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<!DOCTYPE html>
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<title>Bundler: The best way to manage a Ruby application's gems</title>
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<a class="image" href="/"><img width="725" alt="The best way to manage your application's dependencies" src="/images/gembundler.png" /></a>
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<div id='intro'>
Rails 3 comes with baked in support with bundler.
</div>
<h2>Using Bundler with Rails 3</h2>
<div class='contents'>
<div class='bullet'>
<div class='description'>
Install Rails as you normally would. Use sudo if you would normally use
sudo to install gems.
</div>
<div class='how'>
<pre class="highlight plaintext">$ gem install rails</pre>
<div class='notes'>
We recommend using rvm for dependable Ruby installations, especially if
you are switching between different versions of Ruby
</div>
</div>
</div>
<div class='bullet'>
<div class='description'>
Generate a Rails app as usual
</div>
<pre class="highlight plaintext">$ rails new myapp
$ cd myapp
</pre>
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<div class='bullet'>
<div class='description'>
Run the server. Bundler is transparently managing your dependencies!
</div>
<pre class="highlight plaintext">$ rails server
</pre>
</div>
<div class='bullet'>
<div class='description'>
Add new dependencies to your Gemfile as you need them.
</div>
<pre class="highlight ruby"><span class="n">gem</span> <span class="s1">'nokogiri'</span>
<span class="n">gem</span> <span class="s1">'geokit'</span>
</pre>
</div>
<div class='bullet'>
<div class='description'>
If you want a dependency to be loaded only in a certain Rails environment,
place it in a group named after that Rails environment
</div>
<pre class="highlight ruby"><span class="n">group</span> <span class="ss">:test</span> <span class="k">do</span>
 <span class="n">gem</span> <span class="s1">'rspec'</span>
 <span class="n">gem</span> <span class="s1">'faker'</span>
<span class="k">end</span>
</pre>
</div>
<div class='bullet' id='shared_with_23'>
<div class='description'>
You can place a dependency in multiple groups at once as well
</div>
<pre class="highlight ruby"><span class="n">group</span> <span class="ss">:development</span><span class="p">,</span> <span class="ss">:test</span> <span class="k">do</span>
 <span class="n">gem</span> <span class="s1">'wirble'</span>
 <span class="n">gem</span> <span class="s1">'ruby-debug'</span>
<span class="k">end</span></pre>
<a href="/v1.1/groups.html">Learn More: Groups</a>
</div>
<div class='bullet'>
<div class='description'>
After adding a dependency, if it is not yet installed, install it
</div>
<div class='how'>
<pre class="highlight plaintext">$ bundle install</pre>
<div class='notes'>
This will update all dependencies in your Gemfile to the latest versions
that do not conflict with other dependencies
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