Game of Trees Repos

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Date:: Sun Jan 22 11:17:51 2023 UTC
Message:: gotwebd: turn gotweb_get_time_str into gotweb_render_age ok jamsek
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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_blame_cb(void *, int, int,
52     struct got_commit_object *,struct got_object_id *);
53 
54 const struct got_error *
55 got_gotweb_flushfile(FILE *f, int fd)
56 {
57 	if (fseek(f, 0, SEEK_SET) == -1)
58 		return got_error_from_errno("fseek");
59 
60 	if (ftruncate(fd, 0) == -1)
61 		return got_error_from_errno("ftruncate");
62 
63 	if (fsync(fd) == -1)
64 		return got_error_from_errno("fsync");
65 
66 	if (f && fclose(f) == EOF)
67 		return got_error_from_errno("fclose");
68 
69 	if (fd != -1 && close(fd) != -1)
70 		return got_error_from_errno("close");
71 
72 	return NULL;
73 }
74 
75 static const struct got_error *
76 got_gotweb_openfile(FILE **f, int *priv_fd, int *fd)
77 {
78 	*fd = dup(*priv_fd);
79 	if (*fd == -1)
80 		return got_error_from_errno("dup");
81 
82 	*f = fdopen(*fd, "w+");
83 	if (*f == NULL) {
84 		close(*fd);
85 		return got_error(GOT_ERR_PRIVSEP_NO_FD);
86 	}
87 
88 	return NULL;
89 }
90 
91 static const struct got_error *
92 got_gotweb_dupfd(int *priv_fd, int *fd)
93 {
94 	*fd = dup(*priv_fd);
95 
96 	if (*fd < 0)
97 		return NULL;
98 
99 	return NULL;
100 }
101 
102 const struct got_error *
103 got_get_repo_owner(char **owner, struct request *c)
104 {
105 	struct server *srv = c->srv;
106 	struct transport *t = c->t;
107 	struct got_repository *repo = t->repo;
108 	const char *gitconfig_owner;
109 
110 	*owner = NULL;
111 
112 	if (srv->show_repo_owner == 0)
113 		return NULL;
114 
115 	gitconfig_owner = got_repo_get_gitconfig_owner(repo);
116 	if (gitconfig_owner) {
117 		*owner = strdup(gitconfig_owner);
118 		if (*owner == NULL)
119 			return got_error_from_errno("strdup");
120 	} else {
121 		*owner = strdup("");
122 		if (*owner == NULL)
123 			return got_error_from_errno("strdup");
124 	}
125 	return NULL;
126 }
127 
128 const struct got_error *
129 got_get_repo_age(time_t *repo_age, struct request *c, const char *refname)
130 {
131 	const struct got_error *error = NULL;
132 	struct server *srv = c->srv;
133 	struct transport *t = c->t;
134 	struct got_repository *repo = t->repo;
135 	struct got_commit_object *commit = NULL;
136 	struct got_reflist_head refs;
137 	struct got_reflist_entry *re;
138 	time_t committer_time = 0, cmp_time = 0;
139 
140 	TAILQ_INIT(&refs);
141 
142 	if (srv->show_repo_age == 0)
143 		return NULL;
144 
145 	error = got_ref_list(&refs, repo, "refs/heads",
146 	    got_ref_cmp_by_name, NULL);
147 	if (error)
148 		goto done;
149 
150 	/*
151 	 * Find the youngest branch tip in the repository, or the age of
152 	 * the a specific branch tip if a name was provided by the caller.
153 	 */
154 	TAILQ_FOREACH(re, &refs, entry) {
155 		struct got_object_id *id = NULL;
156 
157 		if (refname && strcmp(got_ref_get_name(re->ref), refname) != 0)
158 			continue;
159 
160 		error = got_ref_resolve(&id, repo, re->ref);
161 		if (error)
162 			goto done;
163 
164 		error = got_object_open_as_commit(&commit, repo, id);
165 		free(id);
166 		if (error)
167 			goto done;
168 
169 		committer_time =
170 		    got_object_commit_get_committer_time(commit);
171 		got_object_commit_close(commit);
172 		if (cmp_time < committer_time)
173 			cmp_time = committer_time;
174 
175 		if (refname)
176 			break;
177 	}
178 
179 	if (cmp_time != 0)
180 		*repo_age = cmp_time;
181 done:
182 	got_ref_list_free(&refs);
183 	return error;
184 }
185 
186 static const struct got_error *
187 got_get_repo_commit(struct request *c, struct repo_commit *repo_commit,
188     struct got_commit_object *commit, struct got_reflist_head *refs,
189     struct got_object_id *id)
190 {
191 	const struct got_error *error = NULL;
192 	struct got_reflist_entry *re;
193 	struct got_object_id *id2 = NULL;
194 	struct got_object_qid *parent_id;
195 	struct transport *t = c->t;
196 	struct querystring *qs = c->t->qs;
197 	char *commit_msg = NULL, *commit_msg0;
198 
199 	TAILQ_FOREACH(re, refs, entry) {
200 		char *s;
201 		const char *name;
202 		struct got_tag_object *tag = NULL;
203 		struct got_object_id *ref_id;
204 		int cmp;
205 
206 		if (got_ref_is_symbolic(re->ref))
207 			continue;
208 
209 		name = got_ref_get_name(re->ref);
210 		if (strncmp(name, "refs/", 5) == 0)
211 			name += 5;
212 		if (strncmp(name, "got/", 4) == 0)
213 			continue;
214 		if (strncmp(name, "heads/", 6) == 0)
215 			name += 6;
216 		if (strncmp(name, "remotes/", 8) == 0) {
217 			name += 8;
218 			if (strstr(name, "/" GOT_REF_HEAD) != NULL)
219 				continue;
220 		}
221 		error = got_ref_resolve(&ref_id, t->repo, re->ref);
222 		if (error)
223 			return error;
224 		if (strncmp(name, "tags/", 5) == 0) {
225 			error = got_object_open_as_tag(&tag, t->repo, ref_id);
226 			if (error) {
227 				if (error->code != GOT_ERR_OBJ_TYPE) {
228 					free(ref_id);
229 					continue;
230 				}
231 				/*
232 				 * Ref points at something other
233 				 * than a tag.
