Docs: Fix issue with referencing non-story files with names similar or equal to docs files

code/lib/core-server/src/utils/StoryIndexGenerator.test.ts

@@ -755,6 +755,17 @@ describe('StoryIndexGenerator', () => {
                 "title": "A",
                 "type": "story",
               },
+              "componentreference--docs": Object {
+                "id": "componentreference--docs",
+                "importPath": "./src/docs2/ComponentReference.mdx",
+                "name": "docs",
+                "storiesImports": Array [],
+                "tags": Array [
+                  "docs",
+                ],
+                "title": "ComponentReference",
+                "type": "docs",
+              },
               "docs2-yabbadabbadooo--docs": Object {
                 "id": "docs2-yabbadabbadooo--docs",
                 "importPath": "./src/docs2/Title.mdx",
@@ -802,6 +813,7 @@ describe('StoryIndexGenerator', () => {
           .toMatchInlineSnapshot(`
           Array [
             "A",
+            "titlePrefix/ComponentReference",
             "A",
             "titlePrefix/NoTitle",
             "A",
@@ -860,6 +872,17 @@ describe('StoryIndexGenerator', () => {
                 "title": "A",
                 "type": "story",
               },
+              "componentreference--info": Object {
+                "id": "componentreference--info",
+                "importPath": "./src/docs2/ComponentReference.mdx",
+                "name": "Info",
+                "storiesImports": Array [],
+                "tags": Array [
+                  "docs",
+                ],
+                "title": "ComponentReference",
+                "type": "docs",
+              },
               "docs2-yabbadabbadooo--info": Object {
                 "id": "docs2-yabbadabbadooo--info",
                 "importPath": "./src/docs2/Title.mdx",
@@ -918,6 +941,7 @@ describe('StoryIndexGenerator', () => {
         expect(Object.keys((await generator.getIndex()).entries)).toMatchInlineSnapshot(`
           Array [
             "a--story-one",
+            "componentreference--docs",
             "a--metaof",
             "notitle--docs",
             "a--second-docs",
@@ -947,6 +971,7 @@ describe('StoryIndexGenerator', () => {
         expect(Object.keys((await generator.getIndex()).entries)).toMatchInlineSnapshot(`
           Array [
             "a--story-one",
+            "componentreference--docs",
             "a--metaof",
             "notitle--docs",
             "a--second-docs",
@@ -978,6 +1003,7 @@ describe('StoryIndexGenerator', () => {
         expect(Object.keys((await generator.getIndex()).entries)).toMatchInlineSnapshot(`
           Array [
             "a--story-one",
+            "componentreference--story-one",
             "a--metaof",
             "notitle--story-one",
             "a--second-docs",
@@ -1037,6 +1063,7 @@ describe('StoryIndexGenerator', () => {
           "a--second-docs",
           "a--story-one",
           "second-nested-g--story-one",
+          "componentreference--docs",
           "notitle--docs",
           "first-nested-deeply-f--story-one",
         ]
@@ -1076,7 +1103,7 @@ describe('StoryIndexGenerator', () => {
         const generator = new StoryIndexGenerator([storiesSpecifier, docsSpecifier], options);
         await generator.initialize();
         await generator.getIndex();
-        expect(toId).toHaveBeenCalledTimes(5);
+        expect(toId).toHaveBeenCalledTimes(6);
 
         toIdMock.mockClear();
         await generator.getIndex();
@@ -1135,7 +1162,7 @@ describe('StoryIndexGenerator', () => {
         const generator = new StoryIndexGenerator([storiesSpecifier, docsSpecifier], options);
         await generator.initialize();
         await generator.getIndex();
-        expect(toId).toHaveBeenCalledTimes(5);
+        expect(toId).toHaveBeenCalledTimes(6);
 
         generator.invalidate(docsSpecifier, './src/docs2/Title.mdx', false);
 
@@ -1157,7 +1184,7 @@ describe('StoryIndexGenerator', () => {
         const generator = new StoryIndexGenerator([storiesSpecifier, docsSpecifier], options);
         await generator.initialize();
         await generator.getIndex();
-        expect(toId).toHaveBeenCalledTimes(5);
+        expect(toId).toHaveBeenCalledTimes(6);
 
         generator.invalidate(storiesSpecifier, './src/A.stories.js', false);
 
@@ -1257,7 +1284,7 @@ describe('StoryIndexGenerator', () => {
         const generator = new StoryIndexGenerator([docsSpecifier, storiesSpecifier], options);
         await generator.initialize();
         await generator.getIndex();
-        expect(toId).toHaveBeenCalledTimes(5);
+        expect(toId).toHaveBeenCalledTimes(6);
 
         expect(Object.keys((await generator.getIndex()).entries)).toContain('notitle--docs');
 
