Fixed compilation transform error when there are no host functions used. (#69)

* Fix error when no host functions are in use

* Update CHANGELOG.md

Author: mattjohnsonpint

CHANGELOG.md

@@ -1,5 +1,9 @@
 # Change Log
 
+# UNRELEASED
+
+- Fixed compilation transform error when there are no host functions used. [#68](https://github.com/gohypermode/functions-as/pull/68)
+
 # 2024-04-25 - Version 0.6.0
 
 _Note: Requires Hypermode Runtime v0.6.0 or newer_

src/transform/src/extractor.ts

@@ -169,9 +169,12 @@ export class Extractor {
 
   private getHostFunctions() {
     const results: importExportInfo[] = [];
-    this.program.moduleImports.get("hypermode").forEach((v, k) => {
-      results.push({ name: k, function: v.internalName });
-    });
+    const hypermodeImports = this.program.moduleImports.get("hypermode");
+    if (hypermodeImports) {
+      hypermodeImports.forEach((v, k) => {
+        results.push({ name: k, function: v.internalName });
+      });
+    }
     return results;
   }