Game of Trees Repos

Blob

Date:: Fri Jun 16 08:37:38 2023 UTC
Message:: dropping unnecessary strlen()s ok jamsek, stsp
Actions:: History | Blame | Raw File
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 <sha2.h>
26 #include <stdlib.h>
27 #include <stdio.h>
28 #include <string.h>
29 #include <unistd.h>
30 
31 #include "got_error.h"
32 #include "got_object.h"
33 #include "got_reference.h"
34 #include "got_repository.h"
35 #include "got_path.h"
36 #include "got_cancel.h"
37 #include "got_diff.h"
38 #include "got_commit_graph.h"
39 #include "got_blame.h"
40 #include "got_privsep.h"
41 
42 #include "proc.h"
43 #include "gotwebd.h"
44 
45 static const struct got_error *got_init_repo_commit(struct repo_commit **);
46 static const struct got_error *got_init_repo_tag(struct repo_tag **);
47 static const struct got_error *got_get_repo_commit(struct request *,
48     struct repo_commit *, struct got_commit_object *, struct got_reflist_head *,
49     struct got_object_id *);
50 static const struct got_error *got_gotweb_dupfd(int *, int *);
51 static const struct got_error *got_gotweb_openfile(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 const struct got_error *
56 got_gotweb_closefile(FILE *f)
57 {
58 	const struct got_error *err = NULL;
59 
60 	if (fseek(f, 0, SEEK_SET) == -1)
61 		err = got_error_from_errno("fseek");
62 
63 	if (err == NULL && ftruncate(fileno(f), 0) == -1)
64 		err = got_error_from_errno("ftruncate");
65 
66 	if (fclose(f) == EOF && err == NULL)
67 		err = got_error_from_errno("fclose");
68 
69 	return err;
70 }
71 
72 static const struct got_error *
73 got_gotweb_openfile(FILE **f, int *priv_fd)
74 {
75 	int fd;
76 
77 	fd = dup(*priv_fd);
78 	if (fd == -1)
79 		return got_error_from_errno("dup");
80 
81 	*f = fdopen(fd, "w+");
82 	if (*f == NULL) {
83 		close(fd);
84 		return got_error(GOT_ERR_PRIVSEP_NO_FD);
85 	}
86 
87 	return NULL;
88 }
89 
90 static const struct got_error *
91 got_gotweb_dupfd(int *priv_fd, int *fd)
92 {
93 	*fd = dup(*priv_fd);
94 
95 	if (*fd == -1)
96 		return got_error_from_errno("dup");
97 
98 	return NULL;
99 }
100 
101 const struct got_error *
102 got_get_repo_owner(char **owner, struct request *c)
103 {
104 	struct server *srv = c->srv;
105 	struct transport *t = c->t;
106 	struct got_repository *repo = t->repo;
107 	const char *gitconfig_owner;
108 
109 	*owner = NULL;
110 
111 	if (srv->show_repo_owner == 0)
112 		return NULL;
113 
114 	gitconfig_owner = got_repo_get_gitconfig_owner(repo);
115 	if (gitconfig_owner) {
116 		*owner = strdup(gitconfig_owner);
117 		if (*owner == NULL)
118 			return got_error_from_errno("strdup");
119 	} else {
120 		*owner = strdup("");
121 		if (*owner == NULL)
122 			return got_error_from_errno("strdup");
123 	}
124 	return NULL;
125 }
126 
127 const struct got_error *
128 got_get_repo_age(time_t *repo_age, struct request *c, const char *refname)
129 {
130 	const struct got_error *error = NULL;
131 	struct server *srv = c->srv;
132 	struct transport *t = c->t;
133 	struct got_repository *repo = t->repo;
134 	struct got_commit_object *commit = NULL;
135 	struct got_reflist_head refs;
136 	struct got_reflist_entry *re;
137 	time_t committer_time = 0, cmp_time = 0;
138 
139 	TAILQ_INIT(&refs);
140 
141 	if (srv->show_repo_age == 0)
142 		return NULL;
143 
144 	error = got_ref_list(&refs, repo, "refs/heads",
145 	    got_ref_cmp_by_name, NULL);
146 	if (error)
147 		goto done;
148 
149 	/*
150 	 * Find the youngest branch tip in the repository, or the age of
151 	 * the a specific branch tip if a name was provided by the caller.
