Add script to show battery status.

Signed-off-by: Jacob Kiers <jacob@jacobkiers.net>

bin/battery

@@ -0,0 +1,122 @@
+#!/bin/sh
+
+HEART_FULL=♥
+HEART_EMPTY=♡
+[ -z "$NUM_HEARTS" ] &&
+    NUM_HEARTS=5
+
+cutinate()
+{
+    perc=$1
+    inc=$(( 100 / $NUM_HEARTS))
+
+
+    for i in `seq $NUM_HEARTS`; do
+        if [ $perc -lt 100 ]; then
+            echo $HEART_EMPTY
+        else
+            echo $HEART_FULL
+        fi
+        perc=$(( $perc + $inc ))
+    done
+}
+
+linux_get_bat ()
+{
+    bf=$(cat $BAT_FULL)
+    bn=$(cat $BAT_NOW)
+    echo $(( 100 * $bn / $bf ))
+}
+
+freebsd_get_bat ()
+{
+    sysctl -n hw.acpi.battery.life
+}
+
+# Do with grep and awk unless too hard
+
+# TODO Identify which machine we're on from teh script.
+
+battery_status()
+{
+case $(uname -s) in
+    "Linux")
+        BATPATH=${BATPATH:-/sys/class/power_supply/BAT0}
+        STATUS=$BATPATH/status
+        [ "$1" = `cat $STATUS` ] || [ "$1" = "" ] || return 0
+        if [ -f "$BATPATH/energy_full" ]; then
+            naming="energy"
+        elif [ -f "$BATPATH/charge_full" ]; then
+            naming="charge"
+        elif [ -f "$BATPATH/capacity" ]; then
+            cat "$BATPATH/capacity"
+            return 0
+        fi
+        BAT_FULL=$BATPATH/${naming}_full
+        BAT_NOW=$BATPATH/${naming}_now
+        linux_get_bat
+        ;;
+    "FreeBSD")
+        STATUS=`sysctl -n hw.acpi.battery.state`
+        case $1 in
+            "Discharging")
+                if [ $STATUS -eq 1 ]; then
+                    freebsd_get_bat
+                fi
+                ;;
+            "Charging")
+                if [ $STATUS -eq 2 ]; then
+                    freebsd_get_bat
+                fi
+                ;;
+            "")
+                freebsd_get_bat
+                ;;
+        esac
+        ;;
+    "Darwin")
+        case $1 in
+            "Discharging")
+                ext="No";;
+            "Charging")
+                ext="Yes";;
+        esac
+
+        ioreg -c AppleSmartBattery -w0 | \
+        grep -o '"[^"]*" = [^ ]*' | \
+        sed -e 's/= //g' -e 's/"//g' | \
+        sort | \
+        while read key value; do
+            case $key in
+                "MaxCapacity")
+                    export maxcap=$value;;
+                "CurrentCapacity")
+                    export curcap=$value;;
+                "ExternalConnected")
+                    if [ -n "$ext" ] && [ "$ext" != "$value" ]; then
+                        exit
+                    fi
+                ;;
+                "FullyCharged")
+                    if [ "$value" = "Yes" ]; then
+                        exit
+                    fi
+                ;;
+            esac
+            if [[ -n "$maxcap" && -n $curcap ]]; then
+                echo $(( 100 * $curcap / $maxcap ))
+                break
+            fi
+        done
+esac
+}
+
+BATTERY_STATUS=`battery_status $1`
+[ -z "$BATTERY_STATUS" ] && exit
+
+if [ -n "$CUTE_BATTERY_INDICATOR" ]; then
+    cutinate $BATTERY_STATUS
+else
+    echo ${BATTERY_STATUS}%
+fi
+