2 7d283eee 2017-11-29 stsp * Copyright (c) 2017 Stefan Sperling <stsp@openbsd.org>
4 7d283eee 2017-11-29 stsp * Permission to use, copy, modify, and distribute this software for any
5 7d283eee 2017-11-29 stsp * purpose with or without fee is hereby granted, provided that the above
6 7d283eee 2017-11-29 stsp * copyright notice and this permission notice appear in all copies.
8 7d283eee 2017-11-29 stsp * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 7d283eee 2017-11-29 stsp * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 7d283eee 2017-11-29 stsp * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 7d283eee 2017-11-29 stsp * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 7d283eee 2017-11-29 stsp * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 7d283eee 2017-11-29 stsp * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 7d283eee 2017-11-29 stsp * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 7d283eee 2017-11-29 stsp #include <sys/queue.h>
18 1c7f0520 2017-11-29 stsp #include <sys/stat.h>
20 7d283eee 2017-11-29 stsp #include <stdio.h>
21 7d283eee 2017-11-29 stsp #include <stdlib.h>
22 7d283eee 2017-11-29 stsp #include <string.h>
23 f9d67749 2017-11-30 stsp #include <limits.h>
24 7d283eee 2017-11-29 stsp #include <sha1.h>
25 7d283eee 2017-11-29 stsp #include <zlib.h>
27 7d283eee 2017-11-29 stsp #include "got_repository.h"
28 7d283eee 2017-11-29 stsp #include "got_object.h"
29 7d283eee 2017-11-29 stsp #include "got_error.h"
30 789689b5 2017-11-30 stsp #include "got_diff.h"
32 32cb896c 2018-03-11 stsp #include "got_diff_lib.h"
33 32cb896c 2018-03-11 stsp #include "got_path_lib.h"
35 7d283eee 2017-11-29 stsp const struct got_error *
36 7d283eee 2017-11-29 stsp got_diff_blob(struct got_blob_object *blob1, struct got_blob_object *blob2,
37 474b4f94 2017-11-30 stsp const char *label1, const char *label2, FILE *outfile)
39 ed9e98a8 2017-11-29 stsp struct got_diff_state ds;
40 8ba9a219 2017-11-29 stsp struct got_diff_args args;
41 7d283eee 2017-11-29 stsp const struct got_error *err = NULL;
42 4e22badc 2017-11-30 stsp FILE *f1 = NULL, *f2 = NULL;
43 f78b0693 2017-11-29 stsp char hex1[SHA1_DIGEST_STRING_LENGTH];
44 f78b0693 2017-11-29 stsp char hex2[SHA1_DIGEST_STRING_LENGTH];
45 98abbc84 2017-11-30 stsp char *idstr1 = NULL, *idstr2 = NULL;
46 f9d67749 2017-11-30 stsp size_t len, hdrlen;
47 f934cf2c 2018-02-12 stsp size_t size1, size2;
48 4e22badc 2017-11-30 stsp int res, flags = 0;
50 4e22badc 2017-11-30 stsp if (blob1) {
51 a1fd68d8 2018-01-12 stsp f1 = got_opentemp();
52 4e22badc 2017-11-30 stsp if (f1 == NULL)
53 4e22badc 2017-11-30 stsp return got_error(GOT_ERR_FILE_OPEN);
55 4e22badc 2017-11-30 stsp flags |= D_EMPTY1;
57 4e22badc 2017-11-30 stsp if (blob2) {
58 a1fd68d8 2018-01-12 stsp f2 = got_opentemp();
59 4e22badc 2017-11-30 stsp if (f2 == NULL) {
61 4e22badc 2017-11-30 stsp return got_error(GOT_ERR_FILE_OPEN);
64 4e22badc 2017-11-30 stsp flags |= D_EMPTY2;
67 98abbc84 2017-11-30 stsp if (blob1) {
68 f934cf2c 2018-02-12 stsp idstr1 = got_object_blob_id_str(blob1, hex1, sizeof(hex1));
69 f934cf2c 2018-02-12 stsp hdrlen = got_object_blob_get_hdrlen(blob1);
71 eb651edf 2018-02-11 stsp err = got_object_blob_read_block(&len, blob1);
