Got Mirror

Blob

Date:: Tue Mar 26 09:35:33 2019 UTC
Message:: add a basic implementation of 'got rm'
Actions:: History | Blame | Raw File
1 /*
2  * Copyright (c) 2018, 2019 Stefan Sperling <stsp@openbsd.org>
3  *
4  * Permission to use, copy, modify, and distribute this software for any
5  * purpose with or without fee is hereby granted, provided that the above
6  * copyright notice and this permission notice appear in all copies.
7  *
8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15  */
16 
17 #include <sys/queue.h>
18 #include <sys/tree.h>
19 #include <sys/stat.h>
20 
21 #include <dirent.h>
22 #include <stdio.h>
23 #include <stdlib.h>
24 #include <string.h>
25 #include <sha1.h>
26 #include <endian.h>
27 #include <limits.h>
28 #include <uuid.h>
29 
30 #include "got_error.h"
31 #include "got_object.h"
32 
33 #include "got_lib_path.h"
34 #include "got_lib_fileindex.h"
35 #include "got_lib_worktree.h"
36 
37 /* got_fileindex_entry flags */
38 #define GOT_FILEIDX_F_PATH_LEN		0x00000fff
39 #define GOT_FILEIDX_F_STAGE		0x00003000
40 #define GOT_FILEIDX_F_EXTENDED		0x00004000
41 #define GOT_FILEIDX_F_ASSUME_VALID	0x00008000
42 #define GOT_FILEIDX_F_NOT_FLUSHED	0x00010000
43 #define GOT_FILEIDX_F_NO_BLOB		0x00020000
44 #define GOT_FILEIDX_F_NO_COMMIT		0x00040000
45 #define GOT_FILEIDX_F_NO_FILE_ON_DISK	0x00080000
46 
47 struct got_fileindex {
48 	struct got_fileindex_tree entries;
49 	int nentries;
50 #define GOT_FILEIDX_MAX_ENTRIES INT_MAX
51 };
52 
53 const struct got_error *
54 got_fileindex_entry_update(struct got_fileindex_entry *entry,
55     const char *ondisk_path, uint8_t *blob_sha1, uint8_t *commit_sha1,
56     int update_timestamps)
57 {
58 	struct stat sb;
59 
60 	if (lstat(ondisk_path, &sb) != 0)
61 		return got_error_from_errno();
62 
63 	entry->flags &= ~GOT_FILEIDX_F_NO_FILE_ON_DISK;
64 
65 	if (update_timestamps) {
66 		entry->ctime_sec = sb.st_ctime;
67 		entry->ctime_nsec = sb.st_ctimensec;
68 		entry->mtime_sec = sb.st_mtime;
69 		entry->mtime_nsec = sb.st_mtimensec;
70 	}
71 	entry->uid = sb.st_uid;
72 	entry->gid = sb.st_gid;
73 	entry->size = (sb.st_size & 0xffffffff);
74 	if (sb.st_mode & S_IFLNK)
75 		entry->mode = GOT_FILEIDX_MODE_SYMLINK;
76 	else
77 		entry->mode = GOT_FILEIDX_MODE_REGULAR_FILE;
78 	entry->mode |= ((sb.st_mode & (S_IRWXU | S_IRWXG | S_IRWXO)) <<
79 	    GOT_FILEIDX_MODE_PERMS_SHIFT);
80 
81 	if (blob_sha1) {
82 		memcpy(entry->blob_sha1, blob_sha1, SHA1_DIGEST_LENGTH);
83 		entry->flags &= ~GOT_FILEIDX_F_NO_BLOB;
84 	} else
85 		entry->flags |= GOT_FILEIDX_F_NO_BLOB;
86 
87 	if (commit_sha1) {
88 		memcpy(entry->commit_sha1, commit_sha1, SHA1_DIGEST_LENGTH);
89 		entry->flags &= ~GOT_FILEIDX_F_NO_COMMIT;
90 	} else
91 		entry->flags |= GOT_FILEIDX_F_NO_COMMIT;
92 
93 	return NULL;
94 }
95 
96 void
97 got_fileindex_entry_mark_deleted_from_disk(struct got_fileindex_entry *entry)
98 {
99 	entry->flags |= GOT_FILEIDX_F_NO_FILE_ON_DISK;
100 }
101 
102 const struct got_error *
103 got_fileindex_entry_alloc(struct got_fileindex_entry **entry,
104     const char *ondisk_path, const char *relpath, uint8_t *blob_sha1,
105     uint8_t *commit_sha1)
106 {
107 	size_t len;
108 
109 	*entry = calloc(1, sizeof(**entry));
110 	if (*entry == NULL)
111 		return got_error_from_errno();
112 
113 	(*entry)->path = strdup(relpath);
114 	if ((*entry)->path == NULL) {
