Add sound to waybar on FreeBSD.

ansible/roles/sway/files/style.css

@@ -53,6 +53,7 @@
 #custom-available_memory,
 #custom-battery,
 #custom-clock,
+#custom-sound,
 #idle_inhibitor,
 #memory,
 #mode,

ansible/roles/sway/files/waybar_config.json

@@ -1,7 +1,7 @@
 {
   // "height": 10, // Waybar height (to be removed for auto height)
   "modules-left": ["sway/workspaces", "sway/mode"],
-  "modules-right": ["custom/available_memory", "custom/battery", "idle_inhibitor", "custom/clock", "tray"],
+  "modules-right": ["custom/sound", "custom/available_memory", "custom/battery", "idle_inhibitor", "custom/clock", "tray"],
   "sway/workspaces": {
     "disable-scroll": true
   },
@@ -33,6 +33,10 @@
     "exec": "waybar_custom_available_memory",
     "return-type": "json",
     "restart-interval": 30
+  },
+  "custom/sound": {
+    "exec": "waybar_custom_sound",
+    "return-type": "json",
+    "restart-interval": 30
   }
-
 }

ansible/roles/sway/files/waybar_sound_freebsd.bash

@@ -0,0 +1,36 @@
+#!/usr/bin/env bash
+#
+# Read volume status in FreeBSD
+set -euo pipefail
+IFS=$'\n\t'
+DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+
+SLEEP_INTERVAL=${SLEEP_INTERVAL:-30}
+
+while true; do
+    current_vol_mixer=$(mixer -S vol)
+    vol_left=$(cut -d ':' -f 2 <<<"$current_vol_mixer")
+    vol_right=$(cut -d ':' -f 3 <<<"$current_vol_mixer")
+    avg_vol=$(((vol_left + vol_right) / 2))
+    tooltip="<tt>$(mixer)</tt>"
+    class=""
+    icon=""
+
+    if [ $avg_vol -eq 0 ]; then
+        icon="🔇"
+    elif [ $avg_vol -le 50 ]; then
+        icon="🔉"
+    else
+        icon="🔊"
+    fi
+
+    jq --unbuffered --compact-output <<EOF
+{
+"text":"${avg_vol}% ${icon}",
+"tooltip":"${tooltip//$'\n'/\\n}",
+"percentage":${avg_vol},
+"class":"${class}"
+}
+EOF
+    sleep $SLEEP_INTERVAL
+done