234 				 */
235 				error = NULL;
236 				tag = NULL;
237 			}
238 		}
239 		cmp = got_object_id_cmp(tag ?
240 		    got_object_tag_get_object_id(tag) : ref_id, id);
241 		free(ref_id);
242 		if (tag)
243 			got_object_tag_close(tag);
244 		if (cmp != 0)
245 			continue;
246 		s = repo_commit->refs_str;
247 		if (asprintf(&repo_commit->refs_str, "%s%s%s", s ? s : "",
248 		    s ? ", " : "", name) == -1) {
249 			error = got_error_from_errno("asprintf");
250 			free(s);
251 			repo_commit->refs_str = NULL;
252 			return error;
253 		}
254 		free(s);
255 	}
256 
257 	error = got_object_id_str(&repo_commit->commit_id, id);
258 	if (error)
259 		return error;
260 
261 	error = got_object_id_str(&repo_commit->tree_id,
262 	    got_object_commit_get_tree_id(commit));
263 	if (error)
264 		return error;
265 
266 	if (qs->action == DIFF) {
267 		parent_id = STAILQ_FIRST(
268 		    got_object_commit_get_parent_ids(commit));
269 		if (parent_id != NULL) {
270 			id2 = got_object_id_dup(&parent_id->id);
271 			error = got_object_id_str(&repo_commit->parent_id, id2);
272 			if (error)
273 				return error;
274 			free(id2);
275 		} else {
276 			repo_commit->parent_id = strdup("/dev/null");
277 			if (repo_commit->parent_id == NULL) {
278 				error = got_error_from_errno("strdup");
279 				return error;
280 			}
281 		}
282 	}
283 
284 	repo_commit->committer_time =
285 	    got_object_commit_get_committer_time(commit);
286 
287 	repo_commit->author =
288 	    strdup(got_object_commit_get_author(commit));
289 	if (repo_commit->author == NULL) {
290 		error = got_error_from_errno("strdup");
291 		return error;
292 	}
293 	repo_commit->committer =
294 	    strdup(got_object_commit_get_committer(commit));
295 	if (repo_commit->committer == NULL) {
296 		error = got_error_from_errno("strdup");
297 		return error;
298 	}
299 	error = got_object_commit_get_logmsg(&commit_msg0, commit);
300 	if (error)
301 		return error;
302 
303 	commit_msg = commit_msg0;
304 	while (*commit_msg == '\n')
305 		commit_msg++;
306 
307 	repo_commit->commit_msg = strdup(commit_msg);
308 	if (repo_commit->commit_msg == NULL)
309 		error = got_error_from_errno("strdup");
310 	free(commit_msg0);
311 	return error;
312 }
313 
314 const struct got_error *
315 got_get_repo_commits(struct request *c, int limit)
316 {
317 	const struct got_error *error = NULL;
318 	struct got_object_id *id = NULL;
319 	struct got_commit_graph *graph = NULL;
320 	struct got_commit_object *commit = NULL;
321 	struct got_reflist_head refs;
322 	struct got_reference *ref = NULL;
323 	struct repo_commit *repo_commit = NULL;
324 	struct server *srv = c->srv;
325 	struct transport *t = c->t;
326 	struct got_repository *repo = t->repo;
327 	struct querystring *qs = t->qs;
328 	struct repo_dir *repo_dir = t->repo_dir;
329 	char *in_repo_path = NULL, *repo_path = NULL, *file_path = NULL;
330 	int chk_next = 0, chk_multi = 0, commit_found = 0;
331 	int obj_type, limit_chk = 0;
332 
333 	TAILQ_INIT(&refs);
334 
335 	if (qs->file != NULL && strlen(qs->file) > 0)
336 		if (asprintf(&file_path, "%s/%s", qs->folder ? qs->folder : "",
337 		    qs->file) == -1)
338 			return got_error_from_errno("asprintf");
339 
340 	if (asprintf(&repo_path, "%s/%s", srv->repos_path,
341 	    repo_dir->name) == -1) {
342 		error = got_error_from_errno("asprintf");
343 		goto done;
344 	}
345 
346 	/*
347 	 * XXX: jumping directly to a commit id via
348 	 * got_repo_match_object_id_prefix significantly improves performance,
349 	 * but does not allow us to create a PREVIOUS button, since commits can
350 	 * only be itereated forward. So, we have to match as we iterate from
351 	 * the headref.
