👷 logger: use tracing crate for logging spans

Cargo.toml

@@ -25,6 +25,9 @@ reqwest = { version = "0.12", features = ["blocking", "json"] }
 unic-langid = "0.9"
 phf = { version = "0.11", features = ["macros"], default-features = false }
 chwd = { git = "https://github.com/CachyOS/chwd", rev = "3b288ba0d86b1d078057eb7f3d50b562959fd17a", version = "1.11.0" }
+tracing = "0.1"
+tracing-subscriber = { version = "0.3", features = ["env-filter"] }
+tracing-appender = "0.2"
 
 [build-dependencies]
 anyhow = "1"

src/logger.rs

@@ -0,0 +1,35 @@
+use crate::utils;
+
+use tracing_appender::non_blocking::WorkerGuard;
+use tracing_subscriber::prelude::*;
+use tracing_subscriber::EnvFilter;
+
+pub fn setup_logger() -> WorkerGuard {
+    // set log level from RUST_LOG env var
+    let env_filter = EnvFilter::try_from_default_env();
+
+    // create subscriber env filter
+    let subscriber_env_filter =
+        env_filter.unwrap_or_else(|_| EnvFilter::new("debug,i18n_embed=warn"));
+
+    // create stdout layer
+    let stdout_log = tracing_subscriber::fmt::layer().compact().with_writer(std::io::stdout);
+
+    // create just a file appender, without rolling
+    let file_appender = tracing_appender::rolling::never(
+        utils::fix_path("~/.config/cachyos/cachyos-hello"),
+        "cachyos-hello.log",
+    );
+
+    let (non_blocking, _guard) = tracing_appender::non_blocking(file_appender);
+    let file_log =
+        tracing_subscriber::fmt::layer().compact().with_ansi(false).with_writer(non_blocking);
+
+    tracing_subscriber::registry()
+        .with(file_log)
+        .with(stdout_log)
+        .with(subscriber_env_filter)
+        .init();
+
+    _guard
+}