From 4a077c7c65eced447c45389acf05007dd571bf26 Mon Sep 17 00:00:00 2001
From: Ilion Beyst <ilion.beyst@gmail.com>
Date: Sat, 1 Jan 2022 12:10:02 +0100
Subject: extract matchrunner crate from planetwars-cli

---
 planetwars-cli/src/match_runner/bot_runner.rs | 121 --------------------------
 1 file changed, 121 deletions(-)
 delete mode 100644 planetwars-cli/src/match_runner/bot_runner.rs

(limited to 'planetwars-cli/src/match_runner/bot_runner.rs')

diff --git a/planetwars-cli/src/match_runner/bot_runner.rs b/planetwars-cli/src/match_runner/bot_runner.rs
deleted file mode 100644
index 70fc060..0000000
--- a/planetwars-cli/src/match_runner/bot_runner.rs
+++ /dev/null
@@ -1,121 +0,0 @@
-use std::io;
-use std::path::PathBuf;
-use std::process::Stdio;
-use std::sync::Arc;
-use std::sync::Mutex;
-use tokio::io::{AsyncBufReadExt, AsyncWriteExt, BufReader, Lines};
-use tokio::process;
-use tokio::sync::mpsc;
-use tokio::time::timeout;
-
-use super::match_context::EventBus;
-use super::match_context::PlayerHandle;
-use super::match_context::RequestError;
-use super::match_context::RequestMessage;
-pub struct LocalBotHandle {
-    tx: mpsc::UnboundedSender<RequestMessage>,
-}
-
-impl PlayerHandle for LocalBotHandle {
-    fn send_request(&mut self, r: RequestMessage) {
-        self.tx
-            .send(r)
-            .expect("failed to send message to local bot");
-    }
-
-    fn send_info(&mut self, _msg: String) {
-        // TODO: log this somewhere
-        // drop info message
-    }
-}
-
-pub fn run_local_bot(player_id: u32, event_bus: Arc<Mutex<EventBus>>, bot: Bot) -> LocalBotHandle {
-    let (tx, rx) = mpsc::unbounded_channel();
-
-    let runner = LocalBotRunner {
-        event_bus,
-        rx,
-        player_id,
-        bot,
-    };
-    tokio::spawn(runner.run());
-
-    return LocalBotHandle { tx };
-}
-
-pub struct LocalBotRunner {
-    event_bus: Arc<Mutex<EventBus>>,
-    rx: mpsc::UnboundedReceiver<RequestMessage>,
-    player_id: u32,
-    bot: Bot,
-}
-
-impl LocalBotRunner {
-    pub async fn run(mut self) {
-        let mut process = self.bot.spawn_process();
-
-        while let Some(request) = self.rx.recv().await {
-            let resp_fut = process.communicate(&request.content);
-            let result = timeout(request.timeout, resp_fut)
-                .await
-                // TODO: how can this failure be handled cleanly?
-                .expect("process read failed");
-            let result = match result {
-                Ok(line) => Ok(line.into_bytes()),
-                Err(_elapsed) => Err(RequestError::Timeout),
-            };
-            let request_id = (self.player_id, request.request_id);
-
-            self.event_bus
-                .lock()
-                .unwrap()
-                .resolve_request(request_id, result);
-        }
-    }
-}
-
-#[derive(Debug, Clone)]
-pub struct Bot {
-    pub working_dir: PathBuf,
-    pub argv: Vec<String>,
-}
-
-impl Bot {
-    pub fn spawn_process(&self) -> BotProcess {
-        let mut child = process::Command::new(&self.argv[0])
-            .args(&self.argv[1..])
-            .current_dir(self.working_dir.clone())
-            .kill_on_drop(true)
-            .stdin(Stdio::piped())
-            .stdout(Stdio::piped())
-            .stderr(Stdio::inherit())
-            .spawn()
-            .expect("spawning failed");
-
-        let stdout = child.stdout.take().unwrap();
-        let reader = BufReader::new(stdout).lines();
-
-        return BotProcess {
-            stdin: child.stdin.take().unwrap(),
-            stdout: reader,
-            child,
-        };
-    }
-}
-
-pub struct BotProcess {
-    #[allow(dead_code)]
-    child: process::Child,
-    stdin: process::ChildStdin,
-    stdout: Lines<BufReader<process::ChildStdout>>,
-}
-
-impl BotProcess {
-    // TODO: gracefully handle errors
-    pub async fn communicate(&mut self, input: &[u8]) -> io::Result<String> {
-        self.stdin.write_all(input).await?;
-        self.stdin.write_u8(b'\n').await?;
-        let line = self.stdout.next_line().await?;
-        line.ok_or_else(|| io::Error::new(io::ErrorKind::UnexpectedEof, "no response received"))
-    }
-}
-- 
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