gui: display logs when starting daemon

gui/Cargo.toml

@@ -15,6 +15,7 @@ path = "src/main.rs"
 
 [dependencies]
 async-hwi = "0.0.12"
+crossbeam-channel = "0.5"
 liana = { git = "https://github.com/wizardsardine/liana", branch = "master", default-features = false, features = ["nonblocking_shutdown"] }
 liana_ui = { path = "ui" }
 backtrace = "0.3"

gui/src/loader.rs

@@ -44,13 +44,16 @@ pub struct Loader {
     pub daemon_started: bool,
     pub internal_bitcoind: Option<Bitcoind>,
     pub waiting_daemon_bitcoind: bool,
+    pub receiver: crossbeam_channel::Receiver<String>,
 
     step: Step,
 }
 
 pub enum Step {
     Connecting,
-    StartingDaemon,
+    StartingDaemon {
+        liana_logs: String,
+    },
     Syncing {
         daemon: Arc<dyn Daemon + Sync + Send>,
         progress: f64,
@@ -77,7 +80,7 @@ pub enum Message {
     ),
     Started(Result<(Arc<dyn Daemon + Sync + Send>, Option<Bitcoind>), Error>),
     Loaded(Result<Arc<dyn Daemon + Sync + Send>, Error>),
-    BitcoindLog(Option<String>),
+    LogMessage(Option<String>),
     Failure(DaemonError),
 }
 
@@ -87,6 +90,7 @@ impl Loader {
         gui_config: GUIConfig,
         network: bitcoin::Network,
         internal_bitcoind: Option<Bitcoind>,
+        receiver: crossbeam_channel::Receiver<String>,
     ) -> (Self, Command<Message>) {
         let path = gui_config
             .daemon_rpc_path
@@ -102,6 +106,7 @@ impl Loader {
                 daemon_started: false,
                 internal_bitcoind,
                 waiting_daemon_bitcoind: false,
+                receiver,
             },
             Command::perform(connect(path), Message::Loaded),
         )
@@ -128,7 +133,9 @@ impl Loader {
                 | Error::Daemon(DaemonError::Transport(Some(ErrorKind::ConnectionRefused), _))
                 | Error::Daemon(DaemonError::Transport(Some(ErrorKind::NotFound), _)) => {
                     if let Some(daemon_config_path) = self.gui_config.daemon_config_path.clone() {
-                        self.step = Step::StartingDaemon;
+                        self.step = Step::StartingDaemon {
+                            liana_logs: String::new(),
+                        };
                         self.daemon_started = true;
                         self.waiting_daemon_bitcoind = true;
                         return Command::perform(
@@ -153,7 +160,11 @@ impl Loader {
     }
 
     fn on_log(&mut self, log: Option<String>) -> Command<Message> {
-        if let Step::Syncing { bitcoind_logs, .. } = &mut self.step {
+        if let Step::StartingDaemon { liana_logs } = &mut self.step {
+            if let Some(l) = log {
+                *liana_logs = l;
+            }
+        } else if let Step::Syncing { bitcoind_logs, .. } = &mut self.step {
             if let Some(l) = log {
                 *bitcoind_logs = l;
             }
@@ -254,14 +265,15 @@ impl Loader {
                     self.gui_config.clone(),
                     self.network,
                     self.internal_bitcoind.clone(),
+                    self.receiver.clone(),
                 );
                 *self = loader;
                 cmd
             }
             Message::Started(res) => self.on_start(res),
             Message::Loaded(res) => self.on_load(res),
             Message::Syncing(res) => self.on_sync(res),
-            Message::BitcoindLog(log) => self.on_log(log),
+            Message::LogMessage(log) => self.on_log(log),
             Message::Synced(Err(e)) => {
                 self.step = Step::Error(Box::new(e));
                 Command::none()
@@ -275,6 +287,16 @@ impl Loader {
     }
 
     pub fn subscription(&self) -> Subscription<Message> {
+        if let Step::StartingDaemon { .. } = self.step {
+            return iced::subscription::unfold(1, self.receiver.clone(), move |recv| async {
+                let log_msg = match recv.recv() {
+                    Ok(msg) => msg,
+                    Err(e) => e.to_string(),
+                };
+
+                (Message::LogMessage(Some(log_msg)), recv)
+            });
+        }
         if let Some(Some(bitcoind_stdout)) =
             self.internal_bitcoind.as_ref().map(|b| b.stdout.clone())
         {
@@ -284,8 +306,8 @@ impl Loader {
                     let mut s = std::io::BufReader::new(s.deref_mut());
                     let mut buffer = String::new();
                     match s.read_line(&mut buffer) {
-                        Err(e) => Message::BitcoindLog(Some(e.to_string())),
-                        Ok(_) => Message::BitcoindLog(Some(buffer)),
+                        Err(e) => Message::LogMessage(Some(e.to_string())),
+                        Ok(_) => Message::LogMessage(Some(buffer)),
                     }
                 };
                 (msg, stdout)
@@ -342,12 +364,13 @@ pub enum ViewMessage {
 
