1#include "cache.h"
2#include "tag.h"
3#include "commit.h"
4#include "tree.h"
5#include "blob.h"
6#include "epoch.h"
7#define SEEN (1u << 0)
9#define INTERESTING (1u << 1)
10#define COUNTED (1u << 2)
11#define SHOWN (1u << 3)
12static const char rev_list_usage[] =
14 "git-rev-list [OPTION] commit-id <commit-id>\n"
15 " --max-count=nr\n"
16 " --max-age=epoch\n"
17 " --min-age=epoch\n"
18 " --parents\n"
19 " --bisect\n"
20 " --objects\n"
21 " --unpacked\n"
22 " --header\n"
23 " --pretty\n"
24 " --no-merges\n"
25 " --merge-order [ --show-breaks ]\n"
26 " --topo-order";
27static int unpacked = 0;
29static int bisect_list = 0;
30static int tag_objects = 0;
31static int tree_objects = 0;
32static int blob_objects = 0;
33static int verbose_header = 0;
34static int show_parents = 0;
35static int hdr_termination = 0;
36static const char *commit_prefix = "";
37static unsigned long max_age = -1;
38static unsigned long min_age = -1;
39static int max_count = -1;
40static enum cmit_fmt commit_format = CMIT_FMT_RAW;
41static int merge_order = 0;
42static int show_breaks = 0;
43static int stop_traversal = 0;
44static int topo_order = 0;
45static int no_merges = 0;
46static void show_commit(struct commit *commit)
48{
49 commit->object.flags |= SHOWN;
50 if (show_breaks) {
51 commit_prefix = "| ";
52 if (commit->object.flags & DISCONTINUITY) {
53 commit_prefix = "^ ";
54 } else if (commit->object.flags & BOUNDARY) {
55 commit_prefix = "= ";
56 }
57 }
58 printf("%s%s", commit_prefix, sha1_to_hex(commit->object.sha1));
59 if (show_parents) {
60 struct commit_list *parents = commit->parents;
61 while (parents) {
62 printf(" %s", sha1_to_hex(parents->item->object.sha1));
63 parents = parents->next;
64 }
65 }
66 if (commit_format == CMIT_FMT_ONELINE)
67 putchar(' ');
68 else
69 putchar('\n');
70 if (verbose_header) {
72 static char pretty_header[16384];
73 pretty_print_commit(commit_format, commit->buffer, ~0, pretty_header, sizeof(pretty_header));
74 printf("%s%c", pretty_header, hdr_termination);
75 }
76 fflush(stdout);
77}
78static int filter_commit(struct commit * commit)
80{
81 if (stop_traversal && (commit->object.flags & BOUNDARY))
82 return STOP;
83 if (commit->object.flags & (UNINTERESTING|SHOWN))
84 return CONTINUE;
85 if (min_age != -1 && (commit->date > min_age))
86 return CONTINUE;
87 if (max_age != -1 && (commit->date < max_age)) {
88 stop_traversal=1;
89 return merge_order?CONTINUE:STOP;
90 }
91 if (max_count != -1 && !max_count--)
92 return STOP;
93 if (no_merges && (commit->parents && commit->parents->next))
94 return CONTINUE;
95 return DO;
96}
97static int process_commit(struct commit * commit)
99{
100 int action=filter_commit(commit);
101 if (action == STOP) {
103 return STOP;
104 }
105 if (action == CONTINUE) {
107 return CONTINUE;
108 }
109 show_commit(commit);
111 return CONTINUE;
113}
114static struct object_list **add_object(struct object *obj, struct object_list **p, const char *name)
116{
117 struct object_list *entry = xmalloc(sizeof(*entry));
118 entry->item = obj;
119 entry->next = *p;
120 entry->name = name;
121 *p = entry;
122 return &entry->next;
123}
124static struct object_list **process_blob(struct blob *blob, struct object_list **p, const char *name)
126{
127 struct object *obj = &blob->object;
128 if (!blob_objects)
130 return p;
131 if (obj->flags & (UNINTERESTING | SEEN))
132 return p;
133 obj->flags |= SEEN;
134 return add_object(obj, p, name);
135}
136static struct object_list **process_tree(struct tree *tree, struct object_list **p, const char *name)
138{
139 struct object *obj = &tree->object;
140 struct tree_entry_list *entry;
141 if (!tree_objects)
143 return p;
144 if (obj->flags & (UNINTERESTING | SEEN))
145 return p;
146 if (parse_tree(tree) < 0)