152 	 */
153 	TAILQ_FOREACH(re, &refs, entry) {
154 		struct got_object_id *id = NULL;
155 
156 		if (refname && strcmp(got_ref_get_name(re->ref), refname) != 0)
157 			continue;
158 
159 		error = got_ref_resolve(&id, repo, re->ref);
160 		if (error)
161 			goto done;
162 
163 		error = got_object_open_as_commit(&commit, repo, id);
164 		free(id);
165 		if (error)
166 			goto done;
167 
168 		committer_time =
169 		    got_object_commit_get_committer_time(commit);
170 		got_object_commit_close(commit);
171 		if (cmp_time < committer_time)
172 			cmp_time = committer_time;
173 
174 		if (refname)
175 			break;
176 	}
177 
178 	if (cmp_time != 0)
179 		*repo_age = cmp_time;
180  done:
181 	got_ref_list_free(&refs);
182 	return error;
183 }
184 
185 static const struct got_error *
186 got_get_repo_commit(struct request *c, struct repo_commit *repo_commit,
187     struct got_commit_object *commit, struct got_reflist_head *refs,
188     struct got_object_id *id)
189 {
190 	const struct got_error *error = NULL;
191 	struct got_reflist_entry *re;
192 	struct got_object_id *id2 = NULL;
193 	struct got_object_qid *parent_id;
194 	struct transport *t = c->t;
195 	struct querystring *qs = c->t->qs;
196 	char *commit_msg = NULL, *commit_msg0;
197 
198 	TAILQ_FOREACH(re, refs, entry) {
199 		char *s;
200 		const char *name;
201 		struct got_tag_object *tag = NULL;
202 		struct got_object_id *ref_id;
203 		int cmp;
204 
205 		if (got_ref_is_symbolic(re->ref))
206 			continue;
207 
208 		name = got_ref_get_name(re->ref);
209 		if (strncmp(name, "refs/", 5) == 0)
210 			name += 5;
211 		if (strncmp(name, "got/", 4) == 0)
212 			continue;
213 		if (strncmp(name, "heads/", 6) == 0)
214 			name += 6;
215 		if (strncmp(name, "remotes/", 8) == 0) {
216 			name += 8;
217 			if (strstr(name, "/" GOT_REF_HEAD) != NULL)
218 				continue;
219 		}
220 		error = got_ref_resolve(&ref_id, t->repo, re->ref);
221 		if (error)
222 			return error;
223 		if (strncmp(name, "tags/", 5) == 0) {
224 			error = got_object_open_as_tag(&tag, t->repo, ref_id);
225 			if (error) {
226 				if (error->code != GOT_ERR_OBJ_TYPE) {
227 					free(ref_id);
228 					continue;
229 				}
230 				/*
231 				 * Ref points at something other
232 				 * than a tag.
233 				 */
234 				error = NULL;
235 				tag = NULL;
236 			}
237 		}
238 		cmp = got_object_id_cmp(tag ?
239 		    got_object_tag_get_object_id(tag) : ref_id, id);
240 		free(ref_id);
241 		if (tag)
242 			got_object_tag_close(tag);
243 		if (cmp != 0)
244 			continue;
245 		s = repo_commit->refs_str;
246 		if (asprintf(&repo_commit->refs_str, "%s%s%s", s ? s : "",
247 		    s ? ", " : "", name) == -1) {
248 			error = got_error_from_errno("asprintf");
249 			free(s);
250 			repo_commit->refs_str = NULL;
251 			return error;
252 		}
253 		free(s);
254 	}
255 
256 	error = got_object_id_str(&repo_commit->commit_id, id);
257 	if (error)
258 		return error;
259 
260 	error = got_object_id_str(&repo_commit->tree_id,
261 	    got_object_commit_get_tree_id(commit));
262 	if (error)
263 		return error;
264 
265 	if (qs->action == DIFF) {
266 		parent_id = STAILQ_FIRST(
267 		    got_object_commit_get_parent_ids(commit));
268 		if (parent_id != NULL) {
269 			id2 = got_object_id_dup(&parent_id->id);
270 			error = got_object_id_str(&repo_commit->parent_id, id2);
271 			if (error)
272 				return error;
273 			free(id2);
274 		} else {
275 			repo_commit->parent_id = strdup("/dev/null");
276 			if (repo_commit->parent_id == NULL) {
277 				error = got_error_from_errno("strdup");
278 				return error;
279 			}
280 		}
281 	}
282 
283 	repo_commit->committer_time =
284 	    got_object_commit_get_committer_time(commit);
285 
286 	repo_commit->author =
287 	    strdup(got_object_commit_get_author(commit));
288 	if (repo_commit->author == NULL) {
289 		error = got_error_from_errno("strdup");
290 		return error;
291 	}
292 	repo_commit->committer =
293 	    strdup(got_object_commit_get_committer(commit));
294 	if (repo_commit->committer == NULL) {
295 		error = got_error_from_errno("strdup");
296 		return error;
297 	}
298 	error = got_object_commit_get_logmsg(&commit_msg0, commit);
299 	if (error)
300 		return error;
301 
302 	commit_msg = commit_msg0;
303 	while (*commit_msg == '\n')
304 		commit_msg++;
305 
306 	repo_commit->commit_msg = strdup(commit_msg);
307 	if (repo_commit->commit_msg == NULL)
308 		error = got_error_from_errno("strdup");
309 	free(commit_msg0);
310 	return error;
311 }
312 
313 const struct got_error *
314 got_get_repo_commits(struct request *c, size_t limit)
315 {
316 	const struct got_error *error = NULL;
317 	struct got_object_id *id = NULL;
318 	struct got_commit_graph *graph = NULL;
319 	struct got_commit_object *commit = NULL;
320 	struct got_reflist_head refs;
321 	struct got_reference *ref = NULL;
322 	struct repo_commit *repo_commit = NULL;
323 	struct server *srv = c->srv;
324 	struct transport *t = c->t;
325 	struct got_repository *repo = t->repo;
326 	struct querystring *qs = t->qs;
327 	struct repo_dir *repo_dir = t->repo_dir;
328 	char *in_repo_path = NULL, *repo_path = NULL, *file_path = NULL;
329 	int chk_next = 0;
330 
331 	if (limit == 0)
332 		return got_error(GOT_ERR_RANGE);
333 
334 	if (limit > 1) {
335 		/*
336 		 * Traverse one commit more than requested to provide
337 		 * the next button.
