Publish Stable

- @vercel/python@2.1.0

.github/workflows/cancel.yml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     timeout-minutes: 2
     steps:
-      - uses: styfle/cancel-workflow-action@0.4.1
+      - uses: styfle/cancel-workflow-action@0.9.1
         with:
           workflow_id: 849295, 849296, 849297, 849298
           access_token: ${{ github.token }}

.github/workflows/test-integration-dev.yml

@@ -11,7 +11,7 @@ on:
 jobs:
   test:
     name: Dev
-    timeout-minutes: 60
+    timeout-minutes: 75
     strategy:
       fail-fast: false
       matrix:

.gitignore

@@ -27,3 +27,4 @@ test/lib/deployment/failed-page.txt
 /public
 __pycache__
 .vercel
+.output

DEVELOPING_A_RUNTIME.md

@@ -332,7 +332,7 @@ This is an abstract enumeration type that is implemented by one of the following
 - `nodejs10.x`
 - `go1.x`
 - `java11`
-- `python3.8`
+- `python3.9`
 - `python3.6`
 - `dotnetcore2.1`
 - `ruby2.5`
@@ -398,12 +398,12 @@ This utility allows you to _scan_ the filesystem and return a [`Files`](#files)
 The following trivial example downloads everything to the filesystem, only to return it back (therefore just re-creating the passed-in [`Files`](#files)):
 
 ```js
-const { glob, download } = require('@vercel/build-utils')
+const { glob, download } = require('@vercel/build-utils');
 
 exports.build = ({ files, workPath }) => {
-  await download(files, workPath)
+  await download(files, workPath);
-  return glob('**', workPath)
+  return glob('**', workPath);
-}
+};
 ```
 
 ### `getWritableDirectory()`

api/frameworks.ts

@@ -14,8 +14,6 @@ const frameworks = (_frameworks as Framework[])
       sort: undefined,
       dependency: undefined,
       defaultRoutes: undefined,
-      devCommand: undefined,
-      buildCommand: undefined,
     };
 
     if (framework.logo) {

packages/build-utils/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@vercel/build-utils",
-  "version": "2.12.3-canary.17",
+  "version": "2.12.3-canary.20",
   "license": "MIT",
   "main": "./dist/index.js",
   "types": "./dist/index.d.js",
@@ -30,7 +30,7 @@
     "@types/node-fetch": "^2.1.6",
     "@types/semver": "6.0.0",
     "@types/yazl": "^2.4.1",
-    "@vercel/frameworks": "0.5.1-canary.11",
+    "@vercel/frameworks": "0.5.1-canary.12",
     "@vercel/ncc": "0.24.0",
     "aggregate-error": "3.0.1",
     "async-retry": "1.2.3",

packages/build-utils/src/convert-runtime-to-plugin.ts

@@ -2,7 +2,7 @@ import fs from 'fs-extra';
 import { join, dirname, relative } from 'path';
 import glob from './fs/glob';
 import { normalizePath } from './fs/normalize-path';
-import { FILES_SYMBOL, Lambda } from './lambda';
+import { FILES_SYMBOL, getLambdaOptionsFromFunction, Lambda } from './lambda';
 import type FileBlob from './file-blob';
 import type { BuilderFunctions, BuildOptions, Files } from './types';
 import minimatch from 'minimatch';
@@ -21,8 +21,8 @@ export function convertRuntimeToPlugin(
     const files = await glob('**', opts);
     delete files['vercel.json']; // Builders/Runtimes didn't have vercel.json
     const entrypoints = await glob(`api/**/*${ext}`, opts);
-    const functionsManifest: { [key: string]: any } = {};
+    const pages: { [key: string]: any } = {};
-    const functions = await readVercelConfigFunctions(workPath);
+    const { functions = {} } = await readVercelConfig(workPath);
     const traceDir = join(workPath, '.output', 'runtime-traced-files');
     await fs.ensureDir(traceDir);
 
@@ -44,11 +44,11 @@ export function convertRuntimeToPlugin(
         },
       });
 
-      functionsManifest[entrypoint] = {
+      pages[entrypoint] = {
         handler: output.handler,
         runtime: output.runtime,
-        memory: config.memory || output.memory,
+        memory: output.memory,
-        maxDuration: config.maxDuration || output.maxDuration,
+        maxDuration: output.maxDuration,
         environment: output.environment,
         allowQuery: output.allowQuery,
         regions: output.regions,
@@ -98,10 +98,7 @@ export function convertRuntimeToPlugin(
       await fs.writeFile(nft, json);
     }
 
-    await fs.writeFile(
+    await updateFunctionsManifest({ workPath, pages });
-      join(workPath, '.output', 'functions-manifest.json'),
-      JSON.stringify(functionsManifest)
-    );
   };
 }
 
@@ -115,14 +112,10 @@ async function linkOrCopy(existingPath: string, newPath: string) {
   }
 }
 
-async function readVercelConfigFunctions(
+async function readJson(filePath: string): Promise<{ [key: string]: any }> {
-  workPath: string
-): Promise<BuilderFunctions> {
-  const vercelJsonPath = join(workPath, 'vercel.json');
   try {
-    const str = await fs.readFile(vercelJsonPath, 'utf8');
+    const str = await fs.readFile(filePath, 'utf8');
-    const obj = JSON.parse(str);
+    return JSON.parse(str);
-    return obj.functions || {};
   } catch (err) {
     if (err.code === 'ENOENT') {
       return {};
@@ -130,3 +123,80 @@ async function readVercelConfigFunctions(
     throw err;
   }
 }
+
+async function readVercelConfig(
+  workPath: string
+): Promise<{ functions?: BuilderFunctions; regions?: string[] }> {
+  const vercelJsonPath = join(workPath, 'vercel.json');
+  return readJson(vercelJsonPath);
+}
+
+/**
+ * If `.output/functions-manifest.json` exists, append to the pages
+ * property. Otherwise write a new file. This will also read `vercel.json`
+ * and apply relevant `functions` property config.
+ */
+export async function updateFunctionsManifest({
+  workPath,
+  pages,
+}: {
+  workPath: string;
+  pages: { [key: string]: any };
+}) {
+  const functionsManifestPath = join(
+    workPath,
+    '.output',
+    'functions-manifest.json'
+  );
+  const vercelConfig = await readVercelConfig(workPath);
+  const functionsManifest = await readJson(functionsManifestPath);
+
+  if (!functionsManifest.version) functionsManifest.version = 1;
+  if (!functionsManifest.pages) functionsManifest.pages = {};
+
+  for (const [pageKey, pageConfig] of Object.entries(pages)) {
+    const fnConfig = await getLambdaOptionsFromFunction({
+      sourceFile: pageKey,
+      config: vercelConfig,
+    });
+    functionsManifest.pages[pageKey] = {
+      ...pageConfig,
+      memory: fnConfig.memory || pageConfig.memory,
+      maxDuration: fnConfig.maxDuration || pageConfig.maxDuration,
+      regions: vercelConfig.regions || pageConfig.regions,
+    };
+  }
+
+  await fs.writeFile(functionsManifestPath, JSON.stringify(functionsManifest));
+}
+
+/**
+ * Will append routes to the `routes-manifest.json` file.
+ * If the file does not exist, it'll be created.
+ */
+export async function updateRoutesManifest({
+  workPath,
+  dynamicRoutes,
+}: {
+  workPath: string;
+  dynamicRoutes?: {
+    page: string;
+    regex: string;
+    namedRegex?: string;
+    routeKeys?: { [named: string]: string };
+  }[];
+}) {
+  const routesManifestPath = join(workPath, '.output', 'routes-manifest.json');
+
+  const routesManifest = await readJson(routesManifestPath);
+
+  if (!routesManifest.version) routesManifest.version = 1;
+  if (routesManifest.pages404 === undefined) routesManifest.pages404 = true;
+
+  if (dynamicRoutes) {
+    if (!routesManifest.dynamicRoutes) routesManifest.dynamicRoutes = [];
+    routesManifest.dynamicRoutes.push(...dynamicRoutes);
+  }
+
+  await fs.writeFile(routesManifestPath, JSON.stringify(routesManifest));
+}

packages/build-utils/src/index.ts

@@ -82,7 +82,11 @@ export { detectFramework } from './detect-framework';
 export { DetectorFilesystem } from './detectors/filesystem';
 export { readConfigFile } from './fs/read-config-file';
 export { normalizePath } from './fs/normalize-path';
-export { convertRuntimeToPlugin } from './convert-runtime-to-plugin';
+export {
+  convertRuntimeToPlugin,
+  updateFunctionsManifest,
+  updateRoutesManifest,
+} from './convert-runtime-to-plugin';
 
 export * from './schemas';
 export * from './types';

packages/build-utils/src/lambda.ts

@@ -36,7 +36,7 @@ interface CreateLambdaOptions {
 
 interface GetLambdaOptionsFromFunctionOptions {
   sourceFile: string;
-  config?: Config;
+  config?: Pick<Config, 'functions'>;
 }
 
 export const FILES_SYMBOL = Symbol('files');

packages/build-utils/test/unit.convert-runtime-to-plugin.test.ts

@@ -71,9 +71,12 @@ describe('convert-runtime-to-plugin', () => {
 
     const funcManifest = JSON.parse(output['functions-manifest.json']);
     expect(funcManifest).toMatchObject({
-      'api/index.py': lambdaOptions,
+      version: 1,
-      'api/users/get.py': lambdaOptions,
+      pages: {
-      'api/users/post.py': { ...lambdaOptions, memory: 3008 },
+        'api/index.py': lambdaOptions,
+        'api/users/get.py': lambdaOptions,
+        'api/users/post.py': { ...lambdaOptions, memory: 3008 },
+      },
     });
 
     const indexJson = JSON.parse(output.server.pages.api['index.py.nft.json']);

packages/cli/package.json

@@ -1,6 +1,6 @@
 {
   "name": "vercel",
-  "version": "23.1.3-canary.28",
+  "version": "23.1.3-canary.38",
   "preferGlobal": true,
   "license": "Apache-2.0",
   "description": "The command-line interface for Vercel",
@@ -43,14 +43,14 @@
     "node": ">= 12"
   },
   "dependencies": {
-    "@vercel/build-utils": "2.12.3-canary.17",
+    "@vercel/build-utils": "2.12.3-canary.20",
-    "@vercel/go": "1.2.4-canary.3",
+    "@vercel/go": "1.2.4-canary.4",
-    "@vercel/node": "1.12.2-canary.6",
+    "@vercel/node": "1.12.2-canary.7",
-    "@vercel/python": "2.0.6-canary.5",
+    "@vercel/python": "2.1.0",
     "@vercel/ruby": "1.2.8-canary.4",
     "update-notifier": "4.1.0",
-    "vercel-plugin-middleware": "0.0.0-canary.6",
+    "vercel-plugin-middleware": "0.0.0-canary.7",
-    "vercel-plugin-node": "1.12.2-canary.7"
+    "vercel-plugin-node": "1.12.2-canary.11"
   },
   "devDependencies": {
     "@next/env": "11.1.2",
@@ -90,7 +90,7 @@
     "@types/update-notifier": "5.1.0",
     "@types/which": "1.3.2",
     "@types/write-json-file": "2.2.1",
-    "@vercel/frameworks": "0.5.1-canary.11",
+    "@vercel/frameworks": "0.5.1-canary.12",
     "@vercel/ncc": "0.24.0",
     "@vercel/nft": "0.17.0",
     "@zeit/fun": "0.11.2",

packages/cli/src/commands/build.ts

@@ -30,10 +30,7 @@ import { getCommandName, getPkgName } from '../util/pkg-name';
 import { loadCliPlugins } from '../util/plugins';
 import { findFramework } from '../util/projects/find-framework';
 import { VERCEL_DIR } from '../util/projects/link';
-import {
+import { readProjectSettings } from '../util/projects/project-settings';
-  ProjectLinkAndSettings,
-  readProjectSettings,
-} from '../util/projects/project-settings';
 import pull from './pull';
 
 const sema = new Sema(16, {
@@ -68,16 +65,23 @@ const help = () => {
 
 const OUTPUT_DIR = '.output';
 
-const fields: {
-  name: string;
-  value: keyof ProjectLinkAndSettings['settings'];
-}[] = [
-  { name: 'Build Command', value: 'buildCommand' },
-  { name: 'Output Directory', value: 'outputDirectory' },
-  { name: 'Root Directory', value: 'rootDirectory' },
-];
-
 export default async function main(client: Client) {
+  if (process.env.__VERCEL_BUILD_RUNNING) {
+    client.output.error(
+      `${cmd(
+        `${getPkgName()} build`
+      )} must not recursively invoke itself. Check the Build Command in the Project Settings or the ${cmd(
+        'build'
+      )} script in ${cmd('package.json')}`
+    );
+    client.output.error(
+      `Learn More: https://vercel.link/recursive-invocation-of-commands`
+    );
+    return 1;
+  } else {
+    process.env.__VERCEL_BUILD_RUNNING = '1';
+  }
+
   let argv;
   const buildStamp = stamp();
   try {
@@ -152,47 +156,57 @@ export default async function main(client: Client) {
   }
 
   const buildState = { ...project.settings };
-
+  const formatSetting = (
-  client.output.log(`Retrieved Project Settings:`);
+    name: string,
-  client.output.print(
+    override: string | null | undefined,
-    chalk.dim(`  - ${chalk.bold(`Framework Preset:`)} ${framework.name}\n`)
+    defaults: typeof framework.settings.outputDirectory
+  ) =>
+    `  - ${chalk.bold(`${name}:`)} ${`${
+      override
+        ? override + ` (override)`
+        : 'placeholder' in defaults
+        ? chalk.italic(`${defaults.placeholder}`)
+        : defaults.value
+    }`}`;
+  console.log(`Retrieved Project Settings:`);
+  console.log(
+    chalk.dim(`  - ${chalk.bold(`Framework Preset:`)} ${framework.name}`)
+  );
+  console.log(
+    chalk.dim(
+      formatSetting(
+        'Build Command',
+        project.settings.buildCommand,
+        framework.settings.buildCommand
+      )
+    )
+  );
+  console.log(
+    chalk.dim(
+      formatSetting(
+        'Output Directory',
+        project.settings.outputDirectory,
+        framework.settings.outputDirectory
+      )
+    )
   );
 
-  for (let field of fields) {
+  buildState.outputDirectory =
-    const defaults = (framework.settings as any)[field.value];
+    project.settings.outputDirectory ||
-    if (defaults) {
+    (isSettingValue(framework.settings.outputDirectory)
-      client.output.print(
+      ? framework.settings.outputDirectory.value
-        chalk.dim(
+      : null);
-          `  - ${chalk.bold(`${field.name}:`)} ${`${
+  buildState.rootDirectory = project.settings.rootDirectory;
-            project.settings[field.value]
-              ? project.settings[field.value] + ` (override)`
-              : isSettingValue(defaults)
-              ? defaults.value
-              : chalk.italic(`${defaults.placeholder}`)
-          }`}\n`
-        )
-      );
-    }
-    if (field.value != 'buildCommand') {
-      (buildState as any)[field.value] = project.settings[field.value]
-        ? project.settings[field.value]
-        : defaults
-        ? isSettingValue(defaults)
-          ? defaults.value
-          : null
-        : null;
-    }
-  }
 
   if (loadedEnvFiles.length > 0) {
-    client.output.log(
+    console.log(
       `Loaded Environment Variables from ${loadedEnvFiles.length} ${pluralize(
         'file',
         loadedEnvFiles.length
       )}:`
     );
     for (let envFile of loadedEnvFiles) {
-      client.output.print(chalk.dim(`  - ${envFile.path}\n`));
+      console.log(chalk.dim(`  - ${envFile.path}`));
     }
   }
 
@@ -223,7 +237,7 @@ export default async function main(client: Client) {
   };
 
   if (plugins?.pluginCount && plugins?.pluginCount > 0) {
-    client.output.log(
+    console.log(
       `Loaded ${plugins.pluginCount} CLI ${pluralize(
         'Plugin',
         plugins.pluginCount
@@ -231,7 +245,7 @@ export default async function main(client: Client) {
     );
     // preBuild Plugins
     if (plugins.preBuildPlugins.length > 0) {
-      client.output.log(
+      console.log(
         `Running ${plugins.pluginCount} CLI ${pluralize(
           'Plugin',
           plugins.pluginCount
@@ -269,17 +283,19 @@ export default async function main(client: Client) {
   // Clean the output directory
   fs.removeSync(join(cwd, OUTPUT_DIR));
 
