Publish

- @now/node-server@0.6.1-canary.0
 - @now/node@0.6.1-canary.0

.eslintignore

@@ -4,5 +4,8 @@
 /packages/now-go/go/*
 /packages/now-build-utils/dist/*
 /packages/now-node/dist/*
+/packages/now-next/dist/*
 /packages/now-node-bridge/*
 /packages/now-python/*
+/packages/now-optipng/dist/*
+/packages/now-go/*

.eslintrc

@@ -8,7 +8,7 @@
   },
   "overrides": [
     {
-      "files": ["test/**"],
+      "files": ["**/test/**"],
       "rules": {
         "import/no-extraneous-dependencies": 0
       },

.prettierrc.json

@@ -1,3 +1,4 @@
 {
-  "singleQuote": true
+  "singleQuote": true,
+  "trailingComma": "es5"
 }

CODE_OF_CONDUCT.md

@@ -0,0 +1,74 @@
+## Code of Conduct
+
+### Our Pledge
+
+In the interest of fostering an open and welcoming environment, we as
+contributors and maintainers pledge to making participation in our project and
+our community a harassment-free experience for everyone, regardless of age, body
+size, disability, ethnicity, gender identity and expression, level of experience,
+nationality, personal appearance, race, religion, or sexual identity and
+orientation.
+
+### Our Standards
+
+Examples of behavior that contributes to creating a positive environment
+include:
+
+- Using welcoming and inclusive language
+- Being respectful of differing viewpoints and experiences
+- Gracefully accepting constructive criticism
+- Focusing on what is best for the community
+- Showing empathy towards other community members
+
+Examples of unacceptable behavior by participants include:
+
+- The use of sexualized language or imagery and unwelcome sexual attention or
+  advances
+- Trolling, insulting/derogatory comments, and personal or political attacks
+- Public or private harassment
+- Publishing others' private information, such as a physical or electronic
+  address, without explicit permission
+- Other conduct which could reasonably be considered inappropriate in a
+  professional setting
+
+### Our Responsibilities
+
+Project maintainers are responsible for clarifying the standards of acceptable
+behavior and are expected to take appropriate and fair corrective action in
+response to any instances of unacceptable behavior.
+
+Project maintainers have the right and responsibility to remove, edit, or
+reject comments, commits, code, wiki edits, issues, and other contributions
+that are not aligned to this Code of Conduct, or to ban temporarily or
+permanently any contributor for other behaviors that they deem inappropriate,
+threatening, offensive, or harmful.
+
+### Scope
+
+This Code of Conduct applies both within project spaces and in public spaces
+when an individual is representing the project or its community. Examples of
+representing a project or community include using an official project e-mail
+address, posting via an official social media account, or acting as an appointed
+representative at an online or offline event. Representation of a project may be
+further defined and clarified by project maintainers.
+
+### Enforcement
+
+Instances of abusive, harassing, or otherwise unacceptable behavior may be
+reported by contacting the project team at [abuse@zeit.co](mailto:abuse@zeit.co). All
+complaints will be reviewed and investigated and will result in a response that
+is deemed necessary and appropriate to the circumstances. The project team is
+obligated to maintain confidentiality with regard to the reporter of an incident.
+Further details of specific enforcement policies may be posted separately.
+
+Project maintainers who do not follow or enforce the Code of Conduct in good
+faith may face temporary or permanent repercussions as determined by other
+members of the project's leadership.
+
+### Attribution
+
+This Code of Conduct is adapted from the [Contributor Covenant][homepage], version 1.4,
+available at [http://contributor-covenant.org/version/1/4][version]
+
+[homepage]: http://contributor-covenant.org
+[version]: http://contributor-covenant.org/version/1/4/

jest.config.js

@@ -1,4 +1,8 @@
 module.exports = {
   testEnvironment: 'node',
-  collectCoverageFrom: ['packages/**/*.{js,jsx}', '!**/node_modules/**'],
+  collectCoverageFrom: [
+    'packages/(!test)/**/*.{js,jsx}',
+    '!**/node_modules/**',
+    '!**/test/**',
+  ],
 };

package.json

@@ -27,6 +27,10 @@
       "prettier --write",
       "eslint --fix",
       "git add"
+    ],
+    "*.ts": [
+      "prettier --write",
+      "git add"
     ]
   },
   "devDependencies": {

packages/now-bash/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@now/bash",
-  "version": "0.1.5-canary.1",
+  "version": "0.2.0",
   "description": "Now 2.0 builder for HTTP endpoints written in Bash",
   "main": "index.js",
   "author": "Nathan Rajlich <nate@zeit.co>",

packages/now-build-utils/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@now/build-utils",
-  "version": "0.4.41-canary.5",
+  "version": "0.5.1",
   "license": "MIT",
   "main": "./dist/index.js",
   "types": "./dist/index.d.js",

packages/now-build-utils/src/fs/download.ts

@@ -1,7 +1,7 @@
 import path from 'path';
 import FileFsRef from '../file-fs-ref';
-import { File, Files } from '../types';
-import { mkdirp, readlink, symlink } from 'fs-extra';
+import { File, Files, Meta } from '../types';
+import { remove, mkdirp, readlink, symlink } from 'fs-extra';
 
 export interface DownloadedFiles {
   [filePath: string]: FileFsRef
@@ -29,13 +29,31 @@ async function downloadFile(file: File, fsPath: string): Promise<FileFsRef> {
   }
 }
 
-export default async function download(files: Files, basePath: string): Promise<DownloadedFiles> {
+async function removeFile(basePath: string, fileMatched: string) {
+  const file = path.join(basePath, fileMatched);
+  await remove(file);
+}
+
+export default async function download(files: Files, basePath: string, meta?: Meta): Promise<DownloadedFiles> {
   const files2: DownloadedFiles = {};
+  const { filesChanged = null, filesRemoved = null } = meta || {};
 
   await Promise.all(
     Object.keys(files).map(async (name) => {
+      // If the file does not exist anymore, remove it.
+      if (Array.isArray(filesRemoved) && filesRemoved.includes(name)) {
+        await removeFile(basePath, name);
+        return;
+      }
+
+      // If a file didn't change, do not re-download it.
+      if (Array.isArray(filesChanged) && !filesChanged.includes(name)) {
+        return;
+      }
+
       const file = files[name];
       const fsPath = path.join(basePath, name);
+
       files2[name] = await downloadFile(file, fsPath);
     }),
   );

packages/now-build-utils/src/fs/run-user-scripts.ts

@@ -112,7 +112,11 @@ export async function installDependencies(destPath: string, args: string[] = [])
   }
 }
 
-export async function runPackageJsonScript(destPath: string, scriptName: string) {
+export async function runPackageJsonScript(
+  destPath: string,
+  scriptName: string,
+  opts?: SpawnOptions
+) {
   assert(path.isAbsolute(destPath));
   const { hasScript, hasPackageLockJson } = await scanParentDirs(
     destPath,
@@ -122,10 +126,10 @@ export async function runPackageJsonScript(destPath: string, scriptName: string)
 
   if (hasPackageLockJson) {
     console.log(`running "npm run ${scriptName}"`);
-    await spawnAsync('npm', ['run', scriptName], destPath);
+    await spawnAsync('npm', ['run', scriptName], destPath, opts);
   } else {
     console.log(`running "yarn run ${scriptName}"`);
-    await spawnAsync('yarn', ['--cwd', destPath, 'run', scriptName], destPath);
+    await spawnAsync('yarn', ['--cwd', destPath, 'run', scriptName], destPath, opts);
   }
 
   return true;

packages/now-build-utils/src/index.ts

@@ -1,7 +1,7 @@
 import FileBlob from './file-blob';
 import FileFsRef from './file-fs-ref';
 import FileRef from './file-ref';
-import { File, Files, AnalyzeOptions, BuildOptions, PrepareCacheOptions, ShouldServeOptions } from './types';
+import { File, Files, AnalyzeOptions, BuildOptions, PrepareCacheOptions, ShouldServeOptions, Meta } from './types';
 import { Lambda, createLambda } from './lambda';
 import download from './fs/download';
 import getWriteableDirectory from './fs/get-writable-directory'
@@ -17,6 +17,7 @@ export {
     FileRef,
     Files,
     File,
+    Meta,
     Lambda,
     createLambda,
     download,

packages/now-build-utils/src/types.ts

@@ -1,24 +1,38 @@
+import FileRef from './file-ref';
 import FileFsRef from './file-fs-ref';
 
 export interface File {
   type: string;
   mode: number;
   toStream: () => NodeJS.ReadableStream;
+  /**
+   * The absolute path to the file in the filesystem
+   */
+  fsPath?: string;
 }
 
 export interface Files {
-  [filePath: string]: File
+  [filePath: string]: File;
 }
 
 export interface Config {
-  [key: string]: string
+  [key: string]: string;
+}
+
+export interface Meta {
+  isDev?: boolean;
+  requestPath?: string;
+  filesChanged?: string[];
+  filesRemoved?: string[];
 }
 
 export interface AnalyzeOptions {
   /**
    * All source files of the project
    */
-  files: Files;
+  files: {
+    [filePath: string]: FileRef;
+  };
 
   /**
    * Name of entrypoint file for this particular build job. Value
@@ -41,7 +55,6 @@ export interface AnalyzeOptions {
   config: Config;
 }
 
-
 export interface BuildOptions {
   /**
    * All source files of the project
@@ -67,6 +80,13 @@ export interface BuildOptions {
    * in `now.json`.
    */
   config: Config;
+
+  /**
+   * Metadata related to the invoker of the builder, used by `now dev`.
+   * Builders may use the properties on this object to change behavior based
+   * on the build environment.
+   */
+  meta?: Meta;
 }
 
 export interface PrepareCacheOptions {
@@ -107,6 +127,7 @@ export interface ShouldServeOptions {
    * A path string from a request.
    */
   requestPath: string;
+
   /**
    * Name of entrypoint file for this particular build job. Value
    * `files[entrypoint]` is guaranteed to exist and be a valid File reference.
@@ -114,12 +135,20 @@ export interface ShouldServeOptions {
    * expanded into separate builds at deployment time.
    */
   entrypoint: string;
+
   /**
    * All source files of the project
    */
   files: {
-    [path: string]: FileFsRef
+    [path: string]: FileFsRef;
   };
+
+  /**
+   * A writable temporary directory where you are encouraged to perform your
+   * build process. This directory will be populated with the restored cache.
+   */
+  workPath: string;
+
   /**
    * An arbitrary object passed by the user in the build definition defined
    * in `now.json`.

