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instiki/vendor/plugins/erubis-2.6.5/doc-api/classes/Erubis/Main.html
Jacques Distler a5e08f7bcc Rails_xss Plugin 
I installed the rails_xss plugin, for
the main purpose of seeing what will
break with Rails 3.0 (where the behaviour
of the plugin is the default). I think
I've fixed everything, but let me know if you
see stuff that is HTML-escaped, which
shouldn't be.

As a side benefit, we now use Erubis,
rather than ERB, to render templates.
They tell me it's faster ...
2010-05-26 00:27:49 -05:00

341 lines
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<?xml version="1.0" encoding="iso-8859-1"?>
<!DOCTYPE html
PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<title>Class: Erubis::Main</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<meta http-equiv="Content-Script-Type" content="text/javascript" />
<link rel="stylesheet" href="../.././rdoc-style.css" type="text/css" media="screen" />
<script type="text/javascript">
// <![CDATA[
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}
function toggleCode( id ) {
if ( document.getElementById )
elem = document.getElementById( id );
else if ( document.all )
elem = eval( "document.all." + id );
else
return false;
elemStyle = elem.style;
if ( elemStyle.display != "block" ) {
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} else {
elemStyle.display = "none"
}
return true;
}
// Make codeblocks hidden by default
document.writeln( "<style type=\"text/css\">div.method-source-code { display: none }</style>" )
// ]]>
</script>
</head>
<body>
<div id="classHeader">
<table class="header-table">
<tr class="top-aligned-row">
<td><strong>Class</strong></td>
<td class="class-name-in-header">Erubis::Main</td>
</tr>
<tr class="top-aligned-row">
<td><strong>In:</strong></td>
<td>
<a href="../../files/erubis/main_rb.html">
erubis/main.rb
</a>
<br />
</td>
</tr>
<tr class="top-aligned-row">
<td><strong>Parent:</strong></td>
<td>
Object
</td>
</tr>
</table>
</div>
<!-- banner header -->
<div id="bodyContent">
<div id="contextContent">
<div id="description">
<p>
<a href="Main.html#M000215">main</a> class of command
</p>
<p>
ex.
</p>
<pre>
Main.main(ARGV)
</pre>
</div>
</div>
<div id="method-list">
<h3 class="section-bar">Methods</h3>
<div class="name-list">
<a href="#M000217">execute</a>&nbsp;&nbsp;
<a href="#M000215">main</a>&nbsp;&nbsp;
<a href="#M000216">new</a>&nbsp;&nbsp;
</div>
</div>
</div>
<!-- if includes -->
<div id="section">
<!-- if method_list -->
<div id="methods">
<h3 class="section-bar">Public Class methods</h3>
<div id="method-M000215" class="method-detail">
<a name="M000215"></a>
<div class="method-heading">
<a href="#M000215" class="method-signature">
<span class="method-name">main</span><span class="method-args">(argv=ARGV)</span>
</a>
</div>
<div class="method-description">
<p><a class="source-toggle" href="#"
onclick="toggleCode('M000215-source');return false;">[Source]</a></p>
<div class="method-source-code" id="M000215-source">
<pre>
<span class="ruby-comment cmt"># File erubis/main.rb, line 39</span>
<span class="ruby-keyword kw">def</span> <span class="ruby-keyword kw">self</span>.<span class="ruby-identifier">main</span>(<span class="ruby-identifier">argv</span>=<span class="ruby-constant">ARGV</span>)
<span class="ruby-identifier">status</span> = <span class="ruby-value">0</span>
<span class="ruby-keyword kw">begin</span>
<span class="ruby-constant">Main</span>.<span class="ruby-identifier">new</span>.<span class="ruby-identifier">execute</span>(<span class="ruby-constant">ARGV</span>)
<span class="ruby-keyword kw">rescue</span> <span class="ruby-constant">CommandOptionError</span> =<span class="ruby-operator">&gt;</span> <span class="ruby-identifier">ex</span>
<span class="ruby-identifier">$stderr</span>.<span class="ruby-identifier">puts</span> <span class="ruby-identifier">ex</span>.<span class="ruby-identifier">message</span>
<span class="ruby-identifier">status</span> = <span class="ruby-value">1</span>
<span class="ruby-keyword kw">end</span>
<span class="ruby-identifier">exit</span>(<span class="ruby-identifier">status</span>)