115 		const struct got_error *err = got_error_from_errno();
116 		free(*entry);
117 		*entry = NULL;
118 		return err;
119 	}
120 
121 	len = strlen(relpath);
122 	if (len > GOT_FILEIDX_F_PATH_LEN)
123 		len = GOT_FILEIDX_F_PATH_LEN;
124 	(*entry)->flags |= len;
125 
126 	return got_fileindex_entry_update(*entry, ondisk_path, blob_sha1,
127 	    commit_sha1, 1);
128 }
129 
130 void
131 got_fileindex_entry_free(struct got_fileindex_entry *entry)
132 {
133 	free(entry->path);
134 	free(entry);
135 }
136 
137 int
138 got_fileindex_entry_has_blob(struct got_fileindex_entry *ie)
139 {
140 	return (ie->flags & GOT_FILEIDX_F_NO_BLOB) == 0;
141 }
142 
143 int
144 got_fileindex_entry_has_commit(struct got_fileindex_entry *ie)
145 {
146 	return (ie->flags & GOT_FILEIDX_F_NO_COMMIT) == 0;
147 }
148 
149 int
150 got_fileindex_entry_has_file_on_disk(struct got_fileindex_entry *ie)
151 {
152 	return (ie->flags & GOT_FILEIDX_F_NO_FILE_ON_DISK) == 0;
153 }
154 
155 static const struct got_error *
156 add_entry(struct got_fileindex *fileindex, struct got_fileindex_entry *entry)
157 {
158 	if (fileindex->nentries >= GOT_FILEIDX_MAX_ENTRIES)
159 		return got_error(GOT_ERR_NO_SPACE);
160 
161 	RB_INSERT(got_fileindex_tree, &fileindex->entries, entry);
162 	fileindex->nentries++;
163 	return NULL;
164 }
165 
166 const struct got_error *
167 got_fileindex_entry_add(struct got_fileindex *fileindex,
168     struct got_fileindex_entry *entry)
169 {
170 	/* Flag this entry until it gets written out to disk. */
171 	entry->flags |= GOT_FILEIDX_F_NOT_FLUSHED;
172 
173 	return add_entry(fileindex, entry);
174 }
175 
176 void
177 got_fileindex_entry_remove(struct got_fileindex *fileindex,
178     struct got_fileindex_entry *entry)
179 {
180 	RB_REMOVE(got_fileindex_tree, &fileindex->entries, entry);
181 	fileindex->nentries--;
182 }
183 
184 struct got_fileindex_entry *
185 got_fileindex_entry_get(struct got_fileindex *fileindex, const char *path)
186 {
187 	struct got_fileindex_entry key;
188 	memset(&key, 0, sizeof(key));
189 	key.path = (char *)path;
190 	return RB_FIND(got_fileindex_tree, &fileindex->entries, &key);
191 }
192 
193 const struct got_error *
194 got_fileindex_for_each_entry_safe(struct got_fileindex *fileindex,
195     got_fileindex_cb cb, void *cb_arg)
196 {
197 	const struct got_error *err;
198 	struct got_fileindex_entry *entry, *tmp;
199 
200 	RB_FOREACH_SAFE(entry, got_fileindex_tree, &fileindex->entries, tmp) {
201 		err = (*cb)(cb_arg, entry);
202 		if (err)
203 			return err;
204 	}
205 	return NULL;
206 }
207 
208 struct got_fileindex *
209 got_fileindex_alloc(void)
210 {
211 	struct got_fileindex *fileindex;
212 
213 	fileindex = calloc(1, sizeof(*fileindex));
214 	if (fileindex == NULL)
215 		return NULL;
216 
217 	RB_INIT(&fileindex->entries);
218 	return fileindex;
219 }
220 
221 void
222 got_fileindex_free(struct got_fileindex *fileindex)
223 {
224 	struct got_fileindex_entry *entry;
225 
226 	while ((entry = RB_MIN(got_fileindex_tree, &fileindex->entries))) {
227 		RB_REMOVE(got_fileindex_tree, &fileindex->entries, entry);
228 		got_fileindex_entry_free(entry);
229 	}
230 	free(fileindex);
231 }
232 
233 static const struct got_error *
234 write_fileindex_val64(SHA1_CTX *ctx, uint64_t val, FILE *outfile)
235 {
236 	size_t n;
237 
238 	val = htobe64(val);