packages/now-cgi/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@now/cgi",
-  "version": "0.0.16-canary.0",
+  "version": "0.1.0",
   "license": "MIT",
   "repository": {
     "type": "git",

packages/now-go/.gitignore

@@ -1,5 +1,6 @@
 node_modules
 *.log
-/?.js
 /go
-/get-exported-function-name
+/analyze
+*.js
+!util/install.js

packages/now-go/.npmignore

@@ -0,0 +1,5 @@
+*.ts
+test
+tsconfig.json
+package-lock.json
+yarn.lock

packages/now-go/go-helpers.js

@@ -1,129 +0,0 @@
-const tar = require('tar');
-const execa = require('execa');
-const fetch = require('node-fetch');
-const { mkdirp } = require('fs-extra');
-const { dirname, join } = require('path');
-const debug = require('debug')('@now/go:go-helpers');
-
-const archMap = new Map([['x64', 'amd64'], ['x86', '386']]);
-const platformMap = new Map([['win32', 'windows']]);
-
-// Location where the `go` binary will be installed after `postinstall`
-const GO_DIR = join(__dirname, 'go');
-const GO_BIN = join(GO_DIR, 'bin/go');
-
-const getPlatform = p => platformMap.get(p) || p;
-const getArch = a => archMap.get(a) || a;
-const getGoUrl = (version, platform, arch) => {
-  const goArch = getArch(arch);
-  const goPlatform = getPlatform(platform);
-  const ext = platform === 'win32' ? 'zip' : 'tar.gz';
-  return `https://dl.google.com/go/go${version}.${goPlatform}-${goArch}.${ext}`;
-};
-
-async function getExportedFunctionName(filePath) {
-  debug('Detecting handler name for %o', filePath);
-  const bin = join(__dirname, 'get-exported-function-name');
-  const args = [filePath];
-  const name = await execa.stdout(bin, args);
-  debug('Detected exported name %o', name);
-  return name;
-}
-
-// Creates a `$GOPATH` directory tree, as per `go help gopath` instructions.
-// Without this, `go` won't recognize the `$GOPATH`.
-function createGoPathTree(goPath, platform, arch) {
-  const tuple = `${getPlatform(platform)}_${getArch(arch)}`;
-  debug('Creating GOPATH directory structure for %o (%s)', goPath, tuple);
-  return Promise.all([
-    mkdirp(join(goPath, 'bin')),
-    mkdirp(join(goPath, 'pkg', tuple)),
-  ]);
-}
-
-async function get({ src } = {}) {
-  const args = ['get'];
-  if (src) {
-    debug('Fetching `go` dependencies for file %o', src);
-    args.push(src);
-  } else {
-    debug('Fetching `go` dependencies for cwd %o', this.cwd);
-  }
-  await this(...args);
-}
-
-async function build({ src, dest }) {
-  debug('Building `go` binary %o -> %o', src, dest);
-  let sources;
-  if (Array.isArray(src)) {
-    sources = src;
-  } else {
-    sources = [src];
-  }
-  await this('build', '-o', dest, ...sources);
-}
-
-async function createGo(
-  goPath,
-  platform = process.platform,
-  arch = process.arch,
-  opts = {},
-  goMod = false,
-) {
-  const env = {
-    ...process.env,
-    PATH: `${dirname(GO_BIN)}:${process.env.PATH}`,
-    GOPATH: goPath,
-    ...opts.env,
-  };
-
-  if (goMod) {
-    env.GO111MODULE = 'on';
-  }
-
-  function go(...args) {
-    debug('Exec %o', `go ${args.join(' ')}`);
-    return execa('go', args, { stdio: 'inherit', ...opts, env });
-  }
-  go.cwd = opts.cwd || process.cwd();
-  go.get = get;
-  go.build = build;
-  go.goPath = goPath;
-  await createGoPathTree(goPath, platform, arch);
-  return go;
-}
-
-async function downloadGo(
-  dir = GO_DIR,
-  version = '1.12',
-  platform = process.platform,
-  arch = process.arch,
-) {
-  debug('Installing `go` v%s to %o for %s %s', version, dir, platform, arch);
-
-  const url = getGoUrl(version, platform, arch);
-  debug('Downloading `go` URL: %o', url);
-  const res = await fetch(url);
-
-  if (!res.ok) {
-    throw new Error(`Failed to download: ${url} (${res.status})`);
-  }
-
-  // TODO: use a zip extractor when `ext === "zip"`
-  await mkdirp(dir);
-  await new Promise((resolve, reject) => {
-    res.body
-      .on('error', reject)
-      .pipe(tar.extract({ cwd: dir, strip: 1 }))
-      .on('error', reject)
-      .on('finish', resolve);
-  });
-
-  return createGo(dir, platform, arch);
-}
-
-module.exports = {
-  createGo,
-  downloadGo,
-  getExportedFunctionName,
-};

packages/now-go/go-helpers.ts

@@ -0,0 +1,151 @@
+import tar from 'tar';
+import execa from 'execa';
+import fetch from 'node-fetch';
+import { mkdirp, pathExists } from 'fs-extra';
+import { dirname, join } from 'path';
+import Debug from 'debug';
+
+const debug = Debug('@now/go:go-helpers');
+const archMap = new Map([['x64', 'amd64'], ['x86', '386']]);
+const platformMap = new Map([['win32', 'windows']]);
+
+// Location where the `go` binary will be installed after `postinstall`
+const GO_DIR = join(__dirname, 'go');
+const GO_BIN = join(GO_DIR, 'bin/go');
+
+const getPlatform = (p: string) => platformMap.get(p) || p;
+const getArch = (a: string) => archMap.get(a) || a;
+const getGoUrl = (version: string, platform: string, arch: string) => {
+  const goArch = getArch(arch);
+  const goPlatform = getPlatform(platform);
+  const ext = platform === 'win32' ? 'zip' : 'tar.gz';
+  return `https://dl.google.com/go/go${version}.${goPlatform}-${goArch}.${ext}`;
+};
+
+export async function getAnalyzedEntrypoint(filePath: string) {
+  debug('Analyzing entrypoint %o', filePath);
+  const bin = join(__dirname, 'analyze');
+
+  const isAnalyzeExist = await pathExists(bin);
+  if (!isAnalyzeExist) {
+    const src = join(__dirname, 'util', 'analyze.go');
+    const dest = join(__dirname, 'analyze');
+    const go = await downloadGo();
+    await go.build(src, dest);
+  }
+
+  const args = [filePath];
+  const analyzed = await execa.stdout(bin, args);
+  debug('Analyzed entrypoint %o', analyzed);
+  return analyzed;
+}
+
+// Creates a `$GOPATH` directory tree, as per `go help gopath` instructions.
+// Without this, `go` won't recognize the `$GOPATH`.
+function createGoPathTree(goPath: string, platform: string, arch: string) {
+  const tuple = `${getPlatform(platform)}_${getArch(arch)}`;
+  debug('Creating GOPATH directory structure for %o (%s)', goPath, tuple);
+  return Promise.all([
+    mkdirp(join(goPath, 'bin')),
+    mkdirp(join(goPath, 'pkg', tuple)),
+  ]);
+}
+
+class GoWrapper {
+  private env: { [key: string]: string };
+  private opts: execa.Options;
+
+  constructor(env: { [key: string]: string }, opts: execa.Options = {}) {
+    if (!opts.cwd) {
+      opts.cwd = process.cwd();
+    }
+    this.env = env;
+    this.opts = opts;
+  }
+
+  private execute(...args: string[]) {
+    const { opts, env } = this;
+    debug('Exec %o', `go ${args.join(' ')}`);
+    return execa('go', args, { stdio: 'inherit', ...opts, env });
+  }
+
+  mod() {
+    return this.execute('mod', 'tidy');
+  }
+
+  get(src?: string) {
+    const args = ['get'];
+    if (src) {
+      debug('Fetching `go` dependencies for file %o', src);
+      args.push(src);
+    } else {
+      debug('Fetching `go` dependencies for cwd %o', this.opts.cwd);
+    }
+    return this.execute(...args);
+  }
+
+  build(src: string | string[], dest: string, ldsflags = '-s -w') {
+    debug('Building optimized `go` binary %o -> %o', src, dest);
+    const sources = Array.isArray(src) ? src : [src];
+    return this.execute('build', '-ldflags', ldsflags, '-o', dest, ...sources);
+  }
+}
+
+export async function createGo(
+  goPath: string,
+  platform = process.platform,
+  arch = process.arch,
+  opts: execa.Options = {},
+  goMod = false
+) {
+  const path = `${dirname(GO_BIN)}:${process.env.PATH}`;
+  const env: { [key: string]: string } = {
+    ...process.env,
+    PATH: path,
+    GOPATH: goPath,
+    ...opts.env,
+  };
+  if (goMod) {
+    env.GO111MODULE = 'on';
+  }
+  await createGoPathTree(goPath, platform, arch);
+  return new GoWrapper(env, opts);
+}
+
+export async function downloadGo(
+  dir = GO_DIR,
+  version = '1.12',
+  platform = process.platform,
+  arch = process.arch
+) {
+  debug('Installing `go` v%s to %o for %s %s', version, dir, platform, arch);
+
+  const url = getGoUrl(version, platform, arch);
+
+  // if we found GOPATH in ENV, use it
+  if (process.env.GOPATH !== undefined) {
+    return createGo(dir, platform, arch);
+  } else {
+    const isGoExist = await pathExists(join(dir, 'bin'));
+    if (!isGoExist) {
+      debug('Downloading `go` URL: %o', url);
+      console.log('Downloading Go ...');
+      const res = await fetch(url);
+
+      if (!res.ok) {
+        throw new Error(`Failed to download: ${url} (${res.status})`);
+      }
+
+      // TODO: use a zip extractor when `ext === "zip"`
+      await mkdirp(dir);
+      await new Promise((resolve, reject) => {
+        res.body
+          .on('error', reject)
+          .pipe(tar.extract({ cwd: dir, strip: 1 }))
+          .on('error', reject)
+          .on('finish', resolve);
+      });
+    }
+    return createGo(dir, platform, arch);
+  }
+}

packages/now-go/index.ts

@@ -1,52 +1,85 @@
-const { join, sep, dirname } = require('path');
-const {
-  readFile, writeFile, pathExists, move,
-} = require('fs-extra');
+import { join, sep, dirname } from 'path';
+import { readFile, writeFile, pathExists, move } from 'fs-extra';
 
-const glob = require('@now/build-utils/fs/glob.js'); // eslint-disable-line import/no-extraneous-dependencies
-const download = require('@now/build-utils/fs/download.js'); // eslint-disable-line import/no-extraneous-dependencies
-const { createLambda } = require('@now/build-utils/lambda.js'); // eslint-disable-line import/no-extraneous-dependencies
-const getWritableDirectory = require('@now/build-utils/fs/get-writable-directory.js'); // eslint-disable-line import/no-extraneous-dependencies
-const { createGo, getExportedFunctionName } = require('./go-helpers');
+import {
+  glob,
+  download,
+  createLambda,
+  getWriteableDirectory,
+  BuildOptions,
+  shouldServe,
+  Files,
+} from '@now/build-utils';
 
-const config = {
+import { createGo, getAnalyzedEntrypoint } from './go-helpers';
+
+interface Analyzed {
+  packageName: string;
+  functionName: string;
+  watch: string[];
+}
+interface BuildParamsMeta {
+  isDev: boolean | undefined;
+}
+interface BuildParamsType extends BuildOptions {
+  files: Files;
+  entrypoint: string;
+  workPath: string;
+  meta: BuildParamsMeta;
+}
+
+export const version = 2;
+
+export const config = {
   maxLambdaSize: '10mb',
 };
 
-async function build({ files, entrypoint }) {
+export async function build({
+  files,
+  entrypoint,
+  config,
+  meta = {} as BuildParamsMeta,
+}: BuildParamsType) {
   console.log('Downloading user files...');
+  const entrypointArr = entrypoint.split(sep);
 
