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PrintDebug(crossbeam_channel::Sender), + PrintState(tokio::sync::mpsc::UnboundedSender), + PrintDebug(tokio::sync::mpsc::UnboundedSender), } #[derive(Debug, Clone, PartialEq)] @@ -56,7 +56,7 @@ pub struct App { pub css_provider: gtk::CssProvider, pub app_evt_send: UnboundedSender, #[debug_stub = "ScriptVarHandler(...)"] - pub script_var_handler: ScriptVarHandler, + pub script_var_handler: ScriptVarHandlerHandle, } impl App { @@ -80,7 +80,7 @@ impl App { log::info!("Received kill command, stopping server!"); self.script_var_handler.stop_all(); self.windows.drain().for_each(|(_, w)| w.close()); - script_var_process::on_application_death(); + // script_var_process::on_application_death(); std::process::exit(0); } EwwCommand::CloseAll => { @@ -140,11 +140,7 @@ impl App { .filter(|var| !currently_used_vars.contains(*var)) { println!("stopping for {}", &unused_var); - let result = self.script_var_handler.stop_for_variable(unused_var); - crate::print_result_err!( - "While stopping script-var processes while cleaning up after the last window referencing them closed", - &result - ); + self.script_var_handler.stop_for_variable(unused_var.clone()); } window.close(); diff --git a/src/client.rs b/src/client.rs index aefde59..de43899 100644 --- a/src/client.rs +++ b/src/client.rs @@ -29,7 +29,9 @@ pub fn forward_command_to_server(mut stream: UnixStream, action: opts::ActionWit let mut buf = String::new(); stream.set_read_timeout(Some(std::time::Duration::from_millis(100)))?; - stream.read_to_string(&mut buf)?; + stream + .read_to_string(&mut buf) + .context("Error reading response from server")?; if !buf.is_empty() { println!("{}", buf); } diff --git a/src/config/script_var.rs b/src/config/script_var.rs index ac225c0..d71b18e 100644 --- a/src/config/script_var.rs +++ b/src/config/script_var.rs @@ -6,7 +6,7 @@ use crate::ensure_xml_tag_is; use super::*; -#[derive(Clone, Debug, PartialEq)] +#[derive(Clone, Debug, PartialEq, Eq)] pub struct PollScriptVar { pub name: VarName, pub command: String, @@ -19,13 +19,13 @@ impl PollScriptVar { } } -#[derive(Clone, Debug, PartialEq)] +#[derive(Clone, Debug, PartialEq, Eq)] pub struct TailScriptVar { pub name: VarName, pub command: String, } -#[derive(Clone, Debug, PartialEq)] +#[derive(Clone, Debug, PartialEq, Eq)] pub enum ScriptVar { Poll(PollScriptVar), Tail(TailScriptVar), diff --git a/src/opts.rs b/src/opts.rs index a4f681d..cbe35a9 100644 --- a/src/opts.rs +++ b/src/opts.rs @@ -126,7 +126,7 @@ fn parse_var_update_arg(s: &str) -> Result<(VarName, PrimitiveValue)> { } impl ActionWithServer { - pub fn into_eww_command(self) -> (app::EwwCommand, Option>) { + pub fn into_eww_command(self) -> (app::EwwCommand, Option>) { let command = match self { ActionWithServer::Daemon => app::EwwCommand::NoOp, ActionWithServer::Update { mappings } => app::EwwCommand::UpdateVars(mappings.into_iter().collect()), @@ -145,11 +145,11 @@ impl ActionWithServer { ActionWithServer::KillServer => app::EwwCommand::KillServer, ActionWithServer::CloseAll => app::EwwCommand::CloseAll, ActionWithServer::ShowState => { - let (send, recv) = crossbeam_channel::unbounded(); + let (send, recv) = tokio::sync::mpsc::unbounded_channel(); return (app::EwwCommand::PrintState(send), Some(recv)); } ActionWithServer::ShowDebug => { - let (send, recv) = crossbeam_channel::unbounded(); + let (send, recv) = tokio::sync::mpsc::unbounded_channel(); return (app::EwwCommand::PrintDebug(send), Some(recv)); } }; diff --git a/src/script_var_handler.rs b/src/script_var_handler.rs index 38251d9..027689e 100644 --- a/src/script_var_handler.rs +++ b/src/script_var_handler.rs @@ -1,8 +1,4 @@ -use std::{ - collections::HashMap, - sync::{Arc, RwLock}, - time::Duration, -}; +use std::collections::HashMap; use crate::{ app, config, @@ -11,30 +7,78 @@ use crate::{ use anyhow::*; use app::EwwCommand; -use dashmap::DashMap; -use std::io::BufRead; +use tokio::{ + io::{AsyncBufReadExt, BufReader}, + sync::mpsc::UnboundedSender, +}; +use tokio_util::sync::CancellationToken; -use self::script_var_process::ScriptVarProcess; -use tokio::sync::mpsc::UnboundedSender; +#[derive(Debug, Eq, PartialEq)] +enum ScriptVarHandlerMsg { + AddVar(config::ScriptVar), + Stop(VarName), + StopAll, +} + +pub struct ScriptVarHandlerHandle { + msg_send: UnboundedSender, +} + +impl ScriptVarHandlerHandle { + pub fn add(&self, script_var: config::ScriptVar) { + self.msg_send.send(ScriptVarHandlerMsg::AddVar(script_var)).unwrap(); + } + + pub fn stop_for_variable(&self, name: VarName) { + self.msg_send.send(ScriptVarHandlerMsg::Stop(name)).unwrap(); + } + + pub fn stop_all(&self) { + self.msg_send.send(ScriptVarHandlerMsg::StopAll).unwrap(); + } +} /// Handler that manages running and updating [ScriptVar]s -pub struct ScriptVarHandler { +struct ScriptVarHandler { tail_handler: TailVarHandler, poll_handler: PollVarHandler, } -impl ScriptVarHandler { - pub fn new(evt_send: UnboundedSender) -> Result { - Ok(ScriptVarHandler { - tail_handler: TailVarHandler::new(evt_send.clone())?, - poll_handler: PollVarHandler::new(evt_send)?, +pub fn init(evt_send: UnboundedSender) -> Result { + let (msg_send, mut msg_recv) = tokio::sync::mpsc::unbounded_channel(); + let handle = ScriptVarHandlerHandle { msg_send }; + std::thread::spawn(move || { + let rt = tokio::runtime::Runtime::new().unwrap(); + rt.block_on(async { + let _: Result<_> = try { + let mut handler = ScriptVarHandler { + tail_handler: TailVarHandler::new(evt_send.clone())?, + poll_handler: PollVarHandler::new(evt_send)?, + }; + while let Some(msg) = msg_recv.recv().await { + match msg { + ScriptVarHandlerMsg::AddVar(var) => { + handler.add(var).await; + } + ScriptVarHandlerMsg::Stop(name) => { + handler.stop_for_variable(&name)?; + } + ScriptVarHandlerMsg::StopAll => { + handler.stop_all(); + } + } + } + }; }) - } + }); + Ok(handle) +} - pub fn add(&mut self, script_var: config::ScriptVar) { +impl ScriptVarHandler { + pub async fn add(&mut self, script_var: config::ScriptVar) { match script_var { - config::ScriptVar::Poll(var) => self.poll_handler.start(&var), - config::ScriptVar::Tail(var) => self.tail_handler.start(&var), + config::ScriptVar::Poll(var) => self.poll_handler.start(var).await, + config::ScriptVar::Tail(var) => self.tail_handler.start(var).await, }; } @@ -62,136 +106,103 @@ impl Drop for ScriptVarHandler { struct PollVarHandler { evt_send: UnboundedSender, - poll_handles: HashMap, - poll_executor: scheduled_executor::CoreExecutor, + poll_handles: HashMap, } impl PollVarHandler { fn new(evt_send: UnboundedSender) -> Result { - Ok(PollVarHandler { + let handler = PollVarHandler { evt_send, poll_handles: HashMap::new(), - poll_executor: scheduled_executor::CoreExecutor::new()?, - }) + }; + Ok(handler) } - fn start(&mut self, var: &config::PollScriptVar) { + async fn start(&mut self, var: config::PollScriptVar) { + log::debug!("starting poll var {}", &var.name); + let cancellation_token = CancellationToken::new(); + self.poll_handles.insert(var.name.clone(), cancellation_token.clone()); let evt_send = self.evt_send.clone(); - let handle = self.poll_executor.schedule_fixed_interval( - Duration::from_secs(0), - var.interval, - glib::clone!(@strong var => move |_| { - let result: Result<_> = try { - evt_send.send(app::EwwCommand::UpdateVars(vec![(var.name.clone(), var.run_once()?)]))?; - }; - crate::print_result_err!("while running script-var command", &result); - }), - ); - self.poll_handles.insert(var.name.clone(), handle); + tokio::spawn(async move { + crate::loop_select! { + _ = cancellation_token.cancelled() => break, + _ = tokio::time::sleep(var.interval) => { + let result: Result<_> = try { + evt_send.send(app::EwwCommand::UpdateVars(vec![(var.name.clone(), var.run_once()?)]))?; + }; + crate::print_result_err!("while running script-var command", &result); + } + } + }); } pub fn stop_for_variable(&mut self, name: &VarName) -> Result<()> { - if let Some(handle) = self.poll_handles.remove(name) { + if let Some(token) = self.poll_handles.remove(name) { log::debug!