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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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<h1>What's New in each Release</h1>
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<a href="/v1.6/whats_new.html#version16">Latest Version v1.6</a>
<a href="/v1.5/whats_new.html#version15">v1.5</a>
<a href="/v1.3/whats_new.html#version13">v1.3</a>
<a href="/v1.2/whats_new.html#version12">v1.2</a>
<a href="https://github.com/bundler/bundler/blob/master/CHANGELOG.md#110-mar-7-2012">v1.1</a>
<a href="https://github.com/bundler/bundler/blob/master/CHANGELOG.md#100-august-29-2010">v1.0</a>
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<h2 id='version12'>What's New in v1.2</h2>
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In this section, you'll find the major features introduced in the release. All the changes are documented in the Bundler 1.2 CHANGELOG.
<a href="https://github.com/bundler/bundler/blob/1-2-stable/CHANGELOG.md">CHANGELOG</a>
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<h2 id='ruby-directive'>Specifying a Ruby Version</h2>
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You can now specify the version of Ruby in the <code>Gemfile</code> like the following:
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<pre class="highlight ruby"><span class="n">ruby</span> <span class="s1">'1.9.3'</span>
</pre>
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That line declares that this application has a dependency on the Ruby VM that is ABI-compatible with 1.9.3. If the version check does not match, Bundler will raise an exception. This will ensure the running code matches. You can be more specific with the <code>:engine</code> and <code>:engine_version</code> options.
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<pre class="highlight ruby"><span class="n">ruby</span> <span class="s1">'1.9.3'</span><span class="p">,</span> <span class="ss">:engine</span> <span class="o">=></span> <span class="s1">'jruby'</span><span class="p">,</span> <span class="ss">:engine_version</span> <span class="o">=></span> <span class="s1">'1.6.7'</span></pre>
<a href="/v1.2/gemfile_ruby.html">Learn More: Ruby Directive</a>
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<h2 id='package-git-and-path-dependencies'>Package <code>:git</code> and <code>:path</code> Dependencies</h2>
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The <code>bundle package</code> command can also package <code>:git</code> and
<code>:path</code> dependencies besides <code>.gem</code> files. This needs to be explicitly enabled
via the <code>--all</code> option. Once used, the <code>--all</code> option will be remembered.
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<a href="/v1.2/bundle_package.html">Learn More: bundle pack</a>
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</div>
<h2 id='local-git-repos'>Local Git Repos</h2>
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<div class='description'>
Now when developing against a remote git repository, you can use a local
git repo and keep the remote version for deployment. You can do this by
setting a local git override:
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<pre class="highlight plaintext">bundle config local.GEM_NAME /path/to/local/git/repository
</pre>
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<div class='bullet'>
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For example, in order to use a local Rack repository, a developer could call:
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<pre class="highlight plaintext">bundle config local.rack ~/Work/git/rack</pre>
<div class='description'>
and in your <code>Gemfile</code> you would set:
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<pre class="highlight ruby"><span class="n">gem</span> <span class="s1">'rack'</span><span class="p">,</span> <span class="ss">:github</span> <span class="o">=></span> <span class="s1">'rack/rack'</span><span class="p">,</span> <span class="ss">:branch</span> <span class="o">=></span> <span class="s1">'master'</span></pre>
<div class='description'>
You'll need to reference a git branch, since Bundler will do checks to
ensure you don't work with invalid references. If the branch specified in
the <code>Gemfile</code> and the current branch in the local git
repository do not match, Bundler will abort. This ensures that a
developer is always working against the correct branches, and prevents
accidental locking to a different branch.
</div>
<a href="/v1.2/git.html#local">Learn More: Git</a>
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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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<a href="/v1.0/">v1.0</a>
<a href="/v1.1/">v1.1</a>
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