#!/bin/bash

# set -o xtrace

# return null string when filename expansion fails
shopt -s nullglob

declare cdir=$HOME/.offlineimap opts=("$@")
declare logfile=$cdir/log lockfile=($cdir/*lock) timestamp=$(date "+%F %T %Z")

exec 2>&1
exec >> $logfile

# clean-up past runs
[[ -e $lockfile ]] && rm $lockfile && \
    echo "$timestamp: Cleaning up lock file $lockfile"

# sync with Gmail if imap server is reachable
nc -z imap.gmail.com 993 &> /dev/null && {
    echo "$timestamp: Syncing with Gmail";
    offlineimap "${opts[@]}";
}