Build: Use official gradle strings instead of hard-coding them.

buildSrc/src/main/kotlin/JniUtils.kt

@@ -1,4 +1,5 @@
 import dev.nokee.platform.jni.JniLibraryDependencies
+import org.gradle.nativeplatform.MachineArchitecture
 import dev.nokee.runtime.nativebase.OperatingSystemFamily
 import dev.nokee.runtime.nativebase.TargetMachine
 import org.gradle.api.Action
@@ -9,6 +10,8 @@ import org.gradle.api.artifacts.ModuleDependency
 import org.gradle.api.artifacts.ModuleDependencyCapabilitiesHandler
 import org.gradle.api.provider.Provider
 
+typealias OSFamily = org.gradle.nativeplatform.OperatingSystemFamily
+
 fun MinimalExternalModuleDependency.dependencyNotation() =
     "${module.group}:${module.name}:${versionConstraint.requiredVersion}"
 
@@ -32,31 +35,31 @@ fun ModuleDependencyCapabilitiesHandler.requireLibCapability(notation: Provider<
 }
 
 val TargetMachine.variantName: String
-    get() {
-        val osFamily = when {
-            operatingSystemFamily.isWindows -> "windows"
-            operatingSystemFamily.isLinux -> "linux"
-            operatingSystemFamily.isMacOS -> "macos"
-            else -> GradleException("Unknown operating system family '${operatingSystemFamily}'.")
-        }
-        return "$osFamily-$architectureString"
+    get() = "$osFamily-$architectureString"
+
+val TargetMachine.osFamily: String
+    get() = when {
+        operatingSystemFamily.isWindows -> OSFamily.WINDOWS
+        operatingSystemFamily.isLinux -> OSFamily.LINUX
+        operatingSystemFamily.isMacOS -> OSFamily.MACOS
+        else -> throw GradleException("Unknown operating system family '${operatingSystemFamily}'.")
     }
 
+val TargetMachine.architectureString: String
+    get() = if (architecture.is32Bit) MachineArchitecture.X86 else MachineArchitecture.X86_64
+
 val TargetMachine.targetsHost: Boolean
     get() {
         val osName = System.getProperty("os.name").toLowerCase().replace(" ", "")
         val osFamily = operatingSystemFamily
         return when {
-            osFamily.isWindows && osName.contains("windows") -> true
-            osFamily.isLinux && osName.contains("linux") -> true
-            osFamily.isMacOS && osName.contains("macos") -> true
+            osFamily.isWindows && osName.contains(OSFamily.WINDOWS) -> true
+            osFamily.isLinux && osName.contains(OSFamily.LINUX) -> true
+            osFamily.isMacOS && osName.contains(OSFamily.MACOS) -> true
             else -> false
         }
     }
 
-val TargetMachine.architectureString: String
-    get() = if (architecture.is32Bit) "x86" else "x86-64"
-
 fun libraryFileNameFor(project: Project, osFamily: OperatingSystemFamily): String = when {
     osFamily.isWindows -> "${project.name}.dll"
     osFamily.isLinux -> "lib${project.name}.so"