From 3acd2f04db456fcd077d49323ac66a9b9a52e7ec Mon Sep 17 00:00:00 2001
From: Joel Denning <joeldenning@gmail.com>
Date: Sun, 21 Jul 2019 23:12:33 -0600
Subject: [PATCH] fix(server): set port before instantiating server

---
 bin/webpack-dev-server.js   | 16 ++++------------
 lib/utils/processOptions.js | 17 ++++++++++++++++-
 test/cli/cli.test.js        |  2 +-
 3 files changed, 21 insertions(+), 14 deletions(-)

diff --git a/bin/webpack-dev-server.js b/bin/webpack-dev-server.js
index 26de7d4ba6..7c3456f5d3 100755
--- a/bin/webpack-dev-server.js
+++ b/bin/webpack-dev-server.js
@@ -15,7 +15,6 @@ const setupExitSignals = require('../lib/utils/setupExitSignals');
 const colors = require('../lib/utils/colors');
 const processOptions = require('../lib/utils/processOptions');
 const createLogger = require('../lib/utils/createLogger');
-const findPort = require('../lib/utils/findPort');
 const getVersions = require('../lib/utils/getVersions');
 const options = require('./options');
 
@@ -148,18 +147,11 @@ function startDevServer(config, options) {
       });
     });
   } else {
-    findPort(options.port)
-      .then((port) => {
-        options.port = port;
-        server.listen(options.port, options.host, (err) => {
-          if (err) {
-            throw err;
-          }
-        });
-      })
-      .catch((err) => {
+    server.listen(options.port, options.host, (err) => {
+      if (err) {
         throw err;
-      });
+      }
+    });
   }
 }
 
diff --git a/lib/utils/processOptions.js b/lib/utils/processOptions.js
index 23da69b430..ba224ed690 100644
--- a/lib/utils/processOptions.js
+++ b/lib/utils/processOptions.js
@@ -2,6 +2,7 @@
 
 const createConfig = require('./createConfig');
 const defaultPort = require('./defaultPort');
+const findPort = require('./findPort');
 
 function processOptions(config, argv, callback) {
   // processOptions {Promise}
@@ -23,7 +24,21 @@ function processOptions(config, argv, callback) {
   // we should use portfinder.
   const options = createConfig(config, argv, { port: defaultPort });
 
-  callback(config, options);
+  if (options.socket) {
+    callback(config, options);
+  } else {
+    findPort(options.port)
+      .then((port) => {
+        options.port = port;
+        callback(config, options);
+      })
+      .catch((err) => {
+        // eslint-disable-next-line no-console
+        console.error(err.stack || err);
+        // eslint-disable-next-line no-process-exit
+        process.exit(1);
+      });
+  }
 }
 
 module.exports = processOptions;
diff --git a/test/cli/cli.test.js b/test/cli/cli.test.js
index 91e82b7bc6..77c3f2eb70 100644
--- a/test/cli/cli.test.js
+++ b/test/cli/cli.test.js
@@ -78,7 +78,7 @@ describe('CLI', () => {
     testBin('--sockPath /mysockPath')
       .then((output) => {
         expect(
-          output.stdout.includes('http://localhost&sockPath=/mysockPath')
+          output.stdout.includes('http://localhost:8080&sockPath=/mysockPath')
         ).toEqual(true);
         done();
       })