inline build-time env vars in the worker script

Author: james-elicx

packages/cloudflare/src/cli/build/bundle-server.ts

@@ -31,7 +31,7 @@ export async function bundleServer(config: Config, openNextOptions: BuildOptions
   // Copy over prerendered assets (e.g. SSG routes)
   copyPrerenderedRoutes(config);
 
-  copyPackageCliFiles(packageDistDir, config, openNextOptions);
+  await copyPackageCliFiles(packageDistDir, config, openNextOptions);
 
   const nextConfigStr =
     fs

packages/cloudflare/src/cli/build/patches/investigated/copy-package-cli-files.ts

@@ -2,21 +2,36 @@ import fs from "node:fs";
 import path from "node:path";
 
 import type { BuildOptions } from "@opennextjs/aws/build/helper.js";
+import { build } from "esbuild";
 
 import { Config } from "../../../config";
+import { extractProjectEnvVars } from "../../utils";
 
 /**
- * Copies the template files present in the cloudflare adapter package into the standalone node_modules folder
+ * Copies the template files present in the cloudflare adapter package into the
+ * standalone node_modules folder and applies necessary transformations.
  */
-export function copyPackageCliFiles(packageDistDir: string, config: Config, openNextConfig: BuildOptions) {
+export async function copyPackageCliFiles(
+  packageDistDir: string,
+  config: Config,
+  openNextConfig: BuildOptions
+) {
   console.log("# copyPackageTemplateFiles");
   const sourceDir = path.join(packageDistDir, "cli");
   const destinationDir = path.join(config.paths.internal.package, "cli");
 
   fs.cpSync(sourceDir, destinationDir, { recursive: true });
 
-  fs.copyFileSync(
-    path.join(packageDistDir, "cli", "templates", "worker.ts"),
-    path.join(openNextConfig.outputDir, "worker.ts")
-  );
+  const envVars = extractProjectEnvVars(openNextConfig);
+  await build({
+    entryPoints: [path.join(packageDistDir, "cli", "templates", "worker.ts")],
+    outfile: path.join(openNextConfig.outputDir, "worker.js"),
+    format: "esm",
+    target: "esnext",
+    bundle: false,
+    minify: false,
+    define: {
+      __OPENNEXT_BUILD_TIME_ENV: JSON.stringify(envVars),
+    },
+  });
 }