fix: support sync getInitialURL in native useLinking

packages/native/src/types.tsx

@@ -67,7 +67,11 @@ export type LinkingOptions = {
    * }
    * ```
    */
-  getInitialURL?: () => Promise<string | null | undefined>;
+  getInitialURL?: () =>
+    | string
+    | null
+    | undefined
+    | Promise<string | null | undefined>;
   /**
    * Custom function to get subscribe to URL updates.
    * Uses `Linking.addEventListener('url', callback)` by default.

packages/native/src/useLinking.native.tsx

@@ -8,6 +8,8 @@ import {
 import escapeStringRegexp from 'escape-string-regexp';
 import type { LinkingOptions } from './types';
 
+type ResultState = ReturnType<typeof getStateFromPathDefault>;
+
 let isUsingLinking = false;
 
 export default function useLinking(
@@ -96,19 +98,39 @@ export default function useLinking(
     return undefined;
   }, []);
 
-  const getInitialState = React.useCallback(async () => {
-    if (!enabledRef.current) {
-      return undefined;
+  const getInitialState = React.useCallback(() => {
+    let state: ResultState | undefined;
+
+    if (enabledRef.current) {
+      const url = getInitialURLRef.current();
+
+      if (url != null && typeof url !== 'string') {
+        return url.then((url) => {
+          const path = url ? extractPathFromURL(url) : null;
+
+          return path
+            ? getStateFromPathRef.current(path, configRef.current)
+            : undefined;
+        });
+      }
+
+      const path = url ? extractPathFromURL(url) : null;
+
+      state = path
+        ? getStateFromPathRef.current(path, configRef.current)
+        : undefined;
     }
 
-    const url = await getInitialURLRef.current();
-    const path = url ? extractPathFromURL(url) : null;
+    const thenable = {
+      then(onfulfilled?: (state: ResultState | undefined) => void) {
+        return Promise.resolve(onfulfilled ? onfulfilled(state) : state);
+      },
+      catch() {
+        return thenable;
+      },
+    };
 
-    if (path) {
-      return getStateFromPathRef.current(path, configRef.current);
-    } else {
-      return undefined;
-    }
+    return thenable as PromiseLike<ResultState | undefined>;
   }, [extractPathFromURL]);
 
   React.useEffect(() => {

packages/native/src/useLinking.tsx

@@ -352,7 +352,6 @@ export default function useLinking(
       }
     }
 
-    // Make it a thenable to keep consistent with the native impl
     const thenable = {
       then(onfulfilled?: (state: ResultState | undefined) => void) {
         return Promise.resolve(onfulfilled ? onfulfilled(value) : value);