add support building signed release artifact with keystore.properties

app/build.gradle.kts

@@ -1,9 +1,17 @@
+import java.util.Properties
+import java.io.FileInputStream
 plugins {
     alias(libs.plugins.android.application)
     alias(libs.plugins.kotlin.android)
     alias(libs.plugins.kotlin.compose)
 }
 
+val keystoreProperties = Properties()
+val keystoreFileExists = rootProject.file("keystore.properties").exists();
+if (keystoreFileExists) {
+    keystoreProperties.load(rootProject.file("keystore.properties").inputStream())
+}
+
 android {
     namespace = "dev.mi6e4ka.openstore"
     compileSdk = 36
@@ -21,10 +29,22 @@ android {
         //testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
     }
 
+    signingConfigs {
+        if (keystoreFileExists) {
+            create("release") {
+                storeFile = keystoreProperties["storeFile"]?.let { file(it as String) }
+                storePassword = keystoreProperties["storePassword"] as String
+                keyAlias = keystoreProperties["keyAlias"] as String
+                keyPassword = keystoreProperties["keyPassword"] as String
+            }
+        }
+    }
+
     buildTypes {
         release {
             isMinifyEnabled = true
             isShrinkResources = true
+            signingConfig = signingConfigs.findByName("release")?.takeIf { it.storeFile != null }
             proguardFiles(
                 getDefaultProguardFile("proguard-android-optimize.txt"),
                 "proguard-rules.pro"

keystore.properties.example

@@ -0,0 +1,4 @@
+storeFile=/full/path/to/your.jks
+keyAlias=YourKeyAlias
+storePassword=yourStorePasswd
+keyPassword=yourKeyPasswd