Ruby script to list and selectively delete iOS simulators based on runtime

simulator_cleaner.rb

#!/usr/bin/env ruby

require 'JSON'
require 'optparse'

options = {}

OptionParser.new do |parser|
  parser.banner = "Usage: simulator_cleaner.rb [options]"

  parser.on("-h", "--help", "Show this help message") do ||
    puts parser
    exit
  end

  parser.on("-l", "--list-runtimes", "List the installed simulator runtimes") do |v|
    options[:list] = true
  end

  parser.on("-d", "--delete-runtime RUNTIME", "Delete the installed simulator devices matching the provided runtime") do |v|
    options[:delete] = true
    options[:runtime] = v
  end

end.parse!


if options[:list]
  runtimes = JSON.parse `xcrun simctl list -j runtimes`

  puts "Available runtimes:"

  runtimes['runtimes'].each do |runtime|
    puts "#{runtime['name']}"
  end

  exit
end

if options[:delete]
  devices = JSON.parse `xcrun simctl list -j devices`

  puts "Deleting simulators with runtime #{options[:runtime]}:"

  devices['devices'].each do |runtime, runtime_devices|
    if runtime == options[:runtime] then
      runtime_devices.each do |device|
        puts "Deleting simulator #{device['name']} (#{device['udid']})"
        `xcrun simctl delete #{device['udid']}`
      end
    end
  end

  exit
end