Bash script to run app thru steam or system proton

game-example.desktop

[Desktop Entry]
Comment[ru_RU]=
Comment=
Exec='~/Games/fisher-online/drive_c/GameCenter/Fisher online/run.sh'
GenericName[ru_RU]=Симулятор рыбалки онлайн
GenericName=Симулятор рыбалки онлайн
Icon=~/Games/fisher-online/drive_c/GameCenter/Fisher online/icon.png
MimeType=
Name[ru_RU]=Fisher Online
Name=Fisher Online
Path=~/Games/fisher-online/drive_c/GameCenter/Fisher online/
StartupNotify=true
Terminal=false
TerminalOptions=
Type=Application
X-KDE-SubstituteUID=false
X-KDE-Username=

proton.sh

#!/bin/bash
# Usage examples:
# ./proton.sh relative/path/to/game.exe steamappid-if-needed
# ./proton.sh relative/path/to/game.exe
# PROTON_DIR=/usr/share/steam/compatibilitytools.d/proton-ge-custom ./proton.sh relative/path/to/game.exe steamappid-if-needed
# PROTON_DIR=/usr/share/steam/compatibilitytools.d/proton-ge-custom ./proton.sh relative/path/to/game.exe
if [ -z "${PROTON_DIR}" ]; then
    printf "Please select proton path:\n"
    PROTON_PATHS=(/usr/share/steam/compatibilitytools.d/* $HOME/.steam/steam/steamapps/common/Proton*)
    select d in "${PROTON_PATHS[@]}"; do test -n "$d" && break; echo ">>> Invalid Selection"; done
    PROTON_DIR=$d
fi
PWD_WITH_SLASH=$PWD"/"
RUNNING=${1/$PWD_WITH_SLASH/""}
STEAM_APP_ID="$2"

if [ ! -f "$PROTON_DIR/proton" ] ; then
    echo "Proton in path $PROTON_DIR not found!";
    exit
fi

if [ ! -f "$RUNNING" ] ; then
    echo "$RUNNING does not exist!";
    exit
fi

# Steam / Client path
export STEAM_COMPAT_CLIENT_INSTALL_PATH="$HOME/.steam/steam"
export STEAM_COMPAT_DATA_PATH="$HOME/.steam/steam/steamapps/compatdata/$STEAM_APP_ID"

PROTON_VERSION=`cat "$PROTON_DIR"/version`

printf "Proton (\033[32m$PROTON_VERSION\033[0m) script found at\n  \033[32m$PROTON_DIR/proton\033[0m\n\n"
printf "Now running\n  \033[32m$PWD/$RUNNING\033[0m\n"
printf "Steam app id\n  \033[32m$STEAM_APP_ID\033[0m\n"

export MOUNT_PATH="/mnt/c"

pfx='${PROTON_DIR}/dist'
export PATH="$pfx/bin/:$PATH"
export WINEDLLPATH="$pfx/lib64/wine:$pfx/lib/wine"
export LD_LIBRARY_PATH="$pfx/lib64/:$pfx/lib/:/usr/lib/:/usr/lib64/"
export GST_PLUGIN_SYSTEM_PATH_1_0="/usr/lib/gstreamer-1.0/:/usr/lib64/gstreamer-1.0/"


PROTON_USE_WINED3D11=1 \
#PROTON_NO_D3D11=0 \
PROTON_NO_ESYNC=1 \
"${PROTON_DIR}"/proton run $RUNNING \
&> /dev/null

exit 0

run-example.sh

#!/bin/bash
gamemoderun \
mangohud \
PROTON_DIR=$HOME/.steam/steam/steamapps/common/Proton\ 8.0 \
~/proton.sh theFisher.exe 1493710