239 	SHA1Update(ctx, (uint8_t *)&val, sizeof(val));
240 	n = fwrite(&val, 1, sizeof(val), outfile);
241 	if (n != sizeof(val))
242 		return got_ferror(outfile, GOT_ERR_IO);
243 	return NULL;
244 }
245 
246 static const struct got_error *
247 write_fileindex_val32(SHA1_CTX *ctx, uint32_t val, FILE *outfile)
248 {
249 	size_t n;
250 
251 	val = htobe32(val);
252 	SHA1Update(ctx, (uint8_t *)&val, sizeof(val));
253 	n = fwrite(&val, 1, sizeof(val), outfile);
254 	if (n != sizeof(val))
255 		return got_ferror(outfile, GOT_ERR_IO);
256 	return NULL;
257 }
258 
259 static const struct got_error *
260 write_fileindex_val16(SHA1_CTX *ctx, uint16_t val, FILE *outfile)
261 {
262 	size_t n;
263 
264 	val = htobe16(val);
265 	SHA1Update(ctx, (uint8_t *)&val, sizeof(val));
266 	n = fwrite(&val, 1, sizeof(val), outfile);
267 	if (n != sizeof(val))
268 		return got_ferror(outfile, GOT_ERR_IO);
269 	return NULL;
270 }
271 
272 static const struct got_error *
273 write_fileindex_path(SHA1_CTX *ctx, const char *path, FILE *outfile)
274 {
275 	size_t n, len, pad = 0;
276 	static const uint8_t zero[8] = { 0 };
277 
278 	len = strlen(path);
279 	while ((len + pad) % 8 != 0)
280 		pad++;
281 	if (pad == 0)
282 		pad = 8; /* NUL-terminate */
283 
284 	SHA1Update(ctx, path, len);
285 	n = fwrite(path, 1, len, outfile);
286 	if (n != len)
287 		return got_ferror(outfile, GOT_ERR_IO);
288 	SHA1Update(ctx, zero, pad);
289 	n = fwrite(zero, 1, pad, outfile);
290 	if (n != pad)
291 		return got_ferror(outfile, GOT_ERR_IO);
292 	return NULL;
293 }
294 
295 static const struct got_error *
296 write_fileindex_entry(SHA1_CTX *ctx, struct got_fileindex_entry *entry,
297     FILE *outfile)
298 {
299 	const struct got_error *err;
300 	size_t n;
301 
302 	err = write_fileindex_val64(ctx, entry->ctime_sec, outfile);
303 	if (err)
304 		return err;
305 	err = write_fileindex_val64(ctx, entry->ctime_nsec, outfile);
306 	if (err)
307 		return err;
308 	err = write_fileindex_val64(ctx, entry->mtime_sec, outfile);
309 	if (err)
310 		return err;
311 	err = write_fileindex_val64(ctx, entry->mtime_nsec, outfile);
312 	if (err)
313 		return err;
314 
315 	err = write_fileindex_val32(ctx, entry->uid, outfile);
316 	if (err)
317 		return err;
318 	err = write_fileindex_val32(ctx, entry->gid, outfile);
319 	if (err)
320 		return err;
321 	err = write_fileindex_val32(ctx, entry->size, outfile);
322 	if (err)
323 		return err;
324 
325 	err = write_fileindex_val16(ctx, entry->mode, outfile);
326 	if (err)
327 		return err;
328 
329 	SHA1Update(ctx, entry->blob_sha1, SHA1_DIGEST_LENGTH);
330 	n = fwrite(entry->blob_sha1, 1, SHA1_DIGEST_LENGTH, outfile);
331 	if (n != SHA1_DIGEST_LENGTH)
332 		return got_ferror(outfile, GOT_ERR_IO);
333 
334 	SHA1Update(ctx, entry->commit_sha1, SHA1_DIGEST_LENGTH);
335 	n = fwrite(entry->commit_sha1, 1, SHA1_DIGEST_LENGTH, outfile);
336 	if (n != SHA1_DIGEST_LENGTH)
337 		return got_ferror(outfile, GOT_ERR_IO);
338 
339 	err = write_fileindex_val32(ctx, entry->flags, outfile);
340 	if (err)
341 		return err;
342 
343 	err = write_fileindex_path(ctx, entry->path, outfile);
344 	return err;
345 }
346 
347 const struct got_error *
348 got_fileindex_write(struct got_fileindex *fileindex, FILE *outfile)
349 {
350 	const struct got_error *err = NULL;
351 	struct got_fileindex_hdr hdr;
352 	SHA1_CTX ctx;
