ho-compiler/dist/index.js

Less compilation for ho builds

'use strict';

var _interopRequireWildcard = function (obj) { return obj && obj.__esModule ? obj : { 'default': obj }; };

var _classCallCheck = function (instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError('Cannot call a class as a function'); } };

var _createClass = (function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ('value' in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; })();

var _get = function get(object, property, receiver) { var desc = Object.getOwnPropertyDescriptor(object, property); if (desc === undefined) { var parent = Object.getPrototypeOf(object); if (parent === null) { return undefined; } else { return get(parent, property, receiver); } } else if ('value' in desc) { return desc.value; } else { var getter = desc.get; if (getter === undefined) { return undefined; } return getter.call(receiver); } };

var _inherits = function (subClass, superClass) { if (typeof superClass !== 'function' && superClass !== null) { throw new TypeError('Super expression must either be null or a function, not ' + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) subClass.__proto__ = superClass; };

Object.defineProperty(exports, '__esModule', {
    value: true
});
/**
 * Ho-compile
 * ---
 *
 * Less compiler
 */

var _stream = require('stream');

var _stream2 = _interopRequireWildcard(_stream);

var _core = require('core-js/library/es6/object');

var _core2 = _interopRequireWildcard(_core);

var _less = require('less');

var _less2 = _interopRequireWildcard(_less);

var _log = require('./log');

var _log2 = _interopRequireWildcard(_log);

/**
 * Compiler
 * @class
 * @extends stream.Transform
 */

var Compiler = (function (_stream$Transform) {
    /**
     * @constructs
     * @param opts <Object>
     *   @param paths <Array:String> less import paths
     *   @param compress <Boolean> should compress less output
     *   @param filename <String> initial file path
     *   @param sourceMap <Boolean> should include source map in output
     * @throws on stream error
     * @throws on less compile error
     */

    function Compiler(opts) {
        _classCallCheck(this, Compiler);

        _get(Object.getPrototypeOf(Compiler.prototype), 'constructor', this).call(this);

        this.opts = _core2['default'].assign({
            paths: '',
            compress: false,
            filename: null,
            sourceMap: false
        }, opts);

        this.input = '';
    }

    _inherits(Compiler, _stream$Transform);

    _createClass(Compiler, [{
        key: '_transform',

        /**
         * _transform
         * Collects input
         * @private
         */
        value: function _transform(chunk, enc, next) {
            if (chunk !== null) {
                this.input += chunk;
            }
            next();
        }
    }, {
        key: '_flush',

        /**
         * _flush
         * Called when input has been collected
         */
        value: function _flush(done) {
            var _this = this;

            this.compile(this.input, function (err, res) {
                if (err) {
                    _this.emit('error', err);
                }
                _this.push(res.css);
                done();
            });
        }
    }, {
        key: 'compile',

        /**
         * compile
         * Turns less into css
         * @param input <String> less to convert
         * @param cb <Function>
         *   @param err <Error> non-null on any less compilation errors
         *   @param output <String> converted less
         */
        value: function compile(input, cb) {
            _less2['default'].render(input, {
                filename: this.opts.filename,
                paths: this.opts.paths,
                compress: this.opts.compress,
                sourceMap: {
                    sourceMapFileInline: this.opts.sourceMap,
                    outputSourceFiles: this.opts.sourceMap
                }
            }).then(function (output) {
                cb(null, output);
            })['catch'](function (err) {
                _log2['default'].error('Error compiling less');
                cb(err);
            });
        }
    }]);

    return Compiler;
})(_stream2['default'].Transform);

exports['default'] = Compiler;
module.exports = exports['default'];