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<!DOCTYPE html>
<html>
<head>
<title>Docco</title>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<meta name="viewport" content="width=device-width, target-densitydpi=160dpi, initial-scale=1.0, maximum-scale=1.0, user-scalable=0">
<link rel="stylesheet" media="all" href="resources/parallel/docco.css" />
</head>
<body>
<div id="container">
<div id="background"></div>
<ul class="sections">
<li id="section-1">
<div class="annotation">
<div class="pilwrap ">
<a class="pilcrow" href="#section-1">¶</a>
</div>
<h1 id="docco">Docco</h1>
</div>
</li>
<li id="section-2">
<div class="annotation">
<div class="pilwrap ">
<a class="pilcrow" href="#section-2">¶</a>
</div>
<p><strong>Docco</strong> is a quick-and-dirty documentation generator, written in
<a href="http://coffeescript.org/#literate">Literate CoffeeScript</a>.
It produces an HTML document that displays your comments intermingled with your
code. All prose is passed through
<a href="http://daringfireball.net/projects/markdown/syntax">Markdown</a>, and code is
passed through <a href="http://highlightjs.org/">Highlight.js</a> syntax highlighting.
This page is the result of running Docco against its own
<a href="https://github.com/jashkenas/docco/blob/master/docco.litcoffee">source file</a>.</p>
<ol>
<li><p>Install Docco with <strong>npm</strong>: <code>sudo npm install -g docco</code></p>
</li>
<li><p>Run it against your code: <code>docco src/*.coffee</code></p>
</li>
</ol>
<p>There is no “Step 3”. This will generate an HTML page for each of the named
source files, with a menu linking to the other pages, saving the whole mess
into a <code>docs</code> folder (configurable).</p>
<p>The <a href="http://github.com/jashkenas/docco">Docco source</a> is available on GitHub,
and is released under the <a href="http://opensource.org/licenses/MIT">MIT license</a>.</p>
<p>Docco can be used to process code written in any programming language. If it
doesn’t handle your favorite yet, feel free to
<a href="https://github.com/jashkenas/docco/blob/master/resources/languages.json">add it to the list</a>.
Finally, the <a href="http://coffeescript.org/#literate">“literate” style</a> of <em>any</em>
language is also supported — just tack an <code>.md</code> extension on the end:
<code>.coffee.md</code>, <code>.py.md</code>, and so on. Also get usable source code by adding the
<code>--source</code> option while specifying a directory for the files.</p>
<p>By default only single-line comments are processed, block comments may be included
by passing the <code>-b</code> flag to Docco.</p>
<h2 id="partners-in-crime-">Partners in Crime:</h2>
</div>
</li>
<li id="section-3">
<div class="annotation">
<div class="pilwrap ">
<a class="pilcrow" href="#section-3">¶</a>
</div>
<ul>
<li><p>If <strong>Node.js</strong> doesn’t run on your platform, or you’d prefer a more
convenient package, get <a href="http://github.com/rtomayko">Ryan Tomayko</a>‘s
<a href="http://rtomayko.github.io/rocco/rocco.html">Rocco</a>, the <strong>Ruby</strong> port that’s
available as a gem.</p>
</li>
<li><p>If you’re writing shell scripts, try
<a href="http://rtomayko.github.io/shocco/">Shocco</a>, a port for the <strong>POSIX shell</strong>,
also by Mr. Tomayko.</p>
</li>
<li><p>If <strong>Python</strong> is more your speed, take a look at
<a href="http://github.com/fitzgen">Nick Fitzgerald</a>‘s <a href="http://fitzgen.github.io/pycco/">Pycco</a>.</p>
</li>
<li><p>For <strong>Clojure</strong> fans, <a href="http://blog.fogus.me/">Fogus</a>‘s
<a href="http://fogus.me/fun/marginalia/">Marginalia</a> is a bit of a departure from
“quick-and-dirty”, but it’ll get the job done.</p>
</li>
<li><p>There’s a <strong>Go</strong> port called <a href="http://nikhilm.github.io/gocco/">Gocco</a>,
written by <a href="https://github.com/nikhilm">Nikhil Marathe</a>.</p>
</li>
<li><p>For all you <strong>PHP</strong> buffs out there, Fredi Bach’s