+  // Yarn v2 PnP mode may be activated, so force
+  // "node-modules" linker style
+  const env = {
+    YARN_NODE_LINKER: 'node-modules',
+    ...spawnOpts.env,
+  };
+
   if (typeof buildState.buildCommand === 'string') {
-    client.output.log(`Running Build Command: ${cmd(buildState.buildCommand)}`);
+    console.log(`Running Build Command: ${cmd(buildState.buildCommand)}`);
     await execCommand(buildState.buildCommand, {
       ...spawnOpts,
-      // Yarn v2 PnP mode may be activated, so force
+      env,
-      // "node-modules" linker style
+      cwd,
-      env: {
-        YARN_NODE_LINKER: 'node-modules',
-        ...spawnOpts.env,
-      },
-      cwd: cwd,
     });
   } else if (fs.existsSync(join(cwd, 'package.json'))) {
     await runPackageJsonScript(
@@ -288,6 +304,15 @@ export default async function main(client: Client) {
       ['vercel-build', 'now-build', 'build'],
       spawnOpts
     );
+  } else if (typeof framework.settings.buildCommand.value === 'string') {
+    console.log(
+      `Running Build Command: ${cmd(framework.settings.buildCommand.value)}`
+    );
+    await execCommand(framework.settings.buildCommand.value, {
+      ...spawnOpts,
+      env,
+      cwd,
+    });
   }
 
   if (!fs.existsSync(join(cwd, OUTPUT_DIR))) {
@@ -336,7 +361,7 @@ export default async function main(client: Client) {
       )
     );
     client.output.stopSpinner();
-    client.output.log(
+    console.log(
       `Copied ${files.length.toLocaleString()} files from ${param(
         distDir
       )} to ${param(outputDir)} ${copyStamp()}`
@@ -557,7 +582,7 @@ export default async function main(client: Client) {
 
   // Build Plugins
   if (plugins?.buildPlugins && plugins.buildPlugins.length > 0) {
-    client.output.log(
+    console.log(
       `Running ${plugins.pluginCount} CLI ${pluralize(
         'Plugin',
         plugins.pluginCount
@@ -592,13 +617,13 @@ export default async function main(client: Client) {
     }
   }
 
-  client.output.print(
+  console.log(
     `${prependEmoji(
       `Build Completed in ${chalk.bold(OUTPUT_DIR)} ${chalk.gray(
         buildStamp()
       )}`,
       emoji('success')
-    )}\n`
+    )}`
   );
 
   return 0;
@@ -644,25 +669,37 @@ export async function runPackageJsonScript(
     }
   }
 
-  client.output.log(`Running Build Command: ${cmd(opts.prettyCommand)}\n`);
+  console.log(`Running Build Command: ${cmd(opts.prettyCommand)}\n`);
   await spawnAsync(cliType, ['run', scriptName], opts);
-  client.output.print('\n'); // give it some room
+  console.log(); // give it some room
   client.output.debug(`Script complete [${Date.now() - runScriptTime}ms]`);
   return true;
 }
 
 async function linkOrCopy(existingPath: string, newPath: string) {
   try {
-    await fs.createLink(existingPath, newPath);
+    if (
+      newPath.endsWith('.nft.json') ||
+      newPath.endsWith('middleware-manifest.json') ||
+      newPath.endsWith('required-server-files.json')
+    ) {
+      await fs.copy(existingPath, newPath, {
+        overwrite: true,
+      });
+    } else {
+      await fs.createLink(existingPath, newPath);
+    }
   } catch (err: any) {
     // eslint-disable-line
-    // If a hard link to the same file already exists
+    // If a symlink to the same file already exists
     // then trying to copy it will make an empty file from it.
     if (err['code'] === 'EEXIST') return;
-    // In some VERY rare cases (1 in a thousand), hard-link creation fails on Windows.
+    // In some VERY rare cases (1 in a thousand), symlink creation fails on Windows.
     // In that case, we just fall back to copying.
     // This issue is reproducible with "pnpm add @material-ui/icons@4.9.1"
-    await fs.copyFile(existingPath, newPath);
+    await fs.copy(existingPath, newPath, {
+      overwrite: true,
+    });
   }
 }
 

packages/cli/src/commands/dev/dev.ts

@@ -6,7 +6,6 @@ import { ProjectEnvVariable } from '../../types';
 import Client from '../../util/client';
 import { getLinkedProject } from '../../util/projects/link';
 import { getFrameworks } from '../../util/get-frameworks';
-import { isSettingValue } from '../../util/is-setting-value';
 import { ProjectSettings } from '../../types';
 import getDecryptedEnvRecords from '../../util/get-decrypted-env-records';
 import setupAndLink from '../../util/link/setup-and-link';
@@ -71,9 +70,9 @@ export default async function dev(
           frameworkSlug = framework.slug;
         }
 
-        const defaults = framework.settings.devCommand;
+        const defaults = framework.settings.devCommand.value;
-        if (isSettingValue(defaults)) {
+        if (defaults) {
-          devCommand = defaults.value;
+          devCommand = defaults;
         }
       }
     }

packages/cli/src/commands/dev/index.ts

@@ -48,6 +48,22 @@ const help = () => {
 };
 
 export default async function main(client: Client) {
+  if (process.env.__VERCEL_DEV_RUNNING) {
+    client.output.error(
+      `${cmd(
+        `${getPkgName()} dev`
+      )} must not recursively invoke itself. Check the Development Command in the Project Settings or the ${cmd(
+        'dev'
+      )} script in ${cmd('package.json')}`
+    );
+    client.output.error(
+      `Learn More: https://vercel.link/recursive-invocation-of-commands`
+    );
+    return 1;
+  } else {
+    process.env.__VERCEL_DEV_RUNNING = '1';
+  }
+
   let argv;
   let args;
   const { output } = client;
@@ -90,22 +106,21 @@ export default async function main(client: Client) {
     if (pkg) {
       const { scripts } = pkg as PackageJson;
 
-      if (scripts && scripts.dev && /\bnow\b\W+\bdev\b/.test(scripts.dev)) {
+      if (
-        output.error(
+        scripts &&
-          `The ${cmd('dev')} script in ${cmd(
+        scripts.dev &&
-            'package.json'
+        /\b(now|vercel)\b\W+\bdev\b/.test(scripts.dev)
-          )} must not contain ${cmd('now dev')}`
+      ) {
+        client.output.error(
+          `${cmd(
+            `${getPkgName()} dev`
+          )} must not recursively invoke itself. Check the Development Command in the Project Settings or the ${cmd(
+            'dev'
+          )} script in ${cmd('package.json')}`
         );
-        output.error(`Learn More: http://err.sh/vercel/now-dev-as-dev-script`);
+        client.output.error(
-        return 1;
+          `Learn More: https://vercel.link/recursive-invocation-of-commands`
-      }
-      if (scripts && scripts.dev && /\bvercel\b\W+\bdev\b/.test(scripts.dev)) {
-        output.error(
-          `The ${cmd('dev')} script in ${cmd(
-            'package.json'
-          )} must not contain ${cmd('vercel dev')}`
         );
-        output.error(`Learn More: http://err.sh/vercel/now-dev-as-dev-script`);
         return 1;
       }
     }

packages/cli/src/index.ts

@@ -160,24 +160,26 @@ const main = async () => {
   //  * a path to deploy (as in: `vercel path/`)
   //  * a subcommand (as in: `vercel ls`)
   const targetOrSubcommand = argv._[2];
+  const isBuildOrDev =
+    targetOrSubcommand === 'build' || targetOrSubcommand === 'dev';
 
-  output.print(
+  if (isBuildOrDev) {
-    `${chalk.grey(
+    console.log(
-      `${getTitleName()} CLI ${pkg.version}${
+      `${chalk.grey(
-        targetOrSubcommand === 'dev'
+        `${getTitleName()} CLI ${
-          ? ' dev (beta)'
+          pkg.version
-          : targetOrSubcommand === 'build'
+        } ${targetOrSubcommand} (beta) — https://vercel.com/feedback`
-          ? ' build (beta)'
+      )}`
-          : ''
+    );
-      }${
+  } else {
-        isCanary ||
+    output.print(
-        targetOrSubcommand === 'dev' ||
+      `${chalk.grey(
-        targetOrSubcommand === 'build'
+        `${getTitleName()} CLI ${pkg.version}${
-          ? ' — https://vercel.com/feedback'
+          isCanary ? ' — https://vercel.com/feedback' : ''
-          : ''
+        }`
-      }`
+      )}\n`
-    )}\n`
+    );
-  );
+  }
 
   // Handle `--version` directly
   if (!targetOrSubcommand && argv['--version']) {

packages/cli/src/util/config/global-path.ts

@@ -18,12 +18,8 @@ export const isDirectory = (path: string): boolean => {
 const getGlobalPathConfig = (): string => {
   let customPath: string | undefined;
 
-  try {
+  const argv = getArgs(process.argv.slice(2), {}, { permissive: true });
-    const argv = getArgs(process.argv.slice(2), {});
+  customPath = argv['--global-config'];
-    customPath = argv['--global-config'];
-  } catch (_error) {
-    // args are optional so consume error
-  }
 
   const vercelDirectories = XDGAppPaths('com.vercel.cli').dataDirs();
 

packages/cli/src/util/config/local-path.ts

@@ -7,12 +7,8 @@ import getArgs from '../../util/get-args';
 export default function getLocalPathConfig(prefix: string) {
   let customPath: string | undefined;
 
-  try {
+  const argv = getArgs(process.argv.slice(2), {}, { permissive: true });
-    const argv = getArgs(process.argv.slice(2), {});
+  customPath = argv['--local-config'];
-    customPath = argv['--local-config'];
-  } catch (_error) {
-    // args are optional so consume error
-  }
 
   // If `--local-config` flag was specified, then that takes priority
   if (customPath) {

packages/cli/src/util/dev/server.ts

@@ -1358,13 +1358,20 @@ export default class DevServer {
       this.cwd,
       this.output
     );
-    for (let plugin of devMiddlewarePlugins) {
+    try {
-      const result = await plugin.plugin.runDevMiddleware(req, res, this.cwd);
+      for (let plugin of devMiddlewarePlugins) {
-      if (result.finished) {
+        const result = await plugin.plugin.runDevMiddleware(req, res, this.cwd);
-        return result;
+        if (result.finished) {
+          return result;
+        }
       }
+      return { finished: false };
+    } catch (e) {
+      return {
+        finished: true,
+        error: e,
+      };
     }
-    return { finished: false };
   };
 
   /**
@@ -2154,7 +2161,10 @@ export default class DevServer {
       process.stdout.write(data.replace(proxyPort, devPort));
     });
 
-    p.on('exit', () => {
+    p.on('exit', (code: number) => {
+      if (code > 0) {
+        process.exit(code);
+      }
       this.devProcessPort = undefined;
     });
 

packages/cli/src/util/get-update-command.ts

@@ -1,11 +1,9 @@
 import { Stats } from 'fs';
 import { sep, dirname, join, resolve } from 'path';
-import { readJSON, lstat, readlink, readFile, realpath } from 'fs-extra';
+import { lstat, readlink, readFile, realpath } from 'fs-extra';
 import { isCanary } from './is-canary';
 import { getPkgName } from './pkg-name';
 
-// `npm` tacks a bunch of extra properties on the `package.json` file,
-// so check for one of them to determine yarn vs. npm.
 async function isYarn(): Promise<boolean> {
   let s: Stats;
   let binPath = process.argv[1];
@@ -20,8 +18,12 @@ async function isYarn(): Promise<boolean> {
     }
   }
   const pkgPath = join(dirname(binPath), '..', 'package.json');
-  const pkg = await readJSON(pkgPath).catch(() => ({}));
+  /*
-  return !('_id' in pkg);
+   * Generally, pkgPath looks like:
+   * "/Users/username/.config/yarn/global/node_modules/vercel/package.json"
+   * "/usr/local/share/.config/yarn/global/node_modules/vercel/package.json"
+   */
+  return pkgPath.includes(join('yarn', 'global'));
 }
 
 async function getConfigPrefix() {

packages/cli/src/util/metrics.ts

@@ -1,6 +1,5 @@
 import crypto from 'crypto';
 import ua from 'universal-analytics';
-import { platform, release, userInfo } from 'os';
 import { getPlatformEnv } from '@vercel/build-utils';
 
 import userAgent from './ua-browser';
@@ -16,10 +15,15 @@ export const shouldCollectMetrics =
 
 export const metrics = (): ua.Visitor => {
   const token =
-    typeof config.token === 'string' ? config.token : platform() + release();
+    typeof config.token === 'string'
-  const salt = userInfo().username;
+      ? config.token
+      : process.platform + process.arch;
+  const salt =
+    (process.env.USER || '') +
+    (process.env.LANG || '') +
+    (process.env.SHELL || '');
   const hash = crypto
-    .pbkdf2Sync(token, salt, 1000, 64, 'sha512')
+    .pbkdf2Sync(token, salt, 100, 64, 'sha512')
     .toString('hex')
     .substring(0, 24);
 

packages/cli/src/util/output/create-output.ts

@@ -125,10 +125,14 @@ export class Output {
       this.debug(`Spinner invoked (${message}) with a ${delay}ms delay`);
       return;
     }
-    if (this._spinner) {
+    if (this.isTTY) {
-      this._spinner.text = message;
+      if (this._spinner) {
+        this._spinner.text = message;
+      } else {
+        this._spinner = wait(message, delay);
+      }
     } else {
-      this._spinner = wait(message, delay);
+      this.print(`${message}\n`);
     }
   };
 

packages/cli/src/util/projects/link.ts

@@ -244,20 +244,27 @@ export async function linkFolderToProject(
   try {
     const gitIgnorePath = join(path, '.gitignore');
 
-    const gitIgnore = await readFile(gitIgnorePath, 'utf8').catch(() => null);
+    let gitIgnore =
-    const EOL = gitIgnore && gitIgnore.includes('\r\n') ? '\r\n' : os.EOL;
+      (await readFile(gitIgnorePath, 'utf8').catch(() => null)) ?? '';
+    const EOL = gitIgnore.includes('\r\n') ? '\r\n' : os.EOL;
+    let contentModified = false;
 
-    if (
+    if (!gitIgnore.split(EOL).includes(VERCEL_DIR)) {
-      !gitIgnore ||
+      gitIgnore += `${
-      !gitIgnore.split(EOL).includes(VERCEL_DIR) ||
+        gitIgnore.endsWith(EOL) || gitIgnore.length === 0 ? '' : EOL
-      !gitIgnore.split(EOL).includes(VERCEL_OUTPUT_DIR)
+      }${VERCEL_DIR}${EOL}`;
-    ) {
+      contentModified = true;
-      await writeFile(
+    }
-        gitIgnorePath,
+
-        gitIgnore
+    if (!gitIgnore.split(EOL).includes(VERCEL_OUTPUT_DIR)) {
-          ? `${gitIgnore}${EOL}${VERCEL_DIR}${EOL}${VERCEL_OUTPUT_DIR}${EOL}`
+      gitIgnore += `${
-          : `${VERCEL_DIR}${EOL}${VERCEL_OUTPUT_DIR}${EOL}`
+        gitIgnore.endsWith(EOL) || gitIgnore.length === 0 ? '' : EOL
-      );
+      }${VERCEL_OUTPUT_DIR}${EOL}`;
+      contentModified = true;
+    }
+
+    if (contentModified) {
+      await writeFile(gitIgnorePath, gitIgnore);
       isGitIgnoreUpdated = true;
     }
   } catch (error) {

packages/cli/test/fixtures/unit/edge-middleware-invalid-response/_middleware.js

@@ -0,0 +1,3 @@
+export default function () {
+  return 'freecandy';
+}

packages/cli/test/helpers/prepare.js

@@ -19,7 +19,7 @@ const getRevertAliasConfigFile = () => {
     ],
   });
 };
-module.exports = async function prepare(session) {
+module.exports = async function prepare(session, binaryPath) {
   const spec = {
     'static-single-file': {
       'first.png': getImageFile(session, { size: 30 }),
@@ -114,6 +114,23 @@ module.exports = async function prepare(session) {
         2
       ),
     },
+    'dev-fail-on-recursion-command': {
+      'package.json': '{}',
+    },
+    'build-fail-on-recursion-command': {
+      'package.json': '{}',
+    },
+    'build-fail-on-recursion-script': {
+      'package.json': JSON.stringify(
+        {
+          scripts: {
+            build: `${binaryPath} build`,
+          },
+        },
+        null,
+        2
+      ),
+    },
     'static-deployment': {
       'index.txt': 'Hello World',
     },
@@ -348,6 +365,10 @@ module.exports = async function prepare(session) {
     'project-link-dev': {
       'package.json': '{}',
     },
+    'project-link-gitignore': {
+      'package.json': '{}',
+      '.gitignore': '.output',
+    },
     'project-link-legacy': {
       'index.html': 'Hello',
       'vercel.json': '{"builds":[{"src":"*.html","use":"@vercel/static"}]}',

packages/cli/test/integration.js

@@ -252,10 +252,69 @@ const createUser = async () => {
 
 const getConfigAuthPath = () => path.join(globalDir, 'auth.json');
 
