content/glyph/book/compiling/programmatic_usage.html
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<h1>Using Glyph programmatically</h1>
<h2>Glyph</h2>
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<nav class="navigation"><a href="/glyph/book/compiling/lite_mode.html">Compiling single Glyph files</a> | <a href="/glyph/book/index.html">Contents</a> | <a href="/glyph/book/stats/stats.html">Using the stats command</a></nav>
<p>Besides using Glyph from the command line, you can also use it straight from your code. Glyph’s public <a href="http://rubydoc.info/gems/glyph"><span class="caps">API</span></a> is simple and can be used to:</p>
<ul>
<li>Retrieve and update configuration settings (using <code>Glyph[]</code> and <code>Glyph[]=</code>)</li>
<li>Filter text to <span class="caps">HTML</span> (using <code>Glyph#filter</code>)</li>
<li>Compile Glyph source files into <span class="caps">HTML</span> or <span class="caps">PDF</span> files (using <code>Glyph#compile</code>)</li>
</ul>
<p>That’s pretty much it. Of course, both the <code>filter</code> and <code>compile</code> method cause Glyph to run in <a href="/glyph/book/compiling/lite_mode.html#lite_mode"><em>lite</em> mode</a>, so the same <a href="/glyph/book/compiling/lite_mode.html#lite_limitations">limitations</a> apply.</p>
<aside class="tip">
<span class="note-title">Tip</span><p>For an example on how to use Glyph programmatically (specifically in conjunction with the <a href="http://nanoc.stoneship.org/">nanoc</a> static site generator), see <a href="http://github.com/h3rald/h3rald">h3rald.com source code</a>, in particular:</p>
<ul>
<li><a href="http://github.com/h3rald/h3rald/blob/master/lib/glyph_filter.rb">lib/glyph_filter.rb</a> — using the <code>Glyph#filter</code> method.</li>
<li><a href="http://github.com/h3rald/h3rald/blob/master/lib/glyph_context.rb">lib/glyph_context.rb</a> — using the <code>Glyph#compile</code> method to generate <span class="caps">PDF</span> files.</li>
</ul>
</aside>
<section class="section">
<header><h1 id="modes">Modes</h1></header>
<p>It is possible to specify some flags (or "modes") to make Glyph behave slightly different than normal, as shown in the following table (by default, none of these is used).</p>
<table>
<tr>
<th>Name</th>
<th>Writer Method</th>
<th>Reader Method</th>
<th>Description</th>
</tr>
<tr>
<td>Test Mode</td>
<td>
<code>Glyph.test_mode=</code>
</td>
<td>
<code>Glyph.test?</code>
</td>
<td>Used internally by the <code>rake spec</code> task to run Glyph's specs.</td>
</tr>
<tr>
<td>Library Mode</td>
<td>
<code>Glyph.library_mode=</code>
</td>
<td>
<code>Glyph.library?</code>
</td>
<td>If enabled, the <a href="/glyph/book/ref_commands.html#c_compile"><code>compile</code></a> command command will raise exceptions instead of printing errors on the screen. Enabled by the <code>Glyph.compile</code> command.</td>
</tr>
<tr>
<td>Debug Mode</td>
<td>
<code>Glyph.debug_mode=</code>
</td>
<td>
<code>Glyph.debug?</code>
</td>
<td>If enabled, additional diagnostic information (such as backtraces or macro values) will be displayed. Enabled by specifying the <a href="/glyph/book/ref_commands.html#debug_switch">debug switch</a> when running a Glyph command.</td>
</tr>
<tr>
<td>Lite Mode</td>
<td>
<code>Glyph.lite_mode=</code>
</td>
<td>
<code>Glyph.lite?</code>
</td>
<td>
<p>Used to compile <a href="/glyph/book/compiling/lite_mode.html#lite_mode">single files</a>. Enabled by:</p>
<ul>
<li>The <code>Glyph.compile</code> and <code>Glyph.filter</code> methods.</li>
<li>The <a href="/glyph/book/ref_commands.html#c_compile"><code>compile</code></a> command, if at least one parameter is supplied.</li>
</ul>
</td>
</tr>
<tr>
<td>Safe Mode</td>
<td>
<code>Glyph.safe_mode=</code>
</td>
<td>
<code>Glyph.safe?</code>
</td>
<td>
<p>If enabled, the following macros cannot be used and will return an error:</p>
<ul>
<li><a href="/glyph/book/macros/macros_core.html#m_ruby"><code>ruby</code></a> macro</li>
<li><a href="/glyph/book/macros/macros_core.html#m_macro_"><code>macro:</code></a> macro</li>
<li><a href="/glyph/book/macros/macros_core.html#m_include"><code>include</code></a> macro</li>
<li><a href="/glyph/book/macros/macros_core.html#m_define_"><code>define:</code></a> macro</li>
<li><a href="/glyph/book/macros/macros_core.html#m_config_"><code>config:</code></a> macro</li>
</ul>
</td>
</tr>
</table>
</section>
<nav class="navigation"><a href="/glyph/book/compiling/lite_mode.html">Compiling single Glyph files</a> | <a href="/glyph/book/index.html">Contents</a> | <a href="/glyph/book/stats/stats.html">Using the stats command</a></nav>
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