Merge pull request #1641 from NeuralSandwich/master

Battery plugin updates

plugins/battery/battery.plugin.zsh

@@ -46,17 +46,27 @@ if [[ $(uname) == "Darwin" ]] ; then
       fi
       echo "%{$fg[$color]%}[$(battery_pct_remaining)%%]%{$reset_color%}"
     else
-      echo ""
+      echo "∞"
     fi
   }
 
 elif [[ $(uname) == "Linux"  ]] ; then
 
+  function battery_pct_remaining() {
+    if [[ $(acpi 2&>/dev/null | grep -c '^Battery.*Discharging') -gt 0 ]] ; then
+      echo "$(acpi | cut -f2 -d ',' | tr -cd '[:digit:]')" 
+    fi
+  }
+
+  function battery_time_remaining() {
     if [[ $(acpi 2&>/dev/null | grep -c '^Battery.*Discharging') -gt 0 ]] ; then
-    function battery_pct_remaining() { echo "$(acpi | cut -f2 -d ',' | tr -cd '[:digit:]')" }
-    function battery_time_remaining() { echo $(acpi | cut -f3 -d ',') }
+      echo $(acpi | cut -f3 -d ',')
+    fi
+  }
+
   function battery_pct_prompt() {
     b=$(battery_pct_remaining) 
+    if [[ $(acpi 2&>/dev/null | grep -c '^Battery.*Discharging') -gt 0 ]] ; then
       if [ $b -gt 50 ] ; then
         color='green'
       elif [ $b -gt 20 ] ; then
@@ -65,11 +75,8 @@ elif [[ $(uname) == "Linux"  ]] ; then
         color='red'
       fi
       echo "%{$fg[$color]%}[$(battery_pct_remaining)%%]%{$reset_color%}"
-    }
     else
-    error_msg='no battery'
-    function battery_pct_remaining() { echo $error_msg }
-    function battery_time_remaining() { echo $error_msg }
-    function battery_pct_prompt() { echo '' }
+      echo "∞"
     fi
+  }
 fi