+async function setupProject(process, projectName, overrides) {
+  await waitForPrompt(process, chunk => /Set up [^?]+\?/.test(chunk));
+  process.stdin.write('yes\n');
+
+  await waitForPrompt(process, chunk => /Which scope [^?]+\?/.test(chunk));
+  process.stdin.write('\n');
+
+  await waitForPrompt(process, chunk =>
+    chunk.includes('Link to existing project?')
+  );
+  process.stdin.write('no\n');
+
+  await waitForPrompt(process, chunk =>
+    chunk.includes('What’s your project’s name?')
+  );
+  process.stdin.write(`${projectName}\n`);
+
+  await waitForPrompt(process, chunk =>
+    chunk.includes('In which directory is your code located?')
+  );
+  process.stdin.write('\n');
+
+  await waitForPrompt(process, chunk =>
+    chunk.includes('Want to override the settings?')
+  );
+
+  if (overrides) {
+    process.stdin.write('yes\n');
+
+    const { buildCommand, outputDirectory, devCommand } = overrides;
+
+    await waitForPrompt(process, chunk =>
+      chunk.includes(
+        'Which settings would you like to overwrite (select multiple)?'
+      )
+    );
+    process.stdin.write('a\n'); // 'a' means select all
+
+    await waitForPrompt(process, chunk =>
+      chunk.includes(`What's your Build Command?`)
+    );
+    process.stdin.write(`${buildCommand ?? ''}\n`);
+
+    await waitForPrompt(process, chunk =>
+      chunk.includes(`What's your Output Directory?`)
+    );
+    process.stdin.write(`${outputDirectory ?? ''}\n`);
+
+    await waitForPrompt(process, chunk =>
+      chunk.includes(`What's your Development Command?`)
+    );
+    process.stdin.write(`${devCommand ?? ''}\n`);
+  } else {
+    process.stdin.write('no\n');
+  }
+
+  await waitForPrompt(process, chunk => chunk.includes('Linked to'));
+}
+
 test.before(async () => {
   try {
     await createUser();
-    await prepareFixtures(contextName);
+    await prepareFixtures(contextName, binaryPath);
   } catch (err) {
     console.log('Failed `test.before`');
     console.log(err);
@@ -2227,13 +2286,93 @@ test('whoami', async t => {
   t.is(stdout, contextName, formatOutput({ stdout, stderr }));
 });
 
-test('fail `now dev` dev script without now.json', async t => {
+test('[vercel dev] fails when dev script calls vercel dev recursively', async t => {
   const deploymentPath = fixture('now-dev-fail-dev-script');
   const { exitCode, stderr } = await execute(['dev', deploymentPath]);
 
   t.is(exitCode, 1);
   t.true(
-    stderr.includes('must not contain `now dev`'),
+    stderr.includes('must not recursively invoke itself'),
+    `Received instead: "${stderr}"`
+  );
+});
+
+test('[vercel dev] fails when development commad calls vercel dev recursively', async t => {
+  const dir = fixture('dev-fail-on-recursion-command');
+  const projectName = `dev-fail-on-recursion-command-${
+    Math.random().toString(36).split('.')[1]
+  }`;
+
+  const dev = execa(binaryPath, ['dev', ...defaultArgs], {
+    cwd: dir,
+    reject: false,
+  });
+
+  await setupProject(dev, projectName, {
+    devCommand: `${binaryPath} dev`,
+  });
+
+  const { exitCode, stderr } = await dev;
+
+  t.is(exitCode, 1);
+  t.true(
+    stderr.includes('must not recursively invoke itself'),
+    `Received instead: "${stderr}"`
+  );
+});
+
+test('[vercel build] fails when build commad calls vercel build recursively', async t => {
+  const dir = fixture('build-fail-on-recursion-command');
+  const projectName = `build-fail-on-recursion-command-${
+    Math.random().toString(36).split('.')[1]
+  }`;
+
+  const build = execa(binaryPath, ['build', ...defaultArgs], {
+    cwd: dir,
+    reject: false,
+  });
+
+  await waitForPrompt(build, chunk =>
+    chunk.includes('No Project Settings found locally')
+  );
+  build.stdin.write('yes\n');
+
+  await setupProject(build, projectName, {
+    buildCommand: `${binaryPath} build`,
+  });
+
+  const { exitCode, stderr } = await build;
+
+  t.is(exitCode, 1);
+  t.true(
+    stderr.includes('must not recursively invoke itself'),
+    `Received instead: "${stderr}"`
+  );
+});
+
+test('[vercel build] fails when build script calls vercel build recursively', async t => {
+  const dir = fixture('build-fail-on-recursion-script');
+  const projectName = `build-fail-on-recursion-script-${
+    Math.random().toString(36).split('.')[1]
+  }`;
+
+  const build = execa(binaryPath, ['build', ...defaultArgs], {
+    cwd: dir,
+    reject: false,
+  });
+
+  await waitForPrompt(build, chunk =>
+    chunk.includes('No Project Settings found locally')
+  );
+  build.stdin.write('yes\n');
+
+  await setupProject(build, projectName);
+
+  const { exitCode, stderr } = await build;
+
+  t.is(exitCode, 1);
+  t.true(
+    stderr.includes('must not recursively invoke itself'),
     `Received instead: "${stderr}"`
   );
 });
@@ -2544,7 +2683,7 @@ test('deploy a Lambda with 3 seconds of maxDuration', async t => {
   const url = new URL(output.stdout);
 
   // Should time out
-  url.pathname = '/api/wait-for/4';
+  url.pathname = '/api/wait-for/5';
   const response1 = await fetch(url.href);
   t.is(
     response1.status,
@@ -2553,7 +2692,7 @@ test('deploy a Lambda with 3 seconds of maxDuration', async t => {
   );
 
   // Should not time out
-  url.pathname = '/api/wait-for/2';
+  url.pathname = '/api/wait-for/1';
   const response2 = await fetch(url.href);
   t.is(
     response2.status,
@@ -2683,59 +2822,10 @@ test('should show prompts to set up project during first deploy', async t => {
 
   const now = execa(binaryPath, [dir, ...defaultArgs]);
 
-  await waitForPrompt(now, chunk => /Set up and deploy [^?]+\?/.test(chunk));
+  await setupProject(now, projectName, {
-  now.stdin.write('yes\n');
+    buildCommand: `mkdir -p o && echo '<h1>custom hello</h1>' > o/index.html`,
-
+    outputDirectory: 'o',
-  await waitForPrompt(now, chunk =>
+  });
-    chunk.includes('Which scope do you want to deploy to?')
-  );
-  now.stdin.write('\n');
-
-  await waitForPrompt(now, chunk =>
-    chunk.includes('Link to existing project?')
-  );
-  now.stdin.write('no\n');
-
-  await waitForPrompt(now, chunk =>
-    chunk.includes('What’s your project’s name?')
-  );
-  now.stdin.write(`${projectName}\n`);
-
-  await waitForPrompt(now, chunk =>
-    chunk.includes('In which directory is your code located?')
-  );
-  now.stdin.write('\n');
-
-  await waitForPrompt(now, chunk =>
-    chunk.includes('Want to override the settings?')
-  );
-  now.stdin.write('yes\n');
-
-  await waitForPrompt(now, chunk =>
-    chunk.includes(
-      'Which settings would you like to overwrite (select multiple)?'
-    )
-  );
-  now.stdin.write('a\n'); // 'a' means select all
-
-  await waitForPrompt(now, chunk =>
-    chunk.includes(`What's your Build Command?`)
-  );
-  now.stdin.write(
-    `mkdir -p o && echo '<h1>custom hello</h1>' > o/index.html\n`
-  );
-
-  await waitForPrompt(now, chunk =>
-    chunk.includes(`What's your Output Directory?`)
-  );
-  now.stdin.write(`o\n`);
-
-  await waitForPrompt(now, chunk =>
-    chunk.includes(`What's your Development Command?`)
-  );
-  now.stdin.write(`\n`);
-
-  await waitForPrompt(now, chunk => chunk.includes('Linked to'));
 
   const output = await now;
 
@@ -3301,55 +3391,10 @@ test('[vc link] should show prompts to set up project', async t => {
 
   const vc = execa(binaryPath, ['link', ...defaultArgs], { cwd: dir });
 
-  await waitForPrompt(vc, chunk => /Set up [^?]+\?/.test(chunk));
+  await setupProject(vc, projectName, {
-  vc.stdin.write('yes\n');
+    buildCommand: `mkdir -p o && echo '<h1>custom hello</h1>' > o/index.html`,
-
+    outputDirectory: 'o',
-  await waitForPrompt(vc, chunk =>
+  });
-    chunk.includes('Which scope should contain your project?')
-  );
-  vc.stdin.write('\n');
-
-  await waitForPrompt(vc, chunk => chunk.includes('Link to existing project?'));
-  vc.stdin.write('no\n');
-
-  await waitForPrompt(vc, chunk =>
-    chunk.includes('What’s your project’s name?')
-  );
-  vc.stdin.write(`${projectName}\n`);
-
-  await waitForPrompt(vc, chunk =>
-    chunk.includes('In which directory is your code located?')
-  );
-  vc.stdin.write('\n');
-
-  await waitForPrompt(vc, chunk =>
-    chunk.includes('Want to override the settings?')
-  );
-  vc.stdin.write('yes\n');
-
-  await waitForPrompt(vc, chunk =>
-    chunk.includes(
-      'Which settings would you like to overwrite (select multiple)?'
-    )
-  );
-  vc.stdin.write('a\n'); // 'a' means select all
-
-  await waitForPrompt(vc, chunk =>
-    chunk.includes(`What's your Build Command?`)
-  );
-  vc.stdin.write(`mkdir -p o && echo '<h1>custom hello</h1>' > o/index.html\n`);
-
-  await waitForPrompt(vc, chunk =>
-    chunk.includes(`What's your Output Directory?`)
-  );
-  vc.stdin.write(`o\n`);
-
-  await waitForPrompt(vc, chunk =>
-    chunk.includes(`What's your Development Command?`)
-  );
-  vc.stdin.write(`\n`);
-
-  await waitForPrompt(vc, chunk => chunk.includes('Linked to'));
 
   const output = await vc;
 
@@ -3408,6 +3453,29 @@ test('[vc link --confirm] should not show prompts and autolink', async t => {
   );
 });
 
+test('[vc link] should not duplicate paths in .gitignore', async t => {
+  const dir = fixture('project-link-gitignore');
+
+  // remove previously linked project if it exists
+  await remove(path.join(dir, '.vercel'));
+
+  const { exitCode, stderr, stdout } = await execa(
+    binaryPath,
+    ['link', '--confirm', ...defaultArgs],
+    { cwd: dir, reject: false }
+  );
+
+  // Ensure the exit code is right
+  t.is(exitCode, 0, formatOutput({ stderr, stdout }));
+
+  // Ensure the message is correct pattern
+  t.regex(stderr, /Linked to /m);
+
+  // Ensure .gitignore is created
+  const gitignore = await readFile(path.join(dir, '.gitignore'), 'utf8');
+  t.is(gitignore, '.output\n.vercel\n');
+});
+
 test('[vc dev] should show prompts to set up project', async t => {
   const dir = fixture('project-link-dev');
   const port = 58352;
@@ -3422,59 +3490,10 @@ test('[vc dev] should show prompts to set up project', async t => {
     cwd: dir,
   });
 
-  await waitForPrompt(dev, chunk => /Set up and develop [^?]+\?/.test(chunk));
+  await setupProject(dev, projectName, {
-  dev.stdin.write('yes\n');
+    buildCommand: `mkdir -p o && echo '<h1>custom hello</h1>' > o/index.html`,
-
+    outputDirectory: 'o',
-  await waitForPrompt(dev, chunk =>
+  });
-    chunk.includes('Which scope should contain your project?')
-  );
-  dev.stdin.write('\n');
-
-  await waitForPrompt(dev, chunk =>
-    chunk.includes('Link to existing project?')
-  );
-  dev.stdin.write('no\n');
-
-  await waitForPrompt(dev, chunk =>
-    chunk.includes('What’s your project’s name?')
-  );
-  dev.stdin.write(`${projectName}\n`);
-
-  await waitForPrompt(dev, chunk =>
-    chunk.includes('In which directory is your code located?')
-  );
-  dev.stdin.write('\n');
-
-  await waitForPrompt(dev, chunk =>
-    chunk.includes('Want to override the settings?')
-  );
-  dev.stdin.write('yes\n');
-
-  await waitForPrompt(dev, chunk =>
-    chunk.includes(
-      'Which settings would you like to overwrite (select multiple)?'
-    )
-  );
-  dev.stdin.write('a\n'); // 'a' means select all
-
-  await waitForPrompt(dev, chunk =>
-    chunk.includes(`What's your Build Command?`)
-  );
-  dev.stdin.write(
-    `mkdir -p o && echo '<h1>custom hello</h1>' > o/index.html\n`
-  );
-
-  await waitForPrompt(dev, chunk =>
-    chunk.includes(`What's your Output Directory?`)
-  );
-  dev.stdin.write(`o\n`);
-
-  await waitForPrompt(dev, chunk =>
-    chunk.includes(`What's your Development Command?`)
-  );
-  dev.stdin.write(`\n`);
-
-  await waitForPrompt(dev, chunk => chunk.includes('Linked to'));
 
   // Ensure .gitignore is created
   const gitignore = await readFile(path.join(dir, '.gitignore'), 'utf8');
@@ -3574,59 +3593,12 @@ test('[vc dev] should send the platform proxy request headers to frontend dev se
     cwd: dir,
   });
 
-  await waitForPrompt(dev, chunk => /Set up and develop [^?]+\?/.test(chunk));
+  await setupProject(dev, projectName, {
-  dev.stdin.write('yes\n');
+    buildCommand: `mkdir -p o && echo '<h1>custom hello</h1>' > o/index.html`,
+    outputDirectory: 'o',
+    devCommand: 'node server.js',
+  });
 
-  await waitForPrompt(dev, chunk =>
-    chunk.includes('Which scope should contain your project?')
-  );
-  dev.stdin.write('\n');
-
-  await waitForPrompt(dev, chunk =>
-    chunk.includes('Link to existing project?')
-  );
-  dev.stdin.write('no\n');
-
-  await waitForPrompt(dev, chunk =>
-    chunk.includes('What’s your project’s name?')
-  );
-  dev.stdin.write(`${projectName}\n`);
-
-  await waitForPrompt(dev, chunk =>
-    chunk.includes('In which directory is your code located?')
-  );
-  dev.stdin.write('\n');
-
-  await waitForPrompt(dev, chunk =>
-    chunk.includes('Want to override the settings?')
-  );
-  dev.stdin.write('yes\n');
-
-  await waitForPrompt(dev, chunk =>
-    chunk.includes(
-      'Which settings would you like to overwrite (select multiple)?'
-    )
-  );
-  dev.stdin.write('a\n'); // 'a' means select all
-
-  await waitForPrompt(dev, chunk =>
-    chunk.includes(`What's your Build Command?`)
-  );
-  dev.stdin.write(
-    `mkdir -p o && echo '<h1>custom hello</h1>' > o/index.html\n`
-  );
-
-  await waitForPrompt(dev, chunk =>
-    chunk.includes(`What's your Output Directory?`)
-  );
-  dev.stdin.write(`o\n`);
-
-  await waitForPrompt(dev, chunk =>
-    chunk.includes(`What's your Development Command?`)
-  );
-  dev.stdin.write(`node server.js\n`);
-
-  await waitForPrompt(dev, chunk => chunk.includes('Linked to'));
   await waitForPrompt(dev, chunk => chunk.includes('Ready! Available at'));
 