74 eba5c6bb 2018-02-11 stsp if (len == 0)
76 f934cf2c 2018-02-12 stsp size1 += len;
77 4e22badc 2017-11-30 stsp /* Skip blob object header first time around. */
78 f934cf2c 2018-02-12 stsp fwrite(got_object_blob_get_read_buf(blob1) + hdrlen, len - hdrlen, 1, f1);
80 4e22badc 2017-11-30 stsp } while (len != 0);
82 98abbc84 2017-11-30 stsp idstr1 = "/dev/null";
85 98abbc84 2017-11-30 stsp if (blob2) {
86 f934cf2c 2018-02-12 stsp idstr2 = got_object_blob_id_str(blob2, hex2, sizeof(hex2));
87 f934cf2c 2018-02-12 stsp hdrlen = got_object_blob_get_hdrlen(blob2);
89 eb651edf 2018-02-11 stsp err = got_object_blob_read_block(&len, blob2);
92 eba5c6bb 2018-02-11 stsp if (len == 0)
94 f934cf2c 2018-02-12 stsp size2 += len;
95 98abbc84 2017-11-30 stsp /* Skip blob object header first time around. */
96 f934cf2c 2018-02-12 stsp fwrite(got_object_blob_get_read_buf(blob2) + hdrlen, len - hdrlen, 1, f2);
98 98abbc84 2017-11-30 stsp } while (len != 0);
100 98abbc84 2017-11-30 stsp idstr2 = "/dev/null";
103 eba5c6bb 2018-02-11 stsp fflush(f1);
104 eba5c6bb 2018-02-11 stsp rewind(f1);
107 98abbc84 2017-11-30 stsp fflush(f2);
108 eba5c6bb 2018-02-11 stsp rewind(f2);
111 ed9e98a8 2017-11-29 stsp memset(&ds, 0, sizeof(ds));
112 f9d67749 2017-11-30 stsp /* XXX should stat buffers be passed in args instead of ds? */
113 f9d67749 2017-11-30 stsp ds.stb1.st_mode = S_IFREG;
115 f934cf2c 2018-02-12 stsp ds.stb1.st_size = size1;
116 f9d67749 2017-11-30 stsp ds.stb1.st_mtime = 0; /* XXX */
118 f9d67749 2017-11-30 stsp ds.stb2.st_mode = S_IFREG;
120 f934cf2c 2018-02-12 stsp ds.stb2.st_size = size2;
121 f9d67749 2017-11-30 stsp ds.stb2.st_mtime = 0; /* XXX */
123 f9d67749 2017-11-30 stsp memset(&args, 0, sizeof(args));
124 8ba9a219 2017-11-29 stsp args.diff_format = D_UNIFIED;
125 98abbc84 2017-11-30 stsp args.label[0] = label1 ? label1 : idstr1;
126 98abbc84 2017-11-30 stsp args.label[1] = label2 ? label2 : idstr2;
128 cb74ff21 2017-11-30 stsp err = got_diffreg(&res, f1, f2, flags, &args, &ds, outfile);
131 98abbc84 2017-11-30 stsp fclose(f1);
133 98abbc84 2017-11-30 stsp fclose(f2);
134 7d283eee 2017-11-29 stsp return err;
137 a3e2cbea 2017-12-01 stsp struct got_tree_entry *
138 a3e2cbea 2017-12-01 stsp match_entry_by_name(struct got_tree_entry *te1, struct got_tree_object *tree2)
140 a3e2cbea 2017-12-01 stsp struct got_tree_entry *te2;
142 a3e2cbea 2017-12-01 stsp SIMPLEQ_FOREACH(te2, &tree2->entries, entry) {
143 a3e2cbea 2017-12-01 stsp if (strcmp(te1->name, te2->name) == 0)
144 a3e2cbea 2017-12-01 stsp return te2;
146 474b4f94 2017-11-30 stsp return NULL;
149 474b4f94 2017-11-30 stsp static const struct got_error *
150 74671950 2018-02-11 stsp diff_added_blob(struct got_object_id *id, struct got_repository *repo,
151 74671950 2018-02-11 stsp FILE *outfile)
153 4e22badc 2017-11-30 stsp const struct got_error *err;
154 4e22badc 2017-11-30 stsp struct got_blob_object *blob;
155 4e22badc 2017-11-30 stsp struct got_object *obj;
157 4e22badc 2017-11-30 stsp err = got_object_open(&obj, repo, id);
159 4e22badc 2017-11-30 stsp return err;
160 c7020aea 2017-11-30 stsp err = got_object_blob_open(&blob, repo, obj, 8192);
161 4e22badc 2017-11-30 stsp if (err != NULL)
