gistfile1.txt

#!/usr/bin/env ruby

# get memory in kilobytes and store it

output = %x(free)
min_ram = 8388608

# grab the total column and store it
free_ram = output.split(" ")[7].to_i

# define error message if less than 8 GB of ram
MEM_SIZE = "This system has less than 8 GB of total memory. Please have at least 8 GB of total ram free before running the installer."

# define our error message method to write to stderr and exit

def error_exit(message, code)
  $stderr.puts message
  exit code
end

# provide our error to the user if ram is less than 8 GB
error_exit(MEM_SIZE, 1) if output < min_ram