feat: add filename completion

Cargo.lock

@@ -375,6 +375,7 @@ dependencies = [
  "once_cell",
  "regex",
  "rustyline",
+ "rustyline-derive",
  "shlex",
  "sysinfo",
  "uname",
@@ -505,6 +506,17 @@ dependencies = [
  "winapi",
 ]
 
+[[package]]
+name = "rustyline-derive"
+version = "0.7.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "107c3d5d7f370ac09efa62a78375f94d94b8a33c61d8c278b96683fb4dbf2d8d"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
 [[package]]
 name = "scopeguard"
 version = "1.1.0"

Cargo.toml

@@ -11,6 +11,7 @@ dirs = "4.0"
 once_cell = "1.17"
 regex = "1.7"
 rustyline = "10.1"
+rustyline-derive = "0.7"
 shlex = "1.1"
 sysinfo = "0.27"
 uname = "0.1"

src/main.rs

@@ -2,9 +2,11 @@ use crate::builtins::BuiltinConfig;
 use crate::prompt::Prompt;
 use colored::Colorize;
 use execute::interpret;
+use rustyline::completion::FilenameCompleter;
 use rustyline::config::Configurer;
 use rustyline::error::ReadlineError;
-use rustyline::{Editor, Result};
+use rustyline::{CompletionType, Config, Editor, Result};
+use rustyline_derive::{Completer, Helper, Highlighter, Hinter, Validator};
 use whoami::username;
 
 mod builtins;
@@ -14,13 +16,28 @@ mod parse;
 mod preprocess;
 mod prompt;
 
+#[derive(Completer, Helper, Highlighter, Hinter, Validator)]
+struct EditorHelper {
+    #[rustyline(Completer)]
+    completer: FilenameCompleter,
+}
+
 fn main() -> Result<()> {
     let (ctrlc_send, ctrlc_recv) = crossbeam_channel::unbounded::<()>();
     let _ = ctrlc::set_handler(move || {
         let _ = ctrlc_send.send(());
     });
 
-    let mut rl = Editor::<()>::new()?;
+    let config = Config::builder()
+        .completion_type(CompletionType::List)
+        .build();
+
+    let helper = EditorHelper {
+        completer: FilenameCompleter::new(),
+    };
+
+    let mut rl = Editor::with_config(config)?;
+    rl.set_helper(Some(helper));
     rl.set_auto_add_history(true);
 
     let mut prompt = Prompt::new();