[build-utils][fs-detectors][cli] MAJOR: move some of build-utils into new fs-detectors (#8054)

The `@vercel/build-utils` package was meant be shared functions necessary for writing a Vercel Builder (aka Runtime).

This package has since bloated into the catch-all package for anything that wasn't a Builder.

This PR removes the bloat in favor of a new package, `@vercel/fs-detectors`. It also removes the need for `@vercel/build-utils` to have a dependency on `@vercel/frameworks`.

- Related to #7951

packages/build-utils/package.json

@@ -31,7 +31,6 @@
     "@types/node-fetch": "^2.1.6",
     "@types/semver": "6.0.0",
     "@types/yazl": "2.4.2",
-    "@vercel/frameworks": "1.0.2",
     "@vercel/ncc": "0.24.0",
     "aggregate-error": "3.0.1",
     "async-retry": "1.2.3",

packages/build-utils/src/index.ts

@@ -80,16 +80,6 @@ export {
 };
 
 export { EdgeFunction } from './edge-function';
-export {
-  detectBuilders,
-  detectOutputDirectory,
-  detectApiDirectory,
-  detectApiExtensions,
-} from './detect-builders';
-export { detectFileSystemAPI } from './detect-file-system-api';
-export { detectFramework } from './detect-framework';
-export { getProjectPaths } from './get-project-paths';
-export { DetectorFilesystem } from './detectors/filesystem';
 export { readConfigFile } from './fs/read-config-file';
 export { normalizePath } from './fs/normalize-path';
 
@@ -97,35 +87,3 @@ export * from './should-serve';
 export * from './schemas';
 export * from './types';
 export * from './errors';
-
-/**
- * Helper function to support both `@vercel` and legacy `@now` official Runtimes.
- */
-export const isOfficialRuntime = (desired: string, name?: string): boolean => {
-  if (typeof name !== 'string') {
-    return false;
-  }
-  return (
-    name === `@vercel/${desired}` ||
-    name === `@now/${desired}` ||
-    name.startsWith(`@vercel/${desired}@`) ||
-    name.startsWith(`@now/${desired}@`)
-  );
-};
-
-export const isStaticRuntime = (name?: string): boolean => {
-  return isOfficialRuntime('static', name);
-};
-
-export { workspaceManagers } from './workspaces/workspace-managers';
-export {
-  getWorkspaces,
-  GetWorkspaceOptions,
-  Workspace,
-  WorkspaceType,
-} from './workspaces/get-workspaces';
-export {
-  getWorkspacePackagePaths,
-  GetWorkspacePackagePathsOptions,
-} from './workspaces/get-workspace-package-paths';
-export { monorepoManagers } from './monorepos/monorepo-managers';

packages/build-utils/test/convert-runtime/invalid-functions/api/users.rb

@@ -1 +0,0 @@
-# users.rb

packages/build-utils/test/convert-runtime/invalid-functions/vercel.json

@@ -1,10 +0,0 @@
-{
-  "functions": {
-    "api/users.rb": {
-      "memory": 3008
-    },
-    "api/doesnt-exist.rb": {
-      "memory": 768
-    }
-  }
-}

packages/build-utils/test/convert-runtime/python-api/api/db/[id].py

@@ -1 +0,0 @@
-# [id].py

packages/build-utils/test/convert-runtime/python-api/api/index.py

@@ -1 +0,0 @@
-# index

packages/build-utils/test/convert-runtime/python-api/api/project/[aid]/[bid]/index.py

@@ -1 +0,0 @@
-# project/[aid]/[bid]/index.py

packages/build-utils/test/convert-runtime/python-api/api/users/get.py

@@ -1 +0,0 @@
-# get

packages/build-utils/test/convert-runtime/python-api/api/users/post.py

@@ -1 +0,0 @@
-# post

packages/build-utils/test/convert-runtime/python-api/file.txt

@@ -1 +0,0 @@
-This file should also be included

packages/build-utils/test/convert-runtime/python-api/util/date.py

@@ -1 +0,0 @@
-# date

packages/build-utils/test/convert-runtime/python-api/util/math.py

@@ -1 +0,0 @@
-# math

packages/build-utils/test/convert-runtime/python-api/vercel.json

@@ -1,7 +0,0 @@
-{
-  "functions": {
-    "api/users/post.py": {
-      "memory": 3008
-    }
-  }
-}

packages/build-utils/test/integration.test.ts

@@ -5,7 +5,6 @@ import {
   testDeployment,
   // @ts-ignore
 } from '../../../test/lib/deployment/test-deployment';
-import { glob, detectBuilders } from '../src';
 
 jest.setTimeout(4 * 60 * 1000);
 
@@ -32,11 +31,6 @@ const skipFixtures: string[] = [
   '08-zero-config-middleman',
   '21-npm-workspaces',
   '23-pnpm-workspaces',
-  '27-yarn-workspaces',
-  '28-turborepo-with-yarn-workspaces',
-  '29-nested-workspaces',
-  '30-double-nested-workspaces',
-  '31-turborepo-in-package-json',
 ];
 
