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Date:: Fri Aug 11 10:26:50 2023 UTC
Message:: gotwebd: fix branches modification time with show_repo_age off If show_repo_age is set to off, got_get_repo_age() returns without setting the timestamp. got_get_repo_age() is also used by the branch listing to show how old they are however, and we end up rendering the stack garbage. Instead, respect `show_repo_age off' one layer above, and always return a timestamp in got_get_repo_age(). While here, initialize the timestamp to zero so it's set also in case of failures. Issue reported on IRC by xs, thanks!
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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 <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 transport *t = c->t;
132 	struct got_repository *repo = t->repo;
133 	struct got_commit_object *commit = NULL;
134 	struct got_reflist_head refs;
135 	struct got_reflist_entry *re;
136 	time_t committer_time = 0, cmp_time = 0;
137 
138 	TAILQ_INIT(&refs);
139 
140 	*repo_age = 0;
141 
142 	error = got_ref_list(&refs, repo, "refs/heads",
143 	    got_ref_cmp_by_name, NULL);
144 	if (error)
145 		goto done;
146 
147 	/*
148 	 * Find the youngest branch tip in the repository, or the age of
149 	 * the a specific branch tip if a name was provided by the caller.
150 	 */
151 	TAILQ_FOREACH(re, &refs, entry) {
152 		struct got_object_id *id = NULL;
153 
154 		if (refname && strcmp(got_ref_get_name(re->ref), refname) != 0)
155 			continue;
156 
157 		error = got_ref_resolve(&id, repo, re->ref);
158 		if (error)
159 			goto done;
160 
161 		error = got_object_open_as_commit(&commit, repo, id);
162 		free(id);
163 		if (error)
164 			goto done;
165 
166 		committer_time =
167 		    got_object_commit_get_committer_time(commit);
168 		got_object_commit_close(commit);
169 		if (cmp_time < committer_time)
170 			cmp_time = committer_time;
171 
172 		if (refname)
173 			break;
174 	}
175 
176 	if (cmp_time != 0)
177 		*repo_age = cmp_time;
178  done:
179 	got_ref_list_free(&refs);
180 	return error;
181 }
182 
183 static const struct got_error *
184 got_get_repo_commit(struct request *c, struct repo_commit *repo_commit,
185     struct got_commit_object *commit, struct got_reflist_head *refs,
186     struct got_object_id *id)
187 {
188 	const struct got_error *error = NULL;
189 	struct got_reflist_entry *re;
190 	struct got_object_id *id2 = NULL;
191 	struct got_object_qid *parent_id;
192 	struct transport *t = c->t;
193 	struct querystring *qs = c->t->qs;
194 	char *commit_msg = NULL, *commit_msg0;
195 
196 	TAILQ_FOREACH(re, refs, entry) {
197 		char *s;
198 		const char *name;
199 		struct got_tag_object *tag = NULL;
200 		struct got_object_id *ref_id;
201 		int cmp;
202 
203 		if (got_ref_is_symbolic(re->ref))
204 			continue;
205 
206 		name = got_ref_get_name(re->ref);
207 		if (strncmp(name, "refs/", 5) == 0)
208 			name += 5;
209 		if (strncmp(name, "got/", 4) == 0)
210 			continue;
211 		if (strncmp(name, "heads/", 6) == 0)
212 			name += 6;
213 		if (strncmp(name, "remotes/", 8) == 0) {
214 			name += 8;
215 			if (strstr(name, "/" GOT_REF_HEAD) != NULL)
216 				continue;
217 		}
218 		error = got_ref_resolve(&ref_id, t->repo, re->ref);
219 		if (error)
220 			return error;
221 		if (strncmp(name, "tags/", 5) == 0) {
222 			error = got_object_open_as_tag(&tag, t->repo, ref_id);
223 			if (error) {
224 				if (error->code != GOT_ERR_OBJ_TYPE) {
225 					free(ref_id);
226 					continue;
227 				}
228 				/*
229 				 * Ref points at something other
230 				 * than a tag.
231 				 */
232 				error = NULL;
233 				tag = NULL;
234 			}
235 		}
236 		cmp = got_object_id_cmp(tag ?