352 	 */
353 	if (qs->action == BRIEFS || qs->action == COMMITS ||
354 	    (qs->action == TREE && qs->commit == NULL)) {
355 		error = got_ref_open(&ref, repo, qs->headref, 0);
356 		if (error)
357 			goto done;
358 
359 		error = got_ref_resolve(&id, repo, ref);
360 		if (error)
361 			goto done;
362 	} else if (qs->commit != NULL) {
363 		error = got_ref_open(&ref, repo, qs->commit, 0);
364 		if (error == NULL) {
365 			error = got_ref_resolve(&id, repo, ref);
366 			if (error)
367 				goto done;
368 			error = got_object_get_type(&obj_type, repo, id);
369 			if (error)
370 				goto done;
371 			if (obj_type == GOT_OBJ_TYPE_TAG) {
372 				struct got_tag_object *tag;
373 				error = got_object_open_as_tag(&tag, repo, id);
374 				if (error)
375 					goto done;
376 				if (got_object_tag_get_object_type(tag) !=
377 				    GOT_OBJ_TYPE_COMMIT) {
378 					got_object_tag_close(tag);
379 					error = got_error(GOT_ERR_OBJ_TYPE);
380 					goto done;
381 				}
382 				free(id);
383 				id = got_object_id_dup(
384 				    got_object_tag_get_object_id(tag));
385 				if (id == NULL)
386 					error = got_error_from_errno(
387 					    "got_object_id_dup");
388 				got_object_tag_close(tag);
389 				if (error)
390 					goto done;
391 			} else if (obj_type != GOT_OBJ_TYPE_COMMIT) {
392 				error = got_error(GOT_ERR_OBJ_TYPE);
393 				goto done;
394 			}
395 		}
396 		error = got_repo_match_object_id_prefix(&id, qs->commit,
397 		    GOT_OBJ_TYPE_COMMIT, repo);
398 		if (error)
399 			goto done;
400 	}
401 
402 	error = got_repo_map_path(&in_repo_path, repo, repo_path);
403 	if (error)
404 		goto done;
405 
406 	error = got_ref_list(&refs, repo, NULL, got_ref_cmp_by_name, NULL);
407 	if (error)
408 		goto done;
409 
410 	if (qs->file != NULL && strlen(qs->file) > 0) {
411 		error = got_commit_graph_open(&graph, file_path, 0);
412 		if (error)
413 			goto done;
414 	} else {
415 		error = got_commit_graph_open(&graph, in_repo_path, 0);
416 		if (error)
417 			goto done;
418 	}
419 
420 	error = got_commit_graph_iter_start(graph, id, repo, NULL, NULL);
421 	if (error)
422 		goto done;
423 
424 	for (;;) {
425 		struct got_object_id next_id;
426 
427 		error = got_commit_graph_iter_next(&next_id, graph, repo, NULL,
428 		    NULL);
429 		if (error) {
430 			if (error->code == GOT_ERR_ITER_COMPLETED)
431 				error = NULL;
432 			goto done;
433 		}
434 
435 		error = got_object_open_as_commit(&commit, repo, &next_id);
436 		if (error)
437 			goto done;
438 
439 		error = got_ref_list(&refs, repo, NULL, got_ref_cmp_by_name,
440 		    NULL);
441 		if (error)
442 			goto done;
443 
444 		error = got_init_repo_commit(&repo_commit);
445 		if (error)
446 			goto done;
447 
448 		error = got_get_repo_commit(c, repo_commit, commit,
449 		    &refs, &next_id);
450 		if (error) {
451 			gotweb_free_repo_commit(repo_commit);
452 			goto done;
453 		}
454 
455 		if (limit_chk == ((limit * qs->page) - limit) &&
456 		    commit_found == 0 && repo_commit->commit_id != NULL) {
457 			t->prev_id = strdup(repo_commit->commit_id);
458 			if (t->prev_id == NULL) {
459 				error = got_error_from_errno("strdup");
460 				gotweb_free_repo_commit(repo_commit);
461 				goto done;
462 			}
463 		}
464 
465 		if (qs->commit != NULL && commit_found == 0 && limit != 1) {
466 			if (strcmp(qs->commit, repo_commit->commit_id) == 0)
467 				commit_found = 1;
468 			else if (qs->file != NULL && strlen(qs->file) > 0 &&
469 			    qs->page == 0)
470 				commit_found = 1;
471 			else {
472 				gotweb_free_repo_commit(repo_commit);
473 				limit_chk++;
474 				continue;
475 			}
476 		}
477 
478 		TAILQ_INSERT_TAIL(&t->repo_commits, repo_commit, entry);
479 
480 		if (limit == 1 && chk_multi == 0 &&
481 		    srv->max_commits_display != 1)
482 			commit_found = 1;
483 		else {
484 			chk_multi = 1;
485 
486 			/*
487 			 * check for one more commit before breaking,
488 			 * so we know whether to navigate through briefs
489 			 * commits and summary
490 			 */
491 			if (chk_next && (qs->action == BRIEFS ||
492 			    qs->action == COMMITS || qs->action == SUMMARY)) {
493 				t->next_id = strdup(repo_commit->commit_id);
494 				if (t->next_id == NULL) {
495 					error = got_error_from_errno("strdup");
496 					goto done;
497 				}
498 				if (commit) {
499 					got_object_commit_close(commit);
500 					commit = NULL;
501 				}
502 				TAILQ_REMOVE(&t->repo_commits, repo_commit,
503 				    entry);
504 				gotweb_free_repo_commit(repo_commit);
505 				goto done;
506 			}
507 		}
508 		got_ref_list_free(&refs);
509 		if (error || (limit && --limit == 0)) {
510 			if (commit_found || (qs->file != NULL &&
511 			    strlen(qs->file) > 0))
512 				if (chk_multi == 0)
513 					break;
514 			chk_next = 1;
515 		}
516 		if (commit) {
517 			got_object_commit_close(commit);
