Bug Summary

File:got/../lib/blame.c
Warning:line 137, column 3
Value stored to 'left_start' is never read

Annotated Source Code

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clang -cc1 -cc1 -triple amd64-unknown-openbsd6.9 -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name blame.c -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -mrelocation-model pic -pic-level 1 -pic-is-pie -mframe-pointer=all -relaxed-aliasing -fno-rounding-math -mconstructor-aliases -munwind-tables -target-cpu x86-64 -target-feature +retpoline-indirect-calls -target-feature +retpoline-indirect-branches -fno-split-dwarf-inlining -debugger-tuning=gdb -resource-dir /usr/local/lib/clang/11.1.0 -I /home/ben/Projects/got/got/../include -I /home/ben/Projects/got/got/../lib -D GOT_LIBEXECDIR=/home/ben/bin -D GOT_VERSION=0.53-current -internal-isystem /usr/local/lib/clang/11.1.0/include -internal-externc-isystem /usr/include -O0 -fdebug-compilation-dir /home/ben/Projects/got/got/obj -ferror-limit 19 -fwrapv -D_RET_PROTECTOR -ret-protector -fgnuc-version=4.2.1 -fno-builtin-malloc -fno-builtin-calloc -fno-builtin-realloc -fno-builtin-valloc -fno-builtin-free -fno-builtin-strdup -fno-builtin-strndup -analyzer-output=html -faddrsig -o /home/ben/Projects/got/scan/2021-05-28-230913-68537-1 -x c /home/ben/Projects/got/got/../lib/blame.c
1/*
2 * Copyright (c) 2018, 2019, 2020 Stefan Sperling <stsp@openbsd.org>
3 * Copyright (c) 2020 Neels Hofmeyr <neels@hofmeyr.de>
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/mman.h>
20#include <sys/stat.h>
21
22#include <errno(*__errno()).h>
23#include <sha1.h>
24#include <string.h>
25#include <stdio.h>
26#include <stdlib.h>
27#include <time.h>
28#include <limits.h>
29#include <util.h>
30#include <zlib.h>
31
32#include "got_error.h"
33#include "got_object.h"
34#include "got_cancel.h"
35#include "got_blame.h"
36#include "got_commit_graph.h"
37#include "got_opentemp.h"
38
39#include "got_lib_inflate.h"
40#include "got_lib_delta.h"
41#include "got_lib_object.h"
42#include "got_lib_diff.h"
43
44#ifndef MAX
45#define MAX(_a,_b)((_a) > (_b) ? (_a) : (_b)) ((_a) > (_b) ? (_a) : (_b))
46#endif
47
48struct got_blame_line {
49 int annotated;
50 struct got_object_id id;
51};
52
53struct got_blame {
54 struct diff_config *cfg;
55 int nlines; /* number of lines in file being blamed */
56 int nannotated; /* number of lines already annotated */
57 struct got_blame_line *lines; /* one per line */
58 int ncommits;
59
60 /*
61 * These change with every traversed commit. After diffing
62 * commits N:N-1, in preparation for diffing commits N-1:N-2,
63 * data for commit N is retained and flipped into data for N-1.
64 *
65 */
66 FILE *f1; /* older version from commit N-1. */
67 FILE *f2; /* newer version from commit N. */
68 unsigned char *map1;
69 unsigned char *map2;
70 off_t size1;
71 off_t size2;
72 int nlines1;
73 int nlines2;
74 off_t *line_offsets1;
75 off_t *line_offsets2;
76
77 /*
78 * Map line numbers of an older version of the file to valid line
79 * numbers in the version of the file being blamed. This map is
80 * updated with each commit we traverse throughout the file's history.
81 * Lines mapped to -1 do not correspond to any line in the version
82 * being blamed.
