checkout.c

   1 #include "cache.h"
   2 #include "remote.h"
   3 #include "refspec.h"
   4 #include "checkout.h"
   5
   6 struct tracking_name_data {
   7         /* const */ char *src_ref;
   8         char *dst_ref;
   9         struct object_id *dst_oid;
  10         int unique;
  11 };
  12
  13 static int check_tracking_name(struct remote *remote, void *cb_data)
  14 {
  15         struct tracking_name_data *cb = cb_data;
  16         struct refspec_item query;
  17         memset(&query, 0, sizeof(struct refspec_item));
  18         query.src = cb->src_ref;
  19         if (remote_find_tracking(remote, &query) ||
  20             get_oid(query.dst, cb->dst_oid)) {
  21                 free(query.dst);
  22                 return 0;
  23         }
  24         if (cb->dst_ref) {
  25                 free(query.dst);
  26                 cb->unique = 0;
  27                 return 0;
  28         }
  29         cb->dst_ref = query.dst;
  30         return 0;
  31 }
  32
  33 const char *unique_tracking_name(const char *name, struct object_id *oid)
  34 {
  35         struct tracking_name_data cb_data = { NULL, NULL, NULL, 1 };
  36         cb_data.src_ref = xstrfmt("refs/heads/%s", name);
  37         cb_data.dst_oid = oid;
  38         for_each_remote(check_tracking_name, &cb_data);
  39         free(cb_data.src_ref);
  40         if (cb_data.unique)
  41                 return cb_data.dst_ref;
  42         free(cb_data.dst_ref);
  43         return NULL;
  44 }