checkbooking.sh

#!/bin/bash

BANK_BALANCE="bank-balance"
MY_BALANCE="my-balance"
OUTSTANDING="outstanding"


function main(){
    local bank_bal=$(cat $BANK_BALANCE)
    echo "bank balance = $bank_bal"

    local my_bal=$(cat $MY_BALANCE)
    echo "my balance = $my_bal"

    local outstanding=$(_getsum $OUTSTANDING)
    echo "outstanding = $outstanding"

    echo -n "bank balance + outstanding = "
    _dec_calc "$bank_bal + $outstanding"

    local my_less_outstanding=$(_dec_calc "$my_bal - $outstanding")

    check_my_balance $bank_bal $my_less_outstanding
    return $?
}


function _getsum(){
    ret=0.00
    for amt in $(cat $1)
    do
        ret=$(_dec_calc "$ret + $amt")
    done

    echo $ret
}


function check_my_balance(){
    if [[ "$1" = "$2" ]]
    then
        echo "balanced!"
        return 0

    else
        echo "expected = $1"
        echo "actual = $2"
        echo "difference = $(_dec_calc "$1 - $2")"
        return 1
    fi
}


function _dec_calc(){
    echo "scale=2; $*" | bc
}


main $*
exit $?


# vim:filetype=sh:fileencoding=utf-8

Makefile

# vim:fileencoding=utf-8

CKBOOK := ./checkbooking
DATE := date

DEPS := bank-balance my-balance outstanding


last-done: $(DEPS)
	$(CKBOOK) && $(DATE) > $@