feat(pipewire): Add alsa integration

Any programs running through alsa only (such as spotify_player on
voidlinux) should now also work correctly through the pipewire stack.

roles/display_manager/defaults/main.yaml

@@ -0,0 +1,8 @@
+---
+# should the system automatically login as the primary user
+dm_auto_login: true
+
+# default command to run on login
+# can be pause if we use services to start graphical env
+# otherwise a shell, e.g. zsh makes sense
+dm_command: pause

roles/display_manager/tasks/main.yaml

@@ -22,6 +22,15 @@
     mode: 0644
     force: true
 
+- name: Enable power management for _greeter user
+  ansible.builtin.copy:
+    content: "_greeter ALL=(ALL) NOPASSWD: /usr/sbin/shutdown, /usr/bin/reboot, /usr/bin/poweroff, /usr/bin/shutdown"
+    dest: "/etc/sudoers.d/30-greeter"
+    owner: root
+    group: root
+    mode: 0644
+    force: true
+
 - name: Activate greetd service
   ansible.builtin.file:
     src: "/etc/sv/greetd"

roles/display_manager/templates/greetd-config.toml.j2

@@ -5,9 +5,14 @@ vt = 7
 
 # The default session, also known as the greeter.
 [default_session]
-command = "tuigreet --cmd zsh"
+command = "tuigreet --cmd {{ dm_command }}"
+command = "tuigreet --power-reboot 'sudo reboot' --power-shutdown 'sudo poweroff' --cmd {{ dm_command }}"
 user = "{{ greeter_user }}"
 
+[initial_session]
+command = "{{ dm_command }}"
+user = "{{ user_name | default('root') }}"
+
 # `agreety` is the bundled agetty/login-lookalike. You can replace `/bin/sh`
 # with whatever you want started, such as `sway`.
 # command = "agreety --cmd /bin/sh"