<a href="http://jquery-jkit.com/sourcemakeup/">sourceMakeup</a> (we’ll let the faux pas
with respect to our naming scheme slide), should do the trick nicely.</p>
</li>
<li><p><strong>Lua</strong> enthusiasts can get their fix with
<a href="https://github.com/rgieseke">Robert Gieseke</a>‘s <a href="http://rgieseke.github.io/locco/">Locco</a>.</p>
</li>
<li><p>And if you happen to be a <strong>.NET</strong>
aficionado, check out <a href="https://github.com/dontangg">Don Wilson</a>‘s
<a href="http://dontangg.github.io/nocco/">Nocco</a>.</p>
</li>
<li><p>Going further afield from the quick-and-dirty, <a href="http://nevir.github.io/groc/">Groc</a>
is a <strong>CoffeeScript</strong> fork of Docco that adds a searchable table of contents,
and aims to gracefully handle large projects with complex hierarchies of code.</p>
</li>
</ul>
<p>Note that not all ports will support all Docco features … yet.</p>
<h2 id="main-documentation-generation-functions">Main Documentation Generation Functions</h2>
</div>
</li>
<li id="section-4">
<div class="annotation">
<div class="pilwrap ">
<a class="pilcrow" href="#section-4">¶</a>
</div>
<p>Generate the documentation for our configured source file by copying over static
assets, reading all the source files in, splitting them up into prose+code
sections, highlighting each file in the appropriate language, printing them
out in an HTML template, and writing plain code files where instructed.</p>
</div>
<div class="content"><div class='highlight'><pre><span class="hljs-function"><span class="hljs-title">document</span> = <span class="hljs-params">(options = {}, callback)</span> -></span>
config = configure options
source_infos = []
fs.mkdirsSync config.output
fs.mkdirsSync config.source <span class="hljs-keyword">if</span> config.source
callback <span class="hljs-keyword">or</span>= <span class="hljs-function"><span class="hljs-params">(error)</span> -></span> <span class="hljs-keyword">throw</span> error <span class="hljs-keyword">if</span> error
<span class="hljs-function"> <span class="hljs-title">copyAsset</span> = <span class="hljs-params">(file, callback)</span> -></span>
<span class="hljs-keyword">return</span> callback() <span class="hljs-keyword">unless</span> fs.existsSync file
fs.copy file, path.join(config.output, path.basename(file)), callback
<span class="hljs-function"> <span class="hljs-title">complete</span> = -></span>
copyAsset config.css, <span class="hljs-function"><span class="hljs-params">(error)</span> -></span>
<span class="hljs-keyword">return</span> callback error <span class="hljs-keyword">if</span> error
<span class="hljs-keyword">return</span> copyAsset config.public, callback <span class="hljs-keyword">if</span> fs.existsSync config.public
callback()
files = config.sources.slice()
<span class="hljs-function">
<span class="hljs-title">nextFile</span> = -></span>
source = files.shift()
fs.readFile source, <span class="hljs-function"><span class="hljs-params">(error, buffer)</span> -></span>
<span class="hljs-keyword">return</span> callback error <span class="hljs-keyword">if</span> error
code = buffer.toString()
sections = parse source, code, config
format source, sections, config</pre></div></div>
</li>
<li id="section-5">
<div class="annotation">
<div class="pilwrap ">
<a class="pilcrow" href="#section-5">¶</a>
</div>
<p>The <strong>title</strong> of the file is either the first heading in the prose, or the
name of the source file.</p>
</div>
<div class="content"><div class='highlight'><pre> firstSection = _.find sections, <span class="hljs-function"><span class="hljs-params">(section)</span> -></span>
section.docsText.length > <span class="hljs-number">0</span>
first = marked.lexer(firstSection.docsText)[<span class="hljs-number">0</span>] <span class="hljs-keyword">if</span> firstSection
