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    <li ><a href="#method-i-5B-5D">#[]</a>
    
    <li ><a href="#method-i-command_names">#command_names</a>
    
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    <li ><a href="#method-i-find_command">#find_command</a>
    
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<main role="main" aria-labelledby="class-Gem::CommandManager">
  <h1 id="class-Gem::CommandManager" class="class">
    class Gem::CommandManager
  </h1>

  <section class="description">
    
<p>The command manager registers and installs all the individual sub-commands supported by the gem command.</p>

<p>Extra commands can be provided by writing a rubygems_plugin.rb file in an installed gem.  You should register your command against the <a href="CommandManager.html"><code>Gem::CommandManager</code></a> instance, like this:</p>

<pre class="ruby"><span class="ruby-comment"># file rubygems_plugin.rb</span>
<span class="ruby-identifier">require</span> <span class="ruby-string">&#39;rubygems/command_manager&#39;</span>

<span class="ruby-constant">Gem</span><span class="ruby-operator">::</span><span class="ruby-constant">CommandManager</span>.<span class="ruby-identifier">instance</span>.<span class="ruby-identifier">register_command</span> <span class="ruby-value">:edit</span>
</pre>

<p>You should put the implementation of your command in rubygems/commands.</p>

<pre class="ruby"><span class="ruby-comment"># file rubygems/commands/edit_command.rb</span>
<span class="ruby-keyword">class</span> <span class="ruby-constant">Gem</span><span class="ruby-operator">::</span><span class="ruby-constant">Commands</span><span class="ruby-operator">::</span><span class="ruby-constant">EditCommand</span> <span class="ruby-operator">&lt;</span> <span class="ruby-constant">Gem</span><span class="ruby-operator">::</span><span class="ruby-constant">Command</span>
  <span class="ruby-comment"># ...</span>
<span class="ruby-keyword">end</span>
</pre>

<p>See <a href="Command.html"><code>Gem::Command</code></a> for instructions on writing gem commands.</p>

  </section>

  
  <section id="5Buntitled-5D" class="documentation-section">
    

    

    
    <section class="constants-list">
      <header>
        <h3>Constants</h3>
      </header>
      <dl>
      
        <dt id="ALIAS_COMMANDS">ALIAS_COMMANDS
        
        <dd>
        
      
      </dl>
    </section>
    

    

    
     <section id="public-class-5Buntitled-5D-method-details" class="method-section">
       <header>
         <h3>Public Class Methods</h3>
       </header>

    
      <div id="method-c-instance" class="method-detail ">
        
        <div class="method-heading">
          <span class="method-name">instance</span><span
            class="method-args">()</span>
          
          <span class="method-click-advice">click to toggle source</span>
          
        </div>
        

        <div class="method-description">
          
          <p>Return the authoritative instance of the command manager.</p>
          
          

          
          <div class="method-source-code" id="instance-source">
            <pre><span class="ruby-comment"># File lib/rubygems/command_manager.rb, line 83</span>
<span class="ruby-keyword">def</span> <span class="ruby-keyword">self</span>.<span class="ruby-identifier ruby-title">instance</span>
  <span class="ruby-ivar">@command_manager</span> <span class="ruby-operator">||=</span> <span class="ruby-identifier">new</span>
<span class="ruby-keyword">end</span></pre>
          </div>
          
        </div>

        

        
      </div>

    
      <div id="method-c-new" class="method-detail ">
        
        <div class="method-heading">
          <span class="method-name">new</span><span
            class="method-args">()</span>
          
          <span class="method-click-advice">click to toggle source</span>
          
        </div>
        

        <div class="method-description">
          
          <p>Register all the subcommands supported by the gem command.</p>
          
          

          
          <div class="method-source-code" id="new-source">
            <pre><span class="ruby-comment"># File lib/rubygems/command_manager.rb, line 105</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">initialize</span>
  <span class="ruby-identifier">require</span> <span class="ruby-string">&#39;timeout&#39;</span>
  <span class="ruby-ivar">@commands</span> = {}

