fix: allow for in-source-config internal edge functions in proxy (#5311)

src/lib/edge-functions/internal.mjs

@@ -36,9 +36,16 @@ export const getInternalFunctions = async () => {
     const stats = await stat(path)
 
     if (!stats.isDirectory()) {
-      throw new Error('Path is not a directory')
+      throw new Error('Internal edge functions directory expected')
     }
+  } catch {
+    return {
+      functions: [],
+      path: null,
+    }
+  }
 
+  try {
     const manifestPath = join(path, 'manifest.json')
     const manifest = JSON.parse(await readFile(manifestPath))
 

src/lib/edge-functions/proxy.mjs

@@ -88,7 +88,7 @@ export const initializeProxy = async ({
     port: isolatePort,
     projectDir,
   })
-  const hasEdgeFunctions = userFunctionsPath !== undefined || internalFunctions.length !== 0
+  const hasEdgeFunctions = userFunctionsPath !== undefined || internalFunctionsPath
 
   return async (req) => {
     if (req.headers[headers.Passthrough] !== undefined || !hasEdgeFunctions) {

tests/integration/100.command.dev.test.cjs

@@ -751,12 +751,6 @@ test('should respect in-source configuration from edge functions', async (t) =>
         handler: () => new Response('Hello world'),
         name: 'hello',
       })
-      .withEdgeFunction({
-        config: () => ({ path: '/internal-1' }),
-        handler: () => new Response('Hello from an internal function'),
-        internal: true,
-        name: 'internal',
-      })
 
     await builder.buildAsync()
 
@@ -766,11 +760,6 @@ test('should respect in-source configuration from edge functions', async (t) =>
       t.is(res1.statusCode, 200)
       t.is(res1.body, 'Hello world')
 
-      const res2 = await got(`http://localhost:${port}/internal-1`, { throwHttpErrors: false })
-
-      t.is(res2.statusCode, 200)
-      t.is(res2.body, 'Hello from an internal function')
-
       // wait for file watcher to be up and running, which might take a little
       // if we do not wait, the next file change will not be picked up
       await pause(500)
@@ -781,6 +770,53 @@ test('should respect in-source configuration from edge functions', async (t) =>
           handler: () => new Response('Hello world'),
           name: 'hello',
         })
+        .buildAsync()
+
+      await waitForLogMatching('Reloaded edge function')
+
+      const res2 = await got(`http://localhost:${port}/hello-1`, { throwHttpErrors: false })
+
+      t.is(res2.statusCode, 404)
+
+      const res3 = await got(`http://localhost:${port}/hello-2`, { throwHttpErrors: false })
+
+      t.is(res3.statusCode, 200)
+      t.is(res3.body, 'Hello world')
+    })
+  })
+})
+
+test('should respect in-source configuration from internal edge functions', async (t) => {
+  await withSiteBuilder('site-with-internal-edge-functions', async (builder) => {
+    const publicDir = 'public'
+    await builder
+      .withNetlifyToml({
+        config: {
+          build: {
+            publish: publicDir,
+          },
+        },
+      })
+      .withEdgeFunction({
+        config: () => ({ path: '/internal-1' }),
+        handler: () => new Response('Hello from an internal function'),
+        internal: true,
+        name: 'internal',
+      })
+
+    await builder.buildAsync()
+
+    await withDevServer({ cwd: builder.directory }, async ({ port, waitForLogMatching }) => {
+      const res1 = await got(`http://localhost:${port}/internal-1`, { throwHttpErrors: false })
+
+      t.is(res1.statusCode, 200)
+      t.is(res1.body, 'Hello from an internal function')
+
+      // wait for file watcher to be up and running, which might take a little
+      // if we do not wait, the next file change will not be picked up
+      await pause(500)
+
+      await builder
         .withEdgeFunction({
           config: () => ({ path: '/internal-2' }),
           handler: () => new Response('Hello from an internal function'),
@@ -791,23 +827,14 @@ test('should respect in-source configuration from edge functions', async (t) =>
 
       await waitForLogMatching('Reloaded edge function')
 
-      const res3 = await got(`http://localhost:${port}/hello-1`, { throwHttpErrors: false })
-
-      t.is(res3.statusCode, 404)
-
-      const res4 = await got(`http://localhost:${port}/hello-2`, { throwHttpErrors: false })
-
-      t.is(res4.statusCode, 200)
-      t.is(res4.body, 'Hello world')
-
-      const res5 = await got(`http://localhost:${port}/internal-1`, { throwHttpErrors: false })
+      const res2 = await got(`http://localhost:${port}/internal-1`, { throwHttpErrors: false })
 
-      t.is(res5.statusCode, 404)
+      t.is(res2.statusCode, 404)
 
-      const res6 = await got(`http://localhost:${port}/internal-2`, { throwHttpErrors: false })
+      const res3 = await got(`http://localhost:${port}/internal-2`, { throwHttpErrors: false })
 
-      t.is(res6.statusCode, 200)
-      t.is(res6.body, 'Hello from an internal function')
+      t.is(res3.statusCode, 200)
+      t.is(res3.body, 'Hello from an internal function')
     })
   })
 })