518 			commit = NULL;
519 		}
520 	}
521 done:
522 	if (ref)
523 		got_ref_close(ref);
524 	if (commit)
525 		got_object_commit_close(commit);
526 	if (graph)
527 		got_commit_graph_close(graph);
528 	got_ref_list_free(&refs);
529 	free(in_repo_path);
530 	free(file_path);
531 	free(repo_path);
532 	free(id);
533 	return error;
534 }
535 
536 const struct got_error *
537 got_get_repo_tags(struct request *c, int limit)
538 {
539 	const struct got_error *error = NULL;
540 	struct got_object_id *id = NULL;
541 	struct got_commit_object *commit = NULL;
542 	struct got_reflist_head refs;
543 	struct got_reference *ref;
544 	struct got_reflist_entry *re;
545 	struct server *srv = c->srv;
546 	struct transport *t = c->t;
547 	struct got_repository *repo = t->repo;
548 	struct querystring *qs = t->qs;
549 	struct repo_dir *repo_dir = t->repo_dir;
550 	struct got_tag_object *tag = NULL;
551 	struct repo_tag *rt = NULL, *trt = NULL;
552 	char *in_repo_path = NULL, *repo_path = NULL, *id_str = NULL;
553 	char *tag_commit = NULL, *tag_commit0 = NULL;
554 	char *commit_msg = NULL, *commit_msg0 = NULL;
555 	int chk_next = 0, chk_multi = 1, commit_found = 0, c_cnt = 0;
556 
557 	TAILQ_INIT(&refs);
558 
559 	if (asprintf(&repo_path, "%s/%s", srv->repos_path,
560 	    repo_dir->name) == -1)
561 		return got_error_from_errno("asprintf");
562 
563 	if (qs->commit == NULL && (qs->action == TAGS || qs->action == RSS)) {
564 		error = got_ref_open(&ref, repo, qs->headref, 0);
565 		if (error)
566 			goto err;
567 		error = got_ref_resolve(&id, repo, ref);
568 		got_ref_close(ref);
569 		if (error)
570 			goto err;
571 	} else if (qs->commit == NULL && qs->action == TAG) {
572 		error = got_error_msg(GOT_ERR_EOF, "commit id missing");
573 		goto err;
574 	} else {
575 		error = got_repo_match_object_id_prefix(&id, qs->commit,
576 		    GOT_OBJ_TYPE_COMMIT, repo);
577 		if (error)
578 			goto err;
579 	}
580 
581 	if (qs->action != SUMMARY && qs->action != TAGS) {
582 		error = got_object_open_as_commit(&commit, repo, id);
583 		if (error)
584 			goto err;
585 		error = got_object_commit_get_logmsg(&commit_msg0, commit);
586 		if (error)
587 			goto err;
588 		if (commit) {
589 			got_object_commit_close(commit);
590 			commit = NULL;
591 		}
592 	}
593 
594 	error = got_repo_map_path(&in_repo_path, repo, repo_path);
595 	if (error)
596 		goto err;
597 
598 	error = got_ref_list(&refs, repo, "refs/tags", got_ref_cmp_tags,
599 	   repo);
600 	if (error)
601 		goto err;
602 
603 	if (limit == 1)
604 		chk_multi = 0;
605 
606 	/*
607 	 * XXX: again, see previous message about caching
608 	 */
609 
610 	TAILQ_FOREACH(re, &refs, entry) {
611 		struct repo_tag *new_repo_tag = NULL;
612 		error = got_init_repo_tag(&new_repo_tag);
613 		if (error)
614 			goto err;
615 
616 		TAILQ_INSERT_TAIL(&t->repo_tags, new_repo_tag, entry);
617 
618 		new_repo_tag->tag_name = strdup(got_ref_get_name(re->ref));
619 		if (new_repo_tag->tag_name == NULL) {
620 			error = got_error_from_errno("strdup");
621 			goto err;
622 		}
623 
624 		free(id);
625 		id = NULL;
626 
627 		free(id_str);
628 		id_str = NULL;
629 
630 		error = got_ref_resolve(&id, repo, re->ref);
631 		if (error)
632 			goto done;
633 
634 		if (tag)
635 			got_object_tag_close(tag);
636 		error = got_object_open_as_tag(&tag, repo, id);
637 		if (error) {
638 			if (error->code != GOT_ERR_OBJ_TYPE)
639 				goto done;
640 			/* "lightweight" tag */
641 			error = got_object_open_as_commit(&commit, repo, id);
642 			if (error)
643 				goto done;
644 			new_repo_tag->tagger =
645 			    strdup(got_object_commit_get_committer(commit));
646 			if (new_repo_tag->tagger == NULL) {
647 				error = got_error_from_errno("strdup");
648 				goto err;
649 			}
650 			new_repo_tag->tagger_time =
651 			    got_object_commit_get_committer_time(commit);
652 			error = got_object_id_str(&id_str, id);
653 			if (error)
654 				goto err;
655 		} else {
656 			new_repo_tag->tagger =
657 			    strdup(got_object_tag_get_tagger(tag));
658 			if (new_repo_tag->tagger == NULL) {
659 				error = got_error_from_errno("strdup");
660 				goto err;
661 			}
662 			new_repo_tag->tagger_time =
663 			    got_object_tag_get_tagger_time(tag);
664 			error = got_object_id_str(&id_str,
665 			    got_object_tag_get_object_id(tag));
666 			if (error)
667 				goto err;
668 		}
669 
670 		new_repo_tag->commit_id = strdup(id_str);
671 		if (new_repo_tag->commit_id == NULL)
672 			goto err;
673 
674 		if (commit_found == 0 && qs->commit != NULL &&
675 		    strncmp(id_str, qs->commit, strlen(id_str)) != 0)
676 			continue;
677 		else
678 			commit_found = 1;
679 
680 		t->tag_count++;
681 
682 		/*
683 		 * check for one more commit before breaking,
684 		 * so we know whether to navigate through briefs
685 		 * commits and summary