237 		    got_object_tag_get_object_id(tag) : ref_id, id);
238 		free(ref_id);
239 		if (tag)
240 			got_object_tag_close(tag);
241 		if (cmp != 0)
242 			continue;
243 		s = repo_commit->refs_str;
244 		if (asprintf(&repo_commit->refs_str, "%s%s%s", s ? s : "",
245 		    s ? ", " : "", name) == -1) {
246 			error = got_error_from_errno("asprintf");
247 			free(s);
248 			repo_commit->refs_str = NULL;
249 			return error;
250 		}
251 		free(s);
252 	}
253 
254 	error = got_object_id_str(&repo_commit->commit_id, id);
255 	if (error)
256 		return error;
257 
258 	error = got_object_id_str(&repo_commit->tree_id,
259 	    got_object_commit_get_tree_id(commit));
260 	if (error)
261 		return error;
262 
263 	if (qs->action == DIFF) {
264 		parent_id = STAILQ_FIRST(
265 		    got_object_commit_get_parent_ids(commit));
266 		if (parent_id != NULL) {
267 			id2 = got_object_id_dup(&parent_id->id);
268 			error = got_object_id_str(&repo_commit->parent_id, id2);
269 			if (error)
270 				return error;
271 			free(id2);
272 		} else {
273 			repo_commit->parent_id = strdup("/dev/null");
274 			if (repo_commit->parent_id == NULL) {
275 				error = got_error_from_errno("strdup");
276 				return error;
277 			}
278 		}
279 	}
280 
281 	repo_commit->committer_time =
282 	    got_object_commit_get_committer_time(commit);
283 
284 	repo_commit->author =
285 	    strdup(got_object_commit_get_author(commit));
286 	if (repo_commit->author == NULL) {
287 		error = got_error_from_errno("strdup");
288 		return error;
289 	}
290 	repo_commit->committer =
291 	    strdup(got_object_commit_get_committer(commit));
292 	if (repo_commit->committer == NULL) {
293 		error = got_error_from_errno("strdup");
294 		return error;
295 	}
296 	error = got_object_commit_get_logmsg(&commit_msg0, commit);
297 	if (error)
298 		return error;
299 
300 	commit_msg = commit_msg0;
301 	while (*commit_msg == '\n')
302 		commit_msg++;
303 
304 	repo_commit->commit_msg = strdup(commit_msg);
305 	if (repo_commit->commit_msg == NULL)
306 		error = got_error_from_errno("strdup");
307 	free(commit_msg0);
308 	return error;
309 }
310 
311 const struct got_error *
312 got_get_repo_commits(struct request *c, size_t limit)
313 {
314 	const struct got_error *error = NULL;
315 	struct got_object_id *id = NULL;
316 	struct got_commit_graph *graph = NULL;
317 	struct got_commit_object *commit = NULL;
318 	struct got_reflist_head refs;
319 	struct got_reference *ref = NULL;
320 	struct repo_commit *repo_commit = NULL;
321 	struct server *srv = c->srv;
322 	struct transport *t = c->t;
323 	struct got_repository *repo = t->repo;
324 	struct querystring *qs = t->qs;
325 	struct repo_dir *repo_dir = t->repo_dir;
326 	char *in_repo_path = NULL, *repo_path = NULL, *file_path = NULL;
327 	int chk_next = 0;
328 
329 	if (limit == 0)
330 		return got_error(GOT_ERR_RANGE);
331 
332 	if (limit > 1) {
333 		/*
334 		 * Traverse one commit more than requested to provide
335 		 * the next button.
336 		 */
337 		limit++;
338 		chk_next = 1;
339 	}
340 
341 	TAILQ_INIT(&refs);
342 
343 	if (qs->file != NULL && *qs->file != '\0')
344 		if (asprintf(&file_path, "%s/%s", qs->folder ? qs->folder : "",
345 		    qs->file) == -1)
346 			return got_error_from_errno("asprintf");
347 
348 	if (asprintf(&repo_path, "%s/%s", srv->repos_path,
349 	    repo_dir->name) == -1) {
350 		error = got_error_from_errno("asprintf");
351 		goto done;
352 	}
353 
354 	if (qs->commit) {
355 		error = got_repo_match_object_id_prefix(&id, qs->commit,
356 		    GOT_OBJ_TYPE_COMMIT, repo);
357 		if (error)
358 			goto done;
359 	} else {
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 	}
368 
369 	error = got_repo_map_path(&in_repo_path, repo, repo_path);
370 	if (error)
371 		goto done;
372 
373 	error = got_ref_list(&refs, repo, NULL, got_ref_cmp_by_name, NULL);
374 	if (error)
375 		goto done;
376 
377 	if (qs->file != NULL && *qs->file != '\0') {
378 		error = got_commit_graph_open(&graph, file_path, 0);
379 		if (error)
380 			goto done;
381 	} else {
382 		error = got_commit_graph_open(&graph, in_repo_path, 0);
383 		if (error)
384 			goto done;
385 	}
