Generalize node search logic

package.json

@@ -46,6 +46,7 @@
     "scripts/packager.sh",
     "scripts/react_native_pods.rb",
     "scripts/react-native-xcode.sh",
+    "scripts/find-node.sh",
     "template.config.js",
     "template",
     "third-party-podspecs"

scripts/find-node.sh

@@ -0,0 +1,31 @@
+#!/bin/bash
+# Copyright (c) Facebook, Inc. and its affiliates.
+#
+# This source code is licensed under the MIT license found in the
+# LICENSE file in the root directory of this source tree.
+
+set -e
+
+# Define NVM_DIR and source the nvm.sh setup script
+[ -z "$NVM_DIR" ] && export NVM_DIR="$HOME/.nvm"
+
+if [[ -s "$HOME/.nvm/nvm.sh" ]]; then
+  . "$HOME/.nvm/nvm.sh"
+elif [[ -x "$(command -v brew)" && -s "$(brew --prefix nvm)/nvm.sh" ]]; then
+  . "$(brew --prefix nvm)/nvm.sh"
+fi
+
+# Set up the nodenv node version manager if present
+if [[ -x "$HOME/.nodenv/bin/nodenv" ]]; then
+  eval "$("$HOME/.nodenv/bin/nodenv" init -)"
+elif [[ -x "$(command -v brew)" && -x "$(brew --prefix nodenv)/bin/nodenv" ]]; then
+  eval "$("$(brew --prefix nodenv)/bin/nodenv" init -)"
+fi
+
+# Set up the ndenv of anyenv if preset
+if [[ ! -x node && -d ${HOME}/.anyenv/bin ]]; then
+  export PATH=${HOME}/.anyenv/bin:${PATH}
+  if [[ "$(anyenv envs | grep -c ndenv )" -eq 1 ]]; then
+    eval "$(anyenv init -)"
+  fi
+fi