added time remaining support to battery segment on Linux

README.md

@@ -116,7 +116,7 @@ with the environment variables detailed below with their default values.
 
 In addition to the above it supports standard _FOREGROUND value without affecting the icon color
 
-Supports both OS X and Linux(time remaining is only output in OS X)
+Supports both OS X and Linux(time remaining requires the acpi program on Linux)
 
 
 ##### context

powerlevel9k.zsh-theme

@@ -670,6 +670,10 @@ prompt_battery() {
     if [[ ! $connected =~ true ]]; then
       [[ $bat_percent -lt $POWERLEVEL9K_BATTERY_LOW_THRESHOLD ]] && local conn="%F{$POWERLEVEL9K_BATTERY_LOW_COLOR}" || local conn="%F{$POWERLEVEL9K_BATTERY_DISCONNECTED}"
     fi
+    if [[ -f /usr/bin/acpi ]]; then
+      [[ $(acpi | awk '{ print $5 }') =~ rate ]] && local tstring="..." || local tstring=${(f)$(date -u -d @$(acpi | awk '{ print $5 }' | sed s/://g) +%k:%M)}
+    fi
+    [[ ! -z $tstring ]] && local remain=" ($tstring)"
   fi
 
   # display prompt_segment