338 		 */
339 		limit++;
340 		chk_next = 1;
341 	}
342 
343 	TAILQ_INIT(&refs);
344 
345 	if (qs->file != NULL && *qs->file != '\0')
346 		if (asprintf(&file_path, "%s/%s", qs->folder ? qs->folder : "",
347 		    qs->file) == -1)
348 			return got_error_from_errno("asprintf");
349 
350 	if (asprintf(&repo_path, "%s/%s", srv->repos_path,
351 	    repo_dir->name) == -1) {
352 		error = got_error_from_errno("asprintf");
353 		goto done;
354 	}
355 
356 	if (qs->commit) {
357 		error = got_repo_match_object_id_prefix(&id, qs->commit,
358 		    GOT_OBJ_TYPE_COMMIT, repo);
359 		if (error)
360 			goto done;
361 	} else {
362 		error = got_ref_open(&ref, repo, qs->headref, 0);
363 		if (error)
364 			goto done;
365 
366 		error = got_ref_resolve(&id, repo, ref);
367 		if (error)
368 			goto done;
369 	}
370 
371 	error = got_repo_map_path(&in_repo_path, repo, repo_path);
372 	if (error)
373 		goto done;
374 
375 	error = got_ref_list(&refs, repo, NULL, got_ref_cmp_by_name, NULL);
376 	if (error)
377 		goto done;
378 
379 	if (qs->file != NULL && *qs->file != '\0') {
380 		error = got_commit_graph_open(&graph, file_path, 0);
381 		if (error)
382 			goto done;
383 	} else {
384 		error = got_commit_graph_open(&graph, in_repo_path, 0);
385 		if (error)
386 			goto done;
387 	}
388 
389 	error = got_commit_graph_iter_start(graph, id, repo, NULL, NULL);
390 	if (error)
391 		goto done;
392 
393 	for (;;) {
394 		struct got_object_id next_id;
395 
396 		error = got_commit_graph_iter_next(&next_id, graph, repo, NULL,
397 		    NULL);
398 		if (error) {
399 			if (error->code == GOT_ERR_ITER_COMPLETED)
400 				error = NULL;
401 			goto done;
402 		}
403 
404 		error = got_object_open_as_commit(&commit, repo, &next_id);
405 		if (error)
406 			goto done;
407 
408 		error = got_init_repo_commit(&repo_commit);
409 		if (error)
410 			goto done;
411 
412 		error = got_get_repo_commit(c, repo_commit, commit,
413 		    &refs, &next_id);
414 		if (error) {
415 			gotweb_free_repo_commit(repo_commit);
416 			goto done;
417 		}
418 
419 		if (--limit == 0 && chk_next) {
420 			t->more_id = strdup(repo_commit->commit_id);
421 			if (t->more_id == NULL)
422 				error = got_error_from_errno("strdup");
423 			goto done;
424 		}
425 
426 		TAILQ_INSERT_TAIL(&t->repo_commits, repo_commit, entry);
427 
428 		if (limit == 0)
429 			goto done;
430 
431 		if (commit) {
432 			got_object_commit_close(commit);
433 			commit = NULL;
434 		}
435 	}
436  done:
437 	if (ref)
438 		got_ref_close(ref);
439 	if (commit)
440 		got_object_commit_close(commit);
441 	if (graph)
442 		got_commit_graph_close(graph);
443 	got_ref_list_free(&refs);
444 	free(in_repo_path);
445 	free(file_path);
446 	free(repo_path);
447 	free(id);
448 	return error;
449 }
450 
451 const struct got_error *
452 got_get_repo_tags(struct request *c, size_t limit)
453 {
454 	const struct got_error *error = NULL;
455 	struct got_object_id *id = NULL;
456 	struct got_commit_object *commit = NULL;
457 	struct got_reflist_head refs;
458 	struct got_reference *ref;
459 	struct got_reflist_entry *re;
460 	struct server *srv = c->srv;
461 	struct transport *t = c->t;
462 	struct got_repository *repo = t->repo;
463 	struct querystring *qs = t->qs;
464 	struct repo_dir *repo_dir = t->repo_dir;
465 	struct got_tag_object *tag = NULL;
466 	struct repo_tag *rt = NULL, *trt = NULL;
467 	char *in_repo_path = NULL, *repo_path = NULL, *id_str = NULL;
468 	char *tag_commit = NULL, *tag_commit0 = NULL;
469 	char *commit_msg = NULL, *commit_msg0 = NULL;
470 	int chk_next = 0, chk_multi = 1, commit_found = 0, c_cnt = 0;
471 
472 	TAILQ_INIT(&refs);
473 
474 	if (limit == 0)
475 		return got_error(GOT_ERR_RANGE);
476 
477 	if (asprintf(&repo_path, "%s/%s", srv->repos_path,
478 	    repo_dir->name) == -1)
479 		return got_error_from_errno("asprintf");
480 
481 	if (qs->commit == NULL && (qs->action == TAGS || qs->action == RSS)) {
482 		error = got_ref_open(&ref, repo, qs->headref, 0);
483 		if (error)
484 			goto err;
485 		error = got_ref_resolve(&id, repo, ref);
486 		got_ref_close(ref);
487 		if (error)
488 			goto err;
489 	} else if (qs->commit == NULL && qs->action == TAG) {
490 		error = got_error_msg(GOT_ERR_EOF, "commit id missing");
491 		goto err;
492 	} else {
493 		error = got_repo_match_object_id_prefix(&id, qs->commit,
494 		    GOT_OBJ_TYPE_COMMIT, repo);
