Add declaration files

packages/next/build/webpack/loaders/next-minify-loader.ts

@@ -8,7 +8,7 @@ const nextMiniferLoader: loader.Loader = function(source) {
   const options = loaderUtils.getOptions(this) || {}
   const { error, code } = minify({
     file: 'noop',
-    input: source,
+    input: source as string,
     terserOptions: { ...options.terserOptions, sourceMap: false },
   })
 

packages/next/build/webpack/plugins/build-manifest-plugin.js → packages/next/build/webpack/plugins/build-manifest-plugin.ts

@@ -1,3 +1,4 @@
+import { Compiler } from 'webpack'
 import { RawSource } from 'webpack-sources'
 import {
   BUILD_MANIFEST,
@@ -9,19 +10,19 @@ import {
 // This plugin creates a build-manifest.json for all assets that are being output
 // It has a mapping of "entry" filename to real filename. Because the real filename can be hashed in production
 export default class BuildManifestPlugin {
-  apply (compiler) {
+  apply (compiler: Compiler) {
     compiler.hooks.emit.tapAsync(
       'NextJsBuildManifest',
       (compilation, callback) => {
         const { chunks } = compilation
-        const assetMap = { devFiles: [], pages: {} }
+        const assetMap: { devFiles: string[], pages: { [page: string]: string[] } } = { devFiles: [], pages: {} }
 
         const mainJsChunk = chunks.find(
           c => c.name === CLIENT_STATIC_FILES_RUNTIME_MAIN
         )
-        const mainJsFiles =
+        const mainJsFiles: string[] =
           mainJsChunk && mainJsChunk.files.length > 0
-            ? mainJsChunk.files.filter(file => /\.js$/.test(file))
+            ? mainJsChunk.files.filter((file: string) => /\.js$/.test(file))
             : []
 
         for (const filePath of Object.keys(compilation.assets)) {
@@ -44,7 +45,7 @@ export default class BuildManifestPlugin {
             continue
           }
 
-          const filesForEntry = []
+          const filesForEntry: string[] = []
           for (const chunk of entrypoint.chunks) {
             // If there's no name or no files
             if (!chunk.name || !chunk.files) {
@@ -83,7 +84,7 @@ export default class BuildManifestPlugin {
         assetMap.pages = Object.keys(assetMap.pages)
           .sort()
           // eslint-disable-next-line
-          .reduce((a, c) => ((a[c] = assetMap.pages[c]), a), {})
+          .reduce((a, c) => ((a[c] = assetMap.pages[c]), a), {} as any)
 
         compilation.assets[BUILD_MANIFEST] = new RawSource(
           JSON.stringify(assetMap, null, 2)

packages/next/build/webpack/plugins/chunk-names-plugin.js → packages/next/build/webpack/plugins/chunk-names-plugin.ts

@@ -1,14 +1,15 @@
+import { Compiler } from 'webpack'
 // This plugin mirrors webpack 3 `filename` and `chunkfilename` behavior
 // This fixes https://github.com/webpack/webpack/issues/6598
 // This plugin is based on https://github.com/researchgate/webpack/commit/2f28947fa0c63ccbb18f39c0098bd791a2c37090
 export default class ChunkNamesPlugin {
-  apply (compiler) {
-    compiler.hooks.compilation.tap('NextJsChunkNamesPlugin', (compilation) => {
+  apply (compiler: Compiler) {
+    compiler.hooks.compilation.tap('NextJsChunkNamesPlugin', (compilation: any) => {
       compilation.chunkTemplate.hooks.renderManifest.intercept({
-        register (tapInfo) {
+        register (tapInfo: any) {
           if (tapInfo.name === 'JavascriptModulesPlugin') {
             const originalMethod = tapInfo.fn
-            tapInfo.fn = (result, options) => {
+            tapInfo.fn = (result: any, options: any) => {
               let filenameTemplate
               const chunk = options.chunk
               const outputOptions = options.outputOptions

packages/next/build/webpack/plugins/nextjs-ssr-import.js → packages/next/build/webpack/plugins/nextjs-ssr-import.ts

@@ -1,11 +1,12 @@
 import { join, resolve, relative, dirname } from 'path'
+import { Compiler } from 'webpack'
 