@@ -1279,7 +1306,7 @@ describe('StoryIndexGenerator', () => {
         const generator = new StoryIndexGenerator([docsSpecifier, storiesSpecifier], options);
         await generator.initialize();
         await generator.getIndex();
-        expect(toId).toHaveBeenCalledTimes(5);
+        expect(toId).toHaveBeenCalledTimes(6);
 
         expect(Object.keys((await generator.getIndex()).entries)).toContain('a--metaof');
 

code/lib/core-server/src/utils/StoryIndexGenerator.ts

@@ -212,31 +212,21 @@ export class StoryIndexGenerator {
   }
 
   findDependencies(absoluteImports: Path[]) {
-    const dependencies = [] as StoriesCacheEntry[];
-    const foundImports = new Set();
-    this.specifierToCache.forEach((cache) => {
-      const fileNames = Object.keys(cache).filter((fileName) => {
-        const foundImport = absoluteImports.find((storyImport) => fileName.startsWith(storyImport));
-        if (foundImport) foundImports.add(foundImport);
-        return !!foundImport;
-      });
-      fileNames.forEach((fileName) => {
-        const cacheEntry = cache[fileName];
-        if (cacheEntry && cacheEntry.type === 'stories') {
-          dependencies.push(cacheEntry);
-        } else {
-          throw new Error(`Unexpected dependency: ${cacheEntry}`);
-        }
-      });
-    });
-
-    // imports can include non-story imports, so it's ok if
-    // there are fewer foundImports than absoluteImports
-    // if (absoluteImports.length !== foundImports.size) {
-    //   throw new Error(`Missing dependencies: ${absoluteImports.filter((p) => !foundImports.has(p))}`));
-    // }
-
-    return dependencies;
+    return [...this.specifierToCache.values()].flatMap((cache: SpecifierStoriesCache) =>
+      Object.entries(cache)
+        .filter(([fileName, cacheEntry]) => {
+          // We are only interested in stories cache entries (and assume they've been processed already)
+          // If we found a match in the cache that's still null or not a stories file,
+          // it is a docs file and it isn't a dependency / storiesImport.
+          // See https://github.com/storybookjs/storybook/issues/20958
+          if (!cacheEntry || cacheEntry.type !== 'stories') return false;
+
+          return !!absoluteImports.find((storyImport) =>
+            fileName.match(new RegExp(`^${storyImport}(\\.[^.]+)?$`))
+          );
+        })
+        .map(([_, cacheEntry]) => cacheEntry as StoriesCacheEntry)
+    );
   }
 
   async extractStories(specifier: NormalizedStoriesSpecifier, absolutePath: Path) {

code/lib/core-server/src/utils/__mockdata__/src/A.js

@@ -0,0 +1,2 @@
+// This could be the component for `A.stories.js`
+export const A = {};

code/lib/core-server/src/utils/__mockdata__/src/docs2/ComponentReference.js

@@ -0,0 +1,2 @@
+// This a component that happens to have the same name as an MDX file referencing it
+export const ComponentReference = {};

code/lib/core-server/src/utils/__mockdata__/src/docs2/ComponentReference.mdx

@@ -0,0 +1,5 @@
+{/* This will overlap with ComponentReference.mdx (this file). There's not much we can do about this */} 
+import ComponentReference from './ComponentReference';
+
+{/* This prefixes A.stories.ts, we need to make sure we don't get confused. */} 
+import { A } from '../A';

code/lib/core-server/src/utils/stories-json.test.ts

@@ -177,6 +177,17 @@ describe('useStoriesJson', () => {
               "title": "D",
               "type": "story",
             },
+            "docs2-componentreference--docs": Object {
+              "id": "docs2-componentreference--docs",
+              "importPath": "./src/docs2/ComponentReference.mdx",
+              "name": "docs",
+              "storiesImports": Array [],
+              "tags": Array [
+                "docs",
+              ],
+              "title": "docs2/ComponentReference",
+              "type": "docs",
+            },
             "docs2-notitle--docs": Object {
               "id": "docs2-notitle--docs",
               "importPath": "./src/docs2/NoTitle.mdx",
@@ -367,6 +378,23 @@ describe('useStoriesJson', () => {
               ],
               "title": "D",
             },
+            "docs2-componentreference--docs": Object {
+              "id": "docs2-componentreference--docs",
+              "importPath": "./src/docs2/ComponentReference.mdx",
+              "kind": "docs2/ComponentReference",
+              "name": "docs",
+              "parameters": Object {
+                "__id": "docs2-componentreference--docs",
+                "docsOnly": true,
+                "fileName": "./src/docs2/ComponentReference.mdx",
+              },
+              "storiesImports": Array [],
+              "story": "docs",
+              "tags": Array [
+                "docs",
+              ],
+              "title": "docs2/ComponentReference",
+            },
             "docs2-notitle--docs": Object {
               "id": "docs2-notitle--docs",
               "importPath": "./src/docs2/NoTitle.mdx",
@@ -655,6 +683,7 @@ describe('useStoriesJson', () => {
       expect(send).toHaveBeenCalledTimes(1);
       expect(send.mock.calls[0][0]).toMatchInlineSnapshot(`
         "Unable to index files:
+        - ./src/docs2/ComponentReference.mdx: You cannot use \`.mdx\` files without using \`storyStoreV7\`.
         - ./src/docs2/MetaOf.mdx: You cannot use \`.mdx\` files without using \`storyStoreV7\`.
         - ./src/docs2/NoTitle.mdx: You cannot use \`.mdx\` files without using \`storyStoreV7\`.
         - ./src/docs2/SecondMetaOf.mdx: You cannot use \`.mdx\` files without using \`storyStoreV7\`.