hasTitle = first <span class="hljs-keyword">and</span> first.type <span class="hljs-keyword">is</span> <span class="hljs-string">'heading'</span> <span class="hljs-keyword">and</span> first.depth <span class="hljs-keyword">is</span> <span class="hljs-number">1</span>
title = <span class="hljs-keyword">if</span> hasTitle <span class="hljs-keyword">then</span> first.text <span class="hljs-keyword">else</span> path.basename source
source_infos.push({
<span class="hljs-attribute">source</span>: source,
<span class="hljs-attribute">hasTitle</span>: hasTitle,
<span class="hljs-attribute">title</span>: title,
<span class="hljs-attribute">sections</span>: sections
})
<span class="hljs-keyword">if</span> files.length <span class="hljs-keyword">then</span> nextFile() <span class="hljs-keyword">else</span> outputFiles()</pre></div></div>
</li>
<li id="section-6">
<div class="annotation">
<div class="pilwrap ">
<a class="pilcrow" href="#section-6">¶</a>
</div>
<p>When we have finished all preparations (such as extracting a title for each file),
we produce all output files.</p>
<p>We have collected all titles before outputting the individual files to give the
template access to all sources’ titles for rendering, e.g. when the template
needs to produce a TOC with each file.</p>
</div>
<div class="content"><div class='highlight'><pre><span class="hljs-function"> <span class="hljs-title">outputFiles</span> = -></span>
<span class="hljs-keyword">for</span> info, i <span class="hljs-keyword">in</span> source_infos
write info.source, i, source_infos, config
outputCode info.source, info.sections, config
complete()</pre></div></div>
</li>
<li id="section-7">
<div class="annotation">
<div class="pilwrap ">
<a class="pilcrow" href="#section-7">¶</a>
</div>
<p>Start processing all sources and producing the corresponding files for each:</p>
</div>
<div class="content"><div class='highlight'><pre> nextFile()</pre></div></div>
</li>
<li id="section-8">
<div class="annotation">
<div class="pilwrap ">
<a class="pilcrow" href="#section-8">¶</a>
</div>
<p>Given a string of source code, <strong>parse</strong> out each block of prose and the code that
follows it — by detecting which is which, line by line — and then create an
individual <strong>section</strong> for it. Each section is an object with <code>docsText</code> and
<code>codeText</code> properties, and eventually <code>docsHtml</code> and <code>codeHtml</code> as well.</p>
</div>
<div class="content"><div class='highlight'><pre><span class="hljs-function"><span class="hljs-title">parse</span> = <span class="hljs-params">(source, code, config = {})</span> -></span>
lines = code.split <span class="hljs-string">'\n'</span>
sections = []
lang = getLanguage source, config
hasCode = docsText = codeText = <span class="hljs-string">''</span>
param = <span class="hljs-string">''</span>
in_block = <span class="hljs-number">0</span>
ignore_this_block = <span class="hljs-number">0</span>
<span class="hljs-function">
<span class="hljs-title">save</span> = -></span>
sections.push {docsText, codeText}
hasCode = docsText = codeText = <span class="hljs-string">''</span></pre></div></div>
</li>
<li id="section-9">
<div class="annotation">
<div class="pilwrap ">
<a class="pilcrow" href="#section-9">¶</a>
</div>
<p>Our quick-and-dirty implementation of the literate programming style. Simply
invert the prose and code relationship on a per-line basis, and then continue as
normal below.</p>
</div>
<div class="content"><div class='highlight'><pre> <span class="hljs-keyword">if</span> lang.literate
isText = maybeCode = <span class="hljs-literal">yes</span>
<span class="hljs-keyword">for</span> line, i <span class="hljs-keyword">in</span> lines
lines[i] = <span class="hljs-keyword">if</span> maybeCode <span class="hljs-keyword">and</span> match = <span class="hljs-regexp">/^([ ]{4}|[ ]{0,3}\t)/</span>.exec line
isText = <span class="hljs-literal">no</span>
line[match[<span class="hljs-number">0</span>].length..]
