From 2410f2621229d41e7ac2f10944b06edc0c134de1 Mon Sep 17 00:00:00 2001
From: Van Nguyen <nguyenthanhvan1902@gmail.com>
Date: Tue, 13 Oct 2026 23:54:50 +0700
Subject: [PATCH] docs(playground): say that the Dockerfile stack needs
 repokeeper 0.9.0

The page names the first repokeeper that knows the standard, 0.8.2, and adds a
note for the two switches that came later. The Dockerfile stack came with
0.9.0 too and had no note, so the page offered a file that 0.8.2 refuses.
---
 playground/config.d.ts  | 1 +
 playground/config.js    | 7 +++++++
 test/playground.test.ts | 7 +++++++
 3 files changed, 15 insertions(+)

diff --git a/playground/config.d.ts b/playground/config.d.ts
index fcb89e4..37329b3 100644
--- a/playground/config.d.ts
+++ b/playground/config.d.ts
@@ -14,6 +14,7 @@ export const STANDARD: string;
 export const NEEDS_VERSION: string;
 export const AUTOUPDATE_NEEDS_VERSION: string;
 export const SECURITY_NEEDS_VERSION: string;
+export const STACK_NEEDS_VERSION: Record<string, string>;
 export const STACKS: Array<{ id: string; label: string }>;
 export const PLATFORM_STACKS: Record<"github" | "gitlab", string[]>;
 export const PRESETS: Array<{ id: string; summary: string }>;
diff --git a/playground/config.js b/playground/config.js
index f65faa7..344bbff 100644
--- a/playground/config.js
+++ b/playground/config.js
@@ -16,6 +16,9 @@ export const AUTOUPDATE_NEEDS_VERSION = "0.9.0";
 /** The same for code scanning. */
 export const SECURITY_NEEDS_VERSION = "0.9.0";
 
+/** The same for the stacks added after the standard the file names: an earlier repokeeper does not know them. */
+export const STACK_NEEDS_VERSION = { docker: "0.9.0" };
+
 export const STACKS = [
   { id: "node", label: "Node.js" },
   { id: "python", label: "Python" },
@@ -200,6 +203,10 @@ export function problems(input) {
     if (/^\/|(^|\/)\.\.(\/|$)/.test(stack.directory)) {
       found.push(`The folder of ${stack.id} has to be a path inside the repository.`);
     }
+    if (STACK_NEEDS_VERSION[stack.id]) {
+      const { label } = STACKS.find((known) => known.id === stack.id);
+      found.push(`The ${label} stack needs repokeeper ${STACK_NEEDS_VERSION[stack.id]} or newer.`);
+    }
   }
   if (input.modules.health) {
     const { health } = input;
diff --git a/test/playground.test.ts b/test/playground.test.ts
index 1fc8595..d1030fd 100644
--- a/test/playground.test.ts
+++ b/test/playground.test.ts
@@ -244,6 +244,13 @@ describe("playground", () => {
     ]);
   });
 
+  it("names the repokeeper a stack newer than the standard needs", () => {
+    const note = "The Dockerfile stack needs repokeeper 0.9.0 or newer.";
+    expect(problems(filled("standard", "github", [{ id: "docker" }]))).toEqual([note]);
+    expect(problems(filled("standard", "gitlab", [{ id: "node" }, { id: "docker" }]))).toEqual([note]);
+    expect(problems(filled("standard", "github", [{ id: "node" }]))).toEqual([]);
+  });
+
   it("offers the command only while a preset says everything the form says", () => {
     expect(shortcutCommand(filled("standard"))).toBe("npx repokeeper init --stack node");
     expect(shortcutCommand(filled("essential"))).toBe("npx repokeeper init --preset essential --stack node");