162 4e22badc 2017-11-30 stsp return err;
164 74671950 2018-02-11 stsp return got_diff_blob(NULL, blob, NULL, NULL, outfile);
167 474b4f94 2017-11-30 stsp static const struct got_error *
168 6a213ccb 2017-11-30 stsp diff_modified_blob(struct got_object_id *id1, struct got_object_id *id2,
169 74671950 2018-02-11 stsp struct got_repository *repo, FILE *outfile)
171 6a213ccb 2017-11-30 stsp const struct got_error *err;
172 6a213ccb 2017-11-30 stsp struct got_object *obj1 = NULL;
173 6a213ccb 2017-11-30 stsp struct got_object *obj2 = NULL;
174 6a213ccb 2017-11-30 stsp struct got_blob_object *blob1 = NULL;
175 6a213ccb 2017-11-30 stsp struct got_blob_object *blob2 = NULL;
177 6a213ccb 2017-11-30 stsp err = got_object_open(&obj1, repo, id1);
179 6a213ccb 2017-11-30 stsp return got_error(GOT_ERR_BAD_OBJ_HDR);
180 eef6493a 2018-01-19 stsp if (got_object_get_type(obj1) != GOT_OBJ_TYPE_BLOB) {
181 6a213ccb 2017-11-30 stsp err = got_error(GOT_ERR_OBJ_TYPE);
185 6a213ccb 2017-11-30 stsp err = got_object_open(&obj2, repo, id2);
187 6a213ccb 2017-11-30 stsp err= got_error(GOT_ERR_BAD_OBJ_HDR);
190 eef6493a 2018-01-19 stsp if (got_object_get_type(obj2) != GOT_OBJ_TYPE_BLOB) {
191 6a213ccb 2017-11-30 stsp err = got_error(GOT_ERR_BAD_OBJ_DATA);
195 c7020aea 2017-11-30 stsp err = got_object_blob_open(&blob1, repo, obj1, 8192);
196 6a213ccb 2017-11-30 stsp if (err != NULL) {
197 6a213ccb 2017-11-30 stsp err = got_error(GOT_ERR_FILE_OPEN);
201 c7020aea 2017-11-30 stsp err = got_object_blob_open(&blob2, repo, obj2, 8192);
202 6a213ccb 2017-11-30 stsp if (err != NULL) {
203 6a213ccb 2017-11-30 stsp err = got_error(GOT_ERR_FILE_OPEN);
207 74671950 2018-02-11 stsp err = got_diff_blob(blob1, blob2, NULL, NULL, outfile);
211 a3e2cbea 2017-12-01 stsp got_object_close(obj1);
213 a3e2cbea 2017-12-01 stsp got_object_close(obj2);
215 a3e2cbea 2017-12-01 stsp got_object_blob_close(blob1);
217 a3e2cbea 2017-12-01 stsp got_object_blob_close(blob2);
218 6a213ccb 2017-11-30 stsp return err;
221 474b4f94 2017-11-30 stsp static const struct got_error *
222 74671950 2018-02-11 stsp diff_deleted_blob(struct got_object_id *id, struct got_repository *repo,
223 74671950 2018-02-11 stsp FILE *outfile)
225 365fb436 2017-11-30 stsp const struct got_error *err;
226 365fb436 2017-11-30 stsp struct got_blob_object *blob;
227 365fb436 2017-11-30 stsp struct got_object *obj;
229 365fb436 2017-11-30 stsp err = got_object_open(&obj, repo, id);
231 365fb436 2017-11-30 stsp return err;
232 c7020aea 2017-11-30 stsp err = got_object_blob_open(&blob, repo, obj, 8192);
233 365fb436 2017-11-30 stsp if (err != NULL)
234 365fb436 2017-11-30 stsp return err;
236 74671950 2018-02-11 stsp return got_diff_blob(blob, NULL, NULL, NULL, outfile);
239 474b4f94 2017-11-30 stsp static const struct got_error *
240 74671950 2018-02-11 stsp diff_added_tree(struct got_object_id *id, struct got_repository *repo,
241 74671950 2018-02-11 stsp FILE *outfile)
243 9c70d4c3 2017-11-30 stsp const struct got_error *err = NULL;
244 9c70d4c3 2017-11-30 stsp struct got_object *treeobj = NULL;
245 9c70d4c3 2017-11-30 stsp struct got_tree_object *tree = NULL;
247 9c70d4c3 2017-11-30 stsp err = got_object_open(&treeobj, repo, id);
