tweet a message with a cute baby animal image

cutetweet.rb

require 'optparse'
require 'google-search'
require 'twitter'

options = {}

optparse = OptionParser.new do |opts|
	opts.on('-t', '--tweet MESSAGE', "Message to tweet") do |f|
		options[:tweet] = f
	end
	opts.on('-k', '--consumer-key TWITTER_CONSUMER_KEY', "Twitter Consumer Key") do |f|
		options[:consumer_key] = f
	end
	opts.on('-s', '--consumer-secret TWITTER_CONSUMER_SECRET', "Twitter Consumer Secret") do |f|
		options[:consumer_secret] = f
	end
	opts.on('-o', '--oauth-token TWITTER_OAUTH_TOKEN', "Your Twitter OAuth Token") do |f|
		options[:oauth_token] = f
	end
	opts.on('-a', '--oauth-token-secret TWITTER_OAUTH_TOKEN_SECRET', "Your Twitter OAuth Token Secret") do |f|
		options[:oauth_token_secret] = f
	end
end

begin
	optparse.parse!
	options[:consumer_key] ||= ENV['TWITTER_CONSUMER_KEY']
	options[:consumer_secret] ||= ENV['TWITTER_CONSUMER_SECRET']
	options[:oauth_token] ||= ENV['TWITTER_OAUTH_TOKEN']
	options[:oauth_token_secret] ||= ENV['TWITTER_OAUTH_TOKEN_SECRET']
	mandatory = [:tweet, :consumer_key, :consumer_secret, :oauth_token, :oauth_token_secret]
	missing = mandatory.select{ |param| options[param].nil? }
  	if not missing.empty?
    	puts "Missing options: #{missing.join(', ')}"
    	puts optparse
    	exit
    end
    g = Google::Search::Image.new(:query => 'cute baby animals')
    image = g.entries.sample
    tweet = "#{options[:tweet]} #{image.uri}"
    puts "Tweeting: #{tweet}"
    twitter = Twitter::Client.new(options)
    twitter.update(tweet)
rescue OptionParser::InvalidOption, OptionParser::MissingArgument
	puts $!.to_s
end