#!/bin/bash

fetch_source() {
	if ! [ -d "src/.git" ]; then
		git clone --depth 1 "${REQUIRED_GIT}" --branch "$REQUIRED_BRANCH" src || perror "Could not clone busybox git"
	fi
	cde src
	# Needed for newer glibc
	if ! grep -q 'OPT_SET.*clock_settime.*CLOCK_REALTIME' "coreutils/date.c"; then
		git apply "${MODULE_DIR}/1_31_1-stime.patch" || perror "Could not apply stime patch for 1.31.1"
	fi
	# Hack for backwards compat to old busybox which required -t (timeout -t [SECS] [PROG...])
	if ! grep -q 'getopt32.*"t"' "coreutils/timeout.c"; then
		git apply "${MODULE_DIR}/timeout-compat.patch" || perror "Could not apply timeout backwards compat patch"
	fi
	# Patch background filling if not patched yet
	if ! grep -q "bfill_background" "miscutils/fbsplash.c"; then
		git apply "${MODULE_DIR}/fbsplash-fillbg.patch" || perror "Could not apply busybox patch for fbsplash background filling"
	fi
	# Add support for just manipulating alarm, without any standby/hibernation
	if ! grep -q 'suspend.*"no"' "util-linux/rtcwake.c"; then
		git apply "${MODULE_DIR}/rtcwake-compat.patch" || perror "Could not apply busybox patch for rtcwake compat with util-linux"
	fi
	# make sure Makefile allows a preset CC
	if [ -n "$CC" ]; then
		sed -i -r 's/^CC\s*=\s*(\S)/CC ?= \1/' Makefile || perror "Could not patch Makefile"
	fi
}

build() {
	cp "${MODULE_DIR}/openslx-busybox-config" "src/.config"
	cde src
	yes '' | make oldconfig
	pinfo "Running make (if this hangs, check for unset options, ie. when you increased the REQUIRED_BRANCH)"
	make || perror "failed."
	pinfo "Running make install"
	local INSTALL_PREFIX="${MODULE_BUILD_DIR}/opt/openslx"
	make CONFIG_PREFIX="${INSTALL_PREFIX}" install || perror "failed"
	rm -f "${INSTALL_PREFIX}/bin/mount" "${INSTALL_PREFIX}/bin/umount" "${INSTALL_PREFIX}/bin/bash"
	cd - &> /dev/null
}

post_copy() {
	mkdir -p "${TARGET_BUILD_DIR}/bin" || perror "Failed to create '${TARGET_BUILD_DIR}/bin'."
	ln -sf "/opt/openslx/bin/busybox" "${TARGET_BUILD_DIR}/bin/ash" || \
		perror "Failed to link '${TARGET_BUILD_DIR}/bin/ash' to '/opt/openslx/bin/busybox'."
}