#!/bin/sh
set -e

src_tarball=$(ls /usr/src/linux-source-* |sort -V | tail  -n1)
version=$(basename "$src_tarball" |sed -e 's/^linux-source-//' -e 's/\.tar\.xz//')
tarball_hash=.debian_src_tarball.sha512

src_dir=$(realpath linux-source)

if [ -d "$src_dir" -a -L "linux-source" ]
then
	if sha512sum -c "$tarball_hash"
	then
		exit 0
	fi

	if [ "$1" = "check" ]
	then
		exit 1
	fi

	make commit-config || true
	rm -Rf "$src_dir" || true
	rm "linux-source" || true

elif [ "$1" = "check" ]
then
	exit 1
fi

tar -xvf "$src_tarball"

ln -vs "linux-source-${version}" "linux-source"

sha512sum "$src_tarball" > "$tarball_hash"