fix(android): generate version for ReactNativeFirebaseAppRegistrar.java (#3766)

* build(android): script for version

* chore(android): rm ReactNativeFirebaseAppRegistrar

* build(android): create new version class

* chore(android): update script file name

* chore(app, android): formatting

Co-authored-by: Mike Diarmid <mike.diarmid@gmail.com>
[publish]

.gitignore

@@ -549,8 +549,9 @@ tests/ios/resetXcode.sh
 google-services.json
 GoogleService-Info.plist
 
-# generated file
+# generated files
 RNFBVersion.m
+ReactNativeFirebaseVersion.java
 
 appPlaygrounds/
 app.playground.js

packages/app/android/src/reactnative/java/io/invertase/firebase/app/ReactNativeFirebaseAppRegistrar.java

@@ -26,17 +26,15 @@ import com.google.firebase.platforminfo.LibraryVersionComponent;
 import java.util.Collections;
 import java.util.List;
 
-import io.invertase.firebase.BuildConfig;
-
 @Keep
 public class ReactNativeFirebaseAppRegistrar implements ComponentRegistrar {
   @Override
   public List<Component<?>> getComponents() {
-    return Collections.singletonList(
-      LibraryVersionComponent.create(
-        "react-native-firebase",
-        BuildConfig.VERSION_NAME
-      )
-    );
+    return Collections
+        .singletonList(
+            LibraryVersionComponent.create(
+                "react-native-firebase", 
+                ReactNativeFirebaseVersion.VERSION
+        ));
   }
 }

packages/app/package.json

@@ -6,7 +6,8 @@
   "main": "lib/index.js",
   "types": "lib/index.d.ts",
   "scripts": {
-    "build": "genversion --semi lib/version.js && node ./scripts/genversion-ios",
+    "build": "genversion --semi lib/version.js && npm run build:version",
+    "build:version": "node ./scripts/genversion-ios && node ./scripts/genversion-android",
     "build:clean": "rimraf android/build && rimraf ios/build",
     "prepare": "npm run build"
   },

packages/app/scripts/genversion-android.js

@@ -0,0 +1,36 @@
+const fs = require('fs');
+const path = require('path');
+
+const version = require('../lib/version');
+const outputPath = path.resolve(
+  __dirname,
+  '..',
+  'android',
+  'src/reactnative/java/io/invertase/firebase/app',
+  'ReactNativeFirebaseVersion.java',
+);
+const template = `
+package io.invertase.firebase.app;
+/*
+ * Copyright (c) 2016-present Invertase Limited & Contributors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this library except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+// generated file - do not modify or commit
+public class ReactNativeFirebaseVersion {
+  public static String VERSION = "version_number";
+}
+`;
+
+fs.writeFileSync(outputPath, template.replace('version_number', `${version}`), 'utf8');