gistfile1.txt

#!/usr/bin/env ruby

require "fileutils"
require "optparse"

GDM_CONFIG_FILE = "/etc/gdm/custom.conf"

def nvidia_to_intel
  # Removing bumblebee and friends
  system "pacman --noconfirm -S bbswitch-dkms bumblebee primus"

  # Forcing GDM to use X11 instead of wayland
  FileUtils.mv(GDM_CONFIG_FILE, "#{GDM_CONFIG_FILE}.bkp")
  gdm_config = File.open("#{GDM_CONFIG_FILE}.bkp").read
  gdm_config.gsub!(/WaylandEnable=false/, "#WaylandEnable=false")
  gdm_file_config = File.open(GDM_CONFIG_FILE, 'w')
  gdm_file_config.write(gdm_config)
  FileUtils.remove_file("#{GDM_CONFIG_FILE}.bkp")

  # Disabling the NVIDIA HDMI fix systemd unit
  system "systemctl disable nvidia-hdmi-audio-fix.service"
end

def intel_to_nvidia
  # Removing bumblebee and friends
  system "pacman --noconfirm -R bbswitch-dkms bumblebee primus"

  # Installing the NVIDIA driver
  system "pacman --noconfirm -S nvidia-dkms"

  # Forcing GDM to use X11 instead of wayland
  FileUtils.mv(GDM_CONFIG_FILE, "#{GDM_CONFIG_FILE}.bkp")
  gdm_config = File.open("#{GDM_CONFIG_FILE}.bkp").read
  gdm_config.gsub!(/#WaylandEnable=false/, "WaylandEnable=false")
  gdm_file_config = File.open(GDM_CONFIG_FILE, 'w')
  gdm_file_config.write(gdm_config)
  FileUtils.remove_file("#{GDM_CONFIG_FILE}.bkp")


  # Disabling the NVIDIA HDMI fix systemd unit
  system "systemctl enable nvidia-hdmi-audio-fix.service"
end

options = {}
OptionParser.new do |opts|
  opts.banner =<<~BANNER
    NAME
    switch-gpu Switches between Intel + Bumblebee and pure NVIDIA propertary driver GPU setup

    SYNOPSIS

    switch-gpu -i Switches to Intel + Bumblebee
    switch-gpu -n Switches to only NVIDIA
    switch-gpu [--help]

    DESCRIPTION
    Switches between Intel + Bumblebee and pure NVIDIA propertary driver GPU setup
  BANNER

  token_msg = "Github acesss token."
  opts.on("-i", "--intel", "Switches to Intel + Bumblebee") do |i|
    options[:intel] = i
  end

  opts.on("-n", "--nvidia", "Switches to NVIDIA") do |n|
    options[:nvidia] = n
  end
end.parse!

nvidia_to_intel if options[:intel]
intel_to_nvidia if options[:nvidia]

puts "switch-gpu: restart your system to make changes take effect"