Add waybar available memory script for Linux.

ansible/roles/sway/files/waybar_available_memory_linux.bash

@@ -0,0 +1,32 @@
+#!/usr/bin/env bash
+#
+# Read memory usage in FreeBSD
+set -euo pipefail
+IFS=$'\n\t'
+DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+
+SLEEP_INTERVAL=${SLEEP_INTERVAL:-30}
+
+while true; do
+    memory_usage=$(free --bytes --wide)
+    total_bytes=$(grep 'Mem:' <<<"$memory_usage" | awk '{print $2}')
+    free_bytes=$(grep 'Mem:' <<<"$memory_usage" | awk '{print $4}')
+
+    free_percent=$((100 * free_bytes / total_bytes))
+    text=""
+
+    if [ $free_bytes -ge $((1024 * 1024 * 1024)) ]; then
+        text="$((free_bytes / 1024 / 1024 / 1024)) GiB"
+    fi
+
+    tooltip="${free_percent}%"
+
+    jq --unbuffered --compact-output <<EOF
+{
+"text":"${text}",
+"tooltip":"${tooltip}",
+"percentage":${free_percent}
+}
+EOF
+    sleep $SLEEP_INTERVAL
+done

ansible/roles/sway/tasks/freebsd.yaml

@@ -47,7 +47,7 @@
   loop:
     - src: launch_sway_freebsd.bash
       dest: /usr/local/bin/launch_sway
-    - src: waybar_battery_freebsd
+    - src: waybar_battery_freebsd.bash
       dest: /usr/local/bin/waybar_custom_battery
-    - src: waybar_available_memory_freebsd
+    - src: waybar_available_memory_freebsd.bash
       dest: /usr/local/bin/waybar_custom_available_memory

ansible/roles/sway/tasks/linux.yaml

@@ -8,5 +8,7 @@
   loop:
     - src: launch_sway_linux.bash
       dest: /usr/local/bin/launch_sway
-    - src: waybar_battery_linux
+    - src: waybar_battery_linux.bash
       dest: /usr/local/bin/waybar_custom_battery
+    - src: waybar_available_memory_linux.bash
+      dest: /usr/local/bin/waybar_custom_available_memory