Gruntfile.js

module.exports = function(grunt) {

  grunt.initConfig({
    pkg: grunt.file.readJSON('package.json'),
    concat: {
      options: {
          process: function(src, filepath) {
              var basepath = filepath.substring(7, filepath.lastIndexOf('/') + 1);
              // Fix relative paths for css files
              if(filepath.indexOf('.css', filepath.length - 4) !== -1) {
                  return src.replace(/(url\s*[\("']+)\s*([^'"\)]+)(['"\)]+;?)/gi,  function(match, start, url, end, offset, string) {
                      if(url.indexOf('data:') === 0) {
                          // Skip data urls
                          return match;

                      } else if(url.indexOf('/') === 0) {
                          // Skip absolute urls
                          return match;

                      } else {
                          return start + basepath + url + end;
                      }
                  });

              // Fix source maps locations
              } else if(filepath.indexOf('.js', filepath.length - 4) !== -1) {
                   return src.replace(/(\/[*\/][#@]\s*sourceMappingURL=)([^\s]+)/gi,  function(match, start, url, offset, string) {
                      if(url.indexOf('/') === 0) {
                          // Skip absolute urls
                          return match;

                      } else {
                          return start + basepath + url;
                      }
                  });

              // Don't do anything for unknown file types
              } else {
                return src;
              }
          },
      },
      js: {
        src: [
          'public/vendor/jquery/dist/jquery.js',
          'public/vendor/jquery-ui/jquery-ui.min.js',
          'public/vendor/bootstrap/dist/js/bootstrap.min.js',
          'public/vendor/datatables/media/js/jquery.dataTables.js',
          'public/vendor/datatables-bootstrap3/BS3/assets/js/datatables.js',
          'public/vendor/knockout.js/knockout.js',
          'public/vendor/knockout-mapping/build/output/knockout.mapping-latest.js',
          'public/vendor/knockout-sortable/build/knockout-sortable.min.js',
          'public/vendor/underscore/underscore.js',
          'public/vendor/bootstrap-datepicker/js/bootstrap-datepicker.js',
          'public/vendor/typeahead.js/dist/typeahead.min.js',
          'public/vendor/accounting/accounting.min.js',
          'public/vendor/spectrum/spectrum.js',
          'public/vendor/jspdf/dist/jspdf.min.js',
          //'public/vendor/handsontable/dist/jquery.handsontable.full.min.js',
          'public/js/lightbox.min.js',
          'public/js/bootstrap-combobox.js',
          'public/js/script.js',
        ],
        dest: 'public/built.js',
        nonull: true
      },
      js_public: {
        src: [
        /*
          'public/js/simpleexpand.js',
          'public/js/valign.js',
          'public/js/bootstrap.min.js',
          'public/js/simpleexpand.js',
        */
          'public/vendor/bootstrap/dist/js/bootstrap.min.js',
          
        ],
        dest: 'public/js/built.public.js',
        nonull: true
      },
      css: {
        src: [
          'public/vendor/bootstrap/dist/css/bootstrap.min.css',
          'public/vendor/datatables/media/css/jquery.dataTables.css',
          'public/vendor/datatables-bootstrap3/BS3/assets/css/datatables.css',
          'public/vendor/font-awesome/css/font-awesome.min.css',
          'public/vendor/bootstrap-datepicker/css/datepicker.css',
          'public/vendor/spectrum/spectrum.css',
          'public/css/bootstrap-combobox.css',
          'public/css/typeahead.js-bootstrap.css',
          'public/css/lightbox.css',
          //'public/vendor/handsontable/dist/jquery.handsontable.full.css',
          'public/css/style.css',
        ],
        dest: 'public/built.css',
        nonull: true,
        options: {
            process: false
        }
      },
      css_public: {
        src: [
          'public/vendor/bootstrap/dist/css/bootstrap.min.css',
          /*
          'public/css/bootstrap.splash.css',
          'public/css/splash.css',
          */
          'public/vendor/datatables/media/css/jquery.dataTables.css',
          'public/vendor/datatables-bootstrap3/BS3/assets/css/datatables.css',          
        ],
        dest: 'public/built.public.css',
        nonull: true,
        options: {
            process: false
        }
      }
    }
  });

  grunt.loadNpmTasks('grunt-contrib-concat');

  grunt.registerTask('default', ['concat']);

};