fix: use the preset node_env prior to setting one.

Author: KonnorRogers

lib/snowpacker/runner.rb

@@ -0,0 +1,53 @@
+# frozen_string_literal: true
+
+require 'socket'
+require 'snowpacker/env'
+
+module Snowpacker
+  module Rails
+    class Runner
+      attr_reader :config_file
+
+      def initialize
+        @config_file = Snowpacker.config.config_file
+        @env = Env.set_env_variables
+
+        detect_port!
+
+      rescue Errno::ENOENT, NoMethodError
+        $stdout.puts "Snowpacker configuration not found in #{Snowpacker.config_location}"
+        $stdout.puts "Please run bundle exec rails generate snowpacker to install Snowpacker"
+        exit!
+      end
+
+      # Build for production
+      def build
+        snowpacker_command(env: :production, cmd: :build)
+      end
+
+      # Serve for development
+      def dev
+        snowpacker_command(env: :development, cmd: :dev)
+      end
+
+      private
+
+      def snowpacker_command(env: '', cmd: '')
+        env = ENV["NODE_ENV"] || env
+        command = "NODE_ENV=#{env} yarn run snowpack #{cmd} --config #{@config_file}"
+        exec(command)
+      end
+
+      def detect_port!
+        hostname = Snowpacker.config.hostname
+        port = Snowpacker.config.port
+        server = TCPServer.new(hostname, port)
+        server.close
+      rescue Errno::EADDRINUSE
+        $stdout.puts "Another program is running on port #{port}.\n
+                      Set a new port in #{Snowpacker.config_path} for devOptions: { port: \"#{port}\" }"
+        exit!
+      end
+    end
+  end
+end