Make networking commands to work from a subdirectory.
[git] / rev-list.c
1 #include "cache.h"
2 #include "refs.h"
3 #include "tag.h"
4 #include "commit.h"
5 #include "tree.h"
6 #include "blob.h"
7 #include "epoch.h"
8 #include "diff.h"
9
10 #define SEEN            (1u << 0)
11 #define INTERESTING     (1u << 1)
12 #define COUNTED         (1u << 2)
13 #define SHOWN           (1u << 3)
14 #define TREECHANGE      (1u << 4)
15
16 static const char rev_list_usage[] =
17 "git-rev-list [OPTION] <commit-id>... [ -- paths... ]\n"
18 "  limiting output:\n"
19 "    --max-count=nr\n"
20 "    --max-age=epoch\n"
21 "    --min-age=epoch\n"
22 "    --sparse\n"
23 "    --no-merges\n"
24 "    --all\n"
25 "  ordering output:\n"
26 "    --merge-order [ --show-breaks ]\n"
27 "    --topo-order\n"
28 "  formatting output:\n"
29 "    --parents\n"
30 "    --objects\n"
31 "    --unpacked\n"
32 "    --header | --pretty\n"
33 "  special purpose:\n"
34 "    --bisect"
35 ;
36
37 static int dense = 1;
38 static int unpacked = 0;
39 static int bisect_list = 0;
40 static int tag_objects = 0;
41 static int tree_objects = 0;
42 static int blob_objects = 0;
43 static int verbose_header = 0;
44 static int show_parents = 0;
45 static int hdr_termination = 0;
46 static const char *commit_prefix = "";
47 static unsigned long max_age = -1;
48 static unsigned long min_age = -1;
49 static int max_count = -1;
50 static enum cmit_fmt commit_format = CMIT_FMT_RAW;
51 static int merge_order = 0;
52 static int show_breaks = 0;
53 static int stop_traversal = 0;
54 static int topo_order = 0;
55 static int no_merges = 0;
56 static const char **paths = NULL;
57
58 static void show_commit(struct commit *commit)
59 {
60         commit->object.flags |= SHOWN;
61         if (show_breaks) {
62                 commit_prefix = "| ";
63                 if (commit->object.flags & DISCONTINUITY) {
64                         commit_prefix = "^ ";     
65                 } else if (commit->object.flags & BOUNDARY) {
66                         commit_prefix = "= ";
67                 } 
68         }                       
69         printf("%s%s", commit_prefix, sha1_to_hex(commit->object.sha1));
70         if (show_parents) {
71                 struct commit_list *parents = commit->parents;
72                 while (parents) {
73                         printf(" %s", sha1_to_hex(parents->item->object.sha1));
74                         parents = parents->next;
75                 }
76         }
77         if (commit_format == CMIT_FMT_ONELINE)
78                 putchar(' ');
79         else
80                 putchar('\n');
81
82         if (verbose_header) {
83                 static char pretty_header[16384];
84                 pretty_print_commit(commit_format, commit->buffer, ~0, pretty_header, sizeof(pretty_header));
85                 printf("%s%c", pretty_header, hdr_termination);
86         }
87         fflush(stdout);
88 }
89
90 static int rewrite_one(struct commit **pp)
91 {
92         for (;;) {
93                 struct commit *p = *pp;
94                 if (p->object.flags & (TREECHANGE | UNINTERESTING))
95                         return 0;
96                 if (!p->parents)
97                         return -1;
98                 *pp = p->parents->item;
99         }
100 }
101
102 static void rewrite_parents(struct commit *commit)
103 {
104         struct commit_list **pp = &commit->parents;
105         while (*pp) {
106                 struct commit_list *parent = *pp;
107                 if (rewrite_one(&parent->item) < 0) {
108                         *pp = parent->next;
109                         continue;
110                 }
111                 pp = &parent->next;
112         }
113 }
114
115 static int filter_commit(struct commit * commit)
116 {
117         if (stop_traversal && (commit->object.flags & BOUNDARY))
118                 return STOP;
119         if (commit->object.flags & (UNINTERESTING|SHOWN))
120                 return CONTINUE;
121         if (min_age != -1 && (commit->date > min_age))
122                 return CONTINUE;
123         if (max_age != -1 && (commit->date < max_age)) {
124                 stop_traversal=1;
125                 return CONTINUE;
126         }
