eh-log: add debug level; respect verbosity levels

Signed-off-by: NotAShelf <raf@notashelf.dev>
Change-Id: Idc62fd26efc10f0c1e49424cf337e6d16a6a6964

crates/eh-log/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name                   = "eh-log"
-description            = "Styled logging for eh"
+description            = "Tiny, styled logging crate for eh"
 version.workspace      = true
 edition.workspace      = true
 authors.workspace      = true

crates/eh-log/src/lib.rs

@@ -1,26 +1,64 @@
-use std::fmt;
+use std::{
+  fmt,
+  sync::atomic::{AtomicI8, Ordering},
+};
 
 use yansi::Paint;
 
+static VERBOSITY: AtomicI8 = AtomicI8::new(0);
+
+#[derive(Clone, Copy, Debug, Eq, PartialEq)]
+pub enum Level {
+  Error = -2,
+  Warn  = -1,
+  Info  = 0,
+  Debug = 1,
+}
+
+pub fn set_verbosity(verbosity: i8) {
+  VERBOSITY.store(verbosity, Ordering::Relaxed);
+}
+
+fn enabled(level: Level) -> bool {
+  VERBOSITY.load(Ordering::Relaxed) >= level as i8
+}
+
 pub fn info(args: fmt::Arguments) {
-  eprintln!("  {} {args}", "->".green().bold());
+  if enabled(Level::Info) {
+    eprintln!("  {} {args}", "->".green().bold());
+  }
+}
+
+pub fn debug(args: fmt::Arguments) {
+  if enabled(Level::Debug) {
+    eprintln!("  {} {args}", "*".blue().dim());
+  }
 }
 
 pub fn warn(args: fmt::Arguments) {
-  eprintln!("  {} {args}", "->".yellow().bold());
+  if enabled(Level::Warn) {
+    eprintln!("  {} {args}", "->".yellow().bold());
+  }
 }
 
 pub fn error(args: fmt::Arguments) {
-  eprintln!("  {} {args}", "!".red().bold());
+  if enabled(Level::Error) {
+    eprintln!("  {} {args}", "!".red().bold());
+  }
 }
 
 pub fn hint(args: fmt::Arguments) {
-  eprintln!("  {} {args}", "~".yellow().dim());
+  if enabled(Level::Info) {
+    eprintln!("  {} {args}", "~".yellow().dim());
+  }
 }
 
 #[macro_export]
 macro_rules! log_info  { ($($t:tt)*) => { $crate::info(format_args!($($t)*)) } }
 
+#[macro_export]
+macro_rules! log_debug { ($($t:tt)*) => { $crate::debug(format_args!($($t)*)) } }
+
 #[macro_export]
 macro_rules! log_warn  { ($($t:tt)*) => { $crate::warn(format_args!($($t)*)) } }