<span class="hljs-keyword">else</span> <span class="hljs-keyword">if</span> maybeCode = <span class="hljs-regexp">/^\s*$/</span>.test line
<span class="hljs-keyword">if</span> isText <span class="hljs-keyword">then</span> lang.symbol <span class="hljs-keyword">else</span> <span class="hljs-string">''</span>
<span class="hljs-keyword">else</span>
isText = <span class="hljs-literal">yes</span>
lang.symbol + <span class="hljs-string">' '</span> + line</pre></div></div>
</li>
<li id="section-10">
<div class="annotation">
<div class="pilwrap ">
<a class="pilcrow" href="#section-10">¶</a>
</div>
<p>Iterate over the source lines, and separate out single/block
comments from code chunks.</p>
</div>
<div class="content"><div class='highlight'><pre> <span class="hljs-keyword">for</span> line <span class="hljs-keyword">in</span> lines
<span class="hljs-keyword">if</span> in_block
++in_block
raw_line = line</pre></div></div>
</li>
<li id="section-11">
<div class="annotation">
<div class="pilwrap ">
<a class="pilcrow" href="#section-11">¶</a>
</div>
<p>If we’re not in a block comment, and find a match for the start
of one, eat the tokens, and note that we’re now in a block.</p>
</div>
<div class="content"><div class='highlight'><pre> <span class="hljs-keyword">if</span> <span class="hljs-keyword">not</span> in_block <span class="hljs-keyword">and</span> config.blocks <span class="hljs-keyword">and</span> lang.blocks <span class="hljs-keyword">and</span> line.match(lang.commentEnter)
line = line.replace(lang.commentEnter, <span class="hljs-string">''</span>)</pre></div></div>
</li>
<li id="section-12">
<div class="annotation">
<div class="pilwrap ">
<a class="pilcrow" href="#section-12">¶</a>
</div>
<p>Make sure this is a comment that we actually want to process; if not, treat it as code</p>
</div>
<div class="content"><div class='highlight'><pre> in_block = <span class="hljs-number">1</span>
<span class="hljs-keyword">if</span> lang.commentIgnore <span class="hljs-keyword">and</span> line.match(lang.commentIgnore)
ignore_this_block = <span class="hljs-number">1</span></pre></div></div>
</li>
<li id="section-13">
<div class="annotation">
<div class="pilwrap ">
<a class="pilcrow" href="#section-13">¶</a>
</div>
<p>Process the line, marking it as docs if we’re in a block comment,
or we find a single-line comment marker.</p>
</div>
<div class="content"><div class='highlight'><pre> single = (<span class="hljs-keyword">not</span> in_block <span class="hljs-keyword">and</span> lang.commentMatcher <span class="hljs-keyword">and</span> line.match(lang.commentMatcher) <span class="hljs-keyword">and</span> <span class="hljs-keyword">not</span> line.match(lang.commentFilter))</pre></div></div>
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<p>If there’s a single comment, and we’re not in a block, eat the
comment token.</p>
</div>
<div class="content"><div class='highlight'><pre> <span class="hljs-keyword">if</span> single
line = line.replace(lang.commentMatcher, <span class="hljs-string">''</span>)</pre></div></div>
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<p>Make sure this is a comment that we actually want to process; if not, treat it as code</p>
</div>
<div class="content"><div class='highlight'><pre> <span class="hljs-keyword">if</span> lang.commentIgnore <span class="hljs-keyword">and</span> line.match(lang.commentIgnore)
ignore_this_block = <span class="hljs-number">1</span></pre></div></div>
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<p>Prepare the line further when it is (part of) a comment line.</p>
</div>
<div class="content"><div class='highlight'><pre> <span class="hljs-keyword">if</span> in_block <span class="hljs-keyword">or</span> single</pre></div></div>
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<p>If we’re in a block comment and we find the end of it in the line, eat
the end token, and note that we’re no longer in the block.</p>
</div>
<div class="content"><div class='highlight'><pre> <span class="hljs-keyword">if</span> in_block <span class="hljs-keyword">and</span> line.match(lang.commentExit)
line = line.replace(lang.commentExit, <span class="hljs-string">''</span>)
in_block = -<span class="hljs-number">1</span></pre></div></div>
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<p>If we’re in a block comment and are processing comment line 2 or further, eat the
optional comment prefix (for C style comments, that would generally be
a single ‘*’, for example).</p>
</div>
<div class="content"><div class='highlight'><pre> <span class="hljs-keyword">if</span> in_block > <span class="hljs-number">1</span> <span class="hljs-keyword">and</span> lang.commentNext
