Implement Task::DSL#evaluate:

So that the env is available from the task DSL.

lib/producer/core/recipe.rb

@@ -16,7 +16,7 @@ module Producer
 
       def evaluate(env)
         dsl = DSL.new(@code).evaluate(env)
-        dsl.tasks.map(&:evaluate)
+        dsl.tasks.map { |e| e.evaluate env }
       end
     end
   end

lib/producer/core/task.rb

@@ -8,8 +8,8 @@ module Producer
         @block  = block
       end
 
-      def evaluate
-        DSL.new &@block
+      def evaluate(env)
+        DSL.new(&@block).evaluate(env)
       end
     end
   end

lib/producer/core/task/dsl.rb

@@ -5,7 +5,11 @@ module Producer
         ConditionNotMetError = Class.new(StandardError)
 
         def initialize(&block)
-          instance_eval &block
+          @block = block
+        end
+
+        def evaluate(env)
+          instance_eval &@block
         rescue ConditionNotMetError
         end
 

spec/producer/core/recipe_spec.rb

@@ -52,7 +52,7 @@ module Producer::Core
         allow(Task).to receive(:new) { task }
         dsl = Recipe::DSL.new { task(:some_task) }
         allow(Recipe::DSL).to receive(:new) { dsl }
-        expect(task).to receive(:evaluate)
+        expect(task).to receive(:evaluate).with(env)
         recipe.evaluate(env)
       end
     end

spec/producer/core/task/dsl_spec.rb

@@ -2,13 +2,15 @@ require 'spec_helper'
 
 module Producer::Core
   describe Task::DSL do
+    let(:env)     { double('env') }
     subject(:dsl) { Task::DSL.new &block }
 
-    describe '#initialize' do
+    describe '#evaluate' do
       let(:block) { Proc.new { raise 'error from task' } }
 
-      it 'evaluates its block' do
-        expect { dsl }.to raise_error(RuntimeError, 'error from task')
+      it 'evaluates its code' do
+        expect { dsl.evaluate(env) }
+          .to raise_error(RuntimeError, 'error from task')
       end
     end
 
@@ -20,7 +22,8 @@ module Producer::Core
         } }
 
         it 'evaluates all the block' do
-          expect { dsl }.to raise_error(RuntimeError, 'error after condition')
+          expect { dsl.evaluate(env) }
+            .to raise_error(RuntimeError, 'error after condition')
         end
       end
 
@@ -31,7 +34,7 @@ module Producer::Core
         } }
 
         it 'stops block evaluation' do
-          expect { dsl }.not_to raise_error
+          expect { dsl.evaluate(env) }.not_to raise_error
         end
       end
     end

spec/producer/core/task_spec.rb

@@ -13,9 +13,18 @@ module Producer::Core
     end
 
     describe '#evaluate' do
+      let(:env) { double('env') }
+
       it 'builds a task DSL sandbox' do
-        expect(Task::DSL).to receive(:new).with(&block)
-        task.evaluate
+        expect(Task::DSL).to receive(:new).with(&block).and_call_original
+        task.evaluate(env)
+      end
+
+      it 'evaluates the task DSL sandbox' do
+        dsl = double('task dsl')
+        allow(Task::DSL).to receive(:new) { dsl }
+        expect(dsl).to receive(:evaluate).with(env)
+        task.evaluate(env)
       end
     end
   end