit_get_committer(commit));
310 	if (repo_commit->committer == NULL) {
311 		error = got_error_from_errno("strdup");
312 		return error;
313 	}
314 	error = got_object_commit_get_logmsg(&commit_msg0, commit);
315 	if (error)
316 		return error;
317 
318 	commit_msg = commit_msg0;
319 	while (*commit_msg == '\n')
320 		commit_msg++;
321 
322 	repo_commit->commit_msg = strdup(commit_msg);
323 	if (repo_commit->commit_msg == NULL)
324 		error = got_error_from_errno("strdup");
325 	free(commit_msg0);
326 	return error;
327 }
328 
329 const struct got_error *
330 got_get_repo_commits(struct request *c, int limit)
331 {
332 	const struct got_error *error = NULL;
333 	struct got_object_id *id = NULL;
334 	struct got_commit_graph *graph = NULL;
335 	struct got_commit_object *commit = NULL;
336 	struct got_reflist_head refs;
337 	struct got_reference *ref;
338 	struct repo_commit *repo_commit = NULL;
339 	struct server *srv = c->srv;
340 	struct transport *t = c->t;
341 	struct got_repository *repo = t->repo;
342 	struct querystring *qs = t->qs;
343 	struct repo_dir *repo_dir = t->repo_dir;
344 	char *in_repo_path = NULL, *repo_path = NULL, *file_path = NULL;
345 	int chk_next = 0, chk_multi = 0, commit_found = 0;
346 	int obj_type, limit_chk = 0;
347 
348 	TAILQ_INIT(&refs);
349 
350 	if (qs->file != NULL && strlen(qs->file) > 0)
351 		if (asprintf(&file_path, "%s/%s", qs->folder ? qs->folder : "",
352 		    qs->file) == -1)
353 			return got_error_from_errno("asprintf");
354 
355 	if (asprintf(&repo_path, "%s/%s", srv->repos_path,
356 	    repo_dir->name) == -1)
357 		return got_error_from_errno("asprintf");
358 
359 	error = got_init_repo_commit(&repo_commit);
360 	if (error)
361 		return error;
362 
363 	/*
364 	 * XXX: jumping directly to a commit id via
365 	 * got_repo_match_object_id_prefix significantly improves performance,
366 	 * but does not allow us to create a PREVIOUS button, since commits can
367 	 * only be itereated forward. So, we have to match as we iterate from
368 	 * the headref.
369 	 */
370 	if (qs->action == BRIEFS || qs->action == COMMITS ||
371 	    (qs->action == TREE && qs->commit == NULL)) {
372 		error = got_ref_open(&ref, repo, qs->headref, 0);
373 		if (error)
374 			goto done;
375 
376 		error = got_ref_resolve(&id, repo, ref);
377 		got_ref_close(ref);
378 		if (error)
379 			goto done;
380 	} else if (qs->commit != NULL) {
381 		error = got_ref_open(&ref, repo, qs->commit, 0);
382 		if (error == NULL) {
383 			error = got_ref_resolve(&id, repo, ref);
384 			if (error)
385 				goto done;
386 			error = got_object_get_type(&obj_type, repo, id);
387 			got_ref_close(ref);
388 			if (error)
389 				goto done;
390 			if (obj_type == GOT_OBJ_TYPE_TAG) {
391 				struct got_tag_object *tag;
392 				error = got_object_open_as_tag(&tag, repo, id);
393 				if (error)
394 					goto done;
395 				if (got_object_tag_get_object_type(tag) !=
396 				    GOT_OBJ_TYPE_COMMIT) {
397 					got_object_tag_close(tag);
398 					error = got_error(GOT_ERR_OBJ_TYPE);
399 					goto done;
400 				}
401 				free(id);
402 				id = got_object_id_dup(
403 				    got_object_tag_get_object_id(tag));
404 				if (id == NULL)
405 					error = got_error_from_errno(
406 					    "got_object_id_dup");
407 				got_object_tag_close(tag);
408 				if (error)
409 					goto done;
410 			} else if (obj_type != GOT_OBJ_TYPE_COMMIT) {
411 				error = got_error(GOT_ERR_OBJ_TYPE);
412 				goto done;
413 			}
414 		}
415 		error = got_repo_match_object_id_prefix(&id, qs->commit,
416 		    GOT_OBJ_TYPE_COMMIT, repo);
417 		if (error)
418 			goto done;
419 	}
420 
421 	error = got_repo_map_path(&in_repo_path, repo, repo_path);
422 	if (error)
423 		goto done;
424 
425 	error = got_ref_list(&refs, repo, NULL, got_ref_cmp_by_name, NULL);
426 	if (error)
427 		goto done;
428 
429 	if (qs->file != NULL && strlen(qs->file) > 0) {
430 		error = got_commit_graph_open(&graph, file_path, 0);
431 		if (error)
432 			goto done;
433 	} else {
434 		error = got_commit_graph_open(&graph, in_repo_path, 0);
435 		if (error)
436 			goto done;
437 	}
438 
439 	error = got_commit_graph_iter_start(graph, id, repo, NULL, NULL);
440 	if (error)
441 		goto done;
442 
443 	for (;;) {
444 		if (limit_chk == ((limit * qs->page) - (limit - 1)) &&
445 		    commit_found == 0 && repo_commit->commit_id != NULL) {
446 			t->prev_id = strdup(repo_commit->commit_id);
447 			if (t->prev_id == NULL) {
448 				error = got_error_from_errno("strdup");
449 				goto done;
450 			}
451 		}
452 
453 		error = got_commit_graph_iter_next(&id, graph, repo, NULL,
454 		    NULL);
455 		if (error) {
456 			if (error->code == GOT_ERR_ITER_COMPLETED)
457 				error = NULL;
458 			goto done;
459 		}
460 		if (id == NULL)
461 			goto done;
462 
463 		error = got_object_open_as_commit(&commit, repo, id);
464 		if (error)
465 			goto done;
466 
467 		error = got_ref_list(&refs, repo, NULL, got_ref_cmp_by_name,
468 		    NULL);
469 		if (error)
470 			goto done;
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 		struct repo_commit *new_repo_commit = NULL;
492 		error = got_init_repo_commit(&new_repo_commit);
493 		if (error)
494 			goto done;
495 
496 		TAILQ_INSERT_TAIL(&t->repo_commits, new_repo_commit, entry);
497 
498 		error = got_get_repo_commit(c, new_repo_commit, commit,
499 		    &refs, id);
500 		if (error)
501 			goto done;
502 
503 		free(id);
504 		id = NULL;
505 
506 		if (limit == 1 && chk_multi == 0 &&
507 		    srv->max_commits_display != 1)
508 			commit_found = 1;
509 		else {
510 			chk_multi = 1;
511 
512 			/*