127         if (no_merges && (commit->parents && commit->parents->next))
128                 return CONTINUE;
129         if (paths && dense) {
130                 if (!(commit->object.flags & TREECHANGE))
131                         return CONTINUE;
132                 rewrite_parents(commit);
133         }
134         return DO;
135 }
136
137 static int process_commit(struct commit * commit)
138 {
139         int action=filter_commit(commit);
140
141         if (action == STOP) {
142                 return STOP;
143         }
144
145         if (action == CONTINUE) {
146                 return CONTINUE;
147         }
148
149         if (max_count != -1 && !max_count--)
150                 return STOP;
151
152         show_commit(commit);
153
154         return CONTINUE;
155 }
156
157 static struct object_list **add_object(struct object *obj, struct object_list **p, const char *name)
158 {
159         struct object_list *entry = xmalloc(sizeof(*entry));
160         entry->item = obj;
161         entry->next = *p;
162         entry->name = name;
163         *p = entry;
164         return &entry->next;
165 }
166
167 static struct object_list **process_blob(struct blob *blob, struct object_list **p, const char *name)
168 {
169         struct object *obj = &blob->object;
170
171         if (!blob_objects)
172                 return p;
173         if (obj->flags & (UNINTERESTING | SEEN))
174                 return p;
175         obj->flags |= SEEN;
176         return add_object(obj, p, name);
177 }
178
179 static struct object_list **process_tree(struct tree *tree, struct object_list **p, const char *name)
180 {
181         struct object *obj = &tree->object;
182         struct tree_entry_list *entry;
183
184         if (!tree_objects)
185                 return p;
186         if (obj->flags & (UNINTERESTING | SEEN))
187                 return p;
188         if (parse_tree(tree) < 0)
189                 die("bad tree object %s", sha1_to_hex(obj->sha1));
190         obj->flags |= SEEN;
191         p = add_object(obj, p, name);
192         entry = tree->entries;
193         tree->entries = NULL;
194         while (entry) {
195                 struct tree_entry_list *next = entry->next;
196                 if (entry->directory)
197                         p = process_tree(entry->item.tree, p, entry->name);
198                 else
199                         p = process_blob(entry->item.blob, p, entry->name);
200                 free(entry);
201                 entry = next;
202         }
203         return p;
204 }
205
206 static struct object_list *pending_objects = NULL;
207
208 static void show_commit_list(struct commit_list *list)
209 {
210         struct object_list *objects = NULL, **p = &objects, *pending;
211         while (list) {
212                 struct commit *commit = pop_most_recent_commit(&list, SEEN);
213
214                 p = process_tree(commit->tree, p, "");
215                 if (process_commit(commit) == STOP)
216                         break;
217         }
218         for (pending = pending_objects; pending; pending = pending->next) {
219                 struct object *obj = pending->item;
220                 const char *name = pending->name;
221                 if (obj->flags & (UNINTERESTING | SEEN))
222                         continue;
223                 if (obj->type == tag_type) {
224                         obj->flags |= SEEN;
225                         p = add_object(obj, p, name);
226                         continue;
227                 }
228                 if (obj->type == tree_type) {
229                         p = process_tree((struct tree *)obj, p, name);
230                         continue;
231                 }
232                 if (obj->type == blob_type) {
233                         p = process_blob((struct blob *)obj, p, name);
234                         continue;
235                 }
236                 die("unknown pending object %s (%s)", sha1_to_hex(obj->sha1), name);
237         }
238         while (objects) {
239                 /* An object with name "foo\n0000000000000000000000000000000000000000"
240                  * can be used confuse downstream git-pack-objects very badly.
