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  <div class="section" id="api">
<h1>API<a class="headerlink" href="#api" title="Permalink to this headline">¶</a></h1>
<p>hg-review takes Mercurial&#8217;s approach to API stability:</p>
<ul class="simple">
<li>The command line interface is fairly stable and will not break often.</li>
<li>File formats will not change often.</li>
<li>The internal implementation may change frequently &#8211; there are no guarantees
of stability.</li>
</ul>
<p>Providing a stable CLI means that (possibly non-GPL) programs can interact with
hg-review easily without fear of constant breaking.</p>
<p>Stable file formats mean that older versions of hg-review will be able to work
with review data from newer versions (albeit with reduced functionality).</p>
<p><em>Not</em> providing a stable internal implementation allows hg-review&#8217;s code to be
kept clean and elegant. It means that Python programs will needs to use
subprocesses to avoid breaking, but this is a tradeoff that the author feels is
worth making.</p>
<div class="section" id="data-repository-layout">
<h2>Data Repository Layout<a class="headerlink" href="#data-repository-layout" title="Permalink to this headline">¶</a></h2>
<p>The structure of hg-review&#8217;s data repository looks like this:</p>
<div class="highlight-python"><pre>your-project/
|
+-- .hg/
|   |
|   +-- review
|   |   |
|   |   +-- {{ changeset hash }}
|   |   |   |
|   |   |   +-- .exists
|   |   |   |
|   |   |   +-- comments
|   |   |   |   |
|   |   |   |   +-- {{ comment hash }}
|   |   |   |   |
|   |   |   |   `-- other comments...
|   |   |   |
|   |   |   +-- signoffs
|   |   |       |
|   |   |       +-- {{ signoff hash }}
|   |   |       |
|   |   |       `-- other signoffs ...
|   |   |
|   |   `-- other changesets ...
|   |
|   `-- other files ...
|
`-- other files ...</pre>
</div>
<p>All review data for a changeset is stored in:</p>
<div class="highlight-python"><pre>.hg/review/{{ changeset hash }}/</pre>
</div>
<p>A <tt class="docutils literal"><span class="pre">.exists</span></tt> file is included in that directory when code review for
that changeset is initialized. This allows us to check if a given changeset has
been initialized for code review very quickly.</p>
<p>Comments for a changeset are stored in:</p>
<div class="highlight-python"><pre>.hg/review/{{ changeset hash }}/comments/{{ comment hash }}</pre>
</div>
<p>Signoffs for a changeset are stored in:</p>
<div class="highlight-python"><pre>.hg/review/{{ changeset hash }}/signoffs/{{ signoff hash }}</pre>
</div>
</div>
<div class="section" id="file-formats">
<h2>File Formats<a class="headerlink" href="#file-formats" title="Permalink to this headline">¶</a></h2>
<p>hg-review&#8217;s file format is (fairly) stable and is designed to be easily parsed
to enable export to other code review systems.</p>
<p>Comment and signoff files are stored as JSON. The files are indented four
spaces per level to make them more human-readable.</p>
<div class="section" id="exists-files">
<h3><tt class="docutils literal"><span class="pre">.exists</span></tt> Files<a class="headerlink" href="#exists-files" title="Permalink to this headline">¶</a></h3>
<p>The <tt class="docutils literal"><span class="pre">.exists</span></tt> file is always empty. It simply exists to make looking up
whether a given changeset has been initialized faster. It may go away in the
future &#8211; do not depend on it.</p>
</div>
<div class="section" id="comment-files">
<h3>Comment Files<a class="headerlink" href="#comment-files" title="Permalink to this headline">¶</a></h3>
<p>Here is a sample comment file:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="p">{</span>
    <span class="s">&quot;author&quot;</span><span class="p">:</span> <span class="s">&quot;Steve Losh &lt;steve@stevelosh.com&gt;&quot;</span><span class="p">,</span>
    <span class="s">&quot;file&quot;</span><span class="p">:</span> <span class="p">[</span>
        <span class="s">&quot;reykjavi</span><span class="se">\u0301</span><span class="s">k.txt&quot;</span><span class="p">,</span>
        <span class="s">&quot;cmV5YWphdmnMgWsudHh0&quot;</span>
    <span class="p">],</span>
    <span class="s">&quot;hgdate&quot;</span><span class="p">:</span> <span class="s">&quot;Mon Jul 12 23:55:51 2010 -0400&quot;</span><span class="p">,</span>
    <span class="s">&quot;lines&quot;</span><span class="p">:</span> <span class="p">[</span>
        <span class="mi">0</span>
    <span class="p">],</span>
    <span class="s">&quot;message&quot;</span><span class="p">:</span> <span class="s">&quot;Sample.&quot;</span><span class="p">,</span>
    <span class="s">&quot;node&quot;</span><span class="p">:</span> <span class="s">&quot;0e987f91e9b6628b26a30c5d00668a15fae8f22f&quot;</span><span class="p">,</span>
    <span class="s">&quot;style&quot;</span><span class="p">:</span> <span class="s">&quot;markdown&quot;</span>
<span class="p">}</span>
</pre></div>
</div>
<p>Comment files have some or all of the following fields:</p>
<dl class="docutils">
<dt><tt class="docutils literal"><span class="pre">author</span></tt></dt>
<dd>The Mercurial username of the person that added this comment.</dd>
<dt><tt class="docutils literal"><span class="pre">file</span></tt></dt>
<dd>A list of two strings. The first string is a (JSON-encoded) representation
of the UTF-8 filename. The second string is a base64 encoded version of the
actual bytes of the filename (which is what Mercurial gives and expects to
receive internally). If this is a review-level comment both strings will be
blank.</dd>
