#!/usr/bin/env bash
#
# Copyright (c) 2016-2018 The Brenwill Workshop Ltd.
#
# fetchDependencies - Retrieves the correct versions of all dependencies
#
# macOS usage: ./fetchDependencies
#


# ----------------- Functions -------------------

# Update a repository. If it exists, fetch it, if not clone it.
# $1 repo name
# $2 repo url
# $3 repo revision (commit SHA)
update_repo() {
	echo "$1 repo: $2"
	echo "$1 revision: $3"

	if [ -d $1 -a -d $1/.git ]; then
		cd $1
		git fetch --all
		git checkout --force $3
		cd -
	else
		rm -rf $1
		git clone $2 $1
		cd $1
		git checkout $3
		cd -
	fi
}

# Build a repository
# $1 repo name
build_repo() {
	echo "Building $1"

	mkdir -p $1/build
	cd $1/build
	if type ninja >/dev/null 2>&1 ; then
		cmake -G Ninja -D CMAKE_BUILD_TYPE=Release -D CMAKE_INSTALL_PREFIX=install ..
		ninja
	else
		cmake -D CMAKE_BUILD_TYPE=Release -D CMAKE_INSTALL_PREFIX=install ..
		make
	fi

	make install

	cd -
}


# ----------------- Main -------------------

EXT_DIR=External
EXT_REV_DIR=ExternalRevisions

echo
echo Retrieving MoltenVK dependencies into ${EXT_DIR}.
echo

mkdir -p ${EXT_DIR}
cd ${EXT_DIR}

# ----------------- Cereal -------------------

REPO_NAME=cereal
REPO_URL="https://github.com/USCiLab/${REPO_NAME}.git"
REPO_REV=$(cat "../${EXT_REV_DIR}/${REPO_NAME}_repo_revision")

update_repo ${REPO_NAME} ${REPO_URL} ${REPO_REV}


# ----------------- Vulkan-Headers -------------------

REPO_NAME=Vulkan-Headers
REPO_URL="https://github.com/KhronosGroup/${REPO_NAME}.git"
REPO_REV=$(cat "../${EXT_REV_DIR}/${REPO_NAME}_repo_revision")

update_repo ${REPO_NAME} ${REPO_URL} ${REPO_REV}


# ----------------- SPIRV-Cross -------------------

REPO_NAME=SPIRV-Cross
REPO_URL="https://github.com/KhronosGroup/${REPO_NAME}.git"
REPO_REV=$(cat "../${EXT_REV_DIR}/${REPO_NAME}_repo_revision")

update_repo ${REPO_NAME} ${REPO_URL} ${REPO_REV}


# ----------------- glslang -------------------

REPO_NAME=glslang
REPO_URL="https://github.com/KhronosGroup/${REPO_NAME}.git"
REPO_REV=$(cat "../${EXT_REV_DIR}/${REPO_NAME}_repo_revision")

update_repo ${REPO_NAME} ${REPO_URL} ${REPO_REV}

cd ${REPO_NAME}
./update_glslang_sources.py
cd -

build_repo ${REPO_NAME}


# ----------------- Vulkan-Tools -------------------

REPO_NAME=Vulkan-Tools
REPO_URL="https://github.com/KhronosGroup/${REPO_NAME}.git"
REPO_REV=$(cat "../${EXT_REV_DIR}/${REPO_NAME}_repo_revision")

update_repo ${REPO_NAME} ${REPO_URL} ${REPO_REV}


# ----------------- VulkanSamples -------------------

REPO_NAME=VulkanSamples
REPO_URL="https://github.com/LunarG/${REPO_NAME}.git"
REPO_REV=$(cat "../${EXT_REV_DIR}/${REPO_NAME}_repo_revision")

update_repo ${REPO_NAME} ${REPO_URL} ${REPO_REV}


cd ..