feat: logging support and proper error handling

src/logging.rs

@@ -0,0 +1,53 @@
+use color_eyre::Result;
+use dirs::data_dir;
+use std::env;
+use strip_ansi_escapes::Writer;
+use tracing_appender::non_blocking::{NonBlocking, WorkerGuard};
+use tracing_error::ErrorLayer;
+use tracing_subscriber::fmt::{Layer, MakeWriter};
+use tracing_subscriber::prelude::*;
+use tracing_subscriber::{fmt, EnvFilter};
+
+struct MakeFileWriter {
+    file_writer: NonBlocking,
+}
+
+impl MakeFileWriter {
+    const fn new(file_writer: NonBlocking) -> Self {
+        Self { file_writer }
+    }
+}
+
+impl<'a> MakeWriter<'a> for MakeFileWriter {
+    type Writer = Writer<NonBlocking>;
+
+    fn make_writer(&'a self) -> Self::Writer {
+        Writer::new(self.file_writer.clone())
+    }
+}
+
+pub fn install_tracing() -> Result<WorkerGuard> {
+    let fmt_layer = fmt::layer().with_target(true);
+    let filter_layer = EnvFilter::try_from_default_env().or_else(|_| EnvFilter::try_new("info"))?;
+    let file_filter_layer =
+        EnvFilter::try_from_default_env().or_else(|_| EnvFilter::try_new("warn"))?;
+
+    let log_path = data_dir().unwrap_or(env::current_dir()?).join("ironbar");
+
+    let appender = tracing_appender::rolling::never(log_path, "error.log");
+    let (file_writer, guard) = tracing_appender::non_blocking(appender);
+
+    tracing_subscriber::registry()
+        .with(filter_layer)
+        .with(fmt_layer)
+        .with(ErrorLayer::default())
+        .with(
+            Layer::default()
+                .with_writer(MakeFileWriter::new(file_writer))
+                .with_ansi(false)
+                .with_filter(file_filter_layer),
+        )
+        .init();
+
+    Ok(guard)
+}