 // eslint-disable-next-line no-restricted-syntax
@@ -83,145 +77,3 @@ for (const builder of buildersToTestWith) {
     }
   }
 }
-
-it('Test `detectBuilders` and `detectRoutes`', async () => {
-  const fixture = path.join(__dirname, 'fixtures', '01-zero-config-api');
-  const pkg = await fs.readJSON(path.join(fixture, 'package.json'));
-  const fileList = await glob('**', fixture);
-  const files = Object.keys(fileList);
-
-  const probes = [
-    {
-      path: '/api/my-endpoint',
-      mustContain: 'my-endpoint',
-      status: 200,
-    },
-    {
-      path: '/api/other-endpoint',
-      mustContain: 'other-endpoint',
-      status: 200,
-    },
-    {
-      path: '/api/team/zeit',
-      mustContain: 'team/zeit',
-      status: 200,
-    },
-    {
-      path: '/api/user/myself',
-      mustContain: 'user/myself',
-      status: 200,
-    },
-    {
-      path: '/api/not-okay/',
-      status: 404,
-    },
-    {
-      path: '/api',
-      status: 404,
-    },
-    {
-      path: '/api/',
-      status: 404,
-    },
-    {
-      path: '/',
-      mustContain: 'hello from index.txt',
-    },
-  ];
-
-  const { builders, defaultRoutes } = await detectBuilders(files, pkg);
-
-  const nowConfig = { builds: builders, routes: defaultRoutes, probes };
-
-  await fs.writeFile(
-    path.join(fixture, 'now.json'),
-    JSON.stringify(nowConfig, null, 2)
-  );
-
-  const deployment = await testDeployment(
-    { builderUrl, buildUtilsUrl },
-    fixture
-  );
-  expect(deployment).toBeDefined();
-});
-
-it('Test `detectBuilders` with `index` files', async () => {
-  const fixture = path.join(__dirname, 'fixtures', '02-zero-config-api');
-  const pkg = await fs.readJSON(path.join(fixture, 'package.json'));
-  const fileList = await glob('**', fixture);
-  const files = Object.keys(fileList);
-
-  const probes = [
-    {
-      path: '/api/not-okay',
-      status: 404,
-    },
-    {
-      path: '/api',
-      mustContain: 'hello from api/index.js',
-      status: 200,
-    },
-    {
-      path: '/api/',
-      mustContain: 'hello from api/index.js',
-      status: 200,
-    },
-    {
-      path: '/api/index',
-      mustContain: 'hello from api/index.js',
-      status: 200,
-    },
-    {
-      path: '/api/index.js',
-      mustContain: 'hello from api/index.js',
-      status: 200,
-    },
-    {
-      path: '/api/date.js',
-      mustContain: 'hello from api/date.js',
-      status: 200,
-    },
-    {
-      // Someone might expect this to be `date.js`,
-      // but I doubt that there is any case were both
-      // `date/index.js` and `date.js` exists,
-      // so it is not special cased
-      path: '/api/date',
-      mustContain: 'hello from api/date/index.js',
-      status: 200,
-    },
-    {
-      path: '/api/date/',
-      mustContain: 'hello from api/date/index.js',
-      status: 200,
-    },
-    {
-      path: '/api/date/index',
-      mustContain: 'hello from api/date/index.js',
-      status: 200,
-    },
-    {
-      path: '/api/date/index.js',
-      mustContain: 'hello from api/date/index.js',
-      status: 200,
-    },
-    {
-      path: '/',
-      mustContain: 'hello from index.txt',
-    },
-  ];
-
-  const { builders, defaultRoutes } = await detectBuilders(files, pkg);
-
-  const nowConfig = { builds: builders, routes: defaultRoutes, probes };
-  await fs.writeFile(
-    path.join(fixture, 'now.json'),
-    JSON.stringify(nowConfig, null, 2)
-  );
-
-  const deployment = await testDeployment(
-    { builderUrl, buildUtilsUrl },
-    fixture
-  );
-  expect(deployment).toBeDefined();
-});

packages/build-utils/test/unit.test.ts

@@ -18,6 +18,8 @@ import {
   Meta,
 } from '../src';
 
+jest.setTimeout(7 * 1000);
+
 async function expectBuilderError(promise: Promise<any>, pattern: string) {
   let result;
   try {

packages/cli/package.json

@@ -97,6 +97,7 @@
     "@types/yauzl-promise": "2.1.0",
     "@vercel/client": "12.0.3",
     "@vercel/frameworks": "1.0.2",
+    "@vercel/fs-detectors": "0.0.0",
     "@vercel/ncc": "0.24.0",
     "@zeit/fun": "0.11.2",
     "@zeit/source-map-support": "0.6.2",

packages/cli/src/commands/build.ts

@@ -3,7 +3,6 @@ import chalk from 'chalk';
 import dotenv from 'dotenv';
 import { join, normalize, relative, resolve } from 'path';
 import {
-  detectBuilders,
   normalizePath,
   Files,
   FileFsRef,
@@ -17,6 +16,7 @@ import {
   BuildResultV3,
   NowBuildError,
 } from '@vercel/build-utils';
+import { detectBuilders } from '@vercel/fs-detectors';
 import minimatch from 'minimatch';
 import {
   appendRoutesToPhase,

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

@@ -13,8 +13,8 @@ import {
   Lambda,
   FileBlob,
   FileFsRef,
-  isOfficialRuntime,
 } from '@vercel/build-utils';
+import { isOfficialRuntime } from '@vercel/fs-detectors';
 import plural from 'pluralize';
 import minimatch from 'minimatch';
 

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

@@ -36,12 +36,14 @@ import {
   StartDevServerResult,
   FileFsRef,
   PackageJson,
+  spawnCommand,
+} from '@vercel/build-utils';
+import {
   detectBuilders,
   detectApiDirectory,
   detectApiExtensions,
-  spawnCommand,
   isOfficialRuntime,
-} from '@vercel/build-utils';
+} from '@vercel/fs-detectors';
 import frameworkList from '@vercel/frameworks';
 
 import cmd from '../output/cmd';

packages/client/package.json

@@ -43,6 +43,7 @@
   },
   "dependencies": {
     "@vercel/build-utils": "4.2.1",
+    "@vercel/routing-utils": "1.13.5",
     "@zeit/fetch": "5.2.0",
     "async-retry": "1.2.3",
     "async-sema": "3.0.0",

packages/client/src/types.ts

@@ -1,9 +1,9 @@
-import {
+import type {
   Builder,
   BuilderFunctions,
   ProjectSettings,
 } from '@vercel/build-utils';
-import { Header, Route, Redirect, Rewrite } from '@vercel/routing-utils';
+import type { Header, Route, Redirect, Rewrite } from '@vercel/routing-utils';
 
 export { DeploymentEventType } from './utils';
 

packages/fs-detectors/.gitignore

@@ -0,0 +1 @@
+/dist

packages/fs-detectors/jest.config.js

@@ -0,0 +1,5 @@
+/** @type {import('@ts-jest/dist/types').InitialOptionsTsJest} */
+module.exports = {
+  preset: 'ts-jest',
+  testEnvironment: 'node',
+};

