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Commit | Line | Data |
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a2ad79ce CC |
1 | #include "cache.h" |
2 | #include "commit.h" | |
3 | #include "diff.h" | |
4 | #include "revision.h" | |
1bf072e3 CC |
5 | #include "refs.h" |
6 | #include "list-objects.h" | |
3b437b0d | 7 | #include "quote.h" |
4eb5b646 | 8 | #include "sha1-lookup.h" |
ef24c7ca | 9 | #include "run-command.h" |
a2ad79ce CC |
10 | #include "bisect.h" |
11 | ||
6212b1aa CC |
12 | struct sha1_array { |
13 | unsigned char (*sha1)[20]; | |
14 | int sha1_nr; | |
15 | int sha1_alloc; | |
16 | }; | |
17 | ||
fad2d31d | 18 | static struct sha1_array good_revs; |
6212b1aa | 19 | static struct sha1_array skipped_revs; |
1bf072e3 | 20 | |
ef24c7ca CC |
21 | static const unsigned char *current_bad_sha1; |
22 | ||
1c953a1f CC |
23 | struct argv_array { |
24 | const char **argv; | |
25 | int argv_nr; | |
26 | int argv_alloc; | |
27 | }; | |
28 | ||
29 | struct argv_array rev_argv; | |
30 | ||
ef24c7ca CC |
31 | static const char *argv_diff_tree[] = {"diff-tree", "--pretty", NULL, NULL}; |
32 | static const char *argv_checkout[] = {"checkout", "-q", NULL, "--", NULL}; | |
33 | static const char *argv_show_branch[] = {"show-branch", NULL, NULL}; | |
34 | ||
a2ad79ce CC |
35 | /* bits #0-15 in revision.h */ |
36 | ||
37 | #define COUNTED (1u<<16) | |
38 | ||
39 | /* | |
40 | * This is a truly stupid algorithm, but it's only | |
41 | * used for bisection, and we just don't care enough. | |
42 | * | |
43 | * We care just barely enough to avoid recursing for | |
44 | * non-merge entries. | |
45 | */ | |
46 | static int count_distance(struct commit_list *entry) | |
47 | { | |
48 | int nr = 0; | |
49 | ||
50 | while (entry) { | |
51 | struct commit *commit = entry->item; | |
52 | struct commit_list *p; | |
53 | ||
54 | if (commit->object.flags & (UNINTERESTING | COUNTED)) | |
55 | break; | |
56 | if (!(commit->object.flags & TREESAME)) | |
57 | nr++; | |
58 | commit->object.flags |= COUNTED; | |
59 | p = commit->parents; | |
60 | entry = p; | |
61 | if (p) { | |
62 | p = p->next; | |
63 | while (p) { | |
64 | nr += count_distance(p); | |
65 | p = p->next; | |
66 | } | |
67 | } | |
68 | } | |
69 | ||
70 | return nr; | |
71 | } | |
72 | ||
73 | static void clear_distance(struct commit_list *list) | |
74 | { | |
75 | while (list) { | |
76 | struct commit *commit = list->item; | |
77 | commit->object.flags &= ~COUNTED; | |
78 | list = list->next; | |
79 | } | |
80 | } | |
81 | ||
82 | #define DEBUG_BISECT 0 | |
83 | ||
84 | static inline int weight(struct commit_list *elem) | |
85 | { | |
86 | return *((int*)(elem->item->util)); | |
87 | } | |
88 | ||
89 | static inline void weight_set(struct commit_list *elem, int weight) | |
90 | { | |
91 | *((int*)(elem->item->util)) = weight; | |
92 | } | |
93 | ||
94 | static int count_interesting_parents(struct commit *commit) | |
95 | { | |
96 | struct commit_list *p; | |
97 | int count; | |
98 | ||
99 | for (count = 0, p = commit->parents; p; p = p->next) { | |
100 | if (p->item->object.flags & UNINTERESTING) | |
101 | continue; | |
102 | count++; | |
103 | } | |
