lektor-website/docs/api/environment/add-build-program/index.html

329 lines
14 KiB
HTML

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<link rel="stylesheet" href="../../../../static/styles.css?h=ca3aba42">
<link rel="stylesheet" href="../../../../static/pygments.css">
<link rel="shortcut icon" href="../../../../static/favicon.png?h=fa09bedd">
<title>add_build_program | Documentation | Lektor Static Content Management System</title>
</head>
<body class="default">
<nav class="navbar navbar-inverse navbar-static-top">
<div class="container">
<div class="navbar-header">
<button type="button" class="navbar-toggle collapsed"
data-toggle="collapse" data-target="#navbar"
aria-expanded="false" aria-controls="navbar">
<span class="sr-only">Toggle navigation</span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a class="navbar-brand" href="../../../../">Lektor</a>
</div>
<div id="navbar" class="collapse navbar-collapse">
<ul class="nav navbar-nav">
<li><a href="../../../../downloads/">Download</a></li>
<li class="active"><a href="../../../">Documentation</a></li>
<li><a href="../../../../showcase/">Showcase</a></li>
<li><a href="../../../../plugins/">Plugins</a></li>
<li><a href="../../../../community/">Community</a></li>
<li><a href="../../../../blog/">Blog</a></li>
</ul>
</div>
</div>
</nav>
<div class="body-wrapper">
<div class="container">
<div class="row">
<div class="col-sm-3">
<ul class="tree-nav nocontent">
<li><a href="../../../">Welcome</a></li>
<li><a href="../../../what/">What is Lektor</a>
<li><a href="../../../installation/">Installation</a>
<li><a href="../../../quickstart/">Quickstart</a>
<li><a href="../../../project/">Project</a>
<li><a href="../../../content/">Content</a>
<li><a href="../../../templates/">Templates</a>
<li><a href="../../../themes/">Themes</a>
<li><a href="../../../guides/">Guides</a>
<li><a href="../../../deployment/">Deployment</a>
<li><a href="../../../plugins/">Plugins</a>
<li><a href="../../../models/">Data Modelling</a>
<li><a href="../../../cli/">Command Line</a>
<li><a href="../../">API</a>
<ul>
<li><a href="../../build/">Build System</a>
<li><a href="../../databags/">Databags</a>
<li><a href="../../db/">Database</a>
<li><a href="../">Environment</a>
<ul>
<li class="active"><a href="./">add_build_program()</a>
<ul></ul>
<li><a href="../add-publisher/">add_publisher()</a>
<li><a href="../add-type/">add_type()</a>
<li><a href="../generator/">generator()</a>
<li><a href="../jinja-env/">jinja_env</a>
<li><a href="../load-config/">load_config()</a>
<li><a href="../load-plugins/">load_plugins()</a>
<li><a href="../new-pad/">new_pad()</a>
<li><a href="../render-template/">render_template()</a>
<li><a href="../urlresolver/">urlresolver()</a>
<li><a href="../virtualpathresolver/">virtualpathresolver()</a>
</ul>
<li><a href="../../plugins/">Plugins</a>
<li><a href="../../project/">Project</a>
<li><a href="../../publisher/">Publisher</a>
<li><a href="../../templates/">Template API</a>
<li><a href="../../utils/">Utilities</a>
</ul>
<li><a href="../../../search/">Search</a>
</ul>
<div class="visible-md-block visible-lg-block">
<h4>This Page</h4>
<ul class="toc">
<li><a href="#example">Example</a></li>
</ul>
</div>
</div>
<div class="col-sm-9 doc-styling">
<h1><i class="glyphicon glyphicon-cog"></i> <code class="obj">add_build_program</code> <span class="sig">(<code>cls, program</code>)</span></h1>
<ul class=page-meta>
<li>Method of <a href="../">Environment</a></li>
</ul>
<p>This is very experimental API and used to register build programs for
custom source objects. This can be used to implement virtual items. This
works in combination with <a href="../generator/" class="ref">generator</a> and
<a href="../urlresolver/" class="ref">urlresolver</a> and is responsible for generating
artifacts out of source objects.</p>
