FIX: Establish working production release signing

android/app/build.gradle.kts

@@ -1,11 +1,48 @@
+import java.io.FileInputStream
+import java.util.Properties
+
 plugins {
     id("com.android.application")
-    // The Flutter Gradle Plugin must be applied after the Android and Kotlin Gradle plugins.
     id("dev.flutter.flutter-gradle-plugin")
+    id("com.google.gms.google-services")
 }
 
+val keystoreProperties = Properties()
+val keystorePropertiesFile = rootProject.file("key.properties")
+
+if (!keystorePropertiesFile.exists()) {
+    throw GradleException(
+        "Missing android/key.properties. " +
+        "Create it from android/key.properties.template."
+    )
+}
+
+FileInputStream(keystorePropertiesFile).use {
+    keystoreProperties.load(it)
+}
+
+fun requiredKeystoreProperty(name: String): String {
+    val value = keystoreProperties.getProperty(name)?.trim()
+
+    println("MotorSignal signing property [$name]: ${if (value.isNullOrEmpty()) "<MISSING>" else "<PRESENT>"}")
+
+    if (value.isNullOrEmpty()) {
+        println("Properties actually loaded by Gradle: ${keystoreProperties.keys}")
+        throw GradleException(
+            "Missing $name in android/key.properties"
+        )
+    }
+
+    return value
+}
+
+val releaseStorePassword = requiredKeystoreProperty("storePassword")
+val releaseKeyPassword = requiredKeystoreProperty("keyPassword")
+val releaseKeyAlias = requiredKeystoreProperty("keyAlias")
+val releaseStoreFile = requiredKeystoreProperty("storeFile")
+
 android {
-    namespace = "com.example.motorcycle_dash"
+    namespace = "app.motorsignal.motorcycle"
     compileSdk = 37
     ndkVersion = flutter.ndkVersion
 
@@ -15,25 +52,30 @@ android {
     }
 
     defaultConfig {
-        // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
-        applicationId = "com.example.motorcycle_dash"
-        // You can update the following values to match your application needs.
-        // For more information, see: https://flutter.dev/to/review-gradle-config.
+        applicationId = "app.motorsignal.motorcycle"
         minSdk = flutter.minSdkVersion
         targetSdk = flutter.targetSdkVersion
         versionCode = flutter.versionCode
         versionName = flutter.versionName
     }
 
-    buildTypes {
-        release {
-            // TODO: Add your own signing config for the release build.
-            // Signing with the debug keys for now, so `flutter run --release` works.
-            signingConfig = signingConfigs.getByName("debug")
-        }
+    signingConfigs {
+    create("release") {
+        keyAlias = releaseKeyAlias
+        keyPassword = releaseKeyPassword
+        storePassword = releaseStorePassword
+        storeFile = rootProject.file(releaseStoreFile)
+        storeType = "PKCS12"
     }
 }
 
+    buildTypes {
+    release {
+        signingConfig = signingConfigs.getByName("release")
+    }
+}
+}
+
 kotlin {
     compilerOptions {
         jvmTarget = org.jetbrains.kotlin.gradle.dsl.JvmTarget.JVM_17

android/key.properties.template

@@ -0,0 +1,7 @@
+# MotorSignal Android Production Signing Key Configuration Template
+# Copy this file to `android/key.properties` (which is gitignored) and fill with your actual keystore details.
+
+storePassword=YOUR_KEYSTORE_PASSWORD
+keyPassword=YOUR_KEY_PASSWORD
+keyAlias=motorsignal_upload_key
+storeFile=../upload-keystore.jks