<span class="ruby-keyword kw">end</span>
</pre>
</div>
</div>
</div>
<div id="method-M000216" class="method-detail">
<a name="M000216"></a>
<div class="method-heading">
<a href="#M000216" class="method-signature">
<span class="method-name">new</span><span class="method-args">()</span>
</a>
</div>
<div class="method-description">
<p><a class="source-toggle" href="#"
onclick="toggleCode('M000216-source');return false;">[Source]</a></p>
<div class="method-source-code" id="M000216-source">
<pre>
<span class="ruby-comment cmt"># File erubis/main.rb, line 50</span>
<span class="ruby-keyword kw">def</span> <span class="ruby-identifier">initialize</span>
<span class="ruby-ivar">@single_options</span> = <span class="ruby-value str">&quot;hvxztTSbeBXNUC&quot;</span>
<span class="ruby-ivar">@arg_options</span> = <span class="ruby-value str">&quot;pcrfKIlaE&quot;</span> <span class="ruby-comment cmt">#C</span>
<span class="ruby-ivar">@option_names</span> = {
<span class="ruby-value str">'h'</span> =<span class="ruby-operator">&gt;</span> <span class="ruby-identifier">:help</span>,
<span class="ruby-value str">'v'</span> =<span class="ruby-operator">&gt;</span> <span class="ruby-identifier">:version</span>,
<span class="ruby-value str">'x'</span> =<span class="ruby-operator">&gt;</span> <span class="ruby-identifier">:source</span>,
<span class="ruby-value str">'z'</span> =<span class="ruby-operator">&gt;</span> <span class="ruby-identifier">:syntax</span>,
<span class="ruby-value str">'T'</span> =<span class="ruby-operator">&gt;</span> <span class="ruby-identifier">:unexpand</span>,
<span class="ruby-value str">'t'</span> =<span class="ruby-operator">&gt;</span> <span class="ruby-identifier">:untabify</span>, <span class="ruby-comment cmt"># obsolete</span>
<span class="ruby-value str">'S'</span> =<span class="ruby-operator">&gt;</span> <span class="ruby-identifier">:intern</span>,
<span class="ruby-value str">'b'</span> =<span class="ruby-operator">&gt;</span> <span class="ruby-identifier">:bodyonly</span>,
<span class="ruby-value str">'B'</span> =<span class="ruby-operator">&gt;</span> <span class="ruby-identifier">:binding</span>,
<span class="ruby-value str">'p'</span> =<span class="ruby-operator">&gt;</span> <span class="ruby-identifier">:pattern</span>,
<span class="ruby-value str">'c'</span> =<span class="ruby-operator">&gt;</span> <span class="ruby-identifier">:context</span>,
<span class="ruby-comment cmt">#'C' =&gt; :class,</span>
<span class="ruby-value str">'e'</span> =<span class="ruby-operator">&gt;</span> <span class="ruby-identifier">:escape</span>,
<span class="ruby-value str">'r'</span> =<span class="ruby-operator">&gt;</span> <span class="ruby-identifier">:requires</span>,
<span class="ruby-value str">'f'</span> =<span class="ruby-operator">&gt;</span> <span class="ruby-identifier">:datafiles</span>,
<span class="ruby-value str">'K'</span> =<span class="ruby-operator">&gt;</span> <span class="ruby-identifier">:kanji</span>,
<span class="ruby-value str">'I'</span> =<span class="ruby-operator">&gt;</span> <span class="ruby-identifier">:includes</span>,
<span class="ruby-value str">'l'</span> =<span class="ruby-operator">&gt;</span> <span class="ruby-identifier">:lang</span>,
<span class="ruby-value str">'a'</span> =<span class="ruby-operator">&gt;</span> <span class="ruby-identifier">:action</span>,
<span class="ruby-value str">'E'</span> =<span class="ruby-operator">&gt;</span> <span class="ruby-identifier">:enhancers</span>,
<span class="ruby-value str">'X'</span> =<span class="ruby-operator">&gt;</span> <span class="ruby-identifier">:notext</span>,
<span class="ruby-value str">'N'</span> =<span class="ruby-operator">&gt;</span> <span class="ruby-identifier">:linenum</span>,
<span class="ruby-value str">'U'</span> =<span class="ruby-operator">&gt;</span> <span class="ruby-identifier">:unique</span>,
<span class="ruby-value str">'C'</span> =<span class="ruby-operator">&gt;</span> <span class="ruby-identifier">:compact</span>,
}
