From 860f5fb851bba773806fa742b4eac4b77f82b13e Mon Sep 17 00:00:00 2001
From: Bill Collins <bill@bill.works>
Date: Wed, 2 Jul 2025 17:29:50 +0100
Subject: [PATCH] Fix addon detection in automigrations on windows

Addon detection is done by sniffing the value returned by getAddonNames,
which pulls values from storybook config.

However, the wrap-require automation wraps addon references in an
absolute path resolver.

On windows this means that addons are now reported as e.g.
@storybook\\addon-a11y, which defeats detection
---
 code/core/src/common/utils/get-addon-names.test.ts | 12 ++++++++++++
 code/core/src/common/utils/get-addon-names.ts      |  5 +++++
 2 files changed, 17 insertions(+)

diff --git a/code/core/src/common/utils/get-addon-names.test.ts b/code/core/src/common/utils/get-addon-names.test.ts
index 7cfd1db63849..182426948dfe 100644
--- a/code/core/src/common/utils/get-addon-names.test.ts
+++ b/code/core/src/common/utils/get-addon-names.test.ts
@@ -42,6 +42,18 @@ describe('getAddonNames', () => {
     expect(result).toEqual(['@storybook/addon-highlight', '@storybook/addon-outline']);
   });
 
+  it('should extract addon names from windows absolute paths', () => {
+    const config = {
+      stories: [],
+      addons: [
+        '\\sandbox\\react-vite-default-ts\\node_modules\\@storybook\\addon-highlight',
+        '\\sandbox\\react-vite-default-ts\\node_modules\\@storybook\\addon-outline',
+      ],
+    };
+    const result = getAddonNames(config);
+    expect(result).toEqual(['@storybook/addon-highlight', '@storybook/addon-outline']);
+  });
+
   it('should extract addon names from pnpm paths', () => {
     const config = {
       stories: [],
diff --git a/code/core/src/common/utils/get-addon-names.ts b/code/core/src/common/utils/get-addon-names.ts
index 0c763cf5b271..98d0f3b9ee1a 100644
--- a/code/core/src/common/utils/get-addon-names.ts
+++ b/code/core/src/common/utils/get-addon-names.ts
@@ -1,5 +1,7 @@
 import type { StorybookConfig } from 'storybook/internal/types';
 
+import { normalizePath } from './normalize-path';
+
 export const getAddonNames = (mainConfig: StorybookConfig): string[] => {
   const addons = mainConfig.addons || [];
   const addonList = addons.map((addon) => {
@@ -14,6 +16,9 @@ export const getAddonNames = (mainConfig: StorybookConfig): string[] => {
       return undefined;
     }
 
+    // Ensure posix paths for plugin name sniffing
+    name = normalizePath(name);
+
     // For absolute paths, pnpm and yarn pnp,
     // Remove everything before and including "node_modules/"
     name = name.replace(/.*node_modules\//, '');