Allow empty .env

Author: opyh

.nowignore

@@ -0,0 +1 @@
+.npmrc

src/lib/env.js

@@ -1,12 +1,20 @@
 let env = (typeof window !== 'undefined' && window.env) || {};
 
 if (typeof window === 'undefined') {
-  const dotenvConfig = require('dotenv').config();
-  if (dotenvConfig.error) {
-    throw dotenvConfig.error;
-  }
+  const fs = require('fs');
+  try {
+    const stats = fs.statSync('.env');
+    if (stats && stats.isFile()) {
+      const dotenvConfig = require('dotenv').config();
+      if (dotenvConfig.error) {
+        throw dotenvConfig.error;
+      }
 
-  Object.assign(env, dotenvConfig.parsed, process.env);
+      Object.assign(env, dotenvConfig.parsed, process.env);
+    }
+  } catch (e) {
+    console.log('No .env file existing or accessible:', e);
+  }
 }
 
 module.exports = env;

src/server/server.js

@@ -1,9 +1,6 @@
-const dotenvConfig = require('dotenv').config();
 const pick = require('lodash/pick');
-if (dotenvConfig.error) {
-  throw dotenvConfig.error;
-}
-console.log('Parsed .env config:', dotenvConfig.parsed);
+const dotenvConfig = require('../lib/env');
+console.log('Parsed .env config:', dotenvConfig);
 console.log('Node version:', process.version);
 
 const apm = require('../lib/apm/ServerSide');
@@ -70,7 +67,7 @@ app.prepare().then(() => {
 
   // Defines a filtered set of environment variables to the client.
   server.get('/clientEnv.js', (req, res) => {
-    const envAndDotEnv = { ...dotenvConfig.parsed, ...process.env };
+    const envAndDotEnv = { ...dotenvConfig, ...process.env };
     const filteredEnvObject = JSON.stringify(
       pick(
         envAndDotEnv,