PowerShell: Check whether a Windows command or executable is available

In one of my recent PowerShell scripts I needed to find out if certain commands (in my case „svn“, „git“, „ant“ and „mvn“) were available or not. I wrote this small function that tries to call the given command and returns whether it is callable.

  1. function commandAvailable($cmd, $options)
  2. {
  3.   $error.clear();
  4.   $ErrorActionPreference = "silentlycontinue";  
  5.   & $cmd $options | out-null;
  6.   if ($error[0])
  7.   {
  8.     write-host ("Command " + $cmd + " " + $options + " is not available") -foregroundcolor "red";
  9.     return $false;
  10.   }
  11.   return $true;
  12. }
  13.  
  14. write-host (commandAvailable "svn" "–version");

Über uns Stefan

Polyglot Clean Code Developer

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