fixup! enable getCloudflareContext to work in middlewares via a new enableEdgeDevGetCloudflareContext utility

use `process.env.NEXT_RUNTIME` to detect the edge runtime instead of try-catching

Author: dario-piotrowicz

packages/cloudflare/src/api/cloudflare-context.ts

@@ -67,30 +67,27 @@ async function getCloudflareContextInNextDev<
   };
 
   if (!global[cloudflareContextInNextDevSymbol]) {
-    try {
-      const cloudflareContext = await getCloudflareContextFromWrangler<CfProperties, Context>();
-      global[cloudflareContextInNextDevSymbol] = cloudflareContext;
-    } catch (e: unknown) {
-      if (e instanceof Error && e.message.includes("A dynamic import callback was not specified")) {
-        const getCloudflareContextFunctionName = getCloudflareContext.name;
-        const enablingFunctionName = enableEdgeDevGetCloudflareContext.name;
-        throw new Error(
-          `\n\n\`${getCloudflareContextFunctionName}\` has been invoked during development inside the edge runtime ` +
-            "this is not enabled, to enable such use of the function you need to import and call the " +
-            `\`${enablingFunctionName}\` function inside your Next.js config file\n\n"` +
-            "Example: \n   ```\n   // next.config.mjs\n\n" +
-            `   import { ${enablingFunctionName} } from "@opennextjs/cloudflare";\n\n` +
-            `   ${enablingFunctionName}();\n\n` +
-            "   /** @type {import('next').NextConfig} */\n" +
-            "   const nextConfig = {};\n" +
-            "   export default nextConfig;\n" +
-            "   ```\n" +
-            "\n(note: currently middlewares in Next.js are always run using the edge runtime)\n\n"
-        );
-      } else {
-        throw e;
-      }
+    const inEdgeRuntime = process.env.NEXT_RUNTIME === "edge";
+    if (inEdgeRuntime) {
+      const getCloudflareContextFunctionName = getCloudflareContext.name;
+      const enablingFunctionName = enableEdgeDevGetCloudflareContext.name;
+      throw new Error(
+        `\n\n\`${getCloudflareContextFunctionName}\` has been invoked during development inside the edge runtime ` +
+          "this is not enabled, to enable such use of the function you need to import and call the " +
+          `\`${enablingFunctionName}\` function inside your Next.js config file\n\n"` +
+          "Example: \n   ```\n   // next.config.mjs\n\n" +
+          `   import { ${enablingFunctionName} } from "@opennextjs/cloudflare";\n\n` +
+          `   ${enablingFunctionName}();\n\n` +
+          "   /** @type {import('next').NextConfig} */\n" +
+          "   const nextConfig = {};\n" +
+          "   export default nextConfig;\n" +
+          "   ```\n" +
+          "\n(note: currently middlewares in Next.js are always run using the edge runtime)\n\n"
+      );
     }
+
+    const cloudflareContext = await getCloudflareContextFromWrangler<CfProperties, Context>();
+    global[cloudflareContextInNextDevSymbol] = cloudflareContext;
   }
 
   return global[cloudflareContextInNextDevSymbol]!;