Environment setting for custom Wine usage

wine_env.sh

#!/bin/bash

# Helper script for wine_run.sh / winetricks_run.sh
# Sets environment and detects prefix arch. See wine_run.sh for details
# on configurable variables usage.

function get_wine_arch() {
   local prefix="${WINEPREFIX:-"${HOME}/.wine"}"
   local registry_winearch=$(perl -ne 'print $1 if /#arch=(win\d+)/' "${prefix}/system.reg" 2>/dev/null)
   wine_arch=${WINEARCH:-"$registry_winearch"}

   if [[ "$wine_arch" == "" ]]; then
     # WINEARCH was not set and prefix has no info, using win64 as default.
     wine_arch="win64"
   elif [[ "$wine_arch" != "win64" ]] && [[ "$wine_arch" != "win32" ]]; then
     echo "Unexpected Wine arch ${wine_arch} encountered. Aborting!" >&2
     echo "WINEARCH='${WINEARCH}', registry_winearch='${registry_winearch}'" >&2
     exit 1
   fi

   printf $wine_arch
}

export wine_arch=$(get_wine_arch)

arch_suffix=""
if [[ "$wine_arch" == "win64" ]]; then
   arch_suffix="64"
fi

export wine_bin=${wine_bin:-"wine${arch_suffix}"}

if [[ "${WINEPATH+isset}" ]]; then
   export PATH=${WINEPATH}/bin:$PATH 
   export LD_LIBRARY_PATH="${WINEPATH}/lib64/wine/x86_64-unix:${WINEPATH}/lib/wine/i386-unix:${LD_LIBRARY_PATH}"
fi