147 die("bad tree object %s", sha1_to_hex(obj->sha1));
148 obj->flags |= SEEN;
149 p = add_object(obj, p, name);
150 entry = tree->entries;
151 tree->entries = NULL;
152 while (entry) {
153 struct tree_entry_list *next = entry->next;
154 if (entry->directory)
155 p = process_tree(entry->item.tree, p, entry->name);
156 else
157 p = process_blob(entry->item.blob, p, entry->name);
158 free(entry);
159 entry = next;
160 }
161 return p;
162}
163static struct object_list *pending_objects = NULL;
165static void show_commit_list(struct commit_list *list)
167{
168 struct object_list *objects = NULL, **p = &objects, *pending;
169 while (list) {
170 struct commit *commit = pop_most_recent_commit(&list, SEEN);
171 p = process_tree(commit->tree, p, "");
173 if (process_commit(commit) == STOP)
174 break;
175 }
176 for (pending = pending_objects; pending; pending = pending->next) {
177 struct object *obj = pending->item;
178 const char *name = pending->name;
179 if (obj->flags & (UNINTERESTING | SEEN))
180 continue;
181 if (obj->type == tag_type) {
182 obj->flags |= SEEN;
183 p = add_object(obj, p, name);
184 continue;
185 }
186 if (obj->type == tree_type) {
187 p = process_tree((struct tree *)obj, p, name);
188 continue;
189 }
190 if (obj->type == blob_type) {
191 p = process_blob((struct blob *)obj, p, name);
192 continue;
193 }
194 die("unknown pending object %s (%s)", sha1_to_hex(obj->sha1), name);
195 }
196 while (objects) {
197 printf("%s %s\n", sha1_to_hex(objects->item->sha1), objects->name);
198 objects = objects->next;
199 }
200}
201static void mark_blob_uninteresting(struct blob *blob)
203{
204 if (!blob_objects)
205 return;
206 if (blob->object.flags & UNINTERESTING)
207 return;
208 blob->object.flags |= UNINTERESTING;
209}
210static void mark_tree_uninteresting(struct tree *tree)
212{
213 struct object *obj = &tree->object;
214 struct tree_entry_list *entry;
215 if (!tree_objects)
217 return;
218 if (obj->flags & UNINTERESTING)
219 return;
220 obj->flags |= UNINTERESTING;
221 if (!has_sha1_file(obj->sha1))
222 return;
223 if (parse_tree(tree) < 0)
224 die("bad tree %s", sha1_to_hex(obj->sha1));
225 entry = tree->entries;
226 tree->entries = NULL;
227 while (entry) {
228 struct tree_entry_list *next = entry->next;
229 if (entry->directory)
230 mark_tree_uninteresting(entry->item.tree);
231 else
232 mark_blob_uninteresting(entry->item.blob);
233 free(entry);
234 entry = next;
235 }
236}
237static void mark_parents_uninteresting(struct commit *commit)
239{
240 struct commit_list *parents = commit->parents;
241 while (parents) {
243 struct commit *commit = parents->item;
244 commit->object.flags |= UNINTERESTING;
245 /*
247 * Normally we haven't parsed the parent
248 * yet, so we won't have a parent of a parent
249 * here. However, it may turn out that we've
250 * reached this commit some other way (where it
251 * wasn't uninteresting), in which case we need
252 * to mark its parents recursively too..
253 */
254 if (commit->parents)
255 mark_parents_uninteresting(commit);
256 /*
258 * A missing commit is ok iff its parent is marked
259 * uninteresting.
260 *
261 * We just mark such a thing parsed, so that when
262 * it is popped next time around, we won't be trying
263 * to parse it and get an error.
264 */
265 if (!has_sha1_file(commit->object.sha1))
266 commit->object.parsed = 1;
267 parents = parents->next;
268 }
269}
270static int everybody_uninteresting(struct commit_list *orig)
272{
273 struct commit_list *list = orig;
274 while (list) {
275 struct commit *commit = list->item;
276 list = list->next;
277 if (commit->object.flags & UNINTERESTING)
278 continue;
279 return 0;
280 }
281 return 1;
282}
283/*
285 * This is a truly stupid algorithm, but it's only
286 * used for bisection, and we just don't care enough.
