minimal code example to show warnings when building Colyseus server with webpack

readme.md

reference

https://discuss.colyseus.io/topic/424/fixing-warnings-when-bundling-colyseus-server-with-webpack

files

• readme.md
• package.json
• tsconfig.json
• webpack.config.js
• webpack.bat (for Windows)
• main.ts

instructions

1. npm install
2. npm run build

output

> demo@1.0.0 build C:\demo
> webpack --config webpack.config.js

Hash: 5a6cc71b15fda019b94a
Version: webpack 4.44.2
Time: 5110ms
Built at: 2020-12-07 20:54:53
            Asset      Size  Chunks                   Chunk Names
    main-built.js  1000 KiB       0  [emitted]        main
main-built.js.map   1.1 MiB       0  [emitted] [dev]  main
Entrypoint main = main-built.js main-built.js.map
  [0] ./main.ts 282 bytes {0} [built] [1 error]
  [7] external "http" 42 bytes {0} [built]
  [8] external "net" 42 bytes {0} [built]
 [11] external "events" 42 bytes {0} [built]
 [12] external "https" 42 bytes {0} [built]
 [13] external "tls" 42 bytes {0} [built]
 [14] external "crypto" 42 bytes {0} [built]
 [15] external "url" 42 bytes {0} [built]
 [17] external "zlib" 42 bytes {0} [built]
 [22] external "stream" 42 bytes {0} [built]
 [35] external "tty" 42 bytes {0} [built]
 [36] external "util" 42 bytes {0} [built]
 [38] external "os" 42 bytes {0} [built]
[122] external "assert" 42 bytes {0} [built]
[139] external "querystring" 42 bytes {0} [built]
    + 150 hidden modules

WARNING in ./node_modules/ws/lib/buffer-util.js
Module not found: Error: Can't resolve 'bufferutil' in 'C:\demo\node_modules\ws\lib'
 @ ./node_modules/ws/lib/buffer-util.js
 @ ./node_modules/ws/lib/websocket.js
 @ ./node_modules/ws/index.js
 @ ./node_modules/colyseus/lib/Server.js
 @ ./node_modules/colyseus/lib/index.js
 @ ./main.ts

WARNING in ./node_modules/ws/lib/validation.js
Module not found: Error: Can't resolve 'utf-8-validate' in 'C:\demo\node_modules\ws\lib'
 @ ./node_modules/ws/lib/validation.js
 @ ./node_modules/ws/lib/receiver.js
 @ ./node_modules/ws/index.js
 @ ./node_modules/colyseus/lib/Server.js
 @ ./node_modules/colyseus/lib/index.js
 @ ./main.ts

WARNING in ./node_modules/default-gateway/README.md 1:0
Module parse failed: Unexpected character '#' (1:0)
You may need an appropriate loader to handle this file type, currently no loaders are configured to process this file. See https://webpack.js.org/concepts#loaders
> # default-gateway
| [![](https://img.shields.io/npm/v/default-gateway.svg?style=flat)](https://www.npmjs.org/package/default-gateway) [![](https://img.shields.io/npm/dm/default-gateway.svg)](https://www.npmjs.org/package/default-gateway) [![](https://api.travis-ci.org/silverwind/default-gateway.svg?style=flat)](https://travis-ci.org/silverwind/default-gateway)
| 
 @ ./node_modules/default-gateway sync ^\.\/.*$ ./README.md
 @ ./node_modules/default-gateway/index.js
 @ ./node_modules/internal-ip/index.js
 @ ./node_modules/colyseus/lib/discovery/index.js
 @ ./node_modules/colyseus/lib/Server.js
 @ ./node_modules/colyseus/lib/index.js
 @ ./main.ts

WARNING in ./node_modules/default-gateway/LICENSE 1:14
Module parse failed: Unexpected token (1:14)
You may need an appropriate loader to handle this file type, currently no loaders are configured to process this file. See https://webpack.js.org/concepts#loaders
> Copyright (c) silverwind
| All rights reserved.
| 
 @ ./node_modules/default-gateway sync ^\.\/.*$ ./LICENSE
 @ ./node_modules/default-gateway/index.js
 @ ./node_modules/internal-ip/index.js
 @ ./node_modules/colyseus/lib/discovery/index.js
 @ ./node_modules/colyseus/lib/Server.js
 @ ./node_modules/colyseus/lib/index.js
 @ ./main.ts