-  const [goPath, outDir] = await Promise.all([
-    getWritableDirectory(),
-    getWritableDirectory(),
+  let [goPath, outDir] = await Promise.all([
+    getWriteableDirectory(),
+    getWriteableDirectory(),
   ]);
+  if (meta.isDev) {
+    const devGoPath = `dev${entrypointArr[entrypointArr.length - 1]}`;
+    const goPathArr = goPath.split(sep);
+    goPathArr.pop();
+    goPathArr.push(devGoPath);
+    goPath = goPathArr.join(sep);
+  }
 
   const srcPath = join(goPath, 'src', 'lambda');
   const downloadedFiles = await download(files, srcPath);
 
   console.log(`Parsing AST for "${entrypoint}"`);
-  let parseFunctionName;
+  let analyzed: string;
   try {
-    parseFunctionName = await getExportedFunctionName(
-      downloadedFiles[entrypoint].fsPath,
-    );
+    analyzed = await getAnalyzedEntrypoint(downloadedFiles[entrypoint].fsPath);
   } catch (err) {
     console.log(`Failed to parse AST for "${entrypoint}"`);
     throw err;
   }
 
-  if (!parseFunctionName) {
+  if (!analyzed) {
     const err = new Error(
-      `Could not find an exported function in "${entrypoint}"`,
+      `Could not find an exported function in "${entrypoint}"`
     );
     console.log(err.message);
     throw err;
   }
 
-  const handlerFunctionName = parseFunctionName.split(',')[0];
+  const parsedAnalyzed = JSON.parse(analyzed) as Analyzed;
 
+  const handlerFunctionName = parsedAnalyzed.functionName;
   console.log(
-    `Found exported function "${handlerFunctionName}" in "${entrypoint}"`,
+    `Found exported function "${handlerFunctionName}" in "${entrypoint}"`
   );
 
   // we need `main.go` in the same dir as the entrypoint,
@@ -54,7 +87,7 @@ async function build({ files, entrypoint }) {
   const entrypointDirname = dirname(downloadedFiles[entrypoint].fsPath);
 
   // check if package name other than main
-  const packageName = parseFunctionName.split(',')[1];
+  const packageName = parsedAnalyzed.packageName;
   const isGoModExist = await pathExists(join(entrypointDirname, 'go.mod'));
   if (packageName !== 'main') {
     const go = await createGo(
@@ -64,7 +97,7 @@ async function build({ files, entrypoint }) {
       {
         cwd: entrypointDirname,
       },
-      true,
+      true
     );
     if (!isGoModExist) {
       try {
@@ -80,7 +113,7 @@ async function build({ files, entrypoint }) {
     const mainModGoFileName = 'main__mod__.go';
     const modMainGoContents = await readFile(
       join(__dirname, mainModGoFileName),
-      'utf8',
+      'utf8'
     );
 
     let goPackageName = `${packageName}/${packageName}`;
@@ -89,11 +122,10 @@ async function build({ files, entrypoint }) {
     if (isGoModExist) {
       const goModContents = await readFile(
         join(entrypointDirname, 'go.mod'),
-        'utf8',
+        'utf8'
       );
-      goPackageName = `${
-        goModContents.split('\n')[0].split(' ')[1]
-      }/${packageName}`;
+      const usrModName = goModContents.split('\n')[0].split(' ')[1];
+      goPackageName = `${usrModName}/${packageName}`;
     }
 
     const mainModGoContents = modMainGoContents
@@ -103,34 +135,56 @@ async function build({ files, entrypoint }) {
     // write main__mod__.go
     await writeFile(
       join(entrypointDirname, mainModGoFileName),
-      mainModGoContents,
+      mainModGoContents
     );
 
     // move user go file to folder
     try {
       // default path
       let finalDestination = join(entrypointDirname, packageName, entrypoint);
-      const entrypointArr = entrypoint.split(sep);
+      let forceMove = false;
+
+      if (meta.isDev) {
+        forceMove = true;
+      }
 
       // if `entrypoint` include folder, only use filename
       if (entrypointArr.length > 1) {
         finalDestination = join(
           entrypointDirname,
           packageName,
-          entrypointArr.pop(),
+          entrypointArr[entrypointArr.length - 1]
         );
       }
 
-      await move(downloadedFiles[entrypoint].fsPath, finalDestination);
+      await move(downloadedFiles[entrypoint].fsPath, finalDestination, {
+        overwrite: forceMove,
+      });
     } catch (err) {
       console.log('failed to move entry to package folder');
       throw err;
     }
 
-    console.log('tidy go.mod file');
+    if (meta.isDev) {
+      const isGoModBk = await pathExists(join(entrypointDirname, 'go.mod.bk'));
+      if (isGoModBk) {
+        await move(
+          join(entrypointDirname, 'go.mod.bk'),
+          join(entrypointDirname, 'go.mod'),
+          { overwrite: true }
+        );
+        await move(
+          join(entrypointDirname, 'go.sum.bk'),
+          join(entrypointDirname, 'go.sum'),
+          { overwrite: true }
+        );
+      }
+    }
+
+    console.log('Tidy `go.mod` file...');
     try {
       // ensure go.mod up-to-date
-      await go('mod', 'tidy');
+      await go.mod();
     } catch (err) {
       console.log('failed to `go mod tidy`');
       throw err;
@@ -140,11 +194,24 @@ async function build({ files, entrypoint }) {
     const destPath = join(outDir, 'handler');
     try {
       const src = [join(entrypointDirname, mainModGoFileName)];
-      await go.build({ src, dest: destPath });
+      await go.build(src, destPath, config.ldsflags);
     } catch (err) {
       console.log('failed to `go build`');
       throw err;
     }
+    if (meta.isDev) {
+      // caching for `now dev`
+      await move(
+        join(entrypointDirname, 'go.mod'),
+        join(entrypointDirname, 'go.mod.bk'),
+        { overwrite: true }
+      );
+      await move(
+        join(entrypointDirname, 'go.sum'),
+        join(entrypointDirname, 'go.sum.bk'),
+        { overwrite: true }
+      );
+    }
   } else {
     const go = await createGo(
       goPath,
@@ -153,15 +220,15 @@ async function build({ files, entrypoint }) {
       {
         cwd: entrypointDirname,
       },
-      false,
+      false
     );
     const origianlMainGoContents = await readFile(
       join(__dirname, 'main.go'),
-      'utf8',
+      'utf8'
     );
     const mainGoContents = origianlMainGoContents.replace(
       '__NOW_HANDLER_FUNC_NAME',
-      handlerFunctionName,
+      handlerFunctionName
     );
 
     // in order to allow the user to have `main.go`,
@@ -174,6 +241,7 @@ async function build({ files, entrypoint }) {
 
     // `go get` will look at `*.go` (note we set `cwd`), parse the `import`s
     // and download any packages that aren't part of the stdlib
+    console.log('Running `go get`...');
     try {
       await go.get();
     } catch (err) {
@@ -188,7 +256,7 @@ async function build({ files, entrypoint }) {
         join(entrypointDirname, mainGoFileName),
         downloadedFiles[entrypoint].fsPath,
       ];
-      await go.build({ src, dest: destPath });
+      await go.build(src, destPath);
     } catch (err) {
       console.log('failed to `go build`');
       throw err;
@@ -201,10 +269,22 @@ async function build({ files, entrypoint }) {
     runtime: 'go1.x',
     environment: {},
   });
+  const output = {
+    [entrypoint]: lambda,
+  };
+
+  let watch = parsedAnalyzed.watch;
+  // if `entrypoint` located in subdirectory
+  // we will need to concat it with return watch array
+  if (entrypointArr.length > 1) {
+    entrypointArr.pop();
+    watch = parsedAnalyzed.watch.map(file => join(...entrypointArr, file));
+  }
 
   return {
-    [entrypoint]: lambda,
+    output,
+    watch,
   };
 }
 
-module.exports = { config, build };
+export { shouldServe };

packages/now-go/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@now/go",
-  "version": "0.3.1-canary.3",
+  "version": "0.4.2",
   "license": "MIT",
   "repository": {
     "type": "git",
@@ -8,7 +8,9 @@
     "directory": "packages/now-go"
   },
   "scripts": {
-    "postinstall": "node ./util/install"
+    "build": "tsc",
+    "test": "tsc && jest",
+    "prepublish": "tsc"
   },
   "files": [
     "*.js",
@@ -20,8 +22,15 @@
     "debug": "^4.1.1",
     "execa": "^1.0.0",
     "fs-extra": "^7.0.0",
-    "mkdirp-promise": "5.0.1",
     "node-fetch": "^2.2.1",
     "tar": "4.4.6"
+  },
+  "devDependencies": {
+    "@types/debug": "^4.1.3",
+    "@types/execa": "^0.9.0",
+    "@types/fs-extra": "^5.0.5",
+    "@types/node-fetch": "^2.3.0",
+    "@types/tar": "^4.0.0",
+    "typescript": "^3.4.2"
   }
 }

packages/now-go/test/fixtures/03-env-vars/build-env/go.mod

@@ -0,0 +1 @@
+module build-env

packages/now-go/test/fixtures/03-env-vars/build-env/index.go

@@ -0,0 +1,17 @@
+package buildenv
+
+import (
+	"fmt"
+	"net/http"
+	"os"
+)
+
+// Handler function
+func Handler(w http.ResponseWriter, r *http.Request) {
+	rdm := os.Getenv("RANDOMNESS_BUILD_ENV")
+	if rdm == "" {
+		fmt.Println("No build env received")
+	}
+
+	fmt.Fprintf(w, rdm+":build-env")
+}

packages/now-go/test/fixtures/03-env-vars/env/go.mod

@@ -0,0 +1 @@
+module env

packages/now-go/test/fixtures/03-env-vars/env/index.go

@@ -0,0 +1,17 @@
+package env
+
+import (
+	"fmt"
+	"net/http"
+	"os"
+)
+
+// Handler function
+func Handler(w http.ResponseWriter, r *http.Request) {
+	rdm := os.Getenv("RANDOMNESS_ENV")
+	if rdm == "" {
+		fmt.Println("No env received")
+	}
+
+	fmt.Fprintf(w, rdm)
+}

packages/now-go/test/fixtures/03-env-vars/now.json

@@ -0,0 +1,18 @@
+{
+  "version": 2,
+  "builds": [
+    {
+      "src": "env/index.go",
+      "use": "@now/go"
+    }
+  ],
+  "env": {
+    "RANDOMNESS_ENV": "RANDOMNESS_PLACEHOLDER"
+  },
+  "probes": [
+    {
+      "path": "/env",
+      "mustContain": "RANDOMNESS_PLACEHOLDER"
+    }
+  ]
+}

packages/now-go/test/fixtures/06-content-type/index.go

@@ -0,0 +1,11 @@
+package function
+
+import (
+	"fmt"
+	"net/http"
+)
+
+// Handler function
+func Handler(w http.ResponseWriter, r *http.Request) {
+	fmt.Fprintf(w, "RANDOMNESS_PLACEHOLDER")
+}

packages/now-go/test/fixtures/06-content-type/now.json

@@ -0,0 +1,6 @@
+{
+  "version": 2,
+  "builds": [
+    { "src": "index.go", "use": "@now/go" }
+  ]
+}