287 *
288 * We care just barely enough to avoid recursing for
289 * non-merge entries.
290 */
291static int count_distance(struct commit_list *entry)
292{
293 int nr = 0;
294 while (entry) {
296 struct commit *commit = entry->item;
297 struct commit_list *p;
298 if (commit->object.flags & (UNINTERESTING | COUNTED))
300 break;
301 nr++;
302 commit->object.flags |= COUNTED;
303 p = commit->parents;
304 entry = p;
305 if (p) {
306 p = p->next;
307 while (p) {
308 nr += count_distance(p);
309 p = p->next;
310 }
311 }
312 }
313 return nr;
314}
315static void clear_distance(struct commit_list *list)
317{
318 while (list) {
319 struct commit *commit = list->item;
320 commit->object.flags &= ~COUNTED;
321 list = list->next;
322 }
323}
324static struct commit_list *find_bisection(struct commit_list *list)
326{
327 int nr, closest;
328 struct commit_list *p, *best;
329 nr = 0;
331 p = list;
332 while (p) {
333 nr++;
334 p = p->next;
335 }
336 closest = 0;
337 best = list;
338 p = list;
340 while (p) {
341 int distance = count_distance(p);
342 clear_distance(list);
343 if (nr - distance < distance)
344 distance = nr - distance;
345 if (distance > closest) {
346 best = p;
347 closest = distance;
348 }
349 p = p->next;
350 }
351 if (best)
352 best->next = NULL;
353 return best;
354}
355static void mark_edges_uninteresting(struct commit_list *list)
357{
358 for ( ; list; list = list->next) {
359 struct commit_list *parents = list->item->parents;
360 for ( ; parents; parents = parents->next) {
362 struct commit *commit = parents->item;
363 if (commit->object.flags & UNINTERESTING)
364 mark_tree_uninteresting(commit->tree);
365 }
366 }
367}
368static struct commit_list *limit_list(struct commit_list *list)
370{
371 struct commit_list *newlist = NULL;
372 struct commit_list **p = &newlist;
373 while (list) {
374 struct commit *commit = pop_most_recent_commit(&list, SEEN);
375 struct object *obj = &commit->object;
376 if (unpacked && has_sha1_pack(obj->sha1))
378 obj->flags |= UNINTERESTING;
379 if (obj->flags & UNINTERESTING) {
380 mark_parents_uninteresting(commit);
381 if (everybody_uninteresting(list))
382 break;
383 continue;
384 }
385 p = &commit_list_insert(commit, p)->next;
386 }
387 if (tree_objects)
388 mark_edges_uninteresting(newlist);
389 if (bisect_list)
390 newlist = find_bisection(newlist);
391 return newlist;
392}
393static void add_pending_object(struct object *obj, const char *name)
395{
396 add_object(obj, &pending_objects, name);
397}
398static struct commit *get_commit_reference(const char *name, unsigned int flags)
400{
401 unsigned char sha1[20];
402 struct object *object;
403 if (get_sha1(name, sha1))
405 usage(rev_list_usage);
406 object = parse_object(sha1);
407 if (!object)
408 die("bad object %s", name);
409 /*
411 * Tag object? Look what it points to..
412 */
413 while (object->type == tag_type) {
414 struct tag *tag = (struct tag *) object;
415 object->flags |= flags;
416 if (tag_objects && !(object->flags & UNINTERESTING))
417 add_pending_object(object, tag->tag);
418 object = parse_object(tag->tagged->sha1);
419 if (!object)
420 die("bad object %s", sha1_to_hex(tag->tagged->sha1));
421 }
422 /*
424 * Commit object? Just return it, we'll do all the complex
425 * reachability crud.
426 */
427 if (object->type == commit_type) {
428 struct commit *commit = (struct commit *)object;
429 object->flags |= flags;
430 if (parse_commit(commit) < 0)
431 die("unable to parse commit %s", name);
432 if (flags & UNINTERESTING)
433 mark_parents_uninteresting(commit);
434 return commit;
435 }
436 /*
438 * Tree object? Either mark it uniniteresting, or add it
439 * to the list of objects to look at later..
440 */
441 if (object->type == tree_type) {
442 struct tree *tree = (struct tree *)object;
443 if (!tree_objects)
444 return NULL;
445 if (flags & UNINTERESTING) {
446 mark_tree_uninteresting(tree);
447 return NULL;
448 }
449 add_pending_object(object, "");
450 return NULL;
451 }
452 /*
454 * Blob object? You know the drill by now..