  <span class="ruby-constant">BUILTIN_COMMANDS</span>.<span class="ruby-identifier">each</span> <span class="ruby-keyword">do</span> <span class="ruby-operator">|</span><span class="ruby-identifier">name</span><span class="ruby-operator">|</span>
    <span class="ruby-identifier">register_command</span> <span class="ruby-identifier">name</span>
  <span class="ruby-keyword">end</span>
<span class="ruby-keyword">end</span></pre>
          </div>
          
        </div>

        

        
      </div>

    
      <div id="method-c-reset" class="method-detail ">
        
        <div class="method-heading">
          <span class="method-name">reset</span><span
            class="method-args">()</span>
          
          <span class="method-click-advice">click to toggle source</span>
          
        </div>
        

        <div class="method-description">
          
          <p>Reset the authoritative instance of the command manager.</p>
          
          

          
          <div class="method-source-code" id="reset-source">
            <pre><span class="ruby-comment"># File lib/rubygems/command_manager.rb, line 98</span>
<span class="ruby-keyword">def</span> <span class="ruby-keyword">self</span>.<span class="ruby-identifier ruby-title">reset</span>
  <span class="ruby-ivar">@command_manager</span> = <span class="ruby-keyword">nil</span>
<span class="ruby-keyword">end</span></pre>
          </div>
          
        </div>

        

        
      </div>

    
    </section>
  
     <section id="public-instance-5Buntitled-5D-method-details" class="method-section">
       <header>
         <h3>Public Instance Methods</h3>
       </header>

    
      <div id="method-i-5B-5D" class="method-detail ">
        
        <div class="method-heading">
          <span class="method-name">[]</span><span
            class="method-args">(command_name)</span>
          
          <span class="method-click-advice">click to toggle source</span>
          
        </div>
        

        <div class="method-description">
          
          <p>Returns a Command instance for <code>command_name</code></p>
          
          

          
          <div class="method-source-code" id="5B-5D-source">
            <pre><span class="ruby-comment"># File lib/rubygems/command_manager.rb, line 131</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">[]</span>(<span class="ruby-identifier">command_name</span>)
  <span class="ruby-identifier">command_name</span> = <span class="ruby-identifier">command_name</span>.<span class="ruby-identifier">intern</span>
  <span class="ruby-keyword">return</span> <span class="ruby-keyword">nil</span> <span class="ruby-keyword">if</span> <span class="ruby-ivar">@commands</span>[<span class="ruby-identifier">command_name</span>].<span class="ruby-identifier">nil?</span>
  <span class="ruby-ivar">@commands</span>[<span class="ruby-identifier">command_name</span>] <span class="ruby-operator">||=</span> <span class="ruby-identifier">load_and_instantiate</span>(<span class="ruby-identifier">command_name</span>)
<span class="ruby-keyword">end</span></pre>
          </div>
          
        </div>

        

        
      </div>

    
      <div id="method-i-command_names" class="method-detail ">
        
        <div class="method-heading">
          <span class="method-name">command_names</span><span
            class="method-args">()</span>
          
          <span class="method-click-advice">click to toggle source</span>
          
        </div>
        

        <div class="method-description">
          
          <p>Return a sorted list of all command names as strings.</p>
          
          

          
          <div class="method-source-code" id="command_names-source">
            <pre><span class="ruby-comment"># File lib/rubygems/command_manager.rb, line 140</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">command_names</span>
  <span class="ruby-ivar">@commands</span>.<span class="ruby-identifier">keys</span>.<span class="ruby-identifier">collect</span> {<span class="ruby-operator">|</span><span class="ruby-identifier">key</span><span class="ruby-operator">|</span> <span class="ruby-identifier">key</span>.<span class="ruby-identifier">to_s</span>}.<span class="ruby-identifier">sort</span>
<span class="ruby-keyword">end</span></pre>
          </div>
          
        </div>

        

        
      </div>

    
      <div id="method-i-find_alias_command" class="method-detail ">
        
        <div class="method-heading">
          <span class="method-name">find_alias_command</span><span
            class="method-args">(cmd_name)</span>
          
