SOURCE CODE: Uize.Build.NeatenJsFiles
VIEW REFERENCE

/*______________
|       ______  |   U I Z E    J A V A S C R I P T    F R A M E W O R K
|     /      /  |   ---------------------------------------------------
|    /    O /   |    MODULE : Uize.Build.NeatenJsFiles Package
|   /    / /    |
|  /    / /  /| |    ONLINE : http://www.uize.com
| /____/ /__/_| | COPYRIGHT : (c)2010-2012 UIZE
|          /___ |   LICENSE : Available under MIT License or GNU General Public License
|_______________|             http://www.uize.com/license.html
*/

/* Module Meta Data
  type: Package
  importance: 1
  codeCompleteness: 100
  testCompleteness: 0
  docCompleteness: 4
*/

/*?
  Introduction
    The =Uize.Build.NeatenJsFiles= package provides a way to recurse folder structures and neaten all JavaScript (.js) files by removing unnecessary trailing whitespace.

    *DEVELOPERS:* `Chris van Rensburg`

    The =Uize.Build.NeatenJsFiles= module is designed specifically to run in the context of Windows Script Host.
*/

Uize.module ({
  name:'Uize.Build.NeatenJsFiles',
  required:[
    'Uize.Wsh',
    'Uize.String.Lines',
    'Uize.Build.AutoScruncher'
  ],
  builder:function () {
    /*** Variables for Scruncher Optimization ***/
      var _package = function () {};

    /*** Public Static Methods ***/
      _package.perform = function (_params) {
        Uize.Wsh.buildFiles (
          Uize.copyInto (
            {
              targetFolderPathCreator:function (_folderPath) {
                return (
                  Uize.Build.AutoScruncher.getScrunchedFolderPath (
                    _folderPath,
                    _params.buildFolderPath,
                    _params.sourceFolderName
                  ) &&
                  _folderPath
                );
              },
              targetFilenameCreator:function (_sourceFileName) {
                return /\.js$/.test (_sourceFileName) ? _sourceFileName : null;
              },
              fileBuilder:function (_sourceFileName,_sourceFileText) {
                var _neatenedSourceFileText = Uize.String.Lines.trimRight (_sourceFileText);
                return (
                  _neatenedSourceFileText != _sourceFileText
                    ? {
                      outputText:_neatenedSourceFileText,
                      logDetails:
                        '\t\tTrailing Whitespace Characters Removed: ' +
                          (_sourceFileText.length - _neatenedSourceFileText.length) + '\n'
                    }
                    : {logDetails:'\t\tFILE ALREADY OK\n'}
                );
              }
            },
            _params,
            {alwaysBuild:true}
          )
        );
      };

    return _package;
  }
});