don't keep installing gabbler from bench

fix ab detection

script/bench.rb

@@ -29,7 +29,8 @@ def run(command)
   require 'facter'
 rescue LoadError
   run "gem install facter"
-  require 'facter'
+  put "please rerun script"
+  exit
 end
 
 @timings = {}
@@ -62,7 +63,8 @@ def prereqs
 
 puts "Ensuring config is setup"
 
-unless %x{which ab > /dev/null 2>&1}
+%x{which ab > /dev/null 2>&1}
+unless $? == 0
   abort "Apache Bench is not installed. Try: apt-get install apache2-utils or brew install ab"
 end
 

script/profile_db_generator.rb

@@ -28,6 +28,12 @@ def unbundled_require(gem)
   end
 end
 
+# by default, Discourse has a "system" account
+if User.count > 1
+  puts "Only run this script against an empty DB"
+  exit
+end
+
 require 'optparse'
 begin
   unbundled_require 'gabbler'
@@ -37,8 +43,6 @@ def unbundled_require(gem)
   unbundled_require 'gabbler'
 end
 
-user_id = nil
-
 def sentence
   @gabbler ||= Gabbler.new.tap do |gabbler|
     story = File.read(File.dirname(__FILE__) + "/alice.txt")
@@ -72,12 +76,6 @@ def create_admin(seq)
   exit
 end
 
-# by default, Discourse has a "system" account
-if User.count > 1
-  puts "Only run this script against an empty DB"
-  exit
-end
-
 puts "Creating 100 users"
 users = 100.times.map do |i|
   putc "."