packages/now-go/test/fixtures/07-content-length/now.json

@@ -0,0 +1,9 @@
+{
+  "version": 2,
+  "builds": [
+    { "src": "*.go", "use": "@now/go" }
+  ],
+  "env": {
+    "RANDOMNESS_ENV_VAR": "RANDOMNESS_PLACEHOLDER"
+  }
+}

packages/now-go/test/fixtures/07-content-length/test1.go

@@ -0,0 +1,16 @@
+package function
+
+import (
+	"net/http"
+	"os"
+	"strconv"
+)
+
+// HandlerTest1 function
+func HandlerTest1(w http.ResponseWriter, r *http.Request) {
+	rdm := os.Getenv("RANDOMNESS_ENV_VAR")
+
+	w.WriteHeader(401)
+	w.Header().Set("content-length", strconv.Itoa(len(rdm+":content-length")))
+	w.Write([]byte(rdm + ":content-length"))
+}

packages/now-go/test/fixtures/07-content-length/test2.go

@@ -0,0 +1,12 @@
+package function
+
+import (
+	"net/http"
+)
+
+// HandlerTest2 function
+func HandlerTest2(w http.ResponseWriter, r *http.Request) {
+	w.Header().Set("Content-Length", "2")
+	w.WriteHeader(401)
+	w.Write([]byte(""))
+}

packages/now-go/test/fixtures/07-content-length/test3.go

@@ -0,0 +1,13 @@
+package function
+
+import (
+	"net/http"
+	"os"
+)
+
+// HandlerTest3 function
+func HandlerTest3(w http.ResponseWriter, r *http.Request) {
+	rev := os.Getenv("RANDOMNESS_ENV_VAR")
+	w.WriteHeader(401)
+	w.Write([]byte(rev + ":content-length"))
+}

packages/now-go/tsconfig.json

@@ -0,0 +1,18 @@
+{
+  "compilerOptions": {
+    "declaration": false,
+    "esModuleInterop": true,
+    "lib": ["esnext"],
+    "module": "commonjs",
+    "moduleResolution": "node",
+    "noEmitOnError": true,
+    "noFallthroughCasesInSwitch": true,
+    "noImplicitReturns": true,
+    "noUnusedLocals": true,
+    "noUnusedParameters": true,
+    "noImplicitThis": false,
+    "types": ["node"],
+    "strict": true,
+    "target": "esnext"
+  }
+}

packages/now-go/util/analyze.go

@@ -0,0 +1,161 @@
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"go/ast"
+	"go/parser"
+	"go/token"
+	"io/ioutil"
+	"log"
+	"os"
+	"path/filepath"
+	"strings"
+)
+
+type analyze struct {
+	PackageName string   `json:"packageName"`
+	FuncName    string   `json:"functionName"`
+	Watch       []string `json:"watch"`
+}
+
+// parse go file
+func parse(fileName string) *ast.File {
+	fset := token.NewFileSet()
+	parsed, err := parser.ParseFile(fset, fileName, nil, parser.ParseComments)
+	if err != nil {
+		log.Fatalf("Could not parse Go file \"%s\"\n", fileName)
+		os.Exit(1)
+	}
+
+	return parsed
+}
+
+// ensure we only working with interest go file(s)
+func visit(files *[]string) filepath.WalkFunc {
+	return func(path string, info os.FileInfo, err error) error {
+		itf, err := filepath.Match("*test.go", path)
+		if err != nil {
+			log.Fatal(err)
+		}
+
+		// we don't need Dirs, or test files
+		// we only want `.go` files
+		if info.IsDir() || itf || filepath.Ext(path) != ".go" {
+			return nil
+		}
+
+		*files = append(*files, path)
+		return nil
+	}
+}
+
+// return unique file
+func unique(files []string) []string {
+	encountered := map[string]bool{}
+	for v := range files {
+		encountered[files[v]] = true
+	}
+
+	result := []string{}
+	for key := range encountered {
+		result = append(result, key)
+	}
+	return result
+}
+
+func main() {
+	if len(os.Args) != 2 {
+		// Args should have the program name on `0`
+		// and the file name on `1`
+		fmt.Println("Wrong number of args; Usage is:\n  ./go-analyze file_name.go")
+		os.Exit(1)
+	}
+	fileName := os.Args[1]
+	rf, err := ioutil.ReadFile(fileName)
+	if err != nil {
+		log.Fatal(err)
+	}
+	se := string(rf)
+
+	var files []string
+	var relatedFiles []string
+
+	// Add entrypoint to watchlist
+	relFileName, err := filepath.Rel(filepath.Dir(fileName), fileName)
+	if err != nil {
+		log.Fatal(err)
+	}
+	relatedFiles = append(relatedFiles, relFileName)
+
+	// looking for all go files that have export func
+	// using in entrypoint
+	err = filepath.Walk(filepath.Dir(fileName), visit(&files))
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	for _, file := range files {
+		absFileName, _ := filepath.Abs(fileName)
+		absFile, _ := filepath.Abs(file)
+		// if it isn't entrypoint
+		if absFileName != absFile {
+			// find all export structs and functions
+			pf := parse(file)
+			var exportedDecl []string
+
+			ast.Inspect(pf, func(n ast.Node) bool {
+				switch t := n.(type) {
+				case *ast.FuncDecl:
+					if t.Name.IsExported() {
+						exportedDecl = append(exportedDecl, t.Name.Name)
+					}
+				// find variable declarations
+				case *ast.TypeSpec:
+					// which are public
+					if t.Name.IsExported() {
+						switch t.Type.(type) {
+						// and are interfaces
+						case *ast.StructType:
+							exportedDecl = append(exportedDecl, t.Name.Name)
+						}
+					}
+				}
+				return true
+			})
+
+			for _, ed := range exportedDecl {
+				if strings.Contains(se, ed) {
+					// find relative path of related file
+					rel, err := filepath.Rel(filepath.Dir(fileName), file)
+					if err != nil {
+						log.Fatal(err)
+					}
+					relatedFiles = append(relatedFiles, rel)
+				}
+			}
+		}
+	}
+
+	parsed := parse(fileName)
+	for _, decl := range parsed.Decls {
+		fn, ok := decl.(*ast.FuncDecl)
+		if !ok {
+			// this declaraction is not a function
+			// so we're not interested
+			continue
+		}
+		if fn.Name.IsExported() == true {
+			// we found the first exported function
+			// we're done!
+			analyzed := analyze{
+				PackageName: parsed.Name.Name,
+				FuncName:    fn.Name.Name,
+				Watch:       unique(relatedFiles),
+			}
+			json, _ := json.Marshal(analyzed)
+			fmt.Print(string(json))
+			os.Exit(0)
+		}
+	}
+}

packages/now-go/util/get-exported-function-name.go

@@ -1,41 +0,0 @@
-package main
-
-import (
-	"fmt"
-	"go/ast"
-	"go/parser"
-	"go/token"
-	"os"
-)
-
-func main() {
-	if len(os.Args) != 2 {
-		// Args should have the program name on `0`
-		// and the file name on `1`
-		fmt.Println("Wrong number of args; Usage is:\n  ./get-exported-function-name file_name.go")
-		os.Exit(1)
-	}
-	fileName := os.Args[1]
-	fset := token.NewFileSet()
-
-	parsed, err := parser.ParseFile(fset, fileName, nil, parser.ParseComments)
-	if err != nil {
-		fmt.Printf("Could not parse Go file \"%s\"\n", fileName)
-		os.Exit(1)
-	}
-
-	for _, decl := range parsed.Decls {
-		fn, ok := decl.(*ast.FuncDecl)
-		if !ok {
-			// this declaraction is not a function
-			// so we're not interested
-			continue
-		}
-		if fn.Name.IsExported() == true {
-			// we found the first exported function
-			// we're done!
-			fmt.Print(fn.Name.Name, ",", parsed.Name.Name)
-			os.Exit(0)
-		}
-	}
-}

packages/now-go/util/install.js

@@ -1,18 +0,0 @@
-const { join } = require('path');
-const { downloadGo } = require('../go-helpers');
-
-async function main() {
-  // First download the `go` binary for this platform/arch.
-  const go = await downloadGo();
-
-  // Build the `get-exported-function-name` helper program.
-  // `go get` is not necessary because the program has no external deps.
-  const src = join(__dirname, 'get-exported-function-name.go');
-  const dest = join(__dirname, '../get-exported-function-name');
-  await go.build({ src, dest });
-}
-
-main().catch((err) => {
-  console.error(err);
-  process.exit(1);
-});

packages/now-html-minifier/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@now/html-minifier",
-  "version": "1.0.8-canary.1",
+  "version": "1.1.0",
   "license": "MIT",
   "repository": {
     "type": "git",

packages/now-lambda/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@now/lambda",
-  "version": "0.4.10-canary.1",
+  "version": "0.5.0",
   "license": "MIT",
   "repository": {
     "type": "git",

packages/now-md/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@now/md",
-  "version": "0.4.10-canary.2",
+  "version": "0.5.0",
   "license": "MIT",
   "repository": {
     "type": "git",

packages/now-mdx-deck/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@now/mdx-deck",
-  "version": "0.4.19-canary.2",
+  "version": "0.5.0",
   "license": "MIT",
   "repository": {
     "type": "git",

packages/now-next/.gitignore

@@ -0,0 +1,2 @@
+/dist
+/src/now__bridge.d.ts

packages/now-next/getBridgeTypes.sh

@@ -0,0 +1,11 @@
+#!/bin/bash
+set -euo pipefail
+
+bridge_entrypoint="$(node -p 'require.resolve("@now/node-bridge")')"
+bridge_defs="$(dirname "$bridge_entrypoint")/bridge.d.ts"
+
+if [ ! -e "$bridge_defs" ]; then
+  yarn install --cwd "$bridge_entrypoint"
+fi
+
+cp -v "$bridge_defs" src/now__bridge.d.ts

packages/now-next/package.json

@@ -1,9 +1,12 @@
 {
   "name": "@now/next",
-  "version": "0.1.3-canary.15",
+  "version": "0.2.0",
   "license": "MIT",
+  "main": "./dist/index",
   "scripts": {
-    "build": "tsc"
+    "build": "./getBridgeTypes.sh && tsc",
+    "test": "npm run build && jest",
+    "prepublish": "yarn run build"
   },
   "repository": {
     "type": "git",
@@ -11,10 +14,20 @@
     "directory": "packages/now-next"
   },
   "dependencies": {
-    "@now/node-bridge": "^1.0.2-canary.2",
-    "execa": "^1.0.0",
+    "@now/node-bridge": "^1.1.0",
     "fs-extra": "^7.0.0",
-    "resolve-from": "^4.0.0",
+    "get-port": "^5.0.0",
+    "resolve-from": "^5.0.0",
     "semver": "^5.6.0"
+  },
+  "files": [
+    "dist"
+  ],
+  "devDependencies": {
+    "@types/next-server": "^8.0.0",
+    "@types/resolve-from": "^5.0.1",
+    "@types/semver": "^6.0.0",
+    "jest": "^24.7.1",
+    "typescript": "^3.4.3"
   }
 }