386 
387 	error = got_commit_graph_iter_start(graph, id, repo, NULL, NULL);
388 	if (error)
389 		goto done;
390 
391 	for (;;) {
392 		struct got_object_id next_id;
393 
394 		error = got_commit_graph_iter_next(&next_id, graph, repo, NULL,
395 		    NULL);
396 		if (error) {
397 			if (error->code == GOT_ERR_ITER_COMPLETED)
398 				error = NULL;
399 			goto done;
400 		}
401 
402 		error = got_object_open_as_commit(&commit, repo, &next_id);
403 		if (error)
404 			goto done;
405 
406 		error = got_init_repo_commit(&repo_commit);
407 		if (error)
408 			goto done;
409 
410 		error = got_get_repo_commit(c, repo_commit, commit,
411 		    &refs, &next_id);
412 		if (error) {
413 			gotweb_free_repo_commit(repo_commit);
414 			goto done;
415 		}
416 
417 		if (--limit == 0 && chk_next) {
418 			t->more_id = strdup(repo_commit->commit_id);
419 			if (t->more_id == NULL)
420 				error = got_error_from_errno("strdup");
421 			goto done;
422 		}
423 
424 		TAILQ_INSERT_TAIL(&t->repo_commits, repo_commit, entry);
425 
426 		if (limit == 0)
427 			goto done;
428 
429 		if (commit) {
430 			got_object_commit_close(commit);
431 			commit = NULL;
432 		}
433 	}
434  done:
435 	if (ref)
436 		got_ref_close(ref);
437 	if (commit)
438 		got_object_commit_close(commit);
439 	if (graph)
440 		got_commit_graph_close(graph);
441 	got_ref_list_free(&refs);
442 	free(in_repo_path);
443 	free(file_path);
444 	free(repo_path);
445 	free(id);
446 	return error;
447 }
448 
449 const struct got_error *
450 got_get_repo_tags(struct request *c, size_t limit)
451 {
452 	const struct got_error *error = NULL;
453 	struct got_object_id *id = NULL;
454 	struct got_commit_object *commit = NULL;
455 	struct got_reflist_head refs;
456 	struct got_reference *ref;
457 	struct got_reflist_entry *re;
458 	struct server *srv = c->srv;
459 	struct transport *t = c->t;
460 	struct got_repository *repo = t->repo;
461 	struct querystring *qs = t->qs;
462 	struct repo_dir *repo_dir = t->repo_dir;
463 	struct got_tag_object *tag = NULL;
464 	struct repo_tag *rt = NULL, *trt = NULL;
465 	char *in_repo_path = NULL, *repo_path = NULL, *id_str = NULL;
466 	char *tag_commit = NULL, *tag_commit0 = NULL;
467 	char *commit_msg = NULL, *commit_msg0 = NULL;
468 	int chk_next = 0, chk_multi = 1, commit_found = 0, c_cnt = 0;
469 
470 	TAILQ_INIT(&refs);
471 
472 	if (limit == 0)
473 		return got_error(GOT_ERR_RANGE);
474 
475 	if (asprintf(&repo_path, "%s/%s", srv->repos_path,
476 	    repo_dir->name) == -1)
477 		return got_error_from_errno("asprintf");
478 
479 	if (qs->commit == NULL && (qs->action == TAGS || qs->action == RSS)) {
480 		error = got_ref_open(&ref, repo, qs->headref, 0);
481 		if (error)
482 			goto err;
483 		error = got_ref_resolve(&id, repo, ref);
484 		got_ref_close(ref);
485 		if (error)
486 			goto err;
487 	} else if (qs->commit == NULL && qs->action == TAG) {
488 		error = got_error_msg(GOT_ERR_EOF, "commit id missing");
489 		goto err;
490 	} else {
491 		error = got_repo_match_object_id_prefix(&id, qs->commit,
492 		    GOT_OBJ_TYPE_COMMIT, repo);
493 		if (error)
494 			goto err;
495 	}
496 
497 	if (qs->action != SUMMARY && qs->action != TAGS) {
498 		error = got_object_open_as_commit(&commit, repo, id);
499 		if (error)
500 			goto err;
501 		error = got_object_commit_get_logmsg(&commit_msg0, commit);
502 		if (error)
503 			goto err;
504 		if (commit) {
505 			got_object_commit_close(commit);
506 			commit = NULL;
507 		}
508 	}
509 
510 	error = got_repo_map_path(&in_repo_path, repo, repo_path);
511 	if (error)
512 		goto err;
513 
514 	error = got_ref_list(&refs, repo, "refs/tags", got_ref_cmp_tags,
515 	   repo);
516 	if (error)
517 		goto err;
518 
519 	if (limit == 1)
520 		chk_multi = 0;
521 
522 	/*
523 	 * XXX: again, see previous message about caching
524 	 */
525 
526 	TAILQ_FOREACH(re, &refs, entry) {
527 		struct repo_tag *new_repo_tag = NULL;
528 		error = got_init_repo_tag(&new_repo_tag);
529 		if (error)
530 			goto err;
531 
532 		TAILQ_INSERT_TAIL(&t->repo_tags, new_repo_tag, entry);
533 
534 		new_repo_tag->tag_name = strdup(got_ref_get_name(re->ref));
