This cask installs PixelSnap 2 from a disk image in the current directory

pixelsnap2.rb

require 'uri'

cask "pixelsnap2" do
  version "2.0"
  sha256 "04e2d1892593d904f3d528c70b5fc4ec773c957b2d3bdd0e8a8876045ff458c8"
  url "file://#{URI::encode(File.expand_path(File.dirname(ARGV[1] ? ARGV[1] : '')))}/PixelSnap-2-2.0.dmg"
  name "PixelSnap 2"
  homepage "https://getpixelsnap.com/"

  app "PixelSnap 2.app"

  uninstall :login_item => "PixelSnap 2"

  zap :trash => ["~/Library/Application Support/PixelSnap",
                 "~/Library/Caches/pl.maketheweb.pixelsnap2",
                 "~/Library/Preferences/pl.maketheweb.pixelsnap2.plist"]
end