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content/glyph/book/text_editing/inclusions.html

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<!DOCTYPE html> 
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		<title>Including Files and Snippets &ndash; Glyph Documentation</title> 



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					<hgroup> 
					<h1>Including Files and Snippets</h1> 
					<h2>Glyph Documentation</h2>
					</hgroup> 
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				<section id="body-text" class="hyphenate glyph-book"> 

							<nav><a href="/glyph/book/text_editing/stylesheets.html">Adding Stylesheets &larr;</a><a href="/glyph/book/index.html">Contents</a><a href="/glyph/book/text_editing/evaluation.html">&rarr; Evaluating Ruby code and Configuration Settings</a></nav>
								<p>If you&#8217;re authoring a user manual, a long article, or a book, writing everything inside a single <code>document.glyph</code> file may not be optimal. For this reason, Glyph provides an <a href="/glyph/book/macros/macros_core.html#m_include"><code>include</code></a> macro that can be used to include the contents of any file within the <code>text/</code> directory:</p>
<p><code>include[general/introduction.textile]</code></p>
<p>The macro call above loads the contents of the <code>introduction.textile</code> file, within the <code>text/general</code> directory.</p>
<p>When including a text file, an input filter macro is applied to its contents by default, based on the file extension used:</p>
<ul>
	<li><code>.textile</code> or <code>.txt</code> &rarr; <a href="/glyph/book/macros/macros_filters.html#m_textile"><code>textile</code></a> macro</li>
	<li><code>.markdown</code> or <code>.md</code> &rarr; <a href="/glyph/book/macros/macros_filters.html#m_markdown"><code>markdown</code></a> macro</li>
</ul>
<p>You can override this behavior by setting the <code>filters.by_file_extensions</code> configuration setting to <code>false</code>. If no extension is specified, <code>.glyph</code> is assumed.</p>
<aside class="tip">
<p><span class="note-title">Tip</span>The <a href="/glyph/book/macros/macros_core.html#m_include"><code>include</code></a> macro can also be used to include (and evaluate) ruby files (with a <code>.rb</code> extension). In this case, the ruby file must be placed within the <code>lib/</code> directory of the current project.</p>
</aside>
<p>While including the context of an entire file is definitely a useful feature for content reuse, sometimes it can be an overkill. What if, for example, you just want to reuse a short procedure or even a sentence or a single word? In this case, you may want to consider using a <em>snippet</em> instead.</p>
<p>Snippets are text strings saved in <span class="caps">YAML</span> format in the <code>snippets.yml</code> file. They can be included anywhere in your document using the <a href="/glyph/book/macros/macros_core.html#m_snippet"><code>snippet</code></a> macro (or its alias <code>&amp;</code>).</p>
<aside class="tip">
<p><span class="note-title">Tip</span>Besides storing snippets in the <code>snippets.yml</code> file, you can also define them right in your document, using the <a href="/glyph/book/macros/macros_core.html#m_snippet_"><code>snippet:</code></a> macro.</p>
</aside>
	<aside class="box">
<div class="box-title">Example</div>
<p>Consider the following <code>snippets.yml</code> file:</p>
	<div class="CodeRay">
  <div class="code"><pre><span class="no"> 1</span> <span class="head"><span class="head">---</span></span> 
<span class="no"> 2</span> <span class="sy">:glang</span>: <span class="er">Glyph Language</span>
<span class="no"> 3</span> <span class="sy">:macros</span>: <span class="er">Glyph Macros</span>
<span class="no"> 4</span> <span class="sy">:sq_esc</span>: <span class="er">|-</span>
<span class="no"> 5</span>   <span class="er">Square brackets must be escaped </span>
<span class="no"> 6</span>   <span class="er">unless used as macro delimiters or within a quoting macro.</span>
<span class="no"> 7</span> <span class="sy">:markups</span>: <span class="er">Textile or Markdown</span>
<span class="no"> 8</span> <span class="sy">:test</span>: <span class="er">|-</span>
<span class="no"> 9</span>   <span class="er">This is a </span>
<span class="no"><strong>10</strong></span>   <span class="er">Test snippet</span></pre></div>
</div>

	<p>You can use <code>&amp;[markups]</code> anywhere in your document instead of having to type "Textile or Markdown" every time. Additionally, later on you can change the value of the <code>markups</code> snippet only in the <code>snippets.yml</code> file to change it everywhere else in the document.</p>

</aside> 
	<aside class="tip">
<span class="note-title">Tip</span>Snippets (or any other macro) can be nested within other snippets. Glyph takes care of checking if you nested snippets or macros mutually and warns you as necessary.

</aside>
							<nav><a href="/glyph/book/text_editing/stylesheets.html">Adding Stylesheets &larr;</a><a href="/glyph/book/index.html">Contents</a><a href="/glyph/book/text_editing/evaluation.html">&rarr; Evaluating Ruby code and Configuration Settings</a></nav>
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