builtin/skew.c

   1 #include "cache.h"
   2 #include "commit.h"
   3 #include "diff.h"
   4 #include "revision.h"
   5
   6 unsigned long worst_skew = 0;
   7
   8 static void check_skew_recurse(struct commit *c, unsigned long when)
   9 {
  10         struct commit_list *p;
  11
  12         if (c->object.flags & SEEN)
  13                 return;
  14         c->object.flags |= SEEN;
  15
  16         if (parse_commit(c) < 0)
  17                 return;
  18
  19         if (c->date > when) {
  20                 unsigned long skew = c->date - when;
  21                 if (skew > worst_skew)
  22                         worst_skew = skew;
  23         }
  24
  25         for (p = c->parents; p; p = p->next)
  26                 check_skew_recurse(p->item, c->date < when ? c->date : when);
  27 }
  28
  29 static void check_skew(struct commit *c)
  30 {
  31         check_skew_recurse(c, time(NULL));
  32 }
  33
  34 int cmd_skew(int argc, const char **argv, const char *prefix) {
  35         struct rev_info revs;
  36         int i;
  37
  38         git_config(git_default_config, NULL);
  39         init_revisions(&revs, prefix);
  40         argc = setup_revisions(argc, argv, &revs, NULL);
  41
  42         for (i = 0; i < revs.pending.nr; i++) {
  43                 struct object *o = revs.pending.objects[i].item;
  44                 if (o->type == OBJ_COMMIT)
  45                         check_skew((struct commit *)o);
  46         }
  47
  48         printf("%lu\n", worst_skew);
  49         return 0;
  50 }