feat: Add enableCodeScanner to Expo Config Plugin

docs/docs/guides/CODE_SCANNING.mdx

@@ -30,7 +30,18 @@ A Code Scanner is a separate Camera output (just like photo or video) that can d
 
 On iOS, the Code Scanner uses the platform-native APIs and can be used out of the box.
 
-On Android, the [MLKit Vision Barcode Scanning](https://developers.google.com/ml-kit/vision/barcode-scanning) API will be used, and the model (2.2MB) needs to be downloaded first. To download the model when the user installs your app, add this to your `AndroidManifest.xml` file:
+On Android, the [MLKit Vision Barcode Scanning](https://developers.google.com/ml-kit/vision/barcode-scanning) API will be used, and the model (2.2MB) needs to be downloaded first.
+
+<Tabs
+  groupId="environment"
+  defaultValue="rn"
+  values={[
+    {label: 'React Native', value: 'rn'},
+    {label: 'Expo', value: 'expo'}
+  ]}>
+<TabItem value="rn">
+
+To download the model when the user installs your app, add this to your `AndroidManifest.xml` file:
 
 ```xml
 <application ...>
@@ -41,6 +52,29 @@ On Android, the [MLKit Vision Barcode Scanning](https://developers.google.com/ml
 </application>
 ```
 
+</TabItem>
+<TabItem value="expo">
+
+To download the model when the user installs your app, add the `enableCodeScanner` flag to your Expo config (`app.json`, `app.config.json` or `app.config.js`):
+
+```json
+{
+  "name": "my app",
+  "plugins": [
+    [
+      "react-native-vision-camera",
+      {
+        // ...
+        "enableCodeScanner": true
+      }
+    ]
+  ]
+}
+```
+
+</TabItem>
+</Tabs>
+
 ## Usage
 
 To use a codescanner, simply create a [`CodeScanner`](/docs/api/interfaces/CodeScanner) and pass it to the `<Camera>`:

package/src/expo-plugin/withVisionCamera.ts

@@ -9,10 +9,36 @@ const CAMERA_USAGE = 'Allow $(PRODUCT_NAME) to access your camera'
 const MICROPHONE_USAGE = 'Allow $(PRODUCT_NAME) to access your microphone'
 
 type Props = {
+  /**
+   * The text to show in the native dialog when asking for Camera Permissions.
+   * @default 'Allow $(PRODUCT_NAME) to access your camera'
+   */
   cameraPermissionText?: string
+  /**
+   * Whether to add Microphone Permissions to the native manifest or not.
+   * @default false
+   */
   enableMicrophonePermission?: boolean
+  /**
+   * The text to show in the native dialog when asking for Camera Permissions.
+   * @default 'Allow $(PRODUCT_NAME) to access your microphone'
+   */
   microphonePermissionText?: string
+  /**
+   * Whether to enable the Frame Processors runtime, or explicitly disable it.
+   * Disabling Frame Processors will make your app smaller as the C++ files will not be compiled.
+   * See [Frame Processors](https://www.react-native-vision-camera.com/docs/guides/frame-processors)
+   * @default false
+   */
   disableFrameProcessors?: boolean
+  /**
+   * Whether to enable the QR/Barcode Scanner Model. If true, the MLKit Model will
+   * automatically be downloaded on app startup. If false, it will be downloaded
+   * once the Camera is created with a `CodeScanner`.
+   * See [QR/Barcode Scanning](https://www.react-native-vision-camera.com/docs/guides/code-scanning)
+   * @default false
+   */
+  enableCodeScanner?: boolean
 }
 
 const withCamera: ConfigPlugin<Props> = (config, props = {}) => {
@@ -32,7 +58,12 @@ const withCamera: ConfigPlugin<Props> = (config, props = {}) => {
     config = withDisableFrameProcessorsIOS(config)
   }
 
-  return withPlugins(config, [[AndroidConfig.Permissions.withPermissions, androidPermissions], withAndroidMLKitVisionModel])
+  if (props.enableCodeScanner) {
+    // Adds meta download-request tag to AndroidManifest
+    config = withAndroidMLKitVisionModel(config)
+  }
+
+  return withPlugins(config, [[AndroidConfig.Permissions.withPermissions, androidPermissions]])
 }
 
 export default createRunOncePlugin(withCamera, pkg.name, pkg.version)