feat: add support for nextjs private folders (#31)

feat: add support for nextjs private folders

Author: leepowellnbs

lib/constants/next-js-naming-convention.js

@@ -30,7 +30,12 @@ const NEXT_JS_ROUTE_GROUPS = `\\(${KEBAB_CASE}\\)`;
  */
 const NEXT_JS_NAMED_SLOTS = `\\@${KEBAB_CASE}`;
 
+/**
+ * @example \_components
+ */
+const NEXT_JS_PRIVATE_FOLDERS = `\\_${KEBAB_CASE}`;
+
 /**
  * @example app, [helpPageId], [...auth], [[...auth]], (auth), \@feed
  */
-export const NEXT_JS_APP_ROUTER_CASE = `@(${KEBAB_CASE}|${NEXT_JS_DYNAMIC_SEGMENTS}|${NEXT_JS_CATCH_ALL_SEGMENTS}|${NEXT_JS_OPTIONAL_CATCH_ALL_SEGMENTS}|${NEXT_JS_ROUTE_GROUPS}|${NEXT_JS_NAMED_SLOTS})`;
+export const NEXT_JS_APP_ROUTER_CASE = `@(${KEBAB_CASE}|${NEXT_JS_DYNAMIC_SEGMENTS}|${NEXT_JS_CATCH_ALL_SEGMENTS}|${NEXT_JS_OPTIONAL_CATCH_ALL_SEGMENTS}|${NEXT_JS_ROUTE_GROUPS}|${NEXT_JS_NAMED_SLOTS}|${NEXT_JS_PRIVATE_FOLDERS})`;

tests/lib/rules/folder-naming-convention.posix.js

@@ -408,6 +408,11 @@ ruleTester.run(
         filename: 'src/app/(marketing)/page.ts',
         options: [{ 'src/**/': 'NEXT_JS_APP_ROUTER_CASE' }],
       },
+      {
+        code: "var foo = 'bar';",
+        filename: 'src/app/_components/page.ts',
+        options: [{ 'src/**/': 'NEXT_JS_APP_ROUTER_CASE' }],
+      },
     ],
 
     invalid: [

tests/lib/rules/folder-naming-convention.windows.js

@@ -411,6 +411,11 @@ ruleTester.run(
         filename: 'src\\app\\(marketing)\\page.ts',
         options: [{ 'src/**/': 'NEXT_JS_APP_ROUTER_CASE' }],
       },
+      {
+        code: "var foo = 'bar';",
+        filename: 'src\\app\\_components\\page.ts',
+        options: [{ 'src/**/': 'NEXT_JS_APP_ROUTER_CASE' }],
+      },
     ],
 
     invalid: [