251 b107e67f 2018-01-19 stsp if (got_object_get_type(treeobj) != GOT_OBJ_TYPE_TREE) {
252 9c70d4c3 2017-11-30 stsp err = got_error(GOT_ERR_OBJ_TYPE);
256 9c70d4c3 2017-11-30 stsp err = got_object_tree_open(&tree, repo, treeobj);
260 74671950 2018-02-11 stsp err = got_diff_tree(NULL, tree, repo, outfile);
264 9c70d4c3 2017-11-30 stsp got_object_tree_close(tree);
265 9c70d4c3 2017-11-30 stsp if (treeobj)
266 9c70d4c3 2017-11-30 stsp got_object_close(treeobj);
267 9c70d4c3 2017-11-30 stsp return err;
270 474b4f94 2017-11-30 stsp static const struct got_error *
271 789689b5 2017-11-30 stsp diff_modified_tree(struct got_object_id *id1, struct got_object_id *id2,
272 74671950 2018-02-11 stsp struct got_repository *repo, FILE *outfile)
274 789689b5 2017-11-30 stsp const struct got_error *err = NULL;
275 789689b5 2017-11-30 stsp struct got_object *treeobj1 = NULL;
276 789689b5 2017-11-30 stsp struct got_object *treeobj2 = NULL;
277 789689b5 2017-11-30 stsp struct got_tree_object *tree1 = NULL;
278 789689b5 2017-11-30 stsp struct got_tree_object *tree2 = NULL;
280 789689b5 2017-11-30 stsp err = got_object_open(&treeobj1, repo, id1);
284 eef6493a 2018-01-19 stsp if (got_object_get_type(treeobj1) != GOT_OBJ_TYPE_TREE) {
285 789689b5 2017-11-30 stsp err = got_error(GOT_ERR_OBJ_TYPE);
289 789689b5 2017-11-30 stsp err = got_object_open(&treeobj2, repo, id2);
293 eef6493a 2018-01-19 stsp if (got_object_get_type(treeobj2) != GOT_OBJ_TYPE_TREE) {
294 789689b5 2017-11-30 stsp err = got_error(GOT_ERR_OBJ_TYPE);
298 789689b5 2017-11-30 stsp err = got_object_tree_open(&tree1, repo, treeobj1);
302 789689b5 2017-11-30 stsp err = got_object_tree_open(&tree2, repo, treeobj2);
306 74671950 2018-02-11 stsp err = got_diff_tree(tree1, tree2, repo, outfile);
310 789689b5 2017-11-30 stsp got_object_tree_close(tree1);
312 789689b5 2017-11-30 stsp got_object_tree_close(tree2);
313 789689b5 2017-11-30 stsp if (treeobj1)
314 789689b5 2017-11-30 stsp got_object_close(treeobj1);
315 789689b5 2017-11-30 stsp if (treeobj2)
316 789689b5 2017-11-30 stsp got_object_close(treeobj2);
317 789689b5 2017-11-30 stsp return err;
320 474b4f94 2017-11-30 stsp static const struct got_error *
321 74671950 2018-02-11 stsp diff_deleted_tree(struct got_object_id *id, struct got_repository *repo, FILE *outfile)
323 2c56f2ce 2017-11-30 stsp const struct got_error *err = NULL;
324 2c56f2ce 2017-11-30 stsp struct got_object *treeobj = NULL;
325 2c56f2ce 2017-11-30 stsp struct got_tree_object *tree = NULL;
327 2c56f2ce 2017-11-30 stsp err = got_object_open(&treeobj, repo, id);
331 b107e67f 2018-01-19 stsp if (got_object_get_type(treeobj) != GOT_OBJ_TYPE_TREE) {
332 2c56f2ce 2017-11-30 stsp err = got_error(GOT_ERR_OBJ_TYPE);
336 2c56f2ce 2017-11-30 stsp err = got_object_tree_open(&tree, repo, treeobj);
340 74671950 2018-02-11 stsp err = got_diff_tree(tree, NULL, repo, outfile);
344 2c56f2ce 2017-11-30 stsp got_object_tree_close(tree);
345 2c56f2ce 2017-11-30 stsp if (treeobj)
346 2c56f2ce 2017-11-30 stsp got_object_close(treeobj);
347 2c56f2ce 2017-11-30 stsp return err;
350 474b4f94 2017-11-30 stsp static const struct got_error *