513 			 * check for one more commit before breaking,
514 			 * so we know whether to navigate through briefs
515 			 * commits and summary
516 			 */
517 			if (chk_next && (qs->action == BRIEFS ||
518 			    qs->action == COMMITS || qs->action == SUMMARY)) {
519 				t->next_id = strdup(new_repo_commit->commit_id);
520 				if (t->next_id == NULL) {
521 					error = got_error_from_errno("strdup");
522 					goto done;
523 				}
524 				if (commit) {
525 					got_object_commit_close(commit);
526 					commit = NULL;
527 				}
528 				if (t->next_id == NULL) {
529 					error = got_error_from_errno("strdup");
530 					goto done;
531 				}
532 				TAILQ_REMOVE(&t->repo_commits, new_repo_commit,
533 				    entry);
534 				gotweb_free_repo_commit(new_repo_commit);
535 				goto done;
536 			}
537 		}
538 		got_ref_list_free(&refs);
539 		if (error || (limit && --limit == 0)) {
540 			if (commit_found || (qs->file != NULL &&
541 			    strlen(qs->file) > 0))
542 				if (chk_multi == 0)
543 					break;
544 			chk_next = 1;
545 		}
546 		if (commit) {
547 			got_object_commit_close(commit);
548 			commit = NULL;
549 		}
550 	}
551 done:
552 	gotweb_free_repo_commit(repo_commit);
553 	if (commit)
554 		got_object_commit_close(commit);
555 	if (graph)
556 		got_commit_graph_close(graph);
557 	got_ref_list_free(&refs);
558 	free(file_path);
559 	free(repo_path);
560 	free(id);
561 	return error;
562 }
563 
564 const struct got_error *
565 got_get_repo_tags(struct request *c, int limit)
566 {
567 	const struct got_error *error = NULL;
568 	struct got_object_id *id = NULL;
569 	struct got_commit_object *commit = NULL;
570 	struct got_reflist_head refs;
571 	struct got_reference *ref;
572 	struct got_reflist_entry *re;
573 	struct server *srv = c->srv;
574 	struct transport *t = c->t;
575 	struct got_repository *repo = t->repo;
576 	struct querystring *qs = t->qs;
577 	struct repo_dir *repo_dir = t->repo_dir;
578 	struct got_tag_object *tag = NULL;
579 	struct repo_tag *rt = NULL, *trt = NULL;
580 	char *in_repo_path = NULL, *repo_path = NULL, *id_str = NULL;
581 	char *commit_msg = NULL, *commit_msg0 = NULL;
582 	int chk_next = 0, chk_multi = 1, commit_found = 0, c_cnt = 0;
583 
584 	TAILQ_INIT(&refs);
585 
586 	if (asprintf(&repo_path, "%s/%s", srv->repos_path,
587 	    repo_dir->name) == -1)
588 		return got_error_from_errno("asprintf");
589 
590 	if (error)
591 		return error;
592 
593 	if (qs->commit == NULL && qs->action == TAGS) {
594 		error = got_ref_open(&ref, repo, qs->headref, 0);
595 		if (error)
596 			goto err;
597 		error = got_ref_resolve(&id, repo, ref);
598 		got_ref_close(ref);
599 		if (error)
600 			goto err;
601 	} else if (qs->commit == NULL && qs->action == TAG) {
602 		error = got_error_msg(GOT_ERR_EOF, "commit id missing");
603 		goto err;
604 	} else {
605 		error = got_repo_match_object_id_prefix(&id, qs->commit,
606 		    GOT_OBJ_TYPE_COMMIT, repo);
607 		if (error)
608 			goto err;
609 	}
610 
611 	if (qs->action != SUMMARY && qs->action != TAGS) {
612 		error = got_object_open_as_commit(&commit, repo, id);
613 		if (error)
614 			goto err;
615 		error = got_object_commit_get_logmsg(&commit_msg0, commit);
616 		if (error)
617 			goto err;
618 		if (commit) {
619 			got_object_commit_close(commit);
620 			commit = NULL;
621 		}
622 	}
623 
624 	error = got_repo_map_path(&in_repo_path, repo, repo_path);
625 	if (error)
626 		goto err;
627 
628 	error = got_ref_list(&refs, repo, "refs/tags", got_ref_cmp_tags,
629 	   repo);
630 	if (error)
631 		goto err;
632 
633 	if (limit == 1)
634 		chk_multi = 0;
635 
636 	/*
637 	 * XXX: again, see previous message about caching
638 	 */
639 
640 	TAILQ_FOREACH(re, &refs, entry) {
641 		struct repo_tag *new_repo_tag = NULL;
642 		error = got_init_repo_tag(&new_repo_tag);
643 		if (error)
644 			goto err;
645 
646 		TAILQ_INSERT_TAIL(&t->repo_tags, new_repo_tag, entry);
647 
648 		new_repo_tag->tag_name = strdup(got_ref_get_name(re->ref));
649 		if (new_repo_tag->tag_name == NULL) {
650 			error = got_error_from_errno("strdup");
651 			goto err;
652 		}
653 
654 		error = got_ref_resolve(&id, repo, re->ref);
655 		if (error)
656 			goto done;
657 
658 		error = got_object_open_as_tag(&tag, repo, id);
659 		if (error) {
660 			if (error->code != GOT_ERR_OBJ_TYPE) {
661 				free(id);
662 				id = NULL;
663 				goto done;
664 			}
665 			/* "lightweight" tag */
666 			error = got_object_open_as_commit(&commit, repo, id);
667 			if (error) {
668 				free(id);
669 				id = NULL;
670 				goto done;
671 			}
672 			new_repo_tag->tagger =
673 			    strdup(got_object_commit_get_committer(commit));
674 			if (new_repo_tag->tagger == NULL) {
675 				error = got_error_from_errno("strdup");
676 				goto err;
677 			}
678 			new_repo_tag->tagger_time =
679 			    got_object_commit_get_committer_time(commit);
680 			error = got_object_id_str(&id_str, id);
681 			if (error)
682 				goto err;
683 			free(id);
684 			id = NULL;
685 		} else {
686 			free(id);
687 			id = NULL;
688 			new_repo_tag->tagger =
689 			    strdup(got_object_tag_get_tagger(tag));
690 			if (new_repo_tag->tagger == NULL) {
691 				error = got_error_from_errno("strdup");
692 				goto err;
693 			}
694 			new_repo_tag->tagger_time =
695 			    got_object_tag_get_tagger_time(tag);
696 			error = got_object_id_str(&id_str,
697 			    got_object_tag_get_object_id(tag));
698 			if (error)
699 				goto err;
700 		}
701 
702 		new_repo_tag->commit_id = strdup(id_str);
703 		if (new_repo_tag->commit_id == NULL)
704 			goto err;
705 
706 		if (commit_found == 0 && qs->commit != NULL &&
