How do I install ruby-rvm?

Question

I want to install a rails environment on Ubuntu 11.04. I tried:

$ sudo apt-get install ruby-rvm

But got the error:

Unable to locate package ruby-rvm

My other PC has Ubuntu 11.10, and this works fine there:

$ sudo apt-get install ruby-rvm
$ rvm install ruby-1.9.3-p125
$ sudo gem update --system
$ sudo gem install rails

Answer 1

The ruby-rvm package is only present since Ubuntu 11.10. Furthermore, one of its dependencies, libreadline-gplv2-dev, only exists under this name since Ubuntu 11.10.

There is a version of ruby-rvm in the Canonical-SIG 3rd party testing PPA. It's for testing, so there may be bugs. See Add a Personal Package Archive (PPA) in the Ubuntu documentation for how to install software from a PPA.

You can grab the package source and compile it on your machine. Download the source from the Ubuntu 11.10 package page (you need all three files: .dsc, .orig.tar.gz and .debian.tar.gz). Install development tools and build dependencies, compile the package, install run-time dependencies and install the package.

wget http://archive.ubuntu.com/ubuntu/pool/universe/r/ruby-rvm/ruby-rvm_1.6.9-0ubuntu2.dsc http://archive.ubuntu.com/ubuntu/pool/universe/r/ruby-rvm/ruby-rvm_1.6.9.orig.tar.gz http://archive.ubuntu.com/ubuntu/pool/universe/r/ruby-rvm/ruby-rvm_1.6.9-0ubuntu2.debian.tar.gz
sudo apt-get install build-essential fakeroot debhelper ruby
dpkg-source -x ruby-rvm_1.6.9-0ubuntu2.dsc
cd ruby-rvm*
dpkg-buildpackage -rfakeroot -b -nc -us -uc
cd ..
apt-get install adduser bison curl file git libreadline5-dev libsqlite3-dev libxml2-dev zlib1g-dev
dpkg -i ruby-rvm_1.6.9-0ubuntu2_*.deb

Answer 2

A simple way to install RVM is to follow the instructions at the developer's site (in fact, the site says "Please use the install process(es) from this site only, as this is the only supported installation types and methods."):

curl -L get.rvm.io | bash -s stable

Load RVM:

source ~/.rvm/scripts/rvm

Find the requirements (follow the instructions):

rvm requirements

Install ruby:

rvm install 1.9.3

On my system (12.04), this all went without a hitch; requirements listed were easy to find and install using apt-get.

Answer 3

Try to search ruby-based packages via:

apt-cache search ruby

or you can add | grep ^ruby, if you know, that name of this package started by ruby.