packages/fs-detectors/package.json

@@ -0,0 +1,40 @@
+{
+  "name": "@vercel/fs-detectors",
+  "version": "0.0.0",
+  "description": "Vercel filesystem detectors",
+  "main": "./dist/index.js",
+  "types": "./dist/index.d.ts",
+  "files": [
+    "dist"
+  ],
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/vercel/vercel.git",
+    "directory": "packages/fs-detectors"
+  },
+  "license": "MIT",
+  "scripts": {
+    "prepublishOnly": "tsc",
+    "build": "tsc",
+    "test": "yarn jest --env node --verbose --runInBand --bail test/unit.*test.*",
+    "test-unit": "yarn test"
+  },
+  "dependencies": {
+    "@vercel/frameworks": "1.0.2",
+    "@vercel/routing-utils": "1.13.5",
+    "glob": "8.0.3",
+    "js-yaml": "4.1.0",
+    "minimatch": "3.0.4",
+    "semver": "6.1.1"
+  },
+  "devDependencies": {
+    "@types/glob": "7.2.0",
+    "@types/jest": "27.5.1",
+    "@types/js-yaml": "4.0.5",
+    "@types/minimatch": "3.0.5",
+    "@types/node": "12.12.20",
+    "@types/semver": "7.3.10",
+    "@vercel/build-utils": "4.2.0",
+    "typescript": "4.3.4"
+  }
+}

packages/fs-detectors/src/detect-builders.ts

@@ -1,16 +1,16 @@
 import minimatch from 'minimatch';
 import { valid as validSemver } from 'semver';
 import { parse as parsePath, extname } from 'path';
-import { Route, Source } from '@vercel/routing-utils';
+import type { Route, Source } from '@vercel/routing-utils';
 import frameworkList, { Framework } from '@vercel/frameworks';
-import {
+import type {
   PackageJson,
   Builder,
   Config,
   BuilderFunctions,
   ProjectSettings,
-} from './types';
-import { isOfficialRuntime } from './';
+} from '@vercel/build-utils';
+import { isOfficialRuntime } from './is-official-runtime';
 const slugToFramework = new Map<string | null, Framework>(
   frameworkList.map(f => [f.slug, f])
 );

packages/fs-detectors/src/detect-file-system-api.ts

@@ -5,7 +5,7 @@ import type {
   BuilderFunctions,
   PackageJson,
   ProjectSettings,
-} from './types';
+} from '@vercel/build-utils';
 
 interface Metadata {
   plugins: string[];

packages/fs-detectors/src/detect-framework.ts

@@ -1,4 +1,4 @@
-import { Framework, FrameworkDetectionItem } from '@vercel/frameworks';
+import type { Framework, FrameworkDetectionItem } from '@vercel/frameworks';
 import { DetectorFilesystem } from './detectors/filesystem';
 
 interface BaseFramework {

packages/fs-detectors/src/index.ts

@@ -0,0 +1,23 @@
+export {
+  detectBuilders,
+  detectOutputDirectory,
+  detectApiDirectory,
+  detectApiExtensions,
+} from './detect-builders';
+export { detectFileSystemAPI } from './detect-file-system-api';
+export { detectFramework } from './detect-framework';
+export { getProjectPaths } from './get-project-paths';
+export { DetectorFilesystem } from './detectors/filesystem';
+export { workspaceManagers } from './workspaces/workspace-managers';
+export {
+  getWorkspaces,
+  GetWorkspaceOptions,
+  Workspace,
+  WorkspaceType,
+} from './workspaces/get-workspaces';
+export {
+  getWorkspacePackagePaths,
+  GetWorkspacePackagePathsOptions,
+} from './workspaces/get-workspace-package-paths';
+export { monorepoManagers } from './monorepos/monorepo-managers';
+export { isOfficialRuntime, isStaticRuntime } from './is-official-runtime';

packages/fs-detectors/src/is-official-runtime.ts

@@ -0,0 +1,21 @@
+/*
+ * Helper function to support both `@vercel` and legacy `@now` official Runtimes.
+ */
+export const isOfficialRuntime = (desired: string, name?: string): boolean => {
+  if (typeof name !== 'string') {
+    return false;
+  }
+  return (
+    name === `@vercel/${desired}` ||
+    name === `@now/${desired}` ||
+    name.startsWith(`@vercel/${desired}@`) ||
+    name.startsWith(`@now/${desired}@`)
+  );
+};
+
+/*
+ * Helper function to detect both `@vercel/static` and legacy `@now/static` official Runtimes.
+ */
+export const isStaticRuntime = (name?: string): boolean => {
+  return isOfficialRuntime('static', name);
+};

packages/fs-detectors/src/monorepos/monorepo-managers.ts

@@ -6,8 +6,8 @@ import type { Framework } from '@vercel/frameworks';
  * This list is designed to work with the @see {@link detectFramework} function.
  *
  * @example
- *   import { monorepoManagers as frameworkList } from '@vercel/build-utils'
- *   import { detectFramework } from '@vercel/build-utils'
+ *   import { monorepoManagers as frameworkList } from '@vercel/fs-detectors'
+ *   import { detectFramework } from '@vercel/fs-detectors'
  *
  *   const fs = new GitDetectorFilesystem(...)
  *   detectFramwork({ fs, frameworkList }) // returns the 'slug' field if detected, otherwise null

packages/fs-detectors/src/workspaces/get-glob-fs.ts

@@ -3,7 +3,7 @@ import { DetectorFilesystem } from '../detectors/filesystem';
 
 type GlobFs = typeof fs;
 