   // Ensure that `vc dev` also works

packages/cli/test/util/dev/server.test.ts

@@ -374,4 +374,15 @@ describe('DevServer', () => {
       );
     })
   );
+
+  it(
+    'should render an error page when the middleware returns not a Response',
+    testFixture('edge-middleware-invalid-response', async server => {
+      const response = await fetch(`${server.address}/index.html`);
+      const body = await response.text();
+      expect(body).toStrictEqual(
+        'A server error has occurred\n\nEDGE_FUNCTION_INVOCATION_FAILED\n'
+      );
+    })
+  );
 });

packages/cli/test/util/get-update-command.test.ts

@@ -5,7 +5,7 @@ describe('getUpdateCommand', () => {
   it('should detect update command', async () => {
     const updateCommand = await getUpdateCommand();
     expect(updateCommand).toEqual(
-      `yarn add vercel@${isCanary() ? 'canary' : 'latest'}`
+      `npm i vercel@${isCanary() ? 'canary' : 'latest'}`
     );
   });
 });

packages/client/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@vercel/client",
-  "version": "10.2.3-canary.18",
+  "version": "10.2.3-canary.21",
   "main": "dist/index.js",
   "typings": "dist/index.d.ts",
   "homepage": "https://vercel.com",
@@ -40,7 +40,7 @@
     ]
   },
   "dependencies": {
-    "@vercel/build-utils": "2.12.3-canary.17",
+    "@vercel/build-utils": "2.12.3-canary.20",
     "@zeit/fetch": "5.2.0",
     "async-retry": "1.2.3",
     "async-sema": "3.0.0",

packages/frameworks/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@vercel/frameworks",
-  "version": "0.5.1-canary.11",
+  "version": "0.5.1-canary.12",
   "main": "./dist/frameworks.js",
   "types": "./dist/frameworks.d.ts",
   "files": [

packages/frameworks/src/frameworks.ts

@@ -43,6 +43,7 @@ export const frameworks = [
       },
       buildCommand: {
         placeholder: '`npm run build` or `blitz build`',
+        value: 'blitz build',
       },
       devCommand: {
         value: 'blitz start',
@@ -51,8 +52,6 @@ export const frameworks = [
         placeholder: 'Next.js default',
       },
     },
-    devCommand: 'blitz start',
-    buildCommand: 'blitz build',
     getFsOutputDir: async () => '.next',
     getOutputDirName: async () => 'public',
   },
@@ -83,6 +82,7 @@ export const frameworks = [
       },
       buildCommand: {
         placeholder: '`npm run build` or `next build`',
+        value: 'next build',
       },
       devCommand: {
         value: 'next dev --port $PORT',
@@ -98,8 +98,6 @@ export const frameworks = [
         dependencies: ['next-plugin-sentry', 'next-sentry-source-maps'],
       },
     ],
-    devCommand: 'next dev --port $PORT',
-    buildCommand: 'next build',
     getFsOutputDir: async () => '.next',
     getOutputDirName: async () => 'public',
     cachePattern: '.next/cache/**',
@@ -131,6 +129,7 @@ export const frameworks = [
       },
       buildCommand: {
         placeholder: '`npm run build` or `gatsby build`',
+        value: 'gatsby build',
       },
       devCommand: {
         value: 'gatsby develop --port $PORT',
@@ -141,8 +140,6 @@ export const frameworks = [
       },
     },
     dependency: 'gatsby',
-    devCommand: 'gatsby develop --port $PORT',
-    buildCommand: 'gatsby build',
     getOutputDirName: async () => 'public',
     getFsOutputDir: async () => 'public',
     defaultRoutes: async (dirPrefix: string) => {
@@ -219,6 +216,7 @@ export const frameworks = [
       },
       buildCommand: {
         placeholder: '`npm run build` or `hexo generate`',
+        value: 'hexo generate',
       },
       devCommand: {
         value: 'hexo server --port $PORT',
@@ -229,8 +227,6 @@ export const frameworks = [
       },
     },
     dependency: 'hexo',
-    devCommand: 'hexo server --port $PORT',
-    buildCommand: 'hexo generate',
     getFsOutputDir: async () => 'public',
     getOutputDirName: async () => 'public',
   },
@@ -259,6 +255,7 @@ export const frameworks = [
       },
       buildCommand: {
         placeholder: '`npm run build` or `npx @11ty/eleventy`',
+        value: 'npx @11ty/eleventy',
       },
       devCommand: {
         value: 'npx @11ty/eleventy --serve --watch --port $PORT',
@@ -269,8 +266,6 @@ export const frameworks = [
       },
     },
     dependency: '@11ty/eleventy',
-    devCommand: 'npx @11ty/eleventy --serve --watch --port $PORT',
-    buildCommand: 'npx @11ty/eleventy',
     getFsOutputDir: async () => '_site',
     getOutputDirName: async () => '_site',
     cachePattern: '.cache/**',
@@ -300,6 +295,7 @@ export const frameworks = [
       },
       buildCommand: {
         placeholder: '`npm run build` or `docusaurus build`',
+        value: 'docusaurus build',
       },
       devCommand: {
         value: 'docusaurus start --port $PORT',
@@ -310,8 +306,6 @@ export const frameworks = [
       },
     },
     dependency: '@docusaurus/core',
-    devCommand: 'docusaurus start --port $PORT',
-    buildCommand: 'docusaurus build',
     getFsOutputDir: async (dirPrefix: string) => {
       const base = 'build';
       try {
@@ -456,6 +450,7 @@ export const frameworks = [
       },
       buildCommand: {
         placeholder: '`npm run build` or `docusaurus-build`',
+        value: 'docusaurus-build',
       },
       devCommand: {
         value: 'docusaurus-start --port $PORT',
@@ -466,8 +461,6 @@ export const frameworks = [
       },
     },
     dependency: 'docusaurus',
-    devCommand: 'docusaurus-start --port $PORT',
-    buildCommand: 'docusaurus-build',
     getFsOutputDir: async (dirPrefix: string) => {
       const base = 'build';
       try {
@@ -523,6 +516,7 @@ export const frameworks = [
       },
       buildCommand: {
         placeholder: '`npm run build` or `preact build`',
+        value: 'preact build',
       },
       devCommand: {
         value: 'preact watch --port $PORT',
@@ -533,8 +527,6 @@ export const frameworks = [
       },
     },
     dependency: 'preact-cli',
-    devCommand: 'preact watch --port $PORT',
-    buildCommand: 'preact build',
     getFsOutputDir: async () => 'build',
     getOutputDirName: async () => 'build',
     defaultRoutes: [
@@ -581,6 +573,7 @@ export const frameworks = [
       },
       buildCommand: {
         placeholder: '`npm run build` or `dojo build`',
+        value: 'dojo build',
       },
       devCommand: {
         value: 'dojo build -m dev -w -s -p $PORT',
@@ -591,8 +584,6 @@ export const frameworks = [
       },
     },
     dependency: '@dojo/cli',
-    devCommand: 'dojo build -m dev -w -s -p $PORT',
-    buildCommand: 'dojo build',
     getFsOutputDir: async () => 'output/dist',
     getOutputDirName: async () => join('output', 'dist'),
     defaultRoutes: [
@@ -649,6 +640,7 @@ export const frameworks = [
       },
       buildCommand: {
         placeholder: '`npm run build` or `ember build`',
+        value: 'ember build',
       },
       devCommand: {
         value: 'ember serve --port $PORT',
@@ -659,8 +651,6 @@ export const frameworks = [
       },
     },
     dependency: 'ember-cli',
-    devCommand: 'ember serve --port $PORT',
-    buildCommand: 'ember build',
     getFsOutputDir: async () => 'dist',
     getOutputDirName: async () => 'dist',
     defaultRoutes: [
@@ -705,6 +695,7 @@ export const frameworks = [
       },
       buildCommand: {
         placeholder: '`npm run build` or `vue-cli-service build`',
+        value: 'vue-cli-service build',
       },
       devCommand: {
         value: 'vue-cli-service serve --port $PORT',
@@ -715,8 +706,6 @@ export const frameworks = [
       },
     },
     dependency: '@vue/cli-service',
-    devCommand: 'vue-cli-service serve --port $PORT',
-    buildCommand: 'vue-cli-service build',
     getFsOutputDir: async () => 'dist',
     getOutputDirName: async () => 'dist',
     defaultRoutes: [
@@ -783,6 +772,7 @@ export const frameworks = [
       },
       buildCommand: {
         placeholder: '`npm run build` or `ng build && scully`',
+        value: 'ng build && scully',
       },
       devCommand: {
         value: 'ng serve --port $PORT',
@@ -793,8 +783,6 @@ export const frameworks = [
       },
     },
     dependency: '@scullyio/init',
-    devCommand: 'ng serve --port $PORT',
-    buildCommand: 'ng build && scully',
     getFsOutputDir: async () => 'dist',
     getOutputDirName: async () => 'dist/static',
   },
@@ -822,6 +810,7 @@ export const frameworks = [
       },
       buildCommand: {
         placeholder: '`npm run build` or `ng build`',
+        value: 'ng build',
       },
       devCommand: {
         value: 'ng serve --port $PORT',
@@ -831,8 +820,6 @@ export const frameworks = [
       },
     },
     dependency: '@ionic/angular',
-    devCommand: 'ng serve --port $PORT',
-    buildCommand: 'ng build',
     getFsOutputDir: async () => 'www',
     getOutputDirName: async () => 'www',
     defaultRoutes: [
@@ -876,6 +863,7 @@ export const frameworks = [
       },
       buildCommand: {
         placeholder: '`npm run build` or `ng build`',
+        value: 'ng build',
       },
       devCommand: {
         value: 'ng serve --port $PORT',
@@ -886,8 +874,6 @@ export const frameworks = [
       },
     },
     dependency: '@angular/cli',
-    devCommand: 'ng serve --port $PORT',
-    buildCommand: 'ng build',
     getFsOutputDir: async () => 'dist',
     getOutputDirName: async (dirPrefix: string) => {
       const base = 'dist';
@@ -945,6 +931,7 @@ export const frameworks = [
       },
       buildCommand: {
         placeholder: '`npm run build` or `polymer build`',
+        value: 'polymer build',
       },
       devCommand: {
         value: 'polymer serve --port $PORT',
@@ -955,8 +942,6 @@ export const frameworks = [
       },
     },
     dependency: 'polymer-cli',
-    devCommand: 'polymer serve --port $PORT',
-    buildCommand: 'polymer build',
     getFsOutputDir: async () => 'build',
     getOutputDirName: async (dirPrefix: string) => {
       const base = 'build';
@@ -1016,6 +1001,7 @@ export const frameworks = [
       },
       buildCommand: {
         placeholder: '`npm run build` or `rollup -c`',
+        value: 'rollup -c',
       },
       devCommand: {
         value: 'rollup -c -w',
@@ -1025,8 +1011,6 @@ export const frameworks = [
       },
     },
     dependency: 'sirv-cli',
-    devCommand: 'rollup -c -w',
-    buildCommand: 'rollup -c',
     getFsOutputDir: async () => 'public',
     getOutputDirName: async () => 'public',
     defaultRoutes: [
@@ -1070,6 +1054,7 @@ export const frameworks = [
       },
       buildCommand: {
         placeholder: '`npm run build` or `svelte-kit build`',
+        value: 'svelte-kit build',
       },
       devCommand: {
         value: 'svelte-kit dev --port $PORT',
@@ -1079,8 +1064,6 @@ export const frameworks = [
         placeholder: 'public',
       },
     },
-    devCommand: 'svelte-kit dev --port $PORT',
-    buildCommand: 'svelte-kit build',
     getFsOutputDir: async () => '.output',
     getOutputDirName: async () => 'public',
   },
@@ -1108,6 +1091,7 @@ export const frameworks = [
       },
       buildCommand: {
         placeholder: '`npm run build` or `react-scripts build`',
+        value: 'react-scripts build',
       },
       devCommand: {
         value: 'react-scripts start',
@@ -1117,8 +1101,6 @@ export const frameworks = [
       },
     },
     dependency: '@ionic/react',
-    devCommand: 'react-scripts start',
-    buildCommand: 'react-scripts build',
     getFsOutputDir: async () => 'build',
     getOutputDirName: async () => 'build',
     defaultRoutes: [
@@ -1216,6 +1198,7 @@ export const frameworks = [
       },
       buildCommand: {
         placeholder: '`npm run build` or `react-scripts build`',
+        value: 'react-scripts build',
       },
       devCommand: {
         value: 'react-scripts start',
@@ -1225,8 +1208,6 @@ export const frameworks = [
       },
     },
     dependency: 'react-scripts',
-    devCommand: 'react-scripts start',
-    buildCommand: 'react-scripts build',
     getFsOutputDir: async () => 'build',
     getOutputDirName: async () => 'build',
     defaultRoutes: [
@@ -1318,6 +1299,7 @@ export const frameworks = [
       },
       buildCommand: {
         placeholder: '`npm run build` or `gridsome build`',
+        value: 'gridsome build',
       },
       devCommand: {
         value: 'gridsome develop -p $PORT',
@@ -1328,8 +1310,6 @@ export const frameworks = [
       },
     },
     dependency: 'gridsome',
-    devCommand: 'gridsome develop -p $PORT',
-    buildCommand: 'gridsome build',
     getFsOutputDir: async () => 'dist',
     getOutputDirName: async () => 'dist',
   },
@@ -1357,6 +1337,7 @@ export const frameworks = [
       },
       buildCommand: {
         placeholder: '`npm run build` or `umi build`',
+        value: 'umi build',
       },
       devCommand: {
         value: 'umi dev --port $PORT',
@@ -1367,8 +1348,6 @@ export const frameworks = [
       },
     },
     dependency: 'umi',
-    devCommand: 'umi dev --port $PORT',
-    buildCommand: 'umi build',
     getFsOutputDir: async () => 'dist',
     getOutputDirName: async () => 'dist',
     defaultRoutes: [
@@ -1412,6 +1391,7 @@ export const frameworks = [
       },
       buildCommand: {
         placeholder: '`npm run build` or `sapper export`',
+        value: 'sapper export',
       },
       devCommand: {
         value: 'sapper dev --port $PORT',
@@ -1422,8 +1402,6 @@ export const frameworks = [
       },
     },
     dependency: 'sapper',
-    devCommand: 'sapper dev --port $PORT',
-    buildCommand: 'sapper export',
     getFsOutputDir: async () => '__sapper__/export',
     getOutputDirName: async () => '__sapper__/export',
   },
@@ -1451,6 +1429,7 @@ export const frameworks = [
       },
       buildCommand: {
         placeholder: '`npm run build` or `saber build`',
+        value: 'saber build',
       },
       devCommand: {
         value: 'saber --port $PORT',
@@ -1461,8 +1440,6 @@ export const frameworks = [
       },
     },
     dependency: 'saber',
-    devCommand: 'saber --port $PORT',
-    buildCommand: 'saber build',
     getFsOutputDir: async () => 'public',
     getOutputDirName: async () => 'public',
     defaultRoutes: [
@@ -1521,6 +1498,7 @@ export const frameworks = [
       },
       buildCommand: {
         placeholder: '`npm run build` or `stencil build`',
+        value: 'stencil build',
       },
       devCommand: {
         value: 'stencil build --dev --watch --serve --port $PORT',
@@ -1531,8 +1509,6 @@ export const frameworks = [
       },
     },
     dependency: '@stencil/core',
-    devCommand: 'stencil build --dev --watch --serve --port $PORT',
-    buildCommand: 'stencil build',
     getFsOutputDir: async () => 'www',
     getOutputDirName: async () => 'www',
     defaultRoutes: [
@@ -1611,6 +1587,7 @@ export const frameworks = [
       },
       buildCommand: {
         placeholder: '`npm run build` or `nuxt generate`',
+        value: 'nuxt generate',
       },
       devCommand: {
         value: 'nuxt',
@@ -1620,8 +1597,6 @@ export const frameworks = [
       },
     },
     dependency: 'nuxt',
-    devCommand: 'nuxt',
-    buildCommand: 'nuxt generate',
     getFsOutputDir: async () => '.output',
     getOutputDirName: async () => 'dist',
     cachePattern: '.nuxt/**',
@@ -1680,8 +1655,6 @@ export const frameworks = [
         placeholder: 'RedwoodJS default',
       },
     },
-    devCommand: 'yarn rw dev --fwd="--port=$PORT --open=false',
-    buildCommand: 'yarn rw deploy vercel',
     getFsOutputDir: async () => 'public',
     getOutputDirName: async () => 'public',
   },
@@ -1717,6 +1690,7 @@ export const frameworks = [
       },
       buildCommand: {
         placeholder: '`npm run build` or `hugo -D --gc`',
+        value: 'hugo -D --gc',
       },
       devCommand: {
         value: 'hugo server -D -w -p $PORT',
@@ -1726,8 +1700,6 @@ export const frameworks = [
         placeholder: '`public` or `publishDir` from the `config` file',
       },
     },
-    devCommand: 'hugo server -D -w -p $PORT',
-    buildCommand: 'hugo -D --gc',
     getFsOutputDir: async (dirPrefix: string): Promise<string> => {
       type HugoConfig = { publishDir?: string };
       const config = await readConfigFile<HugoConfig>(
@@ -1772,6 +1744,7 @@ export const frameworks = [
       },
       buildCommand: {
         placeholder: '`npm run build` or `jekyll build`',
+        value: 'jekyll build',
       },
       devCommand: {
         value: 'bundle exec jekyll serve --watch --port $PORT',
@@ -1781,8 +1754,6 @@ export const frameworks = [
         placeholder: '`_site` or `destination` from `_config.yml`',
       },
     },
-    devCommand: 'bundle exec jekyll serve --watch --port $PORT',
-    buildCommand: 'jekyll build',
     getFsOutputDir: async (dirPrefix: string): Promise<string> => {
       type JekyllConfig = { destination?: string };
       const config = await readConfigFile<JekyllConfig>(
@@ -1821,6 +1792,7 @@ export const frameworks = [
       },
       buildCommand: {
         placeholder: '`npm run build` or `brunch build --production`',
+        value: 'brunch build --production',
       },
       devCommand: {
         value: 'brunch watch --server --port $PORT',
@@ -1830,8 +1802,6 @@ export const frameworks = [
         value: 'public',
       },
     },
-    devCommand: 'brunch watch --server --port $PORT',
-    buildCommand: 'brunch build --production',
     getFsOutputDir: async () => 'public',
     getOutputDirName: async () => 'public',
   },
@@ -1856,18 +1826,17 @@ export const frameworks = [
         value: 'bundle install',
       },
       buildCommand: {
-        value: '`npm run build` or `bundle exec middleman build`',
+        placeholder: '`npm run build` or `bundle exec middleman build`',
+        value: 'bundle exec middleman build',
       },
       devCommand: {
-        value: 'bundle exec middleman server -p $PORT',
         placeholder: 'bundle exec middleman server',
+        value: 'bundle exec middleman server -p $PORT',
       },
       outputDirectory: {
         value: 'build',
       },
     },
-    devCommand: 'bundle exec middleman server -p $PORT',
-    buildCommand: 'bundle exec middleman build',
     getFsOutputDir: async () => 'build',
     getOutputDirName: async () => 'build',
     cachePattern: '{vendor/bin,vendor/cache,vendor/bundle}/**',
@@ -1896,15 +1865,13 @@ export const frameworks = [
         value: 'zola build',
       },
       devCommand: {
-        value: 'zola serve --port $PORT',
         placeholder: 'zola serve',
+        value: 'zola serve --port $PORT',
       },
       outputDirectory: {
         value: 'public',
       },
     },
-    devCommand: 'zola serve --port $PORT',
-    buildCommand: 'zola build',
     getFsOutputDir: async () => 'public',
     getOutputDirName: async () => 'public',
     defaultVersion: '0.13.0',
@@ -1934,17 +1901,17 @@ export const frameworks = [
       },
       buildCommand: {
         placeholder: '`npm run build` or `vite build`',
+        value: 'vite build',
       },
       devCommand: {
         placeholder: 'vite',
+        value: 'vite',
       },
       outputDirectory: {
         value: 'dist',
       },
     },
     dependency: 'vite',
-    devCommand: 'vite',
-    buildCommand: 'vite build',
     getFsOutputDir: async () => 'dist',
     getOutputDirName: async () => 'dist',
   },
@@ -1972,17 +1939,17 @@ export const frameworks = [
       },
       buildCommand: {
         placeholder: '`npm run build` or `parcel build`',
+        value: 'parcel build',
       },
       devCommand: {
         placeholder: 'parcel',
+        value: 'parcel',
       },
       outputDirectory: {
-        placeholder: 'dist',
+        value: 'dist',
       },
     },
     dependency: 'parcel',
-    devCommand: 'parcel',
-    buildCommand: 'parcel build',
     getFsOutputDir: async () => 'dist',
     getOutputDirName: async () => 'dist',
     defaultRoutes: [
@@ -2016,16 +1983,16 @@ export const frameworks = [
       },
       buildCommand: {
         placeholder: '`npm run vercel-build` or `npm run build`',
+        value: null,
       },
       devCommand: {
         placeholder: 'None',
+        value: null,
       },
       outputDirectory: {
         placeholder: '`public` if it exists, or `.`',
       },
     },
-    devCommand: null,
-    buildCommand: null,
     getFsOutputDir: async (dirPrefix: string): Promise<string> => {
       // Public if it exists or `.`
       let base = 'public';

