Show progress spinner based on chatty commands

progresstinate.sh

# Usage:
# progresstinate "Building $SERVER_WAR" \
#    mvn clean install
progresstinate() {
        msg="$1"; shift; args="$@"; symbol="-"
        printf "$msg [$symbol]"
        "$@" | while read line; do
                symbol="$(echo "$symbol" | tr -- '-/|\\' '/|\\-')"
                printf "\b\b$symbol]"
        done
        printf "\b\bDONE]\n"
}