Integrate rust into gradle

zygiskd/build.gradle.kts

@@ -1,10 +1,35 @@
 plugins {
     id("com.android.library")
+    id("org.mozilla.rust-android-gradle.rust-android")
 }
 
-val verCode: Int by rootProject.extra
-val verName: String by rootProject.extra
-
-android {
-    namespace = "icu.nullptr.zygisksu"
+cargo {
+    module = "."
+    libname = "zygiskd"
+    targetIncludes = arrayOf("zygiskd")
+    targets = listOf("arm64", "arm", "x86", "x86_64")
+    val isDebug = gradle.startParameter.taskNames.any { it.toLowerCase().contains("debug") }
+    profile = if (isDebug) "debug" else "release"
+    targetDirectory = "build/intermediates/rust"
+    exec = { spec, _ ->
+        spec.environment("CARGO_TARGET_DIR", targetDirectory)
+    }
+}
+
+androidComponents.onVariants { variant ->
+    val variantCapped = variant.name.capitalize()
+    task("build$variantCapped") {
+        group = "zygiskd"
+        cargo.targets?.forEach {
+            dependsOn("cargoBuild${it.capitalize()}")
+        }
+    }
+
+    task<Exec>("pushAndRun$variantCapped") {
+        group = "zygiskd"
+        dependsOn("build$variantCapped")
+        doLast {
+            commandLine("adb", "push", "target/")
+        }
+    }
 }