83 */
84 int *linemap1;
85 int *linemap2;
86
87 struct diff_data *data1;
88 struct diff_data *data2;
89};
90
91static const struct got_error *
92annotate_line(struct got_blame *blame, int lineno, struct got_object_id *id,
93 const struct got_error *(*cb)(void *, int, int, struct got_object_id *),
94 void *arg)
95{
96 const struct got_error *err = NULL((void *)0);
97 struct got_blame_line *line;
98
99 if (lineno < 0 || lineno >= blame->nlines)
100 return NULL((void *)0);
101
102 line = &blame->lines[lineno];
103 if (line->annotated)
104 return NULL((void *)0);
105
106 memcpy(&line->id, id, sizeof(line->id));
107 line->annotated = 1;
108 blame->nannotated++;
109 if (cb)
110 err = cb(arg, blame->nlines, lineno + 1, id);
111 return err;
112}
113
114static const struct got_error *
115blame_changes(struct got_blame *blame, struct diff_result *diff_result,
116 struct got_object_id *commit_id,
117 const struct got_error *(*cb)(void *, int, int, struct got_object_id *),
118 void *arg)
119{
120 const struct got_error *err = NULL((void *)0);
121 int i;
122 int idx1 = 0, idx2 = 0;
123
124 for (i = 0; i < diff_result->chunks.len &&
125 blame->nannotated < blame->nlines; i++) {
126 struct diff_chunk *c = diff_chunk_get(diff_result, i);
127 unsigned int left_start, left_count;
128 unsigned int right_start, right_count;
129 int j;
130
131 /*
132 * We do not need to worry about idx1/idx2 growing out
133 * of bounds because the diff implementation ensures
134 * that chunk ranges never exceed the number of lines
135 * in the left/right input files.
136 */
137 left_start = diff_chunk_get_left_start(c, diff_result, 0);
Value stored to 'left_start' is never read
138 left_count = diff_chunk_get_left_count(c);
139 right_start = diff_chunk_get_right_start(c, diff_result, 0);
140 right_count = diff_chunk_get_right_count(c);
141
142 if (left_count == right_count) {
143 for (j = 0; j < left_count; j++) {
144 blame->linemap1[idx1++] =
145 blame->linemap2[idx2++];
146 }
147 continue;
148 }
149
150 if (right_count == 0) {
151 for (j = 0; j < left_count; j++) {
152 blame->linemap1[idx1++] = -1;
153 }
154 continue;
155 }
156
157 for (j = 0; j < right_count; j++) {
158 int ln = blame->linemap2[idx2++];
159 err = annotate_line(blame, ln, commit_id, cb, arg);
160 if (err)
161 return err;
162 if (blame->nlines == blame->nannotated)
163 break;
164 }
165 }
166
167 return NULL((void *)0);
168}
169
170static const struct got_error *
171blame_prepare_file(FILE *f, unsigned char **p, off_t *size,
172 int *nlines, off_t **line_offsets, struct diff_data *diff_data,
173 const struct diff_config *cfg, struct got_blob_object *blob)
174{
175 const struct got_error *err = NULL((void *)0);
176 int diff_flags = 0, rc;
177
178 err = got_object_blob_dump_to_file(size, nlines, line_offsets,
179 f, blob);
180 if (err)
181 return err;
182
183#ifndef GOT_DIFF_NO_MMAP
184 *p = mmap(NULL((void *)0), *size, PROT_READ0x01, MAP_PRIVATE0x0002, fileno(f)(!__isthreaded ? ((f)->_file) : (fileno)(f)), 0);
185 if (*p == MAP_FAILED((void *)-1))
186#endif
187 *p = NULL((void *)0); /* fall back on file I/O */
188
189 /* Allow blaming lines in binary files even though it's useless. */
190 diff_flags |= DIFF_FLAG_FORCE_TEXT_DATA0x00000004;
191
192 rc = diff_atomize_file(diff_data, cfg, f, *p, *size, diff_flags);
193 if (rc)
194 return got_error_set_errno(rc, "diff_atomize_file");
195
196 return NULL((void *)0);
197}
198
199static const struct got_error *
200blame_commit(struct got_blame *blame, struct got_object_id *id,
201 const char *path, struct got_repository *repo,