535 		if (new_repo_tag->tag_name == NULL) {
536 			error = got_error_from_errno("strdup");
537 			goto err;
538 		}
539 
540 		free(id);
541 		id = NULL;
542 
543 		free(id_str);
544 		id_str = NULL;
545 
546 		error = got_ref_resolve(&id, repo, re->ref);
547 		if (error)
548 			goto done;
549 
550 		if (tag)
551 			got_object_tag_close(tag);
552 		error = got_object_open_as_tag(&tag, repo, id);
553 		if (error) {
554 			if (error->code != GOT_ERR_OBJ_TYPE)
555 				goto done;
556 			/* "lightweight" tag */
557 			error = got_object_open_as_commit(&commit, repo, id);
558 			if (error)
559 				goto done;
560 			new_repo_tag->tagger =
561 			    strdup(got_object_commit_get_committer(commit));
562 			if (new_repo_tag->tagger == NULL) {
563 				error = got_error_from_errno("strdup");
564 				goto err;
565 			}
566 			new_repo_tag->tagger_time =
567 			    got_object_commit_get_committer_time(commit);
568 			error = got_object_id_str(&id_str, id);
569 			if (error)
570 				goto err;
571 		} else {
572 			new_repo_tag->tagger =
573 			    strdup(got_object_tag_get_tagger(tag));
574 			if (new_repo_tag->tagger == NULL) {
575 				error = got_error_from_errno("strdup");
576 				goto err;
577 			}
578 			new_repo_tag->tagger_time =
579 			    got_object_tag_get_tagger_time(tag);
580 			error = got_object_id_str(&id_str,
581 			    got_object_tag_get_object_id(tag));
582 			if (error)
583 				goto err;
584 		}
585 
586 		new_repo_tag->commit_id = strdup(id_str);
587 		if (new_repo_tag->commit_id == NULL)
588 			goto err;
589 
590 		if (commit_found == 0 && qs->commit != NULL &&
591 		    strncmp(id_str, qs->commit, strlen(id_str)) != 0)
592 			continue;
593 		else
594 			commit_found = 1;
595 
596 		t->tag_count++;
597 
598 		/*
599 		 * check for one more commit before breaking,
600 		 * so we know whether to navigate through briefs
601 		 * commits and summary
602 		 */
603 		if (chk_next) {
604 			t->next_id = strdup(new_repo_tag->commit_id);
605 			if (t->next_id == NULL) {
606 				error = got_error_from_errno("strdup");
607 				goto err;
608 			}
609 			if (commit) {
610 				got_object_commit_close(commit);
611 				commit = NULL;
612 			}
613 			TAILQ_REMOVE(&t->repo_tags, new_repo_tag, entry);
614 			gotweb_free_repo_tag(new_repo_tag);
615 			goto done;
616 		}
617 
618 		if (commit) {
619 			error = got_object_commit_get_logmsg(&tag_commit0,
620 			    commit);
621 			if (error)
622 				goto err;
623 			got_object_commit_close(commit);
624 			commit = NULL;
625 		} else {
626 			tag_commit0 = strdup(got_object_tag_get_message(tag));
627 			if (tag_commit0 == NULL) {
628 				error = got_error_from_errno("strdup");
629 				goto err;
630 			}
631 		}
632 
633 		tag_commit = tag_commit0;
634 		while (*tag_commit == '\n')
635 			tag_commit++;
636 		new_repo_tag->tag_commit = strdup(tag_commit);
637 		if (new_repo_tag->tag_commit == NULL) {
638 			error = got_error_from_errno("strdup");
639 			free(tag_commit0);
640 			goto err;
641 		}
642 		free(tag_commit0);
643 
644 		if (qs->action != SUMMARY && qs->action != TAGS) {
645 			commit_msg = commit_msg0;
646 			while (*commit_msg == '\n')
647 				commit_msg++;
648 
649 			new_repo_tag->commit_msg = strdup(commit_msg);
650 			if (new_repo_tag->commit_msg == NULL) {
651 				error = got_error_from_errno("strdup");
652 				goto err;
653 			}
654 		}
655 
656 		if (limit && --limit == 0) {
657 			if (chk_multi == 0)
658 				break;
659 			chk_next = 1;
660 		}
661 	}
662 
663  done:
664 	/*
665 	 * we have tailq populated, so find previous commit id
666 	 * for navigation through briefs and commits
667 	 */
668 	if (t->tag_count == 0) {
669 		TAILQ_FOREACH_SAFE(rt, &t->repo_tags, entry, trt) {
670 			TAILQ_REMOVE(&t->repo_tags, rt, entry);
671 			gotweb_free_repo_tag(rt);
672 		}
673 	}
674 	if (t->tag_count > 0 && t->prev_id == NULL && qs->commit != NULL) {
675 		commit_found = 0;
676 		TAILQ_FOREACH_REVERSE(rt, &t->repo_tags, repo_tags_head,
677 		    entry) {
678 			if (commit_found == 0 && rt->commit_id != NULL &&
679 			    strcmp(qs->commit, rt->commit_id) != 0) {
680 				continue;
681 			} else
682 				commit_found = 1;
