fn isSdkInstalled(allocator: Allocator) bool

Check if SDK is installed on Darwin without triggering CLT installation popup window. Note: simply invoking xcrun will inevitably trigger the CLT installation popup. Therefore, we resort to invoking xcode-select --print-path and checking if the status is nonzero. stderr from xcode-select is ignored. If error.OutOfMemory occurs in Allocator, this function returns null.

Parameters

allocator: Allocator,