495 		if (error)
496 			goto err;
497 	}
498 
499 	if (qs->action != SUMMARY && qs->action != TAGS) {
500 		error = got_object_open_as_commit(&commit, repo, id);
501 		if (error)
502 			goto err;
503 		error = got_object_commit_get_logmsg(&commit_msg0, commit);
504 		if (error)
505 			goto err;
506 		if (commit) {
507 			got_object_commit_close(commit);
508 			commit = NULL;
509 		}
510 	}
511 
512 	error = got_repo_map_path(&in_repo_path, repo, repo_path);
513 	if (error)
514 		goto err;
515 
516 	error = got_ref_list(&refs, repo, "refs/tags", got_ref_cmp_tags,
517 	   repo);
518 	if (error)
519 		goto err;
520 
521 	if (limit == 1)
522 		chk_multi = 0;
523 
524 	/*
525 	 * XXX: again, see previous message about caching
526 	 */
527 
528 	TAILQ_FOREACH(re, &refs, entry) {
529 		struct repo_tag *new_repo_tag = NULL;
530 		error = got_init_repo_tag(&new_repo_tag);
531 		if (error)
532 			goto err;
533 
534 		TAILQ_INSERT_TAIL(&t->repo_tags, new_repo_tag, entry);
535 
536 		new_repo_tag->tag_name = strdup(got_ref_get_name(re->ref));
537 		if (new_repo_tag->tag_name == NULL) {
538 			error = got_error_from_errno("strdup");
539 			goto err;
540 		}
541 
542 		free(id);
543 		id = NULL;
544 
545 		free(id_str);
546 		id_str = NULL;
547 
548 		error = got_ref_resolve(&id, repo, re->ref);
549 		if (error)
550 			goto done;
551 
552 		if (tag)
553 			got_object_tag_close(tag);
554 		error = got_object_open_as_tag(&tag, repo, id);
555 		if (error) {
556 			if (error->code != GOT_ERR_OBJ_TYPE)
557 				goto done;
558 			/* "lightweight" tag */
559 			error = got_object_open_as_commit(&commit, repo, id);
560 			if (error)
561 				goto done;
562 			new_repo_tag->tagger =
563 			    strdup(got_object_commit_get_committer(commit));
564 			if (new_repo_tag->tagger == NULL) {
565 				error = got_error_from_errno("strdup");
566 				goto err;
567 			}
568 			new_repo_tag->tagger_time =
569 			    got_object_commit_get_committer_time(commit);
570 			error = got_object_id_str(&id_str, id);
571 			if (error)
572 				goto err;
573 		} else {
574 			new_repo_tag->tagger =
575 			    strdup(got_object_tag_get_tagger(tag));
576 			if (new_repo_tag->tagger == NULL) {
577 				error = got_error_from_errno("strdup");
578 				goto err;
579 			}
580 			new_repo_tag->tagger_time =
581 			    got_object_tag_get_tagger_time(tag);
582 			error = got_object_id_str(&id_str,
583 			    got_object_tag_get_object_id(tag));
584 			if (error)
585 				goto err;
586 		}
587 
588 		new_repo_tag->commit_id = strdup(id_str);
589 		if (new_repo_tag->commit_id == NULL)
590 			goto err;
591 
592 		if (commit_found == 0 && qs->commit != NULL &&
593 		    strncmp(id_str, qs->commit, strlen(id_str)) != 0)
594 			continue;
595 		else
596 			commit_found = 1;
597 
598 		t->tag_count++;
599 
600 		/*
601 		 * check for one more commit before breaking,
602 		 * so we know whether to navigate through briefs
603 		 * commits and summary
604 		 */
605 		if (chk_next) {
606 			t->next_id = strdup(new_repo_tag->commit_id);
607 			if (t->next_id == NULL) {
608 				error = got_error_from_errno("strdup");
609 				goto err;
610 			}
611 			if (commit) {
612 				got_object_commit_close(commit);
613 				commit = NULL;
614 			}
615 			TAILQ_REMOVE(&t->repo_tags, new_repo_tag, entry);
616 			gotweb_free_repo_tag(new_repo_tag);
617 			goto done;
618 		}
619 
620 		if (commit) {
621 			error = got_object_commit_get_logmsg(&tag_commit0,
622 			    commit);
623 			if (error)
624 				goto err;
625 			got_object_commit_close(commit);
626 			commit = NULL;
627 		} else {
628 			tag_commit0 = strdup(got_object_tag_get_message(tag));
629 			if (tag_commit0 == NULL) {
630 				error = got_error_from_errno("strdup");
631 				goto err;
632 			}
633 		}
634 
635 		tag_commit = tag_commit0;
636 		while (*tag_commit == '\n')
637 			tag_commit++;
638 		new_repo_tag->tag_commit = strdup(tag_commit);
639 		if (new_repo_tag->tag_commit == NULL) {
640 			error = got_error_from_errno("strdup");
641 			free(tag_commit0);
642 			goto err;
643 		}
644 		free(tag_commit0);
645 
646 		if (qs->action != SUMMARY && qs->action != TAGS) {
647 			commit_msg = commit_msg0;
648 			while (*commit_msg == '\n')
649 				commit_msg++;
650 
651 			new_repo_tag->commit_msg = strdup(commit_msg);
652 			if (new_repo_tag->commit_msg == NULL) {
653 				error = got_error_from_errno("strdup");
654 				goto err;