 // This plugin modifies the require-ensure code generated by Webpack
 // to work with Next.js SSR
 export default class NextJsSsrImportPlugin {
-  apply (compiler) {
-    compiler.hooks.compilation.tap('NextJsSSRImport', (compilation) => {
-      compilation.mainTemplate.hooks.requireEnsure.tap('NextJsSSRImport', (code, chunk) => {
+  apply (compiler: Compiler) {
+    compiler.hooks.compilation.tap('NextJsSSRImport', (compilation: any) => {
+      compilation.mainTemplate.hooks.requireEnsure.tap('NextJsSSRImport', (code: string, chunk: any) => {
         // Update to load chunks from our custom chunks directory
         const outputPath = resolve('/')
         const pagePath = join('/', dirname(chunk.name))

packages/next/build/webpack/plugins/nextjs-ssr-module-cache.js → packages/next/build/webpack/plugins/nextjs-ssr-module-cache.ts

@@ -16,10 +16,12 @@ const SSR_MODULE_CACHE_FILENAME = 'ssr-module-cache.js'
 // Do note that this module is only geared towards the `node` compilation target.
 // For the client side compilation we use `runtimeChunk: 'single'`
 export default class NextJsSsrImportPlugin {
-  constructor (options) {
+  private options: { outputPath: string }
+
+  constructor (options: { outputPath: string }) {
     this.options = options
   }
-  apply (compiler) {
+  apply (compiler: webpack.Compiler) {
     const { outputPath } = this.options
     compiler.hooks.emit.tapAsync('NextJsSSRModuleCache', (compilation, callback) => {
       compilation.assets[SSR_MODULE_CACHE_FILENAME] = new RawSource(`
@@ -28,12 +30,12 @@ export default class NextJsSsrImportPlugin {
       `)
       callback()
     })
-    compiler.hooks.compilation.tap('NextJsSSRModuleCache', (compilation) => {
+    compiler.hooks.compilation.tap('NextJsSSRModuleCache', (compilation: any) => {
       compilation.mainTemplate.hooks.localVars.intercept({
-        register (tapInfo) {
+        register (tapInfo: any) {
           if (tapInfo.name === 'MainTemplate') {
             const originalFn = tapInfo.fn
-            tapInfo.fn = (source, chunk) => {
+            tapInfo.fn = (source: any, chunk: any) => {
               // If the chunk is not part of the pages directory we have to keep the original behavior,
               // otherwise webpack will error out when the file is used before the compilation finishes
               // this is the case with mini-css-extract-plugin
@@ -46,7 +48,7 @@ export default class NextJsSsrImportPlugin {
               // Make sure even in windows, the path looks like in unix
               // Node.js require system will convert it accordingly
               const relativePathToBaseDirNormalized = relativePathToBaseDir.replace(/\\/g, '/')
-              return webpack.Template.asString([
+              return (webpack as any).Template.asString([
                 source,
                 '// The module cache',
                 `var installedModules = require('${relativePathToBaseDirNormalized}');`

packages/next/build/webpack/plugins/react-loadable-plugin.js → packages/next/build/webpack/plugins/react-loadable-plugin.ts

@@ -22,21 +22,22 @@ WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWAR
 // Modified to strip out unneeded results for Next's specific use case
 
 import url from 'url'
+import { Compiler, compilation } from 'webpack'
 
-function buildManifest (compiler, compilation) {
+function buildManifest (compiler: Compiler, compilation: compilation.Compilation) {
   let context = compiler.options.context
-  let manifest = {}
+  let manifest: { [k: string]: any[] } = {}
 
   compilation.chunkGroups.forEach(chunkGroup => {
     if (chunkGroup.isInitial()) {
       return
     }
 
-    chunkGroup.origins.forEach(chunkGroupOrigin => {
+    chunkGroup.origins.forEach((chunkGroupOrigin: any) => {
       const { request } = chunkGroupOrigin
 
-      chunkGroup.chunks.forEach(chunk => {
-        chunk.files.forEach(file => {
+      chunkGroup.chunks.forEach((chunk: any) => {
+        chunk.files.forEach((file: string) => {
           if (!file.match(/\.js$/) || !file.match(/^static\/chunks\//)) {
             return
           }
@@ -76,18 +77,19 @@ function buildManifest (compiler, compilation) {
 
   manifest = Object.keys(manifest)
     .sort()
-    // eslint-disable-next-line
-    .reduce((a, c) => ((a[c] = manifest[c]), a), {})
+    .reduce((a, c) => ((a[c] = manifest[c]), a), {} as any)
 
   return manifest
 }
 
 export class ReactLoadablePlugin {
-  constructor (opts = {}) {
+  private filename: string
+
+  constructor (opts: { filename: string }) {
     this.filename = opts.filename
   }
 
