tpack-babel/index.js

TPack 插件：使用 Babel 编译 ES6/JSX。

/*
 * Copyright (C) 2016 xuld<xuld@vip.qq.com>
 *
 * Permission is hereby granted, free of charge, to any person 
 * obtaining a copy of this software and associated documentation 
 * files (the "Software"), to deal in the Software without restriction, 
 * including without limitation the rights to use, copy, modify, merge, 
 * publish, distribute, sublicense, and/or sell copies of the Software, 
 * and to permit persons to whom the Software is furnished to do so, 
 * subject to the following conditions:
 *　
 * The above copyright notice and this permission notice shall be 
 * included in all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 
 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY 
 * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, 
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE 
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 
 *
 */

var Path = require("path");

var Babel = require("babel-core");

var Jsx = require("babel-plugin-transform-react-jsx");

var CommonJs = require("babel-plugin-transform-es2015-modules-commonjs");
var CommonJSWithoutStrict = function () {
    var obj = CommonJs();
    delete obj.inherits;
    return obj;
};

var presets = [
    require("babel-plugin-check-es2015-constants"),
    require("babel-plugin-transform-es2015-template-literals"),
    require("babel-plugin-transform-es2015-literals"),
    require("babel-plugin-transform-es2015-function-name"),
    require("babel-plugin-transform-es2015-arrow-functions"),
    require("babel-plugin-transform-es2015-block-scoped-functions"),
    require("babel-plugin-transform-es2015-classes"),
    require("babel-plugin-transform-es2015-object-super"),
    require("babel-plugin-transform-es2015-shorthand-properties"),
    require("babel-plugin-transform-es2015-duplicate-keys"),
    require("babel-plugin-transform-es2015-computed-properties"),
    require("babel-plugin-transform-es2015-for-of"),
    require("babel-plugin-transform-es2015-sticky-regex"),
    require("babel-plugin-transform-es2015-unicode-regex"),
    require("babel-plugin-transform-es2015-spread"),
    require("babel-plugin-transform-es2015-parameters"),
    require("babel-plugin-transform-es2015-destructuring"),
    require("babel-plugin-transform-es2015-block-scoping"),
    require("babel-plugin-transform-es2015-typeof-symbol"),
    [require("babel-plugin-transform-regenerator"), { async: false, asyncGenerators: false }]
];

var plugins = [
    require("babel-plugin-transform-exponentiation-operator"),
    require("babel-plugin-transform-class-constructor-call"),
    require("babel-plugin-transform-class-properties"),
    require("babel-plugin-transform-async-to-generator"),
    require("babel-plugin-transform-async-to-module-method"),
    require("babel-plugin-transform-decorators"),
    require("babel-plugin-transform-do-expressions"),
    require("babel-plugin-transform-exponentiation-operator"),
    require("babel-plugin-transform-export-extensions"),
    require("babel-plugin-transform-function-bind"),
    require("babel-plugin-transform-object-rest-spread")
];

/**
 * 编译 ES6/JSX。
 * @param {BuildFile} file 要生成的文件。
 * @param {Object} options 相关的选项。
 * @see http://babeljs.io/docs/usage/options/
 */
module.exports = function babel(file, options) {

    // 设置默认值。
    options = Object.assign({
        filename: file.srcPath,
        presets: {
            plugins: presets.slice(0)
        },
        sourceMaps: !!file.sourceMap,
        inputSourceMap: file.sourceMapData,
        babelrc: false,
        compact: false,
        plugins: plugins
    }, options);

    // 更改扩展名。
    file.extension = ".js";

    // 禁止生成 use strict 语句。
    if (options.strict) {
        delete options.strict;
        options.presets.plugins.push(CommonJs);
    } else {
        options.presets.plugins.push(CommonJSWithoutStrict);
    }

    // 支持 jsx 语法。
    if (options.jsx !== false) {
        if (options.jsx === true) {
            options.jsx = {};
        }
        options.presets.plugins.push([Jsx, options.jsx]);
    }
    delete options.jsx;

    // 生成。
    var result;
    try {
        result = Babel.transform(file.content, options);
    } catch (e) {
        // 可用字段：e.name, e.message, e.loc, e.codeFrame。
        e.name = "Babel" + e.name;
        e.sourceCode = e.codeFrame;
        try {
            var m = /^(.*?): (.*)\s*\(\d+:\d+\)$/.exec(e.message);
            e.message = m[2];
            e.fileName = m[1];
            e.startLine = e.loc && e.loc.line;
            e.startColumn = e.loc && e.loc.column;
        } catch (e2) { }
        file.error(e);
        return;
    }

    // 保存。
    file.content = result.code;
    if (result.map) {
        file.sourceMap = result.map;
    }
    file.ast = result.ast;
};