655 			}
656 		}
657 
658 		if (limit && --limit == 0) {
659 			if (chk_multi == 0)
660 				break;
661 			chk_next = 1;
662 		}
663 	}
664 
665  done:
666 	/*
667 	 * we have tailq populated, so find previous commit id
668 	 * for navigation through briefs and commits
669 	 */
670 	if (t->tag_count == 0) {
671 		TAILQ_FOREACH_SAFE(rt, &t->repo_tags, entry, trt) {
672 			TAILQ_REMOVE(&t->repo_tags, rt, entry);
673 			gotweb_free_repo_tag(rt);
674 		}
675 	}
676 	if (t->tag_count > 0 && t->prev_id == NULL && qs->commit != NULL) {
677 		commit_found = 0;
678 		TAILQ_FOREACH_REVERSE(rt, &t->repo_tags, repo_tags_head,
679 		    entry) {
680 			if (commit_found == 0 && rt->commit_id != NULL &&
681 			    strcmp(qs->commit, rt->commit_id) != 0) {
682 				continue;
683 			} else
684 				commit_found = 1;
685 			if (c_cnt == srv->max_commits_display ||
686 			    rt == TAILQ_FIRST(&t->repo_tags)) {
687 				t->prev_id = strdup(rt->commit_id);
688 				if (t->prev_id == NULL)
689 					error = got_error_from_errno("strdup");
690 				break;
691 			}
692 			c_cnt++;
693 		}
694 	}
695  err:
696 	if (commit)
697 		got_object_commit_close(commit);
698 	if (tag)
699 		got_object_tag_close(tag);
700 	got_ref_list_free(&refs);
701 	free(commit_msg0);
702 	free(in_repo_path);
703 	free(repo_path);
704 	free(id);
705 	free(id_str);
706 	return error;
707 }
708 
709 int
710 got_output_repo_tree(struct request *c,
711     int (*cb)(struct template *, struct got_tree_entry *))
712 {
713 	const struct got_error *error = NULL;
714 	struct transport *t = c->t;
715 	struct got_commit_object *commit = NULL;
716 	struct got_repository *repo = t->repo;
717 	struct querystring *qs = t->qs;
718 	struct repo_commit *rc = NULL;
719 	struct got_object_id *tree_id = NULL, *commit_id = NULL;
720 	struct got_reflist_head refs;
721 	struct got_tree_object *tree = NULL;
722 	struct got_tree_entry *te;
723 	struct repo_dir *repo_dir = t->repo_dir;
724 	char *escaped_name = NULL, *path = NULL;
725 	int nentries, i;
726 
727 	TAILQ_INIT(&refs);
728 
729 	rc = TAILQ_FIRST(&t->repo_commits);
730 
731 	if (qs->folder != NULL) {
732 		path = strdup(qs->folder);
733 		if (path == NULL) {
734 			error = got_error_from_errno("strdup");
735 			goto done;
736 		}
737 	} else {
738 		error = got_repo_map_path(&path, repo, repo_dir->path);
739 		if (error)
740 			goto done;
741 	}
742 
743 	error = got_repo_match_object_id(&commit_id, NULL, rc->commit_id,
744 	    GOT_OBJ_TYPE_COMMIT, &refs, repo);
745 	if (error)
746 		goto done;
747 
748 	error = got_object_open_as_commit(&commit, repo, commit_id);
749 	if (error)
750 		goto done;
751 
752 	error = got_object_id_by_path(&tree_id, repo, commit, path);
753 	if (error)
754 		goto done;
755 
756 	error = got_object_open_as_tree(&tree, repo, tree_id);
757 	if (error)
758 		goto done;
759 
760 	nentries = got_object_tree_get_nentries(tree);
761 
762 	for (i = 0; i < nentries; i++) {
763 		te = got_object_tree_get_entry(tree, i);
764 		if (cb(c->tp, te) == -1) {
765 			error = got_error(GOT_ERR_CANCELLED);
766 			break;
767 		}
768 	}
769  done:
770 	free(escaped_name);
771 	free(path);
772 	got_ref_list_free(&refs);
773 	if (commit)
774 		got_object_commit_close(commit);
775 	if (tree)
776 		got_object_tree_close(tree);
777 	free(commit_id);
778 	free(tree_id);
779 	if (error) {
780 		if (error->code != GOT_ERR_CANCELLED)
781 			log_warnx("%s: %s", __func__, error->msg);
782 		return -1;
783 	}
784 	return 0;
785 }
786 
787 const struct got_error *
788 got_open_blob_for_output(struct got_blob_object **blob, int *fd,
789     int *binary, struct request *c)
790 {
791 	const struct got_error *error = NULL;
792 	struct transport *t = c->t;
793 	struct got_repository *repo = t->repo;
794 	struct querystring *qs = c->t->qs;
795 	struct got_commit_object *commit = NULL;
796 	struct got_object_id *commit_id = NULL;
797 	struct got_reflist_head refs;
798 	char *path = NULL, *in_repo_path = NULL;
799 	int obj_type;
800 
801 	TAILQ_INIT(&refs);
802 
803 	*blob = NULL;
804 	*fd = -1;
805 	*binary = 0;
806 
807 	if (asprintf(&path, "%s%s%s", qs->folder ? qs->folder : "",
808 	    qs->folder ? "/" : "", qs->file) == -1) {
809 		error = got_error_from_errno("asprintf");
810 		goto done;
811 	}
812 
813 	error = got_repo_map_path(&in_repo_path, repo, path);
814 	if (error)
815 		goto done;
816 
