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<!DOCTYPE html> <html> <head> <title>pkginfo.js</title> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <link rel="stylesheet" media="all" href="docco.css" /> </head> <body> <div id="container"> <div id="background"></div> <table cellpadding="0" cellspacing="0"> <thead> <tr> <th class="docs"> <h1> pkginfo.js </h1> </th> <th class="code"> </th> </tr> </thead> <tbody> <tr id="section-1"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-1">&#182;</a> </div> </td> <td class="code"> <div class="highlight"><pre><span class="cm">/*</span>
<span class="cm"> * pkginfo.js: Top-level include for the pkginfo module</span>
<span class="cm"> *</span>
<span class="cm"> * (C) 2011, Charlie Robbins</span>
<span class="cm"> *</span>
<span class="cm"> */</span>
<span class="kd">var</span> <span class="nx">fs</span> <span class="o">=</span> <span class="nx">require</span><span class="p">(</span><span class="s1">&#39;fs&#39;</span><span class="p">),</span>
<span class="nx">path</span> <span class="o">=</span> <span class="nx">require</span><span class="p">(</span><span class="s1">&#39;path&#39;</span><span class="p">);</span></pre></div> </td> </tr> <tr id="section-2"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-2">&#182;</a> </div> <h3>function pkginfo ([options, 'property', 'property' ..])</h3>
<h4>@pmodule {Module} Parent module to read from.</h4>
<h4>@options {Object|Array|string} <strong>Optional</strong> Options used when exposing properties.</h4>
<h4>@arguments {string...} <strong>Optional</strong> Specified properties to expose.</h4>
<p>Exposes properties from the package.json file for the parent module on
it's exports. Valid usage:</p>
<p><code>require('pkginfo')()</code></p>
<p><code>require('pkginfo')('version', 'author');</code></p>
<p><code>require('pkginfo')(['version', 'author']);</code></p>
<p><code>require('pkginfo')({ include: ['version', 'author'] });</code></p> </td> <td class="code"> <div class="highlight"><pre><span class="kd">var</span> <span class="nx">pkginfo</span> <span class="o">=</span> <span class="nx">module</span><span class="p">.</span><span class="nx">exports</span> <span class="o">=</span> <span class="kd">function</span> <span class="p">(</span><span class="nx">pmodule</span><span class="p">,</span> <span class="nx">options</span><span class="p">)</span> <span class="p">{</span>
<span class="kd">var</span> <span class="nx">args</span> <span class="o">=</span> <span class="p">[].</span><span class="nx">slice</span><span class="p">.</span><span class="nx">call</span><span class="p">(</span><span class="nx">arguments</span><span class="p">,</span> <span class="mi">2</span><span class="p">).</span><span class="nx">filter</span><span class="p">(</span><span class="kd">function</span> <span class="p">(</span><span class="nx">arg</span><span class="p">)</span> <span class="p">{</span>
<span class="k">return</span> <span class="k">typeof</span> <span class="nx">arg</span> <span class="o">===</span> <span class="s1">&#39;string&#39;</span><span class="p">;</span>
<span class="p">});</span>
</pre></div> </td> </tr> <tr id="section-3"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-3">&#182;</a> </div> <p><strong>Parse variable arguments</strong></p> </td> <td class="code"> <div class="highlight"><pre> <span class="k">if</span> <span class="p">(</span><span class="nb">Array</span><span class="p">.</span><span class="nx">isArray</span><span class="p">(</span><span class="nx">options</span><span class="p">))</span> <span class="p">{</span></pre></div> </td> </tr> <tr id="section-4"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-4">&#182;</a> </div> <p>If the options passed in is an Array assume that
it is the Array of properties to expose from the
on the package.json file on the parent module.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="nx">options</span> <span class="o">=</span> <span class="p">{</span> <span class="nx">include</span><span class="o">:</span> <span class="nx">options</span> <span class="p">};</span>
<span class="p">}</span>
<span class="k">else</span> <span class="k">if</span> <span class="p">(</span><span class="k">typeof</span> <span class="nx">options</span> <span class="o">===</span> <span class="s1">&#39;string&#39;</span><span class="p">)</span> <span class="p">{</span></pre></div> </td> </tr> <tr id="section-5"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-5">&#182;</a> </div> <p>Otherwise if the first argument is a string, then
assume that it is the first property to expose from