ERROR in ./node_modules/redis-parser/lib/hiredis.js
Module not found: Error: Can't resolve 'hiredis' in 'C:\demo\node_modules\redis-parser\lib'
 @ ./node_modules/redis-parser/lib/hiredis.js 3:14-32
 @ ./node_modules/redis-parser/lib/parser.js
 @ ./node_modules/redis-parser/index.js
 @ ./node_modules/redis/index.js
 @ ./node_modules/colyseus/lib/presence/RedisPresence.js
 @ ./node_modules/colyseus/lib/index.js
 @ ./main.ts

main.ts

/// <reference types="node" />

import { Server } from "colyseus";
const port = 3000;
const gameServer = new Server();
gameServer.listen(port);

package.json

{
  "name": "demo",
  "version": "1.0.0",
  "description": "https://discuss.colyseus.io/topic/424/fixing-warnings-when-bundling-colyseus-server-with-webpack",
  "main": "javascript-built-by-webpack/main.js",
  "scripts": {
    "build": "webpack --config webpack.config.js",
    "watch": "webpack --config webpack.config.js --watch"
  },
  "author": "TeeTeeHaa",
  "license": "WTFPL",
  "devDependencies": {
    "@types/node": "12.19.0",
    "ts-loader": "^8.0.11",
    "tslint": "^6.1.3",
    "typescript": "^4.0.5",
    "webpack": "^4.44.2",
    "webpack-cli": "^3.3.12",
    "webpack-dev-server": "^3.11.0"
  },
  "dependencies": {
    "colyseus": "^0.14.2"
  }
}

tsconfig.json

// https://www.typescriptlang.org/tsconfig
{
  /* === Compiler Options === */
  "compilerOptions": {
    /* Basic Options */
    // "incremental": true,                   /* Enable incremental compilation */
    "target": "es5",                          /* Specify ECMAScript target version: 'ES3' (default), 'ES5', 'ES2015', 'ES2016', 'ES2017', 'ES2018', 'ES2019', 'ES2020', or 'ESNEXT'. */
    "module": "commonjs",                     /* Specify module code generation: 'none', 'commonjs', 'amd', 'system', 'umd', 'es2015', 'es2020', or 'ESNext'. */
    "resolveJsonModule": true,                /* Allow import of JSON modules, see https://mariusschulz.com/blog/importing-json-modules-in-typescript */
    // "lib": [],                             /* Specify library files to be included in the compilation. */
    // "allowJs": true,                       /* Allow javascript files to be compiled. */
    // "checkJs": true,                       /* Report errors in .js files. */
    // "jsx": "preserve",                     /* Specify JSX code generation: 'preserve', 'react-native', or 'react'. */
    // "declaration": true,                   /* Generates corresponding '.d.ts' file. */
    // "declarationMap": true,                /* Generates a sourcemap for each corresponding '.d.ts' file. */
    "sourceMap": true,                        /* Generates corresponding '.map' file. */
    // "outFile": "./",                       /* Concatenate and emit output to single file. */
    "outDir": "javascript-built-by-tsc/",     /* Redirect output structure to the directory. */
    // "rootDir": "",                         /* Specify the root directory of input files. Use to control the output directory structure with --outDir. */
    // "composite": true,                     /* Enable project compilation */
    // "tsBuildInfoFile": "./",               /* Specify file to store incremental compilation information */
    // "removeComments": true,                /* Do not emit comments to output. */
    // "noEmit": true,                        /* Do not emit outputs. */
    // "importHelpers": true,                 /* Import emit helpers from 'tslib'. */
    // "downlevelIteration": true,            /* Provide full support for iterables in 'for-of', spread, and destructuring when targeting 'ES5' or 'ES3'. */
    // "isolatedModules": true,               /* Transpile each file as a separate module (similar to 'ts.transpileModule'). */

