bin/mail-notify

#!/usr/bin/env ruby
#
# pbrisbin 2014 - check a Maildir for new messages and spawn a notification via
# notify-send.
#
###
directory = ARGV.first || "#{ENV["HOME"]}/Maildir"
cachefile = "/tmp/mail-notify-message"
mailboxes = Hash.new(0)

Dir["#{directory}/**/*/new/*"].each do |message|
  unless message =~ %r{/(archive|drafts|sent|spam|trash)/}
    mailbox = message.sub(%r{#{directory}/(.*)/new/.*}, '\1')
    mailboxes[mailbox] += 1
  end
end

body = mailboxes.map { |mailbox, count| "- #{mailbox} (#{count})" }.join("\n")
cached_body = File.read(cachefile) rescue ""

if body != "" && body != cached_body
  system("notify-send", "-i", "mail_new", "--", "New mail", body)

  File.write(cachefile, body)
end