feat: add rootPath for monorepo setups

.gitignore

@@ -3,6 +3,7 @@
 npm-debug.log
 node_modules
 !test/fixtures/**/node_modules
+**/.netlify/edge-functions-serve
 /core
 .eslintcache
 .npmrc

node/bundler.test.ts

@@ -472,6 +472,44 @@ test('Loads npm modules from bare specifiers', async () => {
   await rm(vendorDirectory.path, { force: true, recursive: true })
 })
 
+test('Loads npm modules in a monorepo setup', async () => {
+  const systemLogger = vi.fn()
+  const { basePath: rootPath, cleanup, distPath } = await useFixture('monorepo_npm_module')
+  const basePath = join(rootPath, 'packages', 'frontend')
+  const sourceDirectory = join(basePath, 'functions')
+  const declarations: Declaration[] = [
+    {
+      function: 'func1',
+      path: '/func1',
+    },
+  ]
+  const vendorDirectory = await tmp.dir()
+
+  await bundle([sourceDirectory], distPath, declarations, {
+    basePath,
+    importMapPaths: [join(basePath, 'import_map.json')],
+    rootPath,
+    vendorDirectory: vendorDirectory.path,
+    systemLogger,
+  })
+
+  expect(
+    systemLogger.mock.calls.find((call) => call[0] === 'Could not track dependencies in edge function:'),
+  ).toBeUndefined()
+
+  const manifestFile = await readFile(resolve(distPath, 'manifest.json'), 'utf8')
+  const manifest = JSON.parse(manifestFile)
+  const bundlePath = join(distPath, manifest.bundles[0].asset)
+  const { func1 } = await runESZIP(bundlePath, vendorDirectory.path)
+
+  expect(func1).toBe(
+    `<parent-1><child-1>JavaScript</child-1></parent-1>, <parent-2><child-2><grandchild-1>APIs<cwd>${process.cwd()}</cwd></grandchild-1></child-2></parent-2>, <parent-3><child-2><grandchild-1>Markup<cwd>${process.cwd()}</cwd></grandchild-1></child-2></parent-3>`,
+  )
+
+  await cleanup()
+  await rm(vendorDirectory.path, { force: true, recursive: true })
+})
+
 test('Loads JSON modules', async () => {
   const { basePath, cleanup, distPath } = await useFixture('imports_json')
   const sourceDirectory = join(basePath, 'functions')

node/bundler.ts

@@ -33,6 +33,7 @@ export interface BundleOptions {
   internalSrcFolder?: string
   onAfterDownload?: OnAfterDownloadHook
   onBeforeDownload?: OnBeforeDownloadHook
+  rootPath?: string
   systemLogger?: LogFunction
   userLogger?: LogFunction
   vendorDirectory?: string
@@ -53,6 +54,7 @@ export const bundle = async (
     internalSrcFolder,
     onAfterDownload,
     onBeforeDownload,
+    rootPath,
     userLogger,
     systemLogger,
     vendorDirectory,
@@ -105,6 +107,7 @@ export const bundle = async (
     functions,
     importMap,
     logger,
+    rootPath: rootPath ?? basePath,
     vendorDirectory,
   })
 
@@ -250,6 +253,7 @@ interface VendorNPMOptions {
   functions: EdgeFunction[]
   importMap: ImportMap
   logger: Logger
+  rootPath: string
   vendorDirectory: string | undefined
 }
 
@@ -258,6 +262,7 @@ const safelyVendorNPMSpecifiers = async ({
   functions,
   importMap,
   logger,
+  rootPath,
   vendorDirectory,
 }: VendorNPMOptions) => {
   try {
@@ -268,6 +273,7 @@ const safelyVendorNPMSpecifiers = async ({
       importMap,
       logger,
       referenceTypes: false,
+      rootPath,
     })
   } catch (error) {
     logger.system(error)

node/npm_dependencies.ts

@@ -12,6 +12,7 @@ import tmp from 'tmp-promise'
 
 import { ImportMap } from './import_map.js'
 import { Logger } from './logger.js'
+import { pathsBetween } from './utils/fs.js'
 
 const TYPESCRIPT_EXTENSIONS = new Set(['.ts', '.cts', '.mts'])
 
@@ -89,24 +90,29 @@ const banner = {
   `,
 }
 
+interface GetNPMSpecifiersOptions {
+  basePath: string
+  functions: string[]
+  importMap: ParsedImportMap
+  referenceTypes: boolean
+  rootPath: string
+}
+
 /**
  * Parses a set of functions and returns a list of specifiers that correspond
  * to npm modules.
- *
- * @param basePath Root of the project
- * @param functions Functions to parse
- * @param importMap Import map to apply when resolving imports
- * @param referenceTypes Whether to detect typescript declarations and reference them in the output
  */
-const getNPMSpecifiers = async (
-  basePath: string,
-  functions: string[],
-  importMap: ParsedImportMap,
-  referenceTypes: boolean,
-) => {
+const getNPMSpecifiers = async ({
+  basePath,
+  functions,
+  importMap,
+  referenceTypes,
+  rootPath,
+}: GetNPMSpecifiersOptions) => {
   const baseURL = pathToFileURL(basePath)
   const { reasons } = await nodeFileTrace(functions, {
-    base: basePath,
+    base: rootPath,
+    processCwd: basePath,
     readFile: async (filePath: string) => {
       // If this is a TypeScript file, we need to compile in before we can
       // parse it.
@@ -203,6 +209,7 @@ interface VendorNPMSpecifiersOptions {
   importMap: ImportMap
   logger: Logger
   referenceTypes: boolean
+  rootPath?: string
 }
 
