nfs

#!/usr/bin/env bash

# TODO: netmask is hardcoded

function die(){  warn $*; exit 1; }
function warn(){ echo $* >&2; }

checksum(){
	sha1sum $* 2>/dev/null
}

FILE_NFS_EXPORTS=${FILE_NFS_EXPORTS:-/etc/exports.d/pixieboot.exports}
CMD_RELOAD_EXPORTS=${CMD_RELOAD_EXPORTS:-"exportfs -a"}

checksum_old=$(checksum $FILE_NFS_EXPORTS)

# Check if we're writing in etc exports, so we shouldn't overwrite any settings
if [ "/etc/exports" != "$FILE_NFS_EXPORTS" ]; then
	mkdir -p $(dirname $FILE_NFS_EXPORTS)
	echo "$NFSPREFIX $NFSHOST/24(ro,no_root_squash,sync,no_subtree_check)" > $FILE_NFS_EXPORTS
else
	if ! grep -q "^$NFSPREFIX" $FILE_NFS_EXPORTS; then
		echo "$NFSPREFIX $NFSHOST/24(ro,no_root_squash,sync,no_subtree_check)" >> $FILE_NFS_EXPORTS
	fi
fi

checksum_new=$(checksum $FILE_NFS_EXPORTS)

if [[ "$checksum_old" != "$checksum_new" ]]; then
	echo "dnsmasq's configuration changed. Reloading."
	${CMD_RELOAD_EXPORTS} || warn "Reloading NFS exports failed."
fi