-function normalizePath(path: string) {
+function removeWindowsPrefix(path: string) {
   // on windows, this will return a path like
   // D:/c/package.json
   // since we abstract the filesystem, we need to remove windows specific info from the path
@@ -18,7 +18,7 @@ export function getGlobFs(_fs: DetectorFilesystem): GlobFs {
     callback: (err: NodeJS.ErrnoException | null, files: string[]) => void
   ): void => {
     _fs
-      .readdir(normalizePath(String(path)))
+      .readdir(removeWindowsPrefix(String(path)))
       .then(stats =>
         callback(
           null,
@@ -36,7 +36,7 @@ export function getGlobFs(_fs: DetectorFilesystem): GlobFs {
     ) => void
   ): void => {
     _fs
-      .isFile(normalizePath(String(path)))
+      .isFile(removeWindowsPrefix(String(path)))
       .then(isPathAFile => {
         callback(null, {
           ino: 0,

packages/fs-detectors/src/workspaces/get-workspace-package-paths.ts

@@ -3,8 +3,7 @@ import yaml from 'js-yaml';
 import glob from 'glob';
 import { DetectorFilesystem } from '../detectors/filesystem';
 import { Workspace } from './get-workspaces';
-import { getGlobFs } from '../fs/get-glob-fs';
-import { normalizePath } from '../fs/normalize-path';
+import { getGlobFs } from './get-glob-fs';
 
 const posixPath = _path.posix;
 
@@ -56,6 +55,9 @@ type PnpmWorkspaces = {
   packages?: string[];
 };
 
+const isWin = process.platform === 'win32';
+const normalizePath = (p: string) => (isWin ? p.replace(/\\/g, '/') : p);
+
 async function getPackagePaths(
   packages: string[],
   fs: DetectorFilesystem

packages/fs-detectors/src/workspaces/get-workspaces.ts

@@ -36,7 +36,7 @@ export async function getWorkspaces({
     const childDirectories = directoryContents.filter(
       stat => stat.type === 'dir'
     );
-    
+
     return (
       await Promise.all(
         childDirectories.map(childDirectory =>

packages/fs-detectors/src/workspaces/workspace-managers.ts

@@ -6,8 +6,8 @@ import type { Framework } from '@vercel/frameworks';
  * This list is designed to work with the @see {@link detectFramework} function.
  *
  * @example
- *   import { workspaceManagers as frameworkList } from '@vercel/build-utils'
- *   import { detectFramework } from '@vercel/build-utils'
+ *   import { workspaceManagers as frameworkList } from '@vercel/fs-detectors'
+ *   import { detectFramework } from '@vercel/fs-detectors'
  *
  *   const fs = new GitDetectorFilesystem(...)
  *   detectFramwork({ fs, frameworkList }) // returns the 'slug' field if detected, otherwise null

packages/fs-detectors/test/fixtures/02-zero-config-api/.gitignore

@@ -0,0 +1 @@
+now.json

packages/fs-detectors/test/fixtures/02-zero-config-api/api/date.js

@@ -0,0 +1,3 @@
+module.exports = (req, res) => {
+  res.end('hello from api/date.js');
+};

packages/fs-detectors/test/fixtures/02-zero-config-api/api/date/index.js

@@ -0,0 +1,3 @@
+module.exports = (req, res) => {
+  res.end('hello from api/date/index.js');
+};

packages/fs-detectors/test/fixtures/02-zero-config-api/api/index.js

@@ -0,0 +1,3 @@
+module.exports = (req, res) => {
+  res.end('hello from api/index.js');
+};

packages/fs-detectors/test/fixtures/02-zero-config-api/package.json

@@ -0,0 +1,5 @@
+{
+  "scripts": {
+    "build": "mkdir -p public && echo 'hello from index.txt' > public/index.txt"
+  }
+}

packages/fs-detectors/test/fixtures/02-zero-config-api/yarn.lock

@@ -0,0 +1,4 @@
+# THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY.
+# yarn lockfile v1
+
+

packages/fs-detectors/test/fixtures/21-npm-workspaces/package-lock.json

@@ -0,0 +1,782 @@
+{
+  "name": "21-npm-workspaces",
+  "version": "1.0.0",
+  "lockfileVersion": 2,
+  "requires": true,
+  "packages": {
+    "": {
+      "version": "1.0.0",
+      "workspaces": [
+        "a",
+        "b"
+      ]
+    },
+    "a": {
+      "version": "1.0.0",
+      "license": "ISC",
+      "dependencies": {
+        "debug": "^4.3.2"
+      }
+    },
+    "b": {
+      "version": "1.0.0",
+      "license": "ISC",
+      "dependencies": {
+        "cowsay": "^1.5.0"
+      }
+    },
+    "node_modules/a": {
+      "resolved": "a",
+      "link": true
+    },
+    "node_modules/ansi-regex": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-3.0.0.tgz",
+      "integrity": "sha1-7QMXwyIGT3lGbAKWa922Bas32Zg=",
+      "engines": {
+        "node": ">=4"
+      }
+    },
+    "node_modules/ansi-styles": {
+      "version": "4.3.0",
+      "resolved": "https://registry.npmjs.org/ansi-styles/-/ansi-styles-4.3.0.tgz",
+      "integrity": "sha512-zbB9rCJAT1rbjiVDb2hqKFHNYLxgtk8NURxZ3IZwD3F6NtxbXZQCnnSi1Lkx+IDohdPlFp222wVALIheZJQSEg==",
+      "dependencies": {
+        "color-convert": "^2.0.1"
+      },
+      "engines": {
+        "node": ">=8"
+      },
+      "funding": {
+        "url": "https://github.com/chalk/ansi-styles?sponsor=1"
+      }
+    },
+    "node_modules/b": {
+      "resolved": "b",
+      "link": true
+    },
+    "node_modules/camelcase": {
+      "version": "5.3.1",
+      "resolved": "https://registry.npmjs.org/camelcase/-/camelcase-5.3.1.tgz",
+      "integrity": "sha512-L28STB170nwWS63UjtlEOE3dldQApaJXZkOI1uMFfzf3rRuPegHaHesyee+YxQ+W6SvRDQV6UrdOdRiR153wJg==",
+      "engines": {
+        "node": ">=6"
+      }
+    },
+    "node_modules/cliui": {
+      "version": "6.0.0",
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+            "is-fullwidth-code-point": "^3.0.0",
+            "strip-ansi": "^6.0.0"
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+          "version": "6.0.0",
+          "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-6.0.0.tgz",
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+          "requires": {
+            "ansi-regex": "^5.0.0"
+          }
+        }
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+    },
+    "yargs-parser": {
+      "version": "18.1.3",
+      "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-18.1.3.tgz",
+      "integrity": "sha512-o50j0JeToy/4K6OZcaQmW6lyXXKhq7csREXcDwk2omFPJEwUNOVtJKvmDr9EI1fAJZUyZcRF7kxGBWmRXudrCQ==",
+      "requires": {
+        "camelcase": "^5.0.0",
+        "decamelize": "^1.2.0"
+      }
+    }
+  }
+}

