add an option to change the log level

src/app.rs

@@ -6,10 +6,10 @@
 use anyhow::{Context, Result};
 
 use crate::configuration::{Configuration, SwitchDirection};
-use crate::display_control;
 use crate::logging;
 use crate::platform::{wake_displays, PnPDetect};
 use crate::usb;
+use crate::{display_control, Args};
 
 pub struct App {
     config: Configuration,
@@ -38,8 +38,8 @@ impl usb::UsbCallback for App {
 }
 
 impl App {
-    pub fn new() -> Result<Self> {
-        logging::init_logging().context("failed to initialize logging")?;
+    pub fn new(args: Args) -> Result<Self> {
+        logging::init_logging(args.debug).context("failed to initialize logging")?;
         info!(
             "display-switch v{version} built on {timestamp} from git {git}",
             version = env!("CARGO_PKG_VERSION"),

src/logging.rs

@@ -10,16 +10,17 @@ use simplelog::*;
 
 use crate::configuration::Configuration;
 
-pub fn init_logging() -> Result<()> {
+pub fn init_logging(log_debug: bool) -> Result<()> {
+    let log_level = if log_debug {
+        LevelFilter::Debug
+    } else {
+        LevelFilter::Info
+    };
+
     Ok(CombinedLogger::init(vec![
-        TermLogger::new(
-            LevelFilter::Debug,
-            Config::default(),
-            TerminalMode::Mixed,
-            ColorChoice::Auto,
-        ),
+        TermLogger::new(log_level, Config::default(), TerminalMode::Mixed, ColorChoice::Auto),
         WriteLogger::new(
-            LevelFilter::Debug,
+            log_level,
             Config::default(),
             File::create(Configuration::log_file_name()?)?,
         ),

src/main.rs

@@ -24,6 +24,9 @@ mod usb;
 #[derive(Parser, Debug)]
 #[command(version)]
 struct Args {
+    /// Print debug information
+    #[arg(short, long, default_value_t = false)]
+    debug: bool,
 }
 
 /// On Windows, re-attach the console, if parent process has the console. This allows
@@ -39,7 +42,7 @@ fn main() -> Result<()> {
     attach_console();
     let args = Args::parse();
 
-    let app = app::App::new()?;
+    let app = app::App::new(args)?;
     app.run()?;
     Ok(())
 }