202 const struct got_error *(*cb)(void *, int, int, struct got_object_id *),
203 void *arg)
204{
205 const struct got_error *err = NULL((void *)0);
206 struct got_commit_object *commit = NULL((void *)0);
207 struct got_object_qid *pid = NULL((void *)0);
208 struct got_object_id *pblob_id = NULL((void *)0);
209 struct got_blob_object *pblob = NULL((void *)0);
210 struct diff_result *diff_result = NULL((void *)0);
211
212 err = got_object_open_as_commit(&commit, repo, id);
213 if (err)
214 return err;
215
216 pid = SIMPLEQ_FIRST(got_object_commit_get_parent_ids(commit))((got_object_commit_get_parent_ids(commit))->sqh_first);
217 if (pid == NULL((void *)0)) {
218 got_object_commit_close(commit);
219 return NULL((void *)0);
220 }
221
222 err = got_object_id_by_path(&pblob_id, repo, pid->id, path);
223 if (err) {
224 if (err->code == GOT_ERR_NO_TREE_ENTRY50)
225 err = NULL((void *)0);
226 goto done;
227 }
228
229 err = got_object_open_as_blob(&pblob, repo, pblob_id, 8192);
230 if (err)
231 goto done;
232
233 blame->f1 = got_opentemp();
234 if (blame->f1 == NULL((void *)0)) {
235 err = got_error_from_errno("got_opentemp");
236 goto done;
237 }
238
239 err = blame_prepare_file(blame->f1, &blame->map1, &blame->size1,
240 &blame->nlines1, &blame->line_offsets1, blame->data1,
241 blame->cfg, pblob);
242 if (err)
243 goto done;
244
245 diff_result = diff_main(blame->cfg, blame->data1, blame->data2);
246 if (diff_result == NULL((void *)0)) {
247 err = got_error_set_errno(ENOMEM12, "malloc");
248 goto done;
249 }
250 if (diff_result->rc != DIFF_RC_OK0) {
251 err = got_error_set_errno(diff_result->rc, "diff");
252 goto done;
253 }
254 if (diff_result->chunks.len > 0) {
255 if (blame->nlines1 > 0) {
256 blame->linemap1 = calloc(blame->nlines1,
257 sizeof(*blame->linemap1));
258 if (blame->linemap1 == NULL((void *)0)) {
259 err = got_error_from_errno("malloc");
260 goto done;
261 }
262 }
263 err = blame_changes(blame, diff_result, id, cb, arg);
264 if (err)
265 goto done;
266 } else if (cb)
267 err = cb(arg, blame->nlines, -1, id);
268done:
269 if (diff_result)
270 diff_result_free(diff_result);
271 if (commit)
272 got_object_commit_close(commit);
273 free(pblob_id);
274 if (pblob)
275 got_object_blob_close(pblob);
276 return err;
277}
278
279static const struct got_error *
280blame_close(struct got_blame *blame)
281{
282 const struct got_error *err = NULL((void *)0);
283
284 diff_data_free(blame->data1);
285 free(blame->data1);
286 diff_data_free(blame->data2);
287 free(blame->data2);
288 if (blame->map1) {
289 if (munmap(blame->map1, blame->size1) == -1 && err == NULL((void *)0))
290 err = got_error_from_errno("munmap");
291 }
292 if (blame->map2) {
293 if (munmap(blame->map2, blame->size2) == -1 && err == NULL((void *)0))
294 err = got_error_from_errno("munmap");
295 }
296 if (blame->f1 && fclose(blame->f1) == EOF(-1) && err == NULL((void *)0))
297 err = got_error_from_errno("fclose");
298 if (blame->f2 && fclose(blame->f2) == EOF(-1) && err == NULL((void *)0))
299 err = got_error_from_errno("fclose");
300 free(blame->lines);
301 free(blame->line_offsets1);
302 free(blame->line_offsets2);
303 free(blame->linemap1);
304 free(blame->linemap2);
305 free(blame->cfg);
306 free(blame);
307 return err;
308}
309
310static int
311atomize_file(struct diff_data *d, FILE *f, off_t filesize, int nlines,
312 off_t *line_offsets)
313{
314 int i, rc = DIFF_RC_OK0;
315 int embedded_nul = 0;
316
317 ARRAYLIST_INIT(d->atoms, nlines)do { (d->atoms).head = ((void *)0); (d->atoms).len = 0;
(d->atoms).allocated = 0; (d->atoms).alloc_blocksize =
nlines; } while(0)
;
318
319 for (i = 0; i < nlines; i++) {