707 		    strncmp(id_str, qs->commit, strlen(id_str)) != 0)
708 			continue;
709 		else
710 			commit_found = 1;
711 
712 		t->tag_count++;
713 
714 		/*
715 		 * check for one more commit before breaking,
716 		 * so we know whether to navigate through briefs
717 		 * commits and summary
718 		 */
719 		if (chk_next) {
720 			t->next_id = strdup(new_repo_tag->commit_id);
721 			if (t->next_id == NULL) {
722 				error = got_error_from_errno("strdup");
723 				goto err;
724 			}
725 			if (commit) {
726 				got_object_commit_close(commit);
727 				commit = NULL;
728 			}
729 			if (t->next_id == NULL) {
730 				error = got_error_from_errno("strdup");
731 				goto err;
732 			}
733 			TAILQ_REMOVE(&t->repo_tags, new_repo_tag, entry);
734 			gotweb_free_repo_tag(new_repo_tag);
735 			goto done;
736 		}
737 
738 		if (commit) {
739 			error = got_object_commit_get_logmsg(&new_repo_tag->
740 			    tag_commit, commit);
741 			if (error)
742 				goto done;
743 			got_object_commit_close(commit);
744 			commit = NULL;
745 		} else {
746 			new_repo_tag->tag_commit =
747 			    strdup(got_object_tag_get_message(tag));
748 			if (new_repo_tag->tag_commit == NULL) {
749 				error = got_error_from_errno("strdup");
750 				goto done;
751 			}
752 		}
753 
754 		while (*new_repo_tag->tag_commit == '\n')
755 			new_repo_tag->tag_commit++;
756 
757 		if (qs->action != SUMMARY && qs->action != TAGS) {
758 			commit_msg = commit_msg0;
759 			while (*commit_msg == '\n')
760 				commit_msg++;
761 
762 			new_repo_tag->commit_msg = strdup(commit_msg);
763 			if (new_repo_tag->commit_msg == NULL) {
764 				error = got_error_from_errno("strdup");
765 				free(commit_msg0);
766 				goto err;
767 			}
768 			free(commit_msg0);
769 		}
770 
771 		if (limit && --limit == 0) {
772 			if (chk_multi == 0)
773 				break;
774 			chk_next = 1;
775 		}
776 		free(id);
777 		id = NULL;
778 	}
779 
780 done:
781 	/*
782 	 * we have tailq populated, so find previous commit id
783 	 * for navigation through briefs and commits
784 	 */
785 	if (t->tag_count == 0) {
786 		TAILQ_FOREACH_SAFE(rt, &t->repo_tags, entry, trt) {
787 			TAILQ_REMOVE(&t->repo_tags, rt, entry);
788 			gotweb_free_repo_tag(rt);
789 		}
790 	}
791 	if (t->tag_count > 0 && t->prev_id == NULL && qs->commit != NULL) {
792 		commit_found = 0;
793 		TAILQ_FOREACH_REVERSE(rt, &t->repo_tags, repo_tags_head,
794 		    entry) {
795 			if (commit_found == 0 && rt->commit_id != NULL &&
796 			    strcmp(qs->commit, rt->commit_id) != 0) {
797 				continue;
798 			} else
799 				commit_found = 1;
800 			if (c_cnt == srv->max_commits_display ||
801 			    rt == TAILQ_FIRST(&t->repo_tags)) {
802 				t->prev_id = strdup(rt->commit_id);
803 				if (t->prev_id == NULL)
804 					error = got_error_from_errno("strdup");
805 				break;
806 			}
807 			c_cnt++;
808 		}
809 	}
810 err:
811 	if (commit)
812 		got_object_commit_close(commit);
813 	got_ref_list_free(&refs);
814 	free(repo_path);
815 	free(id);
816 	return error;
817 }
818 
819 const struct got_error *
820 got_output_repo_tree(struct request *c)
821 {
822 	const struct got_error *error = NULL;
823 	struct transport *t = c->t;
824 	struct got_commit_object *commit = NULL;
825 	struct got_repository *repo = t->repo;
826 	struct querystring *qs = t->qs;
827 	struct repo_commit *rc = NULL;
828 	struct got_object_id *tree_id = NULL, *commit_id = NULL;
829 	struct got_reflist_head refs;
830 	struct got_tree_object *tree = NULL;
831 	struct repo_dir *repo_dir = t->repo_dir;
832 	char *id_str = NULL;
833 	char *path = NULL, *in_repo_path = NULL, *build_folder = NULL;
834 	char *modestr = NULL, *name = NULL;
835 	int nentries, i;
836 
837 	TAILQ_INIT(&refs);
838 
839 	rc = TAILQ_FIRST(&t->repo_commits);
840 
841 	if (qs->folder != NULL) {
842 		path = strdup(qs->folder);
843 		if (path == NULL) {
844 			error = got_error_from_errno("strdup");
845 			goto done;
846 		}
847 	} else {
848 		error = got_repo_map_path(&in_repo_path, repo, repo_dir->path);
849 		if (error)
850 			goto done;
851 		free(path);
852 		path = in_repo_path;
853 	}
854 
855 	error = got_repo_match_object_id(&commit_id, NULL, rc->commit_id,
856 	    GOT_OBJ_TYPE_COMMIT, &refs, repo);
857 	if (error)
858 		goto done;
859 
860 	error = got_object_open_as_commit(&commit, repo, commit_id);
861 	if (error)
862 		goto done;
863 
864 	error = got_object_id_by_path(&tree_id, repo, commit, path);
865 	if (error)
866 		goto done;
867 
868 	error = got_object_open_as_tree(&tree, repo, tree_id);
869 	if (error)
870 		goto done;
871 
872 	nentries = got_object_tree_get_nentries(tree);
873 
874 	for (i = 0; i < nentries; i++) {
875 		struct got_tree_entry *te;
876 		mode_t mode;
877 
878 		te = got_object_tree_get_entry(tree, i);
879 
880 		error = got_object_id_str(&id_str, got_tree_entry_get_id(te));
881 		if (error)
882 			goto done;
883 
884 		modestr = strdup("");
885 		if (modestr == NULL) {
886 			error = got_error_from_errno("strdup");
887 			goto done;
888 		}
889 		mode = got_tree_entry_get_mode(te);
890 		if (got_object_tree_entry_is_submodule(te)) {
891 			free(modestr);
892 			modestr = strdup("$");
893 			if (modestr == NULL) {
894 				error = got_error_from_errno("strdup");
895 				goto done;
896 			}
897 		} else if (S_ISLNK(mode)) {
898 			free(modestr);
899 			modestr = strdup("@");
900 			if (modestr == NULL) {
901 				error = got_error_from_errno("strdup");
902 				goto done;
903 			}
904 		} else if (S_ISDIR(mode)) {
905 			free(modestr);
906 			modestr = strdup("/");
907 			if (modestr == NULL) {
908 				error = got_error_from_errno("strdup");