packages/frameworks/src/types.ts

@@ -26,7 +26,7 @@ export interface SettingValue {
    * A predefined setting for the detected framework
    * @example "next dev --port $PORT"
    */
-  value: string;
+  value: string | null;
   placeholder?: string;
 }
 
@@ -129,11 +129,11 @@ export interface Framework {
     /**
      * Default Build Command or a placeholder
      */
-    buildCommand: Setting;
+    buildCommand: SettingValue;
     /**
      * Default Development Command or a placeholder
      */
-    devCommand: Setting;
+    devCommand: SettingValue;
     /**
      * Default Output Directory
      */
@@ -157,6 +157,7 @@ export interface Framework {
   /**
    * Name of a dependency in `package.json` to detect this framework.
    * @example "hexo"
+   * @deprecated use `detectors` instead (new frameworks should not use this prop)
    */
   dependency?: string;
   /**
@@ -201,16 +202,6 @@ export interface Framework {
    * @example ".cache/**"
    */
   cachePattern?: string;
-  /**
-   * The default build command for the framework.
-   * @example "next build"
-   */
-  buildCommand: string | null;
-  /**
-   * The default development command for the framework.
-   * @example "next dev"
-   */
-  devCommand: string | null;
   /**
    * The default version of the framework command that is available within the
    * build image. Usually an environment variable can be set to override this.

packages/frameworks/test/frameworks.unit.test.ts

@@ -34,7 +34,7 @@ const SchemaSettings = {
       additionalProperties: false,
       properties: {
         value: {
-          type: 'string',
+          type: ['string', 'null'],
         },
         placeholder: {
           type: 'string',
@@ -58,15 +58,7 @@ const Schema = {
   type: 'array',
   items: {
     type: 'object',
-    required: [
+    required: ['name', 'slug', 'logo', 'description', 'settings'],
-      'name',
-      'slug',
-      'logo',
-      'description',
-      'settings',
-      'buildCommand',
-      'devCommand',
-    ],
     properties: {
       name: { type: 'string' },
       slug: { type: ['string', 'null'] },
@@ -138,8 +130,6 @@ const Schema = {
 
       dependency: { type: 'string' },
       cachePattern: { type: 'string' },
-      buildCommand: { type: ['string', 'null'] },
-      devCommand: { type: ['string', 'null'] },
       defaultVersion: { type: 'string' },
     },
   },

packages/go/go-helpers.ts

@@ -6,7 +6,8 @@ import { join } from 'path';
 import stringArgv from 'string-argv';
 import { debug } from '@vercel/build-utils';
 const versionMap = new Map([
-  ['1.16', '1.16'],
+  ['1.17', '1.17.3'],
+  ['1.16', '1.16.10'],
   ['1.15', '1.15.8'],
   ['1.14', '1.14.15'],
   ['1.13', '1.13.15'],

packages/go/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@vercel/go",
-  "version": "1.2.4-canary.3",
+  "version": "1.2.4-canary.4",
   "license": "MIT",
   "main": "./dist/index",
   "homepage": "https://vercel.com/docs/runtimes#official-runtimes/go",

packages/go/test/fixtures/01-cowsay/vercel.json

@@ -5,10 +5,10 @@
     { "src": "subdirectory/index.go", "use": "@vercel/go" }
   ],
   "probes": [
-    { "path": "/", "mustContain": "cow:go1.16:RANDOMNESS_PLACEHOLDER" },
+    { "path": "/", "mustContain": "cow:go1.17.3:RANDOMNESS_PLACEHOLDER" },
     {
       "path": "/subdirectory",
-      "mustContain": "subcow:go1.16:RANDOMNESS_PLACEHOLDER"
+      "mustContain": "subcow:go1.17.3:RANDOMNESS_PLACEHOLDER"
     }
   ]
 }

packages/go/test/fixtures/13-go-mod-nested/go.mod

@@ -1,3 +1,3 @@
 module with-nested
 
-go 1.12
+go 1.16

packages/middleware/package.json

@@ -1,6 +1,6 @@
 {
   "name": "vercel-plugin-middleware",
-  "version": "0.0.0-canary.6",
+  "version": "0.0.0-canary.7",
   "license": "MIT",
   "main": "./dist/index",
   "homepage": "",

packages/middleware/src/entries.js

@@ -3,13 +3,16 @@ _ENTRIES = typeof _ENTRIES === 'undefined' ? {} : _ENTRIES;
 _ENTRIES['middleware_pages/_middleware'] = {
   default: async function (ev) {
     const result = await middleware.default(ev.request, ev);
-    if (result instanceof Response) {
+    return {
-      return {
+      promise: Promise.resolve(),
-        promise: Promise.resolve(),
+      waitUntil: Promise.resolve(),
-        waitUntil: Promise.resolve(),
+      response:
-        response: result,
+        result ||
-      };
+        new Response(null, {
-    }
+          headers: {
-    return result;
+            'x-middleware-next': 1,
+          },
+        }),
+    };
   },
 };

packages/middleware/test/build.test.ts

@@ -1,8 +1,19 @@
 import { join } from 'path';
 import { promises as fsp } from 'fs';
 import { build } from '../src';
+import { Response } from 'node-fetch';
 
 describe('build()', () => {
+  beforeEach(() => {
+    //@ts-ignore
+    global.Response = Response;
+  });
+  afterEach(() => {
+    //@ts-ignore
+    delete global.Response;
+    //@ts-ignore
+    delete global._ENTRIES;
+  });
   it('should build simple middleware', async () => {
     const fixture = join(__dirname, 'fixtures/simple');
     await build({
@@ -17,8 +28,30 @@ describe('build()', () => {
     );
     expect(middlewareManifest).toMatchSnapshot();
 
+    const outputFile = join(fixture, '.output/server/pages/_middleware.js');
+    expect(await fsp.stat(outputFile)).toBeTruthy();
+
+    require(outputFile);
+    //@ts-ignore
+    const middleware = global._ENTRIES['middleware_pages/_middleware'].default;
+    expect(typeof middleware).toStrictEqual('function');
+    const handledResponse = await middleware({
+      request: {
+        url: 'http://google.com',
+      },
+    });
+    const unhandledResponse = await middleware({
+      request: {
+        url: 'literallyanythingelse',
+      },
+    });
+    expect(String(handledResponse.response.body)).toEqual('Hi from the edge!');
     expect(
-      await fsp.stat(join(fixture, '.output/server/pages/_middleware.js'))
+      (handledResponse.response as Response).headers.get('x-middleware-next')
-    ).toBeTruthy();
+    ).toEqual(null);
+    expect(unhandledResponse.response.body).toEqual(null);
+    expect(
+      (unhandledResponse.response as Response).headers.get('x-middleware-next')
+    ).toEqual('1');
   });
 });

packages/middleware/test/fixtures/simple/_middleware.js

@@ -1 +1,5 @@
-export default () => new Response('Hi from the edge!');
+export default req => {
+  if (req.url === 'http://google.com') {
+    return new Response('Hi from the edge!');
+  }
+};

packages/node/build.js

@@ -33,14 +33,6 @@ async function main() {
   await fs.remove(symlinkTarget);
   await fs.symlink('symlinked-asset', symlinkTarget);
 
-  // Use types.d.ts as the main types export
-  await Promise.all(
-    (await fs.readdir(outDir))
-      .filter(p => p.endsWith('.d.ts') && p !== 'types.d.ts')
-      .map(p => fs.remove(join(outDir, p)))
-  );
-  await fs.rename(join(outDir, 'types.d.ts'), join(outDir, 'index.d.ts'));
-
   // Bundle helpers.ts with ncc
   await fs.remove(join(outDir, 'helpers.js'));
   const helpersDir = join(outDir, 'helpers');

packages/node/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@vercel/node",
-  "version": "1.12.2-canary.6",
+  "version": "1.12.2-canary.7",
   "license": "MIT",
   "main": "./dist/index",
   "homepage": "https://vercel.com/docs/runtimes#official-runtimes/node-js",

packages/node/src/index.ts

@@ -339,6 +339,9 @@ function getAWSLambdaHandler(entrypoint: string, config: Config) {
   return '';
 }
 
+// Ensures that everything from `types.ts` is exported in the final `index.d.ts` file.
+export * from './types';
+
 export const version = 3;
 
 export async function build({

packages/plugin-go/package.json

@@ -1,7 +1,7 @@
 {
   "private": false,
   "name": "vercel-plugin-go",
-  "version": "1.0.0-canary.1",
+  "version": "1.0.0-canary.5",
   "main": "dist/index.js",
   "license": "MIT",
   "files": [
@@ -17,8 +17,8 @@
     "prepublishOnly": "tsc"
   },
   "dependencies": {
-    "@vercel/build-utils": "2.12.3-canary.17",
+    "@vercel/build-utils": "2.12.3-canary.20",
-    "@vercel/go": "1.2.4-canary.3"
+    "@vercel/go": "1.2.4-canary.4"
   },
   "devDependencies": {
     "@types/node": "*",

packages/plugin-node/package.json

@@ -1,6 +1,6 @@
 {
   "name": "vercel-plugin-node",
-  "version": "1.12.2-canary.7",
+  "version": "1.12.2-canary.11",
   "license": "MIT",
   "main": "./dist/index",
   "homepage": "https://vercel.com/docs/runtimes#official-runtimes/node-js",
@@ -33,7 +33,9 @@
     "@types/jest": "27.0.2",
     "@types/node-fetch": "2",
     "@types/test-listen": "1.1.0",
-    "@vercel/fun": "1.0.1",
+    "@types/yazl": "2.4.2",
+    "@vercel/build-utils": "2.12.3-canary.20",
+    "@vercel/fun": "1.0.3",
     "@vercel/ncc": "0.24.0",
     "@vercel/nft": "0.14.0",
     "@vercel/node-bridge": "2.1.1-canary.2",
@@ -46,7 +48,8 @@
     "node-fetch": "2",
     "source-map-support": "0.5.12",
     "test-listen": "1.1.0",
-    "ts-morph": "12.0.0"
+    "ts-morph": "12.0.0",
+    "yazl": "2.5.1"
   },
   "jest": {
     "preset": "ts-jest",

packages/plugin-node/src/index.ts

@@ -35,7 +35,11 @@ import {
   debug,
   isSymbolicLink,
   runNpmInstall,
+  updateFunctionsManifest,
+  updateRoutesManifest,
   walkParentDirs,
+  normalizePath,
+  runPackageJsonScript,
 } from '@vercel/build-utils';
 import { FromSchema } from 'json-schema-to-ts';
 import { getConfig, BaseFunctionConfigSchema } from '@vercel/static-config';
@@ -43,6 +47,7 @@ import { AbortController } from 'abort-controller';
 import { Register, register } from './typescript';
 import { pageToRoute } from './router/page-to-route';
 import { isDynamicRoute } from './router/is-dynamic';
+import crypto from 'crypto';
 
 export { shouldServe };
 export {
@@ -64,6 +69,7 @@ const { makeVercelLauncher, makeAwsLauncher } = require_(
 interface DownloadOptions {
   entrypoint: string;
   workPath: string;
+  installedPaths?: Set<string>;
 }
 
 interface PortInfo {
@@ -109,17 +115,47 @@ const BRIDGE_FILENAME = '__bridge.js';
 const HELPERS_FILENAME = '__helpers.js';
 const SOURCEMAP_SUPPORT_FILENAME = '__sourcemap_support.js';
 
-async function downloadInstallAndBundle({
+async function maybeInstallAndBuild({
   entrypoint,
   workPath,
+  installedPaths,
 }: DownloadOptions) {
   const entrypointFsDirname = join(workPath, dirname(entrypoint));
   const nodeVersion = await getNodeVersion(entrypointFsDirname);
   const spawnOpts = getSpawnOptions({}, nodeVersion);
 
-  const installTime = Date.now();
+  const lastPath = await walkParentDirs({
-  await runNpmInstall(entrypointFsDirname, [], spawnOpts, {}, nodeVersion);
+    base: workPath,
-  debug(`Install complete [${Date.now() - installTime}ms]`);
+    start: entrypointFsDirname,
+    filename: 'package.json',
+  });
+
+  if (!lastPath || dirname(lastPath) === workPath) {
+    debug(`Skip install command in \`vercel-plugin-node\` for ${entrypoint}.`);
+  } else if (lastPath) {
+    if (!installedPaths?.has(lastPath)) {
+      installedPaths?.add(lastPath);
+      const installTime = Date.now();
+      await runNpmInstall(dirname(lastPath), [], spawnOpts, {}, nodeVersion);
+      debug(
+        `Install complete [${Date.now() - installTime}ms] for ${relative(
+          workPath,
+          lastPath
+        )}`
+      );
+
+      await runPackageJsonScript(
+        dirname(lastPath),
+        // Don't consider "build" script since its intended for frontend code
+        ['vercel-build', 'now-build'],
+        spawnOpts
+      );
+    } else {
+      debug(
+        `Skip install command in \`vercel-plugin-node\` for ${entrypoint}. Already installed for other entrypoint.`
+      );
+    }
+  }
 
   return {
     nodeVersion,
@@ -346,6 +382,7 @@ function getAWSLambdaHandler(entrypoint: string, config: FunctionConfig) {
 export async function build({ workPath }: { workPath: string }) {
   const project = new Project();
   const entrypoints = await glob('api/**/*.[jt]s', workPath);
+  const installedPaths = new Set<string>();
   for (const entrypoint of Object.keys(entrypoints)) {
     // Dotfiles are not compiled
     if (entrypoint.includes('/.')) continue;
@@ -370,7 +407,7 @@ export async function build({ workPath }: { workPath: string }) {
       continue;
     }
 
-    await buildEntrypoint({ workPath, entrypoint, config });
+    await buildEntrypoint({ workPath, entrypoint, config, installedPaths });
   }
 }
 