104 | return count; | |
105 | } | |
106 | ||
107 | static inline int halfway(struct commit_list *p, int nr) | |
108 | { | |
109 | /* | |
110 | * Don't short-cut something we are not going to return! | |
111 | */ | |
112 | if (p->item->object.flags & TREESAME) | |
113 | return 0; | |
114 | if (DEBUG_BISECT) | |
115 | return 0; | |
116 | /* | |
117 | * 2 and 3 are halfway of 5. | |
118 | * 3 is halfway of 6 but 2 and 4 are not. | |
119 | */ | |
120 | switch (2 * weight(p) - nr) { | |
121 | case -1: case 0: case 1: | |
122 | return 1; | |
123 | default: | |
124 | return 0; | |
125 | } | |
126 | } | |
127 | ||
128 | #if !DEBUG_BISECT | |
129 | #define show_list(a,b,c,d) do { ; } while (0) | |
130 | #else | |
131 | static void show_list(const char *debug, int counted, int nr, | |
132 | struct commit_list *list) | |
133 | { | |
134 | struct commit_list *p; | |
135 | ||
136 | fprintf(stderr, "%s (%d/%d)\n", debug, counted, nr); | |
137 | ||
138 | for (p = list; p; p = p->next) { | |
139 | struct commit_list *pp; | |
140 | struct commit *commit = p->item; | |
141 | unsigned flags = commit->object.flags; | |
142 | enum object_type type; | |
143 | unsigned long size; | |
144 | char *buf = read_sha1_file(commit->object.sha1, &type, &size); | |
145 | char *ep, *sp; | |
146 | ||
147 | fprintf(stderr, "%c%c%c ", | |
148 | (flags & TREESAME) ? ' ' : 'T', | |
149 | (flags & UNINTERESTING) ? 'U' : ' ', | |
150 | (flags & COUNTED) ? 'C' : ' '); | |
151 | if (commit->util) | |
152 | fprintf(stderr, "%3d", weight(p)); | |
153 | else | |
154 | fprintf(stderr, "---"); | |
155 | fprintf(stderr, " %.*s", 8, sha1_to_hex(commit->object.sha1)); | |
156 | for (pp = commit->parents; pp; pp = pp->next) | |
157 | fprintf(stderr, " %.*s", 8, | |
158 | sha1_to_hex(pp->item->object.sha1)); | |
159 | ||
160 | sp = strstr(buf, "\n\n"); | |
161 | if (sp) { | |
162 | sp += 2; | |
163 | for (ep = sp; *ep && *ep != '\n'; ep++) | |
164 | ; | |
165 | fprintf(stderr, " %.*s", (int)(ep - sp), sp); | |
166 | } | |
167 | fprintf(stderr, "\n"); | |
168 | } | |
169 | } | |
170 | #endif /* DEBUG_BISECT */ | |
171 | ||
172 | static struct commit_list *best_bisection(struct commit_list *list, int nr) | |
173 | { | |
174 | struct commit_list *p, *best; | |
175 | int best_distance = -1; | |
176 | ||
177 | best = list; | |
178 | for (p = list; p; p = p->next) { | |
179 | int distance; | |
180 | unsigned flags = p->item->object.flags; | |
181 | ||
182 | if (flags & TREESAME) | |
183 | continue; | |
184 | distance = weight(p); | |
185 | if (nr - distance < distance) | |
186 | distance = nr - distance; | |
187 | if (distance > best_distance) { | |
188 | best = p; | |
189 | best_distance = distance; | |
190 | } | |
191 | } | |
192 | ||
193 | return best; | |
194 | } | |
195 | ||
196 | struct commit_dist { | |
197 | struct commit *commit; | |
198 | int distance; | |
199 | }; | |
200 | ||
201 | static int compare_commit_dist(const void *a_, const void *b_) | |
202 | { | |
203 | struct commit_dist *a, *b; | |
204 | ||
205 | a = (struct commit_dist *)a_; | |
206 | b = (struct commit_dist *)b_; | |
207 | if (a->distance != b->distance) | |
