geforce-now-linux

#!/bin/bash
#
# A launcher for NVIDIA GeForce NOW on Linux.
#
# Copyright (c) 2020-2021 Toni Corvera <outlyer@gmail.com>
#
# MIT License at the bottom of this file

# References:
#  1. https://www.gamingonlinux.com/2020/08/nvidia-geforce-now-adds-chromebook-support-so-you-can-run-it-on-linux-too
#  2. https://www.gamingonlinux.com/2020/09/nvidia-geforce-now-on-linux-can-run-without-user-agent-spoofing-in-a-browser
#  3. https://peter.sh/experiments/chromium-command-line-switches/
#  4. https://www.whatismybrowser.com/guides/the-latest-user-agent/chrome-os
#  5. https://developers.whatismybrowser.com/useragents/explore/operating_system_name/chrome-os/

# Configuration, tweak as you see fit. 1=On, anything else means Off
# NOTE: There's actually no need to edit the script directly, can invoke setting the
#  variable first, e.g.:
# > START_MAXIMIZED=0 START_IN_INCOGNITO=1 geforce-now-linux 
# > CHROMIUM_VARIANTS='chromium microsoft-edge' geforce-now-linux
START_MAXIMIZED=${START_MAXIMIZED:-1}         # Starts maximized but not completely full screen
START_IN_INCOGNITO=${START_IN_INCOGNITO:-0}   # This doesn't seem to have any effect on my system
START_FULLSCREEN=${START_FULLSCREEN:-1}       # Starts full screen, toggle with F11
OVERRIDE_USER_AGENT=${OVERRIDE_USER_AGENT:-0} # Pretend to be running under ChromeOS

# The first available known chromium browser will be used
# Reorder if you have a different preference, or set the CHROMIUM_VARIANTS environment variable
# as noted above
# Opera doesn't appear to take the --app option so I'm not including it
# NOTE: In my tests Chromium gives an error when trying to start a game
declare -ra DEFAULT_CHROMIUM_VARIANTS=( \
	google-chrome \
	microsoft-edge \
	vivaldi \
	microsoft-edge-dev \
	chromium \
)
CHROMIUM_VARIANTS=${CHROMIUM_VARIANTS:-${DEFAULT_CHROMIUM_VARIANTS[@]}}

# TODO: Match the user agent to the installed version. Probably overkill
#       The corresponding chrome version is easy (--version) but the CrOS
#       version probably not so much without a table
USER_AGENT="Mozilla/5.0 (X11; CrOS x86_64 13020.87.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/83.0.4103.119 Safari/537.36"

# --- You probably shouldn't change anything below here ---

# Pretty-print 1 (on) and 0 (off) values
on_off() {
	local val='off'
	[[ $1 -eq 0 ]] || val='on'
	echo $val
}

ua=$USER_AGENT
if [[ $OVERRIDE_USER_AGENT -ne 1 ]]; then
	ua="(Browser's user agent)"
fi
cat >&2 <<EOF
Configuration variables:
 START_MAXIMIZED:     $(on_off $START_MAXIMIZED)
 START_IN_INCOGNITO:  $(on_off $START_IN_INCOGNITO)
 START_FULLSCREEN:    $(on_off $START_FULLSCREEN)
 OVERRIDE_USER_AGENT: $(on_off $OVERRIDE_USER_AGENT)
 USER_AGENT:          $ua
 CHROMIUM_VARIANTS:   ${CHROMIUM_VARIANTS[@]}
EOF
unset ua

# Pick the first variant available
for variant in ${CHROMIUM_VARIANTS[@]}; do
	if type -p $variant ; then
		CHROMIUM=$variant
		break
	fi >/dev/null
done

if [[ -z "$CHROMIUM" ]]; then
	echo "No known variant of Chromium detected, aborting..." >&2
	exit 1
fi
echo Selected chromium variant: $CHROMIUM >&2

OPTIONS=
if [[ $START_IN_INCOGNITO = 1 ]]; then
	OPTIONS+=( "--start-in-incognito" )
fi
if [[ $START_MAXIMIZED = 1 ]]; then
	OPTIONS+=( "--start-maximized" )
fi
if [[ $START_FULLSCREEN = 1 ]]; then
	OPTIONS+=( "--start-fullscreen" )
fi

if [[ $OVERRIDE_USER_AGENT -eq 1 ]]; then
	OPTIONS+=( "--user-agent=$USER_AGENT" )
fi

echo Running with options: "${OPTIONS[@]}" >&2

# NOTE: Can test effective User Agent e.g. directly via Google:
# https://google.com/search?q=what+is+my+user+agent
exec $CHROMIUM "${OPTIONS[@]}" \
	--app=https://play.geforcenow.com

# MIT LICENSE TEXT:

# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in all
# copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.