#!/bin/sh

## module to read meta in header of md file
## usage: 
##      md-header [md_filepath] [header_name]

[ "$#" -ne 2 ] && { echo "Incorrect usage"; exit 1; }

propname=""
case "$2" in
    name) propname=name;;
    published) propname=published;;
    tags) propname=tags;;
    *) exit 1;;
esac

sed -nE "s/^-- ${propname}: (.*)$/\1/p" "$1"