∞Using RVM with Cron

RVM allows few easy ways to integrate with cron

∞Direct calling RVM generated wrappers

For every installed ruby and created gemset RVM creates wrappers for basic command line tools like gem, rake, ruby. You can find them in $rvm_path/wrappers/<ruby-version>[@gemset-name].

So when the project ruby is 2.1.1@projectX then the following cron entries will work using the proper environment:

1 0  * * * /usr/local/rvm/wrappers/ruby-2.1.1@projectX/ruby /path/to/script.rb
1 15 * * * /usr/local/rvm/wrappers/ruby-2.1.1@projectX/rake update stats

∞Aliases

To simplify future changes of ruby version use aliases, it's the simplest way to ensure that configuration does not have to change when ruby version changes:

rvm alias create my-project ruby-2.1.1@projectX

then you can use the aliased path:

1 15 * * * /usr/local/rvm/wrappers/my-project/rake update stats

∞Loading RVM environment files in shell scripts

For every installed ruby and created gemset RVM creates environment files. You can find them by running:

rvm env --path -- ruby-version[@gemset-name]

Assuming the the project ruby@gemset is 2.1.1@projectX then calling:

rvm env --path -- 2.1.1@projectX

will return

/usr/local/rvm/environments/ruby-2.1.1@projectX

∞Example script

Basic shell script for interacting with rvm installed ruby would look like this:

#!/usr/bin/env bash

# load rvm ruby
source /usr/local/rvm/environments/ruby-2.1.1@projectX

bundle install
ruby /path/to/script.rb
rake do something