wiki2html.sh

# This is heavily based in the code here: 
# https://gist.github.com/enpassant/0496e3db19e32e110edca03647c36541
# Special thank you to the user enpassant for starting it https://github.com/enpassant

#!/bin/bash

SYNTAX="$2"
EXTENSION="$3"
OUTPUTDIR="$4"
INPUT="$5"

# Added ones
TEMPLATE_PATH="$7"
TEMPLATE_DEFAULT="$8"
TEMPLATE_EXT="$9"
ROOT_PATH="${10}"

[[ "$ROOT_PATH" = "-" ]] && ROOT_PATH=''


FILE=$(basename "$INPUT")
FILENAME=$(basename "$INPUT" ."$EXTENSION")
FILEPATH=${INPUT%$FILE}
OUTDIR=${OUTPUTDIR%$FILEPATH*}
OUTPUT="$OUTDIR"/$FILENAME
CSSFILENAME=$(basename "$6")
FULL_TEMPLATE="$TEMPLATE_PATH/$TEMPLATE_DEFAULT$TEMPLATE_EXT"

HAS_MATH=$(grep -o "\$\$.\+\$\$" "$INPUT")
if [ -n "$HAS_MATH" ]; then
    MATH="--mathjax=https://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS-MML_HTMLorMML"
else
    MATH=""
fi

# >&2 echo "MATH: $MATH"

sed -r 's/(\[.+\])\(([^)]+)\)/\1(\2.html)/g' <"$INPUT" | pandoc $MATH --template="$FULL_TEMPLATE" -f "$SYNTAX" -t html -c "$CSSFILENAME" -M root_path:"$ROOT_PATH" | sed -r 's/<li>(.*)\[ \]/<li class="todo done0">\1/g; s/<li>(.*)\[X\]/<li class="todo done4">\1/g' > /tmp/crap.html

# With this you can have ![pic of sharks](file:../sharks.jpg) in your markdown file and it removes "file" 
# and the unnecesary dot html that the previous command added to the image. 
sed 's/file://g' < /tmp/crap.html | sed 's/jpg.html/jpg/g' > "$OUTPUT.html"

@rattletat Thanks! It works :)

There are two issues I have now. First is that it warns me about empty title. And second, how to make a link to my index.html page while I have folders hence it needs to be relative, without modifying each markdown file.