208 | return b->distance - a->distance; /* desc sort */ | |
209 | return hashcmp(a->commit->object.sha1, b->commit->object.sha1); | |
210 | } | |
211 | ||
212 | static struct commit_list *best_bisection_sorted(struct commit_list *list, int nr) | |
213 | { | |
214 | struct commit_list *p; | |
215 | struct commit_dist *array = xcalloc(nr, sizeof(*array)); | |
216 | int cnt, i; | |
217 | ||
218 | for (p = list, cnt = 0; p; p = p->next) { | |
219 | int distance; | |
220 | unsigned flags = p->item->object.flags; | |
221 | ||
222 | if (flags & TREESAME) | |
223 | continue; | |
224 | distance = weight(p); | |
225 | if (nr - distance < distance) | |
226 | distance = nr - distance; | |
227 | array[cnt].commit = p->item; | |
228 | array[cnt].distance = distance; | |
229 | cnt++; | |
230 | } | |
231 | qsort(array, cnt, sizeof(*array), compare_commit_dist); | |
232 | for (p = list, i = 0; i < cnt; i++) { | |
233 | struct name_decoration *r = xmalloc(sizeof(*r) + 100); | |
234 | struct object *obj = &(array[i].commit->object); | |
235 | ||
236 | sprintf(r->name, "dist=%d", array[i].distance); | |
237 | r->next = add_decoration(&name_decoration, obj, r); | |
238 | p->item = array[i].commit; | |
239 | p = p->next; | |
240 | } | |
241 | if (p) | |
242 | p->next = NULL; | |
243 | free(array); | |
244 | return list; | |
245 | } | |
246 | ||
247 | /* | |
248 | * zero or positive weight is the number of interesting commits it can | |
249 | * reach, including itself. Especially, weight = 0 means it does not | |
250 | * reach any tree-changing commits (e.g. just above uninteresting one | |
251 | * but traversal is with pathspec). | |
252 | * | |
253 | * weight = -1 means it has one parent and its distance is yet to | |
254 | * be computed. | |
255 | * | |
256 | * weight = -2 means it has more than one parent and its distance is | |
257 | * unknown. After running count_distance() first, they will get zero | |
258 | * or positive distance. | |
259 | */ | |
260 | static struct commit_list *do_find_bisection(struct commit_list *list, | |
261 | int nr, int *weights, | |
262 | int find_all) | |
263 | { | |
264 | int n, counted; | |
265 | struct commit_list *p; | |
266 | ||
267 | counted = 0; | |
268 | ||
269 | for (n = 0, p = list; p; p = p->next) { | |
270 | struct commit *commit = p->item; | |
271 | unsigned flags = commit->object.flags; | |
272 | ||
273 | p->item->util = &weights[n++]; | |
274 | switch (count_interesting_parents(commit)) { | |
275 | case 0: | |
276 | if (!(flags & TREESAME)) { | |
277 | weight_set(p, 1); | |
278 | counted++; | |
279 | show_list("bisection 2 count one", | |
280 | counted, nr, list); | |
281 | } | |
282 | /* | |
283 | * otherwise, it is known not to reach any | |
284 | * tree-changing commit and gets weight 0. | |
285 | */ | |
286 | break; | |
287 | case 1: | |
288 | weight_set(p, -1); | |
289 | break; | |
290 | default: | |
291 | weight_set(p, -2); | |
292 | break; | |
293 | } | |
294 | } | |
295 | ||
296 | show_list("bisection 2 initialize", counted, nr, list); | |
297 | ||
298 | /* | |
299 | * If you have only one parent in the resulting set | |
300 | * then you can reach one commit more than that parent | |