("stopped poll var {}", name); - handle.stop(); + token.cancel() } Ok(()) } pub fn stop_all(&mut self) { - self.poll_handles.drain().for_each(|(_, handle)| handle.stop()); + self.poll_handles.drain().for_each(|(_, token)| token.cancel()); } } struct TailVarHandler { evt_send: UnboundedSender, - tail_handler_thread: Option>, - tail_process_handles: Arc>, - tail_sources: Arc>>, + tail_process_handles: HashMap, } impl TailVarHandler { fn new(evt_send: UnboundedSender) -> Result { - let mut handler = TailVarHandler { + let handler = TailVarHandler { evt_send, - tail_handler_thread: None, - tail_process_handles: Arc::new(DashMap::new()), - tail_sources: Arc::new(RwLock::new(popol::Sources::new())), + tail_process_handles: HashMap::new(), }; - handler.setup_tail_tasks()?; Ok(handler) } - fn setup_tail_tasks(&mut self) -> Result<()> { - log::info!("initializing handler for tail script vars"); + async fn start(&mut self, var: config::TailScriptVar) { + log::debug!("starting poll var {}", &var.name); + let cancellation_token = CancellationToken::new(); + self.tail_process_handles.insert(var.name.clone(), cancellation_token.clone()); - let mut events = popol::Events::::new(); let evt_send = self.evt_send.clone(); - - // TODO all of this is rather ugly - let script_var_processes = self.tail_process_handles.clone(); - let sources = self.tail_sources.clone(); - let thread_handle = stoppable_thread::spawn(move |stopped| { - while !stopped.get() { - let result: Result<_> = try { - { - let _ = sources - .write() - .unwrap() - .wait_timeout(&mut events, std::time::Duration::from_millis(50)); - } - for (var_name, event) in events.iter() { - if event.readable { - let mut handle = script_var_processes - .get_mut(var_name) - .with_context(|| format!("No command output handle found for variable '{}'", var_name))?; - let mut buffer = String::new(); - handle.stdout_reader.read_line(&mut buffer)?; - evt_send.send(EwwCommand::UpdateVars(vec![( - var_name.to_owned(), - PrimitiveValue::from_string(buffer.trim_matches('\n').to_owned()), - )]))?; - } else if event.hangup { - script_var_processes.remove(var_name); - sources.write().unwrap().unregister(var_name); - } - } - }; - crate::print_result_err!("in script-var tail handler thread", &result); + tokio::spawn(async move { + let mut handle = tokio::process::Command::new("sh") + .args(&["-c", &var.command]) + .stdout(std::process::Stdio::piped()) + .stderr(std::process::Stdio::inherit()) + .stdin(std::process::Stdio::null()) + .spawn() + .unwrap(); + let mut stdout_lines = BufReader::new(handle.stdout.take().unwrap()).lines(); + crate::loop_select! { + _ = handle.wait() => break, + _ = cancellation_token.cancelled() => break, + line = stdout_lines.next_line() => match line { + Ok(Some(line)) => { + let new_value = PrimitiveValue::from_string(line.to_owned()); + evt_send.send(EwwCommand::UpdateVars(vec![(var.name.to_owned(), new_value)])).unwrap(); + }, + Ok(None) => break, + Err(_e) => break, + } } - for process in script_var_processes.iter() { - crate::print_result_err!("While killing tail-var process at the end of tail task", &process.kill()); - } - script_var_processes.clear(); }); - self.tail_handler_thread = Some(thread_handle); - Ok(()) - } - - fn start(&mut self, var: &config::TailScriptVar) { - match ScriptVarProcess::run(&var.command) { - Ok(process) => { - self.tail_sources.write().unwrap().register( - var.name.clone(), - process.stdout_reader.get_ref(), - popol::interest::READ, - ); - self.tail_process_handles.insert(var.name.clone(), process); - } - Err(err) => eprintln!("Failed to launch script-var command for tail: {:?}", err), - } } fn stop_for_variable(&mut self, name: &VarName) -> Result<()> { - if let Some((_, process)) = self.tail_process_handles.remove(name) { + if let Some(token) = self.tail_process_handles.remove(name) { log::debug!