ci: add signing the APK to the building workflow (#44)

* ci: add signing the APK to the workflow

* ci: add decoding keystore secrets on CI

Author: Wylwi

.github/workflows/artifact_building.yml

@@ -15,8 +15,12 @@ jobs:
       - name: Decode secrets
         env:
           GOOGLE_SERVICES: ${{ secrets.GOOGLE_SERVICES }}
+          KEYSTORE_PROPERTIES: ${{ secrets.KEYSTORE_PROPERTIES }}
+          KEYSTORE: ${{ secrets.KEYSTORE }}
         run: |
           echo "$GOOGLE_SERVICES" | base64 --decode > ./app/google-services.json
+          echo "$KEYSTORE_PROPERTIES" | base64 --decode > ./keystore.properties
+          echo "$KEYSTORE" | base64 --decode > ./keystore.jks
 
       - name: Setup JDK
         uses: actions/setup-java@v4
@@ -45,5 +49,5 @@ jobs:
         uses: actions/upload-artifact@v4
         with:
           name: app-release.apk
-          path: app/build/outputs/apk/release/app-release-unsigned.apk
+          path: app/build/outputs/apk/release/app-release.apk
 

.github/workflows/ci.yml

@@ -31,8 +31,12 @@ jobs:
       - name: Decode secrets
         env:
           GOOGLE_SERVICES: ${{ secrets.GOOGLE_SERVICES }}
+          KEYSTORE_PROPERTIES: ${{ secrets.KEYSTORE_PROPERTIES }}
+          KEYSTORE: ${{ secrets.KEYSTORE }}
         run: |
           echo "$GOOGLE_SERVICES" | base64 --decode > ./app/google-services.json
+          echo "$KEYSTORE_PROPERTIES" | base64 --decode > ./keystore.properties
+          echo "$KEYSTORE" | base64 --decode > ./keystore.jks
 
       # Kernel-based Virtual Machine (KVM) is an open source virtualization technology built into Linux. Enabling it allows the Android emulator to run faster.
       - name: Enable KVM group perms

app/build.gradle.kts

@@ -1,3 +1,7 @@
+import org.apache.commons.compress.harmony.pack200.PackingUtils.config
+import java.io.FileInputStream
+import java.util.Properties
+
 plugins {
     alias(libs.plugins.androidApplication)
     alias(libs.plugins.jetbrainsKotlinAndroid)
@@ -7,6 +11,16 @@ plugins {
     id("com.google.gms.google-services")
 }
 
+// Create a variable called keystorePropertiesFile, and initialize it to your
+// keystore.properties file, in the rootProject folder.
+val keystorePropertiesFile = rootProject.file("keystore.properties")
+
+// Initialize a new Properties() object called keystoreProperties.
+val keystoreProperties = Properties()
+
+// Load your keystore.properties file into the keystoreProperties object.
+keystoreProperties.load(FileInputStream(keystorePropertiesFile))
+
 android {
     namespace = "ch.hikemate.app"
     compileSdk = 34
@@ -24,13 +38,23 @@ android {
         }
     }
 
+    signingConfigs {
+        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 {
             isMinifyEnabled = false
             proguardFiles(
                 getDefaultProguardFile("proguard-android-optimize.txt"),
                 "proguard-rules.pro"
             )
+            signingConfig = signingConfigs.getByName("release")
         }
 
         debug {