line = line.replace(lang.commentNext, <span class="hljs-string">''</span>);</pre></div></div>
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<p>If we happen upon a JavaDoc @param parameter, then process that item.</p>
</div>
<div class="content"><div class='highlight'><pre> <span class="hljs-keyword">if</span> lang.commentParam
param = line.match(lang.commentParam);
<span class="hljs-keyword">if</span> param
line = line.replace(param[<span class="hljs-number">0</span>], <span class="hljs-string">'\n'</span> + <span class="hljs-string">'<b>'</span> + param[<span class="hljs-number">1</span>] + <span class="hljs-string">'</b>'</span>);
<span class="hljs-keyword">if</span> <span class="hljs-keyword">not</span> ignore_this_block <span class="hljs-keyword">and</span> (in_block <span class="hljs-keyword">or</span> single)</pre></div></div>
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<p>If we have code text, and we’re entering a comment, store off
the current docs and code, then start a new section.</p>
</div>
<div class="content"><div class='highlight'><pre> save() <span class="hljs-keyword">if</span> hasCode
docsText += line + <span class="hljs-string">'\n'</span>
save() <span class="hljs-keyword">if</span> <span class="hljs-regexp">/^(---+|===+)$/</span>.test line <span class="hljs-keyword">or</span> in_block == -<span class="hljs-number">1</span>
<span class="hljs-keyword">else</span>
hasCode = <span class="hljs-literal">yes</span>
codeText += line + <span class="hljs-string">'\n'</span></pre></div></div>
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<p>Reset <code>in_block</code> when we have reached the end of the comment block.</p>
</div>
<div class="content"><div class='highlight'><pre> <span class="hljs-keyword">if</span> in_block == -<span class="hljs-number">1</span>
in_block = <span class="hljs-number">0</span></pre></div></div>
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<p>Reset <code>ignore_this_block</code> when we have reached the end of the comment block or single comment line.</p>
</div>
<div class="content"><div class='highlight'><pre> <span class="hljs-keyword">if</span> <span class="hljs-keyword">not</span> in_block
ignore_this_block = <span class="hljs-number">0</span></pre></div></div>
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<p>Save the final section, if any, and return the sections array.</p>
</div>
<div class="content"><div class='highlight'><pre> save()
sections</pre></div></div>
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<p>To <strong>format</strong> and highlight the now-parsed sections of code, we use <strong>Highlight.js</strong>
over stdio, and run the text of their corresponding comments through
<strong>Markdown</strong>, using <a href="https://github.com/chjj/marked">Marked</a>.</p>
</div>
<div class="content"><div class='highlight'><pre><span class="hljs-function"><span class="hljs-title">format</span> = <span class="hljs-params">(source, sections, config)</span> -></span>
language = getLanguage source, config</pre></div></div>
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<p>Pass any user defined options to Marked if specified via command line option,
otherwise revert use the default configuration.</p>
</div>
<div class="content"><div class='highlight'><pre> markedOptions = config.marked_options
marked.setOptions markedOptions</pre></div></div>
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<p>Tell Marked how to highlight code blocks within comments, treating that code
as either the language specified in the code block or the language of the file
if not specified.</p>
</div>
<div class="content"><div class='highlight'><pre> marked.setOptions {
<span class="hljs-attribute">highlight</span>: <span class="hljs-function"><span class="hljs-params">(code, lang)</span> -></span>
lang <span class="hljs-keyword">or</span>= language.name
<span class="hljs-keyword">if</span> highlightjs.getLanguage(lang)
highlightjs.highlight(lang, code).value
<span class="hljs-keyword">else</span>
<span class="hljs-built_in">console</span>.warn <span class="hljs-string">"docco: couldn't highlight code block with unknown language '<span class="hljs-subst">#{lang}</span>' in <span class="hljs-subst">#{source}</span>"</span>
code
}</pre></div></div>
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<p>Process each chunk:</p>
<ul>
<li>both the code and text blocks are stripped of trailing empty lines</li>
<li>the code block is marked up by highlighted to show a nice HTML rendition of the code</li>
<li>the text block is fed to Marked to turn it into HTML</li>