packages/now-next/src/dev-server.ts

@@ -0,0 +1,41 @@
+import resolveFrom from 'resolve-from';
+import { parse } from 'url';
+import getPort from 'get-port';
+import { createServer } from 'http';
+
+export interface ProcessEnv {
+  [key: string]: string;
+}
+
+async function main(env: ProcessEnv, cwd: string) {
+  const next = require(resolveFrom(cwd, 'next'));
+  const app = next({ dev: true, dir: cwd });
+  const handler = app.getRequestHandler();
+
+  const openPort = await getPort({
+    port: [ 5000, 4000 ]
+  });
+
+  const url = `http://localhost:${openPort}`;
+
+  // Prepare for incoming requests
+  await app.prepare();
+
+  createServer((req, res) => {
+    const parsedUrl = parse(req.url || '', true);
+    handler(req, res, parsedUrl);
+  }).listen(openPort, (error: NodeJS.ErrnoException) => {
+    if (error) {
+      console.error(error);
+      process.exit(1);
+
+      return;
+    }
+
+    if (process.send) {
+      process.send(url);
+    }
+  });
+}
+
+main(process.env as ProcessEnv, process.cwd());

packages/now-next/src/index.ts

@@ -1,55 +1,58 @@
-const { createLambda } = require('@now/build-utils/lambda'); // eslint-disable-line import/no-extraneous-dependencies
-const download = require('@now/build-utils/fs/download'); // eslint-disable-line import/no-extraneous-dependencies
-const FileFsRef = require('@now/build-utils/file-fs-ref'); // eslint-disable-line import/no-extraneous-dependencies
-const FileBlob = require('@now/build-utils/file-blob'); // eslint-disable-line import/no-extraneous-dependencies
-const resolveFrom = require('resolve-from');
-const path = require('path');
-const url = require('url');
-const {
+import { ChildProcess, fork, SpawnOptions } from 'child_process';
+import {
+  pathExists,
+  readFile,
+  unlink as unlinkFile,
+  writeFile,
+} from 'fs-extra';
+import os from 'os';
+import path from 'path';
+import semver from 'semver';
+
+import {
+  BuildOptions,
+  createLambda,
+  download,
+  FileBlob,
+  FileFsRef,
+  Files,
+  glob,
+  Lambda,
+  PrepareCacheOptions,
   runNpmInstall,
   runPackageJsonScript,
-} = require('@now/build-utils/fs/run-user-scripts'); // eslint-disable-line import/no-extraneous-dependencies
-const glob = require('@now/build-utils/fs/glob'); // eslint-disable-line import/no-extraneous-dependencies
-const {
-  readFile,
-  writeFile,
-  unlink: unlinkFile,
-  remove: removePath,
-  pathExists,
-} = require('fs-extra');
-const semver = require('semver');
-const nextLegacyVersions = require('./legacy-versions');
-const {
+} from '@now/build-utils';
+
+import nextLegacyVersions from './legacy-versions';
+import {
   excludeFiles,
-  validateEntrypoint,
+  getNextConfig,
+  getPathsInside,
+  getRoutes,
   includeOnlyEntryDirectory,
   normalizePackageJson,
   onlyStaticDirectory,
-  getNextConfig,
-} = require('./utils');
+  stringMap,
+  validateEntrypoint,
+} from './utils';
 
-/** @typedef { import('@now/build-utils/file-ref').Files } Files */
-/** @typedef { import('@now/build-utils/fs/download').DownloadedFiles } DownloadedFiles */
+interface BuildParamsMeta {
+  isDev: boolean | undefined;
+}
 
-/**
- * @typedef {Object} BuildParamsMeta
- * @property {boolean} [isDev] - Files object
- * @property {?string} [requestPath] - Entrypoint specified for the builder
- */
+interface BuildParamsType extends BuildOptions {
+  files: Files;
+  entrypoint: string;
+  workPath: string;
+  meta: BuildParamsMeta;
+}
 
-/**
- * @typedef {Object} BuildParamsType
- * @property {Files} files - Files object
- * @property {string} entrypoint - Entrypoint specified for the builder
- * @property {string} workPath - Working directory for this build
- * @property {BuildParamsMeta} [meta] - Various meta settings
- */
+export const version = 2;
 
 /**
  * Read package.json from files
- * @param {string} entryPath
  */
-async function readPackageJson(entryPath) {
+async function readPackageJson(entryPath: string) {
   const packagePath = path.join(entryPath, 'package.json');
 
   try {
@@ -62,29 +65,28 @@ async function readPackageJson(entryPath) {
 
 /**
  * Write package.json
- * @param {string} workPath
- * @param {Object} packageJson
  */
-async function writePackageJson(workPath, packageJson) {
+async function writePackageJson(workPath: string, packageJson: Object) {
   await writeFile(
     path.join(workPath, 'package.json'),
-    JSON.stringify(packageJson, null, 2),
+    JSON.stringify(packageJson, null, 2)
   );
 }
 
 /**
  * Write .npmrc with npm auth token
- * @param {string} workPath
- * @param {string} token
  */
-async function writeNpmRc(workPath, token) {
+async function writeNpmRc(workPath: string, token: string) {
   await writeFile(
     path.join(workPath, '.npmrc'),
-    `//registry.npmjs.org/:_authToken=${token}`,
+    `//registry.npmjs.org/:_authToken=${token}`
   );
 }
 
-function getNextVersion(packageJson) {
+function getNextVersion(packageJson: {
+  dependencies?: { [key: string]: string };
+  devDependencies?: { [key: string]: string };
+}) {
   let nextVersion;
   if (packageJson.dependencies && packageJson.dependencies.next) {
     nextVersion = packageJson.dependencies.next;
@@ -94,7 +96,7 @@ function getNextVersion(packageJson) {
   return nextVersion;
 }
 
-function isLegacyNext(nextVersion) {
+function isLegacyNext(nextVersion: string) {
   // If version is using the dist-tag instead of a version range
   if (nextVersion === 'canary' || nextVersion === 'latest') {
     return false;
@@ -114,73 +116,95 @@ function isLegacyNext(nextVersion) {
   return true;
 }
 
-function setNextExperimentalPage(files, entry, meta) {
-  if (meta.requestPath) {
-    if (meta.requestPath.startsWith(path.join(entry, 'static'))) {
-      return onlyStaticDirectory(
-        includeOnlyEntryDirectory(files, entry),
-        entry,
-      );
-    }
+const name = '[@now/next]';
+const urls: stringMap = {};
 
-    const { pathname } = url.parse(meta.requestPath);
-    const assetPath = pathname.match(
-      /^\/?_next\/static\/[^/]+\/pages\/(.+)\.js$/,
+function startDevServer(entryPath: string) {
+  const forked = fork(path.join(__dirname, 'dev-server.js'), [], {
+    cwd: entryPath,
+    execArgv: [],
+    env: {
+      NOW_REGION: 'dev1',
+    },
+  });
+
+  const getUrl = () =>
+    new Promise<string>((resolve, reject) => {
+      forked.on('message', resolve);
+      forked.on('error', reject);
+    });
+
+  return { forked, getUrl };
+}
+
+export const config = {
+  maxLambdaSize: '5mb',
+};
+
+export const build = async ({
+  files,
+  workPath,
+  entrypoint,
+  meta = {} as BuildParamsMeta,
+}: BuildParamsType): Promise<{
+  routes?: any[];
+  output: Files;
+  watch?: string[];
+  childProcesses: ChildProcess[];
+}> => {
+  validateEntrypoint(entrypoint);
+
+  const routes: any[] = [];
+  const entryDirectory = path.dirname(entrypoint);
+  const entryPath = path.join(workPath, entryDirectory);
+  const dotNext = path.join(entryPath, '.next');
+
+  console.log(`${name} Downloading user files...`);
+  await download(files, workPath, meta);
+
+  const pkg = await readPackageJson(entryPath);
+  const nextVersion = getNextVersion(pkg);
+
+  if (!nextVersion) {
+    throw new Error(
+      'No Next.js version could be detected in "package.json". Make sure `"next"` is installed in "dependencies" or "devDependencies"'
     );
-    // eslint-disable-next-line no-underscore-dangle
-    process.env.__NEXT_BUILDER_EXPERIMENTAL_PAGE = assetPath
-      ? assetPath[1]
-      : pathname;
   }
 
+  process.env.__NEXT_BUILDER_EXPERIMENTAL_TARGET = 'serverless';
+
   if (meta.isDev) {
     // eslint-disable-next-line no-underscore-dangle
     process.env.__NEXT_BUILDER_EXPERIMENTAL_DEBUG = 'true';
-  }
+    let childProcess: ChildProcess | undefined;
 
-  return null;
-}
-
-exports.config = {
-  maxLambdaSize: '5mb',
-};
-
-/**
- * @param {BuildParamsType} buildParams
- * @returns {Promise<Files>}
- */
-exports.build = async ({
-  files, workPath, entrypoint, meta = {},
-}) => {
-  validateEntrypoint(entrypoint);
-
-  const entryDirectory = path.dirname(entrypoint);
-  const maybeStaticFiles = setNextExperimentalPage(files, entryDirectory, meta);
-  if (maybeStaticFiles) return maybeStaticFiles; // return early if requestPath is static file
-
-  console.log('downloading user files...');
-  await download(files, workPath);
-  const entryPath = path.join(workPath, entryDirectory);
-  const dotNext = path.join(entryPath, '.next');
-
-  if (await pathExists(dotNext)) {
-    if (meta.isDev) {
-      await removePath(dotNext).catch((e) => {
-        if (e.code !== 'ENOENT') throw e;
-      });
-    } else {
-      console.warn(
-        'WARNING: You should probably not upload the `.next` directory. See https://zeit.co/docs/v2/deployments/official-builders/next-js-now-next/ for more information.',
+    // If this is the initial build, we want to start the server
+    if (!urls[entrypoint]) {
+      console.log(`${name} Installing dependencies...`);
+      await runNpmInstall(entryPath, ['--prefer-offline']);
+      const { forked, getUrl } = startDevServer(entryPath);
+      urls[entrypoint] = await getUrl();
+      childProcess = forked;
+      console.log(
+        `${name} Development server for ${entrypoint} running at ${
+          urls[entrypoint]
+        }`
       );
     }
+
+    const pathsInside = getPathsInside(entryDirectory, files);
+
+    return {
+      output: {},
+      routes: getRoutes(entryDirectory, pathsInside, files, urls[entrypoint]),
+      watch: pathsInside,
+      childProcesses: childProcess ? [childProcess] : [],
+    };
   }
 
-  const pkg = await readPackageJson(entryPath);
-
-  let nextVersion = getNextVersion(pkg);
-  if (!nextVersion) {
-    throw new Error(
-      'No Next.js version could be detected in "package.json". Make sure `"next"` is installed in "dependencies" or "devDependencies"',
+  if (await pathExists(dotNext)) {
+    console.warn(
+      'WARNING: You should not upload the `.next` directory. See https://zeit.co/docs/v2/deployments/official-builders/next-js-now-next/ for more details.'
     );
   }
 
