fix: Crash deployment if function app zip file doesn't exist (#242)

Author: medikoo

src/plugins/deploy/azureDeployPlugin.test.ts

@@ -64,4 +64,10 @@ describe("Deploy plugin", () => {
     expect(ResourceService.prototype.listDeployments).toBeCalled();
     expect(sls.cli.log).lastCalledWith(deploymentString);
   });
+	
+  it("crashes deploy if zip file is not found", async () => {
+    FunctionAppService.prototype.getFunctionZipFile = jest.fn(() => "notExisting.zip");
+    await expect(invokeHook(plugin, "deploy:deploy"))
+      .rejects.toThrow(/Function app zip file '.*' does not exist/)
+  });
 });

src/plugins/deploy/azureDeployPlugin.ts

@@ -56,8 +56,7 @@ export class AzureDeployPlugin extends AzureBasePlugin<AzureLoginOptions> {
     const functionAppService = new FunctionAppService(this.serverless, this.options);
     const zipFile = functionAppService.getFunctionZipFile();
     if (!fs.existsSync(zipFile)) {
-      this.log(`Function app zip file '${zipFile}' does not exist`);
-      return Promise.resolve();
+      throw new Error(`Function app zip file '${zipFile}' does not exist`);
     }
     await resourceService.deployResourceGroup();
     const functionApp = await functionAppService.deploy();