gtalk.groovy

@Grab('jivesoftware:smack:3.0.4')
@Grab('jivesoftware:smackx:3.0.4')
import org.jivesoftware.smack.*

(username, password) = ['<<from_username>>', '<<from_password>>']
to = '<<to_username>>@gmail.com'

con = new XMPPConnection(
	new ConnectionConfiguration('talk.google.com', 5222, 'gmail.com'))
con.connect()
con.login(username, password)
chat = con.chatManager.createChat(to, { chat, msg ->
	chat.sendMessage(msg.body)
} as MessageListener)  
chat.sendMessage("Say something to me. I'll echo it.")

while(true) { sleep 1000 }