686 		 */
687 		if (chk_next) {
688 			t->next_id = strdup(new_repo_tag->commit_id);
689 			if (t->next_id == NULL) {
690 				error = got_error_from_errno("strdup");
691 				goto err;
692 			}
693 			if (commit) {
694 				got_object_commit_close(commit);
695 				commit = NULL;
696 			}
697 			TAILQ_REMOVE(&t->repo_tags, new_repo_tag, entry);
698 			gotweb_free_repo_tag(new_repo_tag);
699 			goto done;
700 		}
701 
702 		if (commit) {
703 			error = got_object_commit_get_logmsg(&tag_commit0,
704 			    commit);
705 			if (error)
706 				goto err;
707 			got_object_commit_close(commit);
708 			commit = NULL;
709 		} else {
710 			tag_commit0 = strdup(got_object_tag_get_message(tag));
711 			if (tag_commit0 == NULL) {
712 				error = got_error_from_errno("strdup");
713 				goto err;
714 			}
715 		}
716 
717 		tag_commit = tag_commit0;
718 		while (*tag_commit == '\n')
719 			tag_commit++;
720 		new_repo_tag->tag_commit = strdup(tag_commit);
721 		if (new_repo_tag->tag_commit == NULL) {
722 			error = got_error_from_errno("strdup");
723 			free(tag_commit0);
724 			goto err;
725 		}
726 		free(tag_commit0);
727 
728 		if (qs->action != SUMMARY && qs->action != TAGS) {
729 			commit_msg = commit_msg0;
730 			while (*commit_msg == '\n')
731 				commit_msg++;
732 
733 			new_repo_tag->commit_msg = strdup(commit_msg);
734 			if (new_repo_tag->commit_msg == NULL) {
735 				error = got_error_from_errno("strdup");
736 				goto err;
737 			}
738 		}
739 
740 		if (limit && --limit == 0) {
741 			if (chk_multi == 0)
742 				break;
743 			chk_next = 1;
744 		}
745 	}
746 
747 done:
748 	/*
749 	 * we have tailq populated, so find previous commit id
750 	 * for navigation through briefs and commits
751 	 */
752 	if (t->tag_count == 0) {
753 		TAILQ_FOREACH_SAFE(rt, &t->repo_tags, entry, trt) {
754 			TAILQ_REMOVE(&t->repo_tags, rt, entry);
755 			gotweb_free_repo_tag(rt);
756 		}
757 	}
758 	if (t->tag_count > 0 && t->prev_id == NULL && qs->commit != NULL) {
759 		commit_found = 0;
760 		TAILQ_FOREACH_REVERSE(rt, &t->repo_tags, repo_tags_head,
761 		    entry) {
762 			if (commit_found == 0 && rt->commit_id != NULL &&
763 			    strcmp(qs->commit, rt->commit_id) != 0) {
764 				continue;
765 			} else
766 				commit_found = 1;
767 			if (c_cnt == srv->max_commits_display ||
768 			    rt == TAILQ_FIRST(&t->repo_tags)) {
769 				t->prev_id = strdup(rt->commit_id);
770 				if (t->prev_id == NULL)
771 					error = got_error_from_errno("strdup");
772 				break;
773 			}
774 			c_cnt++;
775 		}
776 	}
777 err:
778 	if (commit)
779 		got_object_commit_close(commit);
780 	if (tag)
781 		got_object_tag_close(tag);
782 	got_ref_list_free(&refs);
783 	free(commit_msg0);
784 	free(in_repo_path);
785 	free(repo_path);
786 	free(id);
787 	free(id_str);
788 	return error;
789 }
790 
791 int
792 got_output_repo_tree(struct request *c,
793     int (*cb)(struct template *, struct got_tree_entry *))
794 {
795 	const struct got_error *error = NULL;
796 	struct transport *t = c->t;
797 	struct got_commit_object *commit = NULL;
798 	struct got_repository *repo = t->repo;
799 	struct querystring *qs = t->qs;
800 	struct repo_commit *rc = NULL;
801 	struct got_object_id *tree_id = NULL, *commit_id = NULL;
802 	struct got_reflist_head refs;
803 	struct got_tree_object *tree = NULL;
804 	struct got_tree_entry *te;
805 	struct repo_dir *repo_dir = t->repo_dir;
806 	char *escaped_name = NULL, *path = NULL;
807 	int nentries, i;
808 
809 	TAILQ_INIT(&refs);
810 
811 	rc = TAILQ_FIRST(&t->repo_commits);
812 
813 	if (qs->folder != NULL) {
814 		path = strdup(qs->folder);
815 		if (path == NULL) {
816 			error = got_error_from_errno("strdup");
817 			goto done;
818 		}
819 	} else {
820 		error = got_repo_map_path(&path, repo, repo_dir->path);
821 		if (error)
822 			goto done;
823 	}
824 
825 	error = got_repo_match_object_id(&commit_id, NULL, rc->commit_id,
826 	    GOT_OBJ_TYPE_COMMIT, &refs, repo);
827 	if (error)
828 		goto done;
829 
830 	error = got_object_open_as_commit(&commit, repo, commit_id);
831 	if (error)
832 		goto done;
833 
834 	error = got_object_id_by_path(&tree_id, repo, commit, path);
835 	if (error)
836 		goto done;
837 
838 	error = got_object_open_as_tree(&tree, repo, tree_id);
839 	if (error)
840 		goto done;
841 
842 	nentries = got_object_tree_get_nentries(tree);
843 
844 	for (i = 0; i < nentries; i++) {
845 		te = got_object_tree_get_entry(tree, i);
846 		if (cb(c->tp, te) == -1)
847 			break;
848 	}
849 done:
850 	free(escaped_name);
851 	free(path);
852 	got_ref_list_free(&refs);
853 	if (commit)
854 		got_object_commit_close(commit);
855 	if (tree)
856 		got_object_tree_close(tree);
857 	free(commit_id);
858 	free(tree_id);
859 	if (error) {
860 		log_warnx("%s: %s", __func__, error->msg);
861 		return -1;
862 	}