301 | * can reach. So we do not have to run the expensive | |
302 | * count_distance() for single strand of pearls. | |
303 | * | |
304 | * However, if you have more than one parents, you cannot | |
305 | * just add their distance and one for yourself, since | |
306 | * they usually reach the same ancestor and you would | |
307 | * end up counting them twice that way. | |
308 | * | |
309 | * So we will first count distance of merges the usual | |
310 | * way, and then fill the blanks using cheaper algorithm. | |
311 | */ | |
312 | for (p = list; p; p = p->next) { | |
313 | if (p->item->object.flags & UNINTERESTING) | |
314 | continue; | |
315 | if (weight(p) != -2) | |
316 | continue; | |
317 | weight_set(p, count_distance(p)); | |
318 | clear_distance(list); | |
319 | ||
320 | /* Does it happen to be at exactly half-way? */ | |
321 | if (!find_all && halfway(p, nr)) | |
322 | return p; | |
323 | counted++; | |
324 | } | |
325 | ||
326 | show_list("bisection 2 count_distance", counted, nr, list); | |
327 | ||
328 | while (counted < nr) { | |
329 | for (p = list; p; p = p->next) { | |
330 | struct commit_list *q; | |
331 | unsigned flags = p->item->object.flags; | |
332 | ||
333 | if (0 <= weight(p)) | |
334 | continue; | |
335 | for (q = p->item->parents; q; q = q->next) { | |
336 | if (q->item->object.flags & UNINTERESTING) | |
337 | continue; | |
338 | if (0 <= weight(q)) | |
339 | break; | |
340 | } | |
341 | if (!q) | |
342 | continue; | |
343 | ||
344 | /* | |
345 | * weight for p is unknown but q is known. | |
346 | * add one for p itself if p is to be counted, | |
347 | * otherwise inherit it from q directly. | |
348 | */ | |
349 | if (!(flags & TREESAME)) { | |
350 | weight_set(p, weight(q)+1); | |
351 | counted++; | |
352 | show_list("bisection 2 count one", | |
353 | counted, nr, list); | |
354 | } | |
355 | else | |
356 | weight_set(p, weight(q)); | |
357 | ||
358 | /* Does it happen to be at exactly half-way? */ | |
359 | if (!find_all && halfway(p, nr)) | |
360 | return p; | |
361 | } | |
362 | } | |
363 | ||
364 | show_list("bisection 2 counted all", counted, nr, list); | |
365 | ||
366 | if (!find_all) | |
367 | return best_bisection(list, nr); | |
368 | else | |
369 | return best_bisection_sorted(list, nr); | |
370 | } | |
371 | ||
372 | struct commit_list *find_bisection(struct commit_list *list, | |
373 | int *reaches, int *all, | |
374 | int find_all) | |
375 | { | |
376 | int nr, on_list; | |
377 | struct commit_list *p, *best, *next, *last; | |
378 | int *weights; | |
379 | ||
380 | show_list("bisection 2 entry", 0, 0, list); | |
381 | ||
382 | /* | |
383 | * Count the number of total and tree-changing items on the | |
384 | * list, while reversing the list. | |
385 | */ | |
386 | for (nr = on_list = 0, last = NULL, p = list; | |
387 | p; | |
388 | p = next) { | |
389 | unsigned flags = p->item->object.flags; | |
390 | ||
391 | next = p->next; | |
392 | if (flags & UNINTERESTING) | |
393 | continue; | |
394 | p->next = last; | |
395 | last = p; | |
396 | if (!(flags & TREESAME)) | |
397 | nr++; | |
398 | on_list++; | |
399 | } | |
400 | list = last; | |
401 | show_list("bisection 2 sorted", 0, nr, list); | |