<span class="ruby-identifier">assert</span> <span class="ruby-keyword kw">unless</span> <span class="ruby-ivar">@single_options</span>.<span class="ruby-identifier">length</span> <span class="ruby-operator">+</span> <span class="ruby-ivar">@arg_options</span>.<span class="ruby-identifier">length</span> <span class="ruby-operator">==</span> <span class="ruby-ivar">@option_names</span>.<span class="ruby-identifier">length</span>
(<span class="ruby-ivar">@single_options</span> <span class="ruby-operator">+</span> <span class="ruby-ivar">@arg_options</span>).<span class="ruby-identifier">each_byte</span> <span class="ruby-keyword kw">do</span> <span class="ruby-operator">|</span><span class="ruby-identifier">ch</span><span class="ruby-operator">|</span>
<span class="ruby-identifier">assert</span> <span class="ruby-keyword kw">unless</span> <span class="ruby-ivar">@option_names</span>.<span class="ruby-identifier">key?</span>(<span class="ruby-identifier">ch</span>.<span class="ruby-identifier">chr</span>)
<span class="ruby-keyword kw">end</span>
<span class="ruby-keyword kw">end</span>
</pre>
</div>
</div>
</div>
<h3 class="section-bar">Public Instance methods</h3>
<div id="method-M000217" class="method-detail">
<a name="M000217"></a>
<div class="method-heading">
<a href="#M000217" class="method-signature">
<span class="method-name">execute</span><span class="method-args">(argv=ARGV)</span>
</a>
</div>
<div class="method-description">
<p><a class="source-toggle" href="#"
onclick="toggleCode('M000217-source');return false;">[Source]</a></p>
<div class="method-source-code" id="M000217-source">
<pre>
<span class="ruby-comment cmt"># File erubis/main.rb, line 86</span>
<span class="ruby-keyword kw">def</span> <span class="ruby-identifier">execute</span>(<span class="ruby-identifier">argv</span>=<span class="ruby-constant">ARGV</span>)
<span class="ruby-comment cmt">## parse command-line options</span>
<span class="ruby-identifier">options</span>, <span class="ruby-identifier">properties</span> = <span class="ruby-identifier">parse_argv</span>(<span class="ruby-identifier">argv</span>, <span class="ruby-ivar">@single_options</span>, <span class="ruby-ivar">@arg_options</span>)
<span class="ruby-identifier">filenames</span> = <span class="ruby-identifier">argv</span>
<span class="ruby-identifier">options</span>[<span class="ruby-value str">'h'</span>] = <span class="ruby-keyword kw">true</span> <span class="ruby-keyword kw">if</span> <span class="ruby-identifier">properties</span>[<span class="ruby-identifier">:help</span>]
<span class="ruby-identifier">opts</span> = <span class="ruby-constant">Object</span>.<span class="ruby-identifier">new</span>
<span class="ruby-identifier">arr</span> = <span class="ruby-ivar">@option_names</span>.<span class="ruby-identifier">collect</span> {<span class="ruby-operator">|</span><span class="ruby-identifier">ch</span>, <span class="ruby-identifier">name</span><span class="ruby-operator">|</span> <span class="ruby-node">&quot;def #{name}; @#{name}; end\n&quot;</span> }
<span class="ruby-identifier">opts</span>.<span class="ruby-identifier">instance_eval</span> <span class="ruby-identifier">arr</span>.<span class="ruby-identifier">join</span>
<span class="ruby-identifier">options</span>.<span class="ruby-identifier">each</span> <span class="ruby-keyword kw">do</span> <span class="ruby-operator">|</span><span class="ruby-identifier">ch</span>, <span class="ruby-identifier">val</span><span class="ruby-operator">|</span>
<span class="ruby-identifier">name</span> = <span class="ruby-ivar">@option_names</span>[<span class="ruby-identifier">ch</span>]
<span class="ruby-identifier">opts</span>.<span class="ruby-identifier">instance_variable_set</span>(<span class="ruby-node">&quot;@#{name}&quot;</span>, <span class="ruby-identifier">val</span>)
<span class="ruby-keyword kw">end</span>
<span class="ruby-comment cmt">## help, version, enhancer list</span>
<span class="ruby-keyword kw">if</span> <span class="ruby-identifier">opts</span>.<span class="ruby-identifier">help</span> <span class="ruby-operator">||</span> <span class="ruby-identifier">opts</span>.<span class="ruby-identifier">version</span>
