#!/usr/bin/env bash

SOURCE_DIR="$(pwd)"

BUILD_DIR="${SOURCE_DIR}/cppbuild/Release"

EXTRA_CMAKE_ARGS=""

BUILD_DELETE_CMAKE=false

BUILD_CMAKE_VERSION=4.3.0

BUILD_CMAKE_DIR="${SOURCE_DIR}/cppbuild/cmake"

ncpus=1

case "$(uname)" in

Darwin* )

ncpus=$(sysctl -n hw.ncpu)

BUILD_CMAKE_OS="macos-universal"

BUILD_CMAKE_PATH="${BUILD_CMAKE_DIR}/CMake.app/Contents/bin"

;;

Linux*)

ncpus=$(lscpu -p | grep -c -E -v '^#')

BUILD_CMAKE_OS="linux-$(arch)"

BUILD_CMAKE_PATH="${BUILD_CMAKE_DIR}/bin"

;;

esac

function install_cmake()

{

if [[ true = "${BUILD_DELETE_CMAKE}" ]]

then

echo "Removing old CMake installation"

rm -rf "${BUILD_CMAKE_DIR}"

fi

local version_file="${BUILD_CMAKE_DIR}/version.txt"

local version_info="${BUILD_CMAKE_VERSION}-${BUILD_CMAKE_OS}"

if [[ "${version_info}" != "$(cat "${version_file}")" ]]

then

echo "Installing CMake ${version_info}"

rm -rf "${BUILD_CMAKE_DIR}"

mkdir -p "${BUILD_CMAKE_DIR}"

(curl -LJ "https://github.com/Kitware/CMake/releases/download/v${BUILD_CMAKE_VERSION}/cmake-${BUILD_CMAKE_VERSION}-${BUILD_CMAKE_OS}.tar.gz" | tar xzf - -C "${BUILD_CMAKE_DIR}" --strip-components 1

echo "${version_info}" > "${version_file}")

fi

}

while [[ $# -gt 0 ]]

do

option="${1}"

case ${option} in

--c-warnings-as-errors)

EXTRA_CMAKE_ARGS="${EXTRA_CMAKE_ARGS} -DC_WARNINGS_AS_ERRORS=ON"

echo "Enabling warnings as errors for C"

shift

;;

--cxx-warnings-as-errors)

EXTRA_CMAKE_ARGS="${EXTRA_CMAKE_ARGS} -DCXX_WARNINGS_AS_ERRORS=ON"

echo "Enabling warnings as errors for C++"

shift

;;

-d|--debug-build)

EXTRA_CMAKE_ARGS="${EXTRA_CMAKE_ARGS} -DCMAKE_BUILD_TYPE=Debug"

export BUILD_DIR="${SOURCE_DIR}/cppbuild/Debug"

export BUILD_CONFIG=Debug

shift

;;

--sanitise-build)

EXTRA_CMAKE_ARGS="${EXTRA_CMAKE_ARGS} -DSANITISE_BUILD=ON"

echo "Enabling sanitise build"

shift

;;

--rebuild-cmake)

BUILD_DELETE_CMAKE=true

shift

;;

--cmake-version)

BUILD_CMAKE_VERSION=${2}

echo "Setting BUILD_CMAKE_VERSION=${2}"

shift

shift

;;

-h|--help)

echo "${0} [--c-warnings-as-errors] [--cxx-warnings-as-errors] [--debug-build] [--sanitise-build]"

exit

;;

*)

echo "Unknown option ${option}"

echo "Use --help for help"

exit

;;

esac

done

echo "Will make with \"-j ${ncpus}\"."

if [ -d "${BUILD_DIR}" ] ; then

echo "Build directory (${BUILD_DIR}) exists, removing."

rm -rf "${BUILD_DIR}"

fi

mkdir -p "${BUILD_DIR}"

install_cmake

cd "${BUILD_DIR}" || exit

("${BUILD_CMAKE_PATH}/cmake" -G "Unix Makefiles" ${EXTRA_CMAKE_ARGS} "${SOURCE_DIR}" && make clean && make -j ${ncpus} all && "${BUILD_CMAKE_PATH}/ctest" -C Release --output-on-failure)