909 				goto done;
910 			}
911 		} else if (mode & S_IXUSR) {
912 			free(modestr);
913 			modestr = strdup("*");
914 			if (modestr == NULL) {
915 				error = got_error_from_errno("strdup");
916 				goto done;
917 			}
918 		}
919 
920 		name = strdup(got_tree_entry_get_name(te));
921 		if (name == NULL) {
922 			error = got_error_from_errno("strdup");
923 			goto done;
924 		}
925 		if (S_ISDIR(mode)) {
926 			if (asprintf(&build_folder, "%s/%s",
927 			    qs->folder ? qs->folder : "",
928 			    got_tree_entry_get_name(te)) == -1) {
929 				error = got_error_from_errno("asprintf");
930 				goto done;
931 			}
932 
933 			if (fcgi_gen_response(c,
934 			    "<div class='tree_wrapper'>\n") == -1)
935 			goto done;
936 
937 			if (fcgi_gen_response(c, "<div class='tree_line'>") == -1)
938 				goto done;
939 
940 			if (fcgi_gen_response(c, "<a class='diff_directory' "
941 			    "href='?index_page=") == -1)
942 				goto done;
943 			if (fcgi_gen_response(c, qs->index_page_str) == -1)
944 				goto done;
945 			if (fcgi_gen_response(c, "&path=") == -1)
946 				goto done;
947 			if (fcgi_gen_response(c, qs->path) == -1)
948 				goto done;
949 			if (fcgi_gen_response(c, "&action=tree") == -1)
950 				goto done;
951 			if (fcgi_gen_response(c, "&commit=") == -1)
952 				goto done;
953 			if (fcgi_gen_response(c, rc->commit_id) == -1)
954 				goto done;
955 			if (fcgi_gen_response(c, "&folder=") == -1)
956 				goto done;
957 			if (fcgi_gen_response(c, build_folder) == -1)
958 				goto done;
959 			if (fcgi_gen_response(c, "'>") == -1)
960 				goto done;
961 			if (fcgi_gen_response(c, name) == -1)
962 				goto done;
963 			if (fcgi_gen_response(c, modestr) == -1)
964 				goto done;
965 			if (fcgi_gen_response(c, "</a>") == -1)
966 				goto done;
967 
968 			if (fcgi_gen_response(c, "</div>\n") == -1)
969 				goto done;
970 
971 			if (fcgi_gen_response(c, "<div class='tree_line_blank'>") == -1)
972 				goto done;
973 			if (fcgi_gen_response(c, "&nbsp;") == -1)
974 				goto done;
975 			if (fcgi_gen_response(c, "</div>\n") == -1)
976 				goto done;
977 
978 			if (fcgi_gen_response(c, "</div>\n") == -1)
979 				goto done;
980 
981 		} else {
982 			free(name);
983 			name = strdup(got_tree_entry_get_name(te));
984 			if (name == NULL) {
985 				error = got_error_from_errno("strdup");
986 				goto done;
987 			}
988 
989 			if (fcgi_gen_response(c,
990 			    "<div class='tree_wrapper'>\n") == -1)
991 				goto done;
992 			if (fcgi_gen_response(c, "<div class='tree_line'>") == -1)
993 				goto done;
994 
995 			if (fcgi_gen_response(c,
996 			    "<a href='?index_page=") == -1)
997 				goto done;
998 
999 			if (fcgi_gen_response(c, qs->index_page_str) == -1)
1000 				goto done;
1001 
1002 			if (fcgi_gen_response(c, "&path=") == -1)
1003 				goto done;
1004 			if (fcgi_gen_response(c, qs->path) == -1)
1005 				goto done;
1006 
1007 			if (fcgi_gen_response(c, "&action=blob") == -1)
1008 				goto done;
1009 
1010 			if (fcgi_gen_response(c, "&commit=") == -1)
1011 				goto done;
1012 			if (fcgi_gen_response(c, rc->commit_id) == -1)
1013 				goto done;
1014 
1015 			if (fcgi_gen_response(c, "&folder=") == -1)
1016 				goto done;
1017 			if (fcgi_gen_response(c, qs->folder) == -1)
1018 				goto done;
1019 
1020 			if (fcgi_gen_response(c, "&file=") == -1)
1021 				goto done;
1022 			if (fcgi_gen_response(c, name) == -1)
1023 				goto done;
1024 
1025 			if (fcgi_gen_response(c, "'>") == -1)
1026 				goto done;
1027 			if (fcgi_gen_response(c, name) == -1)
1028 				goto done;
1029 			if (fcgi_gen_response(c, modestr) == -1)
1030 				goto done;
1031 
1032 			if (fcgi_gen_response(c, "</a>") == -1)
1033 				goto done;
1034 
1035 			if (fcgi_gen_response(c, "</div>\n") == -1)
1036 				goto done;
1037 
1038 			if (fcgi_gen_response(c, "<div class='tree_line_blank'>") == -1)
1039 				goto done;
1040 
1041 			if (fcgi_gen_response(c,
1042 			    "<a href='?index_page=") == -1)
1043 				goto done;
1044 
1045 			if (fcgi_gen_response(c, qs->index_page_str) == -1)
1046 				goto done;
1047 
1048 			if (fcgi_gen_response(c, "&path=") == -1)
1049 				goto done;
1050 			if (fcgi_gen_response(c, qs->path) == -1)
1051 				goto done;
1052 
1053 			if (fcgi_gen_response(c, "&action=commits") == -1)
1054 				goto done;
1055 
1056 			if (fcgi_gen_response(c, "&commit=") == -1)
1057 				goto done;
1058 			if (fcgi_gen_response(c, rc->commit_id) == -1)
1059 				goto done;
1060 
1061 			if (fcgi_gen_response(c, "&folder=") == -1)
1062 				goto done;
1063 			if (fcgi_gen_response(c, qs->folder) == -1)
1064 				goto done;
1065 
1066 			if (fcgi_gen_response(c, "&file=") == -1)
1067 				goto done;
1068 			if (fcgi_gen_response(c, name) == -1)
1069 				goto done;
1070 
1071 			if (fcgi_gen_response(c, "'>") == -1)
1072 				goto done;
1073 
1074 			if (fcgi_gen_response(c, "commits") == -1)
1075 				goto done;
1076 			if (fcgi_gen_response(c, "</a>\n") == -1)
1077 				goto done;
1078 
1079 			if (fcgi_gen_response(c, " | \n") == -1)
1080 				goto done;
1081 
1082 			if (fcgi_gen_response(c,
1083 			    "<a href='?index_page=") == -1)
1084 				goto done;
1085 
1086 			if (fcgi_gen_response(c, qs->index_page_str) == -1)
1087 				goto done;
1088 
1089 			if (fcgi_gen_response(c, "&path=") == -1)
1090 				goto done;
1091 			if (fcgi_gen_response(c, qs->path) == -1)
1092 				goto done;
1093 
1094 			if (fcgi_gen_response(c, "&action=blame") == -1)
1095 				goto done;
1096 
1097 			if (fcgi_gen_response(c, "&commit=") == -1)
1098 				goto done;
1099 			if (fcgi_gen_response(c, rc->commit_id) == -1)
1100 				goto done;
