RBEnv, Ubuntu and Bundler

Feb 10, 2013

A how to for setting up ubuntu for ruby on rails development

You want to checkout rbenv and the plugin ruby-build:

cd ~/
git clone git:// .rbenv
git clone git:// ~/.rbenv/plugins/ruby-build

Then add it to your path so it actually runs ruby versions installed by rbenv

echo 'export PATH="$PATH:$HOME/.rbenv/bin"' >> ~/.bashrc
echo 'eval "$(rbenv init -)"' >> ~/.bashrc
exec $SHELL

And the reason for the blog post... avoid a host of issues includes the "LoadError cannot load such file -- zlib" error, do this step before installing ruby. I spiced it up with postgresql and imagemagick; if you plan on using heroku and dealing with images, you'll want those too.

sudo apt-get install build-essential libreadline-dev libssl-dev zlib1g-dev libsqlite3-dev nodejs libxslt-dev libxml2-dev libpq-dev postgresql imagemagick libmagickwand-dev

Then use rbenv to install a version of ruby and set it as global

rbenv install 2.5.1
rbenv global 2.5.1

Now this should show you the ruby version

ruby -v

The step other howto's forget; you want to develop in rails right? Then you'll want to install rails and bundler in the global gems

gem install rails
rbenv rehash
gem install bundler
rbenv rehash

Alias Goodness

I've been really enjoying these commands to shortcut using bundler exec before everything add these to your ~/.bashrc

alias b="bundle"
alias bi="b install --path vendor"
alias bu="b update"

And you're all set

Read more on rbenv and bundler