gistfile1.aw

#!/usr/bin/php -q
<?php
    
$list = shell_exec("gem list");
    
foreach (split("\n", $list) as $line)
{   
  $entries = split(" ", $line);
    
  $program = $entries[0];
    
  if (strlen($program) == 0)
        continue;
    
  $versions = split(",", substr($line, strpos($line, "(") + 1, strpos($line, ")") - (strpos($line, "(") + 1)));
    
  foreach ($versions as $version)
  { 
        $version = trim($version);
        echo "gem install $program -v $version", "\n";
  } 
}   
    
?>