1101 
1102 			if (fcgi_gen_response(c, "&folder=") == -1)
1103 				goto done;
1104 			if (fcgi_gen_response(c, qs->folder) == -1)
1105 				goto done;
1106 
1107 			if (fcgi_gen_response(c, "&file=") == -1)
1108 				goto done;
1109 			if (fcgi_gen_response(c, name) == -1)
1110 				goto done;
1111 
1112 			if (fcgi_gen_response(c, "'>") == -1)
1113 				goto done;
1114 
1115 			if (fcgi_gen_response(c, "blame") == -1)
1116 				goto done;
1117 			if (fcgi_gen_response(c, "</a>\n") == -1)
1118 				goto done;
1119 
1120 			if (fcgi_gen_response(c, "</div>\n") == -1)
1121 				goto done;
1122 			if (fcgi_gen_response(c, "</div>\n") == -1)
1123 				goto done;
1124 		}
1125 		free(id_str);
1126 		id_str = NULL;
1127 		free(build_folder);
1128 		build_folder = NULL;
1129 		free(name);
1130 		name = NULL;
1131 		free(modestr);
1132 		modestr = NULL;
1133 	}
1134 done:
1135 	free(id_str);
1136 	free(build_folder);
1137 	free(modestr);
1138 	free(path);
1139 	free(name);
1140 	got_ref_list_free(&refs);
1141 	if (commit)
1142 		got_object_commit_close(commit);
1143 	free(commit_id);
1144 	free(tree_id);
1145 	return error;
1146 }
1147 
1148 const struct got_error *
1149 got_output_file_blob(struct request *c)
1150 {
1151 	const struct got_error *error = NULL;
1152 	struct transport *t = c->t;
1153 	struct got_repository *repo = t->repo;
1154 	struct querystring *qs = c->t->qs;
1155 	struct got_commit_object *commit = NULL;
1156 	struct got_object_id *commit_id = NULL;
1157 	struct got_reflist_head refs;
1158 	struct got_blob_object *blob = NULL;
1159 	char *path = NULL, *in_repo_path = NULL;
1160 	int obj_type, set_mime = 0, fd = -1;
1161 	size_t len, hdrlen;
1162 	const uint8_t *buf;
1163 
1164 	TAILQ_INIT(&refs);
1165 
1166 	if (asprintf(&path, "%s%s%s", qs->folder ? qs->folder : "",
1167 	    qs->folder ? "/" : "", qs->file) == -1) {
1168 		error = got_error_from_errno("asprintf");
1169 		goto done;
1170 	}
1171 
1172 	error = got_repo_map_path(&in_repo_path, repo, path);
1173 	if (error)
1174 		goto done;
1175 
1176 	error = got_repo_match_object_id(&commit_id, NULL, qs->commit,
1177 	    GOT_OBJ_TYPE_COMMIT, &refs, repo);
1178 	if (error)
1179 		goto done;
1180 
1181 	error = got_object_open_as_commit(&commit, repo, commit_id);
1182 	if (error)
1183 		goto done;
1184 
1185 	error = got_object_id_by_path(&commit_id, repo, commit, in_repo_path);
1186 	if (error)
1187 		goto done;
1188 
1189 	if (commit_id == NULL) {
1190 		error = got_error(GOT_ERR_NO_OBJ);
1191 		goto done;
1192 	}
1193 
1194 	error = got_object_get_type(&obj_type, repo, commit_id);
1195 	if (error)
1196 		goto done;
1197 
1198 	if (obj_type != GOT_OBJ_TYPE_BLOB) {
1199 		error = got_error(GOT_ERR_OBJ_TYPE);
1200 		goto done;
1201 	}
1202 
1203 	error = got_gotweb_dupfd(&c->priv_fd[BLOB_FD_1], &fd);
1204 	if (error)
1205 		goto done;
1206 
1207 	error = got_object_open_as_blob(&blob, repo, commit_id, BUF, fd);
1208 	if (error)
1209 		goto done;
1210 	hdrlen = got_object_blob_get_hdrlen(blob);
1211 	do {
1212 		error = got_object_blob_read_block(&len, blob);
1213 		if (error)
1214 			goto done;
1215 		buf = got_object_blob_get_read_buf(blob);
1216 
1217 		/*
1218 		 * Skip blob object header first time around,
1219 		 * which also contains a zero byte.
1220 		 */
1221 		buf += hdrlen;
1222 		if (set_mime == 0) {
1223 			if (isbinary(buf, len - hdrlen)) {
1224 				error = gotweb_render_content_type_file(c,
1225 				    "application/octet-stream",
1226 				    qs->file);
1227 				if (error) {
1228 					log_warnx("%s: %s", __func__,
1229 					    error->msg);
1230 					goto done;
1231 				}
1232 			} else {
1233 				error = gotweb_render_content_type(c,
1234 				  "text/plain");
1235 				if (error) {
1236 					log_warnx("%s: %s", __func__,
1237 					    error->msg);
1238 					goto done;
1239 				}
1240 			}
1241 		}
1242 		set_mime = 1;
1243 		fcgi_gen_binary_response(c, buf, len - hdrlen);
1244 
1245 		hdrlen = 0;
1246 	} while (len != 0);
1247 done:
1248 	if (commit)
1249 		got_object_commit_close(commit);
1250 	if (fd != -1 && close(fd) == -1 && error == NULL)
1251 		error = got_error_from_errno("close");
1252 	if (blob)
1253 		got_object_blob_close(blob);
1254 	free(in_repo_path);
1255 	free(commit_id);
1256 	free(path);
1257 	return error;
1258 }
1259 
1260 struct blame_line {
1261 	int annotated;
1262 	char *id_str;
1263 	char *committer;
1264 	char datebuf[11]; /* YYYY-MM-DD + NUL */
1265 };
1266 
1267 struct blame_cb_args {
1268 	struct blame_line *lines;
1269 	int nlines;
1270 	int nlines_prec;
1271 	int lineno_cur;
1272 	off_t *line_offsets;
1273 	FILE *f;
1274 	struct got_repository *repo;
1275 	struct request *c;
1276 };
1277 
1278 static const struct got_error *
1279 got_gotweb_blame_cb(void *arg, int nlines, int lineno,
1280     struct got_commit_object *commit, struct got_object_id *id)
1281 {
1282 	const struct got_error *err = NULL;
1283 	struct blame_cb_args *a = arg;
1284 	struct blame_line *bline;
1285 	struct request *c = a->c;
1286 	struct transport *t = c->t;
1287 	struct querystring *qs = t->qs;
1288 	struct repo_dir *repo_dir = t->repo_dir;
1289 	char *line = NULL, *eline = NULL;
1290 	size_t linesize = 0;
1291 	off_t offset;
1292 	struct tm tm;
1293 	time_t committer_time;
1294 
1295 	if (nlines != a->nlines ||
1296 	    (lineno != -1 && lineno < 1) || lineno > a->nlines)
1297 		return got_error(GOT_ERR_RANGE);
1298 
1299 	if (lineno == -1)
1300 		return NULL; /* no change in this commit */
1301 
1302 	/* Annotate this line. */
1303 	bline = &a->lines[lineno - 1];
1304 	if (bline->annotated)
1305 		return NULL;
