feat(framework): "Null" support added

Resolves #47

README.md

@@ -24,6 +24,7 @@ then [add recipes to the corresponding OpsWorks actions](#recipes).
 * SCM
   * git
 * Framework
+  * Null (no framework)
   * Ruby on Rails
 * App server
   * Null (no appserver)
@@ -141,7 +142,7 @@ Pre-optimalization for specific frameworks (like migrations, cache etc.).
 Currently only `Rails` is supported.
 
 * `app['framework']['adapter']`
-  * **Supported values:** `rails`
+  * **Supported values:** `null`, `rails`
   * **Default:** `rails`
   * Ruby framework used in project.
 * `app['framework']['migrate']`

libraries/drivers_framework_null.rb

@@ -0,0 +1,10 @@
+# frozen_string_literal: true
+module Drivers
+  module Framework
+    class Null < Drivers::Framework::Base
+      adapter :null
+      allowed_engines :null
+      output filter: []
+    end
+  end
+end

recipes/deploy.rb

@@ -26,7 +26,7 @@
     user node['deployer']['user'] || 'root'
     group www_group
     rollback_on_error true
-    environment application['environment'].merge(framework.out[:deploy_environment])
+    environment application['environment'].merge(framework.out[:deploy_environment] || {})
 
     keep_releases deploy[:keep_releases]
     create_dirs_before_symlink(
@@ -50,7 +50,7 @@
       end
     end
 
-    migration_command(framework.out[:migration_command])
+    migration_command(framework.out[:migration_command]) if framework.out[:migration_command]
     migrate framework.out[:migrate]
     before_migrate do
       perform_bundle_install(shared_path, bundle_env)

spec/unit/libraries/drivers_framework_null_spec.rb

@@ -0,0 +1,16 @@
+# frozen_string_literal: true
+require 'spec_helper'
+
+describe Drivers::Framework::Null do
+  it 'receives and exposes app and node' do
+    driver = described_class.new(aws_opsworks_app, node)
+
+    expect(driver.app).to eq aws_opsworks_app
+    expect(driver.node).to eq node
+    expect(driver.options).to eq({})
+  end
+
+  it 'returns proper out data' do
+    expect(described_class.new(aws_opsworks_app, node).out).to eq({})
+  end
+end