diff --git a/swap/src/cli/tracing.rs b/swap/src/cli/tracing.rs index 665fb457..bf011b54 100644 --- a/swap/src/cli/tracing.rs +++ b/swap/src/cli/tracing.rs @@ -1,31 +1,74 @@ use anyhow::Result; use std::fmt::Debug; use std::fs::OpenOptions; -use std::io; use std::io::Write; use std::option::Option::Some; use std::path::{Path, PathBuf}; -use tracing::{Event, Level, Subscriber}; -use tracing_subscriber::fmt::format::{DefaultFields, Format, Json, JsonFields}; +use tracing::field::Field; +use tracing::span::Attributes; +use tracing::{Id, Level, Subscriber}; +use tracing_subscriber::fmt::format::{Format, Json, JsonFields}; use tracing_subscriber::fmt::time::UtcTime; use tracing_subscriber::layer::{Context, SubscriberExt}; use tracing_subscriber::util::SubscriberInitExt; -use tracing_subscriber::{EnvFilter, fmt, FmtSubscriber, Layer, Registry, registry}; -use tracing_subscriber::fmt::{FormatEvent, MakeWriter}; +use tracing_subscriber::{EnvFilter, FmtSubscriber, Layer, Registry}; +use tracing_subscriber::fmt::{format, FormatEvent, MakeWriter}; use serde_json::{json, Value}; -use tracing::subscriber::set_global_default; +use serde::Serialize; + +#[derive(Debug, Serialize)] +struct LogEvent<'a> { + message: String, + level: &'a str, + target: &'a str, + module: &'a str, + file: Option<&'a str>, + line: Option, + fields: Value, +} +/// Transforms a `tracing::Event` into a JSON-formatted string. +fn format_event_as_json<'a, S>( + _: &Context<'a, S>, + event: &'a tracing::Event<'a>, +) -> serde_json::Result { + // Extracting fields from the event into a serde_json::Value + let mut fields = json!({}); + let mut message = String::new(); // For capturing the main message + + event.record(&mut |field: &Field, value: &dyn Debug| { + if field.name() == "message" { + message = format!("{:?}", value); + } else { + fields[field.name()] = json!(format!("{:?}", value)); + } + }); + + let log = LogEvent { + message, // Use the captured message here + level: event.metadata().level().as_str(), + target: event.metadata().target(), + module: event.metadata().module_path().unwrap_or_default(), + file: event.metadata().file(), + line: event.metadata().line(), + fields, + }; + + serde_json::to_string(&log) +} -pub struct MyMakeWriter { +struct SwapIdVisitor { + swap_id: Option, +} + +pub struct FileLayer { dir: PathBuf, - // other members like stdout and stderr if needed } -impl MyMakeWriter { +impl FileLayer { pub fn new(dir: impl AsRef) -> Self { Self { dir: dir.as_ref().to_path_buf(), - // initialize other members } } @@ -33,80 +76,69 @@ impl MyMakeWriter { self.dir.join(format!("swap-{}.log", swap_id)) } - fn get_file_writer(&self, swap_id: &str) -> io::Result { - OpenOptions::new().append(true).create(true).open(self.get_log_path(swap_id)) + fn append_to_file(&self, swap_id: &str, message: &str) -> std::io::Result<()> { + let path = self.get_log_path(swap_id); + let mut file = OpenOptions::new().append(true).create(true).open(path)?; + file.write_all(message.as_bytes()) } } -impl<'a> MakeWriter<'a> for MyMakeWriter { - type Writer = Box; - fn make_writer(&'a self) -> Self::Writer { - unreachable!(); +impl Layer for FileLayer + where + S: Subscriber + for<'a> tracing_subscriber::registry::LookupSpan<'a>, +{ + fn on_new_span(&self, attrs: &Attributes<'_>, id: &Id, ctx: Context<'_, S>) { + let mut visitor = SwapIdVisitor { swap_id: None }; + attrs.record(&mut visitor); + + if let Some(swap_id) = visitor.swap_id { + if let Some(span) = ctx.span(id) { + span.extensions_mut().insert(swap_id); + } + } } - fn make_writer_for(&'a self, meta: &tracing::Metadata<'_>) -> Self::Writer { - // Print all attributes of the event - println!("Event attributes: {:?}", meta); - let swap_id = "dummy-swap-id"; - - Box::new(self.get_file_writer(swap_id).expect("Failed to open log file")) + fn on_event(&self, event: &tracing::Event<'_>, ctx: Context<'_, S>) { + if let Some(current_span_id) = ctx.current_span().id() { + if let Some(span) = ctx.span(current_span_id) { + if let Some(swap_id) = span.extensions().get::() { + // TODO: This is a hack, I need to figure out how to get the JSON formatter to work + + if let Ok(json_log) = format_event_as_json(&ctx, event) { + self.append_to_file(swap_id, &format!("{}\n", json_log)) + .expect("Failed to write to file"); + } + } + } + } } } +impl tracing::field::Visit for SwapIdVisitor { + fn record_debug(&mut self, field: &Field, value: &dyn Debug) { + if field.name() == "swap_id" { + self.swap_id = Some(format!("{:?}", value)); + } + } +} pub fn init(debug: bool, json: bool, dir: impl AsRef) -> Result<()> { - let level_filter = EnvFilter::try_new("swap=debug")?; - let registry = Registry::default().with(level_filter); - + let level = if debug { Level::DEBUG } else { Level::INFO }; + let is_terminal = atty::is(atty::Stream::Stderr); - let file_logger = registry.with( - fmt::layer() - .with_ansi(false) - .with_target(false) - .json() - .with_writer(MyMakeWriter::new(dir)) - ); + let file_layer = FileLayer::new(dir.as_ref()); - set_global_default(file_logger.with(info_terminal_printer()))?; + FmtSubscriber::builder() + .with_env_filter(format!("swap={}", level)) + .with_writer(std::io::stderr) + .with_ansi(is_terminal) + .with_timer(UtcTime::rfc_3339()) + .with_target(false) + .finish() + .with(file_layer) + .init(); - //tracing::info!("Logging initialized to {}", dir.as_ref().display()); + tracing::info!("Logging initialized to {}", dir.as_ref().display()); Ok(()) } - -pub struct StdErrPrinter { - inner: L, - level: Level, -} - -type StdErrLayer = fmt::Layer< - S, - DefaultFields, - Format, - fn() -> io::Stderr, ->; - -fn info_terminal_printer() -> StdErrPrinter> { - let is_terminal = atty::is(atty::Stream::Stderr); - StdErrPrinter { - inner: fmt::layer() - .with_ansi(is_terminal) - .with_target(false) - .with_level(false) - .without_time() - .with_writer(std::io::stderr), - level: Level::INFO, - } -} - -impl Layer for StdErrPrinter - where - L: 'static + Layer, - S: Subscriber + for<'a> registry::LookupSpan<'a>, -{ - fn on_event(&self, event: &Event<'_>, ctx: Context<'_, S>) { - if self.level.ge(event.metadata().level()) { - self.inner.on_event(event, ctx); - } - } -} \ No newline at end of file