Adds protect_env and admin_stubs to disable-able emulator features

src/emulator/functionsEmulator.ts

@@ -519,7 +519,7 @@ export function InvokeRuntime(
       JSON.stringify(frb),
       opts.serializedTriggers || "",
     ],
-    { env: { node: nodeBinary, ...opts.env }, cwd: frb.cwd }
+    { env: { node: nodeBinary, ...opts.env, ...process.env }, cwd: frb.cwd }
   );
 
   const buffers: {

src/emulator/functionsEmulatorRuntime.ts

@@ -364,6 +364,16 @@ function InitializeFirebaseAdminStubs(frb: FunctionsRuntimeBundle): typeof admin
 
   let hasInitializedSettings = false;
   const initializeSettings = (app: admin.app.App, userSettings: any) => {
+    const isEnabled = isFeatureEnabled(frb, "admin_stubs");
+
+    if (!isEnabled) {
+      if (!hasInitializedSettings) {
+        app.firestore().settings(userSettings);
+        hasInitializedSettings = true;
+      }
+      return;
+    }
+
     if (!hasInitializedSettings && frb.ports.firestore) {
       app.firestore().settings({
         projectId: frb.projectId,
@@ -620,7 +630,7 @@ function isFeatureEnabled(
   frb: FunctionsRuntimeBundle,
   feature: keyof FunctionsRuntimeFeatures
 ): boolean {
-  return frb.disabled_features ? frb.disabled_features[feature] || false : true;
+  return frb.disabled_features ? !frb.disabled_features[feature] : true;
 }
 
 async function main(): Promise<void> {

src/emulator/functionsEmulatorShared.ts

@@ -42,6 +42,7 @@ export interface FunctionsRuntimeFeatures {
   timeout?: boolean;
   memory_limiting?: boolean;
   protect_env?: boolean;
+  admin_stubs?: boolean;
 }
 
 const memoryLookup = {

src/serve/functions.ts

@@ -17,6 +17,8 @@ module.exports = {
           network_filtering: true,
           timeout: true,
           memory_limiting: true,
+          protect_env: true,
+          admin_stubs: true,
         },
       })
     );