fix: invalidate railpack build cache when env changes

apps/dokploy/__test__/deploy/railpack.command.test.ts

@@ -0,0 +1,104 @@
+import type { ApplicationNested } from "@dokploy/server/utils/builders";
+import { getRailpackCommand } from "@dokploy/server/utils/builders/railpack";
+import { describe, expect, it } from "vitest";
+
+const createApplication = (
+	overrides: Partial<ApplicationNested> = {},
+): ApplicationNested =>
+	({
+		appName: "test-app",
+		buildType: "railpack",
+		sourceType: "git",
+		buildPath: "/",
+		railpackVersion: "0.15.4",
+		env: "TEST_VAR=one",
+		cleanCache: false,
+		environment: {
+			project: {
+				env: "",
+			},
+			env: "",
+		},
+		...overrides,
+	}) as unknown as ApplicationNested;
+
+const getSecretsHash = (command: string) => {
+	const match = command.match(/secrets-hash=([a-f0-9]{64})/);
+	if (!match?.[1]) {
+		throw new Error("secrets-hash build arg was not found");
+	}
+
+	return match[1];
+};
+
+describe("getRailpackCommand", () => {
+	it("includes secrets-hash without clean cache", () => {
+		const command = getRailpackCommand(createApplication());
+
+		expect(command).toContain("--build-arg secrets-hash=");
+		expect(command).not.toContain("cache-key=");
+	});
+
+	it("includes cache-key only when clean cache is enabled", () => {
+		const command = getRailpackCommand(
+			createApplication({
+				cleanCache: true,
+			}),
+		);
+
+		expect(command).toContain("--build-arg secrets-hash=");
+		expect(command).toContain("--build-arg cache-key=");
+	});
+
+	it("changes secrets-hash when an environment value changes", () => {
+		const firstCommand = getRailpackCommand(
+			createApplication({
+				env: "TEST_VAR=one",
+			}),
+		);
+		const secondCommand = getRailpackCommand(
+			createApplication({
+				env: "TEST_VAR=two",
+			}),
+		);
+
+		expect(getSecretsHash(firstCommand)).not.toEqual(
+			getSecretsHash(secondCommand),
+		);
+	});
+
+	it("changes secrets-hash when referenced project or environment values change", () => {
+		const firstCommand = getRailpackCommand(
+			createApplication({
+				env: [
+					"PROJECT_VALUE=${{project.SHARED_VALUE}}",
+					"ENVIRONMENT_VALUE=${{environment.SHARED_VALUE}}",
+				].join("\n"),
+				environment: {
+					project: {
+						env: "SHARED_VALUE=one",
+					},
+					env: "SHARED_VALUE=alpha",
+				},
+			} as Partial<ApplicationNested>),
+		);
+		const secondCommand = getRailpackCommand(
+			createApplication({
+				env: [
+					"PROJECT_VALUE=${{project.SHARED_VALUE}}",
+					"ENVIRONMENT_VALUE=${{environment.SHARED_VALUE}}",
+				].join("\n"),
+				environment: {
+					project: {
+						env: "SHARED_VALUE=two",
+					},
+					env: "SHARED_VALUE=beta",
+				},
+			} as Partial<ApplicationNested>),
+		);
+
+		expect(getSecretsHash(firstCommand)).not.toEqual(
+			getSecretsHash(secondCommand),
+		);
+	});
+});

packages/server/src/utils/builders/railpack.ts

@@ -48,14 +48,9 @@ export const getRailpackCommand = (application: ApplicationNested) => {
 	const buildArgs = [
 		"buildx",
 		"build",
-		...(cacheKey
-			? [
-					"--build-arg",
-					`secrets-hash=${secretsHash}`,
-					"--build-arg",
-					`cache-key=${cacheKey}`,
-				]
-			: []),
+		"--build-arg",
+		`secrets-hash=${secretsHash}`,
+		...(cacheKey ? ["--build-arg", `cache-key=${cacheKey}`] : []),
 		"--build-arg",
 		`BUILDKIT_SYNTAX=ghcr.io/railwayapp/railpack-frontend:v${application.railpackVersion}`,
 		"-f",