the package.json file on the parent module.</p> </td> <td class="code"> <div class="highlight"><pre> <span class="nx">options</span> <span class="o">=</span> <span class="p">{</span> <span class="nx">include</span><span class="o">:</span> <span class="p">[</span><span class="nx">options</span><span class="p">]</span> <span class="p">};</span>
<span class="p">}</span>
</pre></div> </td> </tr> <tr id="section-6"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-6">&#182;</a> </div> <p><strong>Setup default options</strong></p> </td> <td class="code"> <div class="highlight"><pre> <span class="nx">options</span> <span class="o">=</span> <span class="nx">options</span> <span class="o">||</span> <span class="p">{</span> <span class="nx">include</span><span class="o">:</span> <span class="p">[]</span> <span class="p">};</span>
<span class="k">if</span> <span class="p">(</span><span class="nx">args</span><span class="p">.</span><span class="nx">length</span> <span class="o">&gt;</span> <span class="mi">0</span><span class="p">)</span> <span class="p">{</span></pre></div> </td> </tr> <tr id="section-7"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-7">&#182;</a> </div> <p>If additional string arguments have been passed in
then add them to the properties to expose on the
parent module. </p> </td> <td class="code"> <div class="highlight"><pre> <span class="nx">options</span><span class="p">.</span><span class="nx">include</span> <span class="o">=</span> <span class="nx">options</span><span class="p">.</span><span class="nx">include</span><span class="p">.</span><span class="nx">concat</span><span class="p">(</span><span class="nx">args</span><span class="p">);</span>
<span class="p">}</span>
<span class="kd">var</span> <span class="nx">pkg</span> <span class="o">=</span> <span class="nx">pkginfo</span><span class="p">.</span><span class="nx">read</span><span class="p">(</span><span class="nx">pmodule</span><span class="p">,</span> <span class="nx">options</span><span class="p">.</span><span class="nx">dir</span><span class="p">).</span><span class="kr">package</span><span class="p">;</span>
<span class="nb">Object</span><span class="p">.</span><span class="nx">keys</span><span class="p">(</span><span class="nx">pkg</span><span class="p">).</span><span class="nx">forEach</span><span class="p">(</span><span class="kd">function</span> <span class="p">(</span><span class="nx">key</span><span class="p">)</span> <span class="p">{</span>
<span class="k">if</span> <span class="p">(</span><span class="nx">options</span><span class="p">.</span><span class="nx">include</span><span class="p">.</span><span class="nx">length</span> <span class="o">&gt;</span> <span class="mi">0</span> <span class="o">&amp;&amp;</span> <span class="o">!~</span><span class="nx">options</span><span class="p">.</span><span class="nx">include</span><span class="p">.</span><span class="nx">indexOf</span><span class="p">(</span><span class="nx">key</span><span class="p">))</span> <span class="p">{</span>
<span class="k">return</span><span class="p">;</span>
<span class="p">}</span>
<span class="k">if</span> <span class="p">(</span><span class="o">!</span><span class="nx">pmodule</span><span class="p">.</span><span class="nx">exports</span><span class="p">[</span><span class="nx">key</span><span class="p">])</span> <span class="p">{</span>
<span class="nx">pmodule</span><span class="p">.</span><span class="nx">exports</span><span class="p">[</span><span class="nx">key</span><span class="p">]</span> <span class="o">=</span> <span class="nx">pkg</span><span class="p">[</span><span class="nx">key</span><span class="p">];</span>
<span class="p">}</span>
<span class="p">});</span>
<span class="k">return</span> <span class="nx">pkginfo</span><span class="p">;</span>
<span class="p">};</span></pre></div> </td> </tr> <tr id="section-8"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-8">&#182;</a> </div> <h3>function find (dir)</h3>
<h4>@pmodule {Module} Parent module to read from.</h4>
<h4>@dir {string} <strong>Optional</strong> Directory to start search from.</h4>
<p>Searches up the directory tree from <code>dir</code> until it finds a directory
which contains a <code>package.json</code> file. </p> </td> <td class="code"> <div class="highlight"><pre><span class="nx">pkginfo</span><span class="p">.</span><span class="nx">find</span> <span class="o">=</span> <span class="kd">function</span> <span class="p">(</span><span class="nx">pmodule</span><span class="p">,</span> <span class="nx">dir</span><span class="p">)</span> <span class="p">{</span>
