Add --headless mode (no stdin read, runs until SIGTERM/exit) + systemd/NixOS examples

2026-10-18 15:24:20 +00:00
parent c204e1ef0c
commit 01a821ab72
7 changed files with 144 additions and 9 deletions
@@ -0,0 +1,23 @@
+# Sausage as a systemd service. Create the world once as the service user:
+#   nix run git+https://gitea.surma.technology/surma/sausage -- init /var/lib/sausage/world
+# Then: install as /etc/systemd/system/sausage.service, `systemctl enable --now sausage`.
+# Adjust User and the path to `nix`.
+[Unit]
+Description=Sausage world
+After=network-online.target
+Wants=network-online.target
+
+[Service]
+User=sausage
+WorkingDirectory=/var/lib/sausage
+# The loop restarts the host (newest version) after a crash or a broker `exit`.
+# --headless: no console, stdin EOF does not stop the world.
+ExecStart=/run/current-system/sw/bin/nix run git+https://gitea.surma.technology/surma/sausage#loop -- --headless /var/lib/sausage/world
+Restart=on-failure
+RestartSec=5
+# SIGTERM stops the host cleanly (exit code 0).
+KillMode=control-group
+TimeoutStopSec=30
+
+[Install]
+WantedBy=multi-user.target