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</head>
<body class="book toc2 toc-left">
<div id="header">
<div id="toc" class="toc2">
<div id="toctitle">Table of Contents</div>
<ul class="sectlevel2">
<li><a href="#configuration">Configuration</a></li>
</ul>
</div>
</div>
<div id="content">
<div class="sect2">
<h3 id="configuration">Configuration</h3>
<div class="paragraph">
<p>Asset-Pipeline has several customizable options to tweak the compiler to suit your needs. Below is a list of the various configuration options and explanations for how to use them.</p>
</div>
<div class="sect3">
<h4 id="excludes-and-includes">Excludes and Includes</h4>
<div class="paragraph">
<p>Certain files are not needed for compilation in production. This can be configured globally or for a specific plugin by using the provided configuration options:</p>
</div>
<table class="tableblock frame-all grid-all spread">
<caption class="title">Table 1. Table Exclude Properties</caption>
<colgroup>
<col style="width: 50%;">
<col style="width: 50%;">
</colgroup>
<tbody>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">Property</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Value</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">grails.assets.excludes</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">["tiny_mce/src/\*.js"]</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">grails.assets.plugin."twitter-bootstrap".excludes</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">["*\*/\*.less"]</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">grails.assets.plugin."twitter-bootstrap".includes</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">["bootstrap.less"]</p></td>
</tr>
</tbody>
</table>
<div class="paragraph">
<p>Above you will notice the use of an includes. An includes allows you to override a specific file after the excludes scan has already been performed. The above example makes sure the @bootstrap.less@ file can be compiled from the @twitter-bootstrap plugin@.</p>
</div>
</div>
<div class="sect3">
<h4 id="minification">Minification</h4>
<div class="paragraph">
<p>The Asset-pipeline comes with the newer version of Closure Compiler to minify your JavaScript assets. This is great for compression and a few options are provided to tune the minifier. Closure can be enabled/disabled entirely as well as configured via various options.</p>
</div>
<table class="tableblock frame-all grid-all spread">
<caption class="title">Table 2. Table Build Options</caption>
<colgroup>
<col style="width: 33%;">
<col style="width: 33%;">
<col style="width: 33%;">
</colgroup>
<tbody>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">Property</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Value</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Default</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">grails.assets.minifyJs</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock"><strong>true</strong> or <strong>false</strong></p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock"><strong>true</strong></p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">grails.assets.minifyCss</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock"><strong>true</strong> or <strong>false</strong></p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock"><strong>true</strong></p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">grails.assets.enableSourceMaps</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock"><strong>true</strong> or <strong>false</strong></p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock"><strong>true</strong></p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">grails.assets.minifyOptions</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock"><strong>Map</strong></p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">(see below)</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock">grails.assets.skipNonDigests</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock"><strong>true</strong> or <strong>false</strong></p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock"><strong>true</strong></p></td>
</tr>
</tbody>
</table>
<div class="admonitionblock note">
<table>
<tr>
<td class="icon">
<div class="title">Note</div>
</td>
<td class="content">
It is normally not necessary to turn off 'skipNonDigests'. Tomcat will automatically still serve files by non digest name and will copy them out using storagePath via the <code>manifest.properties</code> alias map.
This simply cuts storage in half. However, if you are attempting to do things like upload to a cdn outside of the cdn-asset-pipeline plugin and via the contents of 'target/assets'. This may still be useful.
</td>
</tr>
</table>
</div>
<div class="listingblock">
<div class="content">
<pre class="CodeRay highlight"><code data-lang="groovy">grails.assets.minifyOptions = [
    <span class="key">languageMode</span>: <span class="string"><span class="delimiter">'</span><span class="content">ES5</span><span class="delimiter">'</span></span>,
    <span class="key">targetLanguage</span>: <span class="string"><span class="delimiter">'</span><span class="content">ES5</span><span class="delimiter">'</span></span>, <span class="comment">//Can go from ES6 to ES5 for those bleeding edgers</span>
    <span class="key">optimizationLevel</span>: <span class="string"><span class="delimiter">'</span><span class="content">SIMPLE</span><span class="delimiter">'</span></span> <span class="comment">//Or ADVANCED or WHITESPACE_ONLY</span>
]</code></pre>
</div>
</div>
<div class="paragraph">
<p>Above are the default values for the majority of Closure Compiler. For specifics on what these options do please refer to the documentation for Closure Compiler.</p>
</div>
</div>
<div class="sect3">
<h4 id="mappings-and-asset-taglib-urls">Mappings and Asset Taglib URLs</h4>
<div class="paragraph">
<p>In many cases you may want to change the URL for which to include your static assets. This can be useful when using a CDN or perhaps even using nginx to serve your static assets.</p>
</div>
<div class="paragraph">
<p>To change the URL for your taglibs use the following configuration option:</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="CodeRay highlight"><code data-lang="groovy">grails.assets.url = <span class="string"><span class="delimiter">&quot;</span><span class="content">http://cdn.example.com/</span><span class="delimiter">&quot;</span></span></code></pre>
</div>
</div>
<div class="paragraph">
<p>Now your files are going to reference the CDN when running in the production environment. To go with this feature, you can have your application automatically copy your asset files out of your base WAR file on startup of your application. Optionally the asset URL config can also be defined as a closure that takes a request argument.</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="CodeRay highlight"><code data-lang="groovy">grails.assets.url = { request -&gt;
        <span class="keyword">if</span>(request.isSecure()) {
                <span class="keyword">return</span> <span class="string"><span class="delimiter">&quot;</span><span class="content">https://cdn.example.com/</span><span class="delimiter">&quot;</span></span>
        } <span class="keyword">else</span> {
                <span class="keyword">return</span> <span class="string"><span class="delimiter">&quot;</span><span class="content">http://cdn.example.com/</span><span class="delimiter">&quot;</span></span>
        }
}</code></pre>
</div>
</div>
<div class="paragraph">
<p>This allows more fine grained control of your asset URLs based on the incoming request. An example, might be SSL detection or even changing CDN region by source IP.</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="CodeRay highlight"><code data-lang="groovy">grails.assets.storagePath = <span class="string"><span class="delimiter">&quot;</span><span class="content">/var/cdn/path</span><span class="delimiter">&quot;</span></span></code></pre>
</div>
</div>
<div class="paragraph">
<p>You can also change the default Tomcat path for both debugging and file inclusion using the <code>mapping</code> config option.</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="CodeRay highlight"><code data-lang="groovy">grails.assets.mapping = <span class="string"><span class="delimiter">'</span><span class="content">assets</span><span class="delimiter">'</span></span></code></pre>
</div>
</div>
<div class="paragraph">
<p>For all these configuration options, you will want to put these config values in the appropriate environment in <code>Config.groovy</code>.</p>
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Last updated 2018-07-28 13:31:51 -04:00
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