missing-revs.c

   1 #include "cache.h"
   2 #include "rev-cache.h"
   3
   4 static const char missing_revs_usage[] =
   5 "git-missing-revs <rev-cache-file> <want-sha1>...";
   6
   7 #define REV_WANT 01
   8 #define REV_HAVE 02
   9
  10 static void process(struct rev_cache *head_list)
  11 {
  12         while (head_list) {
  13                 struct rev_cache *rc = head_list;
  14                 struct rev_list_elem *e;
  15                 head_list = rc->head_list;
  16                 rc->head_list = NULL;
  17                 if (has_sha1_file(rc->sha1)) {
  18                         rc->work |= REV_HAVE;
  19                         continue;
  20                 }
  21                 if (rc->work & (REV_WANT|REV_HAVE))
  22                         continue;
  23                 rc->work |= REV_WANT;
  24                 printf("%s\n", sha1_to_hex(rc->sha1));
  25                 for (e = rc->parents; e; e = e->next) {
  26                         if (e->ri->work & REV_HAVE)
  27                                 continue;
  28                         e->ri->head_list = head_list;
  29                         head_list = e->ri;
  30                 }
  31         }
  32 }
  33
  34 int main(int ac, char **av)
  35 {
  36         const char *rev_cache_file;
  37         struct rev_cache *head_list = NULL;
  38         int i;
  39
  40         if (ac < 3)
  41                 usage(missing_revs_usage);
  42         rev_cache_file = av[1];
  43         read_rev_cache(rev_cache_file, NULL, 0);
  44         for (i = 2; i < ac; i++) {
  45                 unsigned char sha1[20];
  46                 int pos;
  47                 struct rev_cache *rc;
  48                 if (get_sha1_hex(av[i], sha1))
  49                         die("%s: not an SHA1", av[i]);
  50                 if ((pos = find_rev_cache(sha1)) < 0) {
  51                         /* We could be asked for tags, which would not
  52                          * appear in the rev-cache.
  53                          */
  54                         puts(av[i]);
  55                         continue;
  56                 }
  57                 rc = rev_cache[pos];
  58                 rc->head_list = head_list;
  59                 head_list = rc;
  60         }
  61         process(head_list);
  62         return 0;
  63 }