Start lorri with sytemd

Whenever possible, prefer starting things as systemd units instead of
instantiating them in ~/.profile and other dotfiles.

configs/shared/.config/systemd/user/lorri.service

@@ -0,0 +1,12 @@
+[Unit]
+ConditionUser=!@system
+Description=Lorri build daemon
+After=lorri.socket
+Wants=lorri.socket
+
+[Service]
+ExecStart=%h/.nix-profile/bin/lorri daemon
+PrivateTmp=true
+ProtectSystem=strict
+Restart=on-failure
+WorkingDirectory=%h

configs/shared/.config/systemd/user/lorri.socket

@@ -0,0 +1,9 @@
+[Unit]
+Description=Lorri build daemon
+
+[Socket]
+ListenStream=%t/lorri/daemon.socket
+RuntimeDirectory=lorri
+
+[Install]
+WantedBy=sockets.target

configs/shared/.profile

@@ -51,6 +51,9 @@ eval "$(ssh-agent -s)"
 # TODO: Prefer `systemctl start docker.service`
 dockerd &
 
+# Start lorri
+systemctl --user start lorri.service
+
 # Set environment variables for Nix. Don't run this for systems running NixOS.
 # TODO: Learn why I can't use the variables from ~/briefcase/.envrc.
 case $(hostname) in
@@ -58,8 +61,3 @@ case $(hostname) in
   seneca) . ~/.nix-profile/etc/profile.d/nix.sh;;
   wpcarro.c.googlers.com) . ~/.nix-profile/etc/profile.d/nix.sh;;
 esac
-
-# NOTE: `lorri` needs to be below the calls to source Nix environment since it's
-# installed with `nix-env -iA nixpkgs.lorri`.
-# Start lorri daemon
-lorri daemon &