From 4ec4ca0e6385e9e68c76025c545176a05c635c1a Mon Sep 17 00:00:00 2001
From: Tom Alexander <tom@fizz.buzz>
Date: Fri, 28 Oct 2022 20:45:19 -0400
Subject: [PATCH] Add free memory to FreeBSD's waybar.

---
 .../roles/base/files/cleanup_temporary_files  |  2 +-
 ansible/roles/sway/files/style.css            |  1 +
 .../files/waybar_available_memory_freebsd     | 32 +++++++++++++++++++
 ansible/roles/sway/files/waybar_config.json   |  8 ++++-
 ansible/roles/sway/tasks/freebsd.yaml         |  2 ++
 5 files changed, 43 insertions(+), 2 deletions(-)
 create mode 100644 ansible/roles/sway/files/waybar_available_memory_freebsd

diff --git a/ansible/roles/base/files/cleanup_temporary_files b/ansible/roles/base/files/cleanup_temporary_files
index dd30936..71827a4 100644
--- a/ansible/roles/base/files/cleanup_temporary_files
+++ b/ansible/roles/base/files/cleanup_temporary_files
@@ -1,4 +1,4 @@
 #!/usr/bin/env bash
 #
 # Delete temporary files on entire disk
-find / -type f -name '*.orig' -delete -or -name '*~' -delete
+find / -type f -name '*.orig' -delete -or -name '*~' -delete -print
diff --git a/ansible/roles/sway/files/style.css b/ansible/roles/sway/files/style.css
index 08510bf..1da6e35 100644
--- a/ansible/roles/sway/files/style.css
+++ b/ansible/roles/sway/files/style.css
@@ -50,6 +50,7 @@
 #battery,
 #clock,
 #cpu,
+#custom-available_memory,
 #custom-battery,
 #custom-clock,
 #idle_inhibitor,
diff --git a/ansible/roles/sway/files/waybar_available_memory_freebsd b/ansible/roles/sway/files/waybar_available_memory_freebsd
new file mode 100644
index 0000000..482ac06
--- /dev/null
+++ b/ansible/roles/sway/files/waybar_available_memory_freebsd
@@ -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=${SLEEP_INTERVAL:-30}
+
+while true; do
+    page_size=$(sysctl -n hw.pagesize)
+    free_pages=$(sysctl -n vm.stats.vm.v_free_count)
+    free_bytes=$((page_size * free_pages))
+    total_pages=$(sysctl -n vm.stats.vm.v_page_count)
+    free_percent=$((100 * free_pages / total_pages))
+    text=""
+
+    if [ $free_bytes > $((1024 * 1024 * 1024)) ]; then
+        text="$((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
diff --git a/ansible/roles/sway/files/waybar_config.json b/ansible/roles/sway/files/waybar_config.json
index 88049f8..be41923 100644
--- a/ansible/roles/sway/files/waybar_config.json
+++ b/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/battery", "idle_inhibitor", "custom/clock", "tray"],
+  "modules-right": ["custom/available_memory", "custom/battery", "idle_inhibitor", "custom/clock", "tray"],
   "sway/workspaces": {
     "disable-scroll": true
   },
@@ -28,5 +28,11 @@
     "exec": "waybar_custom_battery",
     "return-type": "json",
     "restart-interval": 30
+  },
+  "custom/available_memory": {
+    "exec": "waybar_custom_available_memory",
+    "return-type": "json",
+    "restart-interval": 30
   }
+
 }
diff --git a/ansible/roles/sway/tasks/freebsd.yaml b/ansible/roles/sway/tasks/freebsd.yaml
index b65a04c..f23f6a3 100644
--- a/ansible/roles/sway/tasks/freebsd.yaml
+++ b/ansible/roles/sway/tasks/freebsd.yaml
@@ -49,3 +49,5 @@
       dest: /usr/local/bin/launch_sway
     - src: waybar_battery_freebsd
       dest: /usr/local/bin/waybar_custom_battery
+    - src: waybar_available_memory_freebsd
+      dest: /usr/local/bin/waybar_custom_available_memory