241                  */
242                 const char *ep = strchr(objects->name, '\n');
243                 if (ep) {
244                         printf("%s %.*s\n", sha1_to_hex(objects->item->sha1),
245                                (int) (ep - objects->name),
246                                objects->name);
247                 }
248                 else
249                         printf("%s %s\n", sha1_to_hex(objects->item->sha1), objects->name);
250                 objects = objects->next;
251         }
252 }
253
254 static void mark_blob_uninteresting(struct blob *blob)
255 {
256         if (!blob_objects)
257                 return;
258         if (blob->object.flags & UNINTERESTING)
259                 return;
260         blob->object.flags |= UNINTERESTING;
261 }
262
263 static void mark_tree_uninteresting(struct tree *tree)
264 {
265         struct object *obj = &tree->object;
266         struct tree_entry_list *entry;
267
268         if (!tree_objects)
269                 return;
270         if (obj->flags & UNINTERESTING)
271                 return;
272         obj->flags |= UNINTERESTING;
273         if (!has_sha1_file(obj->sha1))
274                 return;
275         if (parse_tree(tree) < 0)
276                 die("bad tree %s", sha1_to_hex(obj->sha1));
277         entry = tree->entries;
278         tree->entries = NULL;
279         while (entry) {
280                 struct tree_entry_list *next = entry->next;
281                 if (entry->directory)
282                         mark_tree_uninteresting(entry->item.tree);
283                 else
284                         mark_blob_uninteresting(entry->item.blob);
285                 free(entry);
286                 entry = next;
287         }
288 }
289
290 static void mark_parents_uninteresting(struct commit *commit)
291 {
292         struct commit_list *parents = commit->parents;
293
294         while (parents) {
295                 struct commit *commit = parents->item;
296                 commit->object.flags |= UNINTERESTING;
297
298                 /*
299                  * Normally we haven't parsed the parent
300                  * yet, so we won't have a parent of a parent
301                  * here. However, it may turn out that we've
302                  * reached this commit some other way (where it
303                  * wasn't uninteresting), in which case we need
304                  * to mark its parents recursively too..
305                  */
306                 if (commit->parents)
307                         mark_parents_uninteresting(commit);
308
309                 /*
310                  * A missing commit is ok iff its parent is marked 
311                  * uninteresting.
312                  *
313                  * We just mark such a thing parsed, so that when
314                  * it is popped next time around, we won't be trying
315                  * to parse it and get an error.
316                  */
317                 if (!has_sha1_file(commit->object.sha1))
318                         commit->object.parsed = 1;
319                 parents = parents->next;
320         }
321 }
322
323 static int everybody_uninteresting(struct commit_list *orig)
324 {
325         struct commit_list *list = orig;
326         while (list) {
327                 struct commit *commit = list->item;
328                 list = list->next;
329                 if (commit->object.flags & UNINTERESTING)
330                         continue;
331                 return 0;
332         }
333         return 1;
334 }
335
336 /*
337  * This is a truly stupid algorithm, but it's only
338  * used for bisection, and we just don't care enough.
339  *
340  * We care just barely enough to avoid recursing for
341  * non-merge entries.