353 	uint8_t sha1[SHA1_DIGEST_LENGTH];
354 	size_t n;
355 	struct got_fileindex_entry *entry;
356 
357 	SHA1Init(&ctx);
358 
359 	hdr.signature = htobe32(GOT_FILE_INDEX_SIGNATURE);
360 	hdr.version = htobe32(GOT_FILE_INDEX_VERSION);
361 	hdr.nentries = htobe32(fileindex->nentries);
362 
363 	SHA1Update(&ctx, (uint8_t *)&hdr.signature, sizeof(hdr.signature));
364 	SHA1Update(&ctx, (uint8_t *)&hdr.version, sizeof(hdr.version));
365 	SHA1Update(&ctx, (uint8_t *)&hdr.nentries, sizeof(hdr.nentries));
366 	n = fwrite(&hdr.signature, 1, sizeof(hdr.signature), outfile);
367 	if (n != sizeof(hdr.signature))
368 		return got_ferror(outfile, GOT_ERR_IO);
369 	n = fwrite(&hdr.version, 1, sizeof(hdr.version), outfile);
370 	if (n != sizeof(hdr.version))
371 		return got_ferror(outfile, GOT_ERR_IO);
372 	n = fwrite(&hdr.nentries, 1, sizeof(hdr.nentries), outfile);
373 	if (n != sizeof(hdr.nentries))
374 		return got_ferror(outfile, GOT_ERR_IO);
375 
376 	RB_FOREACH(entry, got_fileindex_tree, &fileindex->entries) {
377 		entry->flags &= ~GOT_FILEIDX_F_NOT_FLUSHED;
378 		err = write_fileindex_entry(&ctx, entry, outfile);
379 		if (err)
380 			return err;
381 	}
382 
383 	SHA1Final(sha1, &ctx);
384 	n = fwrite(sha1, 1, sizeof(sha1), outfile);
385 	if (n != sizeof(sha1))
386 		return got_ferror(outfile, GOT_ERR_IO);
387 
388 	if (fflush(outfile) != 0)
389 		return got_error_from_errno();
390 
391 	return NULL;
392 }
393 
394 static const struct got_error *
395 read_fileindex_val64(uint64_t *val, SHA1_CTX *ctx, FILE *infile)
396 {
397 	size_t n;
398 
399 	n = fread(val, 1, sizeof(*val), infile);
400 	if (n != sizeof(*val))
401 		return got_ferror(infile, GOT_ERR_FILEIDX_BAD);
402 	SHA1Update(ctx, (uint8_t *)val, sizeof(*val));
403 	*val = be64toh(*val);
404 	return NULL;
405 }
406 
407 static const struct got_error *
408 read_fileindex_val32(uint32_t *val, SHA1_CTX *ctx, FILE *infile)
409 {
410 	size_t n;
411 
412 	n = fread(val, 1, sizeof(*val), infile);
413 	if (n != sizeof(*val))
414 		return got_ferror(infile, GOT_ERR_FILEIDX_BAD);
415 	SHA1Update(ctx, (uint8_t *)val, sizeof(*val));
416 	*val = be32toh(*val);
417 	return NULL;
418 }
419 
420 static const struct got_error *
421 read_fileindex_val16(uint16_t *val, SHA1_CTX *ctx, FILE *infile)
422 {
423 	size_t n;
424 
425 	n = fread(val, 1, sizeof(*val), infile);
426 	if (n != sizeof(*val))
427 		return got_ferror(infile, GOT_ERR_FILEIDX_BAD);
428 	SHA1Update(ctx, (uint8_t *)val, sizeof(*val));
429 	*val = be16toh(*val);
430 	return NULL;
431 }
432 
433 static const struct got_error *
434 read_fileindex_path(char **path, SHA1_CTX *ctx, FILE *infile)
435 {
436 	const struct got_error *err = NULL;
437 	uint8_t buf[8];
438 	size_t n, len = 0, totlen = sizeof(buf);
439 
440 	*path = malloc(totlen);
441 	if (*path == NULL)
442 		return got_error_from_errno();
443 
444 	do {
445 		n = fread(buf, 1, sizeof(buf), infile);
446 		if (n != sizeof(buf))
447 			return got_ferror(infile, GOT_ERR_FILEIDX_BAD);
448 		if (len + sizeof(buf) > totlen) {
449 			char *p = reallocarray(*path, totlen + sizeof(buf), 1);
450 			if (p == NULL) {
451 				err = got_error_from_errno();
452 				break;
453 			}
454 			totlen += sizeof(buf);
455 			*path = p;
456 		}
457 		SHA1Update(ctx, buf, sizeof(buf));
458 		memcpy(*path + len, buf, sizeof(buf));
459 		len += sizeof(buf);
