Kitty version checker 🐈‍⬛

kitty-version-check.rb

#!/usr/bin/env ruby

# full path to a custom icns file
CUSTOM_ICNS = false
CUSTOM_ICNS_FILE = ""

require "colorize"
require "optparse"

def options
  return @options unless @options.nil?

  @options = {}
  OptionParser.new do |parser|
    parser.banner = "Usage: kitty-update-check [options]"

    parser.on("-f", "--force", "Force the update install regardless of version mismatch") do |f|
      options[:force] = f
    end
    parser.on("-d", "--dry-run", "Perform a dry run without installing or updating anything") do |d|
      options[:dry_run] = d
    end
    parser.on("-i", "--icns", "Update the app to use the custom icns file (defined in the script)") do |i|
      options[:icns] = i
    end
    parser.on("-h", "--help", "Prints this help") do
      puts parser
      exit
    end
  end.parse!

  @options
end

def dry_run?
  options[:dry_run] == true
end

def forcing?
  options[:force] == true
end

def updating_icns?
  options[:icns] == true
end

# => "0.40.1"
def installed_version
  @installed_version ||= `command kitty --version`.match(%r:(\d+\.\d+\.\d+):)[1]
end

# => "0.41.0"
def current_version
  @constants_py ||= `command curl --silent https://raw.githubusercontent.com/kovidgoyal/kitty/master/kitty/constants.py`
  @constants_py.match(%r:Version\((\d+, \d+, \d+)\)$:)[1].split(',').map(&:to_i).join('.')
end

def perform_install?
  return true if forcing?

  installed_version != current_version
end

def inform_user
  puts "=> New kitty version available! (v#{current_version}) [installed: v#{installed_version}] 🆕".light_blue
  puts "=> Changelog: https://sw.kovidgoyal.net/kitty/changelog/".light_blue
  puts
end

def user_consents?
  print "=> Update? (Y/N) ".blue
  answer = ""
  while answer.length == 0
    answer = gets.chomp
  end

  answer[0].upcase == "Y"
end

def install_app
  puts "==> Downloading and installing v#{current_version}...".blue

  if dry_run?
    puts "===> Skipping install command [dry run]".cyan
  else
    system "command curl -L https://sw.kovidgoyal.net/kitty/installer.sh | sh /dev/stdin"
  end

  puts "==> Update complete!".blue
end

def custom_icns?
  CUSTOM_ICNS && CUSTOM_ICNS_FILE.length > 0
end

def check_icns_exists!
  return unless custom_icns?

  raise RuntimeError.new("File does not exist: #{CUSTOM_ICNS_FILE}") unless File.exist? CUSTOM_ICNS_FILE
end

# Updates the kitty app's Info.plist to point to a custom file (copied to its app install location)
def update_icns
  check_icns_exists!

  basename = File.basename(CUSTOM_ICNS_FILE)
  plist_path = "/Applications/kitty.app/Contents/Info.plist"
  puts "==> Updating the Info.plist to use your custom icns file [#{basename}]...".blue

  system("cp #{CUSTOM_ICNS_FILE} /Applications/kitty.app/Contents/Resources/#{basename}")
  puts "===> Custom icns file copied to the app's install location".cyan

  system("cp #{plist_path}{,-bak.plist}")
  puts "===> Backed up the app's Info.plist".cyan

  friendly_basename = Regexp.escape(basename)
  if system("sed -i 's/kitty\.icns/#{friendly_basename}/g' #{plist_path}")
    puts "===> Changed the Info.plist to point to your custom icns file".cyan
    puts "==> Update complete!".blue
  else
    puts "==> Error updating the Info.plist with your #{basename} file path".red
  end
end

if perform_install?
  inform_user

  if forcing? || user_consents?
    install_app
  end
elsif updating_icns?
  if !custom_icns?
    puts "=> Custom ICNS not currently setup (see top of file for settings)".red
    exit 1
  end

  update_icns
else
  puts "=> Kitty is up to date! (v#{installed_version}) 👍".blue
end