342  */
343 static int count_distance(struct commit_list *entry)
344 {
345         int nr = 0;
346
347         while (entry) {
348                 struct commit *commit = entry->item;
349                 struct commit_list *p;
350
351                 if (commit->object.flags & (UNINTERESTING | COUNTED))
352                         break;
353                 nr++;
354                 commit->object.flags |= COUNTED;
355                 p = commit->parents;
356                 entry = p;
357                 if (p) {
358                         p = p->next;
359                         while (p) {
360                                 nr += count_distance(p);
361                                 p = p->next;
362                         }
363                 }
364         }
365         return nr;
366 }
367
368 static void clear_distance(struct commit_list *list)
369 {
370         while (list) {
371                 struct commit *commit = list->item;
372                 commit->object.flags &= ~COUNTED;
373                 list = list->next;
374         }
375 }
376
377 static struct commit_list *find_bisection(struct commit_list *list)
378 {
379         int nr, closest;
380         struct commit_list *p, *best;
381
382         nr = 0;
383         p = list;
384         while (p) {
385                 nr++;
386                 p = p->next;
387         }
388         closest = 0;
389         best = list;
390
391         p = list;
392         while (p) {
393                 int distance = count_distance(p);
394                 clear_distance(list);
395                 if (nr - distance < distance)
396                         distance = nr - distance;
397                 if (distance > closest) {
398                         best = p;
399                         closest = distance;
400                 }
401                 p = p->next;
402         }
403         if (best)
404                 best->next = NULL;
405         return best;
406 }
407
408 static void mark_edges_uninteresting(struct commit_list *list)
409 {
410         for ( ; list; list = list->next) {
411                 struct commit_list *parents = list->item->parents;
412
413                 for ( ; parents; parents = parents->next) {
414                         struct commit *commit = parents->item;
415                         if (commit->object.flags & UNINTERESTING)
416                                 mark_tree_uninteresting(commit->tree);
417                 }
418         }
419 }
420
421 static int is_different = 0;
422
423 static void file_add_remove(struct diff_options *options,
424                     int addremove, unsigned mode,
425                     const unsigned char *sha1,
426                     const char *base, const char *path)
427 {
428         is_different = 1;
429 }
430
431 static void file_change(struct diff_options *options,
432                  unsigned old_mode, unsigned new_mode,
433                  const unsigned char *old_sha1,
434                  const unsigned char *new_sha1,
435                  const char *base, const char *path)
436 {
437         is_different = 1;
438 }
439
440 static struct diff_options diff_opt = {
441         .recursive = 1,
442         .add_remove = file_add_remove,
443         .change = file_change,
444 };
445
446 static int same_tree(struct tree *t1, struct tree *t2)
447 {
448         is_different = 0;
449         if (diff_tree_sha1(t1->object.sha1, t2->object.sha1, "", &diff_opt) < 0)
450                 return 0;
451         return !is_different;
452 }
453
454 static int same_tree_as_empty(struct tree *t1)
455 {
456         int retval;
457         void *tree;
458         struct tree_desc empty, real;
459
460         if (!t1)
461                 return 0;
462
463         tree = read_object_with_reference(t1->object.sha1, "tree", &real.size, NULL);
464         if (!tree)
465                 return 0;
466         real.buf = tree;
467
468         empty.buf = "";
469         empty.size = 0;
470
471         is_different = 0;
472         retval = diff_tree(&empty, &real, "", &diff_opt);
473         free(tree);
474
475         return retval >= 0 && !is_different;
476 }
477
478 static struct commit *try_to_simplify_merge(struct commit *commit, struct commit_list *parent)
479 {
480         if (!commit->tree)
481                 return NULL;
482
483         while (parent) {
484                 struct commit *p = parent->item;
485                 parent = parent->next;
486                 parse_commit(p);
487                 if (!p->tree)
488                         continue;
489                 if (same_tree(commit->tree, p->tree))
490                         return p;
491         }
492         return NULL;
493 }
494
495 static void add_parents_to_list(struct commit *commit, struct commit_list **list)
496 {
497         struct commit_list *parent = commit->parents;
498
499         /*
500          * If the commit is uninteresting, don't try to
501          * prune parents - we want the maximal uninteresting
502          * set.
503          *
504          * Normally we haven't parsed the parent
505          * yet, so we won't have a parent of a parent
506          * here. However, it may turn out that we've
507          * reached this commit some other way (where it
508          * wasn't uninteresting), in which case we need
509          * to mark its parents recursively too..
