gmail_new_messages

#! /bin/bash
#
# do a quick check if there are new messages in a gmail account
#
# based on: http://cpbl.wordpress.com/2011/11/16/how-to-alpine-maildir-offlineimap/
#
# Gaute Hope / 2013-12-13 / eg@gaute.vetsj.com
#
# requires: curl
#
# usage: gmail_new_messages username password

if [ ! $# -eq 2 ]; then
  echo "$0 takes two arguments: username and password"
  exit 2
fi

mkdir -p $HOME/.cache/new_gmail
newfile="${HOME}/.cache/new_gmail/${1}_new_gmail"
oldfile="${HOME}/.cache/new_gmail/${1}_old_gmail"

curl -u $1:$2 --silent "https://mail.google.com/mail/feed/atom" | perl -ne 'print "\t" if //; print "$2\n" if /(.*)/;' > $newfile

touch $newfile
touch $oldfile

cmp -s $oldfile $newfile > /dev/null

ret=$?

cp $newfile $oldfile

if [ $ret -eq 1 ]; then
  echo "$1: new mail"
  exit 1
else
  echo "$1: no new mail"
  exit 0
fi