@@ -378,46 +415,43 @@ export async function buildEntrypoint({
   workPath,
   entrypoint,
   config,
+  installedPaths,
 }: {
   workPath: string;
   entrypoint: string;
   config: FunctionConfig;
+  installedPaths?: Set<string>;
 }) {
+  // Unique hash that will be used as directory name for `.output`.
+  const entrypointHash = crypto
+    .createHash('sha256')
+    .update(entrypoint)
+    .digest('hex');
   const outputDirPath = join(workPath, '.output');
+
   const { dir, name } = parsePath(entrypoint);
   const entrypointWithoutExt = join('/', dir, name);
-  const entrypointWithoutExtIndex = join(
+  const outputWorkPath = join(outputDirPath, 'inputs', entrypointHash);
-    dir,
+  const pagesDir = join(outputDirPath, 'server', 'pages');
-    name,
+  const pageOutput = join(pagesDir, renameTStoJS(entrypoint));
-    name === 'index' ? '' : 'index'
+  const nftOutput = `${pageOutput}.nft.json`;
-  );
+
-  const outputWorkPath = join(
-    outputDirPath,
-    'server/pages',
-    entrypointWithoutExtIndex
-  );
   await fsp.mkdir(outputWorkPath, { recursive: true });
+  await fsp.mkdir(parsePath(pageOutput).dir, { recursive: true });
+
   console.log(`Compiling "${entrypoint}" to "${outputWorkPath}"`);
 
   const shouldAddHelpers =
     config.helpers !== false && process.env.NODEJS_HELPERS !== '0';
   const awsLambdaHandler = getAWSLambdaHandler(entrypoint, config);
 
-  const { nodeVersion } = await downloadInstallAndBundle({
+  const { nodeVersion } = await maybeInstallAndBuild({
     entrypoint,
     workPath,
+    installedPaths,
   });
   const entrypointPath = join(workPath, entrypoint);
 
-  // TODO NATE: do we want to run the build script?
-  // The frontend build command probably already did this
-  //await runPackageJsonScript(
-  //  entrypointFsDirname,
-  //  // Don't consider "build" script since its intended for frontend code
-  //  ['vercel-build', 'now-build'],
-  //  spawnOpts
-  //);
-
   debug('Tracing input files...');
   const traceTime = Date.now();
   const { preparedFiles, shouldAddSourcemapSupport } = await compile(
@@ -427,11 +461,12 @@ export async function buildEntrypoint({
   );
   debug(`Trace complete [${Date.now() - traceTime}ms]`);
 
-  const getFileName = (str: string) => `___vc/${str}`;
+  // Has to be in `dirname(entrypoint)` because the `handler` will be prefixed with this path.
+  const getVCFileName = (str: string) => `${dirname(entrypoint)}/___vc/${str}`;
 
   const launcher = awsLambdaHandler ? makeAwsLauncher : makeVercelLauncher;
   const launcherSource = launcher({
-    entrypointPath: `../${renameTStoJS(relative(workPath, entrypointPath))}`,
+    entrypointPath: `../${renameTStoJS(basename(entrypoint))}`,
     bridgePath: `./${BRIDGE_FILENAME}`,
     helpersPath: `./${HELPERS_FILENAME}`,
     sourcemapSupportPath: `./${SOURCEMAP_SUPPORT_FILENAME}`,
@@ -441,25 +476,25 @@ export async function buildEntrypoint({
   });
 
   const launcherFiles: Files = {
-    [getFileName('package.json')]: new FileBlob({
+    [getVCFileName('package.json')]: new FileBlob({
       data: JSON.stringify({ type: 'commonjs' }),
     }),
-    [getFileName(LAUNCHER_FILENAME)]: new FileBlob({
+    [getVCFileName(LAUNCHER_FILENAME)]: new FileBlob({
       data: launcherSource,
     }),
-    [getFileName(BRIDGE_FILENAME)]: new FileFsRef({
+    [getVCFileName(BRIDGE_FILENAME)]: new FileFsRef({
       fsPath: join(DIST_DIR, 'bridge.js'),
     }),
   };
 
   if (shouldAddSourcemapSupport) {
-    launcherFiles[getFileName(SOURCEMAP_SUPPORT_FILENAME)] = new FileFsRef({
+    launcherFiles[getVCFileName(SOURCEMAP_SUPPORT_FILENAME)] = new FileFsRef({
       fsPath: join(DIST_DIR, 'source-map-support.js'),
     });
   }
 
   if (shouldAddHelpers) {
-    launcherFiles[getFileName(HELPERS_FILENAME)] = new FileFsRef({
+    launcherFiles[getVCFileName(HELPERS_FILENAME)] = new FileFsRef({
       fsPath: join(DIST_DIR, 'helpers.js'),
     });
   }
@@ -470,6 +505,8 @@ export async function buildEntrypoint({
     ...launcherFiles,
   };
 
+  const nftFiles: { input: string; output: string }[] = [];
+
   for (const filename of Object.keys(files)) {
     const outPath = join(outputWorkPath, filename);
     const file = files[filename];
@@ -480,48 +517,44 @@ export async function buildEntrypoint({
     const finishPromise = once(ws, 'finish');
     file.toStream().pipe(ws);
     await finishPromise;
+
+    // The `handler` will be `.output/server/pages/api/subdirectory/___vc/__launcher.launcher`
+    // or `.output/server/pages/api/___vc/__launcher.launcher`.
+    // This means everything has to be mounted to the `dirname` of the entrypoint.
+    nftFiles.push({
+      input: relative(dirname(nftOutput), outPath),
+      output: join('.output', 'server', 'pages', filename),
+    });
   }
 
-  // Update the `functions-mainifest.json` file with this entrypoint
-  // TODO NATE: turn this into a `@vercel/plugin-utils` helper function?
-  const functionsManifestPath = join(outputDirPath, 'functions-manifest.json');
-  let functionsManifest: any = {};
-  try {
-    functionsManifest = JSON.parse(
-      await fsp.readFile(functionsManifestPath, 'utf8')
-    );
-  } catch (_err) {
-    // ignore...
-  }
-  if (!functionsManifest.version) functionsManifest.version = 1;
-  if (!functionsManifest.pages) functionsManifest.pages = {};
-  functionsManifest.pages[entrypointWithoutExtIndex] = {
-    handler: `${getFileName(LAUNCHER_FILENAME).slice(0, -3)}.launcher`,
-    runtime: nodeVersion.runtime,
-  };
   await fsp.writeFile(
-    functionsManifestPath,
+    nftOutput,
-    JSON.stringify(functionsManifest, null, 2)
+    JSON.stringify({
+      version: 1,
+      files: nftFiles,
+    })
   );
 
+  await fsp.copyFile(
+    join(outputWorkPath, renameTStoJS(entrypoint)),
+    pageOutput
+  );
+
+  const pages = {
+    [normalizePath(relative(pagesDir, pageOutput))]: {
+      handler: `___vc/${LAUNCHER_FILENAME.slice(0, -3)}.launcher`,
+      runtime: nodeVersion.runtime,
+    },
+  };
+  await updateFunctionsManifest({ workPath, pages });
+
   // Update the `routes-mainifest.json` file with the wildcard route
   // when the entrypoint is dynamic (i.e. `/api/[id].ts`).
   if (isDynamicRoute(entrypointWithoutExt)) {
-    const routesManifestPath = join(outputDirPath, 'routes-manifest.json');
+    await updateRoutesManifest({
-    let routesManifest: any = {};
+      workPath,
-    try {
+      dynamicRoutes: [pageToRoute(entrypointWithoutExt)],
-      routesManifest = JSON.parse(
+    });
-        await fsp.readFile(routesManifestPath, 'utf8')
-      );
-    } catch (_err) {
-      // ignore...
-    }
-    if (!routesManifest.dynamicRoutes) routesManifest.dynamicRoutes = [];
-    routesManifest.dynamicRoutes.push(pageToRoute(entrypointWithoutExt));
-    await fsp.writeFile(
-      routesManifestPath,
-      JSON.stringify(routesManifest, null, 2)
-    );
   }
 }
 

packages/plugin-node/test/build.test.ts

@@ -1,6 +1,7 @@
-import { join } from 'path';
+import path from 'path';
 import { parse } from 'url';
 import { promises as fsp } from 'fs';
+import { ZipFile } from 'yazl';
 import { createFunction, Lambda } from '@vercel/fun';
 import {
   Request,
@@ -11,6 +12,7 @@ import {
   Headers,
 } from 'node-fetch';
 import { build } from '../src';
+import { runNpmInstall, streamToBuffer } from '@vercel/build-utils';
 
 interface TestParams {
   fixture: string;
@@ -50,40 +52,66 @@ function withFixture<T>(
   t: (props: TestParams) => Promise<T>
 ): () => Promise<T> {
   return async () => {
-    const fixture = join(__dirname, 'fixtures', name);
+    const fixture = path.join(__dirname, 'fixtures', name);
+    await fsp.rmdir(path.join(fixture, '.output'), { recursive: true });
+
     const functions = new Map<string, Lambda>();
 
     async function fetch(r: RequestInfo, init?: RequestInit) {
       const req = new Request(r, init);
       const url = parse(req.url);
-      const pathWithIndex = join(
+      const functionPath = url.pathname!.substring(1);
-        url.pathname!,
-        url.pathname!.endsWith('/index') ? '' : 'index'
-      ).substring(1);
 
       let status = 404;
       let headers: HeadersInit = {};
       let body: string | Buffer = 'Function not found';
 
-      let fn = functions.get(pathWithIndex);
+      let fn = functions.get(functionPath);
       if (!fn) {
         const manifest = JSON.parse(
           await fsp.readFile(
-            join(fixture, '.output/functions-manifest.json'),
+            path.join(fixture, '.output/functions-manifest.json'),
             'utf8'
           )
         );
-        const functionManifest = manifest.pages[pathWithIndex];
+
+        const keyFile = `${functionPath}.js`;
+        const keyIndex = `${functionPath}/index.js`;
+        const fnKey = keyFile in manifest.pages ? keyFile : keyIndex;
+        const functionManifest = manifest.pages[fnKey];
+
         if (functionManifest) {
-          const dir = join(fixture, '.output/server/pages', pathWithIndex);
+          const entry = path.join(fixture, '.output/server/pages', fnKey);
+          const nftFile = JSON.parse(
+            await fsp.readFile(`${entry}.nft.json`, 'utf8')
+          );
+
+          const zip = new ZipFile();
+          zip.addFile(
+            path.join(fixture, '.output/server/pages', fnKey),
+            path.join('.output/server/pages', fnKey)
+          );
+
+          nftFile.files.forEach((f: { input: string; output: string }) => {
+            const input = path.join(path.dirname(entry), f.input);
+            zip.addFile(input, f.output);
+          });
+          zip.end();
+
+          const handler = path.posix.join(
+            '.output/server/pages',
+            path.dirname(fnKey),
+            functionManifest.handler
+          );
+
           fn = await createFunction({
             Code: {
-              Directory: dir,
+              ZipFile: await streamToBuffer(zip.outputStream),
             },
-            Handler: functionManifest.handler,
+            Handler: handler,
             Runtime: functionManifest.runtime,
           });
-          functions.set(pathWithIndex, fn);
+          functions.set(functionPath, fn);
         }
       }
 
@@ -109,6 +137,12 @@ function withFixture<T>(
       });
     }
 
+    if (
+      await fsp.lstat(path.join(fixture, 'package.json')).catch(() => false)
+    ) {
+      await runNpmInstall(fixture);
+    }
+
     await build({ workPath: fixture });
 
     try {
@@ -316,4 +350,28 @@ describe('build()', () => {
       expect(body3.includes('GraphQL Playground')).toEqual(true);
     })
   );
+
+  it(
+    'should build "nested-lock-and-build"',
+    withFixture('nested-lock-and-build', async ({ fetch }) => {
+      const resA = await fetch('/api/users/[id]');
+
+      expect(resA.headers.get('x-date')).toEqual('2021-11-20T20:00:00.000Z');
+
+      const body = await resA.text();
+      expect(body).toEqual(
+        ' _______________________________\n' +
+          '< Hello from /api/users/[id].js >\n' +
+          ' -------------------------------\n' +
+          '        \\   ^__^\n' +
+          '         \\  (oo)\\_______\n' +
+          '            (__)\\       )\\/\\\n' +
+          '                ||----w |\n' +
+          '                ||     ||'
+      );
+
+      const resB = await fetch('/api/profile');
+      expect(await resB.text()).toEqual('true');
+    })
+  );
 });

packages/plugin-node/test/fixtures/nested-lock-and-build/api/package.json

@@ -0,0 +1,8 @@
+{
+  "scripts": {
+    "vercel-build": "node ./script.js"
+  },
+  "dependencies": {
+    "cowsay": "1.5.0"
+  }
+}

packages/plugin-node/test/fixtures/nested-lock-and-build/api/profile.js

@@ -0,0 +1,9 @@
+const isSvg = require('is-svg');
+
+module.exports = (req, res) => {
+  res.end(
+    isSvg(
+      '<svg xmlns="http://www.w3.org/2000/svg"><path fill="#00CD9F"/></svg>'
+    ).toString()
+  );
+};

packages/plugin-node/test/fixtures/nested-lock-and-build/api/script.js

@@ -0,0 +1,11 @@
+const fs = require('fs');
+const path = require('path');
+
+fs.writeFileSync(
+  path.join(__dirname, 'users', '.date.js'),
+  `
+module.exports = {
+  date: '2021-11-20T20:00:00.000Z'
+};
+`.trim()
+);

packages/plugin-node/test/fixtures/nested-lock-and-build/api/users/[id].js

@@ -0,0 +1,11 @@
+const cowsay = require('cowsay');
+const { date } = require('./.date');
+
+module.exports = (req, res) => {
+  res.setHeader('x-date', date);
+  res.end(
+    cowsay.say({
+      text: 'Hello from /api/users/[id].js',
+    })
+  );
+};

