bem-techs-core/lib/bemhtml/api.js

Core bem tech modules

'use strict';

var bemXjst = require('bem-xjst'),
    vm = require('vm');

var api = exports;

//
// ### function translate (source)
// #### @source {String} BEMHTML Source code
// #### @options {Object} Compilation options **optional**
// Returns source translated to javascript
//
api.translate = function translate(source, options) {
    options = options || {};

    var xjstJS = bemXjst.generate(source, {
          optimize: !options.devMode
        }),
        exportName = options.exportName || 'BEMHTML';

    return [
           '(function(g) {\n',
           '  var __xjst = (function(exports) {\n',
           '     ' + xjstJS + ';',
           '     return exports;',
           '  })({});',
           '  var defineAsGlobal = true;',
           '  if(typeof exports === "object") {',
           '    exports["' + exportName + '"] = __xjst;',
           '    defineAsGlobal = false;',
           '  }',
           '  if(typeof modules === "object") {',
           '    modules.define("' + exportName + '", function(provide) { provide(__xjst) });',
           '    defineAsGlobal = false;',
           '  }',
           '  defineAsGlobal && (g["' + exportName + '"] = __xjst);',
           '})(this);'
           ].join('\n');
};

//
// ### function compile (source)
// #### @source {String} BEMHTML Source code
// #### @options {Object} Compilation options **optional**
// Returns generator function
//
api.compile = function compile(source, options) {
  var body = exports.translate(source, options),
      context = { exports: {} };

  if (options && options.devMode) {
      context.console = console;
  }
  vm.runInNewContext(body, context);

  return context.exports.BEMHTML;
};