packages/fs-detectors/test/fixtures/21-npm-workspaces/package.json

@@ -0,0 +1,8 @@
+{
+  "name": "21-npm-workspaces",
+  "version": "1.0.0",
+  "workspaces": [
+    "a",
+    "b"
+  ]
+}

packages/fs-detectors/test/fixtures/22-pnpm/package.json

@@ -0,0 +1,15 @@
+{
+  "name": "22-pnpm",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "build": "mkdir -p public && (printf \"pnpm version: \" && pnpm -v) > public/index.txt"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "once": "^1.4.0"
+  }
+}

packages/fs-detectors/test/fixtures/22-pnpm/pnpm-lock.yaml

@@ -0,0 +1,19 @@
+lockfileVersion: 5.3
+
+specifiers:
+  once: ^1.4.0
+
+dependencies:
+  once: 1.4.0
+
+packages:
+
+  /once/1.4.0:
+    resolution: {integrity: sha1-WDsap3WWHUsROsF9nFC6753Xa9E=}
+    dependencies:
+      wrappy: 1.0.2
+    dev: false
+
+  /wrappy/1.0.2:
+    resolution: {integrity: sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8=}
+    dev: false

packages/fs-detectors/test/fixtures/22-pnpm/vercel.json

@@ -0,0 +1,11 @@
+{
+  "version": 2,
+  "builds": [{ "src": "package.json", "use": "@vercel/static-build" }],
+  "probes": [
+    {
+      "path": "/",
+      "mustContain": "pnpm version: 6",
+      "logMustContain": "pnpm run build"
+    }
+  ]
+}

packages/fs-detectors/test/fixtures/23-pnpm-workspaces/package.json

@@ -0,0 +1,6 @@
+{
+  "private": true,
+  "name": "23-pnpm-workspaces",
+  "license": "MIT",
+  "version": "1.0.0"
+}

packages/fs-detectors/test/fixtures/24-pnpm-hoisted/.gitignore

@@ -0,0 +1 @@
+.vercel

packages/fs-detectors/test/fixtures/24-pnpm-hoisted/.npmrc

@@ -0,0 +1 @@
+node-linker=hoisted

packages/fs-detectors/test/fixtures/24-pnpm-hoisted/a/index.js

@@ -0,0 +1,5 @@
+const once = require('once');
+
+module.exports = () => {
+  once(() => {});
+};

packages/fs-detectors/test/fixtures/24-pnpm-hoisted/b/index.js

@@ -0,0 +1,5 @@
+const once = require('once');
+
+module.exports = () => {
+  once(() => {});
+};

packages/fs-detectors/test/fixtures/24-pnpm-hoisted/index.js

@@ -0,0 +1,15 @@
+const { exec } = require('exeggcute');
+
+const a = require('./a');
+const b = require('./b');
+
+a();
+b();
+
+exec('mkdir public', __dirname)
+  .then(() => {
+    exec('echo "Hello, World!" > public/index.html', __dirname).then(() => {
+      console.log('Success');
+    });
+  })
+  .catch(console.error);

packages/fs-detectors/test/fixtures/24-pnpm-hoisted/package.json

@@ -0,0 +1,11 @@
+{
+  "private": "true",
+  "name": "24-pnpm-hoisted",
+  "scripts": {
+    "build": "ls -Al node_modules && node index.js"
+  },
+  "dependencies": {
+    "exeggcute": "^1.0.0",
+    "once": "^1.4.0"
+  }
+}

packages/fs-detectors/test/fixtures/24-pnpm-hoisted/pnpm-lock.yaml

@@ -0,0 +1,25 @@
+lockfileVersion: 5.3
+
+specifiers:
+  exeggcute: ^1.0.0
+  once: ^1.4.0
+
+dependencies:
+  exeggcute: 1.0.0
+  once: 1.4.0
+
+packages:
+
+  /exeggcute/1.0.0:
+    resolution: {integrity: sha1-qLXakIhjGCDm9ggx4CvEc5mnbBU=}
+    dev: false
+
+  /once/1.4.0:
+    resolution: {integrity: sha1-WDsap3WWHUsROsF9nFC6753Xa9E=}
+    dependencies:
+      wrappy: 1.0.2
+    dev: false
+
+  /wrappy/1.0.2:
+    resolution: {integrity: sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8=}
+    dev: false

packages/fs-detectors/test/fixtures/24-pnpm-hoisted/vercel.json

@@ -0,0 +1,20 @@
+{
+  "probes": [
+    {
+      "path": "/",
+      "mustContain": "Hello, World!"
+    },
+    {
+      "path": "/",
+      "logMustContain": "once"
+    },
+    {
+      "path": "/",
+      "logMustContain": "exeggcute"
+    },
+    {
+      "path": "/",
+      "logMustContain": "wrappy"
+    }
+  ]
+}

packages/fs-detectors/test/fixtures/25-multiple-lock-files-yarn/package.json

@@ -0,0 +1,14 @@
+{
+  "private": "true",
+  "name": "25-multiple-lock-files-yarn",
+  "workspaces": [
+    "a",
+    "b"
+  ],
+  "scripts": {
+    "build": "mkdir -p public && (printf \"yarn version: \" && yarn -v) > public/index.txt"
+  },
+  "dependencies": {
+    "once": "^1.4.0"
+  }
+}

