music/librespot: Various tweaks

* Use pulseaudio backend
* Run as separate librespot user
* Use linear volume mixer

roles/music/defaults/main.yaml

@@ -1,2 +1,5 @@
 music_audio_user: audio
+music_audio_group: audio
+music_librespot_user: librespot
+
 music_mqtt_mpd_volume: bitlair/music/space/volume

roles/music/handlers/main.yaml

@@ -8,13 +8,13 @@
     state: restarted
     daemon_reload: true
 
-- name: Rebuild librespot
+- name: rebuild librespot
   ansible.builtin.command:
-    cmd: /root/.cargo/bin/cargo build --release --features jackaudio-backend
+    cmd: /root/.cargo/bin/cargo build --release --features pulseaudio-backend
   args:
     chdir: /opt/librespot
 
-- name: Restart librespot
+- name: restart librespot
   ansible.builtin.systemd:
     name: librespot
     state: restarted

roles/music/tasks/librespot.yaml

@@ -1,8 +1,11 @@
 ---
-- name: Install dependencies
-  ansible.builtin.apt:
-    name: libjack-jackd2-dev
-    state: present
+- name: Create librespot user
+  user:
+    name: "{{ music_librespot_user }}"
+    system: true
+    home: /var/lib/librespot
+    groups:
+      - "{{ music_audio_group }}"
 
 - name: Clone librespot source
   ansible.builtin.git:
@@ -11,8 +14,8 @@
     dest: /opt/librespot
     accept_hostkey: yes
   notify:
-    - Rebuild librespot
-    - Restart librespot
+    - rebuild librespot
+    - restart librespot
 
 - name: Install service file
   ansible.builtin.template:
@@ -21,7 +24,7 @@
     owner: root
     group: root
     mode: 0644
-  notify: Restart librespot
+  notify: restart librespot
 
 - name: Enable Librespot
   ansible.builtin.systemd:
@@ -29,3 +32,5 @@
     state: started
     enabled: true
     daemon_reload: true
+
+- meta: flush_handlers

roles/music/templates/librespot.service

@@ -3,16 +3,15 @@
 [Unit]
 Description=Spotify through Librespot
 After=network.target
-Requires=jackd.service
 
 [Service]
 Type=simple
 Restart=always
 RestartSec=2s
-ExecStart=/opt/librespot/target/release/librespot --name Trollibox --backend jackaudio
-User={{ music_audio_user }}
-Group={{ music_audio_user }}
-AmbientCapabilities=CAP_IPC_LOCK,CAP_SYS_NICE
+ExecStart=/opt/librespot/target/release/librespot --name Trollibox --backend pulseaudio --volume-ctrl linear
+Environment="PULSE_SERVER=/tmp/pipewire-pulse-socket"
+Environment="XDG_RUNTIME_DIR=/run/user/0"
+User={{ music_librespot_user }}
 
 [Install]
 WantedBy=multi-user.target