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<a name="Update-Processing-1"></a>
<h2 class="chapter">8 Update Processing</h2>

<a name="Detecting"></a>
<h3 class="section">8.1 Detecting</h3>

<p>There are various mechanisms in place for automatically detecting that updates
are available for applications, with the <code>Update Check Mode</code> field in the
metadata determining which method is used for a particular application.
</p>
<p>Running the <code>fdroid checkupdates</code> command will apply this method to each
application in the repository and update the <code>Current Version</code> and
<code>Current Version Code</code> fields in the metadata accordingly.
</p>
<p>As usual, the <code>-p</code> option can be used with this, to restrict processing
to a particular application.
</p>
<p>Note that this only updates the metadata such that we know what the current
published/recommended version is. It doesn&rsquo;t make that version available in
the repository - for that, see the next section.
</p>
<a name="Adding"></a>
<h3 class="section">8.2 Adding</h3>

<p>Adding updates (i.e. new versions of applications already included in the
repository) happens in two ways. The simple case is applications where the
APK files are binaries, retrieved from a developer&rsquo;s published build. In this
case, all that&rsquo;s required is to place the new binary in the <code>Repo</code>
directory, and the next run of <code>fdroid update</code> will pick it up.
</p>
<p>For applications built from source, it is necessary to add a new
<code>Build Version</code> line to the metadata file. At the very least, the version
name, version code and commit will be different. It is also possible that the
additional build flags will change between versions.
</p>
<p>For processing multiple updates in the metadata at once, it can be useful to
run <code>fdroid update --interactive</code>. This will check all the applications
in the repository, and where updates are required you will be prompted to
[E]dit the metadata, [I]gnore the update, or [Q]uit altogether.
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fdroidserver 0.2.1-4 / usr / share / doc / fdroidserver / html / html_node / Update-Processing.html