packages/fs-detectors/test/fixtures/25-multiple-lock-files-yarn/pnpm-lock.yaml

@@ -0,0 +1,19 @@
+lockfileVersion: 5.3
+
+specifiers:
+  once: ^1.4.0
+
+dependencies:
+  once: 1.4.0
+
+packages:
+
+  /once/1.4.0:
+    resolution: {integrity: sha1-WDsap3WWHUsROsF9nFC6753Xa9E=}
+    dependencies:
+      wrappy: 1.0.2
+    dev: false
+
+  /wrappy/1.0.2:
+    resolution: {integrity: sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8=}
+    dev: false

packages/fs-detectors/test/fixtures/25-multiple-lock-files-yarn/vercel.json

@@ -0,0 +1,11 @@
+{
+  "version": 2,
+  "builds": [{ "src": "package.json", "use": "@vercel/static-build" }],
+  "probes": [
+    {
+      "path": "/",
+      "mustContain": "yarn version: 1",
+      "logMustContain": "yarn run build"
+    }
+  ]
+}

packages/fs-detectors/test/fixtures/25-multiple-lock-files-yarn/yarn.lock

@@ -0,0 +1,15 @@
+# THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY.
+# yarn lockfile v1
+
+
+once@^1.4.0:
+  version "1.4.0"
+  resolved "https://registry.yarnpkg.com/once/-/once-1.4.0.tgz#583b1aa775961d4b113ac17d9c50baef9dd76bd1"
+  integrity sha1-WDsap3WWHUsROsF9nFC6753Xa9E=
+  dependencies:
+    wrappy "1"
+
+wrappy@1:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/wrappy/-/wrappy-1.0.2.tgz#b5243d8f3ec1aa35f1364605bc0d1036e30ab69f"
+  integrity sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8=

packages/fs-detectors/test/fixtures/26-multiple-lock-files-pnpm/package-lock.json

@@ -0,0 +1,44 @@
+{
+  "name": "26-multiple-lock-files-pnpm",
+  "version": "1.0.0",
+  "lockfileVersion": 2,
+  "requires": true,
+  "packages": {
+    "": {
+      "name": "26-multiple-lock-files-pnpm",
+      "version": "1.0.0",
+      "license": "ISC",
+      "dependencies": {
+        "once": "^1.4.0"
+      }
+    },
+    "node_modules/once": {
+      "version": "1.4.0",
+      "resolved": "https://registry.npmjs.org/once/-/once-1.4.0.tgz",
+      "integrity": "sha1-WDsap3WWHUsROsF9nFC6753Xa9E=",
+      "dependencies": {
+        "wrappy": "1"
+      }
+    },
+    "node_modules/wrappy": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
+      "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8="
+    }
+  },
+  "dependencies": {
+    "once": {
+      "version": "1.4.0",
+      "resolved": "https://registry.npmjs.org/once/-/once-1.4.0.tgz",
+      "integrity": "sha1-WDsap3WWHUsROsF9nFC6753Xa9E=",
+      "requires": {
+        "wrappy": "1"
+      }
+    },
+    "wrappy": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
+      "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8="
+    }
+  }
+}

packages/fs-detectors/test/fixtures/26-multiple-lock-files-pnpm/package.json

@@ -0,0 +1,14 @@
+{
+  "private": "true",
+  "name": "26-multiple-lock-files-pnpm",
+  "workspaces": [
+    "a",
+    "b"
+  ],
+  "scripts": {
+    "build": "mkdir -p public && (printf \"pnpm version: \" && pnpm -v) > public/index.txt"
+  },
+  "dependencies": {
+    "once": "^1.4.0"
+  }
+}

