git pre-receive hook to catch Ruby debugger statements and reject push

christ.txt

             .======.
             | INRI |
             |      |
             |      |
    .========'      '========.
    |   _      xxxx      _   |
    |  /_;-.__ / _\  _.-;_\  |
    |     `-._`'`_/'`.-'     |
    '========.`\   /`========'
             | |  / |
             |/-.(  |
             |\_._\ |
             | \ \`;|
             |  > |/|
             | / // |
             | |//  |
             | \(\  |
             |  ``  |
             |      |
             |      |
             |      |
             |      |
 \\||| _  _\\| \//  |//_   _ \// _
^ `^`^ ^`` `^ ^` ``^^`  `^^` `^ `^

pre-receive

#!/usr/bin/env ruby

ascii_art_path = ('/usr/share/ascii-art/christ.txt')

def msg(message)
  normal_message = %{
    #############################################################
      #{message}
    #############################################################
  }
  better_message = File.read(ascii_art_path)
  normal_message = better_message
  normal_message << message + "\n\n"
  normal_message
end


rev_old, rev_new, ref = STDIN.read.split(" ")

incoming = `git diff -U0 -p #{rev_old} #{rev_new}`
lines = incoming.split("\n")
regex = Regexp.new('^\+{1}.*debugger.*')
debugger_exists = lines.detect { |str| str.match(regex) }


if debugger_exists
  #puts msg("You've left a debugger in.  Please remove and re-push.")
  puts msg("I didn't die for you to leave debuggers in your code.")
  exit 1
end

snoop.txt

            _.--""-.                      
        .--"        `.                    
       /              \                   
      :            .   ;                  
      ;            :   |                  
     ::    .       ::  :                  
     ::. .:'       ':.  ;                 
     ;::::' __.._   ::. :                 
    /  __.g$$$$$$""gp.._'-._              
  .'.g$$$$$$$$$P   T$-.:""-/              
  '-.T$$P`T$$P'     ");|.-'               
      "T         .-  ,-'                  
       l _,     /    ;\.-"\               
       d$$bp.       /  ;   `-.            
       T"--"T     .'   : \_, :            
        Y""-  _.-"  '  ;  )' ;"-._        
       .:b..gdP    /  / .'  /     "-.     
      / 'T$$P"   .' .'    .'         `.   
   _.-`.  \  \    .'   .-"             \  
 .'     "-.)_ `.-"  .-"                 ; 
/            "-._.-"                    :