683 			if (c_cnt == srv->max_commits_display ||
684 			    rt == TAILQ_FIRST(&t->repo_tags)) {
685 				t->prev_id = strdup(rt->commit_id);
686 				if (t->prev_id == NULL)
687 					error = got_error_from_errno("strdup");
688 				break;
689 			}
690 			c_cnt++;
691 		}
692 	}
693  err:
694 	if (commit)
695 		got_object_commit_close(commit);
696 	if (tag)
697 		got_object_tag_close(tag);
698 	got_ref_list_free(&refs);
699 	free(commit_msg0);
700 	free(in_repo_path);
701 	free(repo_path);
702 	free(id);
703 	free(id_str);
704 	return error;
705 }
706 
707 int
708 got_output_repo_tree(struct request *c,
709     int (*cb)(struct template *, struct got_tree_entry *))
710 {
711 	const struct got_error *error = NULL;
712 	struct transport *t = c->t;
713 	struct got_commit_object *commit = NULL;
714 	struct got_repository *repo = t->repo;
715 	struct querystring *qs = t->qs;
716 	struct repo_commit *rc = NULL;
717 	struct got_object_id *tree_id = NULL, *commit_id = NULL;
718 	struct got_reflist_head refs;
719 	struct got_tree_object *tree = NULL;
720 	struct got_tree_entry *te;
721 	struct repo_dir *repo_dir = t->repo_dir;
722 	char *escaped_name = NULL, *path = NULL;
723 	int nentries, i;
724 
725 	TAILQ_INIT(&refs);
726 
727 	rc = TAILQ_FIRST(&t->repo_commits);
728 
729 	if (qs->folder != NULL) {
730 		path = strdup(qs->folder);
731 		if (path == NULL) {
732 			error = got_error_from_errno("strdup");
733 			goto done;
734 		}
735 	} else {
736 		error = got_repo_map_path(&path, repo, repo_dir->path);
737 		if (error)
738 			goto done;
739 	}
740 
741 	error = got_repo_match_object_id(&commit_id, NULL, rc->commit_id,
742 	    GOT_OBJ_TYPE_COMMIT, &refs, repo);
743 	if (error)
744 		goto done;
745 
746 	error = got_object_open_as_commit(&commit, repo, commit_id);
747 	if (error)
748 		goto done;
749 
750 	error = got_object_id_by_path(&tree_id, repo, commit, path);
751 	if (error)
752 		goto done;
753 
754 	error = got_object_open_as_tree(&tree, repo, tree_id);
755 	if (error)
756 		goto done;
757 
758 	nentries = got_object_tree_get_nentries(tree);
759 
760 	for (i = 0; i < nentries; i++) {
761 		te = got_object_tree_get_entry(tree, i);
762 		if (cb(c->tp, te) == -1) {
763 			error = got_error(GOT_ERR_CANCELLED);
764 			break;
765 		}
766 	}
767  done:
768 	free(escaped_name);
769 	free(path);
770 	got_ref_list_free(&refs);
771 	if (commit)
772 		got_object_commit_close(commit);
773 	if (tree)
774 		got_object_tree_close(tree);
775 	free(commit_id);
776 	free(tree_id);
777 	if (error) {
778 		if (error->code != GOT_ERR_CANCELLED)
779 			log_warnx("%s: %s", __func__, error->msg);
780 		return -1;
781 	}
782 	return 0;
783 }
784 
785 const struct got_error *
786 got_open_blob_for_output(struct got_blob_object **blob, int *fd,
787     int *binary, struct request *c)
788 {
789 	const struct got_error *error = NULL;
790 	struct transport *t = c->t;
791 	struct got_repository *repo = t->repo;
792 	struct querystring *qs = c->t->qs;
793 	struct got_commit_object *commit = NULL;
794 	struct got_object_id *commit_id = NULL;
795 	struct got_reflist_head refs;
796 	char *path = NULL, *in_repo_path = NULL;
797 	int obj_type;
798 
799 	TAILQ_INIT(&refs);
800 
801 	*blob = NULL;
802 	*fd = -1;
803 	*binary = 0;
804 
805 	if (asprintf(&path, "%s%s%s", qs->folder ? qs->folder : "",
806 	    qs->folder ? "/" : "", qs->file) == -1) {
807 		error = got_error_from_errno("asprintf");
808 		goto done;
809 	}
810 
811 	error = got_repo_map_path(&in_repo_path, repo, path);
812 	if (error)
813 		goto done;
814 
815 	error = got_repo_match_object_id(&commit_id, NULL, qs->commit,
816 	    GOT_OBJ_TYPE_COMMIT, &refs, repo);
817 	if (error)
818 		goto done;
819 
820 	error = got_object_open_as_commit(&commit, repo, commit_id);
821 	if (error)
822 		goto done;
823 
824 	error = got_object_id_by_path(&commit_id, repo, commit, in_repo_path);
825 	if (error)
826 		goto done;
827 
828 	if (commit_id == NULL) {
829 		error = got_error(GOT_ERR_NO_OBJ);
830 		goto done;
831 	}
832 
833 	error = got_object_get_type(&obj_type, repo, commit_id);
834 	if (error)
835 		goto done;
836 
837 	if (obj_type != GOT_OBJ_TYPE_BLOB) {
