Set dev server listen host and port via environment variables

README.md

@@ -164,13 +164,15 @@ precedence over the ones already set in the configuration file.
 
 By default, webpack dev server listens on `localhost` in development for security
 but if you want your app to be available over local LAN IP or VM instance like vagrant
-you can pass an additional config option `--listen-host`
+you can set environment variable `WEBPACK_DEV_SERVER_LISTEN_HOST`
 when running `./bin/webpack-dev-server` binstub:
 
 ```bash
-./bin/webpack-dev-server --listen-host 0.0.0.0
+WEBPACK_DEV_SERVER_LISTEN_HOST=0.0.0.0 ./bin/webpack-dev-server
 ```
 
+Dev server listen port can be set either in `config/webpacker.yml` or via environment variable `WEBPACK_DEV_SERVER_PORT`. The later takes precedence.
+
 **Note:** Don't forget to prefix `ruby` when running these binstubs on windows
 
 ## Integrations

lib/install/bin/webpack-dev-server.tt

@@ -27,10 +27,10 @@ begin
   dev_server = YAML.load_file(CONFIG_FILE)[RAILS_ENV]["dev_server"]
 
   HOSTNAME          = args('--host') || dev_server["host"]
-  PORT              = args('--port') || dev_server["port"]
+  PORT              = ENV['WEBPACK_DEV_SERVER_PORT'] || dev_server["port"]
   HTTPS             = ARGV.include?('--https') || dev_server["https"]
   DEV_SERVER_ADDR   = "http#{"s" if HTTPS}://#{HOSTNAME}:#{PORT}"
-  LISTEN_HOST_ADDR  = args('--listen-host') || DEFAULT_LISTEN_HOST_ADDR
+  LISTEN_HOST_ADDR  = ENV['WEBPACK_DEV_SERVER_LISTEN_HOST'] || DEFAULT_LISTEN_HOST_ADDR
 
 rescue Errno::ENOENT, NoMethodError
   $stdout.puts "Webpack dev_server configuration not found in #{CONFIG_FILE}."
@@ -47,11 +47,9 @@ rescue Errno::EADDRINUSE
   exit!
 end
 
-# Delete supplied host, port and listen-host CLI arguments
-["--host", "--port", "--listen-host"].each do |arg|
-  ARGV.delete(args(arg))
-  ARGV.delete(arg)
-end
+# Delete supplied host CLI argument
+ARGV.delete(args("--host"))
+ARGV.delete("--host")
 
 env = { "NODE_PATH" => NODE_MODULES_PATH.shellescape }
 

lib/webpacker/dev_server.rb

@@ -21,11 +21,11 @@ def hot_module_replacing?
   end
 
   def host
-    fetch(:host)
+    ENV["WEBPACK_DEV_SERVER_LISTEN_HOST"] || fetch(:host)
   end
 
   def port
-    fetch(:port)
+    ENV["WEBPACK_DEV_SERVER_PORT"] || fetch(:port)
   end
 
   def https?