Cannot change RVM gemset from shell script via `rvm gemset use`

Question

(See update at bottom)

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I feel like I\'m missing something terribly obvious here, but I can\'t change gemsets from within a shell script. This minimal script demons

Answer 1

Had exactly the same problem, and here's the solution:

#!/bin/bash

# IMPORTANT: Source RVM as a function into local environment.
#            Otherwise switching gemsets won't work.
[ -s "$HOME/.rvm/scripts/rvm" ] && . "$HOME/.rvm/scripts/rvm"

# Enable shell debugging.
set -x

rvm 1.9.2@gemset_a
rvm gemdir
gem env gemdir

rvm 1.9.2@gemset_b
rvm gemdir
gem env gemdir

What I've found out is that your interactive shell has got rvm() and its helpers, whereas script's environment has not got them. rvm binary is executed instead, partially working and thus causing some confusion.