compiler.rb in sewing_kit-0.29.1

- old
+ new

@@ -2,11 +2,25 @@
 require 'sewing_kit/webpack/webpack'
 
 module SewingKit
   module Webpack
     class Compiler
+      class NodeNotInstalled < StandardError
+        def initialize
+          super(
+            "nodejs is not installed.  " \
+            "Try creating a `.buildpack` file in the root of the project with following content:
+
+            https://github.com/heroku/heroku-buildpack-nodejs.git
+            https://github.com/heroku/heroku-buildpack-ruby.git
+            "
+          )
+        end
+      end
+
       def compile
+        raise NodeNotInstalled unless node_installed?
         raise NodeSewingKitNotRunnable, node_env unless File.exist?('node_modules/.bin/sewing-kit')
 
         result = Kernel.system(
           { 'NODE_ENV' => node_env },
           *command,
@@ -27,15 +41,19 @@
       def command
         [
           'node_modules/.bin/sewing-kit',
           'build',
           '--mode',
-          node_env
+          node_env,
         ].reject(&:empty?)
       end
 
       def node_env
         ENV['NODE_ENV'] || Rails.env.to_s
+      end
+
+      def node_installed?
+        Kernel.system('node --version')
       end
     end
   end
 end