320 struct diff_atom *atom;
321 off_t len, pos = line_offsets[i];
322 unsigned int hash = 0;
323 int j;
324
325 ARRAYLIST_ADD(atom, d->atoms)do { if ((d->atoms).len && !(d->atoms).allocated
) { atom = ((void *)0); break; } if ((d->atoms).head == ((
void *)0) || (d->atoms).allocated < (d->atoms).len +
1) { (d->atoms).p = recallocarray((d->atoms).head, (d->
atoms).len, (d->atoms).allocated + ((d->atoms).alloc_blocksize
? : 8), sizeof(*(d->atoms).head)); if ((d->atoms).p ==
((void *)0)) { atom = ((void *)0); break; } (d->atoms).allocated
+= (d->atoms).alloc_blocksize ? : 8; (d->atoms).head =
(d->atoms).p; (d->atoms).p = ((void *)0); }; if ((d->
atoms).head == ((void *)0) || (d->atoms).allocated < (d
->atoms).len + 1) { atom = ((void *)0); break; } (atom) = &
(d->atoms).head[(d->atoms).len]; (d->atoms).len++; }
while (0)
;
326 if (atom == NULL((void *)0)) {
327 rc = errno(*__errno());
328 break;
329 }
330
331 if (i < nlines - 1)
332 len = line_offsets[i + 1] - pos;
333 else
334 len = filesize - pos;
335
336 if (fseeko(f, pos, SEEK_SET0) == -1) {
337 rc = errno(*__errno());
338 break;
339 }
340 for (j = 0; j < len; j++) {
341 int c = fgetc(f);
342 if (c == EOF(-1)) {
343 if (feof(f)(!__isthreaded ? (((f)->_flags & 0x0020) != 0) : (feof
)(f))
)
344 rc = EIO5; /* unexpected EOF */
345 else
346 rc = errno(*__errno());
347 goto done;
348 }
349
350 hash = diff_atom_hash_update(hash, (unsigned char)c);
351
352 if (c == '\0')
353 embedded_nul = 1;
354
355 }
356 *atom = (struct diff_atom){
357 .root = d,
358 .pos = pos,
359 .at = NULL((void *)0), /* atom data is not memory-mapped */
360 .len = len,
361 .hash = hash,
362 };
363 }
364
365 /* File are considered binary if they contain embedded '\0' bytes. */
366 if (embedded_nul)
367 d->atomizer_flags |= DIFF_ATOMIZER_FOUND_BINARY_DATA0x00000001;
368done:
369 if (rc)
370 ARRAYLIST_FREE(d->atoms)do { if ((d->atoms).head && (d->atoms).allocated
) free((d->atoms).head); do { (d->atoms).head = ((void *
)0); (d->atoms).len = 0; (d->atoms).allocated = 0; (d->
atoms).alloc_blocksize = (d->atoms).alloc_blocksize; } while
(0); } while(0)
;
371
372 return rc;
373}
374
375static int
376atomize_file_mmap(struct diff_data *d, unsigned char *p,
377 off_t filesize, int nlines, off_t *line_offsets)
378{
379 int i, rc = DIFF_RC_OK0;
380 int embedded_nul = 0;
381
382 ARRAYLIST_INIT(d->atoms, nlines)do { (d->atoms).head = ((void *)0); (d->atoms).len = 0;
(d->atoms).allocated = 0; (d->atoms).alloc_blocksize =
nlines; } while(0)
;
383
384 for (i = 0; i < nlines; i++) {
385 struct diff_atom *atom;
386 off_t len, pos = line_offsets[i];
387 unsigned int hash = 0;
388 int j;
389
390 ARRAYLIST_ADD(atom, d->atoms)do { if ((d->atoms).len && !(d->atoms).allocated
) { atom = ((void *)0); break; } if ((d->atoms).head == ((
void *)0) || (d->atoms).allocated < (d->atoms).len +
1) { (d->atoms).p = recallocarray((d->atoms).head, (d->
atoms).len, (d->atoms).allocated + ((d->atoms).alloc_blocksize
? : 8), sizeof(*(d->atoms).head)); if ((d->atoms).p ==
((void *)0)) { atom = ((void *)0); break; } (d->atoms).allocated
+= (d->atoms).alloc_blocksize ? : 8; (d->atoms).head =
(d->atoms).p; (d->atoms).p = ((void *)0); }; if ((d->
atoms).head == ((void *)0) || (d->atoms).allocated < (d
->atoms).len + 1) { atom = ((void *)0); break; } (atom) = &
(d->atoms).head[(d->atoms).len]; (d->atoms).len++; }
while (0)
;
391 if (atom == NULL((void *)0)) {
392 rc = errno(*__errno());
393 break;
394 }
395
396 if (i < nlines - 1)
397 len = line_offsets[i + 1] - pos;
398 else
399 len = filesize - pos;
400
401 for (j = 0; j < len; j++)
402 hash = diff_atom_hash_update(hash, p[pos + j]);
