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3a515b92
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cagy
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"use strict";
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var babel = require("babel-core");
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var loaderUtils = require("loader-utils");
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var path = require("path");
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var cache = require("./fs-cache.js");
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var exists = require("./utils/exists");
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var relative = require("./utils/relative");
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var read = require("./utils/read");
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var resolveRc = require("./resolve-rc.js");
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var pkg = require("../package.json");
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var fs = require("fs");
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/**
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* Error thrown by Babel formatted to conform to Webpack reporting.
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*/
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function BabelLoaderError(name, message, codeFrame, hideStack, error) {
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Error.call(this);
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this.name = "BabelLoaderError";
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this.message = formatMessage(name, message, codeFrame);
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this.hideStack = hideStack;
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this.error = error;
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Error.captureStackTrace(this, BabelLoaderError);
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}
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BabelLoaderError.prototype = Object.create(Error.prototype);
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BabelLoaderError.prototype.constructor = BabelLoaderError;
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var STRIP_FILENAME_RE = /^[^:]+: /;
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var formatMessage = function formatMessage(name, message, codeFrame) {
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return (name ? name + ": " : "") + message + "\n\n" + codeFrame + "\n";
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};
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var transpile = function transpile(source, options) {
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var forceEnv = options.forceEnv;
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var tmpEnv = void 0;
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delete options.forceEnv;
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if (forceEnv) {
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tmpEnv = process.env.BABEL_ENV;
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process.env.BABEL_ENV = forceEnv;
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}
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var result = void 0;
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try {
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result = babel.transform(source, options);
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} catch (error) {
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if (forceEnv) restoreBabelEnv(tmpEnv);
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if (error.message && error.codeFrame) {
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var message = error.message;
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var name = void 0;
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var hideStack = void 0;
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if (error instanceof SyntaxError) {
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message = message.replace(STRIP_FILENAME_RE, "");
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name = "SyntaxError";
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hideStack = true;
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} else if (error instanceof TypeError) {
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message = message.replace(STRIP_FILENAME_RE, "");
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hideStack = true;
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}
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throw new BabelLoaderError(name, message, error.codeFrame, hideStack, error);
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} else {
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throw error;
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}
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}
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var code = result.code;
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var map = result.map;
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var metadata = result.metadata;
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if (map && (!map.sourcesContent || !map.sourcesContent.length)) {
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map.sourcesContent = [source];
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}
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if (forceEnv) restoreBabelEnv(tmpEnv);
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return {
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code: code,
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map: map,
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metadata: metadata
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};
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};
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function restoreBabelEnv(prevValue) {
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if (prevValue === undefined) {
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delete process.env.BABEL_ENV;
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} else {
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process.env.BABEL_ENV = prevValue;
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}
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}
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function passMetadata(s, context, metadata) {
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if (context[s]) {
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context[s](metadata);
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}
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}
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module.exports = function (source, inputSourceMap) {
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var _this = this;
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var filename = this.resourcePath;
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// Handle options
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var loaderOptions = loaderUtils.getOptions(this) || {};
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var fileSystem = this.fs ? this.fs : fs;
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var babelrcPath = null;
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if (loaderOptions.babelrc !== false) {
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babelrcPath = typeof loaderOptions.babelrc === "string" && exists(fileSystem, loaderOptions.babelrc) ? loaderOptions.babelrc : resolveRc(fileSystem, path.dirname(filename));
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}
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if (babelrcPath) {
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this.addDependency(babelrcPath);
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}
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var defaultOptions = {
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metadataSubscribers: [],
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inputSourceMap: inputSourceMap,
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sourceRoot: process.cwd(),
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filename: filename,
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cacheIdentifier: JSON.stringify({
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"babel-loader": pkg.version,
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"babel-core": babel.version,
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babelrc: babelrcPath ? read(fileSystem, babelrcPath) : null,
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env: loaderOptions.forceEnv || process.env.BABEL_ENV || process.env.NODE_ENV || "development"
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})
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};
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var options = Object.assign({}, defaultOptions, loaderOptions);
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if (loaderOptions.sourceMap === undefined) {
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options.sourceMap = this.sourceMap;
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}
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if (options.sourceFileName === undefined) {
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options.sourceFileName = relative(options.sourceRoot, options.filename);
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}
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var cacheDirectory = options.cacheDirectory;
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var cacheIdentifier = options.cacheIdentifier;
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var metadataSubscribers = options.metadataSubscribers;
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delete options.cacheDirectory;
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delete options.cacheIdentifier;
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delete options.metadataSubscribers;
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if (cacheDirectory) {
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var callback = this.async();
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return cache({
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directory: cacheDirectory,
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identifier: cacheIdentifier,
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source: source,
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options: options,
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transform: transpile
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}, function (err) {
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var _ref = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {},
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code = _ref.code,
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map = _ref.map,
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metadata = _ref.metadata;
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if (err) return callback(err);
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metadataSubscribers.forEach(function (s) {
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return passMetadata(s, _this, metadata);
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});
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return callback(null, code, map);
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});
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}
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var _transpile = transpile(source, options),
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code = _transpile.code,
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map = _transpile.map,
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metadata = _transpile.metadata;
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metadataSubscribers.forEach(function (s) {
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return passMetadata(s, _this, metadata);
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});
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this.callback(null, code, map);
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};
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