351 74671950 2018-02-11 stsp diff_kind_mismatch(struct got_object_id *id1, struct got_object_id *id2,
352 74671950 2018-02-11 stsp FILE *outfile)
354 013404a9 2017-11-30 stsp /* XXX TODO */
355 474b4f94 2017-11-30 stsp return NULL;
358 474b4f94 2017-11-30 stsp static const struct got_error *
359 6a213ccb 2017-11-30 stsp diff_entry_old_new(struct got_tree_entry *te1, struct got_tree_object *tree2,
360 74671950 2018-02-11 stsp struct got_repository *repo, FILE *outfile)
362 474b4f94 2017-11-30 stsp const struct got_error *err;
363 474b4f94 2017-11-30 stsp struct got_tree_entry *te2;
364 a3e2cbea 2017-12-01 stsp char hex[SHA1_DIGEST_STRING_LENGTH];
366 a3e2cbea 2017-12-01 stsp te2 = match_entry_by_name(te1, tree2);
367 474b4f94 2017-11-30 stsp if (te2 == NULL) {
368 474b4f94 2017-11-30 stsp if (S_ISDIR(te1->mode))
369 59ece79d 2018-02-12 stsp return diff_deleted_tree(te1->id, repo, outfile);
370 59ece79d 2018-02-12 stsp return diff_deleted_blob(te1->id, repo, outfile);
373 4209f790 2017-11-30 stsp if (S_ISDIR(te1->mode) && S_ISDIR(te2->mode)) {
374 59ece79d 2018-02-12 stsp if (got_object_id_cmp(te1->id, te2->id) != 0)
375 59ece79d 2018-02-12 stsp return diff_modified_tree(te1->id, te2->id, repo,
377 4209f790 2017-11-30 stsp } else if (S_ISREG(te1->mode) && S_ISREG(te2->mode)) {
378 59ece79d 2018-02-12 stsp if (got_object_id_cmp(te1->id, te2->id) != 0)
379 59ece79d 2018-02-12 stsp return diff_modified_blob(te1->id, te2->id, repo,
383 59ece79d 2018-02-12 stsp return diff_kind_mismatch(te1->id, te2->id, outfile);
386 474b4f94 2017-11-30 stsp static const struct got_error *
387 4e22badc 2017-11-30 stsp diff_entry_new_old(struct got_tree_entry *te2, struct got_tree_object *tree1,
388 74671950 2018-02-11 stsp struct got_repository *repo, FILE *outfile)
390 474b4f94 2017-11-30 stsp const struct got_error *err;
391 474b4f94 2017-11-30 stsp struct got_tree_entry *te1;
393 a3e2cbea 2017-12-01 stsp te1 = match_entry_by_name(te2, tree1);
394 474b4f94 2017-11-30 stsp if (te1 != NULL) /* handled by diff_entry_old_new() */
395 474b4f94 2017-11-30 stsp return NULL;
397 474b4f94 2017-11-30 stsp if (S_ISDIR(te2->mode))
398 59ece79d 2018-02-12 stsp return diff_added_tree(te2->id, repo, outfile);
399 59ece79d 2018-02-12 stsp return diff_added_blob(te2->id, repo, outfile);
402 474b4f94 2017-11-30 stsp const struct got_error *
403 474b4f94 2017-11-30 stsp got_diff_tree(struct got_tree_object *tree1, struct got_tree_object *tree2,
404 74671950 2018-02-11 stsp struct got_repository *repo, FILE *outfile)
406 474b4f94 2017-11-30 stsp const struct got_error *err = NULL;
407 789689b5 2017-11-30 stsp struct got_tree_entry *te1 = NULL;
408 789689b5 2017-11-30 stsp struct got_tree_entry *te2 = NULL;
411 789689b5 2017-11-30 stsp te1 = SIMPLEQ_FIRST(&tree1->entries);
413 789689b5 2017-11-30 stsp te2 = SIMPLEQ_FIRST(&tree2->entries);
417 74671950 2018-02-11 stsp err = diff_entry_old_new(te1, tree2, repo, outfile);
423 74671950 2018-02-11 stsp err = diff_entry_new_old(te2, tree1, repo, outfile);
429 474b4f94 2017-11-30 stsp te1 = SIMPLEQ_NEXT(te1, entry);
431 474b4f94 2017-11-30 stsp te2 = SIMPLEQ_NEXT(te2, entry);
432 474b4f94 2017-11-30 stsp } while (te1 || te2);
434 474b4f94 2017-11-30 stsp return err;