#!/bin/bash
# Author: Jens Getreu


# sudo apt install pandoc 

# parse args

render () {
    #set -x
    InPath="$1"
    InFile="${InPath##*/}"
    InBase="${InFile%.*}"
    InDir="${InPath%/*}"
    if [ "$InDir" = "$InPath" ] ; then
        InDir="."
    fi

    OutPath="$2"
    OutFile="${OutPath##*/}"
    OutBase="${OutFile%.*}"
    OutDir="${OutPath%/*}"
    if [ "$OutDir" = "$OutPath" ] ; then
        OutDir="."
    fi


    # process

    ManFile="$OutBase.1"

    mkdir -p "$OutDir"

    pandoc -s -t man -o "$OutDir/$ManFile" "$InPath"

    gzip -k -f "$OutDir/$ManFile"
}


### Main
# usage: 
# render FILE [FILE]
# render report.md ./rendition/report.1

if [[ -n "${2/[ ]*\n/}" ]] ; then
        OutPath="$2"
else
        OutPath="${1%.*}.html" # $2 is empty
fi
render "$1" "$OutPath"