fix: propagate process.env to Python runtime serveAdmin environment

src/deploy/functions/runtimes/python/index.spec.ts

@@ -2,6 +2,7 @@
 import * as sinon from "sinon";
 
 import * as python from ".";
+import * as pythonFunctions from "../../../../functions/python";
 
 const PROJECT_ID = "test-project";
 const SOURCE_DIR = "/some/path/fns";
@@ -34,4 +35,127 @@
       expect(delegate.getPythonBinary()).to.equal("python.exe");
     });
   });
+
+  describe("serveAdmin", () => {
+    let delegate: python.Delegate;
+    let runWithVirtualEnvStub: sinon.SinonStub;
+    let originalEnv: NodeJS.ProcessEnv;
+
+    beforeEach(() => {
+      delegate = new python.Delegate(PROJECT_ID, SOURCE_DIR, "python310");
+
+      // Mock the modulesDir method
+      sinon.stub(delegate, "modulesDir" as any).resolves("/mock/modules/dir");
+
+      // Mock runWithVirtualEnv from the imported module
+      runWithVirtualEnvStub = sinon.stub(pythonFunctions, "runWithVirtualEnv");
+
+      // Store original environment
+      originalEnv = { ...process.env };
+    });
+
+    afterEach(() => {
+      // Restore original environment
+      process.env = originalEnv;
+      sinon.restore();
+    });
+
+    it("should propagate process.env including GOOGLE_APPLICATION_CREDENTIALS", async () => {
+      // Set up test environment variables
+      process.env.GOOGLE_APPLICATION_CREDENTIALS = "/path/to/service-account.json";
+      process.env.CUSTOM_VAR = "custom_value";
+
+      const testEnvs = {
+        FIREBASE_PROJECT_ID: PROJECT_ID,
+        FUNCTION_TARGET: "test_function",
+      };
+
+      // Mock the runWithVirtualEnv function
+      const mockChildProcess = {
+        stdout: { on: sinon.stub() },
+        stderr: { on: sinon.stub() },
+        killed: false,
+        kill: sinon.stub(),
+        once: sinon.stub(),
+      };
+      runWithVirtualEnvStub.returns(mockChildProcess);
+
+      await delegate.serveAdmin(8080, testEnvs);
+
+      // Verify runWithVirtualEnv was called with correct environment
+      expect(runWithVirtualEnvStub.calledOnce).to.be.true;
+      const callArgs = runWithVirtualEnvStub.getCall(0).args;
+      const passedEnvs = callArgs[2]; // Third argument is the environment
+
+      // Verify process.env variables are included
+      expect(passedEnvs.GOOGLE_APPLICATION_CREDENTIALS).to.equal("/path/to/service-account.json");
+      expect(passedEnvs.CUSTOM_VAR).to.equal("custom_value");
+
+      // Verify provided envs are included
+      expect(passedEnvs.FIREBASE_PROJECT_ID).to.equal(PROJECT_ID);
+      expect(passedEnvs.FUNCTION_TARGET).to.equal("test_function");
+
+      // Verify ADMIN_PORT is set
+      expect(passedEnvs.ADMIN_PORT).to.equal("8080");
+    });
+
+    it("should preserve process.env when no additional envs are provided", async () => {
+      // Set up test environment variables
+      process.env.GOOGLE_APPLICATION_CREDENTIALS = "/path/to/service-account.json";
+      (process.env as any).NODE_ENV = "test";
+
+      const mockChildProcess = {
+        stdout: { on: sinon.stub() },
+        stderr: { on: sinon.stub() },
+        killed: false,
+        kill: sinon.stub(),
+        once: sinon.stub(),
+      };
+      runWithVirtualEnvStub.returns(mockChildProcess);
+
+      await delegate.serveAdmin(8080, {});
+
+      // Verify runWithVirtualEnv was called with correct environment
+      expect(runWithVirtualEnvStub.calledOnce).to.be.true;
+      const callArgs = runWithVirtualEnvStub.getCall(0).args;
+      const passedEnvs = callArgs[2];
+
+      // Verify process.env variables are preserved
+      expect(passedEnvs.GOOGLE_APPLICATION_CREDENTIALS).to.equal("/path/to/service-account.json");
+      expect(passedEnvs.NODE_ENV).to.equal("test");
+      expect(passedEnvs.ADMIN_PORT).to.equal("8080");
+    });
+
+    it("should override process.env with provided envs when there are conflicts", async () => {
+      // Set up conflicting environment variables
+      process.env.GOOGLE_APPLICATION_CREDENTIALS = "/original/path.json";
+      process.env.FIREBASE_PROJECT_ID = "original-project";
+
+      const testEnvs = {
+        GOOGLE_APPLICATION_CREDENTIALS: "/new/path.json",
+        FIREBASE_PROJECT_ID: PROJECT_ID,
+      };
+
+      const mockChildProcess = {
+        stdout: { on: sinon.stub() },
+        stderr: { on: sinon.stub() },
+        killed: false,
+        kill: sinon.stub(),
+        once: sinon.stub(),
+      };
+      runWithVirtualEnvStub.returns(mockChildProcess);
+
+      await delegate.serveAdmin(8080, testEnvs);
+
+      // Verify runWithVirtualEnv was called with correct environment
+      expect(runWithVirtualEnvStub.calledOnce).to.be.true;
+      const callArgs = runWithVirtualEnvStub.getCall(0).args;
+      const passedEnvs = callArgs[2];
+
+      // Verify provided envs override process.env
+      expect(passedEnvs.GOOGLE_APPLICATION_CREDENTIALS).to.equal("/new/path.json");
+      expect(passedEnvs.FIREBASE_PROJECT_ID).to.equal(PROJECT_ID);
+      expect(passedEnvs.ADMIN_PORT).to.equal("8080");
+    });
+  });
 });

src/deploy/functions/runtimes/python/index.ts

@@ -151,6 +151,7 @@ export class Delegate implements runtimes.RuntimeDelegate {
   async serveAdmin(port: number, envs: backend.EnvironmentVariables) {
     const modulesDir = await this.modulesDir();
     const envWithAdminPort = {
+      ...process.env,
       ...envs,
       ADMIN_PORT: port.toString(),
     };