compress.js.pl

%jswNamesMap    = '';
$jswNamesCount  = 0;
%privNamesMap   = '';
$privNamesCount = 0;
$tmpOut         = '';
$out            = '';

open (LOG, ">/tmp/jscompress.log") || warn "Could not open /tmp/jscompress.log file for logging!";

while (<>) {
      # Record _GLOB_ global variables and map them to _jw_0, _jw_1, ...
   while (/(_GLOB_\w+)/isg) {
      if (!$jswNamesMap{$1}) {
         $jswNamesMap{$1} = "_jw_".$jswNamesCount;
         $jswNamesCount++;
      }
   }

   while (/(_PRIV_\w+)/isg) {
      if (!$privNamesMap{$1}) {
         $privNamesMap{$1} = "_v".$privNamesCount;
         $privNamesCount++;
      }
   }

      # Last thing to do ... Record if non-empty
   if ($_) {
      $tmpOut .= $_;
   }
}

$out = $tmpOut;

   # Replace all global long GLOB_ names with short _jw_ variables
for $k (keys  %jswNamesMap) {
   print LOG "REPLACING '$k' with '".$jswNamesMap{$k}."'\n";
   $out =~ s/([^\w_])$k([^\w\d_])/$1$jswNamesMap{$k}$2/isg;
}

   # Replace all private _PRIV_ names with short _v variables
for $k (keys  %privNamesMap) {
   print LOG "REPLACING '$k' with '".$privNamesMap{$k}."'\n";
   $out =~ s/([^\w_])$k([^\w\d_])/$1$privNamesMap{$k}$2/isg;
}

# Output the compressed JS
print $out;
close LOG;