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content/glyph/book/extending/output_format.html

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<!DOCTYPE html> 
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		<title>Custom Output Formats &ndash; Glyph Documentation</title> 



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					/<a href="/glyph/" rel="archives">GLYPH</a> 
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				<header> 
					<hgroup> 
					<h1>Custom Output Formats</h1> 
					<h2>Glyph Documentation</h2>
					</hgroup> 
				</header> 
				<section id="body-text" class="hyphenate glyph-book"> 

							<nav><a href="/glyph/book/extending/task.html">Defining Custom Tasks &larr;</a><a href="/glyph/book/index.html">Contents</a><a href="/glyph/book/extending/command.html">&rarr; Defining Custom Commands</a></nav>
							<p>As shown in <a href="/glyph/book/extending/commands_tasks.html#cmd_tasks_arch">How Commands and Tasks work</a>, the <a href="/glyph/book/ref_commands.html#c_compile"><code>compile</code></a> command command calls specific tasks defined in the <code>generate:</code> Rake namespace to generate output files in a particular format.</p>
<p>More specifically, when a <code>--format</code> option is specified, the command looks for a task with the same name within the <code>generate:</code> namespace. This makes adding new output formats to Glyph a fairly easy task, without the need to specify custom commands or similar.</p>
<p>The following sections explain how the <code>h3rald</code> output format was created to integrate this book into the <a href="http://www.h3rald.com">H3RALD.com</a> website.</p>
<section class="section">
<header><h1 id="h_93">Output Configuration</h1></header>
<p>The first step required to add a new output format to Glyph is extending Glyph&#8217;s configuration by adding the appropriate output hash, as follows:</p>
	<div class="CodeRay">
  <div class="code"><pre><span class="no"> 1</span> <span class="sy">:output</span>: 
<span class="no"> 2</span>   <span class="sy">:h3rald</span>: 
<span class="no"> 3</span>     <span class="sy">:multifile</span>: <span class="er">true</span>
<span class="no"> 4</span>     <span class="sy">:extension</span>: <span class="er">'.html'</span>
<span class="no"> 5</span>     <span class="sy">:filter_target</span>: <span class="er">'html'</span>
<span class="no"> 6</span>     <span class="sy">:base</span>: <span class="er">'/glyph/book/'</span>
<span class="no"> 7</span>     <span class="sy">:macro_dirs</span>: [<span class="er">'html', 'html5']</span>
<span class="no"> 8</span>     <span class="sy">:layout_dirs</span>: [<span class="er">'web5']</span>
<span class="no"> 9</span>     <span class="sy">:layouts</span>: 
<span class="no"><strong>10</strong></span>       <span class="sy">:topic</span>: <span class="er">bookpage</span>
<span class="no">11</span>       <span class="sy">:index</span>: <span class="er">bookindex</span></pre></div>
</div>

	<p>In particular, the following keys are mandatory:</p>
<ul>
	<li>multifile</li>
	<li>extension</li>
	<li>filter_target</li>
	<li>base</li>
	<li>macro_dirs</li>
	<li>layout_dirs</li>
</ul>

