fix(javascript): qualify export helper calls before argument scanning

src/domain/javascript/javascriptAstExports.exact_keys.test.ts

@@ -10,6 +10,7 @@ it.each([
   'module["exports.value"] = 1;',
   "module.exports = { [key]: 1 };",
   'Object[method](exports, "value", {});',
+  "function d() {} d(exports, { invented: 1 });",
 ])("does not invent an export name for %s", (source) => {
   expect(collectJavaScriptExports(parse(source)).values).toEqual([]);
 });
@@ -30,6 +31,13 @@ it("retains static computed and ordinary names", () => {
   ).toEqual(["done", "ready"]);
 });
 
+it("retains member helper exports on this", () => {
+  expect(
+    collectJavaScriptExports(parse("this.d(exports, { ready: () => 1 });"))
+      .values,
+  ).toEqual(["ready"]);
+});
+
 it("does not expose invented names in bundler module analysis", () => {
   const analysis = analyzeJavaScriptStaticSource(`
     globalThis.webpackChunkApp.push([[1], { 1: function(module, exports) {

src/domain/javascript/javascriptAstFingerprint.ts

@@ -96,6 +96,12 @@ const collectCallExports = (
 ): void => {
   const callee = memberPath(call.callee);
   if (callee === null) return;
+  const definePropertyCall =
+    callee.length === 2 &&
+    callee[0] === "Object" &&
+    callee[1] === "defineProperty";
+  const declarationCall = callee.length >= 2 && callee.at(-1) === "d";
+  if (!definePropertyCall && !declarationCall) return;
   const target = memberPath(call.arguments[0]);
   const exportTarget =
     target !== null &&
@@ -104,15 +110,11 @@ const collectCallExports = (
         target[0] === "module" &&
         target[1] === "exports"));
   if (!exportTarget) return;
-  if (
-    callee.length === 2 &&
-    callee[0] === "Object" &&
-    callee[1] === "defineProperty"
-  ) {
+  if (definePropertyCall) {
     const name = stringValue(call.arguments[1]);
     if (name !== undefined) addExport(output, name);
+    return;
   }
-  if (callee.at(-1) !== "d") return;
   const declarations = call.arguments[1];
   if (t.isObjectExpression(declarations))
     collectObjectKeys(declarations, output);
@@ -151,7 +153,11 @@ const memberPath = (
     properties.push(property);
     current = current.object;
   }
-  if (current === undefined || current === null || !t.isIdentifier(current))
-    return null;
-  return [current.name, ...properties.reverse()];
+  if (current === undefined || current === null) return null;
+  const root = t.isIdentifier(current)
+    ? current.name
+    : t.isThisExpression(current)
+      ? "this"
+      : null;
+  return root === null ? null : [root, ...properties.reverse()];
 };