{% comment %}
Copyright (C) The Arvados Authors. All rights reserved.

SPDX-License-Identifier: CC-BY-SA-3.0
{% endcomment %}

Ruby 2.6 or newer is required.

* "Option 1: Install from packages":#packages
* "Option 2: Install with RVM":#rvm
* "Option 3: Install from source":#fromsource

h2(#packages). Option 1: Install from packages

{% include 'notebox_begin' %}
Future versions of Arvados may require a newer version of Ruby than is packaged with your OS.  Using OS packages simplifies initial install, but may complicate upgrades that rely on a newer Ruby.  If this is a concern, we recommend using "RVM":#rvm.
{% include 'notebox_end' %}

h3. Centos 7

The Ruby version shipped with Centos 7 is too old.  Use "RVM":#rvm to install a newer version of Ruby (we recommend installing version 2.7 or newer).

h3. Debian and Ubuntu

Debian 10 (buster) and Ubuntu 18.04 (bionic) ship with Ruby 2.5, which is too old for Arvados. Use "RVM":#rvm to install a newer version of Ruby (we recommend installing version 2.7 or newer).

Debian 11 (bullseye) and Ubuntu 20.04 (focal) and later ship with Ruby 2.7 or newer, which is sufficient for Arvados.

<notextile>
<pre><code># <span class="userinput">apt-get --no-install-recommends install ruby ruby-dev</span></code></pre>
</notextile>

h2(#rvm). Option 2: Install with RVM

h3. Install gpg and curl

h4. Centos 7

<pre>
yum install gpg curl which
</pre>

h4. Debian and Ubuntu

<pre>
apt-get --no-install-recommends install gpg curl
</pre>

h3. Install RVM, Ruby and Bundler

<notextile>
<pre><code># <span class="userinput">gpg --keyserver pgp.mit.edu --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3 7D2BAF1CF37B13E2069D6956105BD0E739499BDB
\curl -sSL https://get.rvm.io | bash -s stable --ruby=2.7
</span></code></pre></notextile>

This command installs the latest Ruby 2.7.x release, as well as the @gem@ and @bundle@ commands.

To use Ruby installed from RVM, load it in an open shell like this:

<notextile>
<pre><code><span class="userinput">source /usr/local/rvm/scripts/rvm
</span></code></pre></notextile>

Alternately you can use @rvm-exec@ (the first parameter is the ruby version to use, or "default"), for example:

<notextile>
<pre><code><span class="userinput">rvm-exec default ruby -v
</span></code></pre></notextile>

h2(#fromsource). Option 3: Install from source

Install prerequisites for Debian 10, Ubuntu 18.04 and Ubuntu 20.04:

<notextile>
<pre><code><span class="userinput">sudo apt-get install \
    bison build-essential gettext libcurl4 \
    libcurl4-openssl-dev libpcre3-dev libreadline-dev \
    libssl-dev libxslt1.1 zlib1g-dev
</span></code></pre></notextile>

Install prerequisites for CentOS 7:

<notextile>
<pre><code><span class="userinput">sudo yum install \
    libyaml-devel glibc-headers autoconf gcc-c++ glibc-devel \
    patch readline-devel zlib-devel libffi-devel openssl-devel \
    make automake libtool bison sqlite-devel tar
</span></code></pre></notextile>

Build and install Ruby:

<notextile>
<pre><code><span class="userinput">mkdir -p ~/src
cd ~/src
curl -f https://cache.ruby-lang.org/pub/ruby/2.7/ruby-2.7.5.tar.gz | tar xz
cd ruby-2.7.5
./configure --disable-install-rdoc
make
sudo make install

# Make sure the post install script can find the gem and ruby executables
sudo ln -s /usr/local/bin/gem /usr/bin/gem
sudo ln -s /usr/local/bin/ruby /usr/bin/ruby
# Install bundler
sudo -i gem install bundler</span>
</code></pre></notextile>