minor: version checking for cbson

ext/cbson/cbson.c

@@ -36,6 +36,8 @@
 #include "regex.h"
 #endif
 
+#include "version.h"
+
 #include <assert.h>
 #include <math.h>
 #include <unistd.h>
@@ -792,7 +794,7 @@ static VALUE objectid_generate(VALUE self)
 
 
 void Init_cbson() {
-    VALUE mongo, CBson, Digest;
+    VALUE mongo, CBson, Digest, ext_version;
     Time = rb_const_get(rb_cObject, rb_intern("Time"));
 
     mongo = rb_const_get(rb_cObject, rb_intern("Mongo"));
@@ -812,6 +814,8 @@ void Init_cbson() {
     OrderedHash = rb_const_get(rb_cObject, rb_intern("OrderedHash"));
 
     CBson = rb_define_module("CBson");
+    ext_version = rb_str_new2(VERSION);
+    rb_define_const(CBson, "VERSION", ext_version);
     rb_define_module_function(CBson, "serialize", method_serialize, 2);
     rb_define_module_function(CBson, "deserialize", method_deserialize, 1);
 

ext/cbson/version.h

@@ -0,0 +1,17 @@
+/*
+ * Copyright 2009 10gen, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define VERSION "0.18\0"

lib/mongo.rb

@@ -10,8 +10,8 @@ end
 begin
     # Need this for running test with and without c ext in Ruby 1.9.
     raise LoadError if ENV['TEST_MODE'] && !ENV['C_EXT']
-    gem 'mongo_ext', "= #{Mongo::VERSION}"
     require 'mongo_ext/cbson'
+    raise LoadError if CBson::VERSION != Mongo::VERSION
     require 'mongo/util/bson_c'
     BSON            = BSON_C
     BSON_SERIALIZER = CBson

mongo-extensions.gemspec

@@ -1,11 +1,12 @@
 require 'lib/mongo'
-
+VERSION_HEADER = File.open(File.join(File.dirname(__FILE__), 'ext', 'cbson', 'version.h'), "r") 
+VERSION        = VERSION_HEADER.read.scan(/VERSION\s+"(\d+\.\d+)\\/)[0][0]
 Gem::Specification.new do |s|
   s.name = 'mongo_ext'
 
-  s.version = Mongo::VERSION
+  s.version  = VERSION
   s.platform = Gem::Platform::RUBY
-  s.summary = 'C extensions for the MongoDB Ruby driver'
+  s.summary  = 'C extensions for the MongoDB Ruby driver'
   s.description = 'C extensions to accelerate the MongoDB Ruby driver. For more information about Mongo, see http://www.mongodb.org.'
 
   s.require_paths = ['ext']