-  apply (compiler) {
+  apply (compiler: Compiler) {
     compiler.hooks.emit.tapAsync(
       'ReactLoadableManifest',
       (compilation, callback) => {

packages/next/build/webpack/plugins/terser-webpack-plugin/src/index.d.ts

@@ -0,0 +1,14 @@
+export class TerserPlugin {
+  readonly cpus: any
+  readonly distDir: any
+  readonly options: any
+
+  constructor(options?: any)
+
+  static isSourceMap(input: any): any
+  static buildSourceMap(inputSourceMap: any): any
+  static buildError(err: any, file: any, sourceMap: any, requestShortener?: any): any
+  static buildWarning(warning: any, file: any, sourceMap: any, requestShortener?: any, warningsFilter?: any): any
+
+  apply(compiler: any): void
+}

packages/next/build/webpack/plugins/terser-webpack-plugin/src/minify.js → packages/next/build/webpack/plugins/terser-webpack-plugin/src/minify.ts

@@ -1,7 +1,7 @@
 /* eslint-disable
   arrow-body-style
 */
-import { minify as terser } from 'terser';
+import { minify as terser, MinifyOptions } from 'terser';
 
 const buildTerserOptions = ({
   ecma,
@@ -18,7 +18,7 @@ const buildTerserOptions = ({
   keep_fnames,
   /* eslint-enable camelcase */
   safari10,
-} = {}) => ({
+}: MinifyOptions = {}) => ({
   ecma,
   warnings,
   parse: { ...parse },
@@ -45,15 +45,15 @@ const buildTerserOptions = ({
   safari10,
 });
 
-const minify = (options) => {
+const minify = (options: { file: string, input: string, inputSourceMap?: string, terserOptions?: MinifyOptions }) => {
   const {
     file,
     input,
     inputSourceMap
   } = options;
 
   // Copy terser options
-  const terserOptions = buildTerserOptions(options.terserOptions);
+  const terserOptions = buildTerserOptions(options.terserOptions) as any;
 
   // Add source map data
   if (inputSourceMap) {

packages/next/client/dev-error-overlay/format-webpack-messages.d.ts

@@ -0,0 +1 @@
+export default function formatWebpackMessages(json: any): any;

packages/next/export/index.d.ts

@@ -0,0 +1 @@
+export default function(dir: string, options: any, configuration?: any): Promise<void>

packages/next/package.json

@@ -29,8 +29,9 @@
   "scripts": {
     "build": "taskr",
     "release": "taskr release",
-    "prepublish": "npm run release",
-    "typescript": "tsc --noEmit"
+    "prepublish": "npm run release && npm run types",
+    "typescript": "tsc --noEmit --declaration",
+    "types": "tsc --declaration --emitDeclarationOnly --declarationDir dist"
   },
   "taskr": {
     "requires": [

packages/next/server/lib/start-server.js → packages/next/server/lib/start-server.ts

@@ -1,7 +1,7 @@
 import http from 'http'
 import next from '../next'
 
-export default async function start (serverOptions, port, hostname) {
+export default async function start(serverOptions: any, port?: number, hostname?: string) {
   const app = next(serverOptions)
   const srv = http.createServer(app.getRequestHandler())
   await new Promise((resolve, reject) => {

packages/next/server/lib/utils.js → packages/next/server/lib/utils.ts

@@ -1,5 +1,6 @@
-export function printAndExit (message, code = 1) {
+export function printAndExit(message: string, code = 1) {
   if (code === 0) {
+    // tslint:disable-next-line no-console
     console.log(message)
   } else {
     console.error(message)

packages/next/server/next.d.ts

@@ -0,0 +1 @@
+export default function(options: any): any

packages/next/server/next.js

@@ -1,5 +1,5 @@
 // This file is used for when users run `require('next')`
-module.exports = (options) => {
+module.exports = options => {
   if (options.dev) {
     const Server = require('./next-dev-server').default
     return new Server(options)

packages/next/tsconfig.json

@@ -1,8 +1,6 @@
 {
   "compilerOptions": {
     "strict": true,
-    "allowJs": true,
-    "noEmit": true,
     "module": "esnext",
     "target": "ES2017",
     "esModuleInterop": true,

packages/next/types/index.d.ts

@@ -57,6 +57,16 @@ declare module 'next/dist/compiled/resolve/index.js' {
   export = resolve;
 }
 
+declare module 'next/dist/compiled/text-table' {
+  function textTable(rows: Array<Array<{}>>, opts?: {
+    hsep?: string,
+    align?: Array<'l' | 'r' | 'c' | '.'>,
+    stringLength?(str: string): number
+  }): string;
+
+  export = textTable;
+}
+
 declare module 'next/dist/compiled/arg/index.js' {
   function arg<T extends arg.Spec>(spec: T, options?: {argv?: string[], permissive?: boolean}): arg.Result<T>;