460 	} while (memchr(buf, '\0', sizeof(buf)) == NULL);
461 
462 	if (err) {
463 		free(*path);
464 		*path = NULL;
465 	}
466 	return err;
467 }
468 
469 static const struct got_error *
470 read_fileindex_entry(struct got_fileindex_entry **entryp, SHA1_CTX *ctx,
471     FILE *infile)
472 {
473 	const struct got_error *err;
474 	struct got_fileindex_entry *entry;
475 	size_t n;
476 
477 	*entryp = NULL;
478 
479 	entry = calloc(1, sizeof(*entry));
480 	if (entry == NULL)
481 		return got_error_from_errno();
482 
483 	err = read_fileindex_val64(&entry->ctime_sec, ctx, infile);
484 	if (err)
485 		goto done;
486 	err = read_fileindex_val64(&entry->ctime_nsec, ctx, infile);
487 	if (err)
488 		goto done;
489 	err = read_fileindex_val64(&entry->mtime_sec, ctx, infile);
490 	if (err)
491 		goto done;
492 	err = read_fileindex_val64(&entry->mtime_nsec, ctx, infile);
493 	if (err)
494 		goto done;
495 
496 	err = read_fileindex_val32(&entry->uid, ctx, infile);
497 	if (err)
498 		goto done;
499 	err = read_fileindex_val32(&entry->gid, ctx, infile);
500 	if (err)
501 		goto done;
502 	err = read_fileindex_val32(&entry->size, ctx, infile);
503 	if (err)
504 		goto done;
505 
506 	err = read_fileindex_val16(&entry->mode, ctx, infile);
507 	if (err)
508 		goto done;
509 
510 	n = fread(entry->blob_sha1, 1, SHA1_DIGEST_LENGTH, infile);
511 	if (n != SHA1_DIGEST_LENGTH) {
512 		err = got_ferror(infile, GOT_ERR_FILEIDX_BAD);
513 		goto done;
514 	}
515 	SHA1Update(ctx, entry->blob_sha1, SHA1_DIGEST_LENGTH);
516 
517 	n = fread(entry->commit_sha1, 1, SHA1_DIGEST_LENGTH, infile);
518 	if (n != SHA1_DIGEST_LENGTH) {
519 		err = got_ferror(infile, GOT_ERR_FILEIDX_BAD);
520 		goto done;
521 	}
522 	SHA1Update(ctx, entry->commit_sha1, SHA1_DIGEST_LENGTH);
523 
524 	err = read_fileindex_val32(&entry->flags, ctx, infile);
525 	if (err)
526 		goto done;
527 
528 	err = read_fileindex_path(&entry->path, ctx, infile);
529 done:
530 	if (err)
531 		free(entry);
532 	else
533 		*entryp = entry;
534 	return err;
535 }
536 
537 const struct got_error *
538 got_fileindex_read(struct got_fileindex *fileindex, FILE *infile)
539 {
540 	const struct got_error *err = NULL;
541 	struct got_fileindex_hdr hdr;
542 	SHA1_CTX ctx;
543 	struct got_fileindex_entry *entry;
544 	uint8_t sha1_expected[SHA1_DIGEST_LENGTH];
545 	uint8_t sha1[SHA1_DIGEST_LENGTH];
546 	size_t n;
547 	int i;
548 
549 	SHA1Init(&ctx);
550 
551 	n = fread(&hdr.signature, 1, sizeof(hdr.signature), infile);
552 	if (n != sizeof(hdr.signature)) {
553 		if (n == 0) /* EOF */
554 			return NULL;
555 		return got_ferror(infile, GOT_ERR_FILEIDX_BAD);
556 	}
557 	n = fread(&hdr.version, 1, sizeof(hdr.version), infile);
558 	if (n != sizeof(hdr.version)) {
559 		if (n == 0) /* EOF */
560 			return NULL;
561 		return got_ferror(infile, GOT_ERR_FILEIDX_BAD);
562 	}
563 	n = fread(&hdr.nentries, 1, sizeof(hdr.nentries), infile);
564 	if (n != sizeof(hdr.nentries)) {
565 		if (n == 0) /* EOF */
566 			return NULL;
567 		return got_ferror(infile, GOT_ERR_FILEIDX_BAD);
568 	}
569 
570 	SHA1Update(&ctx, (uint8_t *)&hdr.signature, sizeof(hdr.signature));
571 	SHA1Update(&ctx, (uint8_t *)&hdr.version, sizeof(hdr.version));
572 	SHA1Update(&ctx, (uint8_t *)&hdr.nentries, sizeof(hdr.nentries));
573 
574 	hdr.signature = be32toh(hdr.signature);
575 	hdr.version = be32toh(hdr.version);
