#!/bin/sh

if [ "$(id -u)" = "0" ]; then
	echo "Running as root will mess up file permissions. Aborting ..." 1>&2
	exit 1
fi

die()
{
	echo ERROR: "$*"
	exit 1
}

OS=${OS:="$(uname -s)"}

# Some of our makefiles depend on GNU make, so we set some sane defaults if MAKE
# is not set.
case "$OS" in
	"FreeBSD" | "OpenBSD")
		MAKE=${MAKE:="gmake"}
		;;
	*)
		MAKE=${MAKE:="make"}
		;;
esac

cd "$(dirname "$0")" || die
# Now in build/workspaces/ (where we assume this script resides)

# Parse command-line options:
premake_args=""

with_system_premake5=false
enable_atlas=true

JOBS=${JOBS:="-j2"}

for i in "$@"; do
	case $i in
		--with-system-premake5) with_system_premake5=true ;;
		--enable-atlas) enable_atlas=true ;;
		--disable-atlas) enable_atlas=false ;;
		-j*) JOBS=$i ;;
		# Assume any other --options are for Premake
		--*) premake_args="${premake_args} $i" ;;
	esac
done

if [ "$enable_atlas" = "true" ]; then
	premake_args="${premake_args} --atlas"
	if [ "$OS" = "Darwin" ]; then
		# Provide path to wx-config on OS X (as wxwidgets doesn't support pkgconfig)
		export WX_CONFIG="${WX_CONFIG:="$(pwd)/../../libraries/macos/wxwidgets/bin/wx-config"}"
	else
		export WX_CONFIG="${WX_CONFIG:="wx-config"}"
	fi

	if [ ! -x "$(command -v "$WX_CONFIG")" ]; then
		echo 'WX_CONFIG must be set and valid or wx-config must be present when --atlas is passed as argument.'
		exit 1
	fi
fi

if [ "$OS" = "Darwin" ]; then
	# Set minimal SDK version
	export MIN_OSX_VERSION="${MIN_OSX_VERSION:="10.12"}"
fi

# Now build Premake or use system's.

cd ../premake || die
premake_command="premake5"

if [ "$with_system_premake5" = "false" ]; then
	# Build bundled premake
	MAKE=${MAKE} JOBS=${JOBS} ./build.sh || die "Premake 5 build failed"

	premake_command="premake5/bin/release/premake5"
fi

echo

# If we're in bash then make HOSTTYPE available to Premake, for primitive arch-detection
export HOSTTYPE="$HOSTTYPE"
# Now run Premake to create the makefiles
echo "Premake args: ${premake_args}"
if [ "$OS" != "Darwin" ]; then
	# shellcheck disable=SC2086
	${premake_command} --file="premake5.lua" --outpath="../workspaces/gcc/" ${premake_args} gmake || die "Premake failed"
else
	# shellcheck disable=SC2086
	${premake_command} --file="premake5.lua" --outpath="../workspaces/gcc/" --macosx-version-min="${MIN_OSX_VERSION}" ${premake_args} gmake || die "Premake failed"
	# Also generate xcode workspaces if on OS X
	# shellcheck disable=SC2086
	${premake_command} --file="premake5.lua" --outpath="../workspaces/xcode4" --macosx-version-min="${MIN_OSX_VERSION}" ${premake_args} xcode4 || die "Premake failed"
fi

# test_root.cpp gets generated by cxxtestgen and passing different arguments to premake could require a regeneration of this file.
# It doesn't depend on anything in the makefiles, so make won't notice that the prebuild command for creating test_root.cpp needs to be triggered.
# We force this by deleting the file.
rm -f ../../source/test_root.cpp