Gearslip: phone-side Android Auto client

gearslip/build.gradle.kts

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+import org.jetbrains.kotlin.gradle.dsl.JvmTarget
+import org.jetbrains.kotlin.gradle.tasks.KotlinJvmCompile
+
+/**
+ * Gearslip: a phone-side Android Auto client built against the reverse-engineered AA wire
+ * protocol, so a non-Google app can authenticate to and project onto a real car head unit
+ * with no gearhead in the path. No third-party dependencies: the X.509 certificate is
+ * generated by hand (see `SelfSignedCert`) so there is no BouncyCastle version to track and
+ * no second crypto provider to collide with Conscrypt.
+ */
+plugins {
+    alias(libs.plugins.android.application)
+    alias(libs.plugins.kotlin.compose)
+}
+
+android {
+    namespace = "app.seb3thehacker.gearslip"
+    compileSdk = 37
+
+    defaultConfig {
+        applicationId = "app.seb3thehacker.gearslip"
+        minSdk = 35
+        targetSdk = 37
+        versionCode = 1
+        versionName = "0.1"
+    }
+
+    // Keeps build output out of the module folder: <root>/build/gearslip/... instead of
+    // <root>/gearslip/build/..., so everything this project produces lands under one
+    // root-level build/ directory.
+    layout.buildDirectory.set(rootProject.layout.buildDirectory.dir("gearslip"))
+
+    compileOptions {
+        sourceCompatibility = JavaVersion.VERSION_21
+        targetCompatibility = JavaVersion.VERSION_21
+    }
+
+    testOptions {
+        // GearslipLog calls android.util.Log, which is a stub on the local JVM.
+        unitTests.isReturnDefaultValues = true
+    }
+
+}
+
+// Renames the produced APK and moves it to the root build/ folder (<root>/build/Gearslip-debug.apk)
+// after the fact rather than fighting AGP's variant-output API across versions - simpler and
+// doesn't break when that API moves again.
+tasks.register("renameApk") {
+    doLast {
+        val rootBuildDir = rootProject.layout.buildDirectory.get().asFile
+        layout.buildDirectory.dir("outputs/apk").get().asFile.walkTopDown()
+            .filter { it.extension == "apk" }
+            .toList()
+            .forEach { apk ->
+                val renamed = File(rootBuildDir, "Gearslip-${apk.parentFile.name}.apk")
+                apk.copyTo(renamed, overwrite = true)
+                apk.delete()
+            }
+    }
+}
+tasks.matching { it.name.startsWith("assemble") }.configureEach { finalizedBy("renameApk") }
+
+dependencies {
+    // Only for the XML window theme (Theme.Material3.DynamicColors); every screen is Compose.
+    implementation(libs.google.material)
+    implementation(platform(libs.androidx.compose.bom))
+    implementation(libs.androidx.compose.ui)
+    implementation(libs.androidx.compose.material3)
+    implementation(libs.androidx.compose.material.icons.core)
+    implementation(libs.androidx.activity.compose)
+    implementation(libs.androidx.lifecycle.runtime.compose)
+    // Used from the host side, not the app side: Gearslip renders other apps' templates rather
+    // than publishing its own, so this is here for the AIDL interfaces and the model classes
+    // their Bundleables deserialize into.
+    implementation(libs.androidx.car.app)
+    implementation(libs.androidx.car.app.projected)
+    testImplementation(libs.junit)
+}
+
+tasks.withType<KotlinJvmCompile>().configureEach {
+    compilerOptions {
+        jvmTarget.set(JvmTarget.JVM_21)
+    }
+}