alpine: workarounds for use cases with custom exports files

entrypoint.sh

@@ -1,5 +1,5 @@
 #!/bin/bash
-set -xuo pipefail
+set -xo pipefail
 trap "stop; exit 0;" SIGTERM SIGINT
 
 stop()
@@ -13,7 +13,7 @@ stop()
 	exit
 }
 
-DEFALUT_TIMEZONE="America/New York"
+DEFALUT_TIMEZONE="America/New_York"
 DEFAULT_PERMITTED="*"
 RW_MODE="rw"
 UID=${NFS_UID:-0}
@@ -39,6 +39,23 @@ if [ -n "${SHARED_DIRECTORY}" ]; then
 EOE
 
 	chmod 777 "${SHARED_DIRECTORY}"
+else
+	cp /etc/exports.mnt /etc/exports
+	grep -vi "^[[:space:]]*#" /etc/exports | while read -r line; do
+			if [ -n "${line}" ]; then
+				trimmed="${line##*([[:space:]])}"
+				# shellcheck disable=SC2001
+				rcdir="$(eval "declare -a str=($( echo "$trimmed" | sed 's/[][`~!@#$%^&*():;<>.,?|{}=+-]/\\&/g' )); echo \${str[0]}")"
+				cdir="${rcdir##*(\")}"
+				echo "${cdir}"
+				mkdir -p "/exports${cdir}"
+				mount --bind -o rw "${cdir}" "/exports${cdir}"
+				chmod 777 "/exports${cdir}"
+			fi
+	done
+	sed -i -r '/^[[:space:]]*#/!s/^("?)/\1\/exports/' /etc/exports
+	# root entry
+	echo -e "\n/exports *(rw,no_root_squash,insecure,no_subtree_check,nohide,fsid=0,sync,sec=krb5p:krb5i:krb5)" >> /etc/exports
 fi
 
 # setup logging
@@ -48,9 +65,6 @@ syslogd
 
 exportfs -rvaf
 
-echo "${NFS_KRB_REALM}" > /etc/hostname
-
-
 export OPTS_RPC_MOUNTD='--debug all -t 8 -N 3'
 cat >> /etc/conf.d/nfs <<EOC
 OPTS_RPC_MOUNTD="${OPTS_RPC_MOUNTD}"