proton-run

proton-run.sh

#!/bin/bash
die() {
    echo "$@"
    exit 1
}

library_paths=( /mdata/games/ /data/games /sdata/games )

case "$1" in
    -l|list)
        for path in "${library_paths[@]}"; do
            ls "$path/steam/steamapps/common" 2>/dev/null | grep Proton
        done
        exit ;;
    -h|--help|help) echo "$0 (list|<version> <appid> <executable>)"; exit ;;
    *) ;;
esac

[ $# -ne 3 ] && die "Expected 3 arguments, got $#"
version="$1"
appid="$2"
executable="$3"

compat=
prefix=
proton=

for path in "${library_paths[@]}"; do
    p="$path/steam/steamapps/compatdata/$appid"
    if [ -d "$p" ]; then
        install="$(realpath "$p/../../../")"
        compat="$p"
        prefix="$compat/pfx"
    fi
    p="$path/steam/steamapps/common/$version/proton"
    if [ -f "$p" ]; then
        proton="$p"
    fi
done

[ -n "$compat" ] || die "Failed to find the compatdata dir"
[ -n "$proton" ] || die "Failed to find the proton"

cd "$prefix" || die "Failed to cd into $prefix"
echo "Prefix is '$prefix'"
STEAM_COMPAT_CLIENT_INSTALL_PATH="$install" \
    STEAM_COMPAT_DATA_PATH="$compat" \
    WINEPREFIX="$prefix" \
    "$proton" run "$executable"