check_pkg_version.sh

#!/bin/sh
# This command is make sure current version and target version are equal.

PACKAGE_NAME=$1
PREF_FILE="/etc/apt/preferences.d/${PACKAGE_NAME}.pref"
if [ ! -e "${PREF_FILE}" ]; then
  echo "${PACKAGE_NAME}.pref is not found. Before using, please deploy config file of 'apt pinning'."
  exit 1
fi

PACKAGE_VERSION=$(grep 'Pin:' "${PREF_FILE}"| sed -e 's/Pin: release v=//')
# check package version
dpkg -s ${PACKAGE_NAME}| grep -q "Version: ${PACKAGE_VERSION}" && exit 0 || exit 1