@@ -202,7 +226,7 @@ exports.build = async ({
     }
 
     console.warn(
-      "WARNING: your application is being deployed in @now/next's legacy mode. http://err.sh/zeit/now-builders/now-next-legacy-mode",
+      "WARNING: your application is being deployed in @now/next's legacy mode. http://err.sh/zeit/now-builders/now-next-legacy-mode"
     );
 
     console.log('normalizing package.json');
@@ -211,7 +235,7 @@ exports.build = async ({
     await writePackageJson(entryPath, packageJson);
   } else if (!pkg.scripts || !pkg.scripts['now-build']) {
     console.warn(
-      'WARNING: "now-build" script not found. Adding \'"now-build": "next build"\' to "package.json" automatically',
+      'WARNING: "now-build" script not found. Adding \'"now-build": "next build"\' to "package.json" automatically'
     );
     pkg.scripts = {
       'now-build': 'next build',
@@ -229,30 +253,14 @@ exports.build = async ({
   console.log('installing dependencies...');
   await runNpmInstall(entryPath, ['--prefer-offline']);
 
-  nextVersion = JSON.parse(
-    await readFile(resolveFrom(entryPath, 'next/package.json'), 'utf8'),
-  ).version;
-
-  const isUpdated = (v) => {
-    if (v === 'canary') return true;
-
-    try {
-      return semver.satisfies(v, '>=8.0.5-canary.14', {
-        includePrerelease: true,
-      });
-    } catch (e) {
-      return false;
-    }
-  };
-
-  if ((meta.isDev || meta.requestPath) && !isUpdated(nextVersion)) {
-    throw new Error(
-      '`now dev` can only be used with Next.js >=8.0.5-canary.14!',
-    );
-  }
-
   console.log('running user script...');
-  await runPackageJsonScript(entryPath, 'now-build');
+  const memoryToConsume = Math.floor(os.totalmem() / 1024 ** 2) - 128;
+  await runPackageJsonScript(entryPath, 'now-build', {
+    env: {
+      ...process.env,
+      NODE_OPTIONS: `--max_old_space_size=${memoryToConsume}`,
+    },
+  } as SpawnOptions);
 
   if (isLegacy) {
     console.log('running npm install --production...');
@@ -263,21 +271,21 @@ exports.build = async ({
     await unlinkFile(path.join(entryPath, '.npmrc'));
   }
 
-  const lambdas = {};
+  const lambdas: { [key: string]: Lambda } = {};
 
   if (isLegacy) {
     const filesAfterBuild = await glob('**', entryPath);
 
     console.log('preparing lambda files...');
-    let buildId;
+    let buildId: string;
     try {
       buildId = await readFile(
         path.join(entryPath, '.next', 'BUILD_ID'),
-        'utf8',
+        'utf8'
       );
     } catch (err) {
       console.error(
-        'BUILD_ID not found in ".next". The "package.json" "build" script did not run "next build"',
+        'BUILD_ID not found in ".next". The "package.json" "build" script did not run "next build"'
       );
       throw new Error('Missing BUILD_ID');
     }
@@ -285,12 +293,12 @@ exports.build = async ({
     const dotNextServerRootFiles = await glob('.next/server/*', entryPath);
     const nodeModules = excludeFiles(
       await glob('node_modules/**', entryPath),
-      file => file.startsWith('node_modules/.cache'),
+      file => file.startsWith('node_modules/.cache')
     );
     const launcherFiles = {
       'now__bridge.js': new FileFsRef({ fsPath: require('@now/node-bridge') }),
     };
-    const nextFiles = {
+    const nextFiles: { [key: string]: FileFsRef } = {
       ...nodeModules,
       ...dotNextRootFiles,
       ...dotNextServerRootFiles,
@@ -301,13 +309,13 @@ exports.build = async ({
     }
     const pages = await glob(
       '**/*.js',
-      path.join(entryPath, '.next', 'server', 'static', buildId, 'pages'),
+      path.join(entryPath, '.next', 'server', 'static', buildId, 'pages')
     );
     const launcherPath = path.join(__dirname, 'legacy-launcher.js');
     const launcherData = await readFile(launcherPath, 'utf8');
 
     await Promise.all(
-      Object.keys(pages).map(async (page) => {
+      Object.keys(pages).map(async page => {
         // These default pages don't have to be handled as they'd always 404
         if (['_app.js', '_error.js', '_document.js'].includes(page)) {
           return;
@@ -316,7 +324,7 @@ exports.build = async ({
         const pathname = page.replace(/\.js$/, '');
         const launcher = launcherData.replace(
           'PATHNAME_PLACEHOLDER',
-          `/${pathname.replace(/(^|\/)index$/, '')}`,
+          `/${pathname.replace(/(^|\/)index$/, '')}`
         );
 
         const pageFiles = {
@@ -345,7 +353,7 @@ exports.build = async ({
           runtime: 'nodejs8.10',
         });
         console.log(`Created lambda for page: "${page}"`);
-      }),
+      })
     );
   } else {
     console.log('preparing lambda files...');
@@ -357,7 +365,7 @@ exports.build = async ({
     };
     const pages = await glob(
       '**/*.js',
-      path.join(entryPath, '.next', 'serverless', 'pages'),
+      path.join(entryPath, '.next', 'serverless', 'pages')
     );
 
     const pageKeys = Object.keys(pages);
@@ -372,14 +380,14 @@ exports.build = async ({
       }
 
       throw new Error(
-        'No serverless pages were built. https://err.sh/zeit/now-builders/now-next-no-serverless-pages-built',
+        'No serverless pages were built. https://err.sh/zeit/now-builders/now-next-no-serverless-pages-built'
       );
     }
 
     // An optional assets folder that is placed alongside every page entrypoint
     const assets = await glob(
       'assets/**',
-      path.join(entryPath, '.next', 'serverless'),
+      path.join(entryPath, '.next', 'serverless')
     );
 
     const assetKeys = Object.keys(assets);
@@ -389,7 +397,7 @@ exports.build = async ({
     }
 
     await Promise.all(
-      pageKeys.map(async (page) => {
+      pageKeys.map(async page => {
         // These default pages don't have to be handled as they'd always 404
         if (['_app.js', '_error.js', '_document.js'].includes(page)) {
           return;
@@ -408,37 +416,48 @@ exports.build = async ({
           runtime: 'nodejs8.10',
         });
         console.log(`Created lambda for page: "${page}"`);
-      }),
+      })
     );
   }
 
   const nextStaticFiles = await glob(
     '**',
-    path.join(entryPath, '.next', 'static'),
+    path.join(entryPath, '.next', 'static')
   );
   const staticFiles = Object.keys(nextStaticFiles).reduce(
     (mappedFiles, file) => ({
       ...mappedFiles,
-      [path.join(entryDirectory, `_next/static/${file}`)]: nextStaticFiles[file],
+      [path.join(entryDirectory, `_next/static/${file}`)]: nextStaticFiles[
+        file
+      ],
     }),
-    {},
+    {}
   );
 
   const staticDirectoryFiles = onlyStaticDirectory(
     includeOnlyEntryDirectory(files, entryDirectory),
-    entryDirectory,
+    entryDirectory
   );
 
-  return { ...lambdas, ...staticFiles, ...staticDirectoryFiles };
+  return {
+    output: { ...lambdas, ...staticFiles, ...staticDirectoryFiles },
+    routes: [],
+    watch: [],
+    childProcesses: [],
+  };
 };
 
-exports.prepareCache = async ({ workPath, entrypoint }) => {
+export const prepareCache = async ({
+  workPath,
+  entrypoint,
+}: PrepareCacheOptions) => {
   console.log('preparing cache ...');
   const entryDirectory = path.dirname(entrypoint);
   const entryPath = path.join(workPath, entryDirectory);
 
   const pkg = await readPackageJson(entryPath);
   const nextVersion = getNextVersion(pkg);
+  if (!nextVersion) throw new Error('Could not parse Next.js version');
   const isLegacy = isLegacyNext(nextVersion);
 
   if (isLegacy) {
@@ -457,22 +476,3 @@ exports.prepareCache = async ({ workPath, entrypoint }) => {
   console.log('cache file manifest produced');
   return cache;
 };
-
-exports.subscribe = async ({ entrypoint, files }) => {
-  const entryDirectory = path.dirname(entrypoint);
-  const pageFiles = includeOnlyEntryDirectory(
-    files,
-    path.join(entryDirectory, 'pages'),
-  );
-
-  return [
-    path.join(entryDirectory, '_next/static/unoptimized-build/pages/**'),
-    path.join(entryDirectory, 'static/**'),
-    // List all pages without their extensions
-    ...Object.keys(pageFiles).map(page => page
-      .replace(/^pages\//i, '')
-      .split('.')
-      .slice(0, -1)
-      .join('.')),
-  ];
-};

packages/now-next/src/legacy-launcher.ts

@@ -1,7 +1,7 @@
-const { Server } = require('http');
-const next = require('next-server');
-const url = require('url');
-const { Bridge } = require('./now__bridge');
+import { Server } from 'http';
+import next from 'next-server';
+import url from 'url';
+import { Bridge } from './now__bridge';
 
 if (!process.env.NODE_ENV) {
   process.env.NODE_ENV = process.env.NOW_REGION === 'dev1' ? 'development' : 'production';
@@ -10,7 +10,7 @@ if (!process.env.NODE_ENV) {
 const app = next({});
 
 const server = new Server((req, res) => {
-  const parsedUrl = url.parse(req.url, true);
+  const parsedUrl = url.parse(req.url || '', true);
   app.render(req, res, 'PATHNAME_PLACEHOLDER', parsedUrl.query, parsedUrl);
 });
 

packages/now-next/src/legacy-versions.ts

@@ -1,4 +1,4 @@
-module.exports = [
+export default [
   '0.1.0',
   '0.1.1',
   '0.2.0',

packages/now-next/src/utils.ts

@@ -1,16 +1,13 @@
-const fs = require('fs-extra');
-const path = require('path');
+import fs from 'fs-extra';
+import path from 'path';
+import { Files } from '@now/build-utils';
 
-/** @typedef { import('@now/build-utils/file-ref') } FileRef */
-/** @typedef { import('@now/build-utils/file-fs-ref') } FileFsRef */
-/** @typedef {{[filePath: string]: FileRef|FileFsRef}} Files */
+type stringMap = {[key: string]: string};
 
 /**
  * Validate if the entrypoint is allowed to be used
- * @param {string} entrypoint
- * @throws {Error}
  */
-function validateEntrypoint(entrypoint) {
+function validateEntrypoint(entrypoint: string) {
   if (
     !/package\.json$/.exec(entrypoint)
     && !/next\.config\.js$/.exec(entrypoint)
@@ -21,21 +18,10 @@ function validateEntrypoint(entrypoint) {
   }
 }
 
-/**
- * This callback type is called `requestCallback` and is displayed as a global symbol.
- *
- * @callback matcher
- * @param {string} filePath
- * @returns {boolean}
- */
-
 /**
  * Exclude certain files from the files object
- * @param {Files} files
- * @param {matcher} matcher
- * @returns {Files}
  */
-function excludeFiles(files, matcher) {
+function excludeFiles(files: Files, matcher: (filePath: string) => boolean): Files {
   return Object.keys(files).reduce((newFiles, filePath) => {
     if (matcher(filePath)) {
       return newFiles;
@@ -49,16 +35,13 @@ function excludeFiles(files, matcher) {
 
 /**
  * Creates a new Files object holding only the entrypoint files
- * @param {Files} files
- * @param {string} entryDirectory
- * @returns {Files}
  */
-function includeOnlyEntryDirectory(files, entryDirectory) {
+function includeOnlyEntryDirectory(files: Files, entryDirectory: string): Files {
   if (entryDirectory === '.') {
     return files;
   }
 