 export const vendorNPMSpecifiers = async ({
@@ -211,24 +218,26 @@ export const vendorNPMSpecifiers = async ({
   functions,
   importMap,
   referenceTypes,
+  rootPath = basePath,
 }: VendorNPMSpecifiersOptions) => {
   // The directories that esbuild will use when resolving Node modules. We must
   // set these manually because esbuild will be operating from a temporary
   // directory that will not live inside the project root, so the normal
   // resolution logic won't work.
-  const nodePaths = [path.join(basePath, 'node_modules')]
+  const nodePaths = pathsBetween(basePath, rootPath).map((directory) => path.join(directory, 'node_modules'))
 
   // We need to create some files on disk, which we don't want to write to the
   // project directory. If a custom directory has been specified, we use it.
   // Otherwise, create a random temporary directory.
   const temporaryDirectory = directory ? { path: directory } : await tmp.dir()
 
-  const { npmSpecifiers, npmSpecifiersWithExtraneousFiles } = await getNPMSpecifiers(
+  const { npmSpecifiers, npmSpecifiersWithExtraneousFiles } = await getNPMSpecifiers({
     basePath,
     functions,
-    importMap.getContentsWithURLObjects(),
+    importMap: importMap.getContentsWithURLObjects(),
     referenceTypes,
-  )
+    rootPath,
+  })
 
   // If we found no specifiers, there's nothing left to do here.
   if (Object.keys(npmSpecifiers).length === 0) {

node/server/server.test.ts

@@ -1,5 +1,6 @@
 import { readFile } from 'fs/promises'
 import { join } from 'path'
+import process from 'process'
 
 import getPort from 'get-port'
 import fetch from 'node-fetch'
@@ -105,3 +106,65 @@ test('Starts a server and serves requests for edge functions', async () => {
     `/// <reference types="${join('..', '..', 'node_modules', '@types', 'pt-committee__identidade', 'index.d.ts')}" />`,
   )
 })
+
+test('Serves edge functions in a monorepo setup', async () => {
+  const rootPath = join(fixturesDir, 'monorepo_npm_module')
+  const basePath = join(rootPath, 'packages', 'frontend')
+  const paths = {
+    user: join(basePath, 'functions'),
+  }
+  const port = await getPort()
+  const importMapPaths = [join(basePath, 'import_map.json')]
+  const servePath = join(basePath, '.netlify', 'edge-functions-serve')
+  const server = await serve({
+    basePath,
+    bootstrapURL: 'https://edge.netlify.com/bootstrap/index-combined.ts',
+    importMapPaths,
+    port,
+    rootPath,
+    servePath,
+  })
+
+  const functions = [
+    {
+      name: 'func1',
+      path: join(paths.user, 'func1.ts'),
+    },
+  ]
+  const options = {
+    getFunctionsConfig: true,
+  }
+
+  const { features, functionsConfig, graph, success, npmSpecifiersWithExtraneousFiles } = await server(
+    functions,
+    {
+      very_secret_secret: 'i love netlify',
+    },
+    options,
+  )
+  expect(features).toEqual({ npmModules: true })
+  expect(success).toBe(true)
+  expect(functionsConfig).toEqual([{ path: '/func1' }])
+  expect(npmSpecifiersWithExtraneousFiles).toEqual(['child-1'])
+
+  for (const key in functions) {
+    const graphEntry = graph?.modules.some(
+      // @ts-expect-error TODO: Module graph is currently not typed
+      ({ kind, mediaType, local }) => kind === 'esm' && mediaType === 'TypeScript' && local === functions[key].path,
+    )
+
+    expect(graphEntry).toBe(true)
+  }
+
+  const response1 = await fetch(`http://0.0.0.0:${port}/func1`, {
+    headers: {
+      'x-nf-edge-functions': 'func1',
+      'x-ef-passthrough': 'passthrough',
+      'X-NF-Request-ID': uuidv4(),
+    },
+  })
+  expect(response1.status).toBe(200)
+  expect(await response1.text()).toBe(
+    `<parent-1><child-1>JavaScript</child-1></parent-1>, <parent-2><child-2><grandchild-1>APIs<cwd>${process.cwd()}</cwd></grandchild-1></child-2></parent-2>, <parent-3><child-2><grandchild-1>Markup<cwd>${process.cwd()}</cwd></grandchild-1></child-2></parent-3>`,
+  )
+})