actually loading and running some libgit2 code

geef.c

@@ -1,4 +1,8 @@
 #include "erl_nif.h"
+#include <stdio.h>
+#include <git/common.h>
+#include <git/oid.h>
+
 
 static int
 load(ErlNifEnv* env, void** priv, ERL_NIF_TERM load_info)
@@ -28,6 +32,12 @@ unload(ErlNifEnv* env, void* priv)
 static ERL_NIF_TERM
 object_exists(ErlNifEnv* env, ERL_NIF_TERM a1)
 {
+  git_oid oid;
+  static char *sha = "ce08fe4884650f067bd5703b6a59a8b3b3c99a09";
+  printf("sha: %s\n", sha);
+  git_oid_mkstr(&oid, sha);
+  //printf("raw: %s", (&oid)->id);
+
     unsigned long val;
     if(!enif_get_ulong(env, a1, &val)) {
         return enif_make_badarg(env);