Use rvm to force specific Ruby in Xcode Run Script build phase

Question

Outside of Xcode I use a specific version of Ruby, using RVM to manage multiple Ruby installations.

Apple\'s command line dev tools install Ruby at /usr/bin/ru

Answer 1

I had the same (well, worse) problem, and the code that follows worked for me. The key thing to realize is that, on the command line, you are using <something>/bin/rvm, but in a shell script, in order for rvm to change that environment, you must use a function, and you must first load that function to your shell script by calling source <something>/scripts/rvm. More on all this here.

This code is also gisted.

#!/usr/bin/env bash

# Xcode scripting does not invoke rvm. To get the correct ruby,
# we must invoke rvm manually. This requires loading the rvm 
# *shell function*, which can manipulate the active shell-script
# environment.
# cf. http://rvm.io/workflow/scripting

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

  # First try to load from a user install
  source "$HOME/.rvm/scripts/rvm"

elif [[ -s "/usr/local/rvm/scripts/rvm" ]] ; then

  # Then try to load from a root install
  source "/usr/local/rvm/scripts/rvm"
else

  printf "ERROR: An RVM installation was not found.\n"
  exit 128
fi

# rvm will use the controlling versioning (e.g. .ruby-version) for the
# pwd using this function call.
rvm use .

As a protip, I find embedding shell code in a project.pbxproj file yucky. For all but the most trivial stuff, my actual run script step is usually just a one-line call out to an external script:

Answer 2

Try this at the beginning of your script in Xcode:

source "$HOME/.rvm/scripts/rvm"