Example of declaring Android signing configs using Gradle Kotlin DSL with gitignore keystore.properties

README.md

Using keystore.properties files (create it in project root, gitignored)

Contents of keystore.properties

storePassword=mypass
keyPassword=mypass
keyAlias=key0

In app module build.gradle.kts

...

    defaultConfig {
        applicationId = "com.myapp"
        minSdk = 24
        targetSdk = 34
        versionCode = 2
        versionName = "1.1"

        testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
        vectorDrawables {
            useSupportLibrary = true
        }
    }

    val keystorePropertiesFile = rootProject.file("keystore.properties")
    val keystoreProperties = Properties().apply {
        load(FileInputStream(keystorePropertiesFile))
    }
    signingConfigs {
        create("release") {
            storeFile = file("$rootDir/keystore.jks")
            storePassword = keystoreProperties["storePassword"] as String
            keyAlias = keystoreProperties["keyAlias"] as String
            keyPassword = keystoreProperties["keyPassword"] as String
        }

    }

    buildTypes {
        release {
            isMinifyEnabled = true
            isShrinkResources = true
            isDebuggable = true
            signingConfig = signingConfigs["release"]
            proguardFiles(
                getDefaultProguardFile("proguard-android-optimize.txt"),
                "proguard-rules.pro"
            )
        }
    }
    compileOptions {
        sourceCompatibility = JavaVersion.VERSION_1_8
        targetCompatibility = JavaVersion.VERSION_1_8
    }
    
    ...