<span class="ruby-identifier">puts</span> <span class="ruby-identifier">version</span>() <span class="ruby-keyword kw">if</span> <span class="ruby-identifier">opts</span>.<span class="ruby-identifier">version</span>
<span class="ruby-identifier">puts</span> <span class="ruby-identifier">usage</span>() <span class="ruby-keyword kw">if</span> <span class="ruby-identifier">opts</span>.<span class="ruby-identifier">help</span>
<span class="ruby-identifier">puts</span> <span class="ruby-identifier">show_properties</span>() <span class="ruby-keyword kw">if</span> <span class="ruby-identifier">opts</span>.<span class="ruby-identifier">help</span>
<span class="ruby-identifier">puts</span> <span class="ruby-identifier">show_enhancers</span>() <span class="ruby-keyword kw">if</span> <span class="ruby-identifier">opts</span>.<span class="ruby-identifier">help</span>
<span class="ruby-keyword kw">return</span>
<span class="ruby-keyword kw">end</span>
<span class="ruby-comment cmt">## include path</span>
<span class="ruby-identifier">opts</span>.<span class="ruby-identifier">includes</span>.<span class="ruby-identifier">split</span>(<span class="ruby-regexp re">/,/</span>).<span class="ruby-identifier">each</span> <span class="ruby-keyword kw">do</span> <span class="ruby-operator">|</span><span class="ruby-identifier">path</span><span class="ruby-operator">|</span>
<span class="ruby-identifier">$:</span> <span class="ruby-operator">&lt;&lt;</span> <span class="ruby-identifier">path</span>
<span class="ruby-keyword kw">end</span> <span class="ruby-keyword kw">if</span> <span class="ruby-identifier">opts</span>.<span class="ruby-identifier">includes</span>
<span class="ruby-comment cmt">## require library</span>
<span class="ruby-identifier">opts</span>.<span class="ruby-identifier">requires</span>.<span class="ruby-identifier">split</span>(<span class="ruby-regexp re">/,/</span>).<span class="ruby-identifier">each</span> <span class="ruby-keyword kw">do</span> <span class="ruby-operator">|</span><span class="ruby-identifier">library</span><span class="ruby-operator">|</span>
<span class="ruby-identifier">require</span> <span class="ruby-identifier">library</span>
<span class="ruby-keyword kw">end</span> <span class="ruby-keyword kw">if</span> <span class="ruby-identifier">opts</span>.<span class="ruby-identifier">requires</span>
<span class="ruby-comment cmt">## action</span>
<span class="ruby-identifier">action</span> = <span class="ruby-identifier">opts</span>.<span class="ruby-identifier">action</span>
<span class="ruby-identifier">action</span> <span class="ruby-operator">||=</span> <span class="ruby-value str">'syntax'</span> <span class="ruby-keyword kw">if</span> <span class="ruby-identifier">opts</span>.<span class="ruby-identifier">syntax</span>
<span class="ruby-identifier">action</span> <span class="ruby-operator">||=</span> <span class="ruby-value str">'convert'</span> <span class="ruby-keyword kw">if</span> <span class="ruby-identifier">opts</span>.<span class="ruby-identifier">source</span> <span class="ruby-operator">||</span> <span class="ruby-identifier">opts</span>.<span class="ruby-identifier">notext</span>
<span class="ruby-comment cmt">## lang</span>
<span class="ruby-identifier">lang</span> = <span class="ruby-identifier">opts</span>.<span class="ruby-identifier">lang</span> <span class="ruby-operator">||</span> <span class="ruby-value str">'ruby'</span>
<span class="ruby-identifier">action</span> <span class="ruby-operator">||=</span> <span class="ruby-value str">'convert'</span> <span class="ruby-keyword kw">if</span> <span class="ruby-identifier">opts</span>.<span class="ruby-identifier">lang</span>
<span class="ruby-comment cmt">## class name of Eruby</span>
<span class="ruby-comment cmt">#classname = opts.class</span>
<span class="ruby-identifier">classname</span> = <span class="ruby-keyword kw">nil</span>
<span class="ruby-identifier">klass</span> = <span class="ruby-identifier">get_classobj</span>(<span class="ruby-identifier">classname</span>, <span class="ruby-identifier">lang</span>, <span class="ruby-identifier">properties</span>[<span class="ruby-identifier">:pi</span>])
