---
title: Mercurial
slug: Mercurial
translation_of: Mozilla/Mercurial
---
<p><a class="external" href="http://mercurial.selenic.com/"><strong>Mercurial</strong></a> (also known as "hg"), is the <a class="external" href="https://en.wikipedia.org/wiki/Distributed_revision_control">distributed version control</a> software used for the development of Firefox, Thunderbird, and the shared Gecko core. It replaced <a href="/en-US/docs/Developer_Guide/Source_Code/CVS" title="en-US/docs/Developer_Guide/Source_Code/CVS">CVS</a> after Mozilla 1.9 was branched.</p>

<p><strong><code>hg</code></strong> is the Mercurial command-line tool, Hg being the chemical symbol for the element mercury.</p>

<h2 id="Learning_to_use_Mercurial" name="Learning_to_use_Mercurial">Installation, configuration, and getting the source</h2>

<p>See <a href="/en-US/docs/Installing_Mercurial" title="/en-US/docs/Installing_Mercurial">Installing Mercurial</a> for installation and configuration tips.</p>

<p>See <a href="/en-US/docs/Developer_Guide/Source_Code/Mercurial" title="en-US/docs/Developer_Guide/Source_Code/Mercurial">Getting Mozilla Source Code Using Mercurial</a> for getting a tree to build.</p>

<h2 id="Learning_to_use_Mercurial" name="Learning_to_use_Mercurial">Learning to use Mercurial</h2>

<p>If you are new to Mercurial, you should start with the <a href="http://mercurial.selenic.com/guide">official guide</a>.</p>

<p>Then, move on to <a href="/en-US/docs/Mercurial_basics" title="en-US/docs/Mercurial_basics">Mercurial basics</a> and <a href="/en-US/docs/Mercurial_FAQ" title="en-US/docs/Mercurial_FAQ">Mercurial FAQ</a> and the <a href="https://mozilla-version-control-tools.readthedocs.org/en/latest/hgmozilla/">version control tool docs</a> for Mozilla-centric Mercurial information.</p>

<h2 id="Further_reading" name="Further_reading">Further reading</h2>

<p>See <a href="/en-US/docs/Mercurial_Queues" title="en-US/docs/Mercurial_Queues">Mercurial Queues</a> for managing queues of patches, and how to integrate Mercurial with Bugzilla.</p>

<p>The <a href="https://developer.mozilla.org/en-US/docs/tag/Mercurial" title="https://developer.mozilla.org/en-US/docs/tag/Mercurial">Mercurial tag</a> lists the Mercurial-related articles on MDN.</p>

<p>And on wiki.mozilla.org, these helpful pages:</p>

<ul>
 <li>{{ interwiki('wikimo', 'Using_Mercurial_locally_with_CVS', 'Using Mercurial locally with CVS') }}, a how-to. (Note that this is only useful for code that's still exclusively in CVS.)</li>
 <li>{{ interwiki('wikimo', 'Mercurial_on_Windows', 'Mercurial on Windows') }}</li>
 <li><a href="/en-US/docs/Creating_Mercurial_User_Repositories" title="en-US/docs/Creating_Mercurial_User_Repositories">Creating Mercurial User Repositories</a> - If you have a LDAP account that allows you to push to hg.mozilla.org you can also create your own user repositories on the server to share work.</li>
</ul>

<p>{{ languages( { "es": "es/Mercurial", "fr": "fr/Mercurial", "ja": "ja/Mercurial" } ) }}</p>