fix: repair builder closure mutating same path reference

.changeset/wet-beers-yell.md

@@ -0,0 +1,5 @@
+---
+"next-safe-navigation": patch
+---
+
+Fix route builder closure mutating same path string

src/make-route-builder.spec.ts

@@ -145,6 +145,22 @@ describe('makeRouteBuilder', () => {
         });
       });
     });
+
+    describe('when the builder is called multiple times', () => {
+      it('replaces correctly the path params with the latest value', () => {
+        const builder = makeRouteBuilder('/organizations/[orgId]', {
+          params: z.object({
+            orgId: z.string(),
+          }),
+        });
+
+        expect(builder({ orgId: 'org_123' })).toBe('/organizations/org_123');
+
+        expect(builder({ orgId: 'org_456' })).toBe('/organizations/org_456');
+
+        expect(builder({ orgId: 'org_789' })).toBe('/organizations/org_789');
+      });
+    });
   });
 
   describe('for a path with route params and searchParams', () => {

src/make-route-builder.ts

@@ -101,10 +101,8 @@ export function makeRouteBuilder(
   path: PathBlueprint,
   schemas?: { params?: z.ZodSchema; search?: z.ZodSchema },
 ): any {
-  let basePath: string = path;
-
   if (!path.startsWith('/')) {
-    basePath = `/${path}`;
+    path = `/${path}`;
   }
 
   const hasParamsInPath = /\[\w+\]/g.test(path);
@@ -115,6 +113,8 @@ export function makeRouteBuilder(
   }
 
   const routeBuilder: RouteBuilder<any, any> = (options) => {
+    let basePath: string = path;
+
     const { search = {}, ...params } = options ?? {};
 
     for (const [param, value] of Object.entries(params)) {