release apk

android/app/build.gradle.kts

@@ -1,3 +1,5 @@
+import java.util.Properties
+
 plugins {
     id("com.android.application")
     id("kotlin-android")
@@ -5,6 +7,28 @@ plugins {
     id("dev.flutter.flutter-gradle-plugin")
 }
 
+val keystoreProperties = Properties()
+val keystorePropertiesFile = rootProject.file("key.properties")
+if (keystorePropertiesFile.exists()) {
+    keystorePropertiesFile.inputStream().use { keystoreProperties.load(it) }
+}
+
+val releaseStoreFile = System.getenv("ANDROID_KEYSTORE_PATH")
+    ?: keystoreProperties.getProperty("storeFile")
+val releaseStorePassword = System.getenv("ANDROID_KEYSTORE_PASSWORD")
+    ?: keystoreProperties.getProperty("storePassword")
+val releaseKeyAlias = System.getenv("ANDROID_KEY_ALIAS")
+    ?: keystoreProperties.getProperty("keyAlias")
+val releaseKeyPassword = System.getenv("ANDROID_KEY_PASSWORD")
+    ?: keystoreProperties.getProperty("keyPassword")
+
+val hasReleaseKeystore = listOf(
+    releaseStoreFile,
+    releaseStorePassword,
+    releaseKeyAlias,
+    releaseKeyPassword
+).all { !it.isNullOrBlank() }
+
 android {
     namespace = "com.example.mileograph_flutter"
     compileSdk = flutter.compileSdkVersion
@@ -30,11 +54,21 @@ android {
         versionName = flutter.versionName
     }
 
+    signingConfigs {
+        if (hasReleaseKeystore) {
+            create("release") {
+                storeFile = file(releaseStoreFile!!)
+                storePassword = releaseStorePassword
+                keyAlias = releaseKeyAlias!!
+                keyPassword = releaseKeyPassword
+            }
+        }
+    }
+
     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")
+            // Use a real release keystore when provided; fall back to debug keys otherwise.
+            signingConfig = signingConfigs.getByName(if (hasReleaseKeystore) "release" else "debug")
         }
     }
 }