basic logging support

.vscode/settings.json

@@ -0,0 +1,6 @@
+{
+    "rust-analyzer.linkedProjects": [
+        "./Cargo.toml"
+    ],
+    "rust-analyzer.showUnlinkedFileNotification": false
+}

Cargo.toml

@@ -7,3 +7,4 @@ edition = "2021"
 
 [dependencies]
 smithay = "0.3.0"
+lazy_static = "1.4.0"

src/backend/logger.rs

@@ -0,0 +1,16 @@
+lazy_static! {
+    pub static ref LOG_FILE: Mutex<BufWriter<File>> = {
+        // here we would add the code to grab the location of the log file from the config file.
+        // for now, im just using "waycrab.log", which would just place the log file next to the executable. probably.
+        let writer = BufWriter::new(File::options().append(true).create(true).write(true).open("waycrab.log").unwrap());
+        writer.into()
+    };
+}
+
+use std::{io::{BufWriter, Write}, fs::File, sync::Mutex};
+
+pub fn log(entry: &str) {
+    let mut log = LOG_FILE.lock().unwrap();
+    log.write_all(entry.as_bytes()).unwrap();
+    log.flush().unwrap();
+}

src/backend/mod.rs

@@ -0,0 +1 @@
+pub mod logger;

src/main.rs

@@ -1,3 +1,9 @@
+#[macro_use]
+extern crate lazy_static;
+
+mod backend;
+
 fn main() {
     println!("Hello, world!");
+    backend::logger::log("Hello, world!");
 }

waycrab.log

@@ -0,0 +1 @@
+Hello, world!