fix(framework): Fixed envs_in_console for rails

Up to this commit, `envs_in_console` was creating a `config/initializers/000_console.rb` file, which
basically overloaded `Rails.application.load_console` method, with new ENVs. However, this caused
problems, since console gets loaded pretty late in initialization stack. For example, if ENVs were
used in `application/secrets.yml` (which is common practice) they wasn't loaded, since secrets is
populated before loading the console. To avoid that, a new solution was implemented -
`config/application.rb` is updated, with the ENVs (while still maintaining console context). This
ensures, that all the variables are loaded as fast as possible, and visible to as many Rails
components as they need to be.

Signed-off-by: Igor Rzegocki <igor@rzegocki.pl>

README.md

@@ -186,6 +186,9 @@ ActiveRecord::Base.configurations[:production] = database_url || {
   * **Default:** `false`
   * If set to true, `rails console` will be invoked with all application-level
     environment variables set.
+  * **WARNING!** This is highly unstable feature. If you experience any troubles
+    with deployments, and have this feature enabled, consider disabling it as a
+    first step in your debugging process.
 
 ### appserver
 

libraries/drivers_framework_rails.rb

@@ -45,14 +45,16 @@ def database_yml(db)
 
       def setup_rails_console
         return unless out[:envs_in_console]
-        deploy_to = deploy_dir(app)
-        env = environment
+        application_rb_path = File.join(deploy_dir(app), 'current', 'config', 'application.rb')
 
-        context.template File.join(deploy_to, 'current', 'config', 'initializers', '000_console.rb') do
-          owner node['deployer']['user']
-          group www_group
-          source 'rails_console_overload.rb.erb'
-          variables environment: env
+        if File.exist?(application_rb_path)
+          env_code = "if(defined?(Rails::Console))\n  " +
+                     environment.map { |key, value| "ENV['#{key}'] = #{value.inspect}" }.join("\n  ") +
+                     "\nend\n"
+
+          contents = File.read(application_rb_path).sub(/(^(?:module|class).*$)/, "#{env_code}\n\\1")
+
+          File.open(application_rb_path, 'w') { |file| file.write(contents) }
         end
       end