838 		error = got_error(GOT_ERR_OBJ_TYPE);
839 		goto done;
840 	}
841 
842 	error = got_gotweb_dupfd(&c->priv_fd[BLOB_FD_1], fd);
843 	if (error)
844 		goto done;
845 
846 	error = got_object_open_as_blob(blob, repo, commit_id, BUF, *fd);
847 	if (error)
848 		goto done;
849 
850 	error = got_object_blob_is_binary(binary, *blob);
851 	if (error)
852 		goto done;
853 
854  done:
855 	if (commit)
856 		got_object_commit_close(commit);
857 
858 	if (error) {
859 		if (*fd != -1)
860 			close(*fd);
861 		if (*blob)
862 			got_object_blob_close(*blob);
863 		*fd = -1;
864 		*blob = NULL;
865 	}
866 
867 	free(in_repo_path);
868 	free(commit_id);
869 	free(path);
870 	return error;
871 }
872 
873 int
874 got_output_blob_by_lines(struct template *tp, struct got_blob_object *blob,
875     int (*cb)(struct template *, const char *, size_t))
876 {
877 	const struct got_error	*err;
878 	char			*line = NULL;
879 	size_t			 linesize = 0;
880 	size_t			 lineno = 0;
881 	ssize_t			 linelen = 0;
882 
883 	for (;;) {
884 		err = got_object_blob_getline(&line, &linelen, &linesize,
885 		    blob);
886 		if (err || linelen == -1)
887 			break;
888 		lineno++;
889 		if (cb(tp, line, lineno) == -1) {
890 			err = got_error(GOT_ERR_CANCELLED);
891 			break;
892 		}
893 	}
894 
895 	free(line);
896 
897 	if (err) {
898 		if (err->code != GOT_ERR_CANCELLED)
899 			log_warnx("%s: got_object_blob_getline failed: %s",
900 			    __func__, err->msg);
901 		return -1;
902 	}
903 	return 0;
904 }
905 
906 struct blame_cb_args {
907 	struct blame_line *lines;
908 	int nlines;
909 	int nlines_prec;
910 	int lineno_cur;
911 	off_t *line_offsets;
912 	FILE *f;
913 	struct got_repository *repo;
914 	struct request *c;
915 	got_render_blame_line_cb cb;
916 };
917 
918 static const struct got_error *
919 got_gotweb_blame_cb(void *arg, int nlines, int lineno,
920     struct got_commit_object *commit, struct got_object_id *id)
921 {
922 	const struct got_error *err = NULL;
923 	struct blame_cb_args *a = arg;
924 	struct blame_line *bline;
925 	struct request *c = a->c;
926 	char *line = NULL;
927 	size_t linesize = 0;
928 	off_t offset;
929 	struct tm tm;
930 	time_t committer_time;
931 
932 	if (nlines != a->nlines ||
933 	    (lineno != -1 && lineno < 1) || lineno > a->nlines)
934 		return got_error(GOT_ERR_RANGE);
935 
936 	if (lineno == -1)
937 		return NULL; /* no change in this commit */
938 
939 	/* Annotate this line. */
940 	bline = &a->lines[lineno - 1];
941 	if (bline->annotated)
942 		return NULL;
943 	err = got_object_id_str(&bline->id_str, id);
944 	if (err)
945 		return err;
946 
947 	bline->committer = strdup(got_object_commit_get_committer(commit));
948 	if (bline->committer == NULL) {
949 		err = got_error_from_errno("strdup");
950 		goto done;
951 	}
952 
953 	committer_time = got_object_commit_get_committer_time(commit);
954 	if (gmtime_r(&committer_time, &tm) == NULL)
955 		return got_error_from_errno("gmtime_r");
956 	if (strftime(bline->datebuf, sizeof(bline->datebuf), "%G-%m-%d",
957 	    &tm) == 0) {
958 		err = got_error(GOT_ERR_NO_SPACE);
959 		goto done;
960 	}
961 	bline->annotated = 1;
962 
963 	/* Print lines annotated so far. */
964 	bline = &a->lines[a->lineno_cur - 1];
965 	if (!bline->annotated)
966 		goto done;
967 
968 	offset = a->line_offsets[a->lineno_cur - 1];
969 	if (fseeko(a->f, offset, SEEK_SET) == -1) {
970 		err = got_error_from_errno("fseeko");
971 		goto done;
972 	}
973 
974 	while (a->lineno_cur <= a->nlines && bline->annotated) {
975 		if (getline(&line, &linesize, a->f) == -1) {
976 			if (ferror(a->f))
977 				err = got_error_from_errno("getline");
978 			break;
979 		}
980 
981 		if (a->cb(c->tp, line, bline, a->nlines_prec,
982 		    a->lineno_cur) == -1) {
983 			err = got_error(GOT_ERR_CANCELLED);
984 			break;
985 		}
986 
987 		a->lineno_cur++;
988 		bline = &a->lines[a->lineno_cur - 1];
989 	}
990  done:
991 	free(line);
992 	return err;
993 }
994 
995 const struct got_error *
996 got_output_file_blame(struct request *c, got_render_blame_line_cb cb)
997 {
998 	const struct got_error *error = NULL;
999 	struct transport *t = c->t;
