Confirm the iOS platform folder exists before attempting to pull in iOS file

plugin.xml

@@ -20,12 +20,6 @@ xmlns:android="http://schemas.android.com/apk/res/android">
 				<param name="onload" value="true" />
 			</feature>
 		</config-file>
-		<config-file parent="/resources" target="res/values/strings.xml">
-			<string name="google_app_id">@string/google_app_id</string>
-		</config-file>
-		<config-file parent="/resources" target="res/values/strings.xml">
-			<string name="google_api_key">@string/google_api_key</string>
-		</config-file>
 		<config-file target="AndroidManifest.xml" parent="/*">
 				<uses-permission android:name="android.permission.INTERNET" />
 				<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
@@ -47,21 +41,20 @@ xmlns:android="http://schemas.android.com/apk/res/android">
 			</service>
 			<receiver android:name="org.apache.cordova.firebase.OnNotificationOpenReceiver"></receiver>
 		</config-file>
-		<source-file src="src/android/google-services.json" target-dir="." />
 		<source-file src="src/android/FirebasePlugin.java" target-dir="src/org/apache/cordova/firebase" />
 		<source-file src="src/android/OnNotificationOpenReceiver.java" target-dir="src/org/apache/cordova/firebase" />
 		<source-file src="src/android/FirebasePluginInstanceIDService.java" target-dir="src/org/apache/cordova/firebase" />
 		<source-file src="src/android/FirebasePluginMessagingService.java" target-dir="src/org/apache/cordova/firebase" />
 		<source-file src="src/android/colors.xml" target-dir="res/values" />
 
 		<framework src="src/android/build.gradle" custom="true" type="gradleReference" />
-		<framework src="com.google.gms:google-services:+" />
-		<framework src="com.google.android.gms:play-services-tagmanager:+" />
-		<framework src="com.google.firebase:firebase-core:+" />
-		<framework src="com.google.firebase:firebase-messaging:+" />
-		<framework src="com.google.firebase:firebase-crash:+" />
-		<framework src="com.google.firebase:firebase-config:+" />
-		<framework src="com.google.firebase:firebase-perf:+" />
+		<framework src="com.google.gms:google-services:3.1.1" />
+		<framework src="com.google.android.gms:play-services-tagmanager:16.0.4" />
+		<framework src="com.google.firebase:firebase-core:16.0.4" />
+		<framework src="com.google.firebase:firebase-messaging:17.3.4" />
+		<framework src="com.google.firebase:firebase-crash:16.2.1" />
+		<framework src="com.google.firebase:firebase-config:16.1.0" />
+		<framework src="com.google.firebase:firebase-perf:16.2.0" />
 
 	</platform>
 
@@ -81,7 +74,7 @@ xmlns:android="http://schemas.android.com/apk/res/android">
 		<config-file parent="aps-environment" target="*/Entitlements-Release.plist">
 			<string>production</string>
 		</config-file>
-
+		
 		<resource-file src="src/ios/GoogleService-Info.plist" />
 
 		<header-file src="src/ios/AppDelegate+FirebasePlugin.h" />
@@ -115,4 +108,5 @@ xmlns:android="http://schemas.android.com/apk/res/android">
 	</platform>
 
 	<hook src="scripts/after_prepare.js" type="after_prepare" />
+	<hook src="scripts/after_plugin_install.js" type="after_plugin_install" />
 </plugin>

scripts/after_plugin_install.js

@@ -0,0 +1,21 @@
+#!/usr/bin/env node
+'use strict';
+
+var fs = require('fs');
+
+function directoryExists(path) {
+    try {
+        return fs.statSync(path).isDirectory();
+    } catch (e) {
+        return false;
+    }
+}
+
+if (directoryExists('platforms/ios')) {
+	fs.unlinkSync('./plugins/cordova-plugin-firebase/src/ios/GoogleService-Info.plist');
+
+	fs.writeFileSync('./plugins/cordova-plugin-firebase/src/ios/GoogleService-Info.plist', fs.readFileSync('./GoogleService-Info.plist'));
+}
+module.exports = function (context) {
+  require('./after_prepare')(context);
+};

scripts/after_prepare.js

@@ -56,20 +56,16 @@ function updateStringsXml(contents) {
     var json = JSON.parse(contents);
     var strings = fs.readFileSync(PLATFORM.ANDROID.stringsXml).toString();
 
-    // strip non-default value
-    strings = strings.replace(new RegExp('<string name="google_app_id">([^\@<]+?)</string>', 'i'), '');
-
-    // strip non-default value
-    strings = strings.replace(new RegExp('<string name="google_api_key">([^\@<]+?)</string>', 'i'), '');
-
     // strip empty lines
     strings = strings.replace(new RegExp('(\r\n|\n|\r)[ \t]*(\r\n|\n|\r)', 'gm'), '$1');
 
-    // replace the default value
-    strings = strings.replace(new RegExp('<string name="google_app_id">([^<]+?)</string>', 'i'), '<string name="google_app_id">' + json.client[0].client_info.mobilesdk_app_id + '</string>');
-
-    // replace the default value
-    strings = strings.replace(new RegExp('<string name="google_api_key">([^<]+?)</string>', 'i'), '<string name="google_api_key">' + json.client[0].api_key[0].current_key + '</string>');
+    // after_prepare is run multiple times, and duplicate strings causes a build error
+    if (~strings.indexOf('google_app_id')) {
+      return;
+    }
+
+    // insert values from json
+    strings = strings.replace('</resources>', '<string name="google_app_id">' + json.client[0].client_info.mobilesdk_app_id + '</string><string name="google_api_key">' + json.client[0].api_key[0].current_key + '</string></resources>');
 
     fs.writeFileSync(PLATFORM.ANDROID.stringsXml, strings);
 }
@@ -128,14 +124,14 @@ function directoryExists(path) {
 
 module.exports = function(context) {
   //get platform from the context supplied by cordova
-  var platforms = context.opts.platforms;
+  var platforms = context.opts.platforms || context.opts.cordova.platforms;
   // Copy key files to their platform specific folders
   if (platforms.indexOf('ios') !== -1 && directoryExists(IOS_DIR)) {
-    console.log('Preparing Firebase on iOS');
-    copyKey(PLATFORM.IOS);
+    //console.log('Preparing Firebase on iOS');
+    //copyKey(PLATFORM.IOS);
   }
   if (platforms.indexOf('android') !== -1 && directoryExists(ANDROID_DIR)) {
     console.log('Preparing Firebase on Android');
     copyKey(PLATFORM.ANDROID, updateStringsXml)
   }
-};
+};