Pass existing CLI parameters to SpawnNewInstance

Co-authored-by: Christian Duerr <contact@christianduerr.com>

3 files changed, 21 insertions, 4 deletions

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4e84ec91..b8e4b224 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -31,6 +31,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - Fallback to normal underline for unsupported underline types in `CSI 4 : ? m` escapes
 - The user's background color is now used as the foreground for the render timer
 - Use yellow/red from the config for error and warning messages instead of fixed colors
+- Existing CLI parameters are now passed to instances spawned using `SpawnNewInstance`
 
 ### Fixed
 
diff --git a/alacritty/src/event.rs b/alacritty/src/event.rs
index c3e1b6c8..e81dc0f9 100644
--- a/alacritty/src/event.rs
+++ b/alacritty/src/event.rs
@@ -299,10 +299,11 @@ impl<'a, N: Notify + 'a, T: EventListener> input::ActionContext<T> for ActionCon
     }
 
     fn spawn_new_instance(&mut self) {
-        let alacritty = env::args().next().unwrap();
+        let mut env_args = env::args();
+        let alacritty = env_args.next().unwrap();
 
         #[cfg(unix)]
-        let args = {
+        let mut args = {
             // Use working directory of controlling process, or fallback to initial shell.
             let mut pid = unsafe { libc::tcgetpgrp(tty::master_fd()) };
             if pid < 0 {
@@ -314,12 +315,27 @@ impl<'a, N: Notify + 'a, T: EventListener> input::ActionContext<T> for ActionCon
             #[cfg(target_os = "freebsd")]
             let link_path = format!("/compat/linux/proc/{}/cwd", pid);
 
+            // Add the current working directory as parameter.
             fs::read_link(link_path)
                 .map(|path| vec!["--working-directory".into(), path])
                 .unwrap_or_default()
         };
+
         #[cfg(not(unix))]
-        let args: Vec<String> = Vec::new();
+        let mut args: Vec<PathBuf> = Vec::new();
+
+        let working_directory_set = !args.is_empty();
+
+        // Reuse the arguments passed to Alacritty for the new instance.
+        while let Some(arg) = env_args.next() {
+            // Drop working directory from existing parameters.
+            if working_directory_set && arg == "--working-directory" {
+                let _ = env_args.next();
+                continue;
+            }
+
+            args.push(arg.into());
+        }
 
         start_daemon(&alacritty, &args);
     }
diff --git a/alacritty_terminal/src/term/mod.rs b/alacritty_terminal/src/term/mod.rs
index 15499e07..d61cf7e3 100644
--- a/alacritty_terminal/src/term/mod.rs
+++ b/alacritty_terminal/src/term/mod.rs
@@ -2823,7 +2823,7 @@ mod benches {
 
         let config = MockConfig::default();
 
-        let mut terminal = Term::new(&config, &size, Mock);
+        let mut terminal = Term::new(&config, size, Mock);
         mem::swap(&mut terminal.grid, &mut grid);
 
         b.iter(|| {