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fn getSdk(allocator: Allocator, target: Target) ?Sdk

Detect SDK on Darwin. Calls xcrun --sdk <target_sdk> --show-sdk-path which fe…

Detect SDK on Darwin. Calls xcrun --sdk <target_sdk> --show-sdk-path which fetches the path to the SDK sysroot (if any). Subsequently calls xcrun --sdk <target_sdk> --show-sdk-version which fetches version of the SDK. The caller needs to deinit the resulting struct. stderr from xcrun is ignored. If error.OutOfMemory occurs in Allocator, this function returns null.

fn isSdkInstalled(allocator: Allocator) bool

Check if SDK is installed on Darwin without triggering CLT installation popup wi…

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.