feat: support stdin and pipe for Child API (#1033)

yazi-core/src/input/commands/kill.rs

@@ -70,6 +70,7 @@ impl Input {
 		let snap = self.snap_mut();
 
 		match opt.kind.as_str() {
+			"all" => self.kill_range(..),
 			"bol" => {
 				let end = snap.idx(snap.cursor).unwrap_or(snap.len());
 				self.kill_range(..end)

yazi-core/src/input/input.rs

@@ -87,16 +87,17 @@ impl Input {
 	}
 
 	pub(super) fn flush_value(&mut self) {
+		let Some(tx) = &self.callback else { return };
 		self.ticket = self.ticket.wrapping_add(1);
 
 		if self.realtime {
 			let value = self.snap().value.clone();
-			self.callback.as_ref().unwrap().send(Err(InputError::Typed(value))).ok();
+			tx.send(Err(InputError::Typed(value))).ok();
 		}
 
 		if self.completion {
 			let before = self.partition()[0].to_owned();
-			self.callback.as_ref().unwrap().send(Err(InputError::Completed(before, self.ticket))).ok();
+			tx.send(Err(InputError::Completed(before, self.ticket))).ok();
 		}
 	}
 }

yazi-plugin/src/process/child.rs

@@ -1,25 +1,25 @@
 use std::time::Duration;
 
 use futures::future::try_join3;
-use mlua::{AnyUserData, IntoLuaMulti, Table, UserData, Value};
-use tokio::{io::{self, AsyncBufReadExt, AsyncReadExt, BufReader}, process::{ChildStderr, ChildStdin, ChildStdout}, select};
+use mlua::{AnyUserData, ExternalError, IntoLua, IntoLuaMulti, Table, UserData, Value};
+use tokio::{io::{self, AsyncBufReadExt, AsyncReadExt, AsyncWriteExt, BufReader, BufWriter}, process::{ChildStderr, ChildStdin, ChildStdout}, select};
 
 use super::Status;
 use crate::process::Output;
 
 pub struct Child {
 	inner:  tokio::process::Child,
-	_stdin: Option<ChildStdin>,
+	stdin:  Option<BufWriter<ChildStdin>>,
 	stdout: Option<BufReader<ChildStdout>>,
 	stderr: Option<BufReader<ChildStderr>>,
 }
 
 impl Child {
 	pub fn new(mut inner: tokio::process::Child) -> Self {
-		let stdin = inner.stdin.take();
+		let stdin = inner.stdin.take().map(BufWriter::new);
 		let stdout = inner.stdout.take().map(BufReader::new);
 		let stderr = inner.stderr.take().map(BufReader::new);
-		Self { inner, _stdin: stdin, stdout, stderr }
+		Self { inner, stdin, stdout, stderr }
 	}
 }
 
@@ -69,6 +69,26 @@ impl UserData for Child {
 				Err(_) => Ok((String::new(), 3u8)),
 			}
 		});
+
+		methods.add_async_method_mut("write_all", |lua, me, src: mlua::String| async move {
+			let Some(stdin) = &mut me.stdin else {
+				return Err("stdin is not piped".into_lua_err());
+			};
+			match stdin.write_all(src.as_bytes()).await {
+				Ok(()) => (true, Value::Nil).into_lua_multi(lua),
+				Err(e) => (false, e.raw_os_error()).into_lua_multi(lua),
+			}
+		});
+		methods.add_async_method_mut("flush", |lua, me, ()| async move {
+			let Some(stdin) = &mut me.stdin else {
+				return Err("stdin is not piped".into_lua_err());
+			};
+			match stdin.flush().await {
+				Ok(()) => (true, Value::Nil).into_lua_multi(lua),
+				Err(e) => (false, e.raw_os_error()).into_lua_multi(lua),
+			}
+		});
+
 		methods.add_async_method_mut("wait", |lua, me, ()| async move {
 			match me.inner.wait().await {
 				Ok(status) => (Status::new(status), Value::Nil).into_lua_multi(lua),
@@ -107,5 +127,18 @@ impl UserData for Child {
 			Ok(_) => (true, Value::Nil).into_lua_multi(lua),
 			Err(e) => (false, e.raw_os_error()).into_lua_multi(lua),
 		});
+
+		methods.add_method_mut("take_stdin", |lua, me, ()| match me.stdin.take() {
+			Some(stdin) => lua.create_any_userdata(stdin.into_inner())?.into_lua(lua),
+			None => Ok(Value::Nil),
+		});
+		methods.add_method_mut("take_stdout", |lua, me, ()| match me.stdout.take() {
+			Some(stdout) => lua.create_any_userdata(stdout.into_inner())?.into_lua(lua),
+			None => Ok(Value::Nil),
+		});
+		methods.add_method_mut("take_stderr", |lua, me, ()| match me.stderr.take() {
+			Some(stderr) => lua.create_any_userdata(stderr.into_inner())?.into_lua(lua),
+			None => Ok(Value::Nil),
+		});
 	}
 }

