Implement CLS.

1 files changed, 10 insertions, 0 deletions

diff --git a/src/main.rs b/src/main.rs
index 0662c98..f4f5b72 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,3 +1,4 @@
+use crossterm::{cursor, execute, terminal};
 use eyre::{bail, Result};
 use regex::Regex;
 use rustyline::DefaultEditor;
@@ -142,6 +143,13 @@ impl Command {
                 exit_status.send(0)?;
             }
 
+            Builtin(Cls) => {
+                let mut stdout_handle = io::stdout();
+                execute!(stdout_handle, terminal::Clear(terminal::ClearType::All))?;
+                execute!(stdout_handle, cursor::MoveTo(0, 0))?;
+                exit_status.send(0)?;
+            }
+
             _ => bail!("Command::run not implemented for {:?}", self),
         }
 
@@ -226,6 +234,8 @@ impl Command {
                     _ => EchoText { message: args.to_string() },
                 })),
 
+            "CLS" => Ok(Builtin(Cls)),
+
             _ =>
                 Err(eyre::eyre!("parse not implemented for {:?}", input))
         }