make penchant gemfile pass through to bundler when possible, for drop-in replacement

bin/penchant

@@ -26,8 +26,17 @@ class PenchantCLI < Thor
 
   desc "gemfile ENV", "Switch the gemfile environment, or rebuild the current environment if not given"
   def gemfile(env = get_current_env)
+    if env
       puts "[penchant] Rebunding for #{env} environment..."
-    Penchant::Gemfile.do_full_env_switch!(env)
+      !Penchant::Gemfile.do_full_env_switch!(env)
+    end
+
+    gemfile = Penchant::Gemfile.new
+    if !gemfile.has_gemfile?
+      puts "No Gemfile or Gemfile.erb, exiting."
+      exit 1
+    end
+    system %{bundle}
   end
 
   desc "gemfile-env", "Get the gemfile environment"

lib/penchant/gemfile.rb

@@ -8,12 +8,10 @@ module Penchant
       def do_full_env_switch!(env)
         gemfile = Penchant::Gemfile.new
         if !gemfile.has_gemfile_erb?
-          puts "Not using Gemfile.erb, exiting."
           return false
         end
 
         gemfile.switch_to!(env)
-        system %{bundle}
       end
     end
 

script/gemfile

@@ -4,6 +4,7 @@ require 'rubygems'
 require 'penchant'
 
 if Penchant::Gemfile.do_full_env_switch!(ARGV[0])
+  system %{bundle}
   puts "Gemfile switched to #{ARGV[0]}"
 else
   exit 0