packages/plugin-node/test/fixtures/nested-lock-and-build/api/yarn.lock

@@ -0,0 +1,220 @@
+# THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY.
+# yarn lockfile v1
+
+
+ansi-regex@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/ansi-regex/-/ansi-regex-3.0.0.tgz#ed0317c322064f79466c02966bddb605ab37d998"
+  integrity sha1-7QMXwyIGT3lGbAKWa922Bas32Zg=
+
+ansi-regex@^5.0.1:
+  version "5.0.1"
+  resolved "https://registry.yarnpkg.com/ansi-regex/-/ansi-regex-5.0.1.tgz#082cb2c89c9fe8659a311a53bd6a4dc5301db304"
+  integrity sha512-quJQXlTSUGL2LH9SUXo8VwsY4soanhgo6LNSm84E1LBcE8s3O0wpdiRzyR9z/ZZJMlMWv37qOOb9pdJlMUEKFQ==
+
+ansi-styles@^4.0.0:
+  version "4.3.0"
+  resolved "https://registry.yarnpkg.com/ansi-styles/-/ansi-styles-4.3.0.tgz#edd803628ae71c04c85ae7a0906edad34b648937"
+  integrity sha512-zbB9rCJAT1rbjiVDb2hqKFHNYLxgtk8NURxZ3IZwD3F6NtxbXZQCnnSi1Lkx+IDohdPlFp222wVALIheZJQSEg==
+  dependencies:
+    color-convert "^2.0.1"
+
+camelcase@^5.0.0:
+  version "5.3.1"
+  resolved "https://registry.yarnpkg.com/camelcase/-/camelcase-5.3.1.tgz#e3c9b31569e106811df242f715725a1f4c494320"
+  integrity sha512-L28STB170nwWS63UjtlEOE3dldQApaJXZkOI1uMFfzf3rRuPegHaHesyee+YxQ+W6SvRDQV6UrdOdRiR153wJg==
+
+cliui@^6.0.0:
+  version "6.0.0"
+  resolved "https://registry.yarnpkg.com/cliui/-/cliui-6.0.0.tgz#511d702c0c4e41ca156d7d0e96021f23e13225b1"
+  integrity sha512-t6wbgtoCXvAzst7QgXxJYqPt0usEfbgQdftEPbLL/cvv6HPE5VgvqCuAIDR0NgU52ds6rFwqrgakNLrHEjCbrQ==
+  dependencies:
+    string-width "^4.2.0"
+    strip-ansi "^6.0.0"
+    wrap-ansi "^6.2.0"
+
+color-convert@^2.0.1:
+  version "2.0.1"
+  resolved "https://registry.yarnpkg.com/color-convert/-/color-convert-2.0.1.tgz#72d3a68d598c9bdb3af2ad1e84f21d896abd4de3"
+  integrity sha512-RRECPsj7iu/xb5oKYcsFHSppFNnsj/52OVTRKb4zP5onXwVF3zVmmToNcOfGC+CRDpfK/U584fMg38ZHCaElKQ==
+  dependencies:
+    color-name "~1.1.4"
+
+color-name@~1.1.4:
+  version "1.1.4"
+  resolved "https://registry.yarnpkg.com/color-name/-/color-name-1.1.4.tgz#c2a09a87acbde69543de6f63fa3995c826c536a2"
+  integrity sha512-dOy+3AuW3a2wNbZHIuMZpTcgjGuLU/uBL/ubcZF9OXbDo8ff4O8yVp5Bf0efS8uEoYo5q4Fx7dY9OgQGXgAsQA==
+
+cowsay@1.5.0:
+  version "1.5.0"
+  resolved "https://registry.yarnpkg.com/cowsay/-/cowsay-1.5.0.tgz#4a2a453b8b59383c7d7a50e44d765c5de0bf615f"
+  integrity sha512-8Ipzr54Z8zROr/62C8f0PdhQcDusS05gKTS87xxdji8VbWefWly0k8BwGK7+VqamOrkv3eGsCkPtvlHzrhWsCA==
+  dependencies:
+    get-stdin "8.0.0"
+    string-width "~2.1.1"
+    strip-final-newline "2.0.0"
+    yargs "15.4.1"
+
+decamelize@^1.2.0:
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/decamelize/-/decamelize-1.2.0.tgz#f6534d15148269b20352e7bee26f501f9a191290"
+  integrity sha1-9lNNFRSCabIDUue+4m9QH5oZEpA=
+
+emoji-regex@^8.0.0:
+  version "8.0.0"
+  resolved "https://registry.yarnpkg.com/emoji-regex/-/emoji-regex-8.0.0.tgz#e818fd69ce5ccfcb404594f842963bf53164cc37"
+  integrity sha512-MSjYzcWNOA0ewAHpz0MxpYFvwg6yjy1NG3xteoqz644VCo/RPgnr1/GGt+ic3iJTzQ8Eu3TdM14SawnVUmGE6A==
+
+find-up@^4.1.0:
+  version "4.1.0"
+  resolved "https://registry.yarnpkg.com/find-up/-/find-up-4.1.0.tgz#97afe7d6cdc0bc5928584b7c8d7b16e8a9aa5d19"
+  integrity sha512-PpOwAdQ/YlXQ2vj8a3h8IipDuYRi3wceVQQGYWxNINccq40Anw7BlsEXCMbt1Zt+OLA6Fq9suIpIWD0OsnISlw==
+  dependencies:
+    locate-path "^5.0.0"
+    path-exists "^4.0.0"
+
+get-caller-file@^2.0.1:
+  version "2.0.5"
+  resolved "https://registry.yarnpkg.com/get-caller-file/-/get-caller-file-2.0.5.tgz#4f94412a82db32f36e3b0b9741f8a97feb031f7e"
+  integrity sha512-DyFP3BM/3YHTQOCUL/w0OZHR0lpKeGrxotcHWcqNEdnltqFwXVfhEBQ94eIo34AfQpo0rGki4cyIiftY06h2Fg==
+
+get-stdin@8.0.0:
+  version "8.0.0"
+  resolved "https://registry.yarnpkg.com/get-stdin/-/get-stdin-8.0.0.tgz#cbad6a73feb75f6eeb22ba9e01f89aa28aa97a53"
+  integrity sha512-sY22aA6xchAzprjyqmSEQv4UbAAzRN0L2dQB0NlN5acTTK9Don6nhoc3eAbUnpZiCANAMfd/+40kVdKfFygohg==
+
+is-fullwidth-code-point@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/is-fullwidth-code-point/-/is-fullwidth-code-point-2.0.0.tgz#a3b30a5c4f199183167aaab93beefae3ddfb654f"
+  integrity sha1-o7MKXE8ZkYMWeqq5O+764937ZU8=
+
+is-fullwidth-code-point@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/is-fullwidth-code-point/-/is-fullwidth-code-point-3.0.0.tgz#f116f8064fe90b3f7844a38997c0b75051269f1d"
+  integrity sha512-zymm5+u+sCsSWyD9qNaejV3DFvhCKclKdizYaJUuHA83RLjb7nSuGnddCHGv0hk+KY7BMAlsWeK4Ueg6EV6XQg==
+
+locate-path@^5.0.0:
+  version "5.0.0"
+  resolved "https://registry.yarnpkg.com/locate-path/-/locate-path-5.0.0.tgz#1afba396afd676a6d42504d0a67a3a7eb9f62aa0"
+  integrity sha512-t7hw9pI+WvuwNJXwk5zVHpyhIqzg2qTlklJOf0mVxGSbe3Fp2VieZcduNYjaLDoy6p9uGpQEGWG87WpMKlNq8g==
+  dependencies:
+    p-locate "^4.1.0"
+
+p-limit@^2.2.0:
+  version "2.3.0"
+  resolved "https://registry.yarnpkg.com/p-limit/-/p-limit-2.3.0.tgz#3dd33c647a214fdfffd835933eb086da0dc21db1"
+  integrity sha512-//88mFWSJx8lxCzwdAABTJL2MyWB12+eIY7MDL2SqLmAkeKU9qxRvWuSyTjm3FUmpBEMuFfckAIqEaVGUDxb6w==
+  dependencies:
+    p-try "^2.0.0"
+
+p-locate@^4.1.0:
+  version "4.1.0"
+  resolved "https://registry.yarnpkg.com/p-locate/-/p-locate-4.1.0.tgz#a3428bb7088b3a60292f66919278b7c297ad4f07"
+  integrity sha512-R79ZZ/0wAxKGu3oYMlz8jy/kbhsNrS7SKZ7PxEHBgJ5+F2mtFW2fK2cOtBh1cHYkQsbzFV7I+EoRKe6Yt0oK7A==
+  dependencies:
+    p-limit "^2.2.0"
+
+p-try@^2.0.0:
+  version "2.2.0"
+  resolved "https://registry.yarnpkg.com/p-try/-/p-try-2.2.0.tgz#cb2868540e313d61de58fafbe35ce9004d5540e6"
+  integrity sha512-R4nPAVTAU0B9D35/Gk3uJf/7XYbQcyohSKdvAxIRSNghFl4e71hVoGnBNQz9cWaXxO2I10KTC+3jMdvvoKw6dQ==
+
+path-exists@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/path-exists/-/path-exists-4.0.0.tgz#513bdbe2d3b95d7762e8c1137efa195c6c61b5b3"
+  integrity sha512-ak9Qy5Q7jYb2Wwcey5Fpvg2KoAc/ZIhLSLOSBmRmygPsGwkVVt0fZa0qrtMz+m6tJTAHfZQ8FnmB4MG4LWy7/w==
+
+require-directory@^2.1.1:
+  version "2.1.1"
+  resolved "https://registry.yarnpkg.com/require-directory/-/require-directory-2.1.1.tgz#8c64ad5fd30dab1c976e2344ffe7f792a6a6df42"
+  integrity sha1-jGStX9MNqxyXbiNE/+f3kqam30I=
+
+require-main-filename@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/require-main-filename/-/require-main-filename-2.0.0.tgz#d0b329ecc7cc0f61649f62215be69af54aa8989b"
+  integrity sha512-NKN5kMDylKuldxYLSUfrbo5Tuzh4hd+2E8NPPX02mZtn1VuREQToYe/ZdlJy+J3uCpfaiGF05e7B8W0iXbQHmg==
+
+set-blocking@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/set-blocking/-/set-blocking-2.0.0.tgz#045f9782d011ae9a6803ddd382b24392b3d890f7"
+  integrity sha1-BF+XgtARrppoA93TgrJDkrPYkPc=
+
+string-width@^4.1.0, string-width@^4.2.0:
+  version "4.2.3"
+  resolved "https://registry.yarnpkg.com/string-width/-/string-width-4.2.3.tgz#269c7117d27b05ad2e536830a8ec895ef9c6d010"
+  integrity sha512-wKyQRQpjJ0sIp62ErSZdGsjMJWsap5oRNihHhu6G7JVO/9jIB6UyevL+tXuOqrng8j/cxKTWyWUwvSTriiZz/g==
+  dependencies:
+    emoji-regex "^8.0.0"
+    is-fullwidth-code-point "^3.0.0"
+    strip-ansi "^6.0.1"
+
+string-width@~2.1.1:
+  version "2.1.1"
+  resolved "https://registry.yarnpkg.com/string-width/-/string-width-2.1.1.tgz#ab93f27a8dc13d28cac815c462143a6d9012ae9e"
+  integrity sha512-nOqH59deCq9SRHlxq1Aw85Jnt4w6KvLKqWVik6oA9ZklXLNIOlqg4F2yrT1MVaTjAqvVwdfeZ7w7aCvJD7ugkw==
+  dependencies:
+    is-fullwidth-code-point "^2.0.0"
+    strip-ansi "^4.0.0"
+
+strip-ansi@^4.0.0:
+  version "4.0.0"
+  resolved "https://registry.yarnpkg.com/strip-ansi/-/strip-ansi-4.0.0.tgz#a8479022eb1ac368a871389b635262c505ee368f"
+  integrity sha1-qEeQIusaw2iocTibY1JixQXuNo8=
+  dependencies:
+    ansi-regex "^3.0.0"
+
+strip-ansi@^6.0.0, strip-ansi@^6.0.1:
+  version "6.0.1"
+  resolved "https://registry.yarnpkg.com/strip-ansi/-/strip-ansi-6.0.1.tgz#9e26c63d30f53443e9489495b2105d37b67a85d9"
+  integrity sha512-Y38VPSHcqkFrCpFnQ9vuSXmquuv5oXOKpGeT6aGrr3o3Gc9AlVa6JBfUSOCnbxGGZF+/0ooI7KrPuUSztUdU5A==
+  dependencies:
+    ansi-regex "^5.0.1"
+
+strip-final-newline@2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/strip-final-newline/-/strip-final-newline-2.0.0.tgz#89b852fb2fcbe936f6f4b3187afb0a12c1ab58ad"
+  integrity sha512-BrpvfNAE3dcvq7ll3xVumzjKjZQ5tI1sEUIKr3Uoks0XUl45St3FlatVqef9prk4jRDzhW6WZg+3bk93y6pLjA==
+
+which-module@^2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/which-module/-/which-module-2.0.0.tgz#d9ef07dce77b9902b8a3a8fa4b31c3e3f7e6e87a"
+  integrity sha1-2e8H3Od7mQK4o6j6SzHD4/fm6Ho=
+
+wrap-ansi@^6.2.0:
+  version "6.2.0"
+  resolved "https://registry.yarnpkg.com/wrap-ansi/-/wrap-ansi-6.2.0.tgz#e9393ba07102e6c91a3b221478f0257cd2856e53"
+  integrity sha512-r6lPcBGxZXlIcymEu7InxDMhdW0KDxpLgoFLcguasxCaJ/SOIZwINatK9KY/tf+ZrlywOKU0UDj3ATXUBfxJXA==
+  dependencies:
+    ansi-styles "^4.0.0"
+    string-width "^4.1.0"
+    strip-ansi "^6.0.0"
+
+y18n@^4.0.0:
+  version "4.0.3"
+  resolved "https://registry.yarnpkg.com/y18n/-/y18n-4.0.3.tgz#b5f259c82cd6e336921efd7bfd8bf560de9eeedf"
+  integrity sha512-JKhqTOwSrqNA1NY5lSztJ1GrBiUodLMmIZuLiDaMRJ+itFd+ABVE8XBjOvIWL+rSqNDC74LCSFmlb/U4UZ4hJQ==
+
+yargs-parser@^18.1.2:
+  version "18.1.3"
+  resolved "https://registry.yarnpkg.com/yargs-parser/-/yargs-parser-18.1.3.tgz#be68c4975c6b2abf469236b0c870362fab09a7b0"
+  integrity sha512-o50j0JeToy/4K6OZcaQmW6lyXXKhq7csREXcDwk2omFPJEwUNOVtJKvmDr9EI1fAJZUyZcRF7kxGBWmRXudrCQ==
+  dependencies:
+    camelcase "^5.0.0"
+    decamelize "^1.2.0"
+
+yargs@15.4.1:
+  version "15.4.1"
+  resolved "https://registry.yarnpkg.com/yargs/-/yargs-15.4.1.tgz#0d87a16de01aee9d8bec2bfbf74f67851730f4f8"
+  integrity sha512-aePbxDmcYW++PaqBsJ+HYUFwCdv4LVvdnhBy78E57PIor8/OVvhMrADFFEDh8DHDFRv/O9i3lPhsENjO7QX0+A==
+  dependencies:
+    cliui "^6.0.0"
+    decamelize "^1.2.0"
+    find-up "^4.1.0"
+    get-caller-file "^2.0.1"
+    require-directory "^2.1.1"
+    require-main-filename "^2.0.0"
+    set-blocking "^2.0.0"
+    string-width "^4.2.0"
+    which-module "^2.0.0"
+    y18n "^4.0.0"
+    yargs-parser "^18.1.2"

packages/plugin-node/test/fixtures/nested-lock-and-build/package.json

@@ -0,0 +1,5 @@
+{
+  "dependencies": {
+    "is-svg": "4.3.1"
+  }
+}

packages/plugin-node/test/fixtures/nested-lock-and-build/yarn.lock

@@ -0,0 +1,22 @@
+# THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY.
+# yarn lockfile v1
+
+
+fast-xml-parser@^3.19.0:
+  version "3.21.1"
+  resolved "https://registry.yarnpkg.com/fast-xml-parser/-/fast-xml-parser-3.21.1.tgz#152a1d51d445380f7046b304672dd55d15c9e736"
+  integrity sha512-FTFVjYoBOZTJekiUsawGsSYV9QL0A+zDYCRj7y34IO6Jg+2IMYEtQa+bbictpdpV8dHxXywqU7C0gRDEOFtBFg==
+  dependencies:
+    strnum "^1.0.4"
+
+is-svg@4.3.1:
+  version "4.3.1"
+  resolved "https://registry.yarnpkg.com/is-svg/-/is-svg-4.3.1.tgz#8c63ec8c67c8c7f0a8de0a71c8c7d58eccf4406b"
+  integrity sha512-h2CGs+yPUyvkgTJQS9cJzo9lYK06WgRiXUqBBHtglSzVKAuH4/oWsqk7LGfbSa1hGk9QcZ0SyQtVggvBA8LZXA==
+  dependencies:
+    fast-xml-parser "^3.19.0"
+
+strnum@^1.0.4:
+  version "1.0.4"
+  resolved "https://registry.yarnpkg.com/strnum/-/strnum-1.0.4.tgz#e97e36a7d6ba9f93d0d6b496b2ed0678d422832b"
+  integrity sha512-lMzNMfDpaQOLt4B2mEbfzYS0+T7dvCXeojnlGf6f1AygvWDMcWyXYaLbyICfjVu29sErR8fnRagQfBW/N/hGgw==

packages/plugin-python/package.json

@@ -1,7 +1,7 @@
 {
   "private": false,
   "name": "vercel-plugin-python",
-  "version": "1.0.0-canary.1",
+  "version": "1.0.0-canary.6",
   "main": "dist/index.js",
   "license": "MIT",
   "files": [
@@ -17,8 +17,8 @@
     "prepublishOnly": "tsc"
   },
   "dependencies": {
-    "@vercel/build-utils": "2.12.3-canary.17",
+    "@vercel/build-utils": "2.12.3-canary.20",
-    "@vercel/python": "2.0.6-canary.5"
+    "@vercel/python": "2.1.0"
   },
   "devDependencies": {
     "@types/node": "*",

packages/plugin-ruby/package.json

@@ -1,7 +1,7 @@
 {
   "private": false,
   "name": "vercel-plugin-ruby",
-  "version": "1.0.0-canary.1",
+  "version": "1.0.0-canary.4",
   "main": "dist/index.js",
   "license": "MIT",
   "files": [
@@ -17,7 +17,7 @@
     "prepublishOnly": "tsc"
   },
   "dependencies": {
-    "@vercel/build-utils": "2.12.3-canary.17",
+    "@vercel/build-utils": "2.12.3-canary.20",
     "@vercel/ruby": "1.2.8-canary.4"
   },
   "devDependencies": {

packages/python/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@vercel/python",
-  "version": "2.0.6-canary.5",
+  "version": "2.0.6-canary.7",
   "main": "./dist/index.js",
   "license": "MIT",
   "homepage": "https://vercel.com/docs/runtimes#official-runtimes/python",

packages/python/src/index.ts

@@ -13,6 +13,7 @@ import {
   createLambda,
   shouldServe,
   debug,
+  NowBuildError,
 } from '@vercel/build-utils';
 import { installRequirement, installRequirementsFile } from './install';
 
@@ -22,6 +23,7 @@ async function pipenvConvert(cmd: string, srcDir: string) {
     const out = await execa.stdout(cmd, [], {
       cwd: srcDir,
     });
+    debug('Contents of requirements.txt is: ' + out);
     fs.writeFileSync(join(srcDir, 'requirements.txt'), out);
   } catch (err) {
     console.log('Failed to run "pipfile2req"');
@@ -57,6 +59,10 @@ export const build = async ({
   meta = {},
   config,
 }: BuildOptions) => {
+  let pipPath = meta.isDev ? 'pip3' : 'pip3.9';
+  let pythonPath = meta.isDev ? 'python3' : 'python3.9';
+  let pythonRuntime = meta.isDev ? 'python3' : 'python3.9';
+
   workPath = await downloadFilesInWorkPath({
     workPath,
     files: originalFiles,
@@ -85,6 +91,8 @@ export const build = async ({
   console.log('Installing required dependencies...');
 
   await installRequirement({
+    pythonPath,
+    pipPath,
     dependency: 'werkzeug',
     version: '1.0.1',
     workPath,
@@ -103,12 +111,43 @@ export const build = async ({
   if (pipfileLockDir) {
     debug('Found "Pipfile.lock"');
 
