refactor: Migrate to build.gradle.kts

...and rework the original "helper.gradle" into proper plugins. This
also allows the signing configuration code to be shared, and now
keystore.properties is no longer mandatory.

Author: PeterCxy

.gitignore

@@ -15,3 +15,4 @@
 .cxx
 local.properties
 /libs/**/build
+/buildSrc/build

.idea/compiler.xml

@@ -0,0 +1,47 @@
+plugins {
+    id("com.android.library")
+    id("org.jetbrains.kotlin.android")
+}
+
+android {
+    namespace = "im.angry.openeuicc.common"
+    compileSdk = 34
+
+    defaultConfig {
+        minSdk = 30
+
+        testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
+    }
+
+    buildTypes {
+        release {
+            isMinifyEnabled = false
+            proguardFiles(getDefaultProguardFile("proguard-android-optimize.txt"), "proguard-rules.pro")
+        }
+    }
+    compileOptions {
+        sourceCompatibility = JavaVersion.VERSION_1_8
+        targetCompatibility = JavaVersion.VERSION_1_8
+    }
+    kotlinOptions {
+        jvmTarget = "1.8"
+    }
+}
+
+dependencies {
+    implementation(project(":libs:lpac-jni"))
+    implementation("androidx.core:core-ktx:1.12.0")
+    implementation("androidx.appcompat:appcompat:1.6.1")
+    implementation("com.google.android.material:material:1.10.0")
+    implementation("androidx.constraintlayout:constraintlayout:2.1.4")
+    //noinspection KtxExtensionAvailable
+    implementation("androidx.preference:preference:1.2.1")
+    implementation("androidx.lifecycle:lifecycle-runtime-ktx:2.6.2")
+    implementation("androidx.swiperefreshlayout:swiperefreshlayout:1.1.0")
+    implementation("androidx.cardview:cardview:1.0.0")
+    implementation("androidx.datastore:datastore-preferences:1.0.0")
+    implementation("com.journeyapps:zxing-android-embedded:4.3.0")
+    testImplementation("junit:junit:4.13.2")
+    androidTestImplementation("androidx.test.ext:junit:1.1.5")
+    androidTestImplementation("androidx.test.espresso:espresso-core:3.5.1")
+}

.idea/gradle.xml

@@ -0,0 +1,48 @@
+import im.angry.openeuicc.build.*
+
+plugins {
+    id("com.android.application")
+    id("org.jetbrains.kotlin.android")
+}
+
+signingKeystoreProperties {
+    keyAliasField = "unprivKeyAlias"
+    keyPasswordField = "unprivKeyPassword"
+}
+
+apply {
+    plugin<MyVersioningPlugin>()
+    plugin<MySigningPlugin>()
+}
+
+android {
+    namespace = "im.angry.easyeuicc"
+    compileSdk = 34
+
+    defaultConfig {
+        applicationId = "im.angry.easyeuicc"
+        minSdk = 30
+        targetSdk = 34
+    }
+
+    buildTypes {
+        release {
+            isMinifyEnabled = false
+            proguardFiles(getDefaultProguardFile("proguard-android-optimize.txt"), "proguard-rules.pro")
+        }
+    }
+    compileOptions {
+        sourceCompatibility = JavaVersion.VERSION_1_8
+        targetCompatibility = JavaVersion.VERSION_1_8
+    }
+    kotlinOptions {
+        jvmTarget = "1.8"
+    }
+}
+
+dependencies {
+    implementation(project(":app-common"))
+    implementation("androidx.core:core-ktx:1.9.0")
+    implementation("androidx.appcompat:appcompat:1.6.1")
+    implementation("com.google.android.material:material:1.11.0")
+}

app-common/build.gradle

@@ -0,0 +1,51 @@
+import im.angry.openeuicc.build.*
+
+plugins {
+    id("com.android.application")
+    id("org.jetbrains.kotlin.android")
+}
+
+apply {
+    plugin<MyVersioningPlugin>()
+    plugin<MySigningPlugin>()
+}
+
+android {
+    namespace = "im.angry.openeuicc"
+    compileSdk = 34
+
+    defaultConfig {
+        applicationId = "im.angry.openeuicc"
+        minSdk = 30
+        targetSdk = 34
+
+        testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
+    }
+
+    buildTypes {
+        release {
+            isMinifyEnabled = false
+            proguardFiles(getDefaultProguardFile("proguard-android-optimize.txt"), "proguard-rules.pro")
+        }
+    }
+    compileOptions {
+        sourceCompatibility = JavaVersion.VERSION_1_8
+        targetCompatibility = JavaVersion.VERSION_1_8
+    }
+    kotlinOptions {
+        jvmTarget = "1.8"
+    }
+}
+
+dependencies {
+    implementation("androidx.constraintlayout:constraintlayout:2.1.4")
+    implementation("androidx.recyclerview:recyclerview:1.3.2")
+    compileOnly(project(":libs:hidden-apis-stub"))
+    implementation(project(":libs:hidden-apis-shim"))
+    implementation(project(":libs:lpac-jni"))
+    implementation(project(":app-common"))
+    implementation("androidx.appcompat:appcompat:1.6.1")
+    testImplementation("junit:junit:4.13.2")
+    androidTestImplementation("androidx.test.ext:junit:1.1.3")
+    androidTestImplementation("androidx.test.espresso:espresso-core:3.4.0")
+}

app-common/build.gradle.kts

@@ -0,0 +1,12 @@
+// Top-level build file where you can add configuration options common to all sub-projects/modules.
+plugins {
+    // The following Android-related plugins are already depended upon by buildSrc, hence unnecessary.
+    // id("com.android.application") version "8.1.2" apply false
+    // id("com.android.library") version "8.1.2" apply false
+    id("org.jetbrains.kotlin.android") version "1.9.20" apply false
+    id("org.jetbrains.kotlin.multiplatform") version "1.9.20" apply false
+}
+
+tasks.create<Delete>("clean") {
+    delete = setOf(rootProject.buildDir)
+}