Check for ENV["TMUX"] when using teamocil

README.mkd

@@ -7,6 +7,7 @@ Teamocil is a tool used to automatically create windows and splits in `tmux` wit
     $ gem install teamocil
     $ mkdir ~/.teamocil
     $ touch ~/.teamocil/sample.yml
+    $ tmux
     $ teamocil sample
 
 # Layout example

bin/teamocil

@@ -1,6 +1,10 @@
 #!/usr/bin/env ruby
 
-require "teamocil"
+require File.dirname(__FILE__)+"/../lib/teamocil"
 
+if ENV["TMUX"] == nil
+  puts "You must be in a tmux session to use teamocil"
+else
   layout = Teamocil::Layout.new(ARGV[0], File.join("#{ENV["HOME"]}/.teamocil", "#{ARGV[0]}.yml"))
   layout.to_tmux
+end