510          */
511         if (commit->object.flags & UNINTERESTING) {
512                 while (parent) {
513                         struct commit *p = parent->item;
514                         parent = parent->next;
515                         parse_commit(p);
516                         p->object.flags |= UNINTERESTING;
517                         if (p->parents)
518                                 mark_parents_uninteresting(p);
519                         if (p->object.flags & SEEN)
520                                 continue;
521                         p->object.flags |= SEEN;
522                         insert_by_date(p, list);
523                 }
524                 return;
525         }
526
527         /*
528          * Ok, the commit wasn't uninteresting. If it
529          * is a merge, try to find the parent that has
530          * no differences in the path set if one exists.
531          */
532         if (paths && parent && parent->next) {
533                 struct commit *preferred;
534
535                 preferred = try_to_simplify_merge(commit, parent);
536                 if (preferred) {
537                         parent->item = preferred;
538                         parent->next = NULL;
539                 }
540         }
541
542         while (parent) {
543                 struct commit *p = parent->item;
544
545                 parent = parent->next;
546
547                 parse_commit(p);
548                 if (p->object.flags & SEEN)
549                         continue;
550                 p->object.flags |= SEEN;
551                 insert_by_date(p, list);
552         }
553 }
554
555 static void compress_list(struct commit_list *list)
556 {
557         while (list) {
558                 struct commit *commit = list->item;
559                 struct commit_list *parent = commit->parents;
560                 list = list->next;
561
562                 if (!parent) {
563                         if (!same_tree_as_empty(commit->tree))
564                                 commit->object.flags |= TREECHANGE;
565                         continue;
566                 }
567
568                 /*
569                  * Exactly one parent? Check if it leaves the tree
570                  * unchanged
571                  */
572                 if (!parent->next) {
573                         struct tree *t1 = commit->tree;
574                         struct tree *t2 = parent->item->tree;
575                         if (!t1 || !t2 || same_tree(t1, t2))
576                                 continue;
577                 }
578                 commit->object.flags |= TREECHANGE;
579         }
580 }
581
582 static struct commit_list *limit_list(struct commit_list *list)
583 {
584         struct commit_list *newlist = NULL;
585         struct commit_list **p = &newlist;
586         while (list) {
587                 struct commit_list *entry = list;
588                 struct commit *commit = list->item;
589                 struct object *obj = &commit->object;
590
591                 list = list->next;
592                 free(entry);
593
594                 if (max_age != -1 && (commit->date < max_age))
595                         obj->flags |= UNINTERESTING;
596                 if (unpacked && has_sha1_pack(obj->sha1))
597                         obj->flags |= UNINTERESTING;
598                 add_parents_to_list(commit, &list);
599                 if (obj->flags & UNINTERESTING) {
600                         mark_parents_uninteresting(commit);
601                         if (everybody_uninteresting(list))
602                                 break;
603                         continue;
604                 }
605                 if (min_age != -1 && (commit->date > min_age))
606                         continue;
607                 p = &commit_list_insert(commit, p)->next;
608         }
609         if (tree_objects)
610                 mark_edges_uninteresting(newlist);
611         if (paths && dense)
612                 compress_list(newlist);
613         if (bisect_list)
614                 newlist = find_bisection(newlist);
615         return newlist;
616 }
617
618 static void add_pending_object(struct object *obj, const char *name)
619 {
620         add_object(obj, &pending_objects, name);
621 }
622
623 static struct commit *get_commit_reference(const char *name, const unsigned char *sha1, unsigned int flags)
624 {
625         struct object *object;
626
627         object = parse_object(sha1);
628         if (!object)
629                 die("bad object %s", name);
630
631         /*
632          * Tag object? Look what it points to..
