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    <title>Nine Nines: Self-extracting releases</title>

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<h1 class="lined-header"><span>Self-extracting releases</span></h1>

<div class="paragraph"><p>Erlang.mk allows you to package <a href="../relx">Relx releases</a> as
self-extracting archives. These archives contain all the
files in the release and come in the form of a script that
will extract and run the release automatically.</p></div>
<div class="paragraph"><p>This allows you to package the release as a single file
that can then be executed.</p></div>
<div class="paragraph"><p>This feature is currently experimental. Feedback is much
appreciated.</p></div>
<div class="sect1">
<h2 id="_generating_the_self_extracting_archive">Generating the self-extracting archive</h2>
<div class="sectionbody">
<div class="paragraph"><p>To generate a self-extracting release, all you need to do
is pass the <code>SFX=1</code> variable to Make when you build the
release:</p></div>
<div class="listingblock">
<div class="content"><!-- Generator: GNU source-highlight 3.1.8
by Lorenzo Bettini
http://www.lorenzobettini.it
http://www.gnu.org/software/src-highlite -->
<pre><tt>$ make <span style="color: #009900">SFX</span><span style="color: #990000">=</span><span style="color: #993399">1</span></tt></pre></div></div>
<div class="paragraph"><p>This will create a self-extracting archive in
<code>$RELX_OUTPUT_DIR/&lt;name&gt;.run</code>. For example if the release
is named <code>hello_world</code> and <code>$RELX_OUTPUT_DIR</code> is the default,
the file will be located at <code>_rel/hello_world.run</code>.</p></div>
</div>
</div>
<div class="sect1">
<h2 id="_running_the_release">Running the release</h2>
<div class="sectionbody">
<div class="paragraph"><p>Simply execute the script to get started:</p></div>
<div class="listingblock">
<div class="content"><!-- Generator: GNU source-highlight 3.1.8
by Lorenzo Bettini
http://www.lorenzobettini.it
http://www.gnu.org/software/src-highlite -->
<pre><tt>$ <span style="color: #990000">./</span>_rel/hello_world<span style="color: #990000">.</span>run
Exec<span style="color: #990000">:</span> /tmp/tmp<span style="color: #990000">.</span>3eeEq7E1ta/erts-<span style="color: #993399">8.1</span>/bin/erlexec <span style="color: #990000">...</span>
Root<span style="color: #990000">:</span> /tmp/tmp<span style="color: #990000">.</span>3eeEq7E1ta
/tmp/tmp<span style="color: #990000">.</span>3eeEq7E1ta
Erlang/OTP <span style="color: #993399">19</span> <span style="color: #990000">[</span>erts-<span style="color: #993399">8.1</span><span style="color: #990000">]</span> <span style="color: #990000">[</span><span style="font-weight: bold"><span style="color: #0000FF">source</span></span><span style="color: #990000">]</span> <span style="color: #990000">[</span><span style="color: #993399">64</span>-bit<span style="color: #990000">]</span> <span style="color: #990000">[</span>smp<span style="color: #990000">:</span><span style="color: #993399">4</span><span style="color: #990000">:</span><span style="color: #993399">4</span><span style="color: #990000">]</span> <span style="color: #990000">...</span>

Eshell V8<span style="color: #990000">.</span><span style="color: #993399">1</span>  <span style="color: #990000">(</span>abort with <span style="color: #990000">^</span>G<span style="color: #990000">)</span>
<span style="color: #990000">(</span>hello_world@localhost<span style="color: #990000">)</span><span style="color: #993399">1</span><span style="color: #990000">&gt;</span></tt></pre></div></div>
<div class="paragraph"><p>As you can see the archive is extracted to a temporary
directory before the release can be started.</p></div>
<div class="paragraph"><p>The self-extracting script currently only supports starting
the release in <code>console</code> mode.</p></div>
</div>
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