From db8ff593eef1ce8abdb0b84406d79df6714f60e4 Mon Sep 17 00:00:00 2001
From: Siraaj Khandkar <siraaj@khandkar.net>
Date: Mon, 2 Nov 2020 20:18:50 -0500
Subject: [PATCH] Check if upower is on path before calling it

---
 home/lib/login_functions.sh | 51 ++++++++++++++++++++-----------------
 1 file changed, 27 insertions(+), 24 deletions(-)

diff --git a/home/lib/login_functions.sh b/home/lib/login_functions.sh
index c4a583a..e6c159d 100644
--- a/home/lib/login_functions.sh
+++ b/home/lib/login_functions.sh
@@ -431,30 +431,33 @@ flat_top_5() {
 motd_batt() {
     case "$(uname)" in
         'Linux')
-            upower --dump \
-            | awk '
-                /^Device:[ \t]+/ {
-                    device["path"] = $2
-                    next
-                }
-
-                /  battery/ && device["path"] {
-                    device["is_battery"] = 1
-                    next
-                }
-
-                /    percentage:/ && device["is_battery"] {
-                    device["battery_percentage"] = $2
-                    sub("%$", "", device["battery_percentage"])
-                    next
-                }
-
-                /^$/ {
-                    if (device["is_battery"] && device["path"] == "/org/freedesktop/UPower/devices/DisplayDevice")
-                        print device["battery_percentage"], 100, "batt"
-                    delete device
-                }
-            '
+            if which upower > /dev/null
+            then
+                upower --dump \
+                | awk '
+                    /^Device:[ \t]+/ {
+                        device["path"] = $2
+                        next
+                    }
+
+                    /  battery/ && device["path"] {
+                        device["is_battery"] = 1
+                        next
+                    }
+
+                    /    percentage:/ && device["is_battery"] {
+                        device["battery_percentage"] = $2
+                        sub("%$", "", device["battery_percentage"])
+                        next
+                    }
+
+                    /^$/ {
+                        if (device["is_battery"] && device["path"] == "/org/freedesktop/UPower/devices/DisplayDevice")
+                            print device["battery_percentage"], 100, "batt"
+                        delete device
+                    }
+                '
+            fi
         ;;
     esac
 }
-- 
2.20.1