Merge pull request #50 from Sebmaster/feature/static-files

Avoid invoking worker for static files

.changeset/fair-forks-applaud.md

@@ -0,0 +1,5 @@
+---
+"@cloudflare/next-on-pages": minor
+---
+
+Avoid invoking worker for static files

src/index.ts

@@ -9,6 +9,8 @@ import pLimit from "p-limit";
 import acorn, { parse, Node } from "acorn";
 import { generate } from "astring";
 
+import { version as nextOnPagesVersion } from "../package.json";
+
 type LooseNode = Node & {
   expression?: LooseNode;
   callee?: LooseNode;
@@ -433,7 +435,7 @@ const transform = async ({
           )}, entrypoint: require('${filepath}')}`
       )
       .join(",")}};
-      
+
       export const __MIDDLEWARE__ = {${[...hydratedMiddleware.entries()]
         .map(
           ([name, { matchers, filepath }]) =>
@@ -489,6 +491,45 @@ const help = () => {
   );
 };
 
+
+const generateHeaders = async () => {
+  await writeFile(
+    ".vercel/output/static/_headers",
+    `
+# === START AUTOGENERATED next-on-pages IMMUTABLE HEADERS ===
+/_next/static/*
+  Cache-Control: public,max-age=31536000,immutable
+# === END AUTOGENERATED next-on-pages IMMUTABLE HEADERS ===\n`,
+    {
+      // in case someone configured redirects already, append to the end
+      flag: "a",
+    }
+  );
+};
+
+const generateRoutes = async () => {
+  try {
+    await writeFile(
+      ".vercel/output/static/_routes.json",
+      JSON.stringify({
+        version: 1,
+        description: `Built with @cloudflare/next-on-pages@${nextOnPagesVersion}.`,
+        include: ["/*"],
+        exclude: ["/_next/static/*"],
+      }),
+      { flag: "ax" } // don't generate file if it's already manually maintained
+    );
+  } catch (e) {
+    if (e.code != "EEXIST") {
+      throw e;
+    }
+  }
+};
+
+const generateMetadata = async () => {
+  await Promise.all([generateHeaders(), generateRoutes()]);
+};
+
 const main = async ({
   skipBuild,
   experimentalMinify,
@@ -502,6 +543,7 @@ const main = async ({
   }
 
   await transform({ experimentalMinify });
+  await generateMetadata();
 };
 
 (async () => {