1306 	err = got_object_id_str(&bline->id_str, id);
1307 	if (err)
1308 		return err;
1309 
1310 	bline->committer = strdup(got_object_commit_get_committer(commit));
1311 	if (bline->committer == NULL) {
1312 		err = got_error_from_errno("strdup");
1313 		goto done;
1314 	}
1315 
1316 	committer_time = got_object_commit_get_committer_time(commit);
1317 	if (gmtime_r(&committer_time, &tm) == NULL)
1318 		return got_error_from_errno("gmtime_r");
1319 	if (strftime(bline->datebuf, sizeof(bline->datebuf), "%G-%m-%d",
1320 	    &tm) == 0) {
1321 		err = got_error(GOT_ERR_NO_SPACE);
1322 		goto done;
1323 	}
1324 	bline->annotated = 1;
1325 
1326 	/* Print lines annotated so far. */
1327 	bline = &a->lines[a->lineno_cur - 1];
1328 	if (!bline->annotated)
1329 		goto done;
1330 
1331 	offset = a->line_offsets[a->lineno_cur - 1];
1332 	if (fseeko(a->f, offset, SEEK_SET) == -1) {
1333 		err = got_error_from_errno("fseeko");
1334 		goto done;
1335 	}
1336 
1337 	while (bline->annotated) {
1338 		int out_buff_size = 100;
1339 		char *smallerthan, *at, *nl, *committer;
1340 		char out_buff[out_buff_size];
1341 		size_t len;
1342 
1343 		if (getline(&line, &linesize, a->f) == -1) {
1344 			if (ferror(a->f))
1345 				err = got_error_from_errno("getline");
1346 			break;
1347 		}
1348 
1349 		committer = bline->committer;
1350 		smallerthan = strchr(committer, '<');
1351 		if (smallerthan && smallerthan[1] != '\0')
1352 			committer = smallerthan + 1;
1353 		at = strchr(committer, '@');
1354 		if (at)
1355 			*at = '\0';
1356 		len = strlen(committer);
1357 		if (len >= 9)
1358 			committer[8] = '\0';
1359 
1360 		nl = strchr(line, '\n');
1361 		if (nl)
1362 			*nl = '\0';
1363 
1364 		if (fcgi_gen_response(c, "<div class='blame_wrapper'>") == -1)
1365 			goto done;
1366 		if (fcgi_gen_response(c, "<div class='blame_number'>") == -1)
1367 			goto done;
1368 		if (snprintf(out_buff, strlen(out_buff), "%.*d", a->nlines_prec,
1369 		    a->lineno_cur) < 0)
1370 			goto done;
1371 		if (fcgi_gen_response(c, out_buff) == -1)
1372 			goto done;
1373 		if (fcgi_gen_response(c, "</div>") == -1)
1374 			goto done;
1375 
1376 		if (fcgi_gen_response(c, "<div class='blame_hash'>") == -1)
1377 			goto done;
1378 
1379 		if (fcgi_gen_response(c, "<a href='?index_page=") == -1)
1380 			goto done;
1381 		if (fcgi_gen_response(c, qs->index_page_str) == -1)
1382 			goto done;
1383 		if (fcgi_gen_response(c, "&path=") == -1)
1384 			goto done;
1385 		if (fcgi_gen_response(c, repo_dir->name) == -1)
1386 			goto done;
1387 		if (fcgi_gen_response(c, "&action=diff&commit=") == -1)
1388 			goto done;
1389 		if (fcgi_gen_response(c, bline->id_str) == -1)
1390 			goto done;
1391 		if (fcgi_gen_response(c, "'>") == -1)
1392 			goto done;
1393 		if (snprintf(out_buff, 10, "%.8s", bline->id_str) < 0)
1394 			goto done;
1395 		if (fcgi_gen_response(c, out_buff) == -1)
1396 			goto done;
1397 		if (fcgi_gen_response(c, "</a></div>") == -1)
1398 			goto done;
1399 
1400 		if (fcgi_gen_response(c, "<div class='blame_date'>") == -1)
1401 			goto done;
1402 		if (fcgi_gen_response(c, bline->datebuf) == -1)
1403 			goto done;
1404 		if (fcgi_gen_response(c, "</div>") == -1)
1405 			goto done;
1406 
1407 		if (fcgi_gen_response(c, "<div class='blame_author'>") == -1)
1408 			goto done;
1409 		if (fcgi_gen_response(c, committer) == -1)
1410 			goto done;
1411 		if (fcgi_gen_response(c, "</div>") == -1)
1412 			goto done;
1413 
1414 		if (fcgi_gen_response(c, "<div class='blame_code'>") == -1)
1415 			goto done;
1416 		err = gotweb_escape_html(&eline, line);
1417 		if (err)
1418 			goto done;
1419 		if (fcgi_gen_response(c, eline) == -1)
1420 			goto done;
1421 		if (fcgi_gen_response(c, "</div>") == -1)
1422 			goto done;
1423 
1424 		if (fcgi_gen_response(c, "</div>") == -1)
1425 			goto done;
1426 		a->lineno_cur++;
1427 		bline = &a->lines[a->lineno_cur - 1];
1428 	}
1429 done:
1430 	free(line);
1431 	free(eline);
1432 	return err;
1433 }
1434 
1435 const struct got_error *
1436 got_output_file_blame(struct request *c)
1437 {
1438 	const struct got_error *error = NULL;
1439 	struct transport *t = c->t;
1440 	struct got_repository *repo = t->repo;
1441 	struct querystring *qs = c->t->qs;
1442 	struct got_object_id *obj_id = NULL, *commit_id = NULL;
1443 	struct got_commit_object *commit = NULL;
1444 	struct got_reflist_head refs;
1445 	struct got_blob_object *blob = NULL;
1446 	char *path = NULL, *in_repo_path = NULL;
1447 	struct blame_cb_args bca;
1448 	int i, obj_type, fd1 = -1, fd2 = -1, fd3 = -1, fd4 = -1, fd5 = -1;
1449 	int fd6 = -1;
1450 	off_t filesize;
1451 	FILE *f1 = NULL, *f2 = NULL;
1452 
1453 	TAILQ_INIT(&refs);
1454 	bca.f = NULL;
1455 	bca.lines = NULL;
1456 
1457 	if (asprintf(&path, "%s%s%s", qs->folder ? qs->folder : "",
1458 	    qs->folder ? "/" : "", qs->file) == -1) {
1459 		error = got_error_from_errno("asprintf");
1460 		goto done;
1461 	}
1462 
1463 	error = got_repo_map_path(&in_repo_path, repo, path);
1464 	if (error)
1465 		goto done;
1466 
1467 	error = got_repo_match_object_id(&commit_id, NULL, qs->commit,
1468 	    GOT_OBJ_TYPE_COMMIT, &refs, repo);
1469 	if (error)
1470 		goto done;
1471 
1472 	error = got_object_open_as_commit(&commit, repo, commit_id);
1473 	if (error)
1474 		goto done;
1475 
1476 	error = got_object_id_by_path(&obj_id, repo, commit, in_repo_path);
1477 	if (error)
1478 		goto done;
1479 
1480 	if (commit_id == NULL) {
1481 		error = got_error(GOT_ERR_NO_OBJ);
1482 		goto done;
1483 	}
1484 
1485 	error = got_object_get_type(&obj_type, repo, obj_id);
1486 	if (error)
