[graphics][gaming] Manually download Steam bootstrap files

[LukeShortCloud]

These are required before the Linux steam package will work. These are automatically downloaded when the Steam client is opened. The license for Steam does NOT allow bundling the bootstrap files in an OS (or other software bundle) but they can be part of a first-time setup / downloaded once Internet connection is made.

STEAM_DIST_NAME = 'steam_1.0.0.75.tar.gz'

steam_root = File.join(ENV['HOME'], '.steam')
FileUtils.mkdir_p(steam_root)

Dir.chdir(steam_root) do

  set_up_file('steam/ubuntu12_32') do

    set_up_file(STEAM_DIST_NAME) do
      puts 'Downloading Steam...'
      system("fetch http://repo.steampowered.com/steam/pool/steam/s/steam/#{STEAM_DIST_NAME} || fetch http://repo.steampowered.com/steam/archive/stable/#{STEAM_DIST_NAME}")
    end

    verify_checksum(STEAM_DIST_NAME)

    FileUtils.mkdir_p('steam')

    puts 'Extracting bootstrap...'
    system("tar -xf #{STEAM_DIST_NAME} --strip-components 1 --to-stdout steam-launcher/bootstraplinux_ubuntu12_32.tar.xz | tar -C steam -xf -")
  end

  for symlink, target in {
    'root'    => 'steam',
    'bin32'   => 'steam/ubuntu12_32',
    'bin64'   => 'steam/ubuntu12_64',
    'sdk32'   => 'steam/linux32',
    'sdk64'   => 'steam/linux64',
  }
    if not File.symlink?(symlink)
      puts "Creating symlink #{symlink} -> #{target}"
      FileUtils.ln_s(target, symlink)
    end
  end

https://github.com/shkhln/linuxulator-steam-utils/blob/master/bin/steam-install

[LukeShortCloud]

This is also useful for gamescope-sesssion-steam where it will not work without the bootstrap files.