Android Signing on Travis

android/app/build.gradle

@@ -43,12 +43,25 @@ android {
             path rootCMakeLists
         }
     }
+    signingConfigs {
+        release
+    }
     buildTypes {
         release {
             minifyEnabled true
             proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
         }
     }
+
+    def keystoreFile = file("../../keystore.jks")
+    if (System.getenv("TRAVIS") == "true" && keystoreFile.exists()) {
+        println("Enabling Signing on Travis")
+        buildTypes.release.signingConfig = signingConfigs.release
+        signingConfigs.release.storeFile = keystoreFile
+        signingConfigs.release.storePassword = System.getenv("android_keystore_pw")
+        signingConfigs.release.keyAlias = System.getenv("android_keystore_alias")
+        signingConfigs.release.keyPassword = System.getenv("android_keystore_alias_pw")
+    }
 }
 
 tasks.withType(org.jetbrains.kotlin.gradle.tasks.KotlinCompile).all {

android/app/proguard-rules.pro

@@ -20,4 +20,5 @@
 # hide the original source file name.
 #-renamesourcefileattribute SourceFile
 
--dontobfuscate
+-dontobfuscate
+-keep class com.metallic.chiaki.** { *; }