blog/content/posts/markdown-translator.md
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Markdown

---
title: "Markdown Transpiler Thingy"
date: 2020-07-21
draft: false
---
# Markdown to HTML
A while back I made [gensite](https://gitlab.com/shockrah/site-generator) a static site generator that was built with pandoc users in mind.
Along with the main script I packaged another script _translate.sh_ which is a (I think) full markdown to html translator.
It uses mostly coreutil things like perl, echo, sed, and grep so it's pretty portable to most systems. Oh and it's built with Bash; though I'm probably going to updated it to run with Dash, a very strict POSIX shell to make it even more compatible.
Oh yea did I mention its only 62 lines of actual code?
Here's the full script in case you want it, or maybe want to add some new feature/syntax or whatevs.
[Repo Link](https://gitlab.com/shockrah/site-generator)
```sh
#!/bin/bash
# Why? becausee a simple markdown to html converter is required for those that
# don't want to install pandoc that don't have it already
IFS=$'\n'
code=0
ul=0
paragraph() {
# Replace ![](/file/path.png) with proper img tag links
[ -z $1 ] && echo ''
[ 1 = $code ] && echo $1 || \
echo '<p>'$1'</p>' | sed -E 's/`(.*)`/<code>\1<\/code>/g;s/\!\[(.*)\]\((.*)\)/<img src="\2" alt="\1">/g;s/\[(.*)\]\((.*)\)/<a href="\2">\1<\/a>/g'
}
convert_links() {
sed -E 's/\[(.*)\]\((.*)\)/<a href="\2">\1<\/a>/g' < /dev/stdin
}
header() {
depth=$(echo $1 | grep '^##*' -o | tr -d '\n' | wc -m)
line=${1:$depth}
echo "<h$depth>$line</h$depth>" | convert_links
}
blockquote() {
# remove starting > symbols before doing anything
echo "<blockquote>${1:1}</blockquote>" | convert_links
}
fluff_trim() {
perl -0777 -pe 's/<\/p>\n<p>//g;s/<p><\/p>//g' < /dev/stdin
}
code_chunk() {
if [ 0 = $code ];then
code=1
echo '<pre><code>'
else
code=0
echo '</pre></code>'
fi
}
set_ul() {
if [ 1 = $ul ];then
ul=2
fi
}
unordered_list() {
case $ul in
0)echo "<ul><li>${1:1}</li>";ul=1;;
1)echo "<li>${1:1}</li>";ul=1;;
2)echo "<li>${1:1}</li></ul>";ul=0;;
esac
}
if [ -z $1 ];then
echo Usage: $0 file.md
exit 0
fi
while read line;do
case $line in
\#*) set_ul; header $line;;
\>*) set_ul; blockquote $line;;
\`\`\`) set_ul; code_chunk;;
\**) unordered_list $line;;
# TODO: ordered_lists
*) set_ul; paragraph "$line";;
esac
done < "$1" | fluff_trim | grep -v '^$'
```