Emacs ansi-term as a login shell

Question

I am using Emacs Live. How can I configure emacs ansi-term to allow login shell? When I try to switch rvm gemsets I get the following message:

RVM is not a function, selecting rubies with 'rvm use ...' will not work.
    You need to change your terminal emulator preferences to allow login shell.
    Sometimes it is required to use `/bin/bash --login` as the command.
    Please visit https://rvm.io/integration/gnome-terminal/ for a example.

Thanks!

Answer 1

I found that if I add the following line, Emacs will find RVM as a function and stop complaining.

# Load RVM into a shell session *as a function*
[[ -s "$HOME/.rvm/scripts/rvm" ]] && source "$HOME/.rvm/scripts/rvm" 

Answer 2

When Mx ansi-term asks you which program to run, you should replace the default provided value by:

/bin/bash --login

before hitting RET