1000 	struct got_repository *repo = t->repo;
1001 	struct querystring *qs = c->t->qs;
1002 	struct got_object_id *obj_id = NULL, *commit_id = NULL;
1003 	struct got_commit_object *commit = NULL;
1004 	struct got_reflist_head refs;
1005 	struct got_blob_object *blob = NULL;
1006 	char *path = NULL, *in_repo_path = NULL;
1007 	struct blame_cb_args bca;
1008 	int i, obj_type, blobfd = -1, fd1 = -1, fd2 = -1;
1009 	off_t filesize;
1010 	FILE *f1 = NULL, *f2 = NULL;
1011 
1012 	TAILQ_INIT(&refs);
1013 	bca.f = NULL;
1014 	bca.lines = NULL;
1015 	bca.cb = cb;
1016 
1017 	if (asprintf(&path, "%s%s%s", qs->folder ? qs->folder : "",
1018 	    qs->folder ? "/" : "", qs->file) == -1) {
1019 		error = got_error_from_errno("asprintf");
1020 		goto done;
1021 	}
1022 
1023 	error = got_repo_map_path(&in_repo_path, repo, path);
1024 	if (error)
1025 		goto done;
1026 
1027 	error = got_repo_match_object_id(&commit_id, NULL, qs->commit,
1028 	    GOT_OBJ_TYPE_COMMIT, &refs, repo);
1029 	if (error)
1030 		goto done;
1031 
1032 	error = got_object_open_as_commit(&commit, repo, commit_id);
1033 	if (error)
1034 		goto done;
1035 
1036 	error = got_object_id_by_path(&obj_id, repo, commit, in_repo_path);
1037 	if (error)
1038 		goto done;
1039 
1040 	error = got_object_get_type(&obj_type, repo, obj_id);
1041 	if (error)
1042 		goto done;
1043 
1044 	if (obj_type != GOT_OBJ_TYPE_BLOB) {
1045 		error = got_error(GOT_ERR_OBJ_TYPE);
1046 		goto done;
1047 	}
1048 
1049 	error = got_gotweb_openfile(&bca.f, &c->priv_fd[BLAME_FD_1]);
1050 	if (error)
1051 		goto done;
1052 
1053 	error = got_gotweb_dupfd(&c->priv_fd[BLAME_FD_2], &blobfd);
1054 	if (error)
1055 		goto done;
1056 
1057 	error = got_object_open_as_blob(&blob, repo, obj_id, BUF, blobfd);
1058 	if (error)
1059 		goto done;
1060 
1061 	error = got_object_blob_dump_to_file(&filesize, &bca.nlines,
1062 	    &bca.line_offsets, bca.f, blob);
1063 	if (error || bca.nlines == 0)
1064 		goto done;
1065 
1066 	/* Don't include \n at EOF in the blame line count. */
1067 	if (bca.line_offsets[bca.nlines - 1] == filesize)
1068 		bca.nlines--;
1069 
1070 	bca.lines = calloc(bca.nlines, sizeof(*bca.lines));
1071 	if (bca.lines == NULL) {
1072 		error = got_error_from_errno("calloc");
1073 		goto done;
1074 	}
1075 	bca.lineno_cur = 1;
1076 	bca.nlines_prec = 0;
1077 	i = bca.nlines;
1078 	while (i > 0) {
1079 		i /= 10;
1080 		bca.nlines_prec++;
1081 	}
1082 	bca.repo = repo;
1083 	bca.c = c;
1084 
1085 	error = got_gotweb_dupfd(&c->priv_fd[BLAME_FD_3], &fd1);
1086 	if (error)
1087 		goto done;
1088 
1089 	error = got_gotweb_dupfd(&c->priv_fd[BLAME_FD_4], &fd2);
1090 	if (error)
1091 		goto done;
1092 
1093 	error = got_gotweb_openfile(&f1, &c->priv_fd[BLAME_FD_5]);
1094 	if (error)
1095 		goto done;
1096 
1097 	error = got_gotweb_openfile(&f2, &c->priv_fd[BLAME_FD_6]);
1098 	if (error)
1099 		goto done;
1100 
1101 	error = got_blame(in_repo_path, commit_id, repo,
1102 	    GOT_DIFF_ALGORITHM_MYERS, got_gotweb_blame_cb, &bca, NULL, NULL,
1103 	    fd1, fd2, f1, f2);
1104 
1105  done:
1106 	if (bca.lines) {
1107 		free(bca.line_offsets);
1108 		for (i = 0; i < bca.nlines; i++) {
1109 			struct blame_line *bline = &bca.lines[i];
1110 			free(bline->id_str);
1111 			free(bline->committer);
1112 		}
1113 	}
1114 	free(bca.lines);
1115 	if (blobfd != -1 && close(blobfd) == -1 && error == NULL)
1116 		error = got_error_from_errno("close");
1117 	if (fd1 != -1 && close(fd1) == -1 && error == NULL)
1118 		error = got_error_from_errno("close");
1119 	if (fd2 != -1 && close(fd2) == -1 && error == NULL)
1120 		error = got_error_from_errno("close");
1121 	if (bca.f) {
1122 		const struct got_error *bca_err = got_gotweb_closefile(bca.f);
1123 		if (error == NULL)
1124 			error = bca_err;
1125 	}
1126 	if (f1) {
1127 		const struct got_error *f1_err = got_gotweb_closefile(f1);
1128 		if (error == NULL)
1129 			error = f1_err;
1130 	}
1131 	if (f2) {
1132 		const struct got_error *f2_err = got_gotweb_closefile(f2);
1133 		if (error == NULL)
1134 			error = f2_err;
1135 	}
1136 	if (commit)
1137 		got_object_commit_close(commit);
1138 	if (blob)
