fix: no serve when dev-server is false (#2947)

* chore: not create dev-server when false

* test: add test for dev server false

* fix: exit on undefined behaviour

* chore: dont update lockfile

* chore: no eol

* chore: no eol

* chore: no eol

* fix: remove old code

---------

Co-authored-by: Even Stensberg <evenstensberg@gmail.com>

Author: rishabh3112

packages/serve/src/index.ts

@@ -11,10 +11,8 @@ class ServeCommand {
     const loadDevServerOptions = () => {
       // eslint-disable-next-line @typescript-eslint/no-var-requires
       const devServer = require(WEBPACK_DEV_SERVER_PACKAGE);
-
       // eslint-disable-next-line @typescript-eslint/no-explicit-any
       const options: Record<string, any> = cli.webpack.cli.getArguments(devServer.schema);
-
       // New options format
       // { flag1: {}, flag2: {} }
       return Object.keys(options).map((key) => {
@@ -69,7 +67,6 @@ class ServeCommand {
 
         // eslint-disable-next-line @typescript-eslint/no-explicit-any
         const processors: Array<(opts: Record<string, any>) => void> = [];
-
         for (const optionName in options) {
           const kebabedOption = cli.toKebabCase(optionName);
           const isBuiltInOption = builtInOptions.find(
@@ -93,7 +90,6 @@ class ServeCommand {
             devServerCLIOptions[optionName] = options[optionName];
           }
         }
-
         for (const processor of processors) {
           processor(devServerCLIOptions);
         }
@@ -108,13 +104,11 @@ class ServeCommand {
         };
 
         webpackCLIOptions.isWatchingLikeCommand = true;
-
         const compiler = await cli.createCompiler(webpackCLIOptions);
 
         if (!compiler) {
           return;
         }
-
         const servers: (typeof DevServer)[] = [];
 
         if (cli.needWatchStdin(compiler)) {
@@ -211,7 +205,6 @@ class ServeCommand {
           }
 
           const devServerOptions: WebpackDevServerOptions = result as WebpackDevServerOptions;
-
           if (devServerOptions.port) {
             const portNumber = Number(devServerOptions.port);
 

packages/webpack-cli/src/webpack-cli.ts

@@ -2378,10 +2378,13 @@ class WebpackCLI implements IWebpackCLI {
     } else if (typeof options.nodeEnv === "string") {
       process.env.NODE_ENV = options.nodeEnv;
     }
-
     let config = await this.loadConfig(options);
     config = await this.buildConfig(config, options);
-
+    const { devServer } = config.options as boolean | WebpackDevServerOptions["options"];
+    const devServerIsFalse = devServer !== undefined && devServer === false;
+    if (devServerIsFalse && options.argv && options.argv.env && options.argv.env.WEBPACK_SERVE) {
+      process.exit(0);
+    }
     let compiler: WebpackCompiler;
     try {
       compiler = this.webpack(

test/serve/basic/dev-server-false.config.js

@@ -0,0 +1,5 @@
+module.exports = {
+  mode: "development",
+  devtool: false,
+  devServer: false,
+};

test/serve/basic/serve-basic.test.js

@@ -116,6 +116,16 @@ describe("basic serve usage", () => {
     expect(stdout).toContain("main.js");
   });
 
+  it("should not start dev server when supplied false", async () => {
+    const { stderr, stdout } = await runWatch(__dirname, [
+      "serve",
+      "--config",
+      "dev-server-false.config.js",
+    ]);
+    expect(stdout).toBeFalsy();
+    expect(stderr).toBeFalsy();
+  });
+
   it('should work with the "--stats" option', async () => {
     const { stderr, stdout } = await runWatch(__dirname, ["serve", "--stats"]);