Scripting with User Switch Command

I have used Expect for this, as it is designed for automating usage of interactive programs.

I no longer use the script but here it is for reference: refresh.exp · master · Mikko Ahlroth / mebe · GitLab – it should help you get started in case you go with Expect.

Note that on line 14, send " " sends the ctrl+g IIRC. It may not be copied correctly if you copy it with a browser so you may want to download the file directly. (And indeed if I copy it to this forum, it’s rendered as send "a"!)

EDIT: Note that there is also a --remsh option for IEx. Maybe that already does what you need, at least partly?

Thanks @Nicd,

I have implemented it as expect-script now and will try to improve it. For others with a similar problem, here is my current solution that seems to do the trick:

set username [lindex $argv 0]
set app_ip [lindex $argv 1] 
spawn ./start-iex $username

expect "iex" { send "Node.connect :\"app@$app_ip\"" }
expect "iex" { send "^G" } # this might break while copy-pasting - it is the CTRL+G command
expect -- " -->" { send "r 'app@$app_ip' \n" }
expect -- " -->" { send "c 2\n" }
expect "(app@*" { send "^G" } # see above
expect -- " -->" { send "r 'app@$app_ip' 'Elixir.IEx'\n" }
expect -- " -->" { send "c 3\n" }

interact

I have not used expect before, so if you see any unnecessary parts let me know .

And if anybody knows a way to enter the user switch command mode within an elixir script, let me know.