Modify task DSL API to take env on initialization

lib/producer/core/task.rb

@@ -3,8 +3,8 @@ module Producer
     class Task
       class << self
         def evaluate(name, env, *args, &block)
-          dsl = DSL.new(&block)
+          dsl = DSL.new(env, &block)
-          dsl.evaluate(env, *args)
+          dsl.evaluate(*args)
           Task.new(name, dsl.actions, dsl.condition)
         end
       end

lib/producer/core/task/dsl.rb

@@ -15,16 +15,16 @@ module Producer
 
         define_action :file_write,  Actions::FileWriter
 
-        attr_accessor :actions
+        attr_accessor :env, :actions
 
-        def initialize(&block)
+        def initialize(env, &block)
+          @env        = env
           @block      = block
           @actions    = []
           @condition  = true
         end
 
-        def evaluate(env, *args)
+        def evaluate(*args)
-          @env = env
           instance_exec *args, &@block
         end
 

spec/producer/core/task/dsl_spec.rb

@@ -4,7 +4,7 @@ module Producer::Core
   describe Task::DSL do
     let(:block)   { proc { } }
     let(:env)     { double 'env' }
-    subject(:dsl) { Task::DSL.new(&block) }
+    subject(:dsl) { Task::DSL.new(env, &block) }
 
     %w[echo sh file_write].each do |action|
       it "has `#{action}' action defined" do
@@ -20,6 +20,10 @@ module Producer::Core
     end
 
     describe '#initialize' do
+      it 'assigns the given env' do
+        expect(dsl.env).to be env
+      end
+
       it 'assigns no action' do
         expect(dsl.actions).to be_empty
       end
@@ -49,7 +53,7 @@ module Producer::Core
       let(:block) { proc { throw :task_code } }
 
       it 'evaluates its code' do
-        expect { dsl.evaluate env }
+        expect { dsl.evaluate }
           .to throw_symbol :task_code
       end
 
@@ -57,7 +61,7 @@ module Producer::Core
         let(:block) { proc { |e| throw e } }
 
         it 'passes arguments as block parameters' do
-          expect { dsl.evaluate env, :some_argument }
+          expect { dsl.evaluate :some_argument }
             .to throw_symbol :some_argument
         end
       end
@@ -68,7 +72,7 @@ module Producer::Core
 
         before do
           Task::DSL.define_action(:some_action, some_action_class)
-          dsl.evaluate env
+          dsl.evaluate
         end
 
         it 'registers the action' do
@@ -82,7 +86,7 @@ module Producer::Core
     end
 
     context 'DSL specific methods' do
-      subject(:dsl) { Task::DSL.new(&block).evaluate(env) }
+      subject(:dsl) { Task::DSL.new(env, &block).evaluate }
 
       describe '#condition' do
         context 'when a block is given' do
@@ -90,7 +94,7 @@ module Producer::Core
 
           it 'builds a new evaluated condition' do
             expect(Condition)
-              .to receive(:evaluate).with(env) do |&b|
+              .to receive :evaluate do |&b|
                 expect(b.call).to eq :some_value
               end
             dsl

spec/producer/core/task_spec.rb

@@ -12,19 +12,19 @@ module Producer::Core
       let(:args)  { [:some, :arguments] }
       let(:block) { proc { :some_task_code } }
 
-      it 'builds a new DSL sandbox with given code' do
+      it 'builds a new DSL sandbox with given env and code' do
         dsl = double('dsl').as_null_object
-        expect(Task::DSL).to receive(:new).with(no_args) do |&b|
+        expect(Task::DSL).to receive(:new).with(env) do |&b|
           expect(b).to be block
           dsl
         end
         Task.evaluate(name, env, *args, &block)
       end
 
-      it 'evaluates the DSL sandbox code with given environment' do
+      it 'evaluates the DSL sandbox code with given arguments' do
         dsl = double('dsl').as_null_object
         allow(Task::DSL).to receive(:new) { dsl }
-        expect(dsl).to receive(:evaluate).with(env, *args)
+        expect(dsl).to receive(:evaluate).with(*args)
         Task.evaluate(name, env, *args, &block)
       end