+    try {
+      const json = await readFile(join(pipfileLockDir, 'Pipfile.lock'), 'utf8');
+      const obj = JSON.parse(json);
+      const version = obj?._meta?.requires?.python_version;
+      if (!meta.isDev) {
+        if (version === '3.6') {
+          pipPath = 'pip3.6';
+          pythonPath = 'python3.6';
+          pythonRuntime = 'python3.6';
+          console.warn(
+            `Warning: Python version "${version}" detected in Pipfile.lock will reach End-Of-Life December 2021. Please upgrade. http://vercel.link/python-version`
+          );
+        } else if (version === '3.9') {
+          pipPath = 'pip3.9';
+          pythonPath = 'python3.9';
+          pythonRuntime = 'python3.9';
+        } else {
+          console.warn(
+            `Warning: Invalid Python version "${version}" detected in Pipfile.lock will be ignored. http://vercel.link/python-version`
+          );
+        }
+      }
+    } catch (err) {
+      throw new NowBuildError({
+        code: 'INVALID_PIPFILE_LOCK',
+        message: 'Unable to parse Pipfile.lock',
+      });
+    }
+
     // Convert Pipenv.Lock to requirements.txt.
     // We use a different`workPath` here because we want `pipfile-requirements` and it's dependencies
     // to not be part of the lambda environment. By using pip's `--target` directive we can isolate
     // it into a separate folder.
     const tempDir = await getWriteableDirectory();
     await installRequirement({
+      pythonPath,
+      pipPath,
       dependency: 'pipfile-requirements',
       version: '0.3.0',
       workPath: tempDir,
@@ -130,6 +169,8 @@ export const build = async ({
     debug('Found local "requirements.txt"');
     const requirementsTxtPath = fsFiles[requirementsTxt].fsPath;
     await installRequirementsFile({
+      pythonPath,
+      pipPath,
       filePath: requirementsTxtPath,
       workPath,
       meta,
@@ -138,6 +179,8 @@ export const build = async ({
     debug('Found global "requirements.txt"');
     const requirementsTxtPath = fsFiles['requirements.txt'].fsPath;
     await installRequirementsFile({
+      pythonPath,
+      pipPath,
       filePath: requirementsTxtPath,
       workPath,
       meta,
@@ -163,7 +206,7 @@ export const build = async ({
   await writeFile(join(workPath, `${handlerPyFilename}.py`), handlerPyContents);
 
   // Use the system-installed version of `python3` when running via `vercel dev`
-  const runtime = meta.isDev ? 'python3' : 'python3.6';
+  const runtime = meta.isDev ? 'python3' : pythonRuntime;
 
   const globOptions: GlobOptions = {
     cwd: workPath,

packages/python/src/install.ts

@@ -1,6 +1,5 @@
 import execa from 'execa';
 import { Meta, debug } from '@vercel/build-utils';
-const pipPath = 'pip3';
 
 const makeDependencyCheckCode = (dependency: string) => `
 from importlib import util
@@ -9,10 +8,14 @@ spec = util.find_spec(dep)
 print(spec.origin)
 `;
 
-async function isInstalled(dependency: string, cwd: string) {
+async function isInstalled(
+  pythonPath: string,
+  dependency: string,
+  cwd: string
+) {
   try {
     const { stdout } = await execa(
-      'python3',
+      pythonPath,
       ['-c', makeDependencyCheckCode(dependency)],
       {
         stdio: 'pipe',
@@ -33,10 +36,14 @@ dependencies = distutils.text_file.TextFile(filename='${requirementsPath}').read
 pkg_resources.require(dependencies)
 `;
 
-async function areRequirementsInstalled(requirementsPath: string, cwd: string) {
+async function areRequirementsInstalled(
+  pythonPath: string,
+  requirementsPath: string,
+  cwd: string
+) {
   try {
     await execa(
-      'python3',
+      pythonPath,
       ['-c', makeRequirementsCheckCode(requirementsPath)],
       {
         stdio: 'pipe',
@@ -49,7 +56,7 @@ async function areRequirementsInstalled(requirementsPath: string, cwd: string) {
   }
 }
 
-async function pipInstall(workPath: string, args: string[]) {
+async function pipInstall(pipPath: string, workPath: string, args: string[]) {
   const target = '.';
   // See: https://github.com/pypa/pip/issues/4222#issuecomment-417646535
   //
@@ -66,19 +73,21 @@ async function pipInstall(workPath: string, args: string[]) {
     target,
     ...args,
   ];
-  debug(`Running "pip3 ${cmdArgs.join(' ')}"...`);
+  const pretty = `${pipPath} ${cmdArgs.join(' ')}`;
+  debug(`Running "${pretty}"...`);
   try {
     await execa(pipPath, cmdArgs, {
       cwd: workPath,
-      stdio: 'pipe',
     });
   } catch (err) {
-    console.log(`Failed to run "pip3 ${cmdArgs.join(' ')}"`);
+    console.log(`Failed to run "${pretty}"`);
     throw err;
   }
 }
 
 interface InstallRequirementArg {
+  pythonPath: string;
+  pipPath: string;
   dependency: string;
   version: string;
   workPath: string;
@@ -91,23 +100,27 @@ interface InstallRequirementArg {
 // so vc_init should do runtime version checks to be compatible with any recent
 // version of its dependencies
 export async function installRequirement({
+  pythonPath,
+  pipPath,
   dependency,
   version,
   workPath,
   meta,
   args = [],
 }: InstallRequirementArg) {
-  if (meta.isDev && (await isInstalled(dependency, workPath))) {
+  if (meta.isDev && (await isInstalled(pythonPath, dependency, workPath))) {
     debug(
       `Skipping ${dependency} dependency installation, already installed in ${workPath}`
     );
     return;
   }
   const exact = `${dependency}==${version}`;
-  await pipInstall(workPath, [exact, ...args]);
+  await pipInstall(pipPath, workPath, [exact, ...args]);
 }
 
 interface InstallRequirementsFileArg {
+  pythonPath: string;
+  pipPath: string;
   filePath: string;
   workPath: string;
   meta: Meta;
@@ -115,14 +128,19 @@ interface InstallRequirementsFileArg {
 }
 
 export async function installRequirementsFile({
+  pythonPath,
+  pipPath,
   filePath,
   workPath,
   meta,
   args = [],
 }: InstallRequirementsFileArg) {
-  if (meta.isDev && (await areRequirementsInstalled(filePath, workPath))) {
+  if (
+    meta.isDev &&
+    (await areRequirementsInstalled(pythonPath, filePath, workPath))
+  ) {
     debug(`Skipping requirements file installation, already installed`);
     return;
   }
-  await pipInstall(workPath, ['--upgrade', '-r', filePath, ...args]);
+  await pipInstall(pipPath, workPath, ['--upgrade', '-r', filePath, ...args]);
 }

packages/python/test/fixtures/02-wsgi-pipenv/now.json

@@ -1,5 +0,0 @@
-{
-  "version": 2,
-  "builds": [{ "src": "index.py", "use": "@vercel/python" }],
-  "probes": [{ "path": "/", "mustContain": "wsgi:RANDOMNESS_PLACEHOLDER" }]
-}

packages/python/test/fixtures/02-wsgi-pipenv/vercel.json

@@ -0,0 +1,11 @@
+{
+  "version": 2,
+  "builds": [{ "src": "index.py", "use": "@vercel/python" }],
+  "probes": [
+    {
+      "path": "/",
+      "mustContain": "wsgi:RANDOMNESS_PLACEHOLDER",
+      "logMustContain": "Warning: Python version \"3.6\" detected in Pipfile.lock will reach End-Of-Life December 2021. Please upgrade."
+    }
+  ]
+}

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

@@ -1,8 +0,0 @@
-{
-  "version": 2,
-  "builds": [{ "src": "index.py", "use": "@vercel/python" }],
-  "env": {
-    "RANDOMNESS": "RANDOMNESS_PLACEHOLDER"
-  },
-  "probes": [{ "path": "/", "mustContain": "RANDOMNESS_PLACEHOLDER:env" }]
-}

packages/python/test/fixtures/03-env-vars/vercel.json

@@ -0,0 +1,14 @@
+{
+  "version": 2,
+  "builds": [{ "src": "index.py", "use": "@vercel/python" }],
+  "env": {
+    "RANDOMNESS": "RANDOMNESS_PLACEHOLDER"
+  },
+  "probes": [
+    {
+      "path": "/",
+      "mustContain": "RANDOMNESS_PLACEHOLDER:env",
+      "logMustContain": "Warning: Python version \"3.6\" detected in Pipfile.lock will reach End-Of-Life December 2021. Please upgrade."
+    }
+  ]
+}

packages/python/test/fixtures/04-cowsay-pipfile/now.json

@@ -1,5 +0,0 @@
-{
-  "version": 2,
-  "builds": [{ "src": "**/**.py", "use": "@vercel/python" }],
-  "probes": [{ "path": "/", "mustContain": "pip:RANDOMNESS_PLACEHOLDER" }]
-}

packages/python/test/fixtures/04-cowsay-pipfile/vercel.json

@@ -0,0 +1,11 @@
+{
+  "version": 2,
+  "builds": [{ "src": "**/**.py", "use": "@vercel/python" }],
+  "probes": [
+    {
+      "path": "/",
+      "mustContain": "pip:RANDOMNESS_PLACEHOLDER",
+      "logMustContain": "Warning: Invalid Python version \"3.7\" detected in Pipfile.lock will be ignored."
+    }
+  ]
+}

packages/python/tsconfig.json

@@ -13,6 +13,6 @@
     "outDir": "dist",
     "types": ["node"],
     "strict": true,
-    "target": "esnext"
+    "target": "es2018"
   }
 }

test/lib/deployment/now-deploy.js

@@ -20,7 +20,12 @@ async function nowDeploy(bodies, randomness, uploadNowJson) {
         (path.extname(n) === '.sh' ? 0o100755 : 0o100644),
     }));
 
-  const { FORCE_BUILD_IN_REGION, NOW_DEBUG, VERCEL_DEBUG } = process.env;
+  const {
+    FORCE_BUILD_IN_REGION,
+    NOW_DEBUG,
+    VERCEL_DEBUG,
+    VERCEL_BUILDER_DEBUG,
+  } = process.env;
   const nowJson = JSON.parse(bodies['vercel.json'] || bodies['now.json']);
 
   const nowDeployPayload = {
@@ -34,6 +39,7 @@ async function nowDeploy(bodies, randomness, uploadNowJson) {
         FORCE_BUILD_IN_REGION,
         NOW_DEBUG,
         VERCEL_DEBUG,
+        VERCEL_BUILDER_DEBUG,
       },
     },
     name: 'test2020',

yarn.lock

@@ -2537,7 +2537,7 @@
   dependencies:
     "@types/yargs-parser" "*"
 
-"@types/yazl@^2.4.1":
+"@types/yazl@2.4.2", "@types/yazl@^2.4.1":
   version "2.4.2"
   resolved "https://registry.yarnpkg.com/@types/yazl/-/yazl-2.4.2.tgz#d5f8a4752261badbf1a36e8b49e042dc18ec84bc"
   integrity sha512-T+9JH8O2guEjXNxqmybzQ92mJUh2oCwDDMSSimZSe1P+pceZiFROZLYmcbqkzV5EUwz6VwcKXCO2S2yUpra6XQ==
@@ -2613,10 +2613,10 @@
     "@typescript-eslint/types" "4.28.0"
     eslint-visitor-keys "^2.0.0"
 
-"@vercel/fun@1.0.1":
+"@vercel/fun@1.0.3":
-  version "1.0.1"
+  version "1.0.3"
-  resolved "https://registry.yarnpkg.com/@vercel/fun/-/fun-1.0.1.tgz#4b25f50c27bbbdca5b7e71f25ef5018701467962"
+  resolved "https://registry.yarnpkg.com/@vercel/fun/-/fun-1.0.3.tgz#5e5c4921a3a3a35ee129ce063e6b3f5c4b1eae48"
-  integrity sha512-v++KDTdKIr0357sm0AbyYk5jLmsqfUlOKhTsaN0Z/XHpk2YJHOLlGFTDzZPt+8i+ofdPG8lCfht729DHNQskJg==
+  integrity sha512-9LKNosC+Sdx7ZNU7dnj7XXasHzgRkuDnz9+N6JzSVvb0v8KOZN0ky4+wn3c1B0/wF3dTn2W5nEzgmnsrVCDtkQ==
   dependencies:
     "@tootallnate/once" "2.0.0"
     async-listen "1.0.0"
@@ -2629,6 +2629,7 @@
     node-fetch "2.6.1"
     path-match "1.2.4"
     promisepipe "3.0.0"
+    semver "7.3.5"
     stat-mode "0.3.0"
     stream-to-promise "2.2.0"
     tar "4.4.18"
@@ -8992,10 +8993,10 @@ node-fetch-npm@^2.0.2:
     json-parse-better-errors "^1.0.0"
     safe-buffer "^5.1.1"
 
-node-fetch@2, node-fetch@^2:
+node-fetch@2:
-  version "2.6.5"
+  version "2.6.6"
-  resolved "https://registry.yarnpkg.com/node-fetch/-/node-fetch-2.6.5.tgz#42735537d7f080a7e5f78b6c549b7146be1742fd"
+  resolved "https://registry.yarnpkg.com/node-fetch/-/node-fetch-2.6.6.tgz#1751a7c01834e8e1697758732e9efb6eeadfaf89"
-  integrity sha512-mmlIVHJEu5rnIxgEgez6b9GgWXbkZj5YZ7fx+2r94a2E+Uirsp6HsPTPlomfdHtpt/B0cdKviwkoaM6pyvUOpQ==
+  integrity sha512-Z8/6vRlTUChSdIgMa51jxQ4lrw/Jy5SOW10ObaA47/RElsAN2c5Pn8bTgFGWn/ibwzXTE8qwr1Yzx28vsecXEA==
   dependencies:
     whatwg-url "^5.0.0"
 
@@ -9009,6 +9010,13 @@ node-fetch@2.6.1, node-fetch@^2.2.1, node-fetch@^2.3.0, node-fetch@^2.5.0, node-
   resolved "https://registry.yarnpkg.com/node-fetch/-/node-fetch-2.6.1.tgz#045bd323631f76ed2e2b55573394416b639a0052"
   integrity sha512-V4aYg89jEoVRxRb2fJdAg8FHvI7cEyYdVAh94HH0UIK8oJxUfkjlDQN9RbMx+bEjP7+ggMiFRprSti032Oipxw==
 
+node-fetch@^2:
+  version "2.6.5"
+  resolved "https://registry.yarnpkg.com/node-fetch/-/node-fetch-2.6.5.tgz#42735537d7f080a7e5f78b6c549b7146be1742fd"
+  integrity sha512-mmlIVHJEu5rnIxgEgez6b9GgWXbkZj5YZ7fx+2r94a2E+Uirsp6HsPTPlomfdHtpt/B0cdKviwkoaM6pyvUOpQ==
+  dependencies:
+    whatwg-url "^5.0.0"
+
 node-gyp-build@^4.2.2:
   version "4.2.3"
   resolved "https://registry.yarnpkg.com/node-gyp-build/-/node-gyp-build-4.2.3.tgz#ce6277f853835f718829efb47db20f3e4d9c4739"
@@ -10665,7 +10673,7 @@ semver@6.1.1:
   resolved "https://registry.yarnpkg.com/semver/-/semver-6.1.1.tgz#53f53da9b30b2103cd4f15eab3a18ecbcb210c9b"
   integrity sha512-rWYq2e5iYW+fFe/oPPtYJxYgjBm8sC4rmoGdUOgBB7VnwKt6HrL793l2voH1UlsyYZpJ4g0wfjnTEO1s1NP2eQ==
 
-semver@7.x, semver@^7.2.1, semver@^7.3.2, semver@^7.3.4, semver@^7.3.5:
+semver@7.3.5, semver@7.x, semver@^7.2.1, semver@^7.3.2, semver@^7.3.4, semver@^7.3.5:
   version "7.3.5"
   resolved "https://registry.yarnpkg.com/semver/-/semver-7.3.5.tgz#0b621c879348d8998e4b0e4be94b3f12e6018ef7"
   integrity sha512-PoeGJYh8HK4BTO/a9Tf6ZG3veo/A7ZVsYrSA6J8ny9nb3B1VrpkuN+z9OE5wfE5p6H4LchYZsegiQgbJD94ZFQ==
@@ -12618,6 +12626,13 @@ yazl@2.4.3:
   dependencies:
     buffer-crc32 "~0.2.3"
 
+yazl@2.5.1:
+  version "2.5.1"
+  resolved "https://registry.yarnpkg.com/yazl/-/yazl-2.5.1.tgz#a3d65d3dd659a5b0937850e8609f22fffa2b5c35"
+  integrity sha512-phENi2PLiHnHb6QBVot+dJnaAZ0xosj7p3fWl+znIjBDlnMI2PsZCJZ306BPTFOaHf5qdDEI8x5qFrSOBN5vrw==
+  dependencies:
+    buffer-crc32 "~0.2.3"
+
 yn@3.1.1, yn@^3.0.0:
   version "3.1.1"
   resolved "https://registry.yarnpkg.com/yn/-/yn-3.1.1.tgz#1e87401a09d767c1d5eab26a6e4c185182d2eb50"