ci(android): sign release builds with dedicated keystore

android/.gitignore

@@ -10,5 +10,7 @@ GeneratedPluginRegistrant.java
 # Remember to never publicly share your keystore.
 # See https://flutter.dev/to/reference-keystore
 key.properties
+app/key.properties
+app/komet-release.jks
 **/*.keystore
 **/*.jks

android/app/build.gradle.kts

@@ -1,3 +1,6 @@
+import java.util.Properties
+import java.io.FileInputStream
+
 plugins {
     id("com.android.application")
     id("kotlin-android")
@@ -6,6 +9,13 @@ plugins {
     id("com.google.gms.google-services")
 }
 
+val keystoreProperties = Properties()
+val keystorePropertiesFile = rootProject.file("key.properties")
+val hasReleaseSigning = keystorePropertiesFile.exists()
+if (hasReleaseSigning) {
+    keystoreProperties.load(FileInputStream(keystorePropertiesFile))
+}
+
 android {
     namespace = "ru.komet.app"
     compileSdk = flutter.compileSdkVersion
@@ -43,11 +53,24 @@ android {
         }
     }
 
+    signingConfigs {
+        if (hasReleaseSigning) {
+            create("release") {
+                keyAlias = keystoreProperties["keyAlias"] as String
+                keyPassword = keystoreProperties["keyPassword"] as String
+                storeFile = file(keystoreProperties["storeFile"] as String)
+                storePassword = keystoreProperties["storePassword"] as String
+            }
+        }
+    }
+
     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")
+            signingConfig = if (hasReleaseSigning) {
+                signingConfigs.getByName("release")
+            } else {
+                signingConfigs.getByName("debug")
+            }
         }
     }
 }