402 | ||
403 | *all = nr; | |
404 | weights = xcalloc(on_list, sizeof(*weights)); | |
405 | ||
406 | /* Do the real work of finding bisection commit. */ | |
407 | best = do_find_bisection(list, nr, weights, find_all); | |
408 | if (best) { | |
409 | if (!find_all) | |
410 | best->next = NULL; | |
411 | *reaches = weight(best); | |
412 | } | |
413 | free(weights); | |
414 | return best; | |
415 | } | |
416 | ||
1c953a1f | 417 | static void argv_array_push(struct argv_array *array, const char *string) |
3755ccdb | 418 | { |
1c953a1f CC |
419 | ALLOC_GROW(array->argv, array->argv_nr + 1, array->argv_alloc); |
420 | array->argv[array->argv_nr++] = string; | |
421 | } | |
3755ccdb | 422 | |
1c953a1f CC |
423 | static void argv_array_push_sha1(struct argv_array *array, |
424 | const unsigned char *sha1, | |
425 | const char *format) | |
426 | { | |
427 | struct strbuf buf = STRBUF_INIT; | |
3755ccdb | 428 | strbuf_addf(&buf, format, sha1_to_hex(sha1)); |
1c953a1f | 429 | argv_array_push(array, strbuf_detach(&buf, NULL)); |
3755ccdb CC |
430 | } |
431 | ||
fad2d31d CC |
432 | static void sha1_array_push(struct sha1_array *array, |
433 | const unsigned char *sha1) | |
434 | { | |
435 | ALLOC_GROW(array->sha1, array->sha1_nr + 1, array->sha1_alloc); | |
436 | hashcpy(array->sha1[array->sha1_nr++], sha1); | |
437 | } | |
438 | ||
1bf072e3 CC |
439 | static int register_ref(const char *refname, const unsigned char *sha1, |
440 | int flags, void *cb_data) | |
441 | { | |
442 | if (!strcmp(refname, "bad")) { | |
ef24c7ca | 443 | current_bad_sha1 = sha1; |
1bf072e3 | 444 | } else if (!prefixcmp(refname, "good-")) { |
fad2d31d | 445 | sha1_array_push(&good_revs, sha1); |
1bf072e3 | 446 | } else if (!prefixcmp(refname, "skip-")) { |
fad2d31d | 447 | sha1_array_push(&skipped_revs, sha1); |
1bf072e3 CC |
448 | } |
449 | ||
450 | return 0; | |
451 | } | |
452 | ||
453 | static int read_bisect_refs(void) | |
454 | { | |
455 | return for_each_ref_in("refs/bisect/", register_ref, NULL); | |
456 | } | |
457 | ||
1c953a1f | 458 | void read_bisect_paths(struct argv_array *array) |
3b437b0d CC |
459 | { |
460 | struct strbuf str = STRBUF_INIT; | |
461 | const char *filename = git_path("BISECT_NAMES"); | |
462 | FILE *fp = fopen(filename, "r"); | |
463 | ||
464 | if (!fp) | |
465 | die("Could not open file '%s': %s", filename, strerror(errno)); | |
466 | ||
467 | while (strbuf_getline(&str, fp, '\n') != EOF) { | |
468 | char *quoted; | |
469 | int res; | |
470 | ||
471 | strbuf_trim(&str); | |
472 | quoted = strbuf_detach(&str, NULL); | |
1c953a1f CC |
473 | res = sq_dequote_to_argv(quoted, &array->argv, |
474 | &array->argv_nr, &array->argv_alloc); | |
3b437b0d CC |
475 | if (res) |
476 | die("Badly quoted content in file '%s': %s", | |
477 | filename, quoted); | |
478 | } | |
479 | ||
480 | strbuf_release(&str); | |
481 | fclose(fp); | |
482 | } | |
483 | ||
95188648 CC |
484 | static int skipcmp(const void *a, const void *b) |
485 | { | |
486 | return hashcmp(a, b); | |
487 | } | |
488 | ||
489 | static void prepare_skipped(void) | |
490 | { | |
6212b1aa CC |
491 | qsort(skipped_revs.sha1, skipped_revs.sha1_nr, |
