Bash: Helper Functions

helpers.sh

export MARKPATH="$HOME/.marks"

function jump { 
    cd -P "$MARKPATH/$1" 2>/dev/null || echo "No such mark: $1"
}
function mark { 
    mkdir -p "$MARKPATH"; 
    ln -s "$(pwd)" "$MARKPATH/$1"
}
function unmark { 
    rm -i "$MARKPATH/$1" 
}
function marks {
    ls -l "$MARKPATH" | \
      sed 's/  / /g' | \
      cut -d' ' -f9- | \
      sed 's/ -/\t-/g' && echo
}