keystore added

app/build.gradle.kts

@@ -1,9 +1,51 @@
+import java.util.Properties
+
 plugins {
     id("com.android.application")
     id("com.google.devtools.ksp")
     id("org.jetbrains.kotlin.plugin.compose")
 }
 
+val keystorePropertiesFile = rootProject.file("keystore.properties")
+val keystoreProperties = Properties().apply {
+    if (keystorePropertiesFile.exists()) {
+        keystorePropertiesFile.inputStream().use(::load)
+    }
+}
+
+fun signingValue(propertyName: String, envName: String): String? {
+    return (keystoreProperties[propertyName] as? String)
+        ?.takeIf { it.isNotBlank() }
+        ?: System.getenv(envName)?.takeIf { it.isNotBlank() }
+}
+
+val releaseStoreFile = signingValue("storeFile", "RELEASE_STORE_FILE")
+val releaseStorePassword = signingValue("storePassword", "RELEASE_STORE_PASSWORD")
+val releaseKeyAlias = signingValue("keyAlias", "RELEASE_KEY_ALIAS")
+val releaseKeyPassword = signingValue("keyPassword", "RELEASE_KEY_PASSWORD")
+val hasReleaseSigning = listOf(
+    releaseStoreFile,
+    releaseStorePassword,
+    releaseKeyAlias,
+    releaseKeyPassword
+).all { !it.isNullOrBlank() }
+
+gradle.taskGraph.whenReady {
+    val releaseBundleRequested = allTasks.any {
+        it.path == ":app:bundleRelease" || it.name == "bundleRelease"
+    }
+    val releaseApkRequested = allTasks.any {
+        it.path == ":app:assembleRelease" || it.name == "assembleRelease"
+    }
+    if ((releaseBundleRequested || releaseApkRequested) && !hasReleaseSigning) {
+        throw GradleException(
+            "Release signing is not configured. Fill storePassword, keyAlias, and keyPassword " +
+                "in keystore.properties, or set RELEASE_STORE_FILE, RELEASE_STORE_PASSWORD, " +
+                "RELEASE_KEY_ALIAS, and RELEASE_KEY_PASSWORD."
+        )
+    }
+}
+
 android {
     namespace = "de.softwareapp_hb.privateqrscanner"
     compileSdk = 36
@@ -22,9 +64,26 @@ android {
         }
     }
 
+    signingConfigs {
+        if (hasReleaseSigning) {
+            create("release") {
+                storeFile = file(releaseStoreFile!!)
+                storePassword = releaseStorePassword
+                keyAlias = releaseKeyAlias
+                keyPassword = releaseKeyPassword
+            }
+        }
+    }
+
     buildTypes {
         release {
             isMinifyEnabled = true
+            if (hasReleaseSigning) {
+                signingConfig = signingConfigs.getByName("release")
+            }
+            ndk {
+                debugSymbolLevel = "SYMBOL_TABLE"
+            }
             proguardFiles(
                 getDefaultProguardFile("proguard-android-optimize.txt"),
                 "proguard-rules.pro"