packages/fs-detectors/test/fixtures/26-multiple-lock-files-pnpm/pnpm-lock.yaml

@@ -0,0 +1,260 @@
+lockfileVersion: 5.4
+
+importers:
+
+  .:
+    specifiers:
+      once: ^1.4.0
+    dependencies:
+      once: 1.4.0
+
+  a:
+    specifiers:
+      debug: ^4.3.2
+    dependencies:
+      debug: 4.3.4
+
+  b:
+    specifiers:
+      cowsay: ^1.5.0
+    dependencies:
+      cowsay: 1.5.0
+
+packages:
+
+  /ansi-regex/3.0.1:
+    resolution: {integrity: sha512-+O9Jct8wf++lXxxFc4hc8LsjaSq0HFzzL7cVsw8pRDIPdjKD2mT4ytDZlLuSBZ4cLKZFXIrMGO7DbQCtMJJMKw==}
+    engines: {node: '>=4'}
+    dev: false
+
+  /ansi-regex/5.0.1:
+    resolution: {integrity: sha512-quJQXlTSUGL2LH9SUXo8VwsY4soanhgo6LNSm84E1LBcE8s3O0wpdiRzyR9z/ZZJMlMWv37qOOb9pdJlMUEKFQ==}
+    engines: {node: '>=8'}
+    dev: false
+
+  /ansi-styles/4.3.0:
+    resolution: {integrity: sha512-zbB9rCJAT1rbjiVDb2hqKFHNYLxgtk8NURxZ3IZwD3F6NtxbXZQCnnSi1Lkx+IDohdPlFp222wVALIheZJQSEg==}
+    engines: {node: '>=8'}
+    dependencies:
+      color-convert: 2.0.1
+    dev: false
+
+  /camelcase/5.3.1:
+    resolution: {integrity: sha512-L28STB170nwWS63UjtlEOE3dldQApaJXZkOI1uMFfzf3rRuPegHaHesyee+YxQ+W6SvRDQV6UrdOdRiR153wJg==}
+    engines: {node: '>=6'}
+    dev: false
+
+  /cliui/6.0.0:
+    resolution: {integrity: sha512-t6wbgtoCXvAzst7QgXxJYqPt0usEfbgQdftEPbLL/cvv6HPE5VgvqCuAIDR0NgU52ds6rFwqrgakNLrHEjCbrQ==}
+    dependencies:
+      string-width: 4.2.3
+      strip-ansi: 6.0.1
+      wrap-ansi: 6.2.0
+    dev: false
+
+  /color-convert/2.0.1:
+    resolution: {integrity: sha512-RRECPsj7iu/xb5oKYcsFHSppFNnsj/52OVTRKb4zP5onXwVF3zVmmToNcOfGC+CRDpfK/U584fMg38ZHCaElKQ==}
+    engines: {node: '>=7.0.0'}
+    dependencies:
+      color-name: 1.1.4
+    dev: false
+
+  /color-name/1.1.4:
+    resolution: {integrity: sha512-dOy+3AuW3a2wNbZHIuMZpTcgjGuLU/uBL/ubcZF9OXbDo8ff4O8yVp5Bf0efS8uEoYo5q4Fx7dY9OgQGXgAsQA==}
+    dev: false
+
+  /cowsay/1.5.0:
+    resolution: {integrity: sha512-8Ipzr54Z8zROr/62C8f0PdhQcDusS05gKTS87xxdji8VbWefWly0k8BwGK7+VqamOrkv3eGsCkPtvlHzrhWsCA==}
+    engines: {node: '>= 4'}
+    hasBin: true
+    dependencies:
+      get-stdin: 8.0.0
+      string-width: 2.1.1
+      strip-final-newline: 2.0.0
+      yargs: 15.4.1
+    dev: false
+
+  /debug/4.3.4:
+    resolution: {integrity: sha512-PRWFHuSU3eDtQJPvnNY7Jcket1j0t5OuOsFzPPzsekD52Zl8qUfFIPEiswXqIvHWGVHOgX+7G/vCNNhehwxfkQ==}
+    engines: {node: '>=6.0'}
+    peerDependencies:
+      supports-color: '*'
+    peerDependenciesMeta:
+      supports-color:
+        optional: true
+    dependencies:
+      ms: 2.1.2
+    dev: false
+
+  /decamelize/1.2.0:
+    resolution: {integrity: sha512-z2S+W9X73hAUUki+N+9Za2lBlun89zigOyGrsax+KUQ6wKW4ZoWpEYBkGhQjwAjjDCkWxhY0VKEhk8wzY7F5cA==}
+    engines: {node: '>=0.10.0'}
+    dev: false
+
+  /emoji-regex/8.0.0:
+    resolution: {integrity: sha512-MSjYzcWNOA0ewAHpz0MxpYFvwg6yjy1NG3xteoqz644VCo/RPgnr1/GGt+ic3iJTzQ8Eu3TdM14SawnVUmGE6A==}
+    dev: false
+
+  /find-up/4.1.0:
+    resolution: {integrity: sha512-PpOwAdQ/YlXQ2vj8a3h8IipDuYRi3wceVQQGYWxNINccq40Anw7BlsEXCMbt1Zt+OLA6Fq9suIpIWD0OsnISlw==}
+    engines: {node: '>=8'}
+    dependencies:
+      locate-path: 5.0.0
+      path-exists: 4.0.0
+    dev: false
+
+  /get-caller-file/2.0.5:
+    resolution: {integrity: sha512-DyFP3BM/3YHTQOCUL/w0OZHR0lpKeGrxotcHWcqNEdnltqFwXVfhEBQ94eIo34AfQpo0rGki4cyIiftY06h2Fg==}
+    engines: {node: 6.* || 8.* || >= 10.*}
+    dev: false
+
+  /get-stdin/8.0.0:
+    resolution: {integrity: sha512-sY22aA6xchAzprjyqmSEQv4UbAAzRN0L2dQB0NlN5acTTK9Don6nhoc3eAbUnpZiCANAMfd/+40kVdKfFygohg==}
+    engines: {node: '>=10'}
+    dev: false
+
+  /is-fullwidth-code-point/2.0.0:
+    resolution: {integrity: sha512-VHskAKYM8RfSFXwee5t5cbN5PZeq1Wrh6qd5bkyiXIf6UQcN6w/A0eXM9r6t8d+GYOh+o6ZhiEnb88LN/Y8m2w==}
+    engines: {node: '>=4'}
+    dev: false
+
+  /is-fullwidth-code-point/3.0.0:
+    resolution: {integrity: sha512-zymm5+u+sCsSWyD9qNaejV3DFvhCKclKdizYaJUuHA83RLjb7nSuGnddCHGv0hk+KY7BMAlsWeK4Ueg6EV6XQg==}
+    engines: {node: '>=8'}
+    dev: false
+
+  /locate-path/5.0.0:
+    resolution: {integrity: sha512-t7hw9pI+WvuwNJXwk5zVHpyhIqzg2qTlklJOf0mVxGSbe3Fp2VieZcduNYjaLDoy6p9uGpQEGWG87WpMKlNq8g==}
+    engines: {node: '>=8'}
+    dependencies:
+      p-locate: 4.1.0
+    dev: false
+
+  /ms/2.1.2:
+    resolution: {integrity: sha512-sGkPx+VjMtmA6MX27oA4FBFELFCZZ4S4XqeGOXCv68tT+jb3vk/RyaKWP0PTKyWtmLSM0b+adUTEvbs1PEaH2w==}
+    dev: false
+
+  /once/1.4.0:
