="type"></code>command</span> = <code class="type">string list</code> </pre>
<div class="info ">
a command is a list of words<br>
</div>


<pre><span id="VALcommand_exists"><span class="keyword">val</span> command_exists</span> : <code class="type">?env:string array -> string -> bool</code></pre><div class="info ">
Test wether a command exists in the environment.<br>
</div>

<pre><span id="VALcommand"><span class="keyword">val</span> command</span> : <code class="type">?verbose:bool -><br>       ?env:string