1487 		goto done;
1488 
1489 	if (obj_type != GOT_OBJ_TYPE_BLOB) {
1490 		error = got_error(GOT_ERR_OBJ_TYPE);
1491 		goto done;
1492 	}
1493 
1494 	error = got_gotweb_openfile(&bca.f, &c->priv_fd[BLAME_FD_1], &fd1);
1495 	if (error)
1496 		goto done;
1497 
1498 	error = got_gotweb_dupfd(&c->priv_fd[BLAME_FD_2], &fd2);
1499 	if (error)
1500 		goto done;
1501 
1502 	error = got_object_open_as_blob(&blob, repo, obj_id, BUF, fd2);
1503 	if (error)
1504 		goto done;
1505 
1506 	error = got_object_blob_dump_to_file(&filesize, &bca.nlines,
1507 	    &bca.line_offsets, bca.f, blob);
1508 	if (error || bca.nlines == 0)
1509 		goto done;
1510 
1511 	/* Don't include \n at EOF in the blame line count. */
1512 	if (bca.line_offsets[bca.nlines - 1] == filesize)
1513 		bca.nlines--;
1514 
1515 	bca.lines = calloc(bca.nlines, sizeof(*bca.lines));
1516 	if (bca.lines == NULL) {
1517 		error = got_error_from_errno("calloc");
1518 		goto done;
1519 	}
1520 	bca.lineno_cur = 1;
1521 	bca.nlines_prec = 0;
1522 	i = bca.nlines;
1523 	while (i > 0) {
1524 		i /= 10;
1525 		bca.nlines_prec++;
1526 	}
1527 	bca.repo = repo;
1528 	bca.c = c;
1529 
1530 	error = got_gotweb_dupfd(&c->priv_fd[BLAME_FD_3], &fd3);
1531 	if (error)
1532 		goto done;
1533 
1534 	error = got_gotweb_dupfd(&c->priv_fd[BLAME_FD_4], &fd4);
1535 	if (error)
1536 		goto done;
1537 
1538 	error = got_gotweb_openfile(&f1, &c->priv_fd[BLAME_FD_5], &fd5);
1539 	if (error)
1540 		goto done;
1541 
1542 	error = got_gotweb_openfile(&f2, &c->priv_fd[BLAME_FD_6], &fd6);
1543 	if (error)
1544 		goto done;
1545 
1546 	error = got_blame(in_repo_path, commit_id, repo,
1547 	    GOT_DIFF_ALGORITHM_MYERS, got_gotweb_blame_cb, &bca, NULL, NULL,
1548 	    fd3, fd4, f1, f2);
1549 
1550 	if (blob) {
1551 		free(bca.line_offsets);
1552 		for (i = 0; i < bca.nlines; i++) {
1553 			struct blame_line *bline = &bca.lines[i];
1554 			free(bline->id_str);
1555 			free(bline->committer);
1556 		}
1557 	}
1558 done:
1559 	free(bca.lines);
1560 	if (fd2 != -1 && close(fd2) == -1 && error == NULL)
1561 		error = got_error_from_errno("close");
1562 	if (fd3 != -1 && close(fd3) == -1 && error == NULL)
1563 		error = got_error_from_errno("close");
1564 	if (fd4 != -1 && close(fd4) == -1 && error == NULL)
1565 		error = got_error_from_errno("close");
1566 	if (bca.f) {
1567 		const struct got_error *bca_err =
1568 		    got_gotweb_flushfile(bca.f, fd1);
1569 		if (error == NULL)
1570 			error = bca_err;
1571 	}
1572 	if (f1) {
1573 		const struct got_error *f1_err =
1574 		    got_gotweb_flushfile(f1, fd5);
1575 		if (error == NULL)
1576 			error = f1_err;
1577 	}
1578 	if (f2) {
1579 		const struct got_error *f2_err =
1580 		    got_gotweb_flushfile(f2, fd6);
1581 		if (error == NULL)
1582 			error = f2_err;
1583 	}
1584 	if (commit)
1585 		got_object_commit_close(commit);
1586 	if (blob)
1587 		got_object_blob_close(blob);
1588 	free(in_repo_path);
1589 	free(commit_id);
1590 	free(path);
1591 	return error;
1592 }
1593 
1594 const struct got_error *
1595 got_output_repo_diff(struct request *c)
1596 {
1597 	const struct got_error *error = NULL;
1598 	struct transport *t = c->t;
1599 	struct got_repository *repo = t->repo;
1600 	struct repo_commit *rc = NULL;
1601 	struct got_object_id *id1 = NULL, *id2 = NULL;
1602 	struct got_reflist_head refs;
1603 	FILE *f1 = NULL, *f2 = NULL, *f3 = NULL;
1604 	char *label1 = NULL, *label2 = NULL, *line = NULL;
1605 	char *newline, *eline = NULL, *color = NULL;
1606 	int obj_type, fd1, fd2, fd3, fd4 = -1, fd5 = -1;
1607 	size_t linesize = 0;
1608 	ssize_t linelen;
1609 	int wrlen = 0;
1610 
1611 	TAILQ_INIT(&refs);
1612 
1613 	error = got_gotweb_openfile(&f1, &c->priv_fd[DIFF_FD_1], &fd1);
1614 	if (error)
1615 		return error;
1616 
1617 	error = got_gotweb_openfile(&f2, &c->priv_fd[DIFF_FD_2], &fd2);
1618 	if (error)
1619 		return error;
1620 
1621 	error = got_gotweb_openfile(&f3, &c->priv_fd[DIFF_FD_3], &fd3);
1622 	if (error)
1623 		return error;
1624 
1625 	rc = TAILQ_FIRST(&t->repo_commits);
1626 
1627 	if (rc->parent_id != NULL &&
1628 	    strncmp(rc->parent_id, "/dev/null", 9) != 0) {
1629 		error = got_repo_match_object_id(&id1, &label1,
1630 		    rc->parent_id, GOT_OBJ_TYPE_ANY,
1631 		    &refs, repo);
1632 		if (error)
1633 			goto done;
1634 	}
1635 
1636 	error = got_repo_match_object_id(&id2, &label2, rc->commit_id,
1637 	    GOT_OBJ_TYPE_ANY, &refs, repo);
1638 	if (error)
1639 		goto done;
1640 
1641 	error = got_object_get_type(&obj_type, repo, id2);
1642 	if (error)
1643 		goto done;
1644 
1645 	error = got_gotweb_dupfd(&c->priv_fd[DIFF_FD_4], &fd4);
1646 	if (error)
1647 		goto done;
1648 
1649 	error = got_gotweb_dupfd(&c->priv_fd[DIFF_FD_5], &fd5);
1650 	if (error)
1651 		goto done;
1652 
1653 	switch (obj_type) {
1654 	case GOT_OBJ_TYPE_BLOB:
1655 		error = got_diff_objects_as_blobs(NULL, NULL, f1, f2, fd4, fd5,
1656 		     id1, id2, NULL, NULL, GOT_DIFF_ALGORITHM_MYERS, 3, 0, 0,
1657 		     repo, f3);
1658 		break;
1659 	case GOT_OBJ_TYPE_TREE:
1660 		error = got_diff_objects_as_trees(NULL, NULL, f1, f2, fd4, fd5,
1661 		    id1, id2, NULL, "", "",  GOT_DIFF_ALGORITHM_MYERS, 3, 0, 0,
1662 		    repo, f3);
1663 		break;
1664 	case GOT_OBJ_TYPE_COMMIT:
1665 		error = got_diff_objects_as_commits(NULL, NULL, f1, f2, fd4,
1666 		    fd5, id1, id2, NULL,  GOT_DIFF_ALGORITHM_MYERS, 3, 0, 0,
1667 		    repo, f3);
1668 		break;
1669 	default:
1670 		error = got_error(GOT_ERR_OBJ_TYPE);
1671 	}
1672 	if (error)
1673 		goto done;
1674 
1675 	if (fseek(f1, 0, SEEK_SET) == -1) {
1676 		error = got_ferror(f1, GOT_ERR_IO);