    /* Strict Type-Checking Options */
    "strict": true,                           /* Enable all strict type-checking options. */
    // "noImplicitAny": true,                 /* Raise error on expressions and declarations with an implied 'any' type. */
    // "strictNullChecks": true,              /* Enable strict null checks. */
    // "strictFunctionTypes": true,           /* Enable strict checking of function types. */
    // "strictBindCallApply": true,           /* Enable strict 'bind', 'call', and 'apply' methods on functions. */
    // "strictPropertyInitialization": true,  /* Enable strict checking of property initialization in classes. */
    // "noImplicitThis": true,                /* Raise error on 'this' expressions with an implied 'any' type. */
    // "alwaysStrict": true,                  /* Parse in strict mode and emit "use strict" for each source file. */

    /* Additional Checks */
    // "noUnusedLocals": true,                /* Report errors on unused locals. */
    // "noUnusedParameters": true,            /* Report errors on unused parameters. */
    // "noImplicitReturns": true,             /* Report error when not all code paths in function return a value. */
    // "noFallthroughCasesInSwitch": true,    /* Report errors for fallthrough cases in switch statement. */

    /* Module Resolution Options */
    "moduleResolution": "node",               /* Specify module resolution strategy: 'node' (Node.js) or 'classic' (TypeScript pre-1.6). */
    // "baseUrl": "./",                       /* Base directory to resolve non-absolute module names. */
    // "paths": {},                           /* A series of entries which re-map imports to lookup locations relative to the 'baseUrl'. */
    // "rootDirs": [],                        /* List of root folders whose combined content represents the structure of the project at runtime. */
    "typeRoots": [                            /* List of folders to include type definitions from. */
      "node_modules/@types"
    ],
    // "types": [],                           /* Type declaration files to be included in compilation. */
    // "allowSyntheticDefaultImports": true,  /* Allow default imports from modules with no default export. This does not affect code emit, just typechecking. */
    "esModuleInterop": true,                  /* Enables emit interoperability between CommonJS and ES Modules via creation of namespace objects for all imports. Implies 'allowSyntheticDefaultImports'. */
    // "preserveSymlinks": true,              /* Do not resolve the real path of symlinks. */
    // "allowUmdGlobalAccess": true,          /* Allow accessing UMD globals from modules. */

    /* Source Map Options */
    // "sourceRoot": "",                      /* Specify the location where debugger should locate TypeScript files instead of source locations. */
    // "mapRoot": "",                         /* Specify the location where debugger should locate map files instead of generated locations. */
    // "inlineSourceMap": true,               /* Emit a single file with source maps instead of having a separate file. */
    // "inlineSources": true,                 /* Emit the source alongside the sourcemaps within a single file; requires '--inlineSourceMap' or '--sourceMap' to be set. */

    /* Experimental Options */
    // "experimentalDecorators": true,        /* Enables experimental support for ES7 decorators. */
    // "emitDecoratorMetadata": true,         /* Enables experimental support for emitting type metadata for decorators. */

    /* Command Line */
    "preserveWatchOutput": true,              /* Whether to keep outdated console output in watch mode instead of clearing the screen every time a change happened. */

    /* Advanced Options */
    "forceConsistentCasingInFileNames": true, /* Disallow inconsistently-cased references to the same file. */
    // "listFiles": true                      /* Print names of files part of the compilation. */
    // "extendedDiagnostics": true            /* You can use this flag to discover where TypeScript is spending it’s time when compiling. */
  }
}

webpack.bat

@node node_modules\webpack\bin\webpack.js %*

webpack.config.js

// https://webpack.js.org/configuration/

const path = require('path')

module.exports = {
  target: 'node',
  mode: 'none',
  entry: {
    main: './main.ts' // requires './'
  },
  output: {
    path: path.join(__dirname, '/javascript-built-by-webpack/'), // path.join, not path.resolve!
    filename: '[name]-built.js'
  },
  module: {
    rules: [
      {
        exclude: '/node_modules/',
        use: [
          {
            loader: 'ts-loader',
            options: {
              configFile: 'tsconfig.json'
            }
          }
        ],
        test: /\.tsx?$/
      }
    ]
  },
  resolve: {
    extensions: ['.js', '.json', '.jsx', '.css', '.ts', '.tsx']
  },
  devtool: 'source-map'
}