#!/bin/bash
# Cache the file for 30 minutes
# If you want to override this, put the command in cron.
# We cache because it is a 1sec delay, which is painful for the poller
if [ -x /usr/bin/dpkg-query ]; then
  DATE=$(date +%s)
  FILE=/var/cache/librenms/agent-local-dpkg

  [ -d /var/cache/librenms ] || mkdir -p /var/cache/librenms

  refresh() {
    dpkg-query -W --showformat='${Status} ${Package} ${Version} ${Architecture} ${Installed-Size}\n' \
      | grep " installed " | cut -d\  -f4- > "$FILE"
  }

  if [ ! -e "$FILE" ]; then
    refresh
  fi
  FILEMTIME=$(stat -c %Y "$FILE")
  FILEAGE=$((DATE - FILEMTIME))
  if [ "$FILEAGE" -gt 1800 ]; then
    refresh
  fi
  echo "<<<dpkg>>>"
  cat "$FILE"
fi