131 lines
3.6 KiB
JavaScript
131 lines
3.6 KiB
JavaScript
'use strict'; /**
|
|
* Copyright (c) 2014-present, Facebook, Inc. All rights reserved.
|
|
*
|
|
* This source code is licensed under the BSD-style license found in the
|
|
* LICENSE file in the root directory of this source tree. An additional grant
|
|
* of patent rights can be found in the PATENTS file in the same directory.
|
|
*
|
|
*
|
|
*/
|
|
|
|
|
|
|
|
|
|
const crypto = require('crypto');
|
|
const fs = require('fs');
|
|
const path = require('path');
|
|
const jestPreset = require('babel-preset-jest');
|
|
|
|
const BABELRC_FILENAME = '.babelrc';
|
|
const BABELRC_JS_FILENAME = '.babelrc.js';
|
|
const BABEL_CONFIG_KEY = 'babel';
|
|
const PACKAGE_JSON = 'package.json';
|
|
const THIS_FILE = fs.readFileSync(__filename);
|
|
|
|
let babel;
|
|
|
|
const createTransformer = options => {
|
|
const cache = Object.create(null);
|
|
|
|
const getBabelRC = filename => {
|
|
const paths = [];
|
|
let directory = filename;
|
|
while (directory !== (directory = path.dirname(directory))) {
|
|
if (cache[directory]) {
|
|
break;
|
|
}
|
|
|
|
paths.push(directory);
|
|
const configFilePath = path.join(directory, BABELRC_FILENAME);
|
|
if (fs.existsSync(configFilePath)) {
|
|
cache[directory] = fs.readFileSync(configFilePath, 'utf8');
|
|
break;
|
|
}
|
|
const configJsFilePath = path.join(directory, BABELRC_JS_FILENAME);
|
|
if (fs.existsSync(configJsFilePath)) {
|
|
// $FlowFixMe
|
|
cache[directory] = JSON.stringify(require(configJsFilePath));
|
|
break;
|
|
}
|
|
const packageJsonFilePath = path.join(directory, PACKAGE_JSON);
|
|
if (fs.existsSync(packageJsonFilePath)) {
|
|
// $FlowFixMe
|
|
const packageJsonFileContents = require(packageJsonFilePath);
|
|
if (packageJsonFileContents[BABEL_CONFIG_KEY]) {
|
|
cache[directory] = JSON.stringify(
|
|
packageJsonFileContents[BABEL_CONFIG_KEY]);
|
|
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
paths.forEach(directoryPath => cache[directoryPath] = cache[directory]);
|
|
return cache[directory] || '';
|
|
};
|
|
|
|
options = Object.assign({}, options, {
|
|
plugins: options && options.plugins || [],
|
|
presets: (options && options.presets || []).concat([jestPreset]),
|
|
retainLines: true });
|
|
|
|
delete options.cacheDirectory;
|
|
delete options.filename;
|
|
|
|
return {
|
|
canInstrument: true,
|
|
getCacheKey(
|
|
fileData,
|
|
filename,
|
|
configString, _ref)
|
|
|
|
{let instrument = _ref.instrument;
|
|
return crypto.
|
|
createHash('md5').
|
|
update(THIS_FILE).
|
|
update('\0', 'utf8').
|
|
update(fileData).
|
|
update('\0', 'utf8').
|
|
update(configString).
|
|
update('\0', 'utf8').
|
|
update(getBabelRC(filename)).
|
|
update('\0', 'utf8').
|
|
update(instrument ? 'instrument' : '').
|
|
digest('hex');
|
|
},
|
|
process(
|
|
src,
|
|
filename,
|
|
config,
|
|
transformOptions)
|
|
{
|
|
if (!babel) {
|
|
babel = require('babel-core');
|
|
}
|
|
|
|
if (babel.util && !babel.util.canCompile(filename)) {
|
|
return src;
|
|
}
|
|
|
|
const theseOptions = Object.assign({ filename }, options);
|
|
if (transformOptions && transformOptions.instrument) {
|
|
theseOptions.auxiliaryCommentBefore = ' istanbul ignore next ';
|
|
// Copied from jest-runtime transform.js
|
|
theseOptions.plugins = theseOptions.plugins.concat([
|
|
[
|
|
require('babel-plugin-istanbul').default,
|
|
{
|
|
// files outside `cwd` will not be instrumented
|
|
cwd: config.rootDir,
|
|
exclude: [] }]]);
|
|
|
|
|
|
|
|
}
|
|
|
|
return babel.transform(src, theseOptions).code;
|
|
} };
|
|
|
|
};
|
|
|
|
module.exports = createTransformer();
|
|
module.exports.createTransformer = createTransformer; |