Core: Normalize file paths in ChangeDetectionService and trace-changed for Windows support

code/core/src/core-server/change-detection/ChangeDetectionService.test.ts

@@ -1,4 +1,4 @@
-import { join } from 'node:path';
+import { join } from 'pathe';
 
 import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
 
@@ -637,17 +637,20 @@ describe('ChangeDetectionService', () => {
   });
 
   it('stores changed files as normalized repo-relative paths', async () => {
-    const buttonCss = createModuleNode(join(workingDir, 'src', 'Button.module.css'));
-    const buttonComponent = createModuleNode(join(workingDir, 'src', 'Button.tsx'));
-    const buttonStory = createModuleNode(join(workingDir, 'src', 'Button.stories.tsx'));
+    const buttonCssPath = join(workingDir, 'src', 'Button.module.css');
+    const buttonComponentPath = join(workingDir, 'src', 'Button.tsx');
+    const buttonStoryPath = join(workingDir, 'src', 'Button.stories.tsx');
+    const buttonCss = createModuleNode(buttonCssPath);
+    const buttonComponent = createModuleNode(buttonComponentPath);
+    const buttonStory = createModuleNode(buttonStoryPath);
 
     buttonCss.importers.add(buttonComponent);
     buttonComponent.importers.add(buttonStory);
 
     const moduleGraph: ModuleGraph = new Map([
-      [join(workingDir, 'src', 'Button.module.css'), new Set([buttonCss])],
-      [join(workingDir, 'src', 'Button.tsx'), new Set([buttonComponent])],
-      [join(workingDir, 'src', 'Button.stories.tsx'), new Set([buttonStory])],
+      [buttonCssPath, new Set([buttonCss])],
+      [buttonComponentPath, new Set([buttonComponent])],
+      [buttonStoryPath, new Set([buttonStory])],
     ]);
     const storyIndex = createStoryIndex([
       { storyId: 'button--primary', importPath: './src/Button.stories.tsx', title: 'Button' },

code/core/src/core-server/change-detection/ChangeDetectionService.ts

@@ -1,4 +1,4 @@
-import { relative, resolve } from 'node:path';
+import { join, relative } from 'pathe';
 
 import { logger } from 'storybook/internal/node-logger';
 import type {
@@ -41,23 +41,14 @@ function getStoryIdsByAbsolutePath(
   workingDir: string
 ): Map<string, Set<string>> {
   const storyIdsByFile = new Map<string, Set<string>>();
-  const addStoryId = (filePath: string, storyId: string) => {
-    const storyIds = storyIdsByFile.get(filePath) ?? new Set<string>();
-    storyIds.add(storyId);
-    storyIdsByFile.set(filePath, storyIds);
-  };
-
   Object.values(storyIndex.entries).forEach((entry) => {
-    if (entry.type !== 'story' || entry.importPath.startsWith('virtual:')) {
-      return;
+    if (entry.type === 'story' && !entry.importPath.startsWith('virtual:')) {
+      const filePath = join(workingDir, entry.importPath);
+      const storyIds = storyIdsByFile.get(filePath) ?? new Set<string>();
+      storyIds.add(entry.id);
+      storyIdsByFile.set(filePath, storyIds);
     }
-
-    const absolutePath = resolve(workingDir, entry.importPath);
-    const normalizedAbsolutePath = normalizePath(absolutePath);
-    addStoryId(absolutePath, entry.id);
-    addStoryId(normalizedAbsolutePath, entry.id);
   });
-
   return storyIdsByFile;
 }
 
@@ -80,11 +71,6 @@ function mergeStatusValues(
   return nextValue;
 }
 
-function toRepoRelativePath(repoRoot: string, filePath: string): string {
-  const relativePath = relative(repoRoot, filePath);
-  return relativePath.startsWith('\\\\?\\') ? relativePath : relativePath.replace(/\\/g, '/');
-}
-
 /**
  * Coordinates change detection by listening to builder module-graph updates, resolving changed
  * files from git, mapping those changes to affected stories, and publishing the resulting story
@@ -255,12 +241,8 @@ export class ChangeDetectionService {
       this.options.storyIndexGeneratorPromise,
     ]);
 
-    const changedFiles = new Set(
-      Array.from(changes.changed).map((filePath) => normalizePath(resolve(repoRoot, filePath)))
-    );
-    const newFiles = new Set(
-      Array.from(changes.new).map((filePath) => normalizePath(resolve(repoRoot, filePath)))
-    );
+    const changedFiles = new Set(Array.from(changes.changed).map((path) => join(repoRoot, path)));
+    const newFiles = new Set(Array.from(changes.new).map((path) => join(repoRoot, path)));
     const scannedFiles = new Set([...changedFiles, ...newFiles]);
     const normalizedModuleGraph = new Map<string, Set<ModuleNode>>();
     moduleGraph.forEach((nodes, filePath) => {
@@ -302,7 +284,7 @@ export class ChangeDetectionService {
         storyIds.forEach((storyId) => {
           const existingStatus = statuses.get(storyId);
           const changedStoryFiles = new Set<string>(existingStatus?.data?.changedFiles ?? []);
-          changedStoryFiles.add(toRepoRelativePath(repoRoot, changedFile));
+          changedStoryFiles.add(relative(repoRoot, changedFile));
 
           statuses.set(storyId, {
             storyId,

code/core/src/core-server/change-detection/GitDiffProvider.ts

@@ -1,6 +1,6 @@
 import { watch, type FSWatcher } from 'node:fs';
 import { readFile, stat } from 'node:fs/promises';
-import { dirname, join, resolve as resolvePath } from 'node:path';
+import { dirname, join, resolve as resolvePath } from 'pathe';
 
 // eslint-disable-next-line depend/ban-dependencies
 import { execa, type ExecaError } from 'execa';