From 7531a055b2b1935124bc44dc1e7925e4e0e122e8 Mon Sep 17 00:00:00 2001
From: Pig Monkey <pm@pig-monkey.com>
Date: Thu, 28 Jan 2016 20:27:55 -0800
Subject: [PATCH] warn on low battery

Addresses part of #18
---
 roles/laptop/files/lowbatt.sh | 15 +++++++++++++++
 roles/laptop/files/udev.rules |  1 +
 roles/laptop/tasks/main.yml   |  5 ++++-
 3 files changed, 20 insertions(+), 1 deletion(-)
 create mode 100755 roles/laptop/files/lowbatt.sh

diff --git a/roles/laptop/files/lowbatt.sh b/roles/laptop/files/lowbatt.sh
new file mode 100755
index 0000000..7aa4143
--- /dev/null
+++ b/roles/laptop/files/lowbatt.sh
@@ -0,0 +1,15 @@
+#!/bin/sh
+
+capacity='low'
+
+# Try to get an actual percentage.
+if [ -f /sys/class/power_supply/BAT0/capacity ]; then
+    capacity="at `cat /sys/class/power_supply/BAT0/capacity`%"
+fi
+
+# Build the message body.
+message="Battery is $capacity. We need more power, Scotty!"
+
+# Make some noise.
+notify-send --urgency=critical "Low Battery" "$message"
+wall "Battery is low. $message"
diff --git a/roles/laptop/files/udev.rules b/roles/laptop/files/udev.rules
index e5d6aa6..9e181ad 100644
--- a/roles/laptop/files/udev.rules
+++ b/roles/laptop/files/udev.rules
@@ -1 +1,2 @@
+SUBSYSTEM=="power_supply", ATTR{status}=="Discharging", ATTR{capacity}=="[5-10]", RUN+="/usr/local/bin/lowbatt.sh"
 SUBSYSTEM=="power_supply", ATTR{status}=="Discharging", ATTR{capacity}=="[0-5]", RUN+="/usr/bin/systemctl suspend"
diff --git a/roles/laptop/tasks/main.yml b/roles/laptop/tasks/main.yml
index c088537..c269869 100644
--- a/roles/laptop/tasks/main.yml
+++ b/roles/laptop/tasks/main.yml
@@ -5,5 +5,8 @@
 - name: Copy logind configuration file
   copy: src=logind.conf dest=/etc/systemd/logind.conf
 
-- name: Push udev rule to suspend on low battery
+- name: Push low battery warning script
+  copy: src=lowbatt.sh dest=/usr/local/bin/lowbatt mode=0755
+
+- name: Push low battery udev rules
   copy: src=udev.rules dest=/etc/udev/rules.d/99-lowbat.rules