492 | sizeof(*skipped_revs.sha1), skipcmp); | |
95188648 CC |
493 | } |
494 | ||
4eb5b646 CC |
495 | static const unsigned char *skipped_sha1_access(size_t index, void *table) |
496 | { | |
497 | unsigned char (*skipped)[20] = table; | |
498 | return skipped[index]; | |
499 | } | |
500 | ||
95188648 CC |
501 | static int lookup_skipped(unsigned char *sha1) |
502 | { | |
6212b1aa | 503 | return sha1_pos(sha1, skipped_revs.sha1, skipped_revs.sha1_nr, |
4eb5b646 | 504 | skipped_sha1_access); |
95188648 CC |
505 | } |
506 | ||
507 | struct commit_list *filter_skipped(struct commit_list *list, | |
508 | struct commit_list **tried, | |
509 | int show_all) | |
510 | { | |
511 | struct commit_list *filtered = NULL, **f = &filtered; | |
512 | ||
513 | *tried = NULL; | |
514 | ||
6212b1aa | 515 | if (!skipped_revs.sha1_nr) |
95188648 CC |
516 | return list; |
517 | ||
518 | prepare_skipped(); | |
519 | ||
520 | while (list) { | |
521 | struct commit_list *next = list->next; | |
522 | list->next = NULL; | |
523 | if (0 <= lookup_skipped(list->item->object.sha1)) { | |
524 | /* Move current to tried list */ | |
525 | *tried = list; | |
526 | tried = &list->next; | |
527 | } else { | |
528 | if (!show_all) | |
529 | return list; | |
530 | /* Move current to filtered list */ | |
531 | *f = list; | |
532 | f = &list->next; | |
533 | } | |
534 | list = next; | |
535 | } | |
536 | ||
537 | return filtered; | |
538 | } | |
1bf072e3 | 539 | |
3b437b0d | 540 | static void bisect_rev_setup(struct rev_info *revs, const char *prefix) |
1bf072e3 | 541 | { |
fad2d31d CC |
542 | int i; |
543 | ||
3b437b0d CC |
544 | init_revisions(revs, prefix); |
545 | revs->abbrev = 0; | |
546 | revs->commit_format = CMIT_FMT_UNSPECIFIED; | |
1bf072e3 | 547 | |
fad2d31d CC |
548 | if (read_bisect_refs()) |
549 | die("reading bisect refs failed"); | |
550 | ||
1c953a1f CC |
551 | /* rev_argv.argv[0] will be ignored by setup_revisions */ |
552 | argv_array_push(&rev_argv, xstrdup("bisect_rev_setup")); | |
553 | argv_array_push_sha1(&rev_argv, current_bad_sha1, "%s"); | |
fad2d31d | 554 | for (i = 0; i < good_revs.sha1_nr; i++) |
1c953a1f CC |
555 | argv_array_push_sha1(&rev_argv, good_revs.sha1[i], "^%s"); |
556 | argv_array_push(&rev_argv, xstrdup("--")); | |
557 | read_bisect_paths(&rev_argv); | |
558 | argv_array_push(&rev_argv, NULL); | |
3b437b0d | 559 | |
1c953a1f | 560 | setup_revisions(rev_argv.argv_nr, rev_argv.argv, revs, NULL); |
3b437b0d CC |
561 | revs->limited = 1; |
562 | } | |
563 | ||
2ace9727 CC |
564 | static void bisect_common(struct rev_info *revs, const char *prefix, |
565 | int *reaches, int *all) | |
566 | { | |
567 | bisect_rev_setup(revs, prefix); | |
568 | ||
569 | if (prepare_revision_walk(revs)) | |
570 | die("revision walk setup failed"); | |
571 | if (revs->tree_objects) | |
572 | mark_edges_uninteresting(revs->commits, revs, NULL); | |
573 | ||
574 | revs->commits = find_bisection(revs->commits, reaches, all, | |
6212b1aa | 575 | !!skipped_revs.sha1_nr); |
2ace9727 CC |
576 | } |
577 | ||
ef24c7ca CC |
578 | static void exit_if_skipped_commits(struct commit_list *tried, |
579 | const unsigned char *bad) | |
580 | { | |
