Dynamic/JS: Add library for exporting models

javascript/ql/test/library-tests/ModelGeneration/ModelGeneration.expected

@@ -0,0 +1,3 @@
+typeModel
+| (reexport).func | reexport | Member[func] |
+summaryModel

javascript/ql/test/library-tests/ModelGeneration/ModelGeneration.ext.yml

@@ -0,0 +1,6 @@
+extensions:
+  - addsTo:
+      pack: codeql/javascript-all
+      extensible: typeModel
+    data:
+      - ["upstream-lib.XYZ", "upstream-lib", "Member[x].Member[y].Member[z]"]

javascript/ql/test/library-tests/ModelGeneration/ModelGeneration.ql

@@ -0,0 +1,17 @@
+private import javascript
+private import semmle.javascript.endpoints.EndpointNaming as EndpointNaming
+private import semmle.javascript.frameworks.data.internal.ApiGraphModels as Shared
+
+module ModelExportConfig implements ModelExportSig {
+  predicate shouldContain(API::Node node) {
+    node.getAValueReachingSink() instanceof DataFlow::FunctionNode
+  }
+
+  predicate mustBeNamed(API::Node node) { shouldContain(node) }
+}
+
+module Exported = ModelExport<ModelExportConfig>;
+
+query predicate typeModel = Exported::typeModel/3;
+
+query predicate summaryModel = Exported::summaryModel/5;

javascript/ql/test/library-tests/ModelGeneration/reexport/package.json

@@ -0,0 +1,4 @@
+{
+    "name": "reexport",
+    "main": "reexport.js"
+}

javascript/ql/test/library-tests/ModelGeneration/reexport/reexport.js

@@ -0,0 +1,10 @@
+import * as lib from "upstream-lib";
+
+export { lib };
+
+export const x = lib.x;
+export const xy = lib.x.y;
+
+export function func() {
+    return lib;
+}