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114 lines
3.7 KiB
HTML
114 lines
3.7 KiB
HTML
<!-- Using Mercurial Queues with Codereview -->
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<h2 id="Introduction">Introduction</h2>
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<p>
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The Mercurial Queues extension (<code>mq</code>) provides a mechanism for
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managing patches on top of a Mercurial repository and is described in detail
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in Chapters
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<a href="http://hgbook.red-bean.com/read/managing-change-with-mercurial-queues.html">12</a>
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and <a href="http://hgbook.red-bean.com/read/advanced-uses-of-mercurial-queues.html">13</a>
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of <a href="http://hgbook.red-bean.com/read/">Mercurial: The Definitive Guide</a>.
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This document explains how to use <code>mq</code> in conjunction
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with the <code>codereview</code> Mercurial extension described in the
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instructions for <a href="contribute.html">contributing to the Go project</a>.
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It assumes you have read those instructions.
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</p>
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<h2>Configuration</h2>
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<p>
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To enable <code>mq</code> edit either <code>$HOME/.hgrc</code> (to enable it
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for all of your repositories) or <code>$GOROOT/.hg/hgrc</code> (to enable it for the
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repository at <code>$GOROOT</code>) to add:</p>
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<pre>
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[extensions]
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mq=
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</pre>
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<p>
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Since pulling, pushing, updating and committing while <code>mq</code> patches
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are applied can damage your repository or a remote one, add these lines to
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prevent that case:
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</p>
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<pre>
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[hooks]
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# Prevent "hg pull" if MQ patches are applied.
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prechangegroup.mq-no-pull = ! hg qtop > /dev/null 2>&1
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# Prevent "hg push" if MQ patches are applied.
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preoutgoing.mq-no-push = ! hg qtop > /dev/null 2>&1
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# Prevent "hg update" if MQ patches are applied.
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preupdate.mq-no-update = ! hg qtop > /dev/null 2>&1
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</pre>
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<h2>Making a change</h2>
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<p>
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The entire checked-out tree is writable and you can use <code>mq</code>,
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as documented in Chapter
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<a href="http://hgbook.red-bean.com/read/managing-change-with-mercurial-queues.html">12</a>
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of "The Guide",
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to implement your change as a single patch or a series of patches.
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</p>
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<p>When you are ready to send a change out for review, run</p>
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<pre>
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$ hg change
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</pre>
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<p>from any directory in your Go repository with all of the <code>mq</code> patches relevant to your
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change applied and then proceed as instructed in <a href="contribute.html">contributing
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to the Go project</a>.
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</p>
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<p>
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The change number reported by <code>hg change</code>, preceded by a <code>+</code>,
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can be used as an <code>mq</code> patch guard to assist in controlling which patches
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are applied as described in Chapter
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<a href="http://hgbook.red-bean.com/read/advanced-uses-of-mercurial-queues.html">13</a>
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of "The Guide".
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For example, the command:
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</p>
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<pre>
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for p in $(hg qapplied); do hg qguard $p +99999; done
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</pre>
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<p>
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will apply the guard <code>+99999</code> guard to all currently applied <code>mq</code>
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patches.
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</p>
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<h2>Synchronizing your client</h2>
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<p>While you were working, others might have submitted changes
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to the repository and, as explained in <a href="contribute.html">contributing
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to the Go project</a>, it is necessary to synchronize your repository using
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<code>hg sync</code>before sending your change list for review.
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Because <code>hg sync</code> runs <code>hg pull -u</code>,
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you should not run <code>hg sync</code> while <code>mq</code> patches are
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applied. Instead
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pop all your patches before running <code>hg sync</code> and reapply them after
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it has completed.
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</p>
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<p>
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When reapplying the patches, you may need to resolve conflicts
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as described in <a href="contribute.html">contributing to the Go project</a>.
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</p>
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<h2>Mailing the change for review</h2>
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<p>
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You should have all of the <code>mq</code> patches relevant to your
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change applied when you run <code>hg mail</code>.
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<h2>Submitting the change after the review</h2>
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If you are a committer, you should have all of the <code>mq</code> patches relevant to your
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change applied when you run <code>hg commit</code>.
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