633          */
634         while (object->type == tag_type) {
635                 struct tag *tag = (struct tag *) object;
636                 object->flags |= flags;
637                 if (tag_objects && !(object->flags & UNINTERESTING))
638                         add_pending_object(object, tag->tag);
639                 object = parse_object(tag->tagged->sha1);
640                 if (!object)
641                         die("bad object %s", sha1_to_hex(tag->tagged->sha1));
642         }
643
644         /*
645          * Commit object? Just return it, we'll do all the complex
646          * reachability crud.
647          */
648         if (object->type == commit_type) {
649                 struct commit *commit = (struct commit *)object;
650                 object->flags |= flags;
651                 if (parse_commit(commit) < 0)
652                         die("unable to parse commit %s", name);
653                 if (flags & UNINTERESTING)
654                         mark_parents_uninteresting(commit);
655                 return commit;
656         }
657
658         /*
659          * Tree object? Either mark it uniniteresting, or add it
660          * to the list of objects to look at later..
661          */
662         if (object->type == tree_type) {
663                 struct tree *tree = (struct tree *)object;
664                 if (!tree_objects)
665                         return NULL;
666                 if (flags & UNINTERESTING) {
667                         mark_tree_uninteresting(tree);
668                         return NULL;
669                 }
670                 add_pending_object(object, "");
671                 return NULL;
672         }
673
674         /*
675          * Blob object? You know the drill by now..
676          */
677         if (object->type == blob_type) {
678                 struct blob *blob = (struct blob *)object;
679                 if (!blob_objects)
680                         return NULL;
681                 if (flags & UNINTERESTING) {
682                         mark_blob_uninteresting(blob);
683                         return NULL;
684                 }
685                 add_pending_object(object, "");
686                 return NULL;
687         }
688         die("%s is unknown object", name);
689 }
690
691 static void handle_one_commit(struct commit *com, struct commit_list **lst)
692 {
693         if (!com || com->object.flags & SEEN)
694                 return;
695         com->object.flags |= SEEN;
696         commit_list_insert(com, lst);
697 }
698
699 /* for_each_ref() callback does not allow user data -- Yuck. */
700 static struct commit_list **global_lst;
701
702 static int include_one_commit(const char *path, const unsigned char *sha1)
703 {
704         struct commit *com = get_commit_reference(path, sha1, 0);
705         handle_one_commit(com, global_lst);
706         return 0;
707 }
708
709 static void handle_all(struct commit_list **lst)
710 {
711         global_lst = lst;
712         for_each_ref(include_one_commit);
713         global_lst = NULL;
714 }
715
716 int main(int argc, const char **argv)
717 {
718         const char *prefix = setup_git_directory();
719         struct commit_list *list = NULL;
720         int i, limited = 0;
721
722         for (i = 1 ; i < argc; i++) {
723                 int flags;
724                 const char *arg = argv[i];
725                 char *dotdot;
726                 struct commit *commit;
727                 unsigned char sha1[20];
728
729                 if (!strncmp(arg, "--max-count=", 12)) {
730                         max_count = atoi(arg + 12);
731                         continue;
732                 }
733                 if (!strncmp(arg, "--max-age=", 10)) {
734                         max_age = atoi(arg + 10);
735                         limited = 1;
736                         continue;
737                 }
738                 if (!strncmp(arg, "--min-age=", 10)) {
739                         min_age = atoi(arg + 10);
740                         limited = 1;
741                         continue;
742                 }
743                 if (!strcmp(arg, "--header")) {
744                         verbose_header = 1;
745                         continue;
746                 }
747                 if (!strncmp(arg, "--pretty", 8)) {
748                         commit_format = get_commit_format(arg+8);
749                         verbose_header = 1;
750                         hdr_termination = '\n';
751                         if (commit_format == CMIT_FMT_ONELINE)
752                                 commit_prefix = "";
753                         else
754                                 commit_prefix = "commit ";
755                         continue;
756                 }
757                 if (!strncmp(arg, "--no-merges", 11)) {
758                         no_merges = 1;
759                         continue;
