Run EXE in Proton

withProton.sh

#! /bin/bash

set -e

readonly b="\033[1m" # bold text
readonly i="\033[3m" # italic text
readonly n="\033[0m" # normal text
readonly r="\033[0;31m" # red text
readonly u="\033[4m" # underlined text
readonly PROTON_ROOT="$HOME/.proton"
readonly STEAM_ROOT="$HOME/.steam/root"
if [[ $1 != -* ]] ; then
    readonly GAME_ROOT="$(dirname "$1")"
    readonly RUN_EXE=$1; shift
fi

function errorAndExit(){ # message, error code
	echo -e "$r$1$n" >&2
	exit $2
}

function initializeVars(){
    declare -g PROTON_VER="Proton - Experimental"
    declare -g LIST_PROTON_VERSIONS=False
}
initializeVars

while getopts 'hlp:w:' opt; do case "$opt" in
h)
	initializeVars # reset defaults to clear any argument changes
	columns=$(tput cols)
	echo -e "${b}NAME$n
	withProton.sh - Run EXE in Proton

${b}SYNOPSIS$n
	withProton.sh whatever.exe [options...]

	withProton.sh -l

${b}DESCRIPTION$n
	When you just want to run a random EXE in Proton (and WINE won't work) without having to configure a bunch of options you don't care about in some obscure GUI. Just throw it in and use the defaults.

${b}OPTIONS$n
	$b-h$n
		Print this help and exit.

	$b-l$n
		List all installed Proton versions (available in ~/.steam/root/steamapps/common) and exit.

	$b-p$n ${i}\"ProtonVersion\"$n
		Set the Proton version, default \"$PROTON_VER\"

	$b-w$n ${i}\"WineRoot\"$n
		By default, there will be one Wine root for each Proton version, but you can specify a different one with this option. These are stored in ~/.proton

${b}ENVIRONMENT$n
    Steam must be installed on the local user's home directory at ~/.steam with at least one Proton version.
"|fmt -w $columns
	exit 0
;; l)
    LIST_PROTON_VERSIONS=True
;; p)
    PROTON_VER="$OPTARG"
;; w)
    declare -g WINE_ROOT="$OPTARG"
;; \?)
	errorAndExit "Bad option: $opt" 2
;; esac done

function checkArgs(){
	if [ $LIST_PROTON_VERSIONS = True ] ; then
        ls -Q ~/.steam/root/steamapps/common/ | grep --color=never ^\"Proton[[:print:]+]
        exit 0
	fi
	if [[ ! -f $RUN_EXE ]]; then
		errorAndExit "No file: $RUN_EXE" 2
	fi
    if [ ! -d "$STEAM_ROOT/steamapps/common/$PROTON_VER" ]; then
        errorAndExit "Proton version not available: $PROTON_VER" 2
    fi
}
checkArgs

cd "$GAME_ROOT" || exit
if [[ -z "$WINE_ROOT" ]]; then
    declare -g WINE_ROOT="$PROTON_VER"
fi
mkdir -p "$PROTON_ROOT/$WINE_ROOT"
export STEAM_COMPAT_DATA_PATH="$PROTON_ROOT/$WINE_ROOT"
export STEAM_COMPAT_CLIENT_INSTALL_PATH="$STEAM_ROOT"
"$STEAM_ROOT/steamapps/common/$PROTON_VER/proton" run "$RUN_EXE" >/dev/null 2>&1