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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>
</div>
<div id='container'>
<div id='contents'>
<div id='intro'>
Bundler manages an <strong>application's dependencies</strong> through its
entire life across many machines systematically and repeatably.
</div>
<h2>Getting Started</h2>
<div class='contents'>
<div class='bullet'>
<div class='description'>
Getting started with bundler is easy
</div>
<pre class="highlight plaintext">$ gem install bundler
</pre>
</div>
<div class='bullet'>
<div class='description'>
If you're on an old version of Rubygems
(before 1.3.6)
</div>
<pre class="highlight plaintext">$ gem update --system
</pre>
</div>
<div class='bullet'>
<div class='description'>
Specify your dependencies in a Gemfile in your project's root
</div>
<pre class="highlight ruby"><span class="n">source</span> <span class="s1">'http://rubygems.org'</span>
<span class="n">gem</span> <span class="s1">'nokogiri'</span>
<span class="n">gem</span> <span class="s1">'rack'</span><span class="p">,</span> <span class="s1">'~>1.1'</span>
<span class="n">gem</span> <span class="s1">'rspec'</span><span class="p">,</span> <span class="ss">:require</span> <span class="o">=></span> <span class="s1">'spec'</span></pre>
<a href="/v0.9/gemfile.html">Learn More: Gemfiles</a>
</div>
<div class='bullet'>
<div class='description'>
Install all of the required gems from your specified sources
</div>
<pre class="highlight plaintext">$ bundle install
$ git add Gemfile</pre>
<a href="/v0.9/bundle_install.html">Learn More: bundle install</a>
</div>
<div class='bullet'>
<div class='description'>
Inside your app, load up the bundled environment
</div>
<pre class="highlight ruby"><span class="nb">require</span> <span class="s1">'rubygems'</span>
<span class="nb">require</span> <span class="s1">'bundler'</span>
<span class="no">Bundler</span><span class="p">.</span><span class="nf">setup</span>

<span class="nb">require</span> <span class="s1">'nokogiri'</span>
<span class="c1"># any other requires you might need</span></pre>
<a href="/v0.9/bundler_setup.html">Learn More: Bundler.setup</a>
</div>
<div class='bullet'>
<div class='description'>
Run a script provided by a bundled gem
</div>
<pre class="highlight plaintext">$ bundle exec rackup
</pre>
</div>
<div class='bullet'>
<div class='description'>
When you're ready to share your application or deploy it, lock down all the versions of the gems you're using
</div>
<pre class="highlight plaintext">$ bundle lock
$ git add Gemfile.lock</pre>
<a href="/v0.9/bundle_lock.html">Learn more: bundle lock</a>
</div>
</div>
<h2>Using Bundler with Frameworks</h2>
<div class='contents'>
<div class='bullet'>
<div class='description'>
Bundler works out of the box with Rails 3. Once you understand the basics of using bundler, you know everything you need to know.
<a href="/v0.9/rails3.html">Using Bundler with Rails 3</a>
</div>
</div>
<div class='bullet'>
<div class='description'>
Bundler works with Rails 2.3 with a small change to boot.rb and adding a preinitializer.rb.
<a href="/v0.9/rails23.html">Using Bundler with Rails 2.3</a>
</div>
</div>
<!-- .bullet -->
<!-- .description -->
<!-- Setting up Sinatra to use Bundler is as simple as using Bundler itself. -->
<!-- = link_to 'Using Bundler with Sinatra', 'sinatra.html' -->
</div>
<h2>Checking Out an Application With a Gemfile</h2>
<div class='contents'>
<div class='bullet'>
<div class='description'>
Install the required gems
</div>
<pre class="highlight plaintext">$ bundle install</pre>
<a href="/v0.9/bundle_install.html">Learn More: bundle install</a>
</div>
</div>
<h2>Digging Further</h2>
<div class='contents'>
<div class='bullet'>
<div class='description'>
Store all of the required gems in your application. All future installs will get gems from this cache, bypassing rubygems.org
</div>
<pre class="highlight plaintext">$ bundle package</pre>
<a href="/v0.9/bundle_package.html">Learn More: bundle package</a>
</div>
<div class='bullet'>
<div class='description'>
Put dependencies in a group, so they can be ignored at install time or required together in your application
</div>
<pre class="highlight ruby"><span class="n">group</span> <span class="ss">:development</span> <span class="k">do</span>
 <span class="n">gem</span> <span class="s1">'wirble'</span>
<span class="k">end</span></pre>
<a href="/v0.9/groups.html">Learn more: Groups</a>
</div>
<div class='bullet'>
<div class='description'>
Use a gem that is stored in git and has a .gemspec at its root. Gemspecs with bins or C extensions are supported
</div>
<pre class="highlight ruby"><span class="n">gem</span> <span class="s1">'nokogiri'</span><span class="p">,</span> <span class="ss">:git</span> <span class="o">=></span> <span class="s1">'https://github.com/tenderlove/nokogiri.git'</span></pre>
<a href="/v0.9/git.html">Learn more: Git</a>
</div>
<div class='bullet'>
<div class='description'>
Use a gem that you are actively developing on your file system
</div>
<pre class="highlight ruby"><span class="n">gem</span> <span class="s1">'nokogiri'</span><span class="p">,</span> <span class="ss">:path</span> <span class="o">=></span> <span class="s1">'~/Code/nokogiri'</span>
</pre>
</div>
<div class='bullet'>
<div class='description'>
Install gems to a different location
(the default is ~/.bundle)
</div>
<div class='how'>
<pre class="highlight plaintext">$ bundle install vendor --disable-shared-gems</pre>
<div class='notes'>
By specifying --disable-shared-gems, you are telling bundler to install the gems into vendor, even if they are already installed in the system
</div>
</div>
<a href="/v0.9/bundle_install.html">Learn More: bundle install</a>
</div>
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and <a href="/sponsors.html">sponsors</a>
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