760                 }
761                 if (!strcmp(arg, "--parents")) {
762                         show_parents = 1;
763                         continue;
764                 }
765                 if (!strcmp(arg, "--bisect")) {
766                         bisect_list = 1;
767                         continue;
768                 }
769                 if (!strcmp(arg, "--all")) {
770                         handle_all(&list);
771                         continue;
772                 }
773                 if (!strcmp(arg, "--objects")) {
774                         tag_objects = 1;
775                         tree_objects = 1;
776                         blob_objects = 1;
777                         continue;
778                 }
779                 if (!strcmp(arg, "--unpacked")) {
780                         unpacked = 1;
781                         limited = 1;
782                         continue;
783                 }
784                 if (!strcmp(arg, "--merge-order")) {
785                         merge_order = 1;
786                         continue;
787                 }
788                 if (!strcmp(arg, "--show-breaks")) {
789                         show_breaks = 1;
790                         continue;
791                 }
792                 if (!strcmp(arg, "--topo-order")) {
793                         topo_order = 1;
794                         limited = 1;
795                         continue;
796                 }
797                 if (!strcmp(arg, "--dense")) {
798                         dense = 1;
799                         continue;
800                 }
801                 if (!strcmp(arg, "--sparse")) {
802                         dense = 0;
803                         continue;
804                 }
805                 if (!strcmp(arg, "--")) {
806                         i++;
807                         break;
808                 }
809
810                 if (show_breaks && !merge_order)
811                         usage(rev_list_usage);
812
813                 flags = 0;
814                 dotdot = strstr(arg, "..");
815                 if (dotdot) {
816                         unsigned char from_sha1[20];
817                         char *next = dotdot + 2;
818                         *dotdot = 0;
819                         if (!*next)
820                                 next = "HEAD";
821                         if (!get_sha1(arg, from_sha1) && !get_sha1(next, sha1)) {
822                                 struct commit *exclude;
823                                 struct commit *include;
824                                 
825                                 exclude = get_commit_reference(arg, from_sha1, UNINTERESTING);
826                                 include = get_commit_reference(next, sha1, 0);
827                                 if (!exclude || !include)
828                                         die("Invalid revision range %s..%s", arg, next);
829                                 limited = 1;
830                                 handle_one_commit(exclude, &list);
831                                 handle_one_commit(include, &list);
832                                 continue;
833                         }
834                         *dotdot = '.';
835                 }
836                 if (*arg == '^') {
837                         flags = UNINTERESTING;
838                         arg++;
839                         limited = 1;
840                 }
841                 if (get_sha1(arg, sha1) < 0)
842                         break;
843                 commit = get_commit_reference(arg, sha1, flags);
844                 handle_one_commit(commit, &list);
845         }
846
847         if (!list)
848                 usage(rev_list_usage);
849
850         paths = get_pathspec(prefix, argv + i);
851         if (paths) {
852                 limited = 1;
853                 diff_tree_setup_paths(paths);
854         }
855
856         save_commit_buffer = verbose_header;
857         track_object_refs = 0;
858
859         if (!merge_order) {             
860                 sort_by_date(&list);
861                 if (list && !limited && max_count == 1 &&
862                     !tag_objects && !tree_objects && !blob_objects) {
863                         show_commit(list->item);
864                         return 0;
865                 }
866                 if (limited)
867                         list = limit_list(list);
868                 if (topo_order)
869                         sort_in_topological_order(&list);
870                 show_commit_list(list);
871         } else {
872 #ifndef NO_OPENSSL
873                 if (sort_list_in_merge_order(list, &process_commit)) {
874                         die("merge order sort failed\n");
875                 }
876 #else
877                 die("merge order sort unsupported, OpenSSL not linked");
878 #endif
879         }
880
881         return 0;
882 }