yazi-plugin/src/process/command.rs

@@ -1,6 +1,7 @@
 use std::process::Stdio;
 
-use mlua::{AnyUserData, IntoLuaMulti, Lua, Table, UserData, Value};
+use mlua::{AnyUserData, ExternalError, IntoLuaMulti, Lua, Table, UserData, Value};
+use tokio::process::{ChildStderr, ChildStdin, ChildStdout};
 
 use super::{output::Output, Child};
 
@@ -36,6 +37,33 @@ impl Command {
 
 impl UserData for Command {
 	fn add_methods<'lua, M: mlua::UserDataMethods<'lua, Self>>(methods: &mut M) {
+		#[inline]
+		fn make_stdio(v: Value) -> mlua::Result<Stdio> {
+			match v {
+				Value::Integer(n) => {
+					return Ok(match n as u8 {
+						PIPED => Stdio::piped(),
+						INHERIT => Stdio::inherit(),
+						_ => Stdio::null(),
+					});
+				}
+				Value::UserData(ud) => {
+					if let Ok(stdin) = ud.take::<ChildStdin>() {
+						return Ok(stdin.try_into()?);
+					} else if let Ok(stdout) = ud.take::<ChildStdout>() {
+						return Ok(stdout.try_into()?);
+					} else if let Ok(stderr) = ud.take::<ChildStderr>() {
+						return Ok(stderr.try_into()?);
+					}
+				}
+				_ => {}
+			}
+
+			Err(
+				"must be one of Command.NULL, Command.PIPED, Command.INHERIT, or a ChildStdin, ChildStdout, or ChildStderr".into_lua_err(),
+			)
+		}
+
 		methods.add_function("arg", |_, (ud, arg): (AnyUserData, mlua::String)| {
 			ud.borrow_mut::<Self>()?.inner.arg(arg.to_string_lossy().as_ref());
 			Ok(ud)
@@ -62,28 +90,16 @@ impl UserData for Command {
 				Ok(ud)
 			},
 		);
-		methods.add_function("stdin", |_, (ud, stdio): (AnyUserData, u8)| {
-			ud.borrow_mut::<Self>()?.inner.stdin(match stdio {
-				PIPED => Stdio::piped(),
-				INHERIT => Stdio::inherit(),
-				_ => Stdio::null(),
-			});
+		methods.add_function("stdin", |_, (ud, stdio): (AnyUserData, Value)| {
+			ud.borrow_mut::<Self>()?.inner.stdin(make_stdio(stdio)?);
 			Ok(ud)
 		});
-		methods.add_function("stdout", |_, (ud, stdio): (AnyUserData, u8)| {
-			ud.borrow_mut::<Self>()?.inner.stdout(match stdio {
-				PIPED => Stdio::piped(),
-				INHERIT => Stdio::inherit(),
-				_ => Stdio::null(),
-			});
+		methods.add_function("stdout", |_, (ud, stdio): (AnyUserData, Value)| {
+			ud.borrow_mut::<Self>()?.inner.stdout(make_stdio(stdio)?);
 			Ok(ud)
 		});
-		methods.add_function("stderr", |_, (ud, stdio): (AnyUserData, u8)| {
-			ud.borrow_mut::<Self>()?.inner.stderr(match stdio {
-				PIPED => Stdio::piped(),
-				INHERIT => Stdio::inherit(),
-				_ => Stdio::null(),
-			});
+		methods.add_function("stderr", |_, (ud, stdio): (AnyUserData, Value)| {
+			ud.borrow_mut::<Self>()?.inner.stderr(make_stdio(stdio)?);
 			Ok(ud)
 		});
 		methods.add_method_mut("spawn", |lua, me, ()| match me.inner.spawn() {