fix deprecation warning by using newer API

app/build.gradle.kts

@@ -1,3 +1,6 @@
+import javax.inject.Inject
+import org.gradle.process.ExecOperations
+
 plugins {
     alias(libs.plugins.android.application)
     alias(libs.plugins.kotlin.android)
@@ -5,25 +8,22 @@ plugins {
 }
 
 // Build isodrive native binary from submodule (only if binaries are missing)
-val buildIsodrive by tasks.registering {
+abstract class BuildIsodriveTask @Inject constructor(
-    group = "native"
+    private val execOps: ExecOperations
-    description = "Build isodrive binary for all Android architectures"
+) : DefaultTask() {
 
-    val isodriveDir = rootProject.file("isodrive")
+    @get:InputDirectory
-    val outputDir = file("src/main/assets/bin")
+    abstract val isodriveDir: DirectoryProperty
-    val architectures = listOf("arm64-v8a", "armeabi-v7a", "x86_64", "x86")
 
-    // Check if all binaries exist
+    @get:OutputDirectory
-    val allBinariesExist = architectures.all { arch ->
+    abstract val outputDir: DirectoryProperty
-        outputDir.resolve("$arch/isodrive").exists()
-    }
 
-    // Skip if all binaries already exist
+    @TaskAction
-    onlyIf { !allBinariesExist }
+    fun build() {
+        val isodrivePath = isodriveDir.get().asFile
+        val outputPath = outputDir.get().asFile
 
-    doLast {
+        if (!isodrivePath.resolve("src").exists()) {
-        // Verify submodule is initialized
-        if (!isodriveDir.resolve("src").exists()) {
             throw GradleException("isodrive submodule not initialized. Run: git submodule update --init")
         }
 
@@ -33,8 +33,8 @@ val buildIsodrive by tasks.registering {
             "src/androidusbisomanager.cpp",
             "src/main.cpp"
         )
-        val srcs = sourceFiles.joinToString(" ") { "$isodriveDir/$it" }
+        val srcs = sourceFiles.joinToString(" ") { "$isodrivePath/$it" }
-        val cflags = "-I$isodriveDir/src/include -static-libstdc++ -Os -s"
+        val cflags = "-I$isodrivePath/src/include -static-libstdc++ -Os -s"
 
         val compilers = mapOf(
             "arm64-v8a" to "aarch64-linux-android26-clang++",
@@ -43,16 +43,14 @@ val buildIsodrive by tasks.registering {
             "x86" to "i686-linux-android26-clang++"
         )
 
-        // Check if we're on NixOS (nix-shell available)
         val useNixShell = File("/etc/NIXOS").exists() ||
             Runtime.getRuntime().exec(arrayOf("which", "nix-shell")).waitFor() == 0
 
         if (useNixShell) {
             println("NixOS detected, using nix-shell for NDK...")
 
-            // Build all architectures in one nix-shell invocation
             val buildScript = compilers.entries.joinToString("\n") { (arch, compiler) ->
-                val archDir = outputDir.resolve(arch)
+                val archDir = outputPath.resolve(arch)
                 val output = archDir.resolve("isodrive")
                 if (output.exists()) {
                     "echo 'isodrive for $arch already exists, skipping'"
@@ -65,9 +63,7 @@ val buildIsodrive by tasks.registering {
                 }
             }
 
-            exec {
+            execOps.exec {
-                environment("SRCS", srcs)
-                environment("CFLAGS", cflags)
                 environment("NIXPKGS_ALLOW_UNFREE", "1")
                 commandLine("nix-shell", "-p", "androidenv.androidPkgs.ndk-bundle", "--run", """
                     SDK_ROOT=${'$'}(find /nix/store -maxdepth 1 -name "*android-sdk-ndk*" -type d 2>/dev/null | head -1)
@@ -79,7 +75,6 @@ val buildIsodrive by tasks.registering {
                 """.trimIndent())
             }
         } else {
-            // Standard NDK lookup for non-NixOS
             val ndkDir = listOfNotNull(
                 System.getenv("ANDROID_NDK_HOME"),
                 System.getenv("ANDROID_NDK")
@@ -92,7 +87,7 @@ val buildIsodrive by tasks.registering {
             }
 
             compilers.forEach { (arch, compiler) ->
-                val archDir = outputDir.resolve(arch)
+                val archDir = outputPath.resolve(arch)
                 val output = archDir.resolve("isodrive")
 
                 if (output.exists()) {
@@ -102,7 +97,7 @@ val buildIsodrive by tasks.registering {
 
                 archDir.mkdirs()
                 println("Building isodrive for $arch...")
-                exec {
+                execOps.exec {
                     commandLine("sh", "-c", "$toolchain/$compiler $cflags $srcs -o $output")
                 }
             }
@@ -111,7 +106,18 @@ val buildIsodrive by tasks.registering {
     }
 }
 
-// Hook into the build process - build isodrive before merging assets
+val buildIsodrive by tasks.registering(BuildIsodriveTask::class) {
+    group = "native"
+    description = "Build isodrive binary for all Android architectures"
+
+    isodriveDir.set(rootProject.file("isodrive"))
+    outputDir.set(file("src/main/assets/bin"))
+
+    val architectures = listOf("arm64-v8a", "armeabi-v7a", "x86_64", "x86")
+    val outDir = file("src/main/assets/bin")
+    onlyIf { !architectures.all { arch -> outDir.resolve("$arch/isodrive").exists() } }
+}
+
 tasks.matching { it.name.startsWith("merge") && it.name.endsWith("Assets") }.configureEach {
     dependsOn(buildIsodrive)
 }