Webpack 4: Cannot create declaration file

[lihaibh]

Im trying to bundle a library i wrote with webpack and create the following files:

./dist
     - index.js // for easy lookup - no minification - with sourcemap
     - index.min.js // for production - with minification - with sourcemap
     - index.d.ts // for debugging for Typescript applciations

my library has all its sources in: ./src/*

I have a file ./src/index.ts that exports what i want to export for my consumers and i want to compile this file and create the files i mentioned above.

The problem is that it succeed to create the source files, but the declaration file (index.d.ts) is missing, though i added the option: "declaration: true" in tsconfig.json.

Reproduce

im running the command:

webpack -d --env.NODE_ENV=develop

here is my webpack configuration file:

var nodeExternals = require('webpack-node-externals');
var WebpackBuildNotifierPlugin = require('webpack-build-notifier');
var webpack = require('webpack');
var path = require('path');

var envData = {
    'develop': {
        out: 'index.js'
    },
    'production': {
        out: 'index.min.js'
    }
};

var webpack_opts = (env) => ({
    entry: ["./src/index.ts"],
    target: 'node',
    output: {
        filename: `${envData[env.NODE_ENV].out}`,
        libraryTarget: "commonjs2"
    },
    resolve: {
        extensions: ['.ts', '.js'],
        alias: {
            '@lib': path.resolve(__dirname, 'src/')
        }
    },
    plugins: [
        new WebpackBuildNotifierPlugin({
            title: 'Webpack Build'
        })
    ],
    devtool: 'inline-source-map',
    module: {
        rules: [{
            test: /\.tsx?$/,
            loader: "awesome-typescript-loader"
        }]
    }
});

module.exports = webpack_opts;

and my tsconfig.json file:

{
  "compilerOptions": {
    "target": "es5",
    "baseUrl": "./",
    "lib": [
      "es2015",
      "dom",
      "es6",
      "esnext"
    ],
    "types": [
      "jest",
      "node",
      "lodash",
      "reflect-metadata"
    ],
    "paths": {
      "@lib/*": [
        "src/*"
      ]
    },
    "module": "commonjs",
    "moduleResolution": "node",
    "sourceMap": true,
    "experimentalDecorators": true,
    "emitDecoratorMetadata": true,
    "declaration": true,
    "outDir": "build",
    "typeRoots": [
      "node_modules/@types"
    ]
  },
  "include": [
    "src/**/*.ts"
  ],
  "files": [
    "src/index.ts"
  ],
  "exclude": [
    "node_modules"
  ]
}

Additional info:

Webpack version: 4.2.0 awesome-typescript-loader-version: 4.0.1 nodejs version: 9.5.0 npm version: 5.6.0

[petrkoutnysw]

Have you made any progress with that please?