61 lines
1.6 KiB
JavaScript
61 lines
1.6 KiB
JavaScript
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/**
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* Copyright (c) 2015-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*/
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'use strict';
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const fs = require('fs');
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const path = require('path');
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const RN_CLI_CONFIG = 'rn-cli.config.js';
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let cachedConfig = null;
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/**
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* Module capable of getting the configuration that should be used for
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* the `rn-cli`. The configuration file is a JS file named `rn-cli.conf.js`.
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* It has to be on any parent directory of the cli.
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*/
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const Config = {
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get() {
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if (cachedConfig) {
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return cachedConfig;
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}
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const parentDir = findParentDirectory(__dirname, RN_CLI_CONFIG);
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if (!parentDir) {
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throw new Error(
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'Can\'t find "rn-cli.config.js" file in any parent folder of "' +
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__dirname + '"'
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);
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}
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cachedConfig = require(path.join(parentDir, RN_CLI_CONFIG));
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return cachedConfig;
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}
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};
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// Finds the most near ancestor starting at `currentFullPath` that has
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// a file named `filename`
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function findParentDirectory(currentFullPath, filename) {
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const root = path.parse(currentFullPath).root;
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const testDir = (parts) => {
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if (parts.length === 0) {
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return null;
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}
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const fullPath = path.join(root, parts.join(path.sep));
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var exists = fs.existsSync(path.join(fullPath, filename));
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return exists ? fullPath : testDir(parts.slice(0, -1));
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};
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return testDir(currentFullPath.substring(1).split(path.sep));
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}
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module.exports = Config;
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