feat: add rustyline

__term/rustyline/Cargo.lock

@@ -0,0 +1,196 @@
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+# It is not intended for manual editing.
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__term/rustyline/Cargo.toml

@@ -0,0 +1,11 @@
+[package]
+name = "rustyline"
+version = "0.1.0"
+authors = ["Hatter Jiang <jht5945@gmail.com>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+rustyline = "7.1.0"
+

__term/rustyline/src/main.rs

@@ -0,0 +1,32 @@
+use rustyline::error::ReadlineError;
+use rustyline::Editor;
+
+fn main() {
+    // `()` can be used when no completer is required
+    let mut rl = Editor::<()>::new();
+    if rl.load_history("history.txt").is_err() {
+        println!("No previous history.");
+    }
+    loop {
+        let readline = rl.readline("prompt$ ");
+        match readline {
+            Ok(line) => {
+                rl.add_history_entry(line.as_str());
+                println!("Input line: {}", line);
+            },
+            Err(ReadlineError::Interrupted) => {
+                println!("CTRL-C");
+                break
+            },
+            Err(ReadlineError::Eof) => {
+                println!("CTRL-D");
+                break
+            },
+            Err(err) => {
+                println!("Error: {:?}", err);
+                break
+            }
+        }
+    }
+    rl.save_history("history.txt").unwrap();
+}