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     <meta name="description" content="">
     <meta name="author" content="Loïc Hoguin based on a design from (Soft10) Pol Cámara">
 
-    <meta name="generator" content="Hugo 0.17" />
+    <meta name="generator" content="Hugo 0.26" />
 
     <title>Nine Nines: Continuous integration</title>
 
@@ -67,13 +67,89 @@
 
 <h1 class="lined-header"><span>Continuous integration</span></h1>
 
-<div class="paragraph"><p>Placeholder chapter.</p></div>

+<div class="paragraph"><p>Erlang.mk comes with some support for continuous integration,
+aimed at open source projects that need to support more than
+one specific Erlang/OTP release. (If you target one specific
+release, check the <a href="../otp_version_pinning">OTP version pinning</a>
+section of the <a href="../kerl">OTP version management</a> chapter.)</p></div>
+<div class="sect1">
+<h2 id="_configuring_erlang_otp_versions_to_test">Configuring Erlang/OTP versions to test</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>To use the CI plugin you must first configure which versions
+of Erlang/OTP will be used. Erlang.mk provides three separate
+configuration variables depending on whether you need a normal
+OTP release, a HiPE-enabled release or an ErLLVM-enabled release.</p></div>
+<div class="paragraph"><p>At the time of writing, this is how you would test against all
+the most recent patch releases of Erlang/OTP 19 and above:</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: #009900">CI_OTP =</span> OTP-19.0.7 OTP-19.1.6 OTP-19.2.3 OTP-19.3.6.2 OTP-20.0.4</tt></pre></div></div>
+<div class="paragraph"><p>If you want to test against HiPE and ErLLVM but only with the
+latest version of Erlang/OTP, the following could work:</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: #009900">CI_HIPE =</span> <span style="color: #009900">$(</span>lastword <span style="color: #009900">$(CI_OTP))</span>
+<span style="color: #009900">CI_ERLLVM =</span> <span style="color: #009900">$(CI_HIPE)</span></tt></pre></div></div>
+<div class="paragraph"><p>Consult the <a href="../kerl">OTP version management</a> chapter for more
+information about Erlang/OTP versions and customization of the
+Erlang/OTP builds.</p></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_running_tests_across_all_configured_versions">Running tests across all configured versions</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The recommended way to run the <code>ci</code> target is with the option
+<code>-k</code>. It will ensure that tests are run for all configured
+Erlang/OTP versions, even if there are errors:</p></div>
+<div class="listingblock">
+<div class="content"><!-- Generator: GNU source-highlight 3.1.8
+by Lorenzo Bettini
+http://www.lorenzobettini.it
+http://www.gnu.org/software/src-highlite -->
+<pre><tt>$ make ci -k</tt></pre></div></div>
+</div>
+</div>
+<div class="sect1">
+<h2 id="_extending_the_ci_targets">Extending the CI targets</h2>
+<div class="sectionbody">
+<div class="paragraph"><p>The <code>ci</code> target can be extended. For example to run Dialyzer
+at the end of CI:</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">ci::</span> dialyze</tt></pre></div></div>
+<div class="paragraph"><p>Additional setup can be done by extending the <code>ci-setup</code>
+target. This target is ran before testing each individual
+Erlang/OTP version.</p></div>
+<div class="paragraph"><p>For example, to ensure dependencies are re-fetched/built
+before testing individual Erlang/OTP releases:</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">ci-setup::</span> distclean</tt></pre></div></div>
+<div class="paragraph"><p>Similarly, the <code>ci-extra</code> target can be extended to run
+extra commands after an Erlang/OTP version has been tested.</p></div>
+</div>
+</div>
 
 
 
 	
 		
 		
+		
+		
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