Set up the desktop wrapper

game/desktop_wrapper/Cargo.toml

@@ -5,5 +5,17 @@ version = "0.1.0"
 edition = "2021"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+[dependencies]
+game_logic = { version = "*", path = "../game_logic" }
+tokio = { version = "1.17.0", features = ["macros", "rt-multi-thread"] }
+fern = { version = "0.6", features = ["colored"] }
+thiserror = "1.0.30"
+profiling = { version = "1.0.5", features = ["profile-with-puffin"] }
+chrono = "0.4.19"
+log = "0.4.14"
+clap = { version = "3.1.6", features = ["derive"] }
+puffin_http = "0.10.0"
+puffin = "0.13.1"
 
-[dependencies]
+[dev-dependencies]
+puffin_viewer = "0.11.0"

game/desktop_wrapper/src/cli.rs

@@ -0,0 +1,11 @@
+//! This module contains some code for handling CLI flags
+use clap::Parser;
+
+/// Ludum Dare 50 game
+#[derive(Parser, Debug)]
+#[clap( version, about, long_about = None)]
+pub struct Args {
+    /// Use verbose logging
+    #[clap(short, long)]
+    pub verbose: bool,
+}

game/desktop_wrapper/src/debug_profiling.rs

@@ -0,0 +1,18 @@
+//! This module handles enabling the remote-attach profiler when running in debug mode.
+
+/// When in debug mode, this will set up profiling. (note: this will cause very slight lag)
+#[must_use]
+pub fn init_profiling() -> Option<puffin_http::Server> {
+    if cfg!(debug_assertions) {
+        // Enable the puffin HTTP service
+        let server =
+            puffin_http::Server::new(&format!("0.0.0.0:{}", puffin_http::DEFAULT_PORT)).unwrap();
+
+        // Enable puffin itself
+        puffin::set_scopes_on(true);
+
+        Some(server)
+    } else {
+        None
+    }
+}

game/desktop_wrapper/src/logging.rs

@@ -0,0 +1,76 @@
+//! This module contains some bootstrapping code for setting up logging.
+
+use std::env::temp_dir;
+
+use chrono::Utc;
+use fern::colors::ColoredLevelConfig;
+use log::LevelFilter;
+use thiserror::Error;
+
+/// Error definitions for setting up the logging system
+#[derive(Error, Debug)]
+pub enum LoggingSystemInitError {
+    /// Error caused by a failure to set the global logger
+    #[error(transparent)]
+    SetLoggerError(#[from] log::SetLoggerError),
+
+    /// Error caused by a failure to open the filesystem log location
+    #[error(transparent)]
+    IoError(#[from] std::io::Error),
+}
+
+/// Sets up global logging for an application
+#[profiling::function]
+pub fn init_logging_system(
+    tool_name: &str,
+    log_level: Option<LevelFilter>,
+) -> Result<(), LoggingSystemInitError> {
+    // Set up coloring system for STDIO logs
+    let stdio_colors = ColoredLevelConfig::default();
+
+    // Set up a dispatcher for STDIO
+    // This will skip over un-needed verbosity
+    log::trace!("Setting up STDIO logging");
+    let stdio_dispatch = fern::Dispatch::new()
+        .format(move |out, message, record| {
+            out.finish(format_args!(
+                "{}: {}",
+                stdio_colors.color(record.level()),
+                message
+            ))
+        })
+        .level(log_level.unwrap_or(LevelFilter::Info))
+        .chain(std::io::stdout());
+
+    // Determine where to write the logfile
+    let log_file_path = temp_dir().join(format!("{}.{}.log", tool_name, Utc::now().timestamp()));
+    log::info!(
+        "A verbose copy of the application log will be written to: {}",
+        log_file_path.display()
+    );
+
+    // Set up a dispatcher for the logfile
+    log::trace!("Setting up file logging");
+    let fs_dispatch = fern::Dispatch::new()
+        // Perform allocation-free log formatting
+        .format(|out, message, record| {
+            out.finish(format_args!(
+                "{}[{}][{}] {}",
+                chrono::Local::now().format("[%Y-%m-%d][%H:%M:%S]"),
+                record.target(),
+                record.level(),
+                message
+            ))
+        })
+        .level(LevelFilter::Debug)
+        .chain(fern::log_file(log_file_path)?);
+
+    // Combine and apply the dispatchers
+    log::trace!("Setting up global logger");
+    fern::Dispatch::new()
+        .chain(stdio_dispatch)
+        .chain(fs_dispatch)
+        .apply()?;
+
+    Ok(())
+}

game/desktop_wrapper/src/main.rs

@@ -1,4 +1,35 @@
+//! # This file is probably not what you are looking for.
+//!
+//! In order to keep compile times reasonable, this crate is split into a `bin` and `lib` part, this being `bin`.
+//! All this crate is designed to do is bootstrap the game, and call `game_logic::entrypoint()` to *actually* start the game.
 
-fn main(){
+use clap::StructOpt;
-    
+use log::LevelFilter;
-}
+
+mod cli;
+mod logging;
+mod debug_profiling;
+
+#[tokio::main]
+async fn main() {
+    // Set up CLI args
+    let args = cli::Args::parse();
+
+    // Enable profiling
+    let _profile_handle = debug_profiling::init_profiling();
+
+    // Set up logging
+    logging::init_logging_system(
+        "ldjam50",
+        match args.verbose {
+            true => Some(LevelFilter::Debug),
+            false => None,
+        },
+    )
+    .expect("Failed to initialize logging system");
+
+    // Start the game
+    log::info!("Starting game");
+    game_logic::entrypoint().await;
+    log::info!("Goodbye!");
+}

game/game_logic/src/lib.rs

@@ -0,0 +1,3 @@
+/// This is the game logic entrypoint. Despite being async, 
+/// this is expected to block the main thread for rendering and stuff.
+pub async fn entrypoint() {}