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<!DOCTYPE html> <html lang="en"> <head> <title>Defining Custom Commands and Tasks - Glyph</title> <link href='http://fonts.googleapis.com/css?family=Crimson+Text:400,400italic,600,600italic,700,700italic' rel='stylesheet' type='text/css'> <meta charset="utf-8" /> <meta name="author" content="Fabio Cevasco" /> <meta name="copyright" content="Fabio Cevasco" /> <meta name="robots" content="all, follow" /> <meta name="Revisit-After" content="2 Days" /> <meta name="language" content="en" /> <meta name="target_country" content="en-us" /> <meta name="country" content="United States" /> <meta name="readability-verification" content="XmaVzRjmcFL5Bb2Fu9TZVdDKzhA3apQdxexTB2rK"/> <meta name="description" content="H3RALD - Fabio Cevasco's Web Site" /> <meta name="keywords" content="h3rald, fabio cevasco, glyph" /> <link rel="shortcut icon" href="/favicon.png" type="image/png" /> <meta content="44.388041;9.073248" name="ICBM" /> <link rel="stylesheet" type="text/css" href="/styles/html5reset.css" /> <link rel="stylesheet" type="text/css" href="/styles/style.css" /> <script src="http://www.google.com/jsapi?key=ABQIAAAAr6RY1Z6dchG_sX9WDLSy3xRlq2n1sm52B5HDRR5tm6o8XM18FhR56xHNNH6CsX86uN5VoTrglpyOyQ" type="text/javascript"></script> <script src="/js/sevenup.js" type="text/javascript"></script> <script src="/js/sevenup_black.js" type="text/javascript"></script> <script type="text/javascript">google.load("jquery", "1");</script> <script src="/js/jquery-timeago.js" type="text/javascript"></script> <script src="/js/jquery-easing.js" type="text/javascript"></script> <script src="/js/jquery-fancybox.js" type="text/javascript"></script> <script src="/js/date.js" type="text/javascript"></script> <script src="/js/feeds.js" type="text/javascript"></script> <script src="/js/hyphenator.js" type="text/javascript"></script> <script src="/js/init.js" type="text/javascript"></script> <script src="/js/search.js" type="text/javascript"></script> </head> <body> <section id="container"> <header class="page"> <nav class="home-link"> <a href="/"> <img src="/images/h3rald_small.png" alt="H3RALD" class="default"/> <![if !IE]> <img src="/images/h3rald_hover_small.png" alt="H3RALD" class="hover"/> <![endif]> </a> </nav> <nav class="section"> /<a href="/glyph/" rel="glyph">GLYPH</a> </nav> </header> <article class="page glyph-book"> <header> <hgroup> <h1>Defining Custom Commands and Tasks</h1> <h2>Glyph</h2> </hgroup> </header> <section id="body-text" class="hyphenate glyph-book"> <nav class="navigation"><a href="/glyph/book/extending/further_reading.html">Further Reading</a> | <a href="/glyph/book/index.html">Contents</a> | <a href="/glyph/book/extending/task.html">Defining Custom Tasks</a></nav> <p>In most cases, you can extend Glyph just by creating your own <a href="/glyph/book/extending/macro_def.html#macro_def">custom macros</a>. In some cases though, you may want to further customize Glyph to fit the needs of your project, in terms of creating <a href="/glyph/book/extending/command.html#custom_command">custom commands</a> and <a href="/glyph/book/extending/task.html#custom_task">custom tasks</a>.</p> <p>Glyph’s modular architecture (and the Ruby language itself) lets you to add <em>arbitrary</em> functionality to its core, simply by creating a few Ruby files and putting them in the right places.</p> <section class="section"> <header><h1 id="cmd_tasks_arch">How Commands and Tasks work</h1></header> <p>Before creating custom Glyph commands and tasks, you should have a basic understanding on how they work, and which commands — or better, which tasks — are already available.</p> <p>The following diagram outlines the relationships between the default commands and some tasks:</p> <figure><img src="/glyph/book/images/glyph/commands_tasks.png" /><figcaption>Some of Glyph default commands and tasks</figcaption></figure> <p>As you can see:</p> <ul> <li>All commands call at at least one task.</li> <li>There are several task inter-dependencies spanning across three main Rake namespaces: <ul> <li><code>project:</code> — used for tasks affecting only the physical structure of the Glyph project.</li> <li><code>load:</code> — used to load all kinds of files.</li> <li><code>generate:</code> — used to generate files or copy files from source to output directories</li> </ul></li> </ul> <aside class="box"> <div class="box-title">Example</div> <p>Suppose you want to generate a <span class="caps">PDF</span> file by issuing the <code>glyph compile -f pdf</code> command. Under the hood, Glyph calls the following tasks:</p> <ol> <li><code>load:config</code> — Load the configuration files</li> <li><code>load:tasks</code> — Load custom tasks (if any)</li> <li><code>load:commands</code> — Load custom commands (if any)</li> <li><code>load:snippets</code> — Load snippets from the <code>snippet.yml</code> file</li> <li><code>load:macros</code> — Load macros</li> <li><code>load:all</code> — Dummy task used to call the previous ones</li> <li><code>generate:document</code> — Parse, analyze and finalize the Glyph document</li> <li><code>generate:images</code> — Copy images to the output directory (if any)</li> <li><code>generate:styles</code> — Copy stylesheets to the output directory (if necessary)</li> <li><code>generate:html</code> — Generate a standalone <span class="caps">HTML</span> file</li> <li><code>generate:pdf</code> — Generate a <span class="caps">PDF</span> file from a standalone <span class="caps">HTML</span> file</li> </ol> </aside> </section> <nav class="navigation"><a href="/glyph/book/extending/further_reading.html">Further Reading</a> | <a href="/glyph/book/index.html">Contents</a> | <a href="/glyph/book/extending/task.html">Defining Custom Tasks</a></nav> <nav id="sharing-buttons"> <a href="http://twitter.com/share" class="twitter-share-button" data-count="horizontal" data-via="h3rald">Tweet</a> <script type="text/javascript" src="http://platform.twitter.com/widgets.js"></script> <g:plusone size="medium"></g:plusone> <script type="text/javascript"> (function() { var po = document.createElement('script'); po.type = 'text/javascript'; po.async = true; po.src = 'https://apis.google.com/js/plusone.js'; var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(po, s); })(); </script> </nav> </section> </article> <footer> <section class="ads"> <script type="text/javascript"><!-- google_ad_client = "pub-2871497824158668"; /* 728x90, created 9/10/10 */ google_ad_slot = "3963343166"; google_ad_width = 728; google_ad_height = 90; //--> </script> <script type="text/javascript" src="http://pagead2.googlesyndication.com/pagead/show_ads.js"> </script> </section> <section> <nav> <a href="/about/">ABOUT</a>|<a href="/contact/">CONTACT</a> </nav> <p>H3RALD Web Site v8.1.2 © 2004 — 2011 <em>Fabio Cevasco</em></p> </section> </footer> </section><!-- #container end --> <!-- Start Google Analytics --> <script type="text/javascript"> var _gaq = _gaq || []; _gaq.push(['_setAccount', 'UA-18587377-1']); _gaq.push(['_trackPageview']); (function() { var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true; ga.src = ('https:' == document.location.protocol ? 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