1677 		goto done;
1678 	}
1679 
1680 	if (fseek(f2, 0, SEEK_SET) == -1) {
1681 		error = got_ferror(f2, GOT_ERR_IO);
1682 		goto done;
1683 	}
1684 
1685 	if (fseek(f3, 0, SEEK_SET) == -1) {
1686 		error = got_ferror(f3, GOT_ERR_IO);
1687 		goto done;
1688 	}
1689 
1690 	while ((linelen = getline(&line, &linesize, f3)) != -1) {
1691 		if (strncmp(line, "-", 1) == 0) {
1692 			color = strdup("diff_minus");
1693 			if (color == NULL) {
1694 				error = got_error_from_errno("strdup");
1695 				goto done;
1696 			}
1697 		} else if (strncmp(line, "+", 1) == 0) {
1698 			color = strdup("diff_plus");
1699 			if (color == NULL) {
1700 				error = got_error_from_errno("strdup");
1701 				goto done;
1702 			}
1703 		} else if (strncmp(line, "@@", 2) == 0) {
1704 			color = strdup("diff_chunk_header");
1705 			if (color == NULL) {
1706 				error = got_error_from_errno("strdup");
1707 				goto done;
1708 			}
1709 		} else if (strncmp(line, "@@", 2) == 0) {
1710 			color = strdup("diff_chunk_header");
1711 			if (color == NULL) {
1712 				error = got_error_from_errno("strdup");
1713 				goto done;
1714 			}
1715 		} else if (strncmp(line, "commit +", 8) == 0) {
1716 			color = strdup("diff_meta");
1717 			if (color == NULL) {
1718 				error = got_error_from_errno("strdup");
1719 				goto done;
1720 			}
1721 		} else if (strncmp(line, "commit -", 8) == 0) {
1722 			color = strdup("diff_meta");
1723 			if (color == NULL) {
1724 				error = got_error_from_errno("strdup");
1725 				goto done;
1726 			}
1727 		} else if (strncmp(line, "blob +", 6) == 0) {
1728 			color = strdup("diff_meta");
1729 			if (color == NULL) {
1730 				error = got_error_from_errno("strdup");
1731 				goto done;
1732 			}
1733 		} else if (strncmp(line, "blob -", 6) == 0) {
1734 			color = strdup("diff_meta");
1735 			if (color == NULL) {
1736 				error = got_error_from_errno("strdup");
1737 				goto done;
1738 			}
1739 		} else if (strncmp(line, "file +", 6) == 0) {
1740 			color = strdup("diff_meta");
1741 			if (color == NULL) {
1742 				error = got_error_from_errno("strdup");
1743 				goto done;
1744 			}
1745 		} else if (strncmp(line, "file -", 6) == 0) {
1746 			color = strdup("diff_meta");
1747 			if (color == NULL) {
1748 				error = got_error_from_errno("strdup");
1749 				goto done;
1750 			}
1751 		} else if (strncmp(line, "from:", 5) == 0) {
1752 			color = strdup("diff_author");
1753 			if (color == NULL) {
1754 				error = got_error_from_errno("strdup");
1755 				goto done;
1756 			}
1757 		} else if (strncmp(line, "via:", 4) == 0) {
1758 			color = strdup("diff_author");
1759 			if (color == NULL) {
1760 				error = got_error_from_errno("strdup");
1761 				goto done;
1762 			}
1763 		} else if (strncmp(line, "date:", 5) == 0) {
1764 			color = strdup("diff_date");
1765 			if (color == NULL) {
1766 				error = got_error_from_errno("strdup");
1767 				goto done;
1768 			}
1769 		}
1770 		if (fcgi_gen_response(c, "<div class='diff_line' class='") == -1)
1771 			goto done;
1772 		if (fcgi_gen_response(c, color ? color : "") == -1)
1773 			goto done;
1774 		if (fcgi_gen_response(c, "'>") == -1)
1775 			goto done;
1776 		newline = strchr(line, '\n');
1777 		if (newline)
1778 			*newline = '\0';
1779 
1780 		error = gotweb_escape_html(&eline, line);
1781 		if (error)
1782 			goto done;
1783 		if (fcgi_gen_response(c, eline) == -1)
1784 			goto done;
1785 		free(eline);
1786 		eline = NULL;
1787 
1788 		if (fcgi_gen_response(c, "</div>\n") == -1)
1789 			goto done;
1790 		if (linelen > 0)
1791 			wrlen = wrlen + linelen;
1792 		free(color);
1793 		color = NULL;
1794 	}
1795 	if (linelen == -1 && ferror(f3))
1796 		error = got_error_from_errno("getline");
1797 done:
1798 	free(color);
1799 	if (fd4 != -1 && close(fd4) == -1 && error == NULL)
1800 		error = got_error_from_errno("close");
1801 	if (fd5 != -1 && close(fd5) == -1 && error == NULL)
1802 		error = got_error_from_errno("close");
1803 	if (f1) {
1804 		const struct got_error *f1_err =
1805 		    got_gotweb_flushfile(f1, fd1);
1806 		if (error == NULL)
1807 			error = f1_err;
1808 	}
1809 	if (f2) {
1810 		const struct got_error *f2_err =
1811 		    got_gotweb_flushfile(f2, fd2);
1812 		if (error == NULL)
1813 			error = f2_err;
1814 	}
1815 	if (f3) {
1816 		const struct got_error *f3_err =
1817 		    got_gotweb_flushfile(f3, fd3);
1818 		if (error == NULL)
1819 			error = f3_err;
1820 	}
1821 	got_ref_list_free(&refs);
1822 	free(line);
1823 	free(eline);
1824 	free(label1);
1825 	free(label2);
1826 	free(id1);
1827 	free(id2);
1828 	return error;
1829 }
1830 
1831 static const struct got_error *
1832 got_init_repo_commit(struct repo_commit **rc)
1833 {
1834 	const struct got_error *error = NULL;
1835 
1836 	*rc = calloc(1, sizeof(**rc));
1837 	if (*rc == NULL)
1838 		return got_error_from_errno2("%s: calloc", __func__);
1839 
1840 	(*rc)->path = NULL;
1841 	(*rc)->refs_str = NULL;
1842 	(*rc)->commit_id = NULL;
1843 	(*rc)->committer = NULL;
1844 	(*rc)->author = NULL;
1845 	(*rc)->parent_id = NULL;
1846 	(*rc)->tree_id = NULL;
1847 	(*rc)->commit_msg = NULL;
1848 
1849 	return error;
1850 }
1851 
1852 static const struct got_error *
1853 got_init_repo_tag(struct repo_tag **rt)
1854 {
1855 	const struct got_error *error = NULL;
1856 
1857 	*rt = calloc(1, sizeof(**rt));
1858 	if (*rt == NULL)
1859 		return got_error_from_errno2("%s: calloc", __func__);
1860 
1861 	(*rt)->commit_id = NULL;
1862 	(*rt)->tag_name = NULL;
1863 	(*rt)->tag_commit = NULL;
1864 	(*rt)->commit_msg = NULL;
1865 	(*rt)->tagger = NULL;
1866 
1867 	return error;
1868 }