fix: read stderr in download (#1486)

#1186

launcher/src/main.rs

@@ -4,7 +4,7 @@ use nix::unistd::Pid;
 use serde::Deserialize;
 use std::env;
 use std::ffi::OsString;
-use std::io::{BufRead, BufReader, Lines, Read};
+use std::io::{BufRead, BufReader, Lines};
 use std::os::unix::process::{CommandExt, ExitStatusExt};
 use std::path::Path;
 use std::process::{Child, Command, ExitStatus, Stdio};
@@ -489,6 +489,9 @@ fn shard_manager(
     // Safetensors load fast
     envs.push(("SAFETENSORS_FAST_GPU".into(), "1".into()));
 
+    // Disable progress bar
+    envs.push(("HF_HUB_DISABLE_PROGRESS_BARS".into(), "1".into()));
+
     // Enable hf transfer for insane download speeds
     let enable_hf_transfer = env::var("HF_HUB_ENABLE_HF_TRANSFER").unwrap_or("1".to_string());
     envs.push((
@@ -573,6 +576,13 @@ fn shard_manager(
     thread::spawn(move || {
         log_lines(shard_stdout_reader.lines());
     });
+    // We read stderr in another thread as it seems that lines() can block in some cases
+    let (err_sender, err_receiver) = mpsc::channel();
+    thread::spawn(move || {
+        for line in shard_stderr_reader.lines().flatten() {
+            err_sender.send(line).unwrap_or(());
+        }
+    });
 
     let mut ready = false;
     let start_time = Instant::now();
@@ -580,13 +590,6 @@ fn shard_manager(
     loop {
         // Process exited
         if let Some(exit_status) = p.try_wait().unwrap() {
-            // We read stderr in another thread as it seems that lines() can block in some cases
-            let (err_sender, err_receiver) = mpsc::channel();
-            thread::spawn(move || {
-                for line in shard_stderr_reader.lines().flatten() {
-                    err_sender.send(line).unwrap_or(());
-                }
-            });
             let mut err = String::new();
             while let Ok(line) = err_receiver.recv_timeout(Duration::from_millis(10)) {
                 err = err + "\n" + &line;
@@ -782,6 +785,9 @@ fn download_convert_model(args: &Args, running: Arc<AtomicBool>) -> Result<(), L
     // Copy current process env
     let mut envs: Vec<(OsString, OsString)> = env::vars_os().collect();
 
+    // Disable progress bar
+    envs.push(("HF_HUB_DISABLE_PROGRESS_BARS".into(), "1".into()));
+
     // If huggingface_hub_cache is set, pass it to the download process
     // Useful when running inside a docker container
     if let Some(ref huggingface_hub_cache) = args.huggingface_hub_cache {
@@ -832,12 +838,20 @@ fn download_convert_model(args: &Args, running: Arc<AtomicBool>) -> Result<(), L
         }
     };
 
-    // Redirect STDOUT to the console
-    let download_stdout = download_process.stdout.take().unwrap();
-    let stdout = BufReader::new(download_stdout);
+    let download_stdout = BufReader::new(download_process.stdout.take().unwrap());
+
+    thread::spawn(move || {
+        log_lines(download_stdout.lines());
+    });
 
+    let download_stderr = BufReader::new(download_process.stderr.take().unwrap());
+
+    // We read stderr in another thread as it seems that lines() can block in some cases
+    let (err_sender, err_receiver) = mpsc::channel();
     thread::spawn(move || {
-        log_lines(stdout.lines());
+        for line in download_stderr.lines().flatten() {
+            err_sender.send(line).unwrap_or(());
+        }
     });
 
     loop {
@@ -848,12 +862,10 @@ fn download_convert_model(args: &Args, running: Arc<AtomicBool>) -> Result<(), L
             }
 
             let mut err = String::new();
-            download_process
-                .stderr
-                .take()
-                .unwrap()
-                .read_to_string(&mut err)
-                .unwrap();
+            while let Ok(line) = err_receiver.recv_timeout(Duration::from_millis(10)) {
+                err = err + "\n" + &line;
+            }
+
             if let Some(signal) = status.signal() {
                 tracing::error!(
                     "Download process was signaled to shutdown with signal {signal}: {err}"