feat: Added support for gems like figaro and dotenv

When configured, it is possible now to include different format of environmenta variables
configurations (aside from directly passing them to appservers/workers). Currently
`config/application.yml` (for figaro) and `.env` (for dotenv) are supported.

Resolves #28

.overcommit.yml

@@ -56,3 +56,7 @@ CommitMsg:
     on_warn: fail
   CapitalizedSubject:
     enabled: false
+  TextWidth:
+    enabled: true
+    max_subject_width: 100
+    max_body_width: 100

README.md

@@ -157,10 +157,20 @@ Configuration parameters for the ruby application server. Currently only
     in front. `null` means no appserver enabled.
 * [`app['appserver']['accept_filter']`](https://unicorn.bogomips.org/Unicorn/Configurator.html#method-i-listen)
   * **Default:** `httpready`
+* `app['appserver']['application_yml']`
+  * **Supported values:** `true`, `false`
+  * **Default:** `false`
+  * Creates a `config/application.yml` file with all pre-configured environment
+    variables. Useful for gems like [figaro](https://github.com/laserlemon/figaro)
 * [`app['appserver']['backlog']`](https://unicorn.bogomips.org/Unicorn/Configurator.html#method-i-listen)
   * **Default:** `1024`
 * [`app['appserver']['delay']`](https://unicorn.bogomips.org/Unicorn/Configurator.html#method-i-listen)
   * **Default:** `0.5`
+* `app['appserver']['dot_env']`
+  * **Supported values:** `true`, `false`
+  * **Default:** `false`
+  * Creates a `.env` file with all pre-configured environment
+    variables. Useful for gems like [dotenv](https://github.com/bkeepers/dotenv)
 * [`app['appserver']['preload_app']`](https://unicorn.bogomips.org/Unicorn/Configurator.html#method-i-preload_app)
   * **Supported values:** `true`, `false`
   * **Default:** `true`

attributes/default.rb

@@ -31,6 +31,8 @@
 
 default['defaults']['appserver']['worker_processes'] = 4
 default['defaults']['appserver']['adapter'] = 'unicorn'
+default['defaults']['appserver']['application_yml'] = false
+default['defaults']['appserver']['dot_env'] = false
 
 ## unicorn
 

libraries/drivers_appserver_base.rb

@@ -5,6 +5,11 @@ class Base < Drivers::Base
       include Drivers::Dsl::Notifies
       include Drivers::Dsl::Output
 
+      def configure(context)
+        application_yml(context)
+        dot_env(context)
+      end
+
       def out
         handle_output(raw_out)
       end
@@ -17,6 +22,36 @@ def raw_out
 
       def validate_app_engine
       end
+
+      private
+
+      def application_yml(context)
+        return unless raw_out[:application_yml]
+        env_config(context, source_file: 'config/application.yml', destination_file: 'config/application.yml')
+      end
+
+      def dot_env(context)
+        return unless raw_out[:dot_env]
+        env_config(context, source_file: 'dot_env', destination_file: '.env')
+      end
+
+      # rubocop:disable Metrics/MethodLength
+      def env_config(context, options = { source_file: nil, destination_file: nil })
+        deploy_to = deploy_dir(app)
+        environment = app['environment']
+
+        context.template File.join(deploy_to, 'shared', options[:source_file]) do
+          owner node['deployer']['user']
+          group www_group
+          source "#{File.basename(options[:source_file])}.erb"
+          variables environment: environment
+        end
+
+        context.link File.join(deploy_to, 'current', options[:destination_file]) do
+          to File.join(deploy_to, 'shared', options[:source_file])
+        end
+      end
+      # rubocop:enable Metrics/MethodLength
     end
   end
 end

libraries/drivers_appserver_unicorn.rb

@@ -9,6 +9,7 @@ class Unicorn < Drivers::Appserver::Base
       ]
 
       def configure(context)
+        super
         add_unicorn_config(context)
         add_unicorn_service_script(context)
         add_unicorn_service_context(context)

spec/fixtures/node.rb

@@ -71,7 +71,9 @@ def node(override = {})
       },
       appserver: {
         adapter: 'unicorn',
-        worker_processes: 8
+        worker_processes: 8,
+        application_yml: true,
+        dot_env: true
       },
       webserver: {
         adapter: 'nginx',

spec/unit/recipes/configure_spec.rb

@@ -11,6 +11,7 @@
   let(:chef_run) do
     ChefSpec::SoloRunner.new(platform: 'ubuntu', version: '14.04') do |solo_node|
       solo_node.set['deploy'] = node['deploy']
+      solo_node.set['defaults'] = { 'appserver' => node['defaults']['appserver'] }
       solo_node.set['nginx'] = node['nginx']
     end.converge(described_recipe)
   end
@@ -60,13 +61,35 @@
         )
     end
 
+    it 'creates proper application.yml file' do
+      expect(chef_run)
+        .to render_file("/srv/www/#{aws_opsworks_app['shortname']}/shared/config/application.yml")
+        .with_content('ENV_VAR1: "test"')
+      expect(chef_run)
+        .to render_file("/srv/www/#{aws_opsworks_app['shortname']}/shared/config/application.yml")
+        .with_content('ENV_VAR2: "some data"')
+      expect(chef_run)
+        .to create_link("/srv/www/#{aws_opsworks_app['shortname']}/current/config/application.yml")
+    end
+
+    it 'creates proper dot_env file' do
+      expect(chef_run)
+        .to render_file("/srv/www/#{aws_opsworks_app['shortname']}/shared/dot_env")
+        .with_content('ENV_VAR1="test"')
+      expect(chef_run)
+        .to render_file("/srv/www/#{aws_opsworks_app['shortname']}/shared/dot_env")
+        .with_content('ENV_VAR2="some data"')
+      expect(chef_run)
+        .to create_link("/srv/www/#{aws_opsworks_app['shortname']}/current/.env")
+    end
+
     it 'creates proper unicorn.conf file' do
       expect(chef_run)
         .to render_file("/srv/www/#{aws_opsworks_app['shortname']}/shared/config/unicorn.conf")
         .with_content('ENV[\'ENV_VAR1\'] = "test"')
       expect(chef_run)
         .to render_file("/srv/www/#{aws_opsworks_app['shortname']}/shared/config/unicorn.conf")
-        .with_content('worker_processes 4')
+        .with_content('worker_processes 8')
       expect(chef_run)
         .to render_file("/srv/www/#{aws_opsworks_app['shortname']}/shared/config/unicorn.conf")
         .with_content(':delay => 3')

templates/default/application.yml.erb

@@ -0,0 +1,4 @@
+---
+<% @environment.each do |key, value| %>
+<%= key.to_s %>: <%= value && value.to_s.inspect %>
+<% end %>

templates/default/dot_env.erb

@@ -0,0 +1,3 @@
+<% @environment.each do |key, value| %>
+<%= key.to_s %>=<%= value && value.to_s.inspect %>
+<% end %>