576 	hdr.nentries = be32toh(hdr.nentries);
577 
578 	if (hdr.signature != GOT_FILE_INDEX_SIGNATURE)
579 		return got_error(GOT_ERR_FILEIDX_SIG);
580 	if (hdr.version != GOT_FILE_INDEX_VERSION)
581 		return got_error(GOT_ERR_FILEIDX_VER);
582 
583 	for (i = 0; i < hdr.nentries; i++) {
584 		err = read_fileindex_entry(&entry, &ctx, infile);
585 		if (err)
586 			return err;
587 		err = add_entry(fileindex, entry);
588 		if (err)
589 			return err;
590 	}
591 
592 	n = fread(sha1_expected, 1, sizeof(sha1_expected), infile);
593 	if (n != sizeof(sha1_expected))
594 		return got_ferror(infile, GOT_ERR_FILEIDX_BAD);
595 	SHA1Final(sha1, &ctx);
596 	if (memcmp(sha1, sha1_expected, SHA1_DIGEST_LENGTH) != 0)
597 		return got_error(GOT_ERR_FILEIDX_CSUM);
598 
599 	return NULL;
600 }
601 
602 static struct got_fileindex_entry *
603 walk_fileindex(struct got_fileindex *fileindex, struct got_fileindex_entry *ie)
604 {
605 	struct got_fileindex_entry *next;
606 
607 	next = RB_NEXT(got_fileindex_tree, &fileindex->entries, ie);
608 
609 	/* Skip entries which were newly added by diff callbacks. */
610 	while (next && (next->flags & GOT_FILEIDX_F_NOT_FLUSHED))
611 		next = RB_NEXT(got_fileindex_tree, &fileindex->entries, next);
612 
613 	return next;
614 }
615 
616 static const struct got_error *
617 diff_fileindex_tree(struct got_fileindex *, struct got_fileindex_entry **,
618     struct got_tree_object *, const char *, struct got_repository *,
619     struct got_fileindex_diff_tree_cb *, void *);
620 
621 static const struct got_error *
622 walk_tree(struct got_tree_entry **next, struct got_fileindex *fileindex,
623     struct got_fileindex_entry **ie, struct got_tree_entry *te,
624     const char *path, struct got_repository *repo,
625     struct got_fileindex_diff_tree_cb *cb, void *cb_arg)
626 {
627 	const struct got_error *err = NULL;
628 
629 	if (S_ISDIR(te->mode)) {
630 		char *subpath;
631 		struct got_tree_object *subtree;
632 
633 		if (asprintf(&subpath, "%s%s%s", path,
634 		    path[0] == '\0' ? "" : "/", te->name) == -1)
635 			return got_error_from_errno();
636 
637 		err = got_object_open_as_tree(&subtree, repo, te->id);
638 		if (err) {
639 			free(subpath);
640 			return err;
641 		}
642 
643 		err = diff_fileindex_tree(fileindex, ie, subtree,
644 		    subpath, repo, cb, cb_arg);
645 		free(subpath);
646 		got_object_tree_close(subtree);
647 		if (err)
648 			return err;
649 	}
650 
651 	*next = SIMPLEQ_NEXT(te, entry);
652 	return NULL;
653 }
654 
655 static const struct got_error *
656 diff_fileindex_tree(struct got_fileindex *fileindex,
657     struct got_fileindex_entry **ie, struct got_tree_object *tree,
658     const char *path, struct got_repository *repo,
659     struct got_fileindex_diff_tree_cb *cb, void *cb_arg)
660 {
661 	const struct got_error *err = NULL;
662 	struct got_tree_entry *te = NULL;
663 	size_t path_len = strlen(path);
664 	const struct got_tree_entries *entries;
665 	struct got_fileindex_entry *next;
666 
667 	entries = got_object_tree_get_entries(tree);
668 	te = SIMPLEQ_FIRST(&entries->head);
669 	while ((*ie && got_path_is_child((*ie)->path, path, path_len)) || te) {
670 		if (te && *ie) {
671 			char *te_path;
672 			int cmp;
673 			if (asprintf(&te_path, "%s/%s", path, te->name) == -1) {
674 				err = got_error_from_errno();
675 				break;
