Move private-cli commands to local-cli

Summary: public

We cannot remove `local-cli` because is referenced by the global cli explicitly. If we do so, people would have to upgrate this global thin cli which will cause some pain. So, lets move `private-cli` commands into `local-cli` instead.

Reviewed By: frantic

Differential Revision: D2571983

fb-gh-sync-id: 712c29430203660fb6f0d5f23813cb2a7156ee48

local-cli/util/Config.js

@@ -0,0 +1,69 @@
+/**
+ * Copyright (c) 2015-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.
+ */
+'use strict';
+
+const fs = require('fs');
+const path = require('path');
+
+const RN_CLI_CONFIG = 'rn-cli.config.js';
+let cachedConfig = null;
+
+/**
+ * Module capable of getting the configuration that should be used for
+ * the `rn-cli`. The configuration file is a JS file named `rn-cli.config.js`.
+ * It has to be on any parent directory of the cli.
+ *
+ * The function will return all the default configuration functions overriden
+ * by those found on `rn-cli.config.js`, if any. If no default config is
+ * provided and no configuration can be found in the directory hierarchy an
+ * error will be thrown.
+ */
+const Config = {
+  get(cwd, defaultConfig) {
+    if (cachedConfig) {
+      return cachedConfig;
+    }
+
+    const parentDir = findParentDirectory(cwd, RN_CLI_CONFIG);
+    if (!parentDir && !defaultConfig) {
+      throw new Error(
+        'Can\'t find "rn-cli.config.js" file in any parent folder of "' +
+        __dirname + '"'
+      );
+    }
+
+    const config = parentDir
+      ? require(path.join(parentDir, RN_CLI_CONFIG))
+      : {};
+
+    cachedConfig = Object.assign({}, defaultConfig, config);
+    cachedConfig.cwd = cwd;
+    return cachedConfig;
+  }
+};
+
+// Finds the most near ancestor starting at `currentFullPath` that has
+// a file named `filename`
+function findParentDirectory(currentFullPath, filename) {
+  const root = path.parse(currentFullPath).root;
+  const testDir = (parts) => {
+    if (parts.length === 0) {
+      return null;
+    }
+
+    const fullPath = path.join(root, parts.join(path.sep));
+
+    var exists = fs.existsSync(path.join(fullPath, filename));
+    return exists ? fullPath : testDir(parts.slice(0, -1));
+  };
+
+  return testDir(currentFullPath.substring(1).split(path.sep));
+}
+
+module.exports = Config;