          <span class="method-click-advice">click to toggle source</span>
          
        </div>
        

        <div class="method-description">
          
          
          
          

          
          <div class="method-source-code" id="find_alias_command-source">
            <pre><span class="ruby-comment"># File lib/rubygems/command_manager.rb, line 197</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">find_alias_command</span>(<span class="ruby-identifier">cmd_name</span>)
  <span class="ruby-identifier">alias_name</span> = <span class="ruby-constant">ALIAS_COMMANDS</span>[<span class="ruby-identifier">cmd_name</span>]
  <span class="ruby-identifier">alias_name</span> <span class="ruby-operator">?</span> <span class="ruby-identifier">alias_name</span> <span class="ruby-operator">:</span> <span class="ruby-identifier">cmd_name</span>
<span class="ruby-keyword">end</span></pre>
          </div>
          
        </div>

        

        
      </div>

    
      <div id="method-i-find_command" class="method-detail ">
        
        <div class="method-heading">
          <span class="method-name">find_command</span><span
            class="method-args">(cmd_name)</span>
          
          <span class="method-click-advice">click to toggle source</span>
          
        </div>
        

        <div class="method-description">
          
          
          
          

          
          <div class="method-source-code" id="find_command-source">
            <pre><span class="ruby-comment"># File lib/rubygems/command_manager.rb, line 182</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">find_command</span>(<span class="ruby-identifier">cmd_name</span>)
  <span class="ruby-identifier">cmd_name</span> = <span class="ruby-identifier">find_alias_command</span> <span class="ruby-identifier">cmd_name</span>

  <span class="ruby-identifier">possibilities</span> = <span class="ruby-identifier">find_command_possibilities</span> <span class="ruby-identifier">cmd_name</span>

  <span class="ruby-keyword">if</span> <span class="ruby-identifier">possibilities</span>.<span class="ruby-identifier">size</span> <span class="ruby-operator">&gt;</span> <span class="ruby-value">1</span>
    <span class="ruby-identifier">raise</span> <span class="ruby-constant">Gem</span><span class="ruby-operator">::</span><span class="ruby-constant">CommandLineError</span>,
          <span class="ruby-node">&quot;Ambiguous command #{cmd_name} matches [#{possibilities.join(&#39;, &#39;)}]&quot;</span>
  <span class="ruby-keyword">elsif</span> <span class="ruby-identifier">possibilities</span>.<span class="ruby-identifier">empty?</span>
    <span class="ruby-identifier">raise</span> <span class="ruby-constant">Gem</span><span class="ruby-operator">::</span><span class="ruby-constant">CommandLineError</span>, <span class="ruby-node">&quot;Unknown command #{cmd_name}&quot;</span>
  <span class="ruby-keyword">end</span>

  <span class="ruby-keyword">self</span>[<span class="ruby-identifier">possibilities</span>.<span class="ruby-identifier">first</span>]
<span class="ruby-keyword">end</span></pre>
          </div>
          
        </div>

        

        
      </div>

    
      <div id="method-i-find_command_possibilities" class="method-detail ">
        
        <div class="method-heading">
          <span class="method-name">find_command_possibilities</span><span
            class="method-args">(cmd_name)</span>
          
          <span class="method-click-advice">click to toggle source</span>
          
        </div>
        

        <div class="method-description">
          
          
          
          

          
          <div class="method-source-code" id="find_command_possibilities-source">
            <pre><span class="ruby-comment"># File lib/rubygems/command_manager.rb, line 202</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">find_command_possibilities</span>(<span class="ruby-identifier">cmd_name</span>)
  <span class="ruby-identifier">len</span> = <span class="ruby-identifier">cmd_name</span>.<span class="ruby-identifier">length</span>

  <span class="ruby-identifier">found</span> = <span class="ruby-identifier">command_names</span>.<span class="ruby-identifier">select</span> { <span class="ruby-operator">|</span><span class="ruby-identifier">name</span><span class="ruby-operator">|</span> <span class="ruby-identifier">cmd_name</span> <span class="ruby-operator">==</span> <span class="ruby-identifier">name</span>[<span class="ruby-value">0</span>, <span class="ruby-identifier">len</span>] }