676 			}
677 			cmp = got_path_cmp((*ie)->path, te_path);
678 			free(te_path);
679 			if (cmp == 0) {
680 				err = cb->diff_old_new(cb_arg, *ie, te,
681 				    path);
682 				if (err)
683 					break;
684 				*ie = walk_fileindex(fileindex, *ie);
685 				err = walk_tree(&te, fileindex, ie, te,
686 				    path, repo, cb, cb_arg);
687 			} else if (cmp < 0 ) {
688 				next = walk_fileindex(fileindex, *ie);
689 				err = cb->diff_old(cb_arg, *ie, path);
690 				if (err)
691 					break;
692 				*ie = next;
693 			} else {
694 				err = cb->diff_new(cb_arg, te, path);
695 				if (err)
696 					break;
697 				err = walk_tree(&te, fileindex, ie, te,
698 				    path, repo, cb, cb_arg);
699 			}
700 			if (err)
701 				break;
702 		} else if (*ie) {
703 			next = walk_fileindex(fileindex, *ie);
704 			err = cb->diff_old(cb_arg, *ie, path);
705 			if (err)
706 				break;
707 			*ie = next;
708 		} else if (te) {
709 			err = cb->diff_new(cb_arg, te, path);
710 			if (err)
711 				break;
712 			err = walk_tree(&te, fileindex, ie, te, path, repo, cb,
713 			    cb_arg);
714 			if (err)
715 				break;
716 		}
717 	}
718 
719 	return err;
720 }
721 
722 const struct got_error *
723 got_fileindex_diff_tree(struct got_fileindex *fileindex,
724     struct got_tree_object *tree, struct got_repository *repo,
725     struct got_fileindex_diff_tree_cb *cb, void *cb_arg)
726 {
727 	struct got_fileindex_entry *min;
728 	min = RB_MIN(got_fileindex_tree, &fileindex->entries);
729 	return diff_fileindex_tree(fileindex, &min, tree, "", repo, cb, cb_arg);
730 }
731 
732 static const struct got_error *
733 diff_fileindex_dir(struct got_fileindex *, struct got_fileindex_entry **, DIR *,
734     const char *, const char *, struct got_repository *,
735     struct got_fileindex_diff_dir_cb *, void *);
736 
737 static const struct got_error *
738 walk_dir(struct got_pathlist_entry **next, struct got_fileindex *fileindex,
739     struct got_fileindex_entry **ie, struct got_pathlist_entry *dle,
740     const char *path, DIR *dir, const char *rootpath,
741     struct got_repository *repo, struct got_fileindex_diff_dir_cb *cb,
742     void *cb_arg)
743 {
744 	const struct got_error *err = NULL;
745 	struct dirent *de = dle->data;
746 
747 	if (de->d_type == DT_DIR) {
748 		char *subpath;
749 		char *subdirpath;
750 		DIR *subdir;
751 
752 		if (asprintf(&subpath, "%s%s%s", path,
753 		    path[0] == '\0' ? "" : "/", de->d_name) == -1)
754 			return got_error_from_errno();
755 
756 		if (asprintf(&subdirpath, "%s/%s", rootpath, subpath) == -1) {
757 			free(subpath);
758 			return got_error_from_errno();
759 		}
760 
761 		subdir = opendir(subdirpath);
762 		if (subdir == NULL) {
763 			free(subpath);
764 			free(subdirpath);
765 			return got_error_from_errno();
766 		}
767 
768 		err = diff_fileindex_dir(fileindex, ie, subdir, rootpath,
769 		    subpath, repo, cb, cb_arg);
770 		free(subpath);
771 		free(subdirpath);
772 		closedir(subdir);
773 		if (err)
774 			return err;
775 	}
776 
777 	*next = TAILQ_NEXT(dle, entry);
778 	return NULL;
779 }
780 
781 static const struct got_error *
782 diff_fileindex_dir(struct got_fileindex *fileindex,
783     struct got_fileindex_entry **ie, DIR *dir, const char *rootpath,
784     const char *path, struct got_repository *repo,
785     struct got_fileindex_diff_dir_cb *cb, void *cb_arg)