863 	return 0;
864 }
865 
866 const struct got_error *
867 got_open_blob_for_output(struct got_blob_object **blob, int *fd,
868     int *binary, struct request *c)
869 {
870 	const struct got_error *error = NULL;
871 	struct transport *t = c->t;
872 	struct got_repository *repo = t->repo;
873 	struct querystring *qs = c->t->qs;
874 	struct got_commit_object *commit = NULL;
875 	struct got_object_id *commit_id = NULL;
876 	struct got_reflist_head refs;
877 	char *path = NULL, *in_repo_path = NULL;
878 	int obj_type;
879 
880 	TAILQ_INIT(&refs);
881 
882 	*blob = NULL;
883 	*fd = -1;
884 	*binary = 0;
885 
886 	if (asprintf(&path, "%s%s%s", qs->folder ? qs->folder : "",
887 	    qs->folder ? "/" : "", qs->file) == -1) {
888 		error = got_error_from_errno("asprintf");
889 		goto done;
890 	}
891 
892 	error = got_repo_map_path(&in_repo_path, repo, path);
893 	if (error)
894 		goto done;
895 
896 	error = got_repo_match_object_id(&commit_id, NULL, qs->commit,
897 	    GOT_OBJ_TYPE_COMMIT, &refs, repo);
898 	if (error)
899 		goto done;
900 
901 	error = got_object_open_as_commit(&commit, repo, commit_id);
902 	if (error)
903 		goto done;
904 
905 	error = got_object_id_by_path(&commit_id, repo, commit, in_repo_path);
906 	if (error)
907 		goto done;
908 
909 	if (commit_id == NULL) {
910 		error = got_error(GOT_ERR_NO_OBJ);
911 		goto done;
912 	}
913 
914 	error = got_object_get_type(&obj_type, repo, commit_id);
915 	if (error)
916 		goto done;
917 
918 	if (obj_type != GOT_OBJ_TYPE_BLOB) {
919 		error = got_error(GOT_ERR_OBJ_TYPE);
920 		goto done;
921 	}
922 
923 	error = got_gotweb_dupfd(&c->priv_fd[BLOB_FD_1], fd);
924 	if (error)
925 		goto done;
926 
927 	error = got_object_open_as_blob(blob, repo, commit_id, BUF, *fd);
928 	if (error)
929 		goto done;
930 
931 	error = got_object_blob_is_binary(binary, *blob);
932 	if (error)
933 		goto done;
934 
935  done:
936 	if (commit)
937 		got_object_commit_close(commit);
938 
939 	if (error) {
940 		if (*fd != -1)
941 			close(*fd);
942 		if (*blob)
943 			got_object_blob_close(*blob);
944 		*fd = -1;
945 		*blob = NULL;
946 	}
947 
948 	free(in_repo_path);
949 	free(commit_id);
950 	free(path);
951 	return error;
952 }
953 
954 int
955 got_output_blob_by_lines(struct template *tp, struct got_blob_object *blob,
956     int (*cb)(struct template *, const char *, size_t))
957 {
958 	const struct got_error	*err;
959 	char			*line = NULL;
960 	size_t			 linesize = 0;
961 	size_t			 lineno = 0;
962 	ssize_t			 linelen = 0;
963 
964 	for (;;) {
965 		err = got_object_blob_getline(&line, &linelen, &linesize,
966 		    blob);
967 		if (err || linelen == -1)
968 			break;
969 		lineno++;
970 		if (cb(tp, line, lineno) == -1)
971 			break;
972 	}
973 
974 	free(line);
975 
976 	if (err) {
977 		log_warnx("%s: got_object_blob_getline failed: %s",
978 		    __func__, err->msg);
979 		return -1;
980 	}
981 	return 0;
982 }
983 
984 struct blame_cb_args {
985 	struct blame_line *lines;
986 	int nlines;
987 	int nlines_prec;
988 	int lineno_cur;
989 	off_t *line_offsets;
990 	FILE *f;
991 	struct got_repository *repo;
992 	struct request *c;
993 	got_render_blame_line_cb cb;
994 };
995 
996 static const struct got_error *
997 got_gotweb_blame_cb(void *arg, int nlines, int lineno,
998     struct got_commit_object *commit, struct got_object_id *id)
999 {
1000 	const struct got_error *err = NULL;
1001 	struct blame_cb_args *a = arg;
1002 	struct blame_line *bline;
1003 	struct request *c = a->c;
1004 	char *line = NULL;
1005 	size_t linesize = 0;
1006 	off_t offset;
1007 	struct tm tm;
1008 	time_t committer_time;
1009 
1010 	if (nlines != a->nlines ||
1011 	    (lineno != -1 && lineno < 1) || lineno > a->nlines)
1012 		return got_error(GOT_ERR_RANGE);
1013 
1014 	if (lineno == -1)
1015 		return NULL; /* no change in this commit */
1016 
1017 	/* Annotate this line. */
1018 	bline = &a->lines[lineno - 1];
1019 	if (bline->annotated)
1020 		return NULL;
1021 	err = got_object_id_str(&bline->id_str, id);
1022 	if (err)
1023 		return err;
1024 
1025 	bline->committer = strdup(got_object_commit_get_committer(commit));
1026 	if (bline->committer == NULL) {
1027 		err = got_error_from_errno("strdup");
1028 		goto done;
1029 	}
1030 
1031 	committer_time = got_object_commit_get_committer_time(commit);
1032 	if (gmtime_r(&committer_time, &tm) == NULL)
1033 		return got_error_from_errno("gmtime_r");
1034 	if (strftime(bline->datebuf, sizeof(bline->datebuf), "%G-%m-%d",
1035 	    &tm) == 0) {
1036 		err = got_error(GOT_ERR_NO_SPACE);
1037 		goto done;
1038 	}
1039 	bline->annotated = 1;
1040 
1041 	/* Print lines annotated so far. */
1042 	bline = &a->lines[a->lineno_cur - 1];
1043 	if (!bline->annotated)
1044 		goto done;
1045 
1046 	offset = a->line_offsets[a->lineno_cur - 1];
