simple script to unpack a go distribution & link it into /usr/local

upgrade_go.rb

#!/usr/bin/env ruby

require 'pathname'


# Upgrade go on linux from binary distribution file
# 1. Will create /usr/local/go-<major>.<minor>.<patch>
# 2. Will create a symbolic link from /usr/local/go -> this version
def run
  file = ARGV[0]

  if file.nil? || !Pathname.new(file).exist?
    puts 'filename required'
    exit(1)
  end

  parts = file.match(/go(?<major>\d+)\.(?<minor>\d+)(\.(?<patch>\d+))?.linux/)

  destination = "go-#{parts['major']}.#{parts['minor']}"
  destination = "#{destination}.#{parts['patch']}" unless parts['patch'].nil?

  if Pathname.new("/usr/local/#{destination}").exist?
    puts 'destination already exists'
    exit(1)
  end

  exec_command "sudo mkdir /usr/local/#{destination}"
  exec_command "sudo tar -zxvf #{file} -C /usr/local/#{destination} --strip-components 1"
  exec_command "cd /usr/local && sudo ln -nsf #{destination} go"
end

def exec_command(cmd)
  puts cmd
  `#{cmd}`
end

run
puts 'done'