From f0c129c9f1b662e0497fef24eaf039c65344ffd6 Mon Sep 17 00:00:00 2001
From: Jeremy Soller <jeremy@system76.com>
Date: Tue, 29 Dec 2020 09:54:17 -0700
Subject: [PATCH] power.sh: Only show battery information if battery exists

---
 power.sh | 26 +++++++++++++++++++-------
 1 file changed, 19 insertions(+), 7 deletions(-)

diff --git a/power.sh b/power.sh
index 3029913..db54a2f 100755
--- a/power.sh
+++ b/power.sh
@@ -2,6 +2,12 @@
 
 set -e
 
+has_bat=0
+if [ -d /sys/class/power_supply/BAT0/ ]
+then
+    has_bat=1
+fi
+
 has_ec=0
 if ./ectool.sh info 2> /dev/null
 then
@@ -27,7 +33,10 @@ do
     if [ "${header}" == "1" ]
     then
         F="Time    "
-        F="${F}\tBAT W"
+        if [ "${has_bat}" == "1" ]
+        then
+            F="${F}\tBAT W"
+        fi
         F="${F}\tCPU W"
         F="${F}\tCPU PL1"
         F="${F}\tCPU PL2"
@@ -53,12 +62,15 @@ do
         last_E="$(cat /sys/class/powercap/intel-rapl\:0/energy_uj)"
         sleep 1
 
-        uV="$(cat /sys/class/power_supply/BAT0/voltage_now)"
-        V="$(echo "${uV}/1000000" | bc -lq)"
-        uA="$(cat /sys/class/power_supply/BAT0/current_now)"
-        A="$(echo "${uA}/1000000" | bc -lq)"
-        bat_W="$(echo "${V} * ${A}" | bc -lq)"
-        F="${F}\t$(printf "%.2f" "${bat_W}")"
+        if [ "${has_bat}" == "1" ]
+        then
+            uV="$(cat /sys/class/power_supply/BAT0/voltage_now)"
+            V="$(echo "${uV}/1000000" | bc -lq)"
+            uA="$(cat /sys/class/power_supply/BAT0/current_now)"
+            A="$(echo "${uA}/1000000" | bc -lq)"
+            bat_W="$(echo "${V} * ${A}" | bc -lq)"
+            F="${F}\t$(printf "%.2f" "${bat_W}")"
+        fi
 
         E="$(cat /sys/class/powercap/intel-rapl\:0/energy_uj)"
         W="$(echo "(${E} - ${last_E})/1000000" | bc -lq)"