<dt><tt class="docutils literal"><span class="pre">hgdate</span></tt></dt>
<dd>The date and time the comment was added (or last edited).</dd>
<dt><tt class="docutils literal"><span class="pre">lines</span></tt></dt>
<dd>A list of integers representing the lines of the file that this comment
applies to. If this is a file-level or review-level comment the list will
be empty.</dd>
<dt><tt class="docutils literal"><span class="pre">message</span></tt></dt>
<dd>A string representing the raw comment message.</dd>
<dt><tt class="docutils literal"><span class="pre">node</span></tt></dt>
<dd>A string representing the hash of the changset this comment belongs to, for
easy lookup later.</dd>
<dt><tt class="docutils literal"><span class="pre">style</span></tt></dt>
<dd>A string representing the style of this comment &#8211; this will be
<tt class="docutils literal"><span class="pre">markdown</span></tt> for Markdown comments and blank for plain-text comments. More
styles may be added in the future.</dd>
</dl>
</div>
<div class="section" id="signoff-files">
<h3>Signoff Files<a class="headerlink" href="#signoff-files" title="Permalink to this headline">¶</a></h3>
<p>Here is a sample signoff file:</p>
<div class="highlight-python"><div class="highlight"><pre><span class="p">{</span>
    <span class="s">&quot;author&quot;</span><span class="p">:</span> <span class="s">&quot;Steve Losh &lt;steve@stevelosh.com&gt;&quot;</span><span class="p">,</span>
    <span class="s">&quot;hgdate&quot;</span><span class="p">:</span> <span class="s">&quot;Tue Jul 13 00:16:00 2010 -0400&quot;</span><span class="p">,</span>
    <span class="s">&quot;message&quot;</span><span class="p">:</span> <span class="s">&quot;Sample.&quot;</span><span class="p">,</span>
    <span class="s">&quot;node&quot;</span><span class="p">:</span> <span class="s">&quot;0e987f91e9b6628b26a30c5d00668a15fae8f22f&quot;</span><span class="p">,</span>
    <span class="s">&quot;opinion&quot;</span><span class="p">:</span> <span class="s">&quot;yes&quot;</span><span class="p">,</span>
    <span class="s">&quot;style&quot;</span><span class="p">:</span> <span class="s">&quot;markdown&quot;</span>
<span class="p">}</span>
</pre></div>
</div>
<p>Signoff files have some or all of the following fields:</p>
<dl class="docutils">
<dt><tt class="docutils literal"><span class="pre">author</span></tt></dt>
<dd>The Mercurial username of the person that added this comment.</dd>
<dt><tt class="docutils literal"><span class="pre">hgdate</span></tt></dt>
<dd>The date and time the comment was added (or last edited).</dd>
<dt><tt class="docutils literal"><span class="pre">message</span></tt></dt>
<dd>A string representing the raw comment message.</dd>
<dt><tt class="docutils literal"><span class="pre">node</span></tt></dt>
<dd>A string representing the hash of the changset this comment belongs to, for
easy lookup later.</dd>
<dt><tt class="docutils literal"><span class="pre">opinion</span></tt></dt>
<dd>A string representing the signoff opinion. This will be <tt class="docutils literal"><span class="pre">yes</span></tt>, <tt class="docutils literal"><span class="pre">no</span></tt>, or
a blank string (for a neutral signoff).</dd>
<dt><tt class="docutils literal"><span class="pre">style</span></tt></dt>
<dd>A string representing the style of this comment &#8211; this will be
<tt class="docutils literal"><span class="pre">markdown</span></tt> for Markdown comments and blank for plain-text comments. More
styles may be added in the future.</dd>
</dl>
</div>
</div>
<div class="section" id="command-line-interface">
<h2>Command Line Interface<a class="headerlink" href="#command-line-interface" title="Permalink to this headline">¶</a></h2>
<p>hg-review&#8217;s command line interface is (fairly) stable. If you want to interact
with review data for a repository this is the safest method to use.</p>
<p>See the <a class="reference external" href="cli.html"><em>command line interface documentation</em></a> for more details.</p>
</div>
<div class="section" id="internal-python-api">
<h2>Internal Python API<a class="headerlink" href="#internal-python-api" title="Permalink to this headline">¶</a></h2>
<p>hg-review&#8217;s internal Python implementation is <em>not</em> stable. It may change at
any time. Relying on it virtually guarantees your application will break at
some point.</p>
<p>For a more stable API you should use the command line interface.</p>
<p>The Python API will be documented later, but is not a high priority at the
moment because of its volatility.</p>
</div>
</div>


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            <h3><a href="index.html">Table Of Contents</a></h3>
            <ul>
<li><a class="reference external" href="#">API</a><ul>
<li><a class="reference external" href="#data-repository-layout">Data Repository Layout</a></li>
<li><a class="reference external" href="#file-formats">File Formats</a><ul>
<li><a class="reference external" href="#exists-files"><tt class="docutils literal"><span class="pre">.exists</span></tt> Files</a></li>
<li><a class="reference external" href="#comment-files">Comment Files</a></li>
<li><a class="reference external" href="#signoff-files">Signoff Files</a></li>
</ul>
</li>
<li><a class="reference external" href="#command-line-interface">Command Line Interface</a></li>
<li><a class="reference external" href="#internal-python-api">Internal Python API</a></li>
</ul>
</li>
</ul>

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author	Steve Losh <steve@stevelosh.com>
date	Wed, 21 Jun 2023 15:21:12 -0400
parents	1d1ba7d1338d
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