C3: Error when an unsupported platform is specified for a framework (#10695)

Author: dario-piotrowicz

.changeset/neat-pets-laugh.md

@@ -0,0 +1,5 @@
+---
+"create-cloudflare": patch
+---
+
+Error when an unsupported platform is specified for a framework

packages/create-cloudflare/e2e/tests/cli/cli.test.ts

@@ -634,6 +634,19 @@ describe("Create Cloudflare CLI", () => {
 			}
 		});
 	});
+
+	test("error when trying to create a solid app on Pages", async ({
+		logStream,
+	}) => {
+		const { errors } = await runC3(
+			["--platform=pages", "--framework=solid", "my-app"],
+			[],
+			logStream,
+		);
+		expect(errors).toMatch(
+			/Error: The .*? framework doesn't support the "pages" platform/,
+		);
+	});
 });
 
 function normalizeOutput(output: string): string {

packages/create-cloudflare/src/templates.ts

@@ -529,6 +529,10 @@ export const createContext = async (
 			}
 
 			frameworkConfig = frameworkConfig.platformVariants[platform];
+		} else if (args.platform && args.platform !== frameworkConfig.platform) {
+			throw new Error(
+				`The ${frameworkConfig.displayName} framework doesn't support the "${args.platform}" platform`,
+			);
 		}
 
 		template = {