</ul>
</div>
<div class="content"><div class='highlight'><pre> <span class="hljs-keyword">for</span> section, i <span class="hljs-keyword">in</span> sections
code = section.codeText
section.codeText = code = code.replace(<span class="hljs-regexp">/\s+$/</span>, <span class="hljs-string">''</span>)
code = highlightjs.highlight(language.name, code).value
section.codeHtml = <span class="hljs-string">"<div class='highlight'><pre><span class="hljs-subst">#{code}</span></pre></div>"</span>
doc = section.docsText
section.docsText = doc = doc.replace(<span class="hljs-regexp">/\s+$/</span>, <span class="hljs-string">''</span>)
section.docsHtml = marked(doc)</pre></div></div>
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<p>Once all of the code has finished highlighting, we can <strong>write</strong> the resulting
documentation file by passing the completed HTML sections into the template,
and rendering it to the specified output path.</p>
</div>
<div class="content"><div class='highlight'><pre><span class="hljs-function"><span class="hljs-title">write</span> = <span class="hljs-params">(source, title_idx, source_infos, config)</span> -></span>
<span class="hljs-function">
<span class="hljs-title">destination</span> = <span class="hljs-params">(file)</span> -></span>
path.join(config.output, file + <span class="hljs-string">'.html'</span>)
<span class="hljs-function">
<span class="hljs-title">relative</span> = <span class="hljs-params">(file)</span> -></span>
to = path.dirname(path.resolve(file))
from = path.dirname(path.resolve(destination(source)))
path.join(path.relative(from, to), path.basename(file))
css = relative path.join(config.output, path.basename(config.css))
html = config.template {
<span class="hljs-attribute">sources</span>: config.sources
<span class="hljs-attribute">titles</span>: source_infos.map (info) ->
info.title
css
<span class="hljs-attribute">title</span>: source_infos[title_idx].title
<span class="hljs-attribute">hasTitle</span>: source_infos[title_idx].hasTitle
<span class="hljs-attribute">sections</span>: source_infos[title_idx].sections
path
destination
relative
}
<span class="hljs-built_in">console</span>.log <span class="hljs-string">"docco: <span class="hljs-subst">#{source}</span> -> <span class="hljs-subst">#{destination source}</span>"</span>
fs.writeFileSync destination(source), html</pre></div></div>
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<p>Print out the consolidated code sections parsed from the source file in to another
file. No documentation will be included in the new file.</p>
</div>
<div class="content"><div class='highlight'><pre><span class="hljs-function"><span class="hljs-title">outputCode</span> = <span class="hljs-params">(source, sections, config)</span> -></span>
lang = getLanguage source, config
<span class="hljs-function">
<span class="hljs-title">destination</span> = <span class="hljs-params">(file)</span> -></span>
path.join config.source, path.basename(file, path.extname file) + lang.source
<span class="hljs-keyword">if</span> config.source
code = _.pluck(sections, <span class="hljs-string">'codeText'</span>).join <span class="hljs-string">'\n'</span>
code = code.trim().replace <span class="hljs-regexp">/(\n{2,})/g</span>, <span class="hljs-string">'\n\n'</span>
<span class="hljs-built_in">console</span>.log <span class="hljs-string">"docco: <span class="hljs-subst">#{source}</span> -> <span class="hljs-subst">#{destination source}</span>"</span>
fs.writeFileSync destination(source), code</pre></div></div>
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<h2 id="configuration">Configuration</h2>
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<p>Default configuration <strong>options</strong>. All of these may be extended by
user-specified options.</p>
</div>
<div class="content"><div class='highlight'><pre>defaults =
<span class="hljs-attribute">layout</span>: <span class="hljs-string">'parallel'</span>
<span class="hljs-attribute">output</span>: <span class="hljs-string">'docs'</span>
<span class="hljs-attribute">template</span>: <span class="hljs-literal">null</span>
<span class="hljs-attribute">css</span>: <span class="hljs-literal">null</span>
<span class="hljs-attribute">extension</span>: <span class="hljs-literal">null</span>
<span class="hljs-attribute">languages</span>: {}
<span class="hljs-attribute">source</span>: <span class="hljs-literal">null</span>
<span class="hljs-attribute">blocks</span>: <span class="hljs-literal">false</span>
<span class="hljs-attribute">marked_options</span>: {
<span class="hljs-attribute">gfm</span>: <span class="hljs-literal">true</span>,