455 */
456 if (object->type == blob_type) {
457 struct blob *blob = (struct blob *)object;
458 if (!blob_objects)
459 return NULL;
460 if (flags & UNINTERESTING) {
461 mark_blob_uninteresting(blob);
462 return NULL;
463 }
464 add_pending_object(object, "");
465 return NULL;
466 }
467 die("%s is unknown object", name);
468}
469static void handle_one_commit(struct commit *com, struct commit_list **lst)
471{
472 if (!com || com->object.flags & SEEN)
473 return;
474 com->object.flags |= SEEN;
475 commit_list_insert(com, lst);
476}
477int main(int argc, char **argv)
480{
481 struct commit_list *list = NULL;
482 int i, limited = 0;
483 setup_git_directory();
485 for (i = 1 ; i < argc; i++) {
486 int flags;
487 char *arg = argv[i];
488 char *dotdot;
489 struct commit *commit;
490 if (!strncmp(arg, "--max-count=", 12)) {
492 max_count = atoi(arg + 12);
493 continue;
494 }
495 if (!strncmp(arg, "--max-age=", 10)) {
496 max_age = atoi(arg + 10);
497 continue;
498 }
499 if (!strncmp(arg, "--min-age=", 10)) {
500 min_age = atoi(arg + 10);
501 continue;
502 }
503 if (!strcmp(arg, "--header")) {
504 verbose_header = 1;
505 continue;
506 }
507 if (!strncmp(arg, "--pretty", 8)) {
508 commit_format = get_commit_format(arg+8);
509 verbose_header = 1;
510 hdr_termination = '\n';
511 if (commit_format == CMIT_FMT_ONELINE)
512 commit_prefix = "";
513 else
514 commit_prefix = "commit ";
515 continue;
516 }
517 if (!strncmp(arg, "--no-merges", 11)) {
518 no_merges = 1;
519 continue;
520 }
521 if (!strcmp(arg, "--parents")) {
522 show_parents = 1;
523 continue;
524 }
525 if (!strcmp(arg, "--bisect")) {
526 bisect_list = 1;
527 continue;
528 }
529 if (!strcmp(arg, "--objects")) {
530 tag_objects = 1;
531 tree_objects = 1;
532 blob_objects = 1;
533 continue;
534 }
535 if (!strcmp(arg, "--unpacked")) {
536 unpacked = 1;
537 limited = 1;
538 continue;
539 }
540 if (!strcmp(arg, "--merge-order")) {
541 merge_order = 1;
542 continue;
543 }
544 if (!strcmp(arg, "--show-breaks")) {
545 show_breaks = 1;
546 continue;
547 }
548 if (!strcmp(arg, "--topo-order")) {
549 topo_order = 1;
550 limited = 1;
551 continue;
552 }
553 if (show_breaks && !merge_order)
555 usage(rev_list_usage);
556 flags = 0;
558 dotdot = strstr(arg, "..");
559 if (dotdot) {
560 char *next = dotdot + 2;
561 struct commit *exclude = NULL;
562 struct commit *include = NULL;
563 *dotdot = 0;
564 exclude = get_commit_reference(arg, UNINTERESTING);
565 include = get_commit_reference(next, 0);
566 if (exclude && include) {
567 limited = 1;
568 handle_one_commit(exclude, &list);
569 handle_one_commit(include, &list);
570 continue;
571 }
572 *next = '.';
573 }
574 if (*arg == '^') {
575 flags = UNINTERESTING;
576 arg++;
577 limited = 1;
578 }
579 commit = get_commit_reference(arg, flags);
580 handle_one_commit(commit, &list);
581 }
582 save_commit_buffer = verbose_header;
584 track_object_refs = 0;
585 if (!merge_order) {
587 sort_by_date(&list);
588 if (limited)
589 list = limit_list(list);
590 if (topo_order)
591 sort_in_topological_order(&list);
592 show_commit_list(list);
593 } else {
594#ifndef NO_OPENSSL
595 if (sort_list_in_merge_order(list, &process_commit)) {
596 die("merge order sort failed\n");
597 }
598#else
599 die("merge order sort unsupported, OpenSSL not linked");
600#endif
601 }
602 return 0;
604}