Support --no-daemon flag to prevent daemonizing

src/lib.rs

@@ -82,25 +82,19 @@ pub fn desktop() -> Result<(), Box<dyn std::error::Error>> {
 /// Runs application with these settings
 #[rustfmt::skip]
 pub fn main() -> Result<(), Box<dyn std::error::Error>> {
-    #[cfg(all(unix, not(target_os = "redox")))]
-    match fork::daemon(true, true) {
-        Ok(fork::Fork::Child) => (),
-        Ok(fork::Fork::Parent(_child_pid)) => process::exit(0),
-        Err(err) => {
-            eprintln!("failed to daemonize: {:?}", err);
-            process::exit(1);
-        }
-    }
-
     env_logger::Builder::from_env(env_logger::Env::default().default_filter_or("warn")).init();
 
     localize::localize();
 
     let (config_handler, config) = Config::load();
 
+    let mut daemonize = true;
     let mut locations = Vec::new();
     for arg in env::args().skip(1) {
-        let location = if &arg == "--trash" {
+        let location = if &arg == "--no-daemon" {
+            daemonize = false;
+            continue;
+        } else if &arg == "--trash" {
             Location::Trash
         } else {
             match fs::canonicalize(&arg) {
@@ -114,6 +108,18 @@ pub fn main() -> Result<(), Box<dyn std::error::Error>> {
         locations.push(location);
     }
 
+    if daemonize {
+        #[cfg(all(unix, not(target_os = "redox")))]
+        match fork::daemon(true, true) {
+            Ok(fork::Fork::Child) => (),
+            Ok(fork::Fork::Parent(_child_pid)) => process::exit(0),
+            Err(err) => {
+                eprintln!("failed to daemonize: {:?}", err);
+                process::exit(1);
+            }
+        }
+    }
+
     let mut settings = Settings::default();
     settings = settings.theme(config.app_theme.theme());
     settings = settings.size_limits(Limits::NONE.min_width(360.0).min_height(180.0));