actually loading and running some libgit2 code

.gitignore

@@ -0,0 +1,3 @@
+*.beam
+*.so
+*.o

Makefile

@@ -4,6 +4,8 @@ INCLUDES = -I$(OTPROOT)/erts/emulator/beam/
 # OS X flags.
 GCCFLAGS = -O3 -fPIC -bundle -flat_namespace -undefined suppress -fno-common -Wall -m32
 
+LIBS = -lz -lgit2
+
 # Linux Flags
 #GCCFLAGS = -O3 -fPIC -shared -fno-common -Wall
 

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);

test

@@ -3,18 +3,13 @@
 %%! debug verbose -noshell
 
 main([Object]) ->
-    try
-        geef:start(),
-        Test = geef:object_exists(4),
-        io:format("factorial ~s:~w~n", [Object, Test])
-    catch
-        _:_ ->
-            usage()
-    end;
+    geef:start(),
+    Test = geef:object_exists(4),
+    io:format("exists ~s:~w~n", [Object, Test]);
 main(_) ->
     usage().
         
 usage() ->
-    io:format("usage: factorial integer\n"),
+    io:format("usage: ./test SHA\n"),
     halt(1).