For launching programs with custom Mesa

mesa_run.sh

#!/bin/bash

# Assumes Mesa libraries are installed in:
# /opt/${mesa}/<arch_dir>
# or in
# ${mesa_path}/<arch_dir>

# For explicit control of the run
mesa_run=${mesa_run:-true}
if ! $mesa_run; then
  "$@" &
  disown -h %+
  exit 0
fi

mesa=${mesa:-"mesa-main"}
mesa_arch=${mesa_arch:-"x86_64"}

# $mesa variable is a shortcut, setting /opt/$mesa for $mesa_path
# But explicitly set $mesa_path takes priority.
if [[ "${mesa+isset}" ]] && ! [[ "${mesa_path+isset}" ]]; then
  mesa_path="/opt/${mesa}"
fi

if [[ "$mesa_arch" == "x86_64" ]]; then
   vulkan_icd=radeon_icd.x86_64.json
elif [[ "$mesa_arch" == "x86" ]]; then
   vulkan_icd=radeon_icd.i686.json
else
   echo "Invalid Mesa arch ${mesa_arch} specified!"
   exit 1
fi

export LD_LIBRARY_PATH="${mesa_path}/${mesa_arch}:${LD_LIBRARY_PATH}"
export LIBGL_DRIVERS_PATH="${mesa_path}/${mesa_arch}"
export EGL_DRIVERS_PATH="${mesa_path}/${mesa_arch}"
export LIBVA_DRIVERS_PATH="${mesa_path}/${mesa_arch}"
export VK_ICD_FILENAMES="${mesa_path}/share/vulkan/icd.d/${vulkan_icd}"
export VK_ADD_LAYER_PATH="${mesa_path}/share/vulkan/explicit_layer.d:${mesa_path}/share/vulkan/implicit_layer.d:${VK_ADD_LAYER_PATH}"

echo "Mesa env:"
echo "LD_LIBRARY_PATH=${LD_LIBRARY_PATH}"
echo "LIBGL_DRIVERS_PATH=${LIBGL_DRIVERS_PATH}"
echo "EGL_DRIVERS_PATH=${EGL_DRIVERS_PATH}"
echo "LIBVA_DRIVERS_PATH=${LIBVA_DRIVERS_PATH}"
echo "VK_ICD_FILENAMES=${VK_ICD_FILENAMES}"
echo "VK_ADD_LAYER_PATH=${VK_ADD_LAYER_PATH}"
echo "VK_INSTANCE_LAYERS=${VK_INSTANCE_LAYERS}"
echo "==========================================="

"$@" &
disown -h %+