index.js
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"use strict";
var assign = require("object-assign");
var babel = require("babel-core");
var loaderUtils = require("loader-utils");
var path = require("path");
var cache = require("./fs-cache.js");
var exists = require("./utils/exists")();
var relative = require("./utils/relative");
var read = require("./utils/read")();
var resolveRc = require("./resolve-rc.js");
var pkg = require("./../package.json");
function BabelLoaderError(name, message, codeFrame, hideStack, error) {
Error.call(this);
Error.captureStackTrace(this, BabelLoaderError);
this.name = "BabelLoaderError";
this.message = formatMessage(name, message, codeFrame);
this.hideStack = hideStack;
this.error = error;
}
BabelLoaderError.prototype = Object.create(Error.prototype);
BabelLoaderError.prototype.constructor = BabelLoaderError;
var STRIP_FILENAME_RE = /^[^:]+: /;
var formatMessage = function formatMessage(name, message, codeFrame) {
return (name ? name + ": " : "") + message + "\n\n" + codeFrame + "\n";
};
var transpile = function transpile(source, options) {
var forceEnv = options.forceEnv;
var tmpEnv = void 0;
delete options.forceEnv;
if (forceEnv) {
tmpEnv = process.env.BABEL_ENV;
process.env.BABEL_ENV = forceEnv;
}
var result = void 0;
try {
result = babel.transform(source, options);
} catch (error) {
if (forceEnv) process.env.BABEL_ENV = tmpEnv;
if (error.message && error.codeFrame) {
var message = error.message;
var name = void 0;
var hideStack = void 0;
if (error instanceof SyntaxError) {
message = message.replace(STRIP_FILENAME_RE, "");
name = "SyntaxError";
hideStack = true;
} else if (error instanceof TypeError) {
message = message.replace(STRIP_FILENAME_RE, "");
hideStack = true;
}
throw new BabelLoaderError(name, message, error.codeFrame, hideStack, error);
} else {
throw error;
}
}
var code = result.code;
var map = result.map;
if (map && (!map.sourcesContent || !map.sourcesContent.length)) {
map.sourcesContent = [source];
}
if (forceEnv) process.env.BABEL_ENV = tmpEnv;
return {
code: code,
map: map
};
};
module.exports = function (source, inputSourceMap) {
var webpackRemainingChain = loaderUtils.getRemainingRequest(this).split("!");
var filename = webpackRemainingChain[webpackRemainingChain.length - 1];
var globalOptions = this.options.babel || {};
var loaderOptions = loaderUtils.parseQuery(this.query);
var userOptions = assign({}, globalOptions, loaderOptions);
var defaultOptions = {
inputSourceMap: inputSourceMap,
sourceRoot: process.cwd(),
filename: filename,
cacheIdentifier: JSON.stringify({
"babel-loader": pkg.version,
"babel-core": babel.version,
babelrc: exists(userOptions.babelrc) ? read(userOptions.babelrc) : resolveRc(path.dirname(filename)),
env: userOptions.forceEnv || process.env.BABEL_ENV || process.env.NODE_ENV || "development"
})
};
var options = assign({}, defaultOptions, userOptions);
if (userOptions.sourceMap === undefined) {
options.sourceMap = this.sourceMap;
}
if (options.sourceFileName === undefined) {
options.sourceFileName = relative(options.sourceRoot, options.filename);
}
var cacheDirectory = options.cacheDirectory;
var cacheIdentifier = options.cacheIdentifier;
delete options.cacheDirectory;
delete options.cacheIdentifier;
this.cacheable();
if (cacheDirectory) {
var callback = this.async();
return cache({
directory: cacheDirectory,
identifier: cacheIdentifier,
source: source,
options: options,
transform: transpile
}, function (err, result) {
if (err) {
return callback(err);
}
return callback(null, result.code, result.map);
});
}
var result = transpile(source, options);
this.callback(null, result.code, result.map);
};