fix: in sortRoutePaths: sort files alphabetically (#3769)

Closes #3773

---------

Co-authored-by: Bartek Iwańczuk <biwanczuk@gmail.com>
Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: 3 people

packages/fresh/src/fs_routes.ts

@@ -246,8 +246,7 @@ export function sortRoutePaths(a: string, b: string) {
       const scoreB = getRoutePathScore(charB, b, bIdx);
       if (scoreA === scoreB) {
         if (charA !== charB) {
-          // TODO: Do we need localeSort here or is this good enough?
-          return charA < charB ? 0 : 1;
+          return charA < charB ? -1 : 1;
         }
         continue;
       }
@@ -256,8 +255,7 @@ export function sortRoutePaths(a: string, b: string) {
     }
 
     if (charA !== charB) {
-      // TODO: Do we need localeSort here or is this good enough?
-      return charA < charB ? 0 : 1;
+      return charA < charB ? -1 : 1;
     }
 
     // If we're at the end of A or B, then we assume that the longer
@@ -292,8 +290,9 @@ function getRoutePathScore(char: string, s: string, i: number): number {
   }
 
   if (
-    i + 4 === s.length - 1 && char === "i" && s[i + 1] === "n" &&
-    s[i + 2] === "d" && s[i + 3] === "e" && s[i + 4] === "x"
+    char === "i" && s[i + 1] === "n" &&
+    s[i + 2] === "d" && s[i + 3] === "e" && s[i + 4] === "x" &&
+    (i + 4 === s.length - 1 || s[i + 5] === ".")
   ) {
     return 3;
   }

packages/fresh/src/fs_routes_test.tsx

@@ -1315,6 +1315,8 @@ Deno.test("fsRoutes - sortRoutePaths with groups", () => {
 
   routes = [
     "/_app",
+    "/app",
+    "/app/_middleware",
     "/(authed)/_middleware",
     "/(authed)/_layout",
     "/_error",
@@ -1325,26 +1327,71 @@ Deno.test("fsRoutes - sortRoutePaths with groups", () => {
     "/(authed)/(account)/account",
     "/(authed)/api/slug",
     "/hooks/github",
+    "/(authed)/[org]/__foo",
     "/(authed)/[org]/_middleware",
     "/(authed)/[org]/index",
   ];
+  routes.sort(() => Math.random() > 0.5 ? -1 : 1);
   routes.sort(sortRoutePaths);
   sorted = [
     "/_app",
     "/_error",
-    "/login",
+    "/app/_middleware",
+    "/app",
     "/auth/login",
     "/auth/logout",
     "/hooks/github",
+    "/login",
     "/(authed)/_middleware",
     "/(authed)/_layout",
     "/(authed)/index",
     "/(authed)/api/slug",
     "/(authed)/(account)/account",
     "/(authed)/[org]/_middleware",
+    "/(authed)/[org]/__foo",
     "/(authed)/[org]/index",
   ];
   expect(routes).toEqual(sorted);
+
+  routes = [
+    "/_app.js",
+    "/app.tsx",
+    "/app/_middleware.tsx",
+    "/(authed)/_middleware.tsx",
+    "/(authed)/_layout.jsx",
+    "/_error.tsx",
+    "/(authed)/index.js",
+    "/login.js",
+    "/auth/logout.tsx",
+    "/auth/login.ts",
+    "/(authed)/(account)/account.tsx",
+    "/(authed)/api/slug.js",
+    "/hooks/github.js",
+    "/(authed)/[org]/__foo.js",
+    "/(authed)/[org]/_middleware.tsx",
+    "/(authed)/[org]/index.ts",
+  ];
+  routes.sort(() => Math.random() > 0.5 ? -1 : 1);
+  routes.sort(sortRoutePaths);
+  sorted = [
+    "/_app.js",
+    "/_error.tsx",
+    "/app/_middleware.tsx",
+    "/app.tsx",
+    "/auth/login.ts",
+    "/auth/logout.tsx",
+    "/hooks/github.js",
+    "/login.js",
+    "/(authed)/_middleware.tsx",
+    "/(authed)/_layout.jsx",
+    "/(authed)/index.js",
+    "/(authed)/api/slug.js",
+    "/(authed)/(account)/account.tsx",
+    "/(authed)/[org]/_middleware.tsx",
+    "/(authed)/[org]/__foo.js",
+    "/(authed)/[org]/index.ts",
+  ];
+  expect(routes).toEqual(sorted);
 });
 
 Deno.test("fsRoutes - registers default GET route for component without GET handler", async () => {