<span class="hljs-attribute">tables</span>: <span class="hljs-literal">true</span>,
<span class="hljs-attribute">breaks</span>: <span class="hljs-literal">false</span>,
<span class="hljs-attribute">pedantic</span>: <span class="hljs-literal">false</span>,
<span class="hljs-attribute">sanitize</span>: <span class="hljs-literal">false</span>,
<span class="hljs-attribute">smartLists</span>: <span class="hljs-literal">true</span>,
<span class="hljs-attribute">smartypants</span>: <span class="hljs-literal">yes</span>,
<span class="hljs-attribute">langPrefix</span>: <span class="hljs-string">'language-'</span>,
<span class="hljs-attribute">highlight</span>: <span class="hljs-function"><span class="hljs-params">(code, lang)</span> -></span>
code
}</pre></div></div>
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<p><strong>Configure</strong> this particular run of Docco. We might use a passed-in external
template, or one of the built-in <strong>layouts</strong>. We only attempt to process
source files for languages for which we have definitions.</p>
</div>
<div class="content"><div class='highlight'><pre><span class="hljs-function"><span class="hljs-title">configure</span> = <span class="hljs-params">(options)</span> -></span>
config = _.extend {}, defaults, _.pick(options, _.keys(defaults)...)
config.languages = buildMatchers config.languages</pre></div></div>
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<p>The user is able to override the layout file used with the <code>--template</code> parameter.
In this case, it is also necessary to explicitly specify a stylesheet file.
These custom templates are compiled exactly like the predefined ones, but the <code>public</code> folder
is only copied for the latter.</p>
</div>
<div class="content"><div class='highlight'><pre> <span class="hljs-keyword">if</span> options.template
<span class="hljs-keyword">unless</span> options.css
<span class="hljs-built_in">console</span>.warn <span class="hljs-string">"docco: no stylesheet file specified"</span>
config.layout = <span class="hljs-literal">null</span>
<span class="hljs-keyword">else</span>
dir = config.layout = path.join __dirname, <span class="hljs-string">'resources'</span>, config.layout
config.public = path.join dir, <span class="hljs-string">'public'</span> <span class="hljs-keyword">if</span> fs.existsSync path.join dir, <span class="hljs-string">'public'</span>
config.template = path.join dir, <span class="hljs-string">'docco.jst'</span>
config.css = options.css <span class="hljs-keyword">or</span> path.join dir, <span class="hljs-string">'resources/parallel/docco.css'</span>
config.template = _.template fs.readFileSync(config.template).toString()</pre></div></div>
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<p>When the user specifies custom Marked options in a (JSON-formatted) configuration file,
mix those options which our defaults such that each default option remains active when it has
not been explicitly overridden by the user.</p>
</div>
<div class="content"><div class='highlight'><pre> <span class="hljs-keyword">if</span> options.marked_options
config.marked_options = _.extend config.marked_options, JSON.parse fs.readFileSync(options.marked_options)
config.sources = options.args.filter(<span class="hljs-function"><span class="hljs-params">(source)</span> -></span>
lang = getLanguage source, config
<span class="hljs-built_in">console</span>.warn <span class="hljs-string">"docco: skipped unknown type (<span class="hljs-subst">#{path.basename source}</span>)"</span> <span class="hljs-keyword">unless</span> lang
lang
).sort()
config</pre></div></div>
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<h2 id="helpers-initial-setup">Helpers & Initial Setup</h2>
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<p>Require our external dependencies.</p>
</div>
<div class="content"><div class='highlight'><pre>_ = <span class="hljs-built_in">require</span> <span class="hljs-string">'underscore'</span>
fs = <span class="hljs-built_in">require</span> <span class="hljs-string">'fs-extra'</span>
path = <span class="hljs-built_in">require</span> <span class="hljs-string">'path'</span>
marked = <span class="hljs-built_in">require</span> <span class="hljs-string">'marked'</span>
commander = <span class="hljs-built_in">require</span> <span class="hljs-string">'commander'</span>
highlightjs = <span class="hljs-built_in">require</span> <span class="hljs-string">'highlight.js'</span></pre></div></div>
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<p>Languages are stored in JSON in the file <code>resources/languages.json</code>.
