logging

Cargo.toml

@@ -7,3 +7,5 @@ edition = "2021"
 glium = "0.32"
 glutin = "*"
 image = { version = "0.24", default_features = false, features = ["png"] }
+log = "0.4"
+env_logger = "0.10"

src/game.rs

@@ -11,9 +11,13 @@ use assets::Assets;
 use display::init_display;
 
 pub fn run() {
+    log::info!("starting up");
     let event_loop = EventLoop::new();
+    log::info!("initializing display");
     let display = init_display(&event_loop);
+    log::info!("loading assets");
     let assets = Assets::load_all_sync(&display);
+    log::info!("game loaded");
 
     event_loop.run(move |ev, _, control_flow| {
         match ev {

src/game/assets/textures.rs

@@ -2,6 +2,8 @@ use std::{fs, io};
 use glium::texture::{RawImage2d, SrgbTexture2d};
 
 fn load_png(file_path: &str, display: &glium::Display) -> SrgbTexture2d {
+    log::info!("loading texture {}", file_path);
+
     //Load file
     let data = fs::read(file_path)
         .expect(&format!("Failed to load texture: {}", file_path));

src/logging.rs

@@ -0,0 +1,45 @@
+//! Custom env_logger options and styling
+
+use env_logger::{fmt::Color, Builder, Env};
+use log::Level;
+use std::io::Write;
+
+pub fn init() {
+    let mut env = Env::default();
+    if cfg!(debug_assertions) {
+        env = env.filter_or("RUST_LOG", "info");
+    }
+    Builder::from_env(env)
+        .format(|buf, record| {
+            let mut level_style = buf.style();
+            level_style.set_color(match record.level() {
+                Level::Error => Color::Red,
+                Level::Warn => Color::Yellow,
+                _ => Color::Blue
+            }).set_bold(true);
+
+            let mut location_style = buf.style();
+            location_style.set_bold(true);
+            location_style.set_dimmed(true);
+
+            let mut location_line_style = buf.style();
+            location_line_style.set_dimmed(true);
+
+            writeln!(
+                buf,
+                "{} {:<50}\t{}{}{}",
+                level_style.value(match record.level() {
+                    Level::Error => "[e]",
+                    Level::Warn =>  "[w]",
+                    Level::Info =>  "[i]",
+                    Level::Debug => "[d]",
+                    Level::Trace => "[t]",
+                }),
+                format!("{}", record.args()),
+                location_style.value(record.module_path().unwrap_or("<unknown>")),
+                location_line_style.value(" :"),
+                location_line_style.value(record.line().unwrap_or(0))
+            )
+        })
+        .init();
+}

src/main.rs

@@ -1,5 +1,7 @@
 mod game;
+mod logging;
 
 fn main() {
+    logging::init();
     game::run();
 }