@@ -32,8 +32,14 @@ impl Args {
3232 "--version" => args.display_version = true,
3333 "--help" => args.display_help = true,
3434 "--tutor" => args.load_tutor = true,
35− "--vsplit" => args.split = Some(Layout::Vertical),
36− "--hsplit" => args.split = Some(Layout::Horizontal),
35+ "--vsplit" => match args.split {
36+ Some(_) => anyhow::bail!("can only set a split once of a specific type"),
37+ None => args.split = Some(Layout::Vertical),
38+ },
39+ "--hsplit" => match args.split {
40+ Some(_) => anyhow::bail!("can only set a split once of a specific type"),
41+ None => args.split = Some(Layout::Horizontal),
42+ },
3743 "--health" => {
3844 args.health = true;
3945 args.health_arg = argv.next_if(|opt| !opt.starts_with('-'));