-  function matcher(filePath) {
+  function matcher(filePath: string) {
     return !filePath.startsWith(entryDirectory);
   }
 
@@ -67,10 +50,8 @@ function includeOnlyEntryDirectory(files, entryDirectory) {
 
 /**
  * Exclude package manager lockfiles from files
- * @param {Files} files
- * @returns {Files}
  */
-function excludeLockFiles(files) {
+function excludeLockFiles(files: Files): Files {
   const newFiles = files;
   if (newFiles['package-lock.json']) {
     delete newFiles['package-lock.json'];
@@ -83,11 +64,9 @@ function excludeLockFiles(files) {
 
 /**
  * Include the static directory from files
- * @param {Files} files
- * @returns {Files}
  */
-function onlyStaticDirectory(files, entryDir) {
-  function matcher(filePath) {
+function onlyStaticDirectory(files: Files, entryDir: string): Files {
+  function matcher(filePath: string) {
     return !filePath.startsWith(path.join(entryDir, 'static'));
   }
 
@@ -96,11 +75,10 @@ function onlyStaticDirectory(files, entryDir) {
 
 /**
  * Enforce specific package.json configuration for smallest possible lambda
- * @param {{dependencies?: any, devDependencies?: any, scripts?: any}} defaultPackageJson
  */
-function normalizePackageJson(defaultPackageJson = {}) {
-  const dependencies = {};
-  const devDependencies = {
+function normalizePackageJson(defaultPackageJson: {dependencies?: stringMap, devDependencies?: stringMap, scripts?: stringMap} = {}) {
+  const dependencies: stringMap = {};
+  const devDependencies: stringMap = {
     ...defaultPackageJson.dependencies,
     ...defaultPackageJson.devDependencies,
   };
@@ -139,7 +117,7 @@ function normalizePackageJson(defaultPackageJson = {}) {
   };
 }
 
-async function getNextConfig(workPath, entryPath) {
+async function getNextConfig(workPath: string, entryPath: string) {
   const entryConfig = path.join(entryPath, './next.config.js');
   if (await fs.pathExists(entryConfig)) {
     return fs.readFile(entryConfig, 'utf8');
@@ -153,7 +131,84 @@ async function getNextConfig(workPath, entryPath) {
   return null;
 }
 
-module.exports = {
+function pathIsInside(firstPath: string, secondPath: string) {
+  return !path.relative(firstPath, secondPath).startsWith('..');
+}
+
+function getPathsInside(entryDirectory: string, files: Files) {
+  const watch: string[] = [];
+
+  for (const file of Object.keys(files)) {
+    // If the file is outside of the entrypoint directory, we do
+    // not want to monitor it for changes.
+    if (!pathIsInside(entryDirectory, file)) {
+      continue;
+    }
+
+    watch.push(file);
+  }
+
+  return watch;
+}
+
+function getRoutes(entryDirectory: string, pathsInside: string[], files: Files, url: string): any[] {
+  const filesInside: Files = {};
+  const prefix = entryDirectory === `.` ? `/` : `/${entryDirectory}/`;
+
+  for (const file of Object.keys(files)) {
+    if (!pathsInside.includes(file)) {
+      continue;
+    }
+
+    filesInside[file] = files[file];
+  }
+
+  const routes: any[] = [
+    {
+      src: `${prefix}_next/(.*)`,
+      dest: `${url}/_next/$1`
+    },
+    {
+      src: `${prefix}static/(.*)`,
+      dest: `${url}/static/$1`
+    }
+  ];
+
+  for (const file of Object.keys(filesInside)) {
+    const relativePath = path.relative(entryDirectory, file);
+    const isPage = pathIsInside('pages', relativePath);
+
+    if (!isPage) {
+      continue;
+    }
+
+    const relativeToPages = path.relative('pages', relativePath);
+    const extension = path.extname(relativeToPages);
+    const pageName = relativeToPages.replace(extension, '');
+
+    if (pageName.startsWith('_')) {
+      continue;
+    }
+
+    routes.push({
+      src: `${prefix}${pageName}`,
+      dest: `${url}/${pageName}`
+    });
+
+    if (pageName.endsWith('index')) {
+      const resolvedIndex = pageName.replace('/index', '').replace('index', '');
+
+      routes.push({
+        src: `${prefix}${resolvedIndex}`,
+        dest: `${url}/${resolvedIndex}`
+      });
+    }
+  }
+
+  return routes;
+}
+
+export {
   excludeFiles,
   validateEntrypoint,
   includeOnlyEntryDirectory,
@@ -161,4 +216,7 @@ module.exports = {
   normalizePackageJson,
   onlyStaticDirectory,
   getNextConfig,
+  getPathsInside,
+  getRoutes,
+  stringMap,
 };

packages/now-next/test/integration/index.test.js

@@ -1,17 +1,17 @@
 /* global it, expect */
 const path = require('path');
-const runBuildLambda = require('../../lib/run-build-lambda');
+const runBuildLambda = require('../../../../test/lib/run-build-lambda');
 
 const FOUR_MINUTES = 240000;
 
 it(
   'Should build the standard example',
   async () => {
-    const { buildResult } = await runBuildLambda(
-      path.join(__dirname, 'standard'),
-    );
-    expect(buildResult.index).toBeDefined();
-    const filePaths = Object.keys(buildResult);
+    const {
+      buildResult: { output },
+    } = await runBuildLambda(path.join(__dirname, 'standard'));
+    expect(output.index).toBeDefined();
+    const filePaths = Object.keys(output);
     const hasUnderScoreAppStaticFile = filePaths.some(filePath => filePath.match(/static.*\/pages\/_app\.js$/));
     const hasUnderScoreErrorStaticFile = filePaths.some(filePath => filePath.match(/static.*\/pages\/_error\.js$/));
     expect(hasUnderScoreAppStaticFile).toBeTruthy();
@@ -23,12 +23,12 @@ it(
 it(
   'Should build the monorepo example',
   async () => {
-    const { buildResult } = await runBuildLambda(
-      path.join(__dirname, 'monorepo'),
-    );
-    expect(buildResult['www/index']).toBeDefined();
-    expect(buildResult['www/static/test.txt']).toBeDefined();
-    const filePaths = Object.keys(buildResult);
+    const {
+      buildResult: { output },
+    } = await runBuildLambda(path.join(__dirname, 'monorepo'));
+    expect(output['www/index']).toBeDefined();
+    expect(output['www/static/test.txt']).toBeDefined();
+    const filePaths = Object.keys(output);
     const hasUnderScoreAppStaticFile = filePaths.some(filePath => filePath.match(/static.*\/pages\/_app\.js$/));
     const hasUnderScoreErrorStaticFile = filePaths.some(filePath => filePath.match(/static.*\/pages\/_error\.js$/));
     expect(hasUnderScoreAppStaticFile).toBeTruthy();
@@ -40,11 +40,11 @@ it(
 it(
   'Should build the legacy standard example',
   async () => {
-    const { buildResult } = await runBuildLambda(
-      path.join(__dirname, 'legacy-standard'),
-    );
-    expect(buildResult.index).toBeDefined();
-    const filePaths = Object.keys(buildResult);
+    const {
+      buildResult: { output },
+    } = await runBuildLambda(path.join(__dirname, 'legacy-standard'));
+    expect(output.index).toBeDefined();
+    const filePaths = Object.keys(output);
     const hasUnderScoreAppStaticFile = filePaths.some(filePath => filePath.match(/static.*\/pages\/_app\.js$/));
     const hasUnderScoreErrorStaticFile = filePaths.some(filePath => filePath.match(/static.*\/pages\/_error\.js$/));
     expect(hasUnderScoreAppStaticFile).toBeTruthy();
@@ -56,10 +56,10 @@ it(
 it(
   'Should build the legacy custom dependency test',
   async () => {
-    const { buildResult } = await runBuildLambda(
-      path.join(__dirname, 'legacy-custom-dependency'),
-    );
-    expect(buildResult.index).toBeDefined();
+    const {
+      buildResult: { output },
+    } = await runBuildLambda(path.join(__dirname, 'legacy-custom-dependency'));
+    expect(output.index).toBeDefined();
   },
   FOUR_MINUTES,
 );
@@ -78,10 +78,10 @@ it('Should throw when package.json or next.config.js is not the "src"', async ()
 it(
   'Should build the static-files test on legacy',
   async () => {
-    const { buildResult } = await runBuildLambda(
-      path.join(__dirname, 'legacy-static-files'),
-    );
-    expect(buildResult['static/test.txt']).toBeDefined();
+    const {
+      buildResult: { output },
+    } = await runBuildLambda(path.join(__dirname, 'legacy-static-files'));
+    expect(output['static/test.txt']).toBeDefined();
   },
   FOUR_MINUTES,
 );
@@ -89,10 +89,10 @@ it(
 it(
   'Should build the static-files test',
   async () => {
-    const { buildResult } = await runBuildLambda(
-      path.join(__dirname, 'static-files'),
-    );
-    expect(buildResult['static/test.txt']).toBeDefined();
+    const {
+      buildResult: { output },
+    } = await runBuildLambda(path.join(__dirname, 'static-files'));
+    expect(output['static/test.txt']).toBeDefined();
   },
   FOUR_MINUTES,
 );

packages/now-next/test/unit/build.test.js

@@ -0,0 +1,90 @@
+/* global expect, it, jest */
+const path = require('path');
+const os = require('os');
+const { build } = require('@now/next');
+const { FileBlob } = require('@now/build-utils');
+
+jest.setTimeout(45000);
+
+describe('build meta dev', () => {
+  const files = {
+    'next.config.js': new FileBlob({
+      mode: 0o777,
+      data: `
+      module.exports = {
+        target: 'serverless'
+      }
+    `,
+    }),
+    'pages/index.js': new FileBlob({
+      mode: 0o777,
+      data: `
+      export default () => 'Index page'
+    `,
+    }),
+    'package.json': new FileBlob({
+      mode: 0o777,
+      data: `
+      {
+        "scripts": {
+          "now-build": "next build"
+        },
+        "dependencies": {
+          "next": "8",
+          "react": "16",
+          "react-dom": "16"
+        }
+      }
+    `,
+    }),
+  };
+  const entrypoint = 'next.config.js';
+  const workPath = path.join(
+    os.tmpdir(),
+    Math.random()
+      .toString()
+      .slice(3),
+  );
+  console.log('workPath directory: ', workPath);
+  /*
+  it('should have builder v2 response isDev=false', async () => {
+    const meta = { isDev: false, requestPath: null };
+    const { output, routes, watch } = await build({
+      files,
+      workPath,
+      entrypoint,
+      meta,
+    });
+    //console.log('output: ', Object.keys(output));
+    expect(Object.keys(output).length).toBe(7);
+    expect(output.index.type).toBe('Lambda');
+    expect(routes.length).toBe(0);
+    expect(watch.length).toBe(0);
+  });
+  */
+
+  it('should have builder v2 response isDev=true', async () => {
+    const meta = { isDev: true, requestPath: null };
+    const {
+      output, routes, watch, childProcesses,
+    } = await build({
+      files,
+      workPath,
+      entrypoint,
+      meta,
+    });
+    routes.forEach((route) => {
+      // eslint-disable-next-line no-param-reassign
+      route.dest = route.dest.replace(':4000', ':5000');
+    });
+    expect(output).toEqual({});
+    expect(routes).toEqual([
+      { src: '/_next/(.*)', dest: 'http://localhost:5000/_next/$1' },
+      { src: '/static/(.*)', dest: 'http://localhost:5000/static/$1' },
+      { src: '/index', dest: 'http://localhost:5000/index' },
+      { src: '/', dest: 'http://localhost:5000/' },
+    ]);
+    expect(watch).toEqual(['next.config.js', 'pages/index.js', 'package.json']);
+    childProcesses.forEach(cp => cp.kill());
+  });
+});