</section>
<section class="section">
<header><h1 id="h_94">Creating a 'generate:h3rald' task</h1></header>
<p>The next (and final) step involves creating a custom <code>h3rald</code> task within the <code>generate:</code> namespace. This task can be placed in any <code>.rake</code> file within the <code>lib/tasks</code> directory:</p>
	<div class="CodeRay">
  <div class="code"><pre><span class="no"> 1</span> namespace <span class="sy">:generate</span> <span class="r">do</span>
<span class="no"> 2</span>   desc <span class="s"><span class="dl">&quot;</span><span class="k">Create output for h3rald.com integration</span><span class="dl">&quot;</span></span>
<span class="no"> 3</span>   task <span class="sy">:h3rald</span> =&gt; [<span class="sy">:web5</span>] <span class="r">do</span>
<span class="no"> 4</span>     dir = <span class="co">Glyph</span>::<span class="co">PROJECT</span>/<span class="s"><span class="dl">'</span><span class="k">output/h3rald</span><span class="dl">'</span></span>
<span class="no"> 5</span>     (dir/<span class="s"><span class="dl">&quot;</span><span class="k">glyph/book</span><span class="dl">&quot;</span></span>).mkpath
<span class="no"> 6</span>     <span class="c"># Copy files in subdir</span>
<span class="no"> 7</span>     (dir).find <span class="r">do</span> |i|
<span class="no"> 8</span>       <span class="r">if</span> i.file? <span class="r">then</span>
<span class="no"> 9</span>         <span class="r">next</span> <span class="r">if</span> i.to_s.match(<span class="co">Regexp</span>.escape(dir/<span class="s"><span class="dl">'</span><span class="k">glyph</span><span class="dl">'</span></span>)) 
<span class="no"><strong>10</strong></span>         dest = dir/<span class="s"><span class="dl">&quot;</span><span class="k">glyph/book/</span><span class="il"><span class="idl">#{</span>i.relative_path_from(<span class="co">Glyph</span>::<span class="co">PROJECT</span>/dir)<span class="idl">}</span></span><span class="dl">&quot;</span></span>
<span class="no">11</span>         src = i.to_s
<span class="no">12</span>         <span class="co">Pathname</span>.new(dest).parent.mkpath
<span class="no">13</span>         file_copy src, dest
<span class="no">14</span>       <span class="r">end</span>
<span class="no">15</span>     <span class="r">end</span>
<span class="no">16</span>     <span class="c"># Remove files from output dir</span>
<span class="no">17</span>     dir.children.each <span class="r">do</span> |c|
<span class="no">18</span>       <span class="r">unless</span> c == dir/<span class="s"><span class="dl">'</span><span class="k">glyph</span><span class="dl">'</span></span> <span class="r">then</span>
<span class="no">19</span>         c.directory? ? c.rmtree : c.unlink
<span class="no"><strong>20</strong></span>       <span class="r">end</span>
<span class="no">21</span>     <span class="r">end</span>
<span class="no">22</span>     (dir/<span class="s"><span class="dl">'</span><span class="k">glyph/book/images/glyph/glyph.eps</span><span class="dl">'</span></span>).unlink 
<span class="no">23</span>     (dir/<span class="s"><span class="dl">'</span><span class="k">glyph/book/images/glyph/glyph.svg</span><span class="dl">'</span></span>).unlink
<span class="no">24</span>     <span class="c"># Create project page</span>
<span class="no">25</span>     project = <span class="co">Glyph</span>.filter <span class="s"><span class="dl">%{</span><span class="k">layout:project[
<span class="no">26</span>         @contents[</span><span class="il"><span class="idl">#{</span>file_load(<span class="co">Glyph</span>::<span class="co">PROJECT</span>/<span class="s"><span class="dl">'</span><span class="k">text/introduction.glyph</span><span class="dl">'</span></span>)<span class="idl">}</span></span><span class="k">]
<span class="no">27</span>       ]</span><span class="dl">}</span></span>
<span class="no">28</span>     file_write dir/<span class="s"><span class="dl">&quot;</span><span class="k">glyph.textile</span><span class="dl">&quot;</span></span>, project
<span class="no">29</span>   <span class="r">end</span>  
<span class="no"><strong>30</strong></span> <span class="r">end</span></pre></div>
</div>

	<p>In this case, this task does not actually renders files in a different format, it just moves the files generated by the @generate:web5@ task in different subdirectories.</p>
	<p>Additionally, it also generates the <a href="http://www.h3rald.com/glyph/">Glyph project page</a> from the book's introduction (note the usage of a raw custom layout macro).</p>

</section>
							<nav><a href="/glyph/book/extending/task.html">Defining Custom Tasks &larr;</a><a href="/glyph/book/index.html">Contents</a><a href="/glyph/book/extending/command.html">&rarr; Defining Custom Commands</a></nav>
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