817 	error = got_repo_match_object_id(&commit_id, NULL, qs->commit,
818 	    GOT_OBJ_TYPE_COMMIT, &refs, repo);
819 	if (error)
820 		goto done;
821 
822 	error = got_object_open_as_commit(&commit, repo, commit_id);
823 	if (error)
824 		goto done;
825 
826 	error = got_object_id_by_path(&commit_id, repo, commit, in_repo_path);
827 	if (error)
828 		goto done;
829 
830 	if (commit_id == NULL) {
831 		error = got_error(GOT_ERR_NO_OBJ);
832 		goto done;
833 	}
834 
835 	error = got_object_get_type(&obj_type, repo, commit_id);
836 	if (error)
837 		goto done;
838 
839 	if (obj_type != GOT_OBJ_TYPE_BLOB) {
840 		error = got_error(GOT_ERR_OBJ_TYPE);
841 		goto done;
842 	}
843 
844 	error = got_gotweb_dupfd(&c->priv_fd[BLOB_FD_1], fd);
845 	if (error)
846 		goto done;
847 
848 	error = got_object_open_as_blob(blob, repo, commit_id, BUF, *fd);
849 	if (error)
850 		goto done;
851 
852 	error = got_object_blob_is_binary(binary, *blob);
853 	if (error)
854 		goto done;
855 
856  done:
857 	if (commit)
858 		got_object_commit_close(commit);
859 
860 	if (error) {
861 		if (*fd != -1)
862 			close(*fd);
863 		if (*blob)
864 			got_object_blob_close(*blob);
865 		*fd = -1;
866 		*blob = NULL;
867 	}
868 
869 	free(in_repo_path);
870 	free(commit_id);
871 	free(path);
872 	return error;
873 }
874 
875 int
876 got_output_blob_by_lines(struct template *tp, struct got_blob_object *blob,
877     int (*cb)(struct template *, const char *, size_t))
878 {
879 	const struct got_error	*err;
880 	char			*line = NULL;
881 	size_t			 linesize = 0;
882 	size_t			 lineno = 0;
883 	ssize_t			 linelen = 0;
884 
885 	for (;;) {
886 		err = got_object_blob_getline(&line, &linelen, &linesize,
887 		    blob);
888 		if (err || linelen == -1)
889 			break;
890 		lineno++;
891 		if (cb(tp, line, lineno) == -1) {
892 			err = got_error(GOT_ERR_CANCELLED);
893 			break;
894 		}
895 	}
896 
897 	free(line);
898 
899 	if (err) {
900 		if (err->code != GOT_ERR_CANCELLED)
901 			log_warnx("%s: got_object_blob_getline failed: %s",
902 			    __func__, err->msg);
903 		return -1;
904 	}
905 	return 0;
906 }
907 
908 struct blame_cb_args {
909 	struct blame_line *lines;
910 	int nlines;
911 	int nlines_prec;
912 	int lineno_cur;
913 	off_t *line_offsets;
914 	FILE *f;
915 	struct got_repository *repo;
916 	struct request *c;
917 	got_render_blame_line_cb cb;
918 };
919 
920 static const struct got_error *
921 got_gotweb_blame_cb(void *arg, int nlines, int lineno,
922     struct got_commit_object *commit, struct got_object_id *id)
923 {
924 	const struct got_error *err = NULL;
925 	struct blame_cb_args *a = arg;
926 	struct blame_line *bline;
927 	struct request *c = a->c;
928 	char *line = NULL;
929 	size_t linesize = 0;
930 	off_t offset;
931 	struct tm tm;
932 	time_t committer_time;
933 
934 	if (nlines != a->nlines ||
935 	    (lineno != -1 && lineno < 1) || lineno > a->nlines)
936 		return got_error(GOT_ERR_RANGE);
937 
938 	if (lineno == -1)
939 		return NULL; /* no change in this commit */
940 
941 	/* Annotate this line. */
942 	bline = &a->lines[lineno - 1];
943 	if (bline->annotated)
944 		return NULL;
945 	err = got_object_id_str(&bline->id_str, id);
946 	if (err)
947 		return err;
948 
949 	bline->committer = strdup(got_object_commit_get_committer(commit));
950 	if (bline->committer == NULL) {
951 		err = got_error_from_errno("strdup");
952 		goto done;
953 	}
954 
955 	committer_time = got_object_commit_get_committer_time(commit);
956 	if (gmtime_r(&committer_time, &tm) == NULL)
957 		return got_error_from_errno("gmtime_r");
958 	if (strftime(bline->datebuf, sizeof(bline->datebuf), "%G-%m-%d",
959 	    &tm) == 0) {
960 		err = got_error(GOT_ERR_NO_SPACE);
961 		goto done;
962 	}
963 	bline->annotated = 1;
964 
965 	/* Print lines annotated so far. */
966 	bline = &a->lines[a->lineno_cur - 1];
967 	if (!bline->annotated)
968 		goto done;
969 
970 	offset = a->line_offsets[a->lineno_cur - 1];
971 	if (fseeko(a->f, offset, SEEK_SET) == -1) {
972 		err = got_error_from_errno("fseeko");
973 		goto done;
974 	}
975 
976 	while (a->lineno_cur <= a->nlines && bline->annotated) {
977 		if (getline(&line, &linesize, a->f) == -1) {
978 			if (ferror(a->f))
979 				err = got_error_from_errno("getline");
980 			break;
981 		}
982 
983 		if (a->cb(c->tp, line, bline, a->nlines_prec,
984 		    a->lineno_cur) == -1) {
985 			err = got_error(GOT_ERR_CANCELLED);
