Downloads Gmail attachments of e-mails where the sender matches the given string.

gmail-download.rb

#!/usr/bin/env ruby
# -*- encoding: utf-8 -*-

require 'gmail'
require 'fileutils'
require 'pry'

username = 'YOUR_MAIL_ADDRESS_HERE'
password = 'YOUR_PASSWORD_HERE'

arg = ARGV[0].to_s

Gmail.connect(username, password) do |gmail|
	if gmail.logged_in?
		emails = gmail.mailbox('[Gmail]/All Mail').emails(:from => arg) # .find(arg)

		if !emails.empty?
			puts "Found #{emails.length} emails matching #{arg}"

			emails.reverse.each do |email|
				if !email.message.attachments.empty?

					dir = "#{Dir.pwd}/#{arg}/#{email.message.date.strftime('%Y/%m/%d')}"
					Dir.exists?(dir) || FileUtils.mkdir_p(dir)

					email.message.attachments.each do |attachment|
						puts "Downloading #{attachment.filename} to #{dir}"
						File.write(File.join(dir, attachment.filename), attachment.body.decoded)
					end
				end
			end
		end
	end
	puts "Done. Good bye!"
end