From 00b72715aa496363dd3c783bd5b2ff965869c8c3 Mon Sep 17 00:00:00 2001
From: iximeow <me@iximeow.net>
Date: Mon, 3 Jul 2023 14:18:45 -0700
Subject: expose function for lua to run commands and collect output

onward, `rustc --version`!!
---
 src/io.rs | 41 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 41 insertions(+)

(limited to 'src/io.rs')

diff --git a/src/io.rs b/src/io.rs
index 50f9bad..f9f407f 100644
--- a/src/io.rs
+++ b/src/io.rs
@@ -6,6 +6,7 @@ use tokio::fs::OpenOptions;
 use std::task::{Poll, Context};
 use std::pin::Pin;
 use std::time::{UNIX_EPOCH, SystemTime};
+use std::sync::{Arc, Mutex};
 
 pub fn now_ms() -> u64 {
     SystemTime::now()
@@ -14,6 +15,46 @@ pub fn now_ms() -> u64 {
         .as_millis() as u64
 }
 
+#[derive(Clone)]
+pub struct VecSink {
+    body: Arc<Mutex<Vec<u8>>>,
+}
+
+impl VecSink {
+    pub fn new() -> Self {
+        Self { body: Arc::new(Mutex::new(Vec::new())) }
+    }
+
+    pub fn take_buf(&self) -> Vec<u8> {
+        std::mem::replace(&mut *self.body.lock().unwrap(), Vec::new())
+    }
+}
+
+impl tokio::io::AsyncWrite for VecSink {
+    fn poll_write(
+        self: Pin<&mut Self>,
+        cx: &mut Context,
+        buf: &[u8]
+    ) -> Poll<Result<usize, std::io::Error>> {
+        self.body.lock().unwrap().extend_from_slice(buf);
+        Poll::Ready(Ok(buf.len()))
+    }
+
+    fn poll_flush(
+        self: Pin<&mut Self>,
+        _cx: &mut Context
+    ) -> Poll<Result<(), std::io::Error>> {
+        Poll::Ready(Ok(()))
+    }
+
+    fn poll_shutdown(
+        self: Pin<&mut Self>,
+        _cx: &mut Context
+    ) -> Poll<Result<(), std::io::Error>> {
+        Poll::Ready(Ok(()))
+    }
+}
+
 pub struct ArtifactStream {
     sender: hyper::body::Sender,
 }
-- 
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