lib/lapidarius/cutter.rb in lapidarius-1.1.0 vs lib/lapidarius/cutter.rb in lapidarius-1.1.1

@@ -3,18 +3,21 @@
 
 module Lapidarius
   class Cutter
     DEVELOPMENT = "development"
 
+    class GemNotCreatedError < StandardError; end
+
     def initialize(gem:, cmd_klass: Command)
       @gem = gem
       @cmd = cmd_klass.new
     end
 
     def call(src = cmd, gem = nil)
       tokens = tokenize(src)
       token = tokens.shift
       gem ||= Gem.factory(token)
+      fail GemNotCreatedError, "unable to create a gem from #{token}" unless gem
       tokens.each do |t|
         dep = Gem.factory(t)
         next unless dep
         gem << dep
         call(cmd(dep.name), dep)