403
404 if (!embedded_nul && memchr(&p[pos], '\0', len) != NULL((void *)0))
405 embedded_nul = 1;
406
407 *atom = (struct diff_atom){
408 .root = d,
409 .pos = pos,
410 .at = &p[pos],
411 .len = len,
412 .hash = hash,
413 };
414 }
415
416 /* File are considered binary if they contain embedded '\0' bytes. */
417 if (embedded_nul)
418 d->atomizer_flags |= DIFF_ATOMIZER_FOUND_BINARY_DATA0x00000001;
419
420 if (rc)
421 ARRAYLIST_FREE(d->atoms)do { if ((d->atoms).head && (d->atoms).allocated
) free((d->atoms).head); do { (d->atoms).head = ((void *
)0); (d->atoms).len = 0; (d->atoms).allocated = 0; (d->
atoms).alloc_blocksize = (d->atoms).alloc_blocksize; } while
(0); } while(0)
;
422
423 return rc;
424}
425
426/* Implements diff_atomize_func_t */
427static int
428blame_atomize_file(void *arg, struct diff_data *d)
429{
430 struct got_blame *blame = arg;
431
432 if (d->f == blame->f1) {
433 if (blame->map1)
434 return atomize_file_mmap(d, blame->map1,
435 blame->size1, blame->nlines1,
436 blame->line_offsets1);
437 else
438 return atomize_file(d, blame->f1, blame->size1,
439 blame->nlines1, blame->line_offsets1);
440 } else if (d->f == blame->f2) {
441 if (d->atoms.len > 0) {
442 /* Re-use data from previous commit. */
443 return DIFF_RC_OK0;
444 }
445 if (blame->map2)
446 return atomize_file_mmap(d, blame->map2,
447 blame->size2, blame->nlines2,
448 blame->line_offsets2);
449 else
450 return atomize_file(d, blame->f2, blame->size2,
451 blame->nlines2, blame->line_offsets2);
452 }
453
454 return DIFF_RC_OK0;
455}
456
457static const struct got_error *
458close_file2_and_reuse_file1(struct got_blame *blame)
459{
460 struct diff_data *d;
461
462 free(blame->line_offsets2);
463 blame->line_offsets2 = blame->line_offsets1;
464 blame->line_offsets1 = NULL((void *)0);
465
466 free(blame->linemap2);
467 blame->linemap2 = blame->linemap1;
468 blame->linemap1 = NULL((void *)0);
469
470 if (blame->map2) {
471 if (munmap(blame->map2, blame->size2) == -1)
472 return got_error_from_errno("munmap");
473 blame->map2 = blame->map1;
474 blame->map1 = NULL((void *)0);
475
476 }
477 blame->size2 = blame->size1;
478 blame->size1 = 0;
479
480 if (fclose(blame->f2) == EOF(-1))
481 return got_error_from_errno("fclose");
482 blame->f2 = blame->f1;
483 blame->f1 = NULL((void *)0);
484
485 blame->nlines2 = blame->nlines1;
486 blame->nlines1 = 0;
487
488 diff_data_free(blame->data2); /* does not free pointer itself */
489 memset(blame->data2, 0, sizeof(*blame->data2));
490 d = blame->data2;
491 blame->data2 = blame->data1;
492 blame->data1 = d;
493
494 return NULL((void *)0);
495}
496
497static const struct got_error *
498blame_open(struct got_blame **blamep, const char *path,
499 struct got_object_id *start_commit_id, struct got_repository *repo,
500 const struct got_error *(*cb)(void *, int, int, struct got_object_id *),
501 void *arg, got_cancel_cb cancel_cb, void *cancel_arg)
502{
503 const struct got_error *err = NULL((void *)0);
504 struct got_object_id *obj_id = NULL((void *)0);
505 struct got_blob_object *blob = NULL((void *)0);
506 struct got_blame *blame = NULL((void *)0);
507 struct got_object_id *id = NULL((void *)0);
508 int lineno;
509 struct got_commit_graph *graph = NULL((void *)0);
510
511 *blamep = NULL((void *)0);
512
513 err = got_object_id_by_path(&obj_id, repo, start_commit_id, path);
514 if (err)
515 goto done;
516
517 err = got_object_open_as_blob(&blob, repo, obj_id, 8192);
518 if (err)
519 goto done;
520
521 blame = calloc(1, sizeof(*blame));
522 if (blame == NULL((void *)0)) {
523 err = got_error_from_errno("calloc");
