fix(core): correctly handle package index paths

Author: tgreyuk

.changeset/forty-onions-relate.md

@@ -0,0 +1,5 @@
+---
+'typedoc-plugin-markdown': patch
+---
+
+- Correctly handle package index paths (#782).

packages/typedoc-plugin-markdown/src/libs/utils/replace-file-name.ts

@@ -1,3 +1,10 @@
+import * as path from 'path';
+
 export function replaceFilename(originalPath: string, newFileName: string) {
-  return originalPath.replace(/\/[^/]+(\.[^/.]+)$/, `/${newFileName}$1`);
+  const normalizedPath = originalPath.replace(/\\/g, '/');
+  const updatedPath = normalizedPath.replace(
+    /\/[^/]+(\.[^/.]+)$/,
+    `${path.sep}${newFileName}$1`,
+  );
+  return path.sep === '\\' ? updatedPath.replace(/\//g, '\\') : updatedPath;
 }

packages/typedoc-plugin-markdown/src/theme/context/partials/page.packagesIndex.ts

@@ -60,23 +60,12 @@ export function packagesIndex(
 
 function getPackageLink(
   context: MarkdownThemeContext,
-  reflection: DeclarationReflection,
+  projectPackage: DeclarationReflection,
 ) {
-  const packageEntryModule = context.router.getPackageEntryModule(reflection);
-
-  if (packageEntryModule) {
-    return context.urlTo(packageEntryModule);
-  }
-
-  if (reflection.readme?.length && !context.options.getValue('mergeReadme')) {
-    return replaceFilename(
-      context.urlTo(reflection),
-      context.router.getModulesFileName(reflection),
-    );
-  }
-
-  return replaceFilename(
-    context.urlTo(reflection),
-    context.router.getPackageEntryFileName(reflection) || '',
-  );
+  return projectPackage.readme
+    ? replaceFilename(
+        context.urlTo(projectPackage),
+        context.router.getPackageEntryFileName(projectPackage) || '',
+      )
+    : context.urlTo(projectPackage);
 }