786 {
787 	const struct got_error *err = NULL;
788 	struct dirent *de = NULL;
789 	size_t path_len = strlen(path);
790 	struct got_fileindex_entry *next;
791 	struct got_pathlist_head dirlist;
792 	struct got_pathlist_entry *dle;
793 
794 	TAILQ_INIT(&dirlist);
795 
796 	while (1) {
797 		struct got_pathlist_entry *new = NULL;
798 		struct dirent *dep = NULL;
799 
800 		de = malloc(sizeof(struct dirent) + NAME_MAX + 1);
801 		if (de == NULL) {
802 			err = got_error_from_errno();
803 			goto done;
804 		}
805 
806 		if (readdir_r(dir, de, &dep) != 0) {
807 			err = got_error_from_errno();
808 			free(de);
809 			goto done;
810 		}
811 		if (dep == NULL) {
812 			free(de);
813 			break;
814 		}
815 
816 		if (strcmp(de->d_name, ".") == 0 ||
817 		    strcmp(de->d_name, "..") == 0 ||
818 		    (path[0] == '\0' &&
819 		    strcmp(de->d_name, GOT_WORKTREE_GOT_DIR) == 0)) {
820 			free(de);
821 			continue;
822 		}
823 
824 		err = got_pathlist_insert(&new, &dirlist, de->d_name, de);
825 		if (err)
826 			goto done;
827 		if (new == NULL) {
828 			err = got_error(GOT_ERR_DIR_DUP_ENTRY);
829 			goto done;
830 		}
831 	}
832 
833 	dle = TAILQ_FIRST(&dirlist);
834 	while ((*ie && got_path_is_child((*ie)->path, path, path_len)) || dle) {
835 		if (dle && *ie) {
836 			char *de_path;
837 			int cmp;
838 			de = dle->data;
839 			if (asprintf(&de_path, "%s/%s", path,
840 			    de->d_name) == -1) {
841 				err = got_error_from_errno();
842 				break;
843 			}
844 			cmp = got_path_cmp((*ie)->path, de_path);
845 			free(de_path);
846 			if (cmp == 0) {
847 				err = cb->diff_old_new(cb_arg, *ie, de, path);
848 				if (err)
849 					break;
850 				*ie = walk_fileindex(fileindex, *ie);
851 				err = walk_dir(&dle, fileindex, ie, dle, path,
852 				    dir, rootpath, repo, cb, cb_arg);
853 			} else if (cmp < 0 ) {
854 				next = walk_fileindex(fileindex, *ie);
855 				err = cb->diff_old(cb_arg, *ie, path);
856 				if (err)
857 					break;
858 				*ie = next;
859 			} else {
860 				err = cb->diff_new(cb_arg, de, path);
861 				if (err)
862 					break;
863 				err = walk_dir(&dle, fileindex, ie, dle, path,
864 				    dir, rootpath, repo, cb, cb_arg);
865 			}
866 			if (err)
867 				break;
868 		} else if (*ie) {
869 			next = walk_fileindex(fileindex, *ie);
870 			err = cb->diff_old(cb_arg, *ie, path);
871 			if (err)
872 				break;
873 			*ie = next;
874 		} else if (dle) {
875 			de = dle->data;
876 			err = cb->diff_new(cb_arg, de, path);
877 			if (err)
878 				break;
879 			err = walk_dir(&dle, fileindex, ie, dle, path, dir,
880 			    rootpath, repo, cb, cb_arg);
881 			if (err)
882 				break;
883 		}
884 	}
885 done:
886 	TAILQ_FOREACH(dle, &dirlist, entry)
887 		free(dle->data);
888 	got_pathlist_free(&dirlist);
889 	return err;
890 }
891 
892 const struct got_error *
893 got_fileindex_diff_dir(struct got_fileindex *fileindex, DIR *rootdir,
894     const char *rootpath, const char *path, struct got_repository *repo,
895     struct got_fileindex_diff_dir_cb *cb, void *cb_arg)
896 {
897 	struct got_fileindex_entry *min;
898 	min = RB_MIN(got_fileindex_tree, &fileindex->entries);
899 	return diff_fileindex_dir(fileindex, &min, rootdir, rootpath, path,
900 	    repo, cb, cb_arg);
901 }
902 
903 RB_GENERATE(got_fileindex_tree, got_fileindex_entry, entry, got_fileindex_cmp);