  <span class="ruby-identifier">exact</span> = <span class="ruby-identifier">found</span>.<span class="ruby-identifier">find</span> { <span class="ruby-operator">|</span><span class="ruby-identifier">name</span><span class="ruby-operator">|</span> <span class="ruby-identifier">name</span> <span class="ruby-operator">==</span> <span class="ruby-identifier">cmd_name</span> }

  <span class="ruby-identifier">exact</span> <span class="ruby-operator">?</span> [<span class="ruby-identifier">exact</span>] <span class="ruby-operator">:</span> <span class="ruby-identifier">found</span>
<span class="ruby-keyword">end</span></pre>
          </div>
          
        </div>

        

        
      </div>

    
      <div id="method-i-instance" class="method-detail ">
        
        <div class="method-heading">
          <span class="method-name">instance</span><span
            class="method-args">()</span>
          
          <span class="method-click-advice">click to toggle source</span>
          
        </div>
        

        <div class="method-description">
          
          <p>Returns self. Allows a <a href="CommandManager.html"><code>CommandManager</code></a> instance to stand in for the class itself.</p>
          
          

          
          <div class="method-source-code" id="instance-source">
            <pre><span class="ruby-comment"># File lib/rubygems/command_manager.rb, line 91</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">instance</span>
  <span class="ruby-keyword">self</span>
<span class="ruby-keyword">end</span></pre>
          </div>
          
        </div>

        

        
      </div>

    
      <div id="method-i-process_args" class="method-detail ">
        
        <div class="method-heading">
          <span class="method-name">process_args</span><span
            class="method-args">(args, build_args=nil)</span>
          
          <span class="method-click-advice">click to toggle source</span>
          
        </div>
        

        <div class="method-description">
          
          
          
          

          
          <div class="method-source-code" id="process_args-source">
            <pre><span class="ruby-comment"># File lib/rubygems/command_manager.rb, line 159</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">process_args</span>(<span class="ruby-identifier">args</span>, <span class="ruby-identifier">build_args</span>=<span class="ruby-keyword">nil</span>)
  <span class="ruby-keyword">if</span> <span class="ruby-identifier">args</span>.<span class="ruby-identifier">empty?</span>
    <span class="ruby-identifier">say</span> <span class="ruby-constant">Gem</span><span class="ruby-operator">::</span><span class="ruby-constant">Command</span><span class="ruby-operator">::</span><span class="ruby-constant">HELP</span>
    <span class="ruby-identifier">terminate_interaction</span> <span class="ruby-value">1</span>
  <span class="ruby-keyword">end</span>

  <span class="ruby-keyword">case</span> <span class="ruby-identifier">args</span>.<span class="ruby-identifier">first</span>
  <span class="ruby-keyword">when</span> <span class="ruby-string">&#39;-h&#39;</span>, <span class="ruby-string">&#39;--help&#39;</span> <span class="ruby-keyword">then</span>
    <span class="ruby-identifier">say</span> <span class="ruby-constant">Gem</span><span class="ruby-operator">::</span><span class="ruby-constant">Command</span><span class="ruby-operator">::</span><span class="ruby-constant">HELP</span>
    <span class="ruby-identifier">terminate_interaction</span> <span class="ruby-value">0</span>
  <span class="ruby-keyword">when</span> <span class="ruby-string">&#39;-v&#39;</span>, <span class="ruby-string">&#39;--version&#39;</span> <span class="ruby-keyword">then</span>
    <span class="ruby-identifier">say</span> <span class="ruby-constant">Gem</span><span class="ruby-operator">::</span><span class="ruby-constant">VERSION</span>
    <span class="ruby-identifier">terminate_interaction</span> <span class="ruby-value">0</span>
  <span class="ruby-keyword">when</span> <span class="ruby-regexp">/^-/</span> <span class="ruby-keyword">then</span>
    <span class="ruby-identifier">alert_error</span> <span class="ruby-identifier">clean_text</span>(<span class="ruby-node">&quot;Invalid option: #{args.first}. See &#39;gem --help&#39;.&quot;</span>)
    <span class="ruby-identifier">terminate_interaction</span> <span class="ruby-value">1</span>
  <span class="ruby-keyword">else</span>
    <span class="ruby-identifier">cmd_name</span> = <span class="ruby-identifier">args</span>.<span class="ruby-identifier">shift</span>.<span class="ruby-identifier">downcase</span>
    <span class="ruby-identifier">cmd</span> = <span class="ruby-identifier">find_command</span> <span class="ruby-identifier">cmd_name</span>
    <span class="ruby-identifier">cmd</span>.<span class="ruby-identifier">invoke_with_build_args</span> <span class="ruby-identifier">args</span>, <span class="ruby-identifier">build_args</span>
  <span class="ruby-keyword">end</span>
<span class="ruby-keyword">end</span></pre>
          </div>
          