986 			break;
987 		}
988 
989 		a->lineno_cur++;
990 		bline = &a->lines[a->lineno_cur - 1];
991 	}
992  done:
993 	free(line);
994 	return err;
995 }
996 
997 const struct got_error *
998 got_output_file_blame(struct request *c, got_render_blame_line_cb cb)
999 {
1000 	const struct got_error *error = NULL;
1001 	struct transport *t = c->t;
1002 	struct got_repository *repo = t->repo;
1003 	struct querystring *qs = c->t->qs;
1004 	struct got_object_id *obj_id = NULL, *commit_id = NULL;
1005 	struct got_commit_object *commit = NULL;
1006 	struct got_reflist_head refs;
1007 	struct got_blob_object *blob = NULL;
1008 	char *path = NULL, *in_repo_path = NULL;
1009 	struct blame_cb_args bca;
1010 	int i, obj_type, blobfd = -1, fd1 = -1, fd2 = -1;
1011 	off_t filesize;
1012 	FILE *f1 = NULL, *f2 = NULL;
1013 
1014 	TAILQ_INIT(&refs);
1015 	bca.f = NULL;
1016 	bca.lines = NULL;
1017 	bca.cb = cb;
1018 
1019 	if (asprintf(&path, "%s%s%s", qs->folder ? qs->folder : "",
1020 	    qs->folder ? "/" : "", qs->file) == -1) {
1021 		error = got_error_from_errno("asprintf");
1022 		goto done;
1023 	}
1024 
1025 	error = got_repo_map_path(&in_repo_path, repo, path);
1026 	if (error)
1027 		goto done;
1028 
1029 	error = got_repo_match_object_id(&commit_id, NULL, qs->commit,
1030 	    GOT_OBJ_TYPE_COMMIT, &refs, repo);
1031 	if (error)
1032 		goto done;
1033 
1034 	error = got_object_open_as_commit(&commit, repo, commit_id);
1035 	if (error)
1036 		goto done;
1037 
1038 	error = got_object_id_by_path(&obj_id, repo, commit, in_repo_path);
1039 	if (error)
1040 		goto done;
1041 
1042 	error = got_object_get_type(&obj_type, repo, obj_id);
1043 	if (error)
1044 		goto done;
1045 
1046 	if (obj_type != GOT_OBJ_TYPE_BLOB) {
1047 		error = got_error(GOT_ERR_OBJ_TYPE);
1048 		goto done;
1049 	}
1050 
1051 	error = got_gotweb_openfile(&bca.f, &c->priv_fd[BLAME_FD_1]);
1052 	if (error)
1053 		goto done;
1054 
1055 	error = got_gotweb_dupfd(&c->priv_fd[BLAME_FD_2], &blobfd);
1056 	if (error)
1057 		goto done;
1058 
1059 	error = got_object_open_as_blob(&blob, repo, obj_id, BUF, blobfd);
1060 	if (error)
1061 		goto done;
1062 
1063 	error = got_object_blob_dump_to_file(&filesize, &bca.nlines,
1064 	    &bca.line_offsets, bca.f, blob);
1065 	if (error || bca.nlines == 0)
1066 		goto done;
1067 
1068 	/* Don't include \n at EOF in the blame line count. */
1069 	if (bca.line_offsets[bca.nlines - 1] == filesize)
1070 		bca.nlines--;
1071 
1072 	bca.lines = calloc(bca.nlines, sizeof(*bca.lines));
1073 	if (bca.lines == NULL) {
1074 		error = got_error_from_errno("calloc");
1075 		goto done;
1076 	}
1077 	bca.lineno_cur = 1;
1078 	bca.nlines_prec = 0;
1079 	i = bca.nlines;
1080 	while (i > 0) {
1081 		i /= 10;
1082 		bca.nlines_prec++;
1083 	}
1084 	bca.repo = repo;
1085 	bca.c = c;
1086 
1087 	error = got_gotweb_dupfd(&c->priv_fd[BLAME_FD_3], &fd1);
1088 	if (error)
1089 		goto done;
1090 
1091 	error = got_gotweb_dupfd(&c->priv_fd[BLAME_FD_4], &fd2);
1092 	if (error)
1093 		goto done;
1094 
1095 	error = got_gotweb_openfile(&f1, &c->priv_fd[BLAME_FD_5]);
1096 	if (error)
1097 		goto done;
1098 
1099 	error = got_gotweb_openfile(&f2, &c->priv_fd[BLAME_FD_6]);
1100 	if (error)
1101 		goto done;
1102 
1103 	error = got_blame(in_repo_path, commit_id, repo,
1104 	    GOT_DIFF_ALGORITHM_MYERS, got_gotweb_blame_cb, &bca, NULL, NULL,
1105 	    fd1, fd2, f1, f2);
1106 
1107  done:
1108 	if (bca.lines) {
1109 		free(bca.line_offsets);
1110 		for (i = 0; i < bca.nlines; i++) {
1111 			struct blame_line *bline = &bca.lines[i];
1112 			free(bline->id_str);
1113 			free(bline->committer);
1114 		}
1115 	}
1116 	free(bca.lines);
1117 	if (blobfd != -1 && close(blobfd) == -1 && error == NULL)
1118 		error = got_error_from_errno("close");
1119 	if (fd1 != -1 && close(fd1) == -1 && error == NULL)
1120 		error = got_error_from_errno("close");
1121 	if (fd2 != -1 && close(fd2) == -1 && error == NULL)
1122 		error = got_error_from_errno("close");
1123 	if (bca.f) {
1124 		const struct got_error *bca_err = got_gotweb_closefile(bca.f);
1125 		if (error == NULL)
1126 			error = bca_err;
1127 	}
1128 	if (f1) {
1129 		const struct got_error *f1_err = got_gotweb_closefile(f1);
1130 		if (error == NULL)
1131 			error = f1_err;
1132 	}
1133 	if (f2) {
1134 		const struct got_error *f2_err = got_gotweb_closefile(f2);
1135 		if (error == NULL)