("stopped tail var {}", name); - process.kill()?; + token.cancel(); } Ok(()) } fn stop_all(&mut self) { - self.tail_handler_thread.take().map(|handle| handle.stop()); + self.tail_process_handles.drain().for_each(|(_, token)| token.cancel()); } } diff --git a/src/server.rs b/src/server.rs index d63aa18..9f22782 100644 --- a/src/server.rs +++ b/src/server.rs @@ -1,7 +1,7 @@ use crate::{app, config, eww_state::*, opts, script_var_handler, try_logging_errors, util}; use anyhow::*; use futures_util::StreamExt; -use std::{collections::HashMap, os::unix::io::AsRawFd, path::Path}; +use std::{collections::HashMap, os::unix::io::AsRawFd, path::Path, time::Duration}; use tokio::{ io::{AsyncReadExt, AsyncWriteExt}, sync::mpsc::*, @@ -16,7 +16,7 @@ pub fn initialize_server(should_detach: bool, action: opts::ActionWithServer) -> simple_signal::set_handler(&[simple_signal::Signal::Int, simple_signal::Signal::Term], |_| { println!("Shutting down eww daemon..."); - script_var_handler::script_var_process::on_application_death(); + // script_var_handler::script_var_process::on_application_death(); std::process::exit(0); }); @@ -35,7 +35,7 @@ pub fn initialize_server(should_detach: bool, action: opts::ActionWithServer) -> let glib_context = glib::MainContext::default(); log::info!("Initializing script var handler"); - let script_var_handler = script_var_handler::ScriptVarHandler::new(ui_send.clone())?; + let script_var_handler = script_var_handler::init(ui_send.clone())?; let mut app = app::App { eww_state: EwwState::from_default_vars(eww_config.generate_initial_state()?), @@ -59,14 +59,9 @@ pub fn initialize_server(should_detach: bool, action: opts::ActionWithServer) -> let (command, maybe_response_recv) = action.into_eww_command(); app.handle_command(command); - // print out the response of this initial command, if there is any - if let Some(response_recv) = maybe_response_recv { - if let Ok(response) = response_recv.recv_timeout(std::time::Duration::from_millis(100)) { - println!("{}", response); - } - } std::thread::spawn(move || { let rt = tokio::runtime::Builder::new_multi_thread() + .enable_all() .build() .expect("Failed to initialize tokio runtime"); rt.block_on(async { @@ -76,11 +71,20 @@ pub fn initialize_server(should_detach: bool, action: opts::ActionWithServer) -> }; let ipc_server_join_handle = tokio::spawn(async move { async_server(ui_send.clone()).await }); + tokio::spawn(async { + // print out the response of this initial command, if there is any + if let Some(mut response_recv) = maybe_response_recv { + if let Ok(Some(response)) = tokio::time::timeout(Duration::from_millis(100), response_recv.recv()).await { + println!("{}", response); + } + } + }); + let result = tokio::try_join!(filewatch_join_handle, ipc_server_join_handle); if let Err(e) = result { eprintln!("Eww exiting with error: {:?}", e); } - }); + }) }); glib_context.spawn_local(async move { @@ -122,12 +126,14 @@ async fn handle_connection(mut stream: tokio::net::UnixStream, evt_send: Unbound evt_send.send(command)?; - if let Some(response_recv) = maybe_response_recv { - if let Ok(response) = response_recv.recv_timeout(std::time::Duration::from_millis(100)) { + if let Some(mut response_recv) = maybe_response_recv { + log::info!("Waiting for response for IPC client"); + if let Ok(Some(response)) = tokio::time::timeout(Duration::from_millis(100), response_recv.recv()).await { let result = &stream_write.write_all(response.as_bytes()).await; crate::print_result_err!("Sending text response to ipc client", &result); } } + stream_write.shutdown().await?; Ok(()) } diff --git a/src/util.rs b/src/util.rs index d18e6a6..8dccd05 100644 --- a/src/util.rs +++ b/src/util.rs @@ -39,6 +39,17 @@ macro_rules! print_result_err { }}; } +#[macro_export] +macro_rules! loop_select { + ($($body:tt)*) => { + loop { + ::tokio::select! { + $($body)* + }; + } + } +} + /// read an scss file, replace all environment variable references within it and /// then parse it into css. pub fn parse_scss_from_file>(path: P) -> Result {