Publish Canary

- @now/next@2.2.1-canary.0

packages/now-next/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@now/next",
-  "version": "2.2.0",
+  "version": "2.2.1-canary.0",
   "license": "MIT",
   "main": "./dist/index",
   "homepage": "https://zeit.co/docs/runtimes#official-runtimes/next-js",

packages/now-next/src/index.ts

@@ -1,16 +1,3 @@
-import { ChildProcess, fork } from 'child_process';
-import {
-  pathExists,
-  readFile,
-  unlink as unlinkFile,
-  writeFile,
-  lstatSync,
-} from 'fs-extra';
-import os from 'os';
-import path from 'path';
-import resolveFrom from 'resolve-from';
-import semver from 'semver';
-
 import {
   BuildOptions,
   Config,
@@ -20,6 +7,7 @@ import {
   FileBlob,
   FileFsRef,
   Files,
+  getLambdaOptionsFromFunction,
   getNodeVersion,
   getSpawnOptions,
   glob,
@@ -30,10 +18,24 @@ import {
   Route,
   runNpmInstall,
   runPackageJsonScript,
-  getLambdaOptionsFromFunction,
 } from '@now/build-utils';
+import {
+  convertRedirects,
+  convertRewrites,
+} from '@now/routing-utils/dist/superstatic';
 import nodeFileTrace, { NodeFileTraceReasons } from '@zeit/node-file-trace';
-
+import { ChildProcess, fork } from 'child_process';
+import {
+  lstatSync,
+  pathExists,
+  readFile,
+  unlink as unlinkFile,
+  writeFile,
+} from 'fs-extra';
+import os from 'os';
+import path from 'path';
+import resolveFrom from 'resolve-from';
+import semver from 'semver';
 import createServerlessConfig from './create-serverless-config';
 import nextLegacyVersions from './legacy-versions';
 import {
@@ -43,10 +45,14 @@ import {
   excludeFiles,
   ExperimentalTraceVersion,
   getDynamicRoutes,
+  getExportIntent,
+  getExportStatus,
   getNextConfig,
   getPathsInside,
   getPrerenderManifest,
   getRoutes,
+  getRoutesManifest,
+  getSourceFilePathFromPage,
   isDynamicRoute,
   normalizePackageJson,
   normalizePage,
@@ -54,15 +60,8 @@ import {
   stringMap,
   syncEnvVars,
   validateEntrypoint,
-  getSourceFilePathFromPage,
-  getRoutesManifest,
 } from './utils';
 
-import {
-  convertRedirects,
-  convertRewrites,
-} from '@now/routing-utils/dist/superstatic';
-
 interface BuildParamsMeta {
   isDev: boolean | undefined;
   env?: EnvConfig;
@@ -355,6 +354,100 @@ export const build = async ({
     }
   }
 
