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<ol class="chapter"><li class="chapter-item expanded affix "><a href="../index.html">Introduction</a></li><li class="chapter-item expanded affix "><li class="part-title">User Guide</li><li class="chapter-item expanded "><a href="../guide/installation.html"><strong aria-hidden="true">1.</strong> Installation</a></li><li class="chapter-item expanded "><a href="../guide/reading.html"><strong aria-hidden="true">2.</strong> Reading Books</a></li><li class="chapter-item expanded "><a href="../guide/creating.html"><strong aria-hidden="true">3.</strong> Creating a Book</a></li><li class="chapter-item expanded affix "><li class="part-title">Reference Guide</li><li class="chapter-item expanded "><a href="../cli/index.html"><strong aria-hidden="true">4.</strong> Command Line Tool</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../cli/init.html"><strong aria-hidden="true">4.1.</strong> init</a></li><li class="chapter-item expanded "><a href="../cli/build.html"><strong aria-hidden="true">4.2.</strong> build</a></li><li class="chapter-item expanded "><a href="../cli/watch.html"><strong aria-hidden="true">4.3.</strong> watch</a></li><li class="chapter-item expanded "><a href="../cli/serve.html"><strong aria-hidden="true">4.4.</strong> serve</a></li><li class="chapter-item expanded "><a href="../cli/test.html"><strong aria-hidden="true">4.5.</strong> test</a></li><li class="chapter-item expanded "><a href="../cli/clean.html"><strong aria-hidden="true">4.6.</strong> clean</a></li><li class="chapter-item expanded "><a href="../cli/completions.html"><strong aria-hidden="true">4.7.</strong> completions</a></li></ol></li><li class="chapter-item expanded "><a href="../format/index.html"><strong aria-hidden="true">5.</strong> Format</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../format/summary.html"><strong aria-hidden="true">5.1.</strong> SUMMARY.md</a></li><li><ol class="section"><li class="chapter-item expanded "><div><strong aria-hidden="true">5.1.1.</strong> Draft chapter</div></li></ol></li><li class="chapter-item expanded "><a href="../format/configuration/index.html"><strong aria-hidden="true">5.2.</strong> Configuration</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../format/configuration/general.html"><strong aria-hidden="true">5.2.1.</strong> General</a></li><li class="chapter-item expanded "><a href="../format/configuration/preprocessors.html"><strong aria-hidden="true">5.2.2.</strong> Preprocessors</a></li><li class="chapter-item expanded "><a href="../format/configuration/renderers.html"><strong aria-hidden="true">5.2.3.</strong> Renderers</a></li><li class="chapter-item expanded "><a href="../format/configuration/environment-variables.html"><strong aria-hidden="true">5.2.4.</strong> Environment Variables</a></li></ol></li><li class="chapter-item expanded "><a href="../format/theme/index.html"><strong aria-hidden="true">5.3.</strong> Theme</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../format/theme/index-hbs.html"><strong aria-hidden="true">5.3.1.</strong> index.hbs</a></li><li class="chapter-item expanded "><a href="../format/theme/syntax-highlighting.html"><strong aria-hidden="true">5.3.2.</strong> Syntax highlighting</a></li><li class="chapter-item expanded "><a href="../format/theme/editor.html"><strong aria-hidden="true">5.3.3.</strong> Editor</a></li></ol></li><li class="chapter-item expanded "><a href="../format/mathjax.html"><strong aria-hidden="true">5.4.</strong> MathJax Support</a></li><li class="chapter-item expanded "><a href="../format/mdbook.html"><strong aria-hidden="true">5.5.</strong> mdBook-specific features</a></li><li class="chapter-item expanded "><a href="../format/markdown.html"><strong aria-hidden="true">5.6.</strong> Markdown</a></li></ol></li><li class="chapter-item expanded "><a href="../continuous-integration.html"><strong aria-hidden="true">6.</strong> Continuous Integration</a></li><li class="chapter-item expanded "><a href="../for_developers/index.html" class="active"><strong aria-hidden="true">7.</strong> For Developers</a></li><li><ol class="section"><li class="chapter-item expanded "><a href="../for_developers/preprocessors.html"><strong aria-hidden="true">7.1.</strong> Preprocessors</a></li><li class="chapter-item expanded "><a href="../for_developers/backends.html"><strong aria-hidden="true">7.2.</strong> Alternative Backends</a></li><li class="spacer"></li></ol></li><li class="chapter-item expanded "><a href="../misc/contributors.html">Contributors</a></li></ol>
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<h1 id="for-developers"><a class="header" href="#for-developers">For Developers</a></h1>
<p>While <code>mdbook</code> is mainly used as a command line tool, you can also import the
underlying library directly and use that to manage a book. It also has a fairly
flexible plugin mechanism, allowing you to create your own custom tooling and
consumers (often referred to as <em>backends</em>) if you need to do some analysis of
the book or render it in a different format.</p>
<p>The <em>For Developers</em> chapters are here to show you the more advanced usage of
<code>mdbook</code>.</p>
<p>The two main ways a developer can hook into the book's build process is via,</p>
<ul>
<li><a href="preprocessors.html">Preprocessors</a></li>
<li><a href="backends.html">Alternative Backends</a></li>
</ul>
<h2 id="the-build-process"><a class="header" href="#the-build-process">The Build Process</a></h2>
<p>The process of rendering a book project goes through several steps.</p>
<ol>
<li>Load the book
<ul>
<li>Parse the <code>book.toml</code>, falling back to the default <code>Config</code> if it doesn't
exist</li>
<li>Load the book chapters into memory</li>
<li>Discover which preprocessors/backends should be used</li>
</ul>
</li>
<li>For each backend:
<ol>
<li>Run all the preprocessors.</li>
<li>Call the backend to render the processed result.</li>
</ol>
</li>
</ol>
<h2 id="using-mdbook-as-a-library"><a class="header" href="#using-mdbook-as-a-library">Using <code>mdbook</code> as a Library</a></h2>
<p>The <code>mdbook</code> binary is just a wrapper around the <code>mdbook</code> crate, exposing its
functionality as a command-line program. As such it is quite easy to create your
own programs which use <code>mdbook</code> internally, adding your own functionality (e.g.
a custom preprocessor) or tweaking the build process.</p>
<p>The easiest way to find out how to use the <code>mdbook</code> crate is by looking at the
<a href="https://docs.rs/mdbook/*/mdbook/">API Docs</a>. The top level documentation explains how one would use the
<a href="https://docs.rs/mdbook/*/mdbook/book/struct.MDBook.html"><code>MDBook</code></a> type to load and build a book, while the <a href="https://docs.rs/mdbook/*/mdbook/config/index.html">config</a> module gives a good
explanation on the configuration system.</p>
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