refactor: split cli and logging to separate crates

slogger/Cargo.toml

@@ -0,0 +1,6 @@
+[package]
+name = "slogger"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]

slogger/src/lib.rs

@@ -0,0 +1,46 @@
+use std::{fmt::Display, sync::OnceLock};
+
+pub static LOG_LEVEL: OnceLock<Level> = OnceLock::new();
+
+#[allow(dead_code)]
+#[derive(Debug, PartialEq, Eq, PartialOrd, Ord)]
+pub enum Level {
+    Error,
+    Warn,
+    Info,
+    Debug,
+}
+
+impl Display for Level {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        write!(
+            f,
+            "{}]\x1b[0m",
+            match self {
+                Self::Error => "\x1b[1;31m[ERROR",
+                Self::Warn => "\x1b[1;33m[WARN",
+                Self::Info => "\x1b[0;32m[INFO",
+                Self::Debug => "\x1b[0;36m[DEBUG",
+            }
+        )
+    }
+}
+
+/// A logging macro. Takes a [`Level`] and a formatted string.
+#[macro_export]
+macro_rules! log {
+    ($level:expr, $($arg:tt)*) => {{
+        if &$level <= $crate::LOG_LEVEL.get().unwrap_or(&$crate::Level::Info) {
+            println!(
+                "{} {}:{}:{}: {}",
+                $level,
+                std::module_path!(),
+                std::file!(),
+                std::line!(),
+                format!($($arg)*)
+            );
+        }
+    }};
+}
+
+// todo: implement clean verbose/short logging