packages/now-next/test/unit/utils.test.js

@@ -5,7 +5,7 @@ const {
   includeOnlyEntryDirectory,
   normalizePackageJson,
   getNextConfig,
-} = require('@now/next/utils');
+} = require('@now/next/dist/utils');
 const FileRef = require('@now/build-utils/file-ref'); // eslint-disable-line import/no-extraneous-dependencies
 
 describe('getNextConfig', () => {

packages/now-next/tsconfig.json

@@ -1,20 +1,18 @@
 {
   "compilerOptions": {
-    "target": "ES2017",
+    "strict": true,
+    "esModuleInterop": true,
+    "lib": ["esnext"],
+    "target": "esnext",
     "module": "commonjs",
-    "lib": ["es2017"],
-    "allowJs": true,
-    "checkJs": true,
-    "noEmit": true,
-    "strict": false,
-    "types": ["node"],
-    "esModuleInterop": true
+    "outDir": "dist",
+    "sourceMap": false,
+    "declaration": false
   },
   "include": [
-    "./"
+    "src/**/*"
   ],
   "exclude": [
-    "./launcher.js",
-    "./legacy-launcher.js"
+    "node_modules"
   ]
 }

packages/now-node-bridge/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@now/node-bridge",
-  "version": "1.0.2-canary.2",
+  "version": "1.1.0",
   "license": "MIT",
   "main": "./index.js",
   "repository": {

packages/now-node-server/index.js

@@ -43,7 +43,10 @@ async function compile(workPath, downloadedFiles, entrypoint, config) {
   const input = downloadedFiles[entrypoint].fsPath;
   const inputDir = path.dirname(input);
   const ncc = require('@zeit/ncc');
-  const { code, assets } = await ncc(input, { sourceMap: true });
+  const { code, map, assets } = await ncc(input, {
+    sourceMap: true,
+    sourceMapRegister: true,
+  });
 
   if (config && config.includeFiles) {
     // eslint-disable-next-line no-restricted-syntax
@@ -67,16 +70,16 @@ async function compile(workPath, downloadedFiles, entrypoint, config) {
   }
 
   const preparedFiles = {};
-  const blob = new FileBlob({ data: code });
   // move all user code to 'user' subdirectory
-  preparedFiles[entrypoint] = blob;
+  preparedFiles[entrypoint] = new FileBlob({ data: code });
+  preparedFiles[`${entrypoint.replace('.ts', '.js')}.map`] = new FileBlob({
+    data: map,
+  });
   // eslint-disable-next-line no-restricted-syntax
   for (const assetName of Object.keys(assets)) {
     const { source: data, permissions: mode } = assets[assetName];
     const blob2 = new FileBlob({ data, mode });
-    preparedFiles[
-      path.join(path.dirname(entrypoint), assetName)
-    ] = blob2;
+    preparedFiles[path.join(path.dirname(entrypoint), assetName)] = blob2;
   }
 
   return preparedFiles;
@@ -93,10 +96,7 @@ exports.config = {
 exports.build = async ({
   files, entrypoint, config, workPath,
 }) => {
-  const [
-    downloadedFiles,
-    entrypointFsDirname,
-  ] = await downloadInstallAndBundle(
+  const [downloadedFiles, entrypointFsDirname] = await downloadInstallAndBundle(
     { files, entrypoint, workPath },
     { npmArguments: ['--prefer-offline'] },
   );
@@ -123,9 +123,7 @@ exports.build = async ({
   let launcherData = await fs.readFile(launcherPath, 'utf8');
   launcherData = launcherData.replace(
     '// PLACEHOLDER',
-    [
-      `require("./${entrypoint}");`,
-    ].join(' '),
+    [`require("./${entrypoint}");`].join(' '),
   );
 
   const launcherFiles = {

packages/now-node-server/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@now/node-server",
-  "version": "0.5.4-canary.3",
+  "version": "0.6.1-canary.0",
   "license": "MIT",
   "repository": {
     "type": "git",
@@ -8,8 +8,8 @@
     "directory": "packages/now-node-server"
   },
   "dependencies": {
-    "@now/node-bridge": "^1.0.2-canary.2",
-    "@zeit/ncc": "0.17.3",
+    "@now/node-bridge": "^1.1.0",
+    "@zeit/ncc": "0.18.2",
     "fs-extra": "7.0.1"
   },
   "scripts": {

packages/now-node/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@now/node",
-  "version": "0.5.4-canary.4",
+  "version": "0.6.1-canary.0",
   "license": "MIT",
   "main": "./dist/index",
   "repository": {
@@ -9,8 +9,8 @@
     "directory": "packages/now-node"
   },
   "dependencies": {
-    "@now/node-bridge": "^1.0.2-canary.2",
-    "@zeit/ncc": "0.17.3",
+    "@now/node-bridge": "^1.1.0",
+    "@zeit/ncc": "0.18.2",
     "fs-extra": "7.0.1"
   },
   "scripts": {

packages/now-node/src/index.ts

@@ -46,7 +46,7 @@ async function compile(entrypointPath: string, entrypoint: string, config: Compi
   const inputDir = dirname(input);
   const rootIncludeFiles = inputDir.split(sep).pop() || '';
   const ncc = require('@zeit/ncc');
-  const { code, assets } = await ncc(input);
+  const { code, map, assets } = await ncc(input, { sourceMap: true, sourceMapRegister: true });
 
   if (config && config.includeFiles) {
     for (const pattern of config.includeFiles) {
@@ -73,9 +73,9 @@ async function compile(entrypointPath: string, entrypoint: string, config: Compi
   }
 
   const preparedFiles: Files = {};
-  const blob = new FileBlob({ data: code });
   // move all user code to 'user' subdirectory
-  preparedFiles[entrypoint] = blob;
+  preparedFiles[entrypoint] = new FileBlob({ data: code });
+  preparedFiles[`${entrypoint.replace('.ts', '.js')}.map`] = new FileBlob({ data: map });
   // eslint-disable-next-line no-restricted-syntax
   for (const assetName of Object.keys(assets)) {
     const { source: data, permissions: mode } = assets[assetName];

packages/now-node/test/fixtures/13-stack-trace/index.js

@@ -0,0 +1,10 @@
+module.exports = (req, res) => {
+  try {
+    if (req) {
+      throw new Error(`Should throw ${process.env.RANDOMNESS_ENV_VAR}`);
+    }
+    res.end(`Should not print ${process.env.RANDOMNESS_ENV_VAR}`);
+  } catch (error) {
+    res.end(error.stack);
+  }
+};

packages/now-node/test/fixtures/13-stack-trace/now.json

@@ -0,0 +1,12 @@
+{
+  "version": 2,
+  "builds": [
+    { "src": "index.js", "use": "@now/node" }
+  ],
+  "probes": [
+    {
+      "path": "/",
+      "mustContain": "index.js:4"
+    }
+  ]
+}

packages/now-node/test/fixtures/14-stack-trace-ts/index.ts

@@ -0,0 +1,10 @@
+export default function handler (req: any, res: any) {
+  try {
+    if (req) {
+      throw new Error(`Should throw`);
+    }
+    res.end(`Should not print`);
+  } catch (error) {
+    res.end(error.stack);
+  }
+}

packages/now-node/test/fixtures/14-stack-trace-ts/now.json

@@ -0,0 +1,12 @@
+{
+  "version": 2,
+  "builds": [
+    { "src": "index.ts", "use": "@now/node" }
+  ],
+  "probes": [
+    {
+      "path": "/",
+      "mustContain": "index.ts:4"
+    }
+  ]
+}

packages/now-node/test/fixtures/14-stack-trace-ts/tsconfig.json

@@ -0,0 +1,14 @@
+{
+    "compilerOptions": {
+      "strict": true,
+      "esModuleInterop": true,
+      "sourceMap": true,
+      "lib": ["esnext"],
+      "target": "esnext",
+      "module": "commonjs"
+    },
+    "include": [
+      "index.ts"
+    ]
+  }
+  

packages/now-optipng/.gitignore

@@ -0,0 +1,2 @@
+# build output
+/dist

packages/now-optipng/index.js

@@ -1,15 +0,0 @@
-const FileBlob = require('@now/build-utils/file-blob.js'); // eslint-disable-line import/no-extraneous-dependencies
-const OptiPng = require('optipng');
-const pipe = require('multipipe');
-
-exports.analyze = ({ files, entrypoint }) => files[entrypoint].digest;
-
-exports.build = async ({ files, entrypoint }) => {
-  const optimizer = new OptiPng(['-o9']);
-  const stream = pipe(
-    files[entrypoint].toStream(),
-    optimizer,
-  );
-  const result = await FileBlob.fromStream({ stream });
-  return { [entrypoint]: result };
-};

packages/now-optipng/package.json

@@ -1,7 +1,15 @@
 {
   "name": "@now/optipng",
-  "version": "0.4.9-canary.0",
+  "version": "0.5.0",
   "license": "MIT",
+  "main": "./dist/index",
+  "files": [
+    "dist"
+  ],
+  "scripts": {
+    "build": "tsc",
+    "test": "tsc && jest"
+  },
   "repository": {
     "type": "git",
     "url": "https://github.com/zeit/now-builders.git",
@@ -10,5 +18,9 @@
   "dependencies": {
     "multipipe": "2.0.3",
     "optipng": "1.1.0"
+  },
+  "devDependencies": {
+    "@types/node": "11.9.4",
+    "typescript": "3.3.3"
   }
 }

packages/now-optipng/src/index.ts

@@ -0,0 +1,22 @@
+// eslint-disable-line import/no-extraneous-dependencies
+import { 
+  FileBlob,
+  BuildOptions,
+  AnalyzeOptions
+} from '@now/build-utils'
+import OptiPng from 'optipng'
+import pipe from 'multipipe'
+
+export function analyze({ files, entrypoint }: AnalyzeOptions) {
+  return files[entrypoint].digest;
+}
+
+export async function build({ files, entrypoint }: BuildOptions) {
+  const optimizer = new OptiPng(['-o9']);
+  const stream = pipe(
+    files[entrypoint].toStream(),
+    optimizer
+  );
+  const result = await FileBlob.fromStream({ stream });
+  return { [entrypoint]: result };
+}

packages/now-optipng/test/fixtures/01-cowsay/now.json

@@ -0,0 +1,11 @@
+{
+    "version": 2,
+    "builds": [
+        { "src": "showcase.png", "use": "@now/optipng" },
+        { "src": "subdirectory/naruto.png", "use": "@now/optipng" }
+    ],
+    "probes": [
+        { "path": "/", "mustContain": "showcase.png" },
+        { "path": "/", "mustContain": "subdirectory" }
+    ]
+}