<span class="ruby-comment cmt">## kanji code</span>
<span class="ruby-identifier">$KCODE</span> = <span class="ruby-identifier">opts</span>.<span class="ruby-identifier">kanji</span> <span class="ruby-keyword kw">if</span> <span class="ruby-identifier">opts</span>.<span class="ruby-identifier">kanji</span>
<span class="ruby-comment cmt">## read context values from yaml file</span>
<span class="ruby-identifier">datafiles</span> = <span class="ruby-identifier">opts</span>.<span class="ruby-identifier">datafiles</span>
<span class="ruby-identifier">context</span> = <span class="ruby-identifier">load_datafiles</span>(<span class="ruby-identifier">datafiles</span>, <span class="ruby-identifier">opts</span>)
<span class="ruby-comment cmt">## parse context data</span>
<span class="ruby-keyword kw">if</span> <span class="ruby-identifier">opts</span>.<span class="ruby-identifier">context</span>
<span class="ruby-identifier">context</span> = <span class="ruby-identifier">parse_context_data</span>(<span class="ruby-identifier">opts</span>.<span class="ruby-identifier">context</span>, <span class="ruby-identifier">opts</span>)
<span class="ruby-keyword kw">end</span>
<span class="ruby-comment cmt">## properties for engine</span>
<span class="ruby-identifier">properties</span>[<span class="ruby-identifier">:escape</span>] = <span class="ruby-keyword kw">true</span> <span class="ruby-keyword kw">if</span> <span class="ruby-identifier">opts</span>.<span class="ruby-identifier">escape</span> <span class="ruby-operator">&amp;&amp;</span> <span class="ruby-operator">!</span><span class="ruby-identifier">properties</span>.<span class="ruby-identifier">key?</span>(<span class="ruby-identifier">:escape</span>)
<span class="ruby-identifier">properties</span>[<span class="ruby-identifier">:pattern</span>] = <span class="ruby-identifier">opts</span>.<span class="ruby-identifier">pattern</span> <span class="ruby-keyword kw">if</span> <span class="ruby-identifier">opts</span>.<span class="ruby-identifier">pattern</span>
<span class="ruby-comment cmt">#properties[:trim] = false if opts.notrim</span>
<span class="ruby-identifier">properties</span>[<span class="ruby-identifier">:preamble</span>] = <span class="ruby-identifier">properties</span>[<span class="ruby-identifier">:postamble</span>] = <span class="ruby-keyword kw">false</span> <span class="ruby-keyword kw">if</span> <span class="ruby-identifier">opts</span>.<span class="ruby-identifier">bodyonly</span>
<span class="ruby-identifier">properties</span>[<span class="ruby-identifier">:pi</span>] = <span class="ruby-keyword kw">nil</span> <span class="ruby-keyword kw">if</span> <span class="ruby-identifier">properties</span>[<span class="ruby-identifier">:pi</span>] <span class="ruby-operator">==</span> <span class="ruby-keyword kw">true</span>
<span class="ruby-comment cmt">## create engine and extend enhancers</span>
<span class="ruby-identifier">engine</span> = <span class="ruby-identifier">klass</span>.<span class="ruby-identifier">new</span>(<span class="ruby-keyword kw">nil</span>, <span class="ruby-identifier">properties</span>)
<span class="ruby-identifier">enhancers</span> = <span class="ruby-identifier">get_enhancers</span>(<span class="ruby-identifier">opts</span>.<span class="ruby-identifier">enhancers</span>)
<span class="ruby-comment cmt">#enhancers.push(Erubis::EscapeEnhancer) if opts.escape</span>
<span class="ruby-identifier">enhancers</span>.<span class="ruby-identifier">each</span> <span class="ruby-keyword kw">do</span> <span class="ruby-operator">|</span><span class="ruby-identifier">enhancer</span><span class="ruby-operator">|</span>
<span class="ruby-identifier">engine</span>.<span class="ruby-identifier">extend</span>(<span class="ruby-identifier">enhancer</span>)
<span class="ruby-identifier">engine</span>.<span class="ruby-identifier">bipattern</span> = <span class="ruby-identifier">properties</span>[<span class="ruby-identifier">:bipattern</span>] <span class="ruby-keyword kw">if</span> <span class="ruby-identifier">enhancer</span> <span class="ruby-operator">==</span> <span class="ruby-constant">Erubis</span><span class="ruby-operator">::</span><span class="ruby-constant">BiPatternEnhancer</span>