        </div>

        

        
      </div>

    
      <div id="method-i-register_command" class="method-detail ">
        
        <div class="method-heading">
          <span class="method-name">register_command</span><span
            class="method-args">(command, obj=false)</span>
          
          <span class="method-click-advice">click to toggle source</span>
          
        </div>
        

        <div class="method-description">
          
          <p>Register the <a href="../Symbol.html"><code>Symbol</code></a> <code>command</code> as a gem command.</p>
          
          

          
          <div class="method-source-code" id="register_command-source">
            <pre><span class="ruby-comment"># File lib/rubygems/command_manager.rb, line 117</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">register_command</span>(<span class="ruby-identifier">command</span>, <span class="ruby-identifier">obj</span>=<span class="ruby-keyword">false</span>)
  <span class="ruby-ivar">@commands</span>[<span class="ruby-identifier">command</span>] = <span class="ruby-identifier">obj</span>
<span class="ruby-keyword">end</span></pre>
          </div>
          
        </div>

        

        
      </div>

    
      <div id="method-i-run" class="method-detail ">
        
        <div class="method-heading">
          <span class="method-name">run</span><span
            class="method-args">(args, build_args=nil)</span>
          
          <span class="method-click-advice">click to toggle source</span>
          
        </div>
        

        <div class="method-description">
          
          <p>Run the command specified by <code>args</code>.</p>
          
          

          
          <div class="method-source-code" id="run-source">
            <pre><span class="ruby-comment"># File lib/rubygems/command_manager.rb, line 147</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">run</span>(<span class="ruby-identifier">args</span>, <span class="ruby-identifier">build_args</span>=<span class="ruby-keyword">nil</span>)
  <span class="ruby-identifier">process_args</span>(<span class="ruby-identifier">args</span>, <span class="ruby-identifier">build_args</span>)
<span class="ruby-keyword">rescue</span> <span class="ruby-constant">StandardError</span>, <span class="ruby-constant">Timeout</span><span class="ruby-operator">::</span><span class="ruby-constant">Error</span> <span class="ruby-operator">=&gt;</span> <span class="ruby-identifier">ex</span>
  <span class="ruby-identifier">alert_error</span> <span class="ruby-identifier">clean_text</span>(<span class="ruby-node">&quot;While executing gem ... (#{ex.class})\n    #{ex}&quot;</span>)
  <span class="ruby-identifier">ui</span>.<span class="ruby-identifier">backtrace</span> <span class="ruby-identifier">ex</span>

  <span class="ruby-identifier">terminate_interaction</span>(<span class="ruby-value">1</span>)
<span class="ruby-keyword">rescue</span> <span class="ruby-constant">Interrupt</span>
  <span class="ruby-identifier">alert_error</span> <span class="ruby-identifier">clean_text</span>(<span class="ruby-string">&quot;Interrupted&quot;</span>)
  <span class="ruby-identifier">terminate_interaction</span>(<span class="ruby-value">1</span>)
<span class="ruby-keyword">end</span></pre>
          </div>
          
        </div>

        

        
      </div>

    
      <div id="method-i-unregister_command" class="method-detail ">
        
        <div class="method-heading">
          <span class="method-name">unregister_command</span><span
            class="method-args">(command)</span>
          