1047 	if (fseeko(a->f, offset, SEEK_SET) == -1) {
1048 		err = got_error_from_errno("fseeko");
1049 		goto done;
1050 	}
1051 
1052 	while (a->lineno_cur <= a->nlines && bline->annotated) {
1053 		if (getline(&line, &linesize, a->f) == -1) {
1054 			if (ferror(a->f))
1055 				err = got_error_from_errno("getline");
1056 			break;
1057 		}
1058 
1059 		if (a->cb(c->tp, line, bline, a->nlines_prec,
1060 		    a->lineno_cur) == -1)
1061 			break;
1062 
1063 		a->lineno_cur++;
1064 		bline = &a->lines[a->lineno_cur - 1];
1065 	}
1066 done:
1067 	free(line);
1068 	return err;
1069 }
1070 
1071 const struct got_error *
1072 got_output_file_blame(struct request *c, got_render_blame_line_cb cb)
1073 {
1074 	const struct got_error *error = NULL;
1075 	struct transport *t = c->t;
1076 	struct got_repository *repo = t->repo;
1077 	struct querystring *qs = c->t->qs;
1078 	struct got_object_id *obj_id = NULL, *commit_id = NULL;
1079 	struct got_commit_object *commit = NULL;
1080 	struct got_reflist_head refs;
1081 	struct got_blob_object *blob = NULL;
1082 	char *path = NULL, *in_repo_path = NULL;
1083 	struct blame_cb_args bca;
1084 	int i, obj_type, fd1 = -1, fd2 = -1, fd3 = -1, fd4 = -1, fd5 = -1;
1085 	int fd6 = -1;
1086 	off_t filesize;
1087 	FILE *f1 = NULL, *f2 = NULL;
1088 
1089 	TAILQ_INIT(&refs);
1090 	bca.f = NULL;
1091 	bca.lines = NULL;
1092 	bca.cb = cb;
1093 
1094 	if (asprintf(&path, "%s%s%s", qs->folder ? qs->folder : "",
1095 	    qs->folder ? "/" : "", qs->file) == -1) {
1096 		error = got_error_from_errno("asprintf");
1097 		goto done;
1098 	}
1099 
1100 	error = got_repo_map_path(&in_repo_path, repo, path);
1101 	if (error)
1102 		goto done;
1103 
1104 	error = got_repo_match_object_id(&commit_id, NULL, qs->commit,
1105 	    GOT_OBJ_TYPE_COMMIT, &refs, repo);
1106 	if (error)
1107 		goto done;
1108 
1109 	error = got_object_open_as_commit(&commit, repo, commit_id);
1110 	if (error)
1111 		goto done;
1112 
1113 	error = got_object_id_by_path(&obj_id, repo, commit, in_repo_path);
1114 	if (error)
1115 		goto done;
1116 
1117 	error = got_object_get_type(&obj_type, repo, obj_id);
1118 	if (error)
1119 		goto done;
1120 
1121 	if (obj_type != GOT_OBJ_TYPE_BLOB) {
1122 		error = got_error(GOT_ERR_OBJ_TYPE);
1123 		goto done;
1124 	}
1125 
1126 	error = got_gotweb_openfile(&bca.f, &c->priv_fd[BLAME_FD_1], &fd1);
1127 	if (error)
1128 		goto done;
1129 
1130 	error = got_gotweb_dupfd(&c->priv_fd[BLAME_FD_2], &fd2);
1131 	if (error)
1132 		goto done;
1133 
1134 	error = got_object_open_as_blob(&blob, repo, obj_id, BUF, fd2);
1135 	if (error)
1136 		goto done;
1137 
1138 	error = got_object_blob_dump_to_file(&filesize, &bca.nlines,
1139 	    &bca.line_offsets, bca.f, blob);
1140 	if (error || bca.nlines == 0)
1141 		goto done;
1142 
1143 	/* Don't include \n at EOF in the blame line count. */
1144 	if (bca.line_offsets[bca.nlines - 1] == filesize)
1145 		bca.nlines--;
1146 
1147 	bca.lines = calloc(bca.nlines, sizeof(*bca.lines));
1148 	if (bca.lines == NULL) {
1149 		error = got_error_from_errno("calloc");
1150 		goto done;
1151 	}
1152 	bca.lineno_cur = 1;
1153 	bca.nlines_prec = 0;
1154 	i = bca.nlines;
1155 	while (i > 0) {
1156 		i /= 10;
1157 		bca.nlines_prec++;
1158 	}
1159 	bca.repo = repo;
1160 	bca.c = c;
1161 
1162 	error = got_gotweb_dupfd(&c->priv_fd[BLAME_FD_3], &fd3);
1163 	if (error)
1164 		goto done;
1165 
1166 	error = got_gotweb_dupfd(&c->priv_fd[BLAME_FD_4], &fd4);
1167 	if (error)
1168 		goto done;
1169 
1170 	error = got_gotweb_openfile(&f1, &c->priv_fd[BLAME_FD_5], &fd5);
1171 	if (error)
1172 		goto done;
1173 
1174 	error = got_gotweb_openfile(&f2, &c->priv_fd[BLAME_FD_6], &fd6);
1175 	if (error)
1176 		goto done;
1177 
1178 	error = got_blame(in_repo_path, commit_id, repo,
1179 	    GOT_DIFF_ALGORITHM_MYERS, got_gotweb_blame_cb, &bca, NULL, NULL,
1180 	    fd3, fd4, f1, f2);
1181 
1182 done:
1183 	if (bca.lines) {
1184 		free(bca.line_offsets);
1185 		for (i = 0; i < bca.nlines; i++) {
1186 			struct blame_line *bline = &bca.lines[i];
1187 			free(bline->id_str);
1188 			free(bline->committer);
1189 		}
1190 	}
1191 	free(bca.lines);
1192 	if (fd2 != -1 && close(fd2) == -1 && error == NULL)
1193 		error = got_error_from_errno("close");
1194 	if (fd3 != -1 && close(fd3) == -1 && error == NULL)
1195 		error = got_error_from_errno("close");
1196 	if (fd4 != -1 && close(fd4) == -1 && error == NULL)
1197 		error = got_error_from_errno("close");
1198 	if (bca.f) {
1199 		const struct got_error *bca_err =
1200 		    got_gotweb_flushfile(bca.f, fd1);
1201 		if (error == NULL)
1202 			error = bca_err;
1203 	}
1204 	if (f1) {
1205 		const struct got_error *f1_err =
1206 		    got_gotweb_flushfile(f1, fd5);
1207 		if (error == NULL)
1208 			error = f1_err;
1209 	}
1210 	if (f2) {
1211 		const struct got_error *f2_err =