 pub fn view(step: &Step) -> Element<ViewMessage> {
     match &step {
-        Step::StartingDaemon => cover(
+        Step::StartingDaemon { liana_logs } => cover(
             None,
             Column::new()
                 .width(Length::Fill)
                 .push(ProgressBar::new(0.0..=1.0, 0.0).width(Length::Fill))
-                .push(text("Starting daemon...")),
+                .push(text("Starting daemon..."))
+                .push(p2_regular(liana_logs).style(color::GREY_3)),
         ),
         Step::Connecting => cover(
             None,

gui/src/logger.rs

@@ -1,14 +1,17 @@
 use liana::miniscript::bitcoin::Network;
 use std::path::PathBuf;
 use std::{fs::File, sync::Arc};
-use tracing::error;
+use tracing::{error, Event, Subscriber};
 use tracing_subscriber::{
     filter,
     fmt::{format, writer::BoxMakeWriter, Layer},
+    layer,
     prelude::*,
     reload, Registry,
 };
 
+use crossbeam_channel::unbounded;
+
 const INSTALLER_LOG_FILE_NAME: &str = "installer.log";
 const GUI_LOG_FILE_NAME: &str = "liana-gui.log";
 
@@ -36,6 +39,7 @@ pub struct Logger {
         Registry,
     >,
     level_handle: reload::Handle<filter::LevelFilter, Registry>,
+    receiver: crossbeam_channel::Receiver<String>,
 }
 
 impl Logger {
@@ -47,6 +51,8 @@ impl Logger {
             .with_file(false);
         let (file_log, file_handle) = reload::Layer::new(file_log);
         let stdout_log = tracing_subscriber::fmt::layer().pretty().with_file(false);
+        let channel = unbounded::<String>();
+        let streamer_log = LogStream { sender: channel.0 }.with_filter(filter::LevelFilter::INFO);
         tracing_subscriber::registry()
             .with(
                 stdout_log
@@ -68,10 +74,12 @@ impl Logger {
                             && !metadata.target().starts_with("ledger_transport_hid")
                     })),
             )
+            .with(streamer_log)
             .init();
         Self {
             file_handle,
             level_handle,
+            receiver: channel.1,
         }
     }
 
@@ -117,4 +125,37 @@ impl Logger {
         self.level_handle.modify(|filter| *filter = log_level)?;
         Ok(())
     }
+
+    pub fn receiver(&self) -> crossbeam_channel::Receiver<String> {
+        self.receiver.clone()
+    }
+}
+
+pub struct LogStream {
+    pub sender: crossbeam_channel::Sender<String>,
+}
+
+impl<S> layer::Layer<S> for LogStream
+where
+    S: Subscriber + for<'a> tracing_subscriber::registry::LookupSpan<'a>,
+{
+    fn on_event(&self, event: &Event<'_>, _ctx: layer::Context<'_, S>) {
+        let mut visitor = LogStreamVisitor {
+            sender: self.sender.clone(),
+        };
+        event.record(&mut visitor);
+    }
+}
+
+struct LogStreamVisitor {
+    sender: crossbeam_channel::Sender<String>,
+}
+
+impl tracing::field::Visit for LogStreamVisitor {
+    fn record_debug(&mut self, field: &tracing::field::Field, value: &dyn std::fmt::Debug) {
+        if field.name() == "message" {
+            let msg = format!("{:?}", value);
+            let _ = self.sender.send(msg);
+        }
+    }
 }

gui/src/main.rs

@@ -142,7 +142,8 @@ impl Application for GUI {
                     network,
                     cfg.log_level().unwrap_or(LevelFilter::INFO),
                 );
-                let (loader, command) = Loader::new(datadir_path, cfg, network, None);
+                let (loader, command) =
+                    Loader::new(datadir_path, cfg, network, None, logger.receiver());
                 (
                     Self {
                         state: State::Loader(Box::new(loader)),
@@ -189,7 +190,8 @@ impl Application for GUI {
                         network,
                         cfg.log_level().unwrap_or(LevelFilter::INFO),
                     );
-                    let (loader, command) = Loader::new(datadir_path, cfg, network, None);
+                    let (loader, command) =
+                        Loader::new(datadir_path, cfg, network, None, self.logger.receiver());
                     self.state = State::Loader(Box::new(loader));
                     command.map(|msg| Message::Load(Box::new(msg)))
                 }
@@ -217,6 +219,7 @@ impl Application for GUI {
                         cfg,
                         daemon_cfg.bitcoin_config.network,
                         internal_bitcoind,
+                        self.logger.receiver(),
                     );
                     self.state = State::Loader(Box::new(loader));
                     command.map(|msg| Message::Load(Box::new(msg)))