regex - Expect script that enters a username and password repeatedly -

i have script needs switch between various branches in subversion repository in order copy. results in having enter password repeatedly. now, once have done couple of time , script. mess causing me great anger.

i have used expect enter password on prompt before. hoping learn how expect run on multiple password prompts again , again , again, until task finished.

so far have.

#!/usr/bin/expect global env set timeout 10 spawn command requires password expect "^user" send "password\r" #i need repeat on , on until prompt stops showing up. 

please , thank you.

naive, brute force method:

while 1 {     expect $prompt     send $password\r } 

better:

expect {     $prompt {         send $password\r         exp_continue     }     timeout {         puts "haven't seen prompt $timeout seconds"     }     "some pattern indicates password no longer required" } puts "continuing ..."