1212 		    got_gotweb_flushfile(f2, fd6);
1213 		if (error == NULL)
1214 			error = f2_err;
1215 	}
1216 	if (commit)
1217 		got_object_commit_close(commit);
1218 	if (blob)
1219 		got_object_blob_close(blob);
1220 	free(in_repo_path);
1221 	free(commit_id);
1222 	free(obj_id);
1223 	free(path);
1224 	got_ref_list_free(&refs);
1225 	return error;
1226 }
1227 
1228 const struct got_error *
1229 got_open_diff_for_output(FILE **fp, int *fd, struct request *c)
1230 {
1231 	const struct got_error *error = NULL;
1232 	struct transport *t = c->t;
1233 	struct got_repository *repo = t->repo;
1234 	struct repo_commit *rc = NULL;
1235 	struct got_object_id *id1 = NULL, *id2 = NULL;
1236 	struct got_reflist_head refs;
1237 	FILE *f1 = NULL, *f2 = NULL, *f3 = NULL;
1238 	int obj_type, fd1, fd2, fd3, fd4 = -1, fd5 = -1;
1239 
1240 	*fp = NULL;
1241 	*fd = -1;
1242 
1243 	TAILQ_INIT(&refs);
1244 
1245 	error = got_gotweb_openfile(&f1, &c->priv_fd[DIFF_FD_1], &fd1);
1246 	if (error)
1247 		return error;
1248 
1249 	error = got_gotweb_openfile(&f2, &c->priv_fd[DIFF_FD_2], &fd2);
1250 	if (error)
1251 		return error;
1252 
1253 	error = got_gotweb_openfile(&f3, &c->priv_fd[DIFF_FD_3], &fd3);
1254 	if (error)
1255 		return error;
1256 
1257 	rc = TAILQ_FIRST(&t->repo_commits);
1258 
1259 	if (rc->parent_id != NULL &&
1260 	    strncmp(rc->parent_id, "/dev/null", 9) != 0) {
1261 		error = got_repo_match_object_id(&id1, NULL,
1262 		    rc->parent_id, GOT_OBJ_TYPE_ANY,
1263 		    &refs, repo);
1264 		if (error)
1265 			goto done;
1266 	}
1267 
1268 	error = got_repo_match_object_id(&id2, NULL, rc->commit_id,
1269 	    GOT_OBJ_TYPE_ANY, &refs, repo);
1270 	if (error)
1271 		goto done;
1272 
1273 	error = got_object_get_type(&obj_type, repo, id2);
1274 	if (error)
1275 		goto done;
1276 
1277 	error = got_gotweb_dupfd(&c->priv_fd[DIFF_FD_4], &fd4);
1278 	if (error)
1279 		goto done;
1280 
1281 	error = got_gotweb_dupfd(&c->priv_fd[DIFF_FD_5], &fd5);
1282 	if (error)
1283 		goto done;
1284 
1285 	switch (obj_type) {
1286 	case GOT_OBJ_TYPE_BLOB:
1287 		error = got_diff_objects_as_blobs(NULL, NULL, f1, f2, fd4, fd5,
1288 		     id1, id2, NULL, NULL, GOT_DIFF_ALGORITHM_MYERS, 3, 0, 0,
1289 		     NULL, repo, f3);
1290 		break;
1291 	case GOT_OBJ_TYPE_TREE:
1292 		error = got_diff_objects_as_trees(NULL, NULL, f1, f2, fd4, fd5,
1293 		    id1, id2, NULL, "", "",  GOT_DIFF_ALGORITHM_MYERS, 3, 0, 0,
1294 		    NULL, repo, f3);
1295 		break;
1296 	case GOT_OBJ_TYPE_COMMIT:
1297 		error = got_diff_objects_as_commits(NULL, NULL, f1, f2, fd4,
1298 		    fd5, id1, id2, NULL,  GOT_DIFF_ALGORITHM_MYERS, 3, 0, 0,
1299 		    NULL, repo, f3);
1300 		break;
1301 	default:
1302 		error = got_error(GOT_ERR_OBJ_TYPE);
1303 	}
1304 	if (error)
1305 		goto done;
1306 
1307 	if (fseek(f1, 0, SEEK_SET) == -1) {
1308 		error = got_ferror(f1, GOT_ERR_IO);
1309 		goto done;
1310 	}
1311 
1312 	if (fseek(f2, 0, SEEK_SET) == -1) {
1313 		error = got_ferror(f2, GOT_ERR_IO);
1314 		goto done;
1315 	}
1316 
1317 	if (fseek(f3, 0, SEEK_SET) == -1) {
1318 		error = got_ferror(f3, GOT_ERR_IO);
1319 		goto done;
1320 	}
1321 
1322 	*fp = f3;
1323 	*fd = fd3;
1324 
1325 done:
1326 	if (fd4 != -1 && close(fd4) == -1 && error == NULL)
1327 		error = got_error_from_errno("close");
1328 	if (fd5 != -1 && close(fd5) == -1 && error == NULL)
1329 		error = got_error_from_errno("close");
1330 	if (f1) {
1331 		const struct got_error *f1_err =
1332 		    got_gotweb_flushfile(f1, fd1);
1333 		if (error == NULL)
1334 			error = f1_err;
1335 	}
1336 	if (f2) {
1337 		const struct got_error *f2_err =
1338 		    got_gotweb_flushfile(f2, fd2);
1339 		if (error == NULL)
1340 			error = f2_err;
1341 	}
1342 	if (error && f3) {
1343 		got_gotweb_flushfile(f3, fd3);
1344 		*fp = NULL;
1345 		*fd = -1;
1346 	}
1347 	got_ref_list_free(&refs);
1348 	free(id1);
1349 	free(id2);
1350 	return error;
1351 }
1352 
1353 static const struct got_error *
1354 got_init_repo_commit(struct repo_commit **rc)
1355 {
1356 	*rc = calloc(1, sizeof(**rc));
1357 	if (*rc == NULL)
1358 		return got_error_from_errno2("%s: calloc", __func__);
1359 
1360 	(*rc)->path = NULL;
1361 	(*rc)->refs_str = NULL;
1362 	(*rc)->commit_id = NULL;
1363 	(*rc)->committer = NULL;
1364 	(*rc)->author = NULL;
1365 	(*rc)->parent_id = NULL;
1366 	(*rc)->tree_id = NULL;
1367 	(*rc)->commit_msg = NULL;
1368 
1369 	return NULL;
1370 }
1371 
1372 static const struct got_error *
1373 got_init_repo_tag(struct repo_tag **rt)
1374 {
1375 	*rt = calloc(1, sizeof(**rt));
1376 	if (*rt == NULL)
1377 		return got_error_from_errno2("%s: calloc", __func__);
1378 
1379 	(*rt)->commit_id = NULL;
1380 	(*rt)->tag_name = NULL;
1381 	(*rt)->tag_commit = NULL;
1382 	(*rt)->commit_msg = NULL;
1383 	(*rt)->tagger = NULL;
1384 
1385 	return NULL;
1386 }