RBEnv, Ubuntu and Bundler

2013-02-10

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://github.com/sstephenson/rbenv.git .rbenv
git clone git://github.com/sstephenson/ruby-build.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 1.9.3-p484
rbenv global 1.9.3-p484

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 --version "=3.2.13"
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 bil="bi --local"
alias bu="b update"
alias be="b exec"
alias binit="bi && b package && echo 'vendor/ruby' >> .gitignore"
alias ber="be rspec"
alias berp="be rake db:test:prepare && ber"

And you're all set

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