<h2 id="example">Example</h2><div class="highlight"><pre><span></span><span class="kn">from</span> <span class="nn">lektor.sourceobj</span> <span class="kn">import</span> <span class="n">VirtualSourceObject</span>
<span class="kn">from</span> <span class="nn">lektor.build_programs</span> <span class="kn">import</span> <span class="n">BuildProgram</span>
<span class="kn">from</span> <span class="nn">lektor.utils</span> <span class="kn">import</span> <span class="n">build_url</span>
<span class="k">class</span> <span class="nc">Source</span><span class="p">(</span><span class="n">VirtualSourceObject</span><span class="p">):</span>
<span class="nd">@property</span>
<span class="k">def</span> <span class="nf">path</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="k">return</span> <span class="bp">self</span><span class="o">.</span><span class="n">record</span><span class="o">.</span><span class="n">path</span> <span class="o">+</span> <span class="s1">&#39;@source&#39;</span>
<span class="nd">@property</span>
<span class="k">def</span> <span class="nf">source_content</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="k">with</span> <span class="nb">open</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">record</span><span class="o">.</span><span class="n">source_filename</span><span class="p">)</span> <span class="k">as</span> <span class="n">f</span><span class="p">:</span>
<span class="k">return</span> <span class="n">f</span><span class="o">.</span><span class="n">read</span><span class="p">()</span><span class="o">.</span><span class="n">decode</span><span class="p">(</span><span class="s1">&#39;utf-8&#39;</span><span class="p">)</span>
<span class="nd">@property</span>
<span class="k">def</span> <span class="nf">url_path</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="k">return</span> <span class="n">build_url</span><span class="p">([</span><span class="bp">self</span><span class="o">.</span><span class="n">record</span><span class="o">.</span><span class="n">url_path</span><span class="p">,</span> <span class="s1">&#39;source.txt&#39;</span><span class="p">])</span>
<span class="k">class</span> <span class="nc">SourceBuildProgram</span><span class="p">(</span><span class="n">BuildProgram</span><span class="p">):</span>
<span class="k">def</span> <span class="nf">produce_artifacts</span><span class="p">(</span><span class="bp">self</span><span class="p">):</span>
<span class="bp">self</span><span class="o">.</span><span class="n">declare_artifact</span><span class="p">(</span>
<span class="bp">self</span><span class="o">.</span><span class="n">source</span><span class="o">.</span><span class="n">url_path</span><span class="p">,</span>
<span class="n">sources</span><span class="o">=</span><span class="nb">list</span><span class="p">(</span><span class="bp">self</span><span class="o">.</span><span class="n">source</span><span class="o">.</span><span class="n">iter_source_filenames</span><span class="p">()))</span>
<span class="k">def</span> <span class="nf">build_artifact</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">artifact</span><span class="p">):</span>
<span class="n">artifact</span><span class="o">.</span><span class="n">render_template_into</span><span class="p">(</span><span class="s1">&#39;view_source.html&#39;</span><span class="p">,</span>
<span class="n">this</span><span class="o">=</span><span class="bp">self</span><span class="o">.</span><span class="n">source</span><span class="p">)</span>
<span class="n">env</span><span class="o">.</span><span class="n">add_build_program</span><span class="p">(</span><span class="n">Source</span><span class="p">,</span> <span class="n">SourceBuildProgram</span><span class="p">)</span>
<span class="nd">@env</span><span class="o">.</span><span class="n">virtualpathresolver</span><span class="p">(</span><span class="s1">&#39;source&#39;</span><span class="p">)</span>
