#!/bin/bash
# Copyright 2016-2021 The Khronos Group Inc.
# SPDX-License-Identifier: Apache-2.0

GLSLANG_REV=06a7078ce74ab5c7801a165b8145859678831fb8
SPIRV_TOOLS_REV=f62e121b0df5374d1f043d1fbda98467406af0b1
SPIRV_HEADERS_REV=d13b52222c39a7e9a401b44646f0ca3a640fbd47
PROTOCOL=https

if [ -d external/glslang ]; then
	echo "Updating glslang to revision $GLSLANG_REV."
	cd external/glslang
	git fetch origin
	git checkout $GLSLANG_REV
else
	echo "Cloning glslang revision $GLSLANG_REV."
	mkdir -p external
	cd external
	git clone $PROTOCOL://github.com/KhronosGroup/glslang.git
	cd glslang
	git checkout $GLSLANG_REV
fi
cd ../..

if [ -d external/spirv-tools ]; then
	echo "Updating SPIRV-Tools to revision $SPIRV_TOOLS_REV."
	cd external/spirv-tools
	git fetch origin
	git checkout $SPIRV_TOOLS_REV
else
	echo "Cloning SPIRV-Tools revision $SPIRV_TOOLS_REV."
	mkdir -p external
	cd external
	git clone $PROTOCOL://github.com/KhronosGroup/SPIRV-Tools.git spirv-tools
	cd spirv-tools
	git checkout $SPIRV_TOOLS_REV
fi

if [ -d external/spirv-headers ]; then
	cd external/spirv-headers
	git fetch origin
	git checkout $SPIRV_HEADERS_REV
	cd ../..
else
	git clone $PROTOCOL://github.com/KhronosGroup/SPIRV-Headers.git external/spirv-headers
	cd external/spirv-headers
	git checkout $SPIRV_HEADERS_REV
	cd ../..
fi

cd ../..