A test to prevent regression of the E2BIG problem

lib/paperclip/helpers.rb

@@ -24,7 +24,7 @@ module Paperclip
     #
     def run(cmd, arguments = "", local_options = {})
       command_path = options[:command_path]
-      Cocaine::CommandLine.path = ( Cocaine::CommandLine.path ? [Cocaine::CommandLine.path].flatten | [command_path] : command_path )
+      Cocaine::CommandLine.path = [Cocaine::CommandLine.path, command_path].flatten.compact.uniq
       local_options = local_options.merge(:logger => logger) if logging? && (options[:log_command] || local_options[:log_command])
       Cocaine::CommandLine.new(cmd, arguments, local_options).run
     end

test/paperclip_test.rb

@@ -33,6 +33,14 @@ class PaperclipTest < Test::Unit::TestCase
     end
   end
 
+  should 'not raise errors when doing a lot of running' do
+    Paperclip.options[:command_path] = ["/usr/local/bin"] * 1024
+    Cocaine::CommandLine.path = "/something/else"
+    100.times do |x|
+      Paperclip.run("echo", x.to_s)
+    end
+  end
+
   context "Calling Paperclip.log without options[:logger] set" do
     setup do
       Paperclip.logger = nil