CHEF-2879: Add chef_gem resource for installing gems to current gem e…

…nvironment

chef/lib/chef/resource/chef_gem.rb

@@ -0,0 +1,43 @@
+#
+# Author:: Bryan McLellan <btm@loftninjas.org>
+# Copyright:: Copyright (c) 2012 Opscode, Inc.
+# License:: Apache License, Version 2.0
+#
+# 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.
+#
+
+require 'chef/resource/package'
+require 'chef/resource/gem_package'
+
+class Chef
+  class Resource
+    class ChefGem < Chef::Resource::Package::GemPackage
+
+      def initialize(name, run_context=nil)
+        super
+        @resource_name = :chef_gem
+        @provider = Chef::Provider::Package::Rubygems
+      end
+
+      # The chef_gem resources is for installing gems to the current gem environment only for use by Chef cookbooks.
+      def gem_binary(arg=nil)
+        if arg
+          raise ArgumentError, "The chef_gem resource is restricted to the current gem environment, use gem_package to install to other environments."
+        end
+
+        nil
+      end
+
+    end
+  end
+end

chef/lib/chef/resources.rb

@@ -20,6 +20,7 @@
 require 'chef/resource/bash'
 require 'chef/resource/breakpoint'
 require 'chef/resource/cookbook_file'
+require 'chef/resource/chef_gem'
 require 'chef/resource/cron'
 require 'chef/resource/csh'
 require 'chef/resource/deploy'

chef/spec/unit/resource/chef_gem_spec.rb

@@ -0,0 +1,49 @@
+#
+# Author:: Adam Jacob (<adam@opscode.com>)
+# Author:: Bryan McLellan <btm@loftninjas.org>
+# Copyright:: Copyright (c) 2008, 2012 Opscode, Inc.
+# License:: Apache License, Version 2.0
+#
+# 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.
+#
+
+require File.expand_path(File.join(File.dirname(__FILE__), "..", "..", "spec_helper"))
+
+describe Chef::Resource::ChefGem, "initialize" do
+
+  before(:each) do
+    @resource = Chef::Resource::ChefGem.new("foo")
+  end
+
+  it "should return a Chef::Resource::ChefGem" do
+    @resource.should be_a_kind_of(Chef::Resource::ChefGem)
+  end
+
+  it "should set the resource_name to :chef_gem" do
+    @resource.resource_name.should eql(:chef_gem)
+  end
+
+  it "should set the provider to Chef::Provider::Package::Rubygems" do
+    @resource.provider.should eql(Chef::Provider::Package::Rubygems)
+  end
+end
+
+describe Chef::Resource::ChefGem, "gem_binary" do
+  before(:each) do
+    @resource = Chef::Resource::ChefGem.new("foo")
+  end
+
+  it "should raise an exception when gem_binary is set" do
+    lambda { @resource.gem_binary("/lol/cats/gem") }.should raise_error(ArgumentError)
+  end
+end