<span class="nx">dir</span> <span class="o">=</span> <span class="nx">dir</span> <span class="o">||</span> <span class="nx">pmodule</span><span class="p">.</span><span class="nx">filename</span><span class="p">;</span>
<span class="nx">dir</span> <span class="o">=</span> <span class="nx">path</span><span class="p">.</span><span class="nx">dirname</span><span class="p">(</span><span class="nx">dir</span><span class="p">);</span>
<span class="kd">var</span> <span class="nx">files</span> <span class="o">=</span> <span class="nx">fs</span><span class="p">.</span><span class="nx">readdirSync</span><span class="p">(</span><span class="nx">dir</span><span class="p">);</span>
<span class="k">if</span> <span class="p">(</span><span class="o">~</span><span class="nx">files</span><span class="p">.</span><span class="nx">indexOf</span><span class="p">(</span><span class="s1">&#39;package.json&#39;</span><span class="p">))</span> <span class="p">{</span>
<span class="k">return</span> <span class="nx">path</span><span class="p">.</span><span class="nx">join</span><span class="p">(</span><span class="nx">dir</span><span class="p">,</span> <span class="s1">&#39;package.json&#39;</span><span class="p">);</span>
<span class="p">}</span>
<span class="k">if</span> <span class="p">(</span><span class="nx">dir</span> <span class="o">===</span> <span class="s1">&#39;/&#39;</span><span class="p">)</span> <span class="p">{</span>
<span class="k">throw</span> <span class="k">new</span> <span class="nb">Error</span><span class="p">(</span><span class="s1">&#39;Could not find package.json up from: &#39;</span> <span class="o">+</span> <span class="nx">dir</span><span class="p">);</span>
<span class="p">}</span>
<span class="k">return</span> <span class="nx">pkginfo</span><span class="p">.</span><span class="nx">find</span><span class="p">(</span><span class="nx">dir</span><span class="p">);</span>
<span class="p">};</span></pre></div> </td> </tr> <tr id="section-9"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-9">&#182;</a> </div> <h3>function read (pmodule, dir)</h3>
<h4>@pmodule {Module} Parent module to read from.</h4>
<h4>@dir {string} <strong>Optional</strong> Directory to start search from.</h4>
<p>Searches up the directory tree from <code>dir</code> until it finds a directory
which contains a <code>package.json</code> file and returns the package information.</p> </td> <td class="code"> <div class="highlight"><pre><span class="nx">pkginfo</span><span class="p">.</span><span class="nx">read</span> <span class="o">=</span> <span class="kd">function</span> <span class="p">(</span><span class="nx">pmodule</span><span class="p">,</span> <span class="nx">dir</span><span class="p">)</span> <span class="p">{</span>
<span class="nx">dir</span> <span class="o">=</span> <span class="nx">pkginfo</span><span class="p">.</span><span class="nx">find</span><span class="p">(</span><span class="nx">pmodule</span><span class="p">,</span> <span class="nx">dir</span><span class="p">);</span>
<span class="kd">var</span> <span class="nx">data</span> <span class="o">=</span> <span class="nx">fs</span><span class="p">.</span><span class="nx">readFileSync</span><span class="p">(</span><span class="nx">dir</span><span class="p">).</span><span class="nx">toString</span><span class="p">();</span>
<span class="k">return</span> <span class="p">{</span>
<span class="nx">dir</span><span class="o">:</span> <span class="nx">dir</span><span class="p">,</span>
<span class="kr">package</span><span class="o">:</span> <span class="nx">JSON</span><span class="p">.</span><span class="nx">parse</span><span class="p">(</span><span class="nx">data</span><span class="p">)</span>
<span class="p">};</span>
<span class="p">};</span></pre></div> </td> </tr> <tr id="section-10"> <td class="docs"> <div class="pilwrap"> <a class="pilcrow" href="#section-10">&#182;</a> </div> <p>Call <code>pkginfo</code> on this module and expose version.</p> </td> <td class="code"> <div class="highlight"><pre><span class="nx">pkginfo</span><span class="p">(</span><span class="nx">module</span><span class="p">,</span> <span class="p">{</span>
<span class="nx">dir</span><span class="o">:</span> <span class="nx">__dirname</span><span class="p">,</span>
<span class="nx">include</span><span class="o">:</span> <span class="p">[</span><span class="s1">&#39;version&#39;</span><span class="p">],</span>
<span class="nx">target</span><span class="o">:</span> <span class="nx">pkginfo</span>
<span class="p">});</span>
</pre></div> </td> </tr> </tbody> </table> </div> </body> </html>