[9.x] Add manifestHash function to Illuminate\Foundation\Vite

src/Illuminate/Foundation/Vite.php

@@ -536,6 +536,26 @@ protected function manifestPath($buildDirectory)
         return public_path($buildDirectory.'/manifest.json');
     }
 
+    /**
+     * Get a unique hash representing the current manifest, or null if there is no manifest.
+     *
+     * @return string|null
+     */
+    public function manifestHash($buildDirectory = null)
+    {
+        $buildDirectory ??= $this->buildDirectory;
+
+        if ($this->isRunningHot()) {
+            return null;
+        }
+
+        if (! is_file($path = $this->manifestPath($buildDirectory))) {
+            return null;
+        }
+
+        return md5_file($path) ?: null;
+    }
+
     /**
      * Get the chunk for the given entry point / asset.
      *

src/Illuminate/Support/Facades/Vite.php

@@ -5,6 +5,7 @@
 /**
  * @method static string useCspNonce(?string $nonce = null)
  * @method static string|null cspNonce()
+ * @method static string|null manifestHash(?string $buildDirectory = null)
  * @method static string asset(string $asset, string|null $buildDirectory)
  * @method static string hotFile()
  * @method static \Illuminate\Foundation\Vite useBuildDirectory(string $path)

tests/Foundation/FoundationViteTest.php

@@ -535,6 +535,36 @@ public function testItThrowsWhenUnableToFindAssetChunkInBuildMode()
         ViteFacade::asset('resources/js/missing.js');
     }
 
+    public function testItDoesNotReturnHashInDevMode()
+    {
+        $this->makeViteHotFile();
+
+        $this->assertNull(ViteFacade::manifestHash());
+
+        $this->cleanViteHotFile();
+    }
+
+    public function testItGetsHashInBuildMode()
+    {
+        $this->makeViteManifest(['a.js' => ['src' => 'a.js']]);
+
+        $this->assertSame('98ca5a789544599b562c9978f3147a0f', ViteFacade::manifestHash());
+
+        $this->cleanViteManifest();
+    }
+
+    public function testItGetsDifferentHashesForDifferentManifestsInBuildMode()
+    {
+        $this->makeViteManifest(['a.js' => ['src' => 'a.js']]);
+        $this->makeViteManifest(['b.js' => ['src' => 'b.js']], 'admin');
+
+        $this->assertSame('98ca5a789544599b562c9978f3147a0f', ViteFacade::manifestHash());
+        $this->assertSame('928a60835978bae84e5381fbb08a38b2', ViteFacade::manifestHash('admin'));
+
+        $this->cleanViteManifest();
+        $this->cleanViteManifest('admin');
+    }
+
     public function testViteCanSetEntryPointsWithFluentBuilder()
     {
         $this->makeViteManifest();