#!/bin/bash
function helpexit() {
    echo "Print out TOC of a markdown document"
    echo "Give filename(s) as the argument"
    echo " -n  to number TOC elements instead of bullet"
    exit
}
[[ -z "$1" ]] && helpexit
[[ "$1" = "-h" ]] && helpexit
[[ "$1" = "-n" ]] && {
    NUMBER=1
    shift
}

[[ "$NUMBER" -eq 1 ]] && {
    grep ^# "$@" | sed -e 's,^#,1.,' -e ':loop' -e 's,1.#,    1.,' -e 't loop' | pandoc -t markdown_strict
} || {
    grep ^# "$@" | sed -e 's,^#,*,' -e ':loop' -e 's,*#,    *,' -e 't loop'
}