          <span class="method-click-advice">click to toggle source</span>
          
        </div>
        

        <div class="method-description">
          
          <p>Unregister the <a href="../Symbol.html"><code>Symbol</code></a> <code>command</code> as a gem command.</p>
          
          

          
          <div class="method-source-code" id="unregister_command-source">
            <pre><span class="ruby-comment"># File lib/rubygems/command_manager.rb, line 124</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">unregister_command</span>(<span class="ruby-identifier">command</span>)
  <span class="ruby-ivar">@commands</span>.<span class="ruby-identifier">delete</span> <span class="ruby-identifier">command</span>
<span class="ruby-keyword">end</span></pre>
          </div>
          
        </div>

        

        
      </div>

    
    </section>
  
     <section id="private-instance-5Buntitled-5D-method-details" class="method-section">
       <header>
         <h3>Private Instance Methods</h3>
       </header>

    
      <div id="method-i-load_and_instantiate" class="method-detail ">
        
        <div class="method-heading">
          <span class="method-name">load_and_instantiate</span><span
            class="method-args">(command_name)</span>
          
          <span class="method-click-advice">click to toggle source</span>
          
        </div>
        

        <div class="method-description">
          
          
          
          

          
          <div class="method-source-code" id="load_and_instantiate-source">
            <pre><span class="ruby-comment"># File lib/rubygems/command_manager.rb, line 214</span>
<span class="ruby-keyword">def</span> <span class="ruby-identifier ruby-title">load_and_instantiate</span>(<span class="ruby-identifier">command_name</span>)
  <span class="ruby-identifier">command_name</span> = <span class="ruby-identifier">command_name</span>.<span class="ruby-identifier">to_s</span>
  <span class="ruby-identifier">const_name</span> = <span class="ruby-identifier">command_name</span>.<span class="ruby-identifier">capitalize</span>.<span class="ruby-identifier">gsub</span>(<span class="ruby-regexp">/_(.)/</span>) { <span class="ruby-node">$1</span>.<span class="ruby-identifier">upcase</span> } <span class="ruby-operator">&lt;&lt;</span> <span class="ruby-string">&quot;Command&quot;</span>
  <span class="ruby-identifier">load_error</span> = <span class="ruby-keyword">nil</span>

  <span class="ruby-keyword">begin</span>
    <span class="ruby-keyword">begin</span>
      <span class="ruby-identifier">require</span> <span class="ruby-node">&quot;rubygems/commands/#{command_name}_command&quot;</span>
    <span class="ruby-keyword">rescue</span> <span class="ruby-constant">LoadError</span> <span class="ruby-operator">=&gt;</span> <span class="ruby-identifier">e</span>
      <span class="ruby-identifier">load_error</span> = <span class="ruby-identifier">e</span>
    <span class="ruby-keyword">end</span>
    <span class="ruby-constant">Gem</span><span class="ruby-operator">::</span><span class="ruby-constant">Commands</span>.<span class="ruby-identifier">const_get</span>(<span class="ruby-identifier">const_name</span>).<span class="ruby-identifier">new</span>
  <span class="ruby-keyword">rescue</span> <span class="ruby-constant">Exception</span> <span class="ruby-operator">=&gt;</span> <span class="ruby-identifier">e</span>
    <span class="ruby-identifier">e</span> = <span class="ruby-identifier">load_error</span> <span class="ruby-keyword">if</span> <span class="ruby-identifier">load_error</span>

    <span class="ruby-identifier">alert_error</span> <span class="ruby-identifier">clean_text</span>(<span class="ruby-node">&quot;Loading command: #{command_name} (#{e.class})\n\t#{e}&quot;</span>)
    <span class="ruby-identifier">ui</span>.<span class="ruby-identifier">backtrace</span> <span class="ruby-identifier">e</span>
  <span class="ruby-keyword">end</span>
<span class="ruby-keyword">end</span></pre>
          </div>
          
        </div>

        

        
      </div>

    
    </section>
  
  </section>

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