<span class="k">def</span> <span class="nf">resolve_virtual_path</span><span class="p">(</span><span class="n">record</span><span class="p">,</span> <span class="n">pieces</span><span class="p">):</span>
<span class="k">if</span> <span class="ow">not</span> <span class="n">pieces</span><span class="p">:</span>
<span class="k">return</span> <span class="n">Source</span><span class="p">(</span><span class="n">record</span><span class="p">)</span>
</pre></div>
<p>And here the example <code>view_source.html</code> template:</p>
<div class="highlight"><pre><span></span><span class="p">&lt;</span><span class="nt">h2</span><span class="p">&gt;</span>Source for <span class="cp">{{</span> <span class="nv">this.parent.path</span> <span class="cp">}}</span><span class="p">&lt;/</span><span class="nt">h2</span><span class="p">&gt;</span>
<span class="p">&lt;</span><span class="nt">pre</span><span class="p">&gt;</span><span class="cp">{{</span> <span class="nv">this.source_content</span> <span class="cp">}}</span><span class="p">&lt;/</span><span class="nt">pre</span><span class="p">&gt;</span>
</pre></div>
<div class="comment-box">
<h2>Comments</h2>
<div id="disqus_thread"></div>
<script>
var disqus_config = function() { this.page.identifier = "/docs/api/environment/add-build-program"; this.page.url = "https://www.getlektor.com/docs/api/environment/add-build-program/"; };
(function() {
var d = document, s = d.createElement('script');
s.src = '//lektordocumentation.disqus.com/embed.js';
s.setAttribute('data-timestamp', +new Date());
(d.head || d.body).appendChild(s);
})();
</script>
<noscript>
Please enable JavaScript to view the <a href="https://disqus.com/?ref_noscript"
rel="nofollow">comments powered by Disqus.</a>
</noscript>
</div>
</div>
</div>
</div>
</div>
<div class="bottomsummary">
<div class="container">
</div>
</div>
<footer>
<div class="container">
<div class="row">
<div class="col-sm-4 icon-bar">
<a href="https://github.com/lektor/lektor/" title="Lektor on GitHub"
><i class="fa fa-github"></i></a>
<a href="https://github.com/lektor/lektor/issues/" title="Report Issues for Lektor"
><i class="fa fa-bug"></i></a>
<a href="https://twitter.com/getlektor" title="Find Lektor on Twitter"
><i class="fa fa-twitter"></i></a>
<a href="https://gitter.im/lektor/lektor" title="Chat on Gitter"
><i class="fa fa-comment"></i></a>
<a href="https://github.com/lektor/lektor-website/tree/master/content/docs/api/environment/add-build-program/contents.lr" title="View source for this page"><i class="fa fa-code"></i></a>
</div>
<div class="col-sm-8">
<a href="../../../../license/">License & Copyright</a>
<a href="../../../../contact/">Contact</a>
Made with <i class="fa fa-fw fa-heart" title="Heart"><span hidden>Heart</span></i> in Carinthia
</div>
</div>
</div>
</footer>
<script type=text/javascript src="../../../../static/app.js?h=bb1b933a" charset="utf-8"></script>
<script>
((window.gitter = {}).chat = {}).options = {
room: 'lektor/lektor',
activationElement: null
};
document.write('<button class="js-gitter-toggle-chat-button">Toggle Chat</button>');
var dnt = navigator.doNotTrack || window.doNotTrack || navigator.msDoNotTrack;
if (dnt != "1" && dnt != "yes") {
window.ga=window.ga||function(){(ga.q=ga.q||[]).push(arguments)};ga.l=+new Date;
ga('create', 'UA-70822533-1', 'auto');
ga('set', 'anonymizeIp', true);
ga('send', 'pageview');
} else {
console.debug("Respecting Do-Not-Track, not running analytics.");
}
</script>
<script async src='https://www.google-analytics.com/analytics.js'></script>
<script async defer id="github-bjs" src="https://buttons.github.io/buttons.js"></script>
<script>!function(d,s,id){var js,fjs=d.getElementsByTagName(s)[0],p=/^http:/.test(d.location)?'http':'https';if(!d.getElementById(id)){js=d.createElement(s);js.id=id;js.src=p+'://platform.twitter.com/widgets.js';fjs.parentNode.insertBefore(js,fjs);}}(document, 'script', 'twitter-wjs');</script>
<script src="https://sidecar.gitter.im/dist/sidecar.v1.js" async defer></script>
</body>
</html>