581 | if (!tried) | |
582 | return; | |
583 | ||
584 | printf("There are only 'skip'ped commits left to test.\n" | |
585 | "The first bad commit could be any of:\n"); | |
586 | print_commit_list(tried, "%s\n", "%s\n"); | |
587 | if (bad) | |
588 | printf("%s\n", sha1_to_hex(bad)); | |
589 | printf("We cannot bisect more!\n"); | |
590 | exit(2); | |
591 | } | |
592 | ||
593 | static void mark_expected_rev(char *bisect_rev_hex) | |
594 | { | |
595 | int len = strlen(bisect_rev_hex); | |
596 | const char *filename = git_path("BISECT_EXPECTED_REV"); | |
597 | int fd = open(filename, O_CREAT | O_TRUNC | O_WRONLY, 0600); | |
598 | ||
599 | if (fd < 0) | |
600 | die("could not create file '%s': %s", | |
601 | filename, strerror(errno)); | |
602 | ||
603 | bisect_rev_hex[len] = '\n'; | |
604 | write_or_die(fd, bisect_rev_hex, len + 1); | |
605 | bisect_rev_hex[len] = '\0'; | |
606 | ||
607 | if (close(fd) < 0) | |
608 | die("closing file %s: %s", filename, strerror(errno)); | |
609 | } | |
610 | ||
611 | static int bisect_checkout(char *bisect_rev_hex) | |
612 | { | |
613 | int res; | |
614 | ||
615 | mark_expected_rev(bisect_rev_hex); | |
616 | ||
617 | argv_checkout[2] = bisect_rev_hex; | |
618 | res = run_command_v_opt(argv_checkout, RUN_GIT_CMD); | |
619 | if (res) | |
620 | exit(res); | |
621 | ||
622 | argv_show_branch[1] = bisect_rev_hex; | |
623 | return run_command_v_opt(argv_show_branch, RUN_GIT_CMD); | |
624 | } | |
625 | ||
626 | /* | |
627 | * We use the convention that exiting with an exit code 10 means that | |
628 | * the bisection process finished successfully. | |
629 | * In this case the calling shell script should exit 0. | |
630 | */ | |
631 | int bisect_next_exit(const char *prefix) | |
632 | { | |
633 | struct rev_info revs; | |
634 | struct commit_list *tried; | |
635 | int reaches = 0, all = 0, nr; | |
636 | const unsigned char *bisect_rev; | |
637 | char bisect_rev_hex[41]; | |
638 | ||
639 | bisect_common(&revs, prefix, &reaches, &all); | |
640 | ||
641 | revs.commits = filter_skipped(revs.commits, &tried, 0); | |
642 | ||
643 | if (!revs.commits) { | |
644 | /* | |
645 | * We should exit here only if the "bad" | |
646 | * commit is also a "skip" commit. | |
647 | */ | |
648 | exit_if_skipped_commits(tried, NULL); | |
649 | ||
650 | printf("%s was both good and bad\n", | |
651 | sha1_to_hex(current_bad_sha1)); | |
652 | exit(1); | |
653 | } | |
654 | ||
655 | bisect_rev = revs.commits->item->object.sha1; | |
656 | memcpy(bisect_rev_hex, sha1_to_hex(bisect_rev), 41); | |
657 | ||
658 | if (!hashcmp(bisect_rev, current_bad_sha1)) { | |
659 | exit_if_skipped_commits(tried, current_bad_sha1); | |
660 | printf("%s is first bad commit\n", bisect_rev_hex); | |
661 | argv_diff_tree[2] = bisect_rev_hex; | |
662 | run_command_v_opt(argv_diff_tree, RUN_GIT_CMD); | |
663 | /* This means the bisection process succeeded. */ | |
664 | exit(10); | |
665 | } | |
666 | ||
667 | nr = all - reaches - 1; | |
668 | printf("Bisecting: %d revisions left to test after this " | |
669 | "(roughly %d steps)\n", nr, estimate_bisect_steps(all)); | |
670 | ||
671 | return bisect_checkout(bisect_rev_hex); | |
672 | } | |
673 |