+    resolution: {integrity: sha1-WDsap3WWHUsROsF9nFC6753Xa9E=}
+    dependencies:
+      wrappy: 1.0.2
+    dev: false
+
+  /p-limit/2.3.0:
+    resolution: {integrity: sha512-//88mFWSJx8lxCzwdAABTJL2MyWB12+eIY7MDL2SqLmAkeKU9qxRvWuSyTjm3FUmpBEMuFfckAIqEaVGUDxb6w==}
+    engines: {node: '>=6'}
+    dependencies:
+      p-try: 2.2.0
+    dev: false
+
+  /p-locate/4.1.0:
+    resolution: {integrity: sha512-R79ZZ/0wAxKGu3oYMlz8jy/kbhsNrS7SKZ7PxEHBgJ5+F2mtFW2fK2cOtBh1cHYkQsbzFV7I+EoRKe6Yt0oK7A==}
+    engines: {node: '>=8'}
+    dependencies:
+      p-limit: 2.3.0
+    dev: false
+
+  /p-try/2.2.0:
+    resolution: {integrity: sha512-R4nPAVTAU0B9D35/Gk3uJf/7XYbQcyohSKdvAxIRSNghFl4e71hVoGnBNQz9cWaXxO2I10KTC+3jMdvvoKw6dQ==}
+    engines: {node: '>=6'}
+    dev: false
+
+  /path-exists/4.0.0:
+    resolution: {integrity: sha512-ak9Qy5Q7jYb2Wwcey5Fpvg2KoAc/ZIhLSLOSBmRmygPsGwkVVt0fZa0qrtMz+m6tJTAHfZQ8FnmB4MG4LWy7/w==}
+    engines: {node: '>=8'}
+    dev: false
+
+  /require-directory/2.1.1:
+    resolution: {integrity: sha1-jGStX9MNqxyXbiNE/+f3kqam30I=}
+    engines: {node: '>=0.10.0'}
+    dev: false
+
+  /require-main-filename/2.0.0:
+    resolution: {integrity: sha512-NKN5kMDylKuldxYLSUfrbo5Tuzh4hd+2E8NPPX02mZtn1VuREQToYe/ZdlJy+J3uCpfaiGF05e7B8W0iXbQHmg==}
+    dev: false
+
+  /set-blocking/2.0.0:
+    resolution: {integrity: sha1-BF+XgtARrppoA93TgrJDkrPYkPc=}
+    dev: false
+
+  /string-width/2.1.1:
+    resolution: {integrity: sha512-nOqH59deCq9SRHlxq1Aw85Jnt4w6KvLKqWVik6oA9ZklXLNIOlqg4F2yrT1MVaTjAqvVwdfeZ7w7aCvJD7ugkw==}
+    engines: {node: '>=4'}
+    dependencies:
+      is-fullwidth-code-point: 2.0.0
+      strip-ansi: 4.0.0
+    dev: false
+
+  /string-width/4.2.3:
+    resolution: {integrity: sha512-wKyQRQpjJ0sIp62ErSZdGsjMJWsap5oRNihHhu6G7JVO/9jIB6UyevL+tXuOqrng8j/cxKTWyWUwvSTriiZz/g==}
+    engines: {node: '>=8'}
+    dependencies:
+      emoji-regex: 8.0.0
+      is-fullwidth-code-point: 3.0.0
+      strip-ansi: 6.0.1
+    dev: false
+
+  /strip-ansi/4.0.0:
+    resolution: {integrity: sha1-qEeQIusaw2iocTibY1JixQXuNo8=}
+    engines: {node: '>=4'}
+    dependencies:
+      ansi-regex: 3.0.1
+    dev: false
+
+  /strip-ansi/6.0.1:
+    resolution: {integrity: sha512-Y38VPSHcqkFrCpFnQ9vuSXmquuv5oXOKpGeT6aGrr3o3Gc9AlVa6JBfUSOCnbxGGZF+/0ooI7KrPuUSztUdU5A==}
+    engines: {node: '>=8'}
+    dependencies:
+      ansi-regex: 5.0.1
+    dev: false
+
+  /strip-final-newline/2.0.0:
+    resolution: {integrity: sha512-BrpvfNAE3dcvq7ll3xVumzjKjZQ5tI1sEUIKr3Uoks0XUl45St3FlatVqef9prk4jRDzhW6WZg+3bk93y6pLjA==}
+    engines: {node: '>=6'}
+    dev: false
+
+  /which-module/2.0.0:
+    resolution: {integrity: sha1-2e8H3Od7mQK4o6j6SzHD4/fm6Ho=}
+    dev: false
+
+  /wrap-ansi/6.2.0:
+    resolution: {integrity: sha512-r6lPcBGxZXlIcymEu7InxDMhdW0KDxpLgoFLcguasxCaJ/SOIZwINatK9KY/tf+ZrlywOKU0UDj3ATXUBfxJXA==}
+    engines: {node: '>=8'}
+    dependencies:
+      ansi-styles: 4.3.0
+      string-width: 4.2.3
+      strip-ansi: 6.0.1
+    dev: false
+
+  /wrappy/1.0.2:
+    resolution: {integrity: sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8=}
+    dev: false
+
+  /y18n/4.0.3:
+    resolution: {integrity: sha512-JKhqTOwSrqNA1NY5lSztJ1GrBiUodLMmIZuLiDaMRJ+itFd+ABVE8XBjOvIWL+rSqNDC74LCSFmlb/U4UZ4hJQ==}
+    dev: false
+
+  /yargs-parser/18.1.3:
+    resolution: {integrity: sha512-o50j0JeToy/4K6OZcaQmW6lyXXKhq7csREXcDwk2omFPJEwUNOVtJKvmDr9EI1fAJZUyZcRF7kxGBWmRXudrCQ==}
+    engines: {node: '>=6'}
+    dependencies:
+      camelcase: 5.3.1
+      decamelize: 1.2.0
+    dev: false
+
+  /yargs/15.4.1:
+    resolution: {integrity: sha512-aePbxDmcYW++PaqBsJ+HYUFwCdv4LVvdnhBy78E57PIor8/OVvhMrADFFEDh8DHDFRv/O9i3lPhsENjO7QX0+A==}
+    engines: {node: '>=8'}
+    dependencies:
+      cliui: 6.0.0
+      decamelize: 1.2.0
+      find-up: 4.1.0
+      get-caller-file: 2.0.5
+      require-directory: 2.1.1
+      require-main-filename: 2.0.0
+      set-blocking: 2.0.0
+      string-width: 4.2.3
+      which-module: 2.0.0
+      y18n: 4.0.3
+      yargs-parser: 18.1.3
+    dev: false

packages/fs-detectors/test/fixtures/26-multiple-lock-files-pnpm/pnpm-workspace.yaml

@@ -0,0 +1,3 @@
+packages:
+  - 'a'
+  - 'b'

packages/fs-detectors/test/fixtures/26-multiple-lock-files-pnpm/vercel.json

@@ -0,0 +1,11 @@
+{
+  "version": 2,
+  "builds": [{ "src": "package.json", "use": "@vercel/static-build" }],
+  "probes": [
+    {
+      "path": "/",
+      "mustContain": "pnpm version: 6",
+      "logMustContain": "pnpm run build"
+    }
+  ]
+}