524 goto done;
525 }
526
527 blame->data1 = calloc(1, sizeof(*blame->data1));
528 if (blame->data1 == NULL((void *)0)) {
529 err = got_error_from_errno("calloc");
530 goto done;
531 }
532 blame->data2 = calloc(1, sizeof(*blame->data2));
533 if (blame->data2 == NULL((void *)0)) {
534 err = got_error_from_errno("calloc");
535 goto done;
536 }
537
538 blame->f2 = got_opentemp();
539 if (blame->f2 == NULL((void *)0)) {
540 err = got_error_from_errno("got_opentemp");
541 goto done;
542 }
543 err = got_diff_get_config(&blame->cfg, GOT_DIFF_ALGORITHM_PATIENCE,
544 blame_atomize_file, blame);
545 if (err)
546 goto done;
547
548 err = blame_prepare_file(blame->f2, &blame->map2, &blame->size2,
549 &blame->nlines2, &blame->line_offsets2, blame->data2,
550 blame->cfg, blob);
551 blame->nlines = blame->nlines2;
552 if (err || blame->nlines == 0)
553 goto done;
554
555 got_object_blob_close(blob);
556 blob = NULL((void *)0);
557
558 /* Don't include \n at EOF in the blame line count. */
559 if (blame->line_offsets2[blame->nlines - 1] == blame->size2)
560 blame->nlines--;
561
562 blame->lines = calloc(blame->nlines, sizeof(*blame->lines));
563 if (blame->lines == NULL((void *)0)) {
564 err = got_error_from_errno("calloc");
565 goto done;
566 }
567
568 blame->linemap2 = calloc(blame->nlines2, sizeof(*blame->linemap2));
569 if (blame->linemap2 == NULL((void *)0)) {
570 err = got_error_from_errno("calloc");
571 goto done;
572 }
573 for (lineno = 0; lineno < blame->nlines2; lineno++)
574 blame->linemap2[lineno] = lineno;
575
576 err = got_commit_graph_open(&graph, path, 1);
577 if (err)
578 goto done;
579
580 err = got_commit_graph_iter_start(graph, start_commit_id, repo,
581 cancel_cb, cancel_arg);
582 if (err)
583 goto done;
584 for (;;) {
585 struct got_object_id *next_id;
586 err = got_commit_graph_iter_next(&next_id, graph, repo,
587 cancel_cb, cancel_arg);
588 if (err) {
589 if (err->code == GOT_ERR_ITER_COMPLETED46) {
590 err = NULL((void *)0);
591 break;
592 }
593 goto done;
594 }
595 if (next_id) {
596 id = next_id;
597 err = blame_commit(blame, id, path, repo, cb, arg);
598 if (err) {
599 if (err->code == GOT_ERR_ITER_COMPLETED46)
600 err = NULL((void *)0);
601 goto done;
602 }
603 if (blame->nannotated == blame->nlines)
604 break;
605
606 err = close_file2_and_reuse_file1(blame);
607 if (err)
608 goto done;
609 }
610 }
611
612 if (id && blame->nannotated < blame->nlines) {
613 /* Annotate remaining non-annotated lines with last commit. */
614 for (lineno = 0; lineno < blame->nlines; lineno++) {
615 err = annotate_line(blame, lineno, id, cb, arg);
616 if (err)
617 goto done;
618 }
619 }
620
621done:
622 if (graph)
623 got_commit_graph_close(graph);
624 free(obj_id);
625 if (blob)
626 got_object_blob_close(blob);
627 if (err) {
628 if (blame)
629 blame_close(blame);
630 } else
631 *blamep = blame;
632
633 return err;
634}
635
636const struct got_error *
637got_blame(const char *path, struct got_object_id *commit_id,
638 struct got_repository *repo,
639 const struct got_error *(*cb)(void *, int, int, struct got_object_id *),
640 void *arg, got_cancel_cb cancel_cb, void* cancel_arg)
641{
642 const struct got_error *err = NULL((void *)0), *close_err = NULL((void *)0);
643 struct got_blame *blame;
644 char *abspath;
645
646 if (asprintf(&abspath, "%s%s", path[0] == '/' ? "" : "/", path) == -1)
647 return got_error_from_errno2("asprintf", path);
648
649 err = blame_open(&blame, abspath, commit_id, repo, cb, arg,
650 cancel_cb, cancel_arg);
651 free(abspath);
652 if (blame)
653 close_err = blame_close(blame);
654 return err ? err : close_err;
655}