From cd76bf5f941fa63537ec769f2c8fcc656d83e367 Mon Sep 17 00:00:00 2001
From: r0chd <oskarrochowiak@gmail.com>
Date: Tue, 14 Jul 2026 15:25:13 +0200
Subject: [PATCH] feat(config): add default-seat field in config

---
 daemon/src/config.rs | 9 ++++++++-
 daemon/src/main.rs   | 9 ++++-----
 nix/common.nix       | 1 +
 3 files changed, 13 insertions(+), 6 deletions(-)

diff --git a/daemon/src/config.rs b/daemon/src/config.rs
index 7bcb3aa..4f32ffb 100644
--- a/daemon/src/config.rs
+++ b/daemon/src/config.rs
@@ -65,7 +65,7 @@ pub struct UserConfig {
 }
 
 #[derive(serde::Deserialize)]
-#[serde(deny_unknown_fields)]
+#[serde(deny_unknown_fields, rename_all = "kebab-case")]
 pub struct Config {
     #[serde(default)]
     pub management: ManagementConfig,
@@ -73,6 +73,8 @@ pub struct Config {
     pub users: BTreeMap<String, UserConfig>,
     #[serde(default = "default_seats")]
     pub seats: BTreeMap<String, SeatConfig>,
+    #[serde(default = "default_seat")]
+    pub default_seat: String,
 }
 
 impl Default for Config {
@@ -81,6 +83,7 @@ impl Default for Config {
             management: ManagementConfig::default(),
             users: BTreeMap::new(),
             seats: default_seats(),
+            default_seat: "seat0".to_string(),
         }
     }
 }
@@ -89,6 +92,10 @@ fn default_seats() -> BTreeMap<String, SeatConfig> {
     BTreeMap::from([("seat0".to_string(), SeatConfig::default())])
 }
 
+fn default_seat() -> String {
+    "seat0".to_string()
+}
+
 impl Config {
     pub fn load(path: Option<path::PathBuf>) -> anyhow::Result<Self> {
         let explicit_path = path.is_some();
diff --git a/daemon/src/main.rs b/daemon/src/main.rs
index a0ef357..6a7c4c1 100644
--- a/daemon/src/main.rs
+++ b/daemon/src/main.rs
@@ -162,12 +162,11 @@ fn run<C: cgroup::CgroupManager + 'static>(
         config.settings.seats.len() == 1,
         "exactly one seat must be configured"
     );
-    let (seat_name, seat_config) = config
+    let seat_config = config
         .settings
         .seats
-        .iter()
-        .next()
-        .ok_or_else(|| anyhow::anyhow!("exactly one seat must be configured"))?;
+        .get(&config.settings.default_seat)
+        .ok_or_else(|| anyhow::anyhow!("configured `default-seat` not found"))?;
 
     let mut sessiond = Sessiond {
         next_session_id: session::SessionId::from_raw(1),
@@ -196,7 +195,7 @@ fn run<C: cgroup::CgroupManager + 'static>(
 
     let seat_entity = ecs::insert_seat(
         &mut sessiond.world,
-        seat_name.clone(),
+        config.settings.default_seat.clone(),
         if vtbound {
             ecs::SeatKind::VtBound
         } else {
diff --git a/nix/common.nix b/nix/common.nix
index eb1d497..d2e20ba 100644
--- a/nix/common.nix
+++ b/nix/common.nix
@@ -38,6 +38,7 @@ in
   };
 
   config = lib.mkIf cfg.enable {
+    services.sessiond.settings.default-seat = lib.mkDefault "seat0";
     services.sessiond.settings.seats.seat0 = {
       user = lib.mkDefault "root";
       group = lib.mkDefault "seat";
-- 
2.51.2