remove: hostname command dependency

add: history-grep alias
fix: supress arch-updates output when no updates

.config/polybar/launch.sh

@@ -6,7 +6,7 @@ killall -q polybar
 # Wait until the processes have been shut down
 while pgrep -u $UID -x polybar >/dev/null; do sleep 1; done
 
-host_name=$(hostname)
+host_name=$(cat /proc/sys/kernel/hostname)
 if [[ $host_name == "portalo" ]]; then
     polybar portalo-primary &
     polybar portalo-secondary &

.config/polybar/scripts/arch-updates.sh

@@ -1,3 +1,7 @@
 #!/bin/sh
 
-echo $(pacman -Qu | wc -l)
+pkg_updates_count=$(pacman -Qu | wc -l)
+if [ $((pkg_updates_count)) -gt 0 ]
+then
+    echo $pkg_updates_count
+fi