Each item maps the file extension to the name of the language and the
<code>symbol</code> that indicates a line comment. To add support for a new programming
language to Docco, just add it to the file.</p>
</div>
<div class="content"><div class='highlight'><pre>languages = JSON.parse fs.readFileSync(path.join(__dirname, <span class="hljs-string">'resources'</span>, <span class="hljs-string">'languages.json'</span>))</pre></div></div>
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<p>Build out the appropriate matchers and delimiters for each language.</p>
</div>
<div class="content"><div class='highlight'><pre><span class="hljs-function"><span class="hljs-title">buildMatchers</span> = <span class="hljs-params">(languages)</span> -></span>
<span class="hljs-keyword">for</span> ext, l <span class="hljs-keyword">of</span> languages</pre></div></div>
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<p>Does the line begin with a comment?</p>
</div>
<div class="content"><div class='highlight'><pre> <span class="hljs-keyword">if</span> (l.symbol)
l.commentMatcher = <span class="hljs-regexp">///^\s*<span class="hljs-subst">#{l.symbol}</span>\s?///</span></pre></div></div>
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<p>Support block comment parsing?</p>
</div>
<div class="content"><div class='highlight'><pre> <span class="hljs-keyword">if</span> l.enter <span class="hljs-keyword">and</span> l.exit
l.blocks = <span class="hljs-literal">true</span>
l.commentEnter = <span class="hljs-keyword">new</span> RegExp(l.enter)
l.commentExit = <span class="hljs-keyword">new</span> RegExp(l.exit)
<span class="hljs-keyword">if</span> (l.next)
l.commentNext = <span class="hljs-keyword">new</span> RegExp(l.next)
<span class="hljs-keyword">if</span> l.param
l.commentParam = <span class="hljs-keyword">new</span> RegExp(l.param)</pre></div></div>
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<p>Ignore <a href="http://en.wikipedia.org/wiki/Shebang_%28Unix%29">hashbangs</a> and interpolations…</p>
</div>
<div class="content"><div class='highlight'><pre> l.commentFilter = <span class="hljs-regexp">/(^#![/</span>]|^\s*<span class="hljs-comment">#\{)/</span></pre></div></div>
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<p>We ignore any comments which start with a colon ‘:’ - these will be included in the code as is.</p>
</div>
<div class="content"><div class='highlight'><pre> l.commentIgnore = <span class="hljs-keyword">new</span> RegExp(<span class="hljs-regexp">/^:/</span>)
languages
languages = buildMatchers languages</pre></div></div>
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<p>A function to get the current language we’re documenting, based on the
file extension. Detect and tag “literate” <code>.ext.md</code> variants.</p>
</div>
<div class="content"><div class='highlight'><pre><span class="hljs-function"><span class="hljs-title">getLanguage</span> = <span class="hljs-params">(source, config)</span> -></span>
ext = config.extension <span class="hljs-keyword">or</span> path.extname(source) <span class="hljs-keyword">or</span> path.basename(source)
lang = config.languages?[ext] <span class="hljs-keyword">or</span> languages[ext] <span class="hljs-keyword">or</span> languages[<span class="hljs-string">'text'</span>]
<span class="hljs-keyword">if</span> lang
<span class="hljs-keyword">if</span> lang.name <span class="hljs-keyword">is</span> <span class="hljs-string">'markdown'</span>
codeExt = path.extname(path.basename(source, ext))
<span class="hljs-keyword">if</span> codeExt <span class="hljs-keyword">and</span> codeLang = languages[codeExt]
lang = _.extend {}, codeLang, {<span class="hljs-attribute">literate</span>: <span class="hljs-literal">yes</span>, <span class="hljs-attribute">source</span>: <span class="hljs-string">''</span>}
<span class="hljs-keyword">else</span> <span class="hljs-keyword">if</span> <span class="hljs-keyword">not</span> lang.source
lang.source = ext
lang</pre></div></div>
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<p>Keep it DRY. Extract the docco <strong>version</strong> from <code>package.json</code></p>
</div>
<div class="content"><div class='highlight'><pre>version = JSON.parse(fs.readFileSync(path.join(__dirname, <span class="hljs-string">'package.json'</span>))).version</pre></div></div>
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</div>