1136 			error = f2_err;
1137 	}
1138 	if (commit)
1139 		got_object_commit_close(commit);
1140 	if (blob)
1141 		got_object_blob_close(blob);
1142 	free(in_repo_path);
1143 	free(commit_id);
1144 	free(obj_id);
1145 	free(path);
1146 	got_ref_list_free(&refs);
1147 	return error;
1148 }
1149 
1150 const struct got_error *
1151 got_open_diff_for_output(FILE **fp, struct request *c)
1152 {
1153 	const struct got_error *error = NULL;
1154 	struct transport *t = c->t;
1155 	struct got_repository *repo = t->repo;
1156 	struct repo_commit *rc = NULL;
1157 	struct got_object_id *id1 = NULL, *id2 = NULL;
1158 	struct got_reflist_head refs;
1159 	FILE *f1 = NULL, *f2 = NULL, *f3 = NULL;
1160 	int obj_type, fd1 = -1, fd2 = -1;
1161 
1162 	*fp = NULL;
1163 
1164 	TAILQ_INIT(&refs);
1165 
1166 	error = got_gotweb_openfile(&f1, &c->priv_fd[DIFF_FD_1]);
1167 	if (error)
1168 		return error;
1169 
1170 	error = got_gotweb_openfile(&f2, &c->priv_fd[DIFF_FD_2]);
1171 	if (error)
1172 		return error;
1173 
1174 	error = got_gotweb_openfile(&f3, &c->priv_fd[DIFF_FD_3]);
1175 	if (error)
1176 		return error;
1177 
1178 	rc = TAILQ_FIRST(&t->repo_commits);
1179 
1180 	if (rc->parent_id != NULL &&
1181 	    strncmp(rc->parent_id, "/dev/null", 9) != 0) {
1182 		error = got_repo_match_object_id(&id1, NULL,
1183 		    rc->parent_id, GOT_OBJ_TYPE_ANY,
1184 		    &refs, repo);
1185 		if (error)
1186 			goto done;
1187 	}
1188 
1189 	error = got_repo_match_object_id(&id2, NULL, rc->commit_id,
1190 	    GOT_OBJ_TYPE_ANY, &refs, repo);
1191 	if (error)
1192 		goto done;
1193 
1194 	error = got_object_get_type(&obj_type, repo, id2);
1195 	if (error)
1196 		goto done;
1197 
1198 	error = got_gotweb_dupfd(&c->priv_fd[DIFF_FD_4], &fd1);
1199 	if (error)
1200 		goto done;
1201 
1202 	error = got_gotweb_dupfd(&c->priv_fd[DIFF_FD_5], &fd2);
1203 	if (error)
1204 		goto done;
1205 
1206 	switch (obj_type) {
1207 	case GOT_OBJ_TYPE_BLOB:
1208 		error = got_diff_objects_as_blobs(NULL, NULL, f1, f2, fd1, fd2,
1209 		     id1, id2, NULL, NULL, GOT_DIFF_ALGORITHM_MYERS, 3, 0, 0,
1210 		     NULL, repo, f3);
1211 		break;
1212 	case GOT_OBJ_TYPE_TREE:
1213 		error = got_diff_objects_as_trees(NULL, NULL, f1, f2, fd1, fd2,
1214 		    id1, id2, NULL, "", "",  GOT_DIFF_ALGORITHM_MYERS, 3, 0, 0,
1215 		    NULL, repo, f3);
1216 		break;
1217 	case GOT_OBJ_TYPE_COMMIT:
1218 		error = got_diff_objects_as_commits(NULL, NULL, f1, f2, fd1,
1219 		    fd2, id1, id2, NULL,  GOT_DIFF_ALGORITHM_MYERS, 3, 0, 0,
1220 		    NULL, repo, f3);
1221 		break;
1222 	default:
1223 		error = got_error(GOT_ERR_OBJ_TYPE);
1224 	}
1225 	if (error)
1226 		goto done;
1227 
1228 	if (fseek(f3, 0, SEEK_SET) == -1) {
1229 		error = got_ferror(f3, GOT_ERR_IO);
1230 		goto done;
1231 	}
1232 
1233 	*fp = f3;
1234 
1235  done:
1236 	if (fd1 != -1 && close(fd1) == -1 && error == NULL)
1237 		error = got_error_from_errno("close");
1238 	if (fd2 != -1 && close(fd2) == -1 && error == NULL)
1239 		error = got_error_from_errno("close");
1240 	if (f1) {
1241 		const struct got_error *f1_err = got_gotweb_closefile(f1);
1242 		if (error == NULL)
1243 			error = f1_err;
1244 	}
1245 	if (f2) {
1246 		const struct got_error *f2_err = got_gotweb_closefile(f2);
1247 		if (error == NULL)
1248 			error = f2_err;
1249 	}
1250 	if (error && f3) {
1251 		got_gotweb_closefile(f3);
1252 		*fp = NULL;
1253 	}
1254 	got_ref_list_free(&refs);
1255 	free(id1);
1256 	free(id2);
1257 	return error;
1258 }
1259 
1260 static const struct got_error *
1261 got_init_repo_commit(struct repo_commit **rc)
1262 {
1263 	*rc = calloc(1, sizeof(**rc));
1264 	if (*rc == NULL)
1265 		return got_error_from_errno2(__func__, "calloc");
1266 
1267 	(*rc)->path = NULL;
1268 	(*rc)->refs_str = NULL;
1269 	(*rc)->commit_id = NULL;
1270 	(*rc)->committer = NULL;
1271 	(*rc)->author = NULL;
1272 	(*rc)->parent_id = NULL;
1273 	(*rc)->tree_id = NULL;
1274 	(*rc)->commit_msg = NULL;
1275 
1276 	return NULL;
1277 }
1278 
1279 static const struct got_error *
1280 got_init_repo_tag(struct repo_tag **rt)
1281 {
1282 	*rt = calloc(1, sizeof(**rt));
1283 	if (*rt == NULL)
1284 		return got_error_from_errno2(__func__, "calloc");
1285 
1286 	(*rt)->commit_id = NULL;
1287 	(*rt)->tag_name = NULL;
1288 	(*rt)->tag_commit = NULL;
1289 	(*rt)->commit_msg = NULL;
1290 	(*rt)->tagger = NULL;
1291 
1292 	return NULL;
1293 }