+  const exportIntent = await getExportIntent(entryPath);
+  if (exportIntent) {
+    const { trailingSlash } = exportIntent;
+
+    const userExport = await getExportStatus(entryPath);
+    if (!userExport) {
+      await writePackageJson(entryPath, {
+        ...pkg,
+        scripts: {
+          ...pkg.scripts,
+          'now-automatic-next-export': `next export --outdir "${path.resolve(
+            entryPath,
+            'out'
+          )}"`,
+        },
+      });
+
+      await runPackageJsonScript(entryPath, 'now-automatic-next-export', {
+        ...spawnOpts,
+        env,
+      });
+    }
+
+    const resultingExport = await getExportStatus(entryPath);
+    if (!resultingExport) {
+      throw new Error(
+        'Exporting Next.js app failed. Please check your build logs and contact us if this continues.'
+      );
+    }
+
+    if (resultingExport.success !== true) {
+      throw new Error(
+        'Export of Next.js app failed. Please check your build logs.'
+      );
+    }
+
+    const outDirectory = resultingExport.outDirectory;
+
+    debug(`next export should use trailing slash: ${trailingSlash}`);
+
+    // This handles pages, `public/`, and `static/`.
+    const filesAfterBuild = await glob('**', outDirectory);
+
+    const output: Files = { ...filesAfterBuild };
+
+    // Strip `.html` extensions from build output
+    Object.entries(output)
+      .filter(([name]) => name.endsWith('.html'))
+      .forEach(([name, value]) => {
+        const cleanName = name.slice(0, -5);
+        delete output[name];
+        output[cleanName] = value;
+        if (value.type === 'FileBlob' || value.type === 'FileFsRef') {
+          value.contentType = value.contentType || 'text/html; charset=utf-8';
+        }
+      });
+
+    return {
+      output,
+      routes: [
+        // TODO: low priority: handle trailingSlash
+
+        // redirects take the highest priority
+        ...redirects,
+        // Before we handle static files we need to set proper caching headers
+        {
+          // This ensures we only match known emitted-by-Next.js files and not
+          // user-emitted files which may be missing a hash in their filename.
+          src: path.join(
+            '/',
+            entryDirectory,
+            '_next/static/(?:[^/]+/pages|chunks|runtime|css|media)/.+'
+          ),
+          // Next.js assets contain a hash or entropy in their filenames, so they
+          // are guaranteed to be unique and cacheable indefinitely.
+          headers: { 'cache-control': 'public,max-age=31536000,immutable' },
+          continue: true,
+        },
+        {
+          src: path.join('/', entryDirectory, '_next(?!/data(?:/|$))(?:/.*)?'),
+        },
+        // Next.js pages, `static/` folder, reserved assets, and `public/`
+        // folder
+        { handle: 'filesystem' },
+        ...rewrites,
+
+        // Dynamic routes
+        // TODO: do we want to do this?: ...dynamicRoutes,
+      ],
+      watch: [],
+      childProcesses: [],
+    };
+  }
+
   if (isLegacy) {
     debug('Running npm install --production...');
     await runNpmInstall(

packages/now-next/src/utils.ts

@@ -624,6 +624,73 @@ export type NextPrerenderedRoutes = {
   };
 };
 
+export async function getExportIntent(
+  entryPath: string
+): Promise<false | { trailingSlash: boolean }> {
+  const pathExportMarker = path.join(entryPath, '.next', 'export-marker.json');
+  const hasExportMarker: boolean = await fs
+    .access(pathExportMarker, fs.constants.F_OK)
+    .then(() => true)
+    .catch(() => false);
+
+  if (!hasExportMarker) {
+    return false;
+  }
+
+  const manifest: {
+    version: 1;
+    exportTrailingSlash: boolean;
+    hasExportPathMap: boolean;
+  } = JSON.parse(await fs.readFile(pathExportMarker, 'utf8'));
+
+  switch (manifest.version) {
+    case 1: {
+      if (manifest.hasExportPathMap !== true) {
+        return false;
+      }
+
+      return { trailingSlash: manifest.exportTrailingSlash };
+    }
+
+    default: {
+      return false;
+    }
+  }
+}
+
+export async function getExportStatus(
+  entryPath: string
+): Promise<false | { success: boolean; outDirectory: string }> {
+  const pathExportDetail = path.join(entryPath, '.next', 'export-detail.json');
+  const hasExportDetail: boolean = await fs
+    .access(pathExportDetail, fs.constants.F_OK)
+    .then(() => true)
+    .catch(() => false);
+
+  if (!hasExportDetail) {
+    return false;
+  }
+
+  const manifest: {
+    version: 1;
+    success: boolean;
+    outDirectory: string;
+  } = JSON.parse(await fs.readFile(pathExportDetail, 'utf8'));
+
+  switch (manifest.version) {
+    case 1: {
+      return {
+        success: !!manifest.success,
+        outDirectory: manifest.outDirectory,
+      };
+    }
+
+    default: {
+      return false;
+    }
+  }
+}
+
 export async function getPrerenderManifest(
   entryPath: string
 ): Promise<NextPrerenderedRoutes> {

