readlog.rb for android adb logcat

readlog.rb

#!/usr/bin/ruby

RED = "\033[0;31m"
RESET = "\033[0m"
YELLOW = "\033[0;33m"
C = "\033[0;35m"

trap("INT") { puts; exit! 127 }

def stamp line
  puts "#{Time.now.strftime '%H:%M:%S'}: #{line}" if line
end

IO.popen "adb logcat#{" -b radio" if ARGV.length > 2}" do |pipe|
  stamp case s = pipe.gets.strip
  when /^E\/AndroidRuntime/
    if STDOUT.tty?
      RED+s+RESET
    else
      s
    end
  when /option/i
    YELLOW+s+RESET
  else
    s
  end until pipe.eof?
end