SOURCE CODE: Uize.Wsh.AutoScruncher

/*______________
|       ______  |   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.Wsh.AutoScruncher Package
|   /    / /    |
|  /    / /  /| |    ONLINE : http://uize.com
| /____/ /__/_| | COPYRIGHT : (c)2005-2009 UIZE
|          /___ |   LICENSE : Available under MIT License or GNU General Public License
|_______________|             http://uize.com/license.html
*/

/*ScruncherSettings Mappings="=" LineCompacting="TRUE"*/

/*?
  Introduction
    The =Uize.Wsh.AutoScruncher= package provides a method to recurse a folder structure and scrunch (minify / compress) and obfuscate JavaScript source.

    *DEVELOPERS:* `Chris van Rensburg`

    The =Uize.Wsh.AutoScruncher= module is a package under the =Uize.Wsh= namespace, designed specifically to run in the context of Windows Script Host.
*/

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

    /*** Public Static Methods ***/
      _package.perform = function (_params) {
        var
          _buildDate = Uize.Date.toIso8601 (),
          _endsWidthDotJsRegExp = /\.js$/,
          _buildScriptName = WScript.ScriptName,
          _rootPath = WScript.ScriptFullName.slice (0,-_buildScriptName.length - 1),
          _buildFolderPath = _params.buildFolderPath && _rootPath + '\\' + _params.buildFolderPath,
          _sourceFolderName = _params.sourceFolderName,
          _sourceFolderNameLength = _sourceFolderName ? _sourceFolderName.length : 0
        ;
        function _targetFolderPathCreator (_folderPath) {
          return (
            _sourceFolderNameLength
              ? (
                _folderPath.slice (-_sourceFolderNameLength) == _sourceFolderName
                  ? _folderPath.slice (0,-_sourceFolderNameLength - 1)
                  : null
              )
              : _buildFolderPath + _folderPath.substr (_rootPath.length)
          );
        }

        /*** scrunch eligible JavaScript files ***/
          Uize.Wsh.buildFiles (
            Uize.copyInto (
              {
                logFileName:_buildScriptName.replace (_endsWidthDotJsRegExp,'-js-files.log'),
                targetFolderPathCreator:_targetFolderPathCreator,
                targetFilenameCreator:function (_sourceFileName) {
                  return _endsWidthDotJsRegExp.test (_sourceFileName) ? _sourceFileName : null;
                },
                fileBuilder:function (_sourceFileName,_sourceFileText) {
                  var
                    _keepHeadComment = _sourceFileName.indexOf ('Uize.'),
                    _scruncherResult = Uize.Scruncher.scrunch (
                      _sourceFileText,_keepHeadComment ? '' : 'KEEPHEADCOMMENT="FALSE"'
                    )
                  ;
                  return {
                    outputText:
                      (
                        _keepHeadComment
                          ? ''
                          : (
                            '/*\n' +
                              '\tUIZE JAVASCRIPT FRAMEWORK ' + _buildDate + '\n' +
                              '\n' +
                              '\thttp://uize.com/reference/' + _sourceFileName.replace (_endsWidthDotJsRegExp,'') + '.html\n' +
                              '\tAvailable under MIT License or GNU General Public License -- http://uize.com/license.html\n' +
                            '*/\n'
                          )
                      ) + _scruncherResult.scrunchedCode,
                    logDetails:Uize.String.indent (_scruncherResult.report,2) + '\n'
                  };
                }
              },
              _params
            )
          );

        /*** build .library.js files ***/
          /* TO DO:
            substitute scrunched modules in library contents comment
          */
          var
            _contentsCommentRegExp = /\/\*\s*Library\s*Contents/i,
            _scrunchedModulePath = _targetFolderPathCreator (_rootPath + '\\' + _params.moduleFolderPath),
            _libraryUsesUizeModulesHeader =
              '/*______________\n' +
              '|       ______  |   B U I L T     O N     U I Z E     F R A M E W O R K\n' +
              '|     /      /  |   ---------------------------------------------------\n' +
              '|    /    O /   |   This JavaScript application is developed using the object\n' +
              '|   /    / /    |   oriented UIZE JavaScript framework as its foundation.\n' +
              '|  /    / /  /| |\n' +
              '| /____/ /__/_| |    ONLINE : http://uize.com\n' +
              '|          /___ |   LICENSE : Available under MIT License or GNU General Public License\n' +
              '|_______________|             http://uize.com/license.html\n' +
              '*/\n\n'
          ;
          Uize.Wsh.buildFiles (
            Uize.copyInto (
              {
                targetFolderPathCreator:_targetFolderPathCreator,
                targetFilenameCreator:function (_sourceFileName) {
                  return /\.library.js$/.test (_sourceFileName) ? _sourceFileName : null;
                },
                fileBuilder:function (_sourceFileName,_sourceFileText) {
                  function _stripModuleHeaderComment (_moduleText) {
                    var _moduleHeaderCommentPos = _moduleText.indexOf ('/*');
                    return (
                      _moduleHeaderCommentPos > -1
                        ? (
                          _moduleText.slice (0,_moduleHeaderCommentPos) +
                          _moduleText.slice (_moduleText.indexOf ('*/',_moduleHeaderCommentPos + 2) + 2)
                        )
                        : _moduleText
                    );
                  }
                  var
                    _libraryContentsChunks = [],
                    _libraryUsesUizeModules
                  ;
                  for (
                    var
                      _moduleNo = -1,
                      _contentsCommentStartPos = _sourceFileText.search (_contentsCommentRegExp),
                      _contentsCommentEndPos = _sourceFileText.indexOf ('*/',_contentsCommentStartPos),
                      _modules = Uize.String.splitLines (
                        _contentsCommentStartPos > -1
                          ?
                            _sourceFileText.slice (_contentsCommentStartPos,_contentsCommentEndPos)
                              .replace (_contentsCommentRegExp,'')
                          : _sourceFileText
                      ),
                      _modulesLength = _modules.length
                    ;
                    ++_moduleNo < _modulesLength;
                  ) {
                    var _moduleName = Uize.String.trim (_modules [_moduleNo]);
                    if (_moduleName) {
                      if (!_libraryUsesUizeModules)
                        _libraryUsesUizeModules = Uize.String.startsWith (_moduleName,'Uize')
                      ;
                      _libraryContentsChunks.push (
                        '\n' +
                        _stripModuleHeaderComment (
                          Uize.Wsh.readFile (
                            _scrunchedModulePath + '\\' + _moduleName +
                            (_endsWidthDotJsRegExp.test (_moduleName) ? '' : '.js')
                          )
                        )
                      );
                    }
                  }
                  return {
                    outputText:
                      (_libraryUsesUizeModules ? _libraryUsesUizeModulesHeader : '') +
                      _sourceFileText.slice (0,_contentsCommentStartPos) +
                      _libraryContentsChunks.join ('\n') +
                      _sourceFileText.slice (_contentsCommentEndPos + 2)
                  };
                }
              },
              _params,
              {
                alwaysBuild:true,
                logFileName:_buildScriptName.replace (_endsWidthDotJsRegExp,'-libraries.log')
              }
            )
          );
        };

    return _package;
  }
});