1139 		got_object_blob_close(blob);
1140 	free(in_repo_path);
1141 	free(commit_id);
1142 	free(obj_id);
1143 	free(path);
1144 	got_ref_list_free(&refs);
1145 	return error;
1146 }
1147 
1148 const struct got_error *
1149 got_open_diff_for_output(FILE **fp, 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 repo_commit *rc = NULL;
1155 	struct got_object_id *id1 = NULL, *id2 = NULL;
1156 	struct got_reflist_head refs;
1157 	FILE *f1 = NULL, *f2 = NULL, *f3 = NULL;
1158 	int obj_type, fd1 = -1, fd2 = -1;
1159 
1160 	*fp = NULL;
1161 
1162 	TAILQ_INIT(&refs);
1163 
1164 	error = got_gotweb_openfile(&f1, &c->priv_fd[DIFF_FD_1]);
1165 	if (error)
1166 		return error;
1167 
1168 	error = got_gotweb_openfile(&f2, &c->priv_fd[DIFF_FD_2]);
1169 	if (error)
1170 		return error;
1171 
1172 	error = got_gotweb_openfile(&f3, &c->priv_fd[DIFF_FD_3]);
1173 	if (error)
1174 		return error;
1175 
1176 	rc = TAILQ_FIRST(&t->repo_commits);
1177 
1178 	if (rc->parent_id != NULL &&
1179 	    strncmp(rc->parent_id, "/dev/null", 9) != 0) {
1180 		error = got_repo_match_object_id(&id1, NULL,
1181 		    rc->parent_id, GOT_OBJ_TYPE_ANY,
1182 		    &refs, repo);
1183 		if (error)
1184 			goto done;
1185 	}
1186 
1187 	error = got_repo_match_object_id(&id2, NULL, rc->commit_id,
1188 	    GOT_OBJ_TYPE_ANY, &refs, repo);
1189 	if (error)
1190 		goto done;
1191 
1192 	error = got_object_get_type(&obj_type, repo, id2);
1193 	if (error)
1194 		goto done;
1195 
1196 	error = got_gotweb_dupfd(&c->priv_fd[DIFF_FD_4], &fd1);
1197 	if (error)
1198 		goto done;
1199 
1200 	error = got_gotweb_dupfd(&c->priv_fd[DIFF_FD_5], &fd2);
1201 	if (error)
1202 		goto done;
1203 
1204 	switch (obj_type) {
1205 	case GOT_OBJ_TYPE_BLOB:
1206 		error = got_diff_objects_as_blobs(NULL, NULL, f1, f2, fd1, fd2,
1207 		     id1, id2, NULL, NULL, GOT_DIFF_ALGORITHM_MYERS, 3, 0, 0,
1208 		     NULL, repo, f3);
1209 		break;
1210 	case GOT_OBJ_TYPE_TREE:
1211 		error = got_diff_objects_as_trees(NULL, NULL, f1, f2, fd1, fd2,
1212 		    id1, id2, NULL, "", "",  GOT_DIFF_ALGORITHM_MYERS, 3, 0, 0,
1213 		    NULL, repo, f3);
1214 		break;
1215 	case GOT_OBJ_TYPE_COMMIT:
1216 		error = got_diff_objects_as_commits(NULL, NULL, f1, f2, fd1,
1217 		    fd2, id1, id2, NULL,  GOT_DIFF_ALGORITHM_MYERS, 3, 0, 0,
1218 		    NULL, repo, f3);
1219 		break;
1220 	default:
1221 		error = got_error(GOT_ERR_OBJ_TYPE);
1222 	}
1223 	if (error)
1224 		goto done;
1225 
1226 	if (fseek(f3, 0, SEEK_SET) == -1) {
1227 		error = got_ferror(f3, GOT_ERR_IO);
1228 		goto done;
1229 	}
1230 
1231 	*fp = f3;
1232 
1233  done:
1234 	if (fd1 != -1 && close(fd1) == -1 && error == NULL)
1235 		error = got_error_from_errno("close");
1236 	if (fd2 != -1 && close(fd2) == -1 && error == NULL)
1237 		error = got_error_from_errno("close");
1238 	if (f1) {
1239 		const struct got_error *f1_err = got_gotweb_closefile(f1);
1240 		if (error == NULL)
1241 			error = f1_err;
1242 	}
1243 	if (f2) {
1244 		const struct got_error *f2_err = got_gotweb_closefile(f2);
1245 		if (error == NULL)
1246 			error = f2_err;
1247 	}
1248 	if (error && f3) {
1249 		got_gotweb_closefile(f3);
1250 		*fp = NULL;
1251 	}
1252 	got_ref_list_free(&refs);
1253 	free(id1);
1254 	free(id2);
1255 	return error;
1256 }
1257 
1258 static const struct got_error *
1259 got_init_repo_commit(struct repo_commit **rc)
1260 {
1261 	*rc = calloc(1, sizeof(**rc));
1262 	if (*rc == NULL)
1263 		return got_error_from_errno2(__func__, "calloc");
1264 
1265 	(*rc)->path = NULL;
1266 	(*rc)->refs_str = NULL;
1267 	(*rc)->commit_id = NULL;
1268 	(*rc)->committer = NULL;
1269 	(*rc)->author = NULL;
1270 	(*rc)->parent_id = NULL;
1271 	(*rc)->tree_id = NULL;
1272 	(*rc)->commit_msg = NULL;
1273 
1274 	return NULL;
1275 }
1276 
1277 static const struct got_error *
1278 got_init_repo_tag(struct repo_tag **rt)
1279 {
1280 	*rt = calloc(1, sizeof(**rt));
1281 	if (*rt == NULL)
1282 		return got_error_from_errno2(__func__, "calloc");
1283 
1284 	(*rt)->commit_id = NULL;
1285 	(*rt)->tag_name = NULL;
1286 	(*rt)->tag_commit = NULL;
1287 	(*rt)->commit_msg = NULL;
1288 	(*rt)->tagger = NULL;
1289 
1290 	return NULL;
1291 }