<span class="ruby-keyword kw">end</span>
<span class="ruby-comment cmt">## no-text</span>
<span class="ruby-identifier">engine</span>.<span class="ruby-identifier">extend</span>(<span class="ruby-constant">Erubis</span><span class="ruby-operator">::</span><span class="ruby-constant">NoTextEnhancer</span>) <span class="ruby-keyword kw">if</span> <span class="ruby-identifier">opts</span>.<span class="ruby-identifier">notext</span>
<span class="ruby-comment cmt">## convert and execute</span>
<span class="ruby-identifier">val</span> = <span class="ruby-keyword kw">nil</span>
<span class="ruby-identifier">msg</span> = <span class="ruby-value str">&quot;Syntax OK\n&quot;</span>
<span class="ruby-keyword kw">if</span> <span class="ruby-identifier">filenames</span> <span class="ruby-operator">&amp;&amp;</span> <span class="ruby-operator">!</span><span class="ruby-identifier">filenames</span>.<span class="ruby-identifier">empty?</span>
<span class="ruby-identifier">filenames</span>.<span class="ruby-identifier">each</span> <span class="ruby-keyword kw">do</span> <span class="ruby-operator">|</span><span class="ruby-identifier">filename</span><span class="ruby-operator">|</span>
<span class="ruby-constant">File</span>.<span class="ruby-identifier">file?</span>(<span class="ruby-identifier">filename</span>) <span class="ruby-keyword kw">or</span>
<span class="ruby-identifier">raise</span> <span class="ruby-constant">CommandOptionError</span>.<span class="ruby-identifier">new</span>(<span class="ruby-node">&quot;#{filename}: file not found.&quot;</span>)
<span class="ruby-identifier">engine</span>.<span class="ruby-identifier">filename</span> = <span class="ruby-identifier">filename</span>
<span class="ruby-identifier">engine</span>.<span class="ruby-identifier">convert!</span>(<span class="ruby-constant">File</span>.<span class="ruby-identifier">read</span>(<span class="ruby-identifier">filename</span>))
<span class="ruby-identifier">val</span> = <span class="ruby-identifier">do_action</span>(<span class="ruby-identifier">action</span>, <span class="ruby-identifier">engine</span>, <span class="ruby-identifier">context</span>, <span class="ruby-identifier">filename</span>, <span class="ruby-identifier">opts</span>)
<span class="ruby-identifier">msg</span> = <span class="ruby-keyword kw">nil</span> <span class="ruby-keyword kw">if</span> <span class="ruby-identifier">val</span>
<span class="ruby-keyword kw">end</span>
<span class="ruby-keyword kw">else</span>
<span class="ruby-identifier">engine</span>.<span class="ruby-identifier">filename</span> = <span class="ruby-identifier">filename</span> = <span class="ruby-value str">'(stdin)'</span>
<span class="ruby-identifier">engine</span>.<span class="ruby-identifier">convert!</span>(<span class="ruby-identifier">$stdin</span>.<span class="ruby-identifier">read</span>())
<span class="ruby-identifier">val</span> = <span class="ruby-identifier">do_action</span>(<span class="ruby-identifier">action</span>, <span class="ruby-identifier">engine</span>, <span class="ruby-identifier">context</span>, <span class="ruby-identifier">filename</span>, <span class="ruby-identifier">opts</span>)
<span class="ruby-identifier">msg</span> = <span class="ruby-keyword kw">nil</span> <span class="ruby-keyword kw">if</span> <span class="ruby-identifier">val</span>
<span class="ruby-keyword kw">end</span>
<span class="ruby-identifier">print</span> <span class="ruby-identifier">msg</span> <span class="ruby-keyword kw">if</span> <span class="ruby-identifier">action</span> <span class="ruby-operator">==</span> <span class="ruby-value str">'syntax'</span> <span class="ruby-operator">&amp;&amp;</span> <span class="ruby-identifier">msg</span>
<span class="ruby-keyword kw">end</span>
</pre>
</div>
</div>
</div>
</div>
</div>
<div id="validator-badges">
<p><small><a href="http://validator.w3.org/check/referer">[Validate]</a></small></p>
</div>
</body>
</html>
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