packages/now-next/test/fixtures/10-export-cache-headers/next.config.js

@@ -0,0 +1,5 @@
+module.exports = {
+  generateBuildId() {
+    return 'testing-build-id';
+  },
+};

packages/now-next/test/fixtures/10-export-cache-headers/now.json

@@ -0,0 +1,12 @@
+{
+  "version": 2,
+  "builds": [{ "src": "package.json", "use": "@now/next" }],
+  "probes": [
+    {
+      "path": "/_next/static/testing-build-id/pages/index.js",
+      "responseHeaders": {
+        "cache-control": "public,max-age=31536000,immutable"
+      }
+    }
+  ]
+}

packages/now-next/test/fixtures/10-export-cache-headers/package.json

@@ -0,0 +1,10 @@
+{
+  "scripts": {
+    "build": "next build && next export"
+  },
+  "dependencies": {
+    "next": "canary",
+    "react": "^16.8.6",
+    "react-dom": "^16.8.6"
+  }
+}

packages/now-next/test/fixtures/10-export-cache-headers/pages/index.js

@@ -0,0 +1 @@
+export default () => 'Hi';

packages/now-next/test/fixtures/11-export-clean-urls/next.config.js

@@ -0,0 +1,5 @@
+module.exports = {
+  generateBuildId() {
+    return 'testing-build-id';
+  },
+};

packages/now-next/test/fixtures/11-export-clean-urls/now.json

@@ -0,0 +1,14 @@
+{
+  "version": 2,
+  "builds": [{ "src": "package.json", "use": "@now/next" }],
+  "probes": [
+    {
+      "path": "/",
+      "mustContain": "Hi There"
+    },
+    {
+      "path": "/about",
+      "mustContain": "Hi on About"
+    }
+  ]
+}

packages/now-next/test/fixtures/11-export-clean-urls/package.json

@@ -0,0 +1,10 @@
+{
+  "scripts": {
+    "build": "next build && next export"
+  },
+  "dependencies": {
+    "next": "canary",
+    "react": "^16.8.6",
+    "react-dom": "^16.8.6"
+  }
+}

packages/now-next/test/fixtures/11-export-clean-urls/pages/about.js

@@ -0,0 +1,7 @@
+function About() {
+  return <div>Hi on About</div>;
+}
+
+About.getInitialProps = () => ({});
+
+export default About;

packages/now-next/test/fixtures/11-export-clean-urls/pages/index.js

@@ -0,0 +1,7 @@
+function Home() {
+  return <div>Hi There</div>;
+}
+
+Home.getInitialProps = () => ({});
+
+export default Home;

packages/now-next/test/fixtures/12-export-auto/next.config.js

@@ -0,0 +1,6 @@
+module.exports = {
+  generateBuildId() {
+    return 'testing-build-id';
+  },
+  exportPathMap: d => d,
+};

packages/now-next/test/fixtures/12-export-auto/now.json

@@ -0,0 +1,14 @@
+{
+  "version": 2,
+  "builds": [{ "src": "package.json", "use": "@now/next" }],
+  "probes": [
+    {
+      "path": "/",
+      "mustContain": "Hi There"
+    },
+    {
+      "path": "/about",
+      "mustContain": "Hi on About"
+    }
+  ]
+}

packages/now-next/test/fixtures/12-export-auto/package.json

@@ -0,0 +1,7 @@
+{
+  "dependencies": {
+    "next": "canary",
+    "react": "^16.8.6",
+    "react-dom": "^16.8.6"
+  }
+}

packages/now-next/test/fixtures/12-export-auto/pages/about.js

@@ -0,0 +1,7 @@
+function About() {
+  return <div>Hi on About</div>;
+}
+
+About.getInitialProps = () => ({});
+
+export default About;

packages/now-next/test/fixtures/12-export-auto/pages/index.js

@@ -0,0 +1,7 @@
+function Home() {
+  return <div>Hi There</div>;
+}
+
+Home.getInitialProps = () => ({});
+
+export default Home;