flow like the river

BACK_BACK/node_modules/parcel-bundler/lib/utils/env.js

@@ -0,0 +1,44 @@
+"use strict";
+
+var _interopRequireDefault = require("@babel/runtime/helpers/interopRequireDefault");
+
+var _asyncToGenerator2 = _interopRequireDefault(require("@babel/runtime/helpers/asyncToGenerator"));
+
+const config = require('./config');
+
+const dotenv = require('dotenv');
+
+const variableExpansion = require('dotenv-expand');
+
+function loadEnv(_x) {
+  return _loadEnv.apply(this, arguments);
+}
+
+function _loadEnv() {
+  _loadEnv = (0, _asyncToGenerator2.default)(function* (filepath) {
+    const NODE_ENV = process.env.NODE_ENV || 'development';
+    const dotenvFiles = [`.env.${NODE_ENV}.local`, `.env.${NODE_ENV}`, // Don't include `.env.local` for `test` environment
+    // since normally you expect tests to produce the same
+    // results for everyone
+    NODE_ENV !== 'test' && '.env.local', '.env'].filter(Boolean);
+    yield Promise.all(dotenvFiles.map( /*#__PURE__*/function () {
+      var _ref = (0, _asyncToGenerator2.default)(function* (dotenvFile) {
+        const envPath = yield config.resolve(filepath, [dotenvFile]);
+
+        if (envPath) {
+          const envs = dotenv.config({
+            path: envPath
+          });
+          variableExpansion(envs);
+        }
+      });
+
+      return function (_x2) {
+        return _ref.apply(this, arguments);
+      };
+    }()));
+  });
+  return _loadEnv.apply(this, arguments);
+}
+
+module.exports = loadEnv;