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<!DOCTYPE html>
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<head>
<title>Bundler: The best way to manage a Ruby application's gems</title>
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<div id='header'>
<a href="/"><img width="725" alt="The best way to manage your application's dependencies" src="/images/gembundler.png" />
</a>
</div>
<h2>Using Bundler with Rubygem gemspecs</h2>
<div class='contents'>
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<div class='description'>
If you're creating a gem from scratch, you can use bundler's built in gem skeleton to create a base gem for you to edit.
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<div class='how'>
<pre class='sunburst'>$ bundle gem my_gem</pre>
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This will create a new directory named <code>my_gem</code> with your new gem skeleton.
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If you already have a gem with a gemspec, you can generate a Gemfile for your gem.
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<pre class='sunburst'>$ bundle init</pre>
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Then, add the following to your new Gemfile
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<pre class="sunburst">gemspec
</pre>
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<div class='bullet'>
<div class='description'>
Runtime dependencies in your gemspec are treated like base dependencies, and development dependencies are added by default to the group, <code>:development</code>. You can change that group with the <code>:development_group</code> option
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<pre class="sunburst">gemspec <span class="Constant"><span class="Constant">:</span>development_group</span> => <span class="Constant"><span class="Constant">:</span>dev</span>
</pre>
</div>
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<div class='description'>
As well, you can point to a specific gemspec using <code>:path</code>. If your gemspec is in <code>/gemspec/path</code>, use
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<pre class="sunburst">gemspec <span class="Constant"><span class="Constant">:</span>path</span> => <span class="String"><span class="String">'</span>/gemspec/path<span class="String">'</span></span>
</pre>
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<div class='description'>
If you have multiple gemspecs in the same directory, specify which one you'd like to reference using <code>:name</code>
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<pre class="sunburst">gemspec <span class="Constant"><span class="Constant">:</span>name</span> => <span class="String"><span class="String">'</span>my_awesome_gem<span class="String">'</span></span>
</pre>
<div class='notes'>
This will use <code>my_awesome_gem.gemspec</code>
</div>
</div>
<div class='bullet'>
<div class='description'>
That's it! Use bundler when developing your gem, and otherwise, use gemspecs normally!
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<pre class='sunburst'>$ gem build my_gem.gemspec</pre>
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<b><a href="/v1.1/commands.html">commands</a></b>
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<b>usage</b>
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Many thanks to Bundler's <a href="/contributors.html">contributors</a>
and <a href="/sponsors.html">sponsors</a>
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