2022-07-02 17:14:45 +02:00
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#!/bin/sh
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tmpfile=".$$.$1.md2html"
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2022-07-02 17:17:42 +02:00
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awk "$@" '
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2021-11-28 18:26:47 +01:00
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BEGIN {
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indent = 0
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prefix = "html/body/"
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print("<!DOCTYPE html>")
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level("html/head")
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2022-07-02 22:55:45 +02:00
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meta["lang"]="en"
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2022-07-02 17:14:45 +02:00
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toc=0
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2021-11-28 18:26:47 +01:00
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}
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function headers() {
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printf("%0" indent "s<meta charset=UTF-8>\n", "")
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if (meta["title"]) printf("%0" indent "s<title>%s</title>\n", "", escape(meta["title"]))
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if (meta["author"]) printf("%0" indent "s<meta name=author content=\"%s\">\n", "", escape(meta["author"]))
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if (stylesheet) printf("%0" indent "s<link href=\"%s\" rel=stylesheet type=text/css media=all>\n", "", stylesheet)
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if (javascript) printf("%0" indent "s<script src=\"/%s\"></script>\n", "", escape(javascript))
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}
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function oneliner(tag, str, args) {
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printf("%0" indent "s<%s>%s</%s>\n", "", tag args, inline(str), tag)
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}
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function level(new) {
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split(new, a, "/")
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split(old, b, "/")
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for (common = 0; common < 10; common++) {
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if (common >= length(a)) break
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if (common >= length(b)) break
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if (a[common] != b[common]) break
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}
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for (i = length(b); i >= common; --i) {
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if (b[i]) {
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if (b[i] == "head") headers()
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indent = indent - 2
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2022-04-08 21:48:16 +02:00
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if (b[i]=="pre") {
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printf("</%s>\n", b[i])
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} else {
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printf("%0" indent "s</%s>\n", "", b[i])
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}
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2021-11-28 18:26:47 +01:00
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}
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}
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for (i = common; i < length(a); i++) {
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if (a[i]) {
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2022-07-02 22:55:45 +02:00
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if (a[i]=="body") {
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printf("%0" indent "s<%s lang=%s>\n", "", a[i], meta["lang"])
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} else {
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printf("%0" indent "s<%s>\n", "", a[i])
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}
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2021-11-28 18:26:47 +01:00
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indent = indent + 2
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}
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}
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old = new
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}
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function escape(text) {
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gsub(/&/, "\\&", text)
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gsub(/</, "\\<", text)
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gsub(/>/, "\\>", text)
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2023-05-09 12:56:05 +02:00
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gsub(/"/, "\\"", text)
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2021-11-28 18:26:47 +01:00
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return text
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}
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2022-07-02 17:14:45 +02:00
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function inline(text) {
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2021-11-28 18:26:47 +01:00
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text = escape(text)
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text = gensub(/\*\*([^\*]*)\*\*/, "<strong>\\1</strong>", "g", text)
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text = gensub(/\*([^\*]*)\*/, "<em>\\1</em>", "g", text)
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text = gensub(/`([^`]*)`/, "<code>\\1</code>", "g", text)
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2022-04-07 18:05:26 +02:00
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text = gensub(/\[(.*)\]\((.*)\)/, "<a href=\"\\2\">\\1</a>", "g", text)
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2021-11-28 18:26:47 +01:00
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return text
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}
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/^---$/ {
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parse_meta = !parse_meta
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next
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}
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{
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if(parse_meta) {
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split($0, r, ": ")
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gsub(/(^"|"$)/, "", r[2])
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meta[r[1]]=r[2]
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next
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}
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}
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/^```/ {
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if (old == prefix "pre") {
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level(prefix)
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} else {
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level(prefix "pre")
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}
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next
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}
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{
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if (old == prefix "pre") {
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printf("%s\n", escape($0))
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next
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}
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}
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/^- / {
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level(prefix "ul")
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level(prefix "ul/li")
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gsub(/^- /, "", $0)
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printf("%0" indent "s%s\n", "", inline($0))
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next
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}
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/^\s*\* / {
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level(prefix "ul")
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level(prefix "ul/li")
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gsub(/^\s*\* /, "", $0)
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printf("%0" indent "s%s\n", "", inline($0))
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next
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}
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/^> / {
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level(prefix "quote")
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gsub(/^> /, "", $0)
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printf("%0" indent "s%s\n", "", inline($0))
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}
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/^ / {
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level(prefix "blockquote")
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printf("%0" indent "s%s\n", "", inline($0))
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}
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/^ / {
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if (old == prefix) level(prefix "p")
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printf("%0" indent "s%s\n", "", inline($0))
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next
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}
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2022-06-26 02:24:23 +02:00
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/^##* / {
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d=length($1)
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2021-11-28 18:26:47 +01:00
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gsub(/^#* /, "", $0)
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2022-06-26 02:24:23 +02:00
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if (d==1 && !meta["title"]) meta["title"] = $0
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2022-07-02 17:14:45 +02:00
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if (d!=1 && toc==0) {
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level(prefix "summary")
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level(prefix)
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toc=1
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}
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2022-06-26 02:24:23 +02:00
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id1=$0
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gsub(/[^a-zA-Z0-9]/, "", id1)
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hash[d]=id1
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id = ""
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for (i = 2; i <= d; i++) {
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id = id hash[i]
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}
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if (id != "") id = " id=\"" escape(id) "\""
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2021-11-28 18:26:47 +01:00
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level(prefix)
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2022-06-26 02:24:23 +02:00
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oneliner("h"d, $0, id)
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2021-11-28 18:26:47 +01:00
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next
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}
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/^$/ {
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if (old != "html/head") level(prefix)
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next
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}
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2022-04-07 18:34:39 +02:00
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/^!\[.*\]\(.*\)$/ {
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txt = $0
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filenam = $0
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gsub(/(^!\[|\].*$)/, "", txt)
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gsub(/(^!.*\(|\)$)/, "", filenam)
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2022-06-25 03:03:01 +02:00
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level(prefix "figure")
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2022-04-07 18:34:39 +02:00
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oneliner("img",""," src=\"" escape(filenam) "\" alt=\"" escape(txt) "\"")
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2022-06-25 03:03:01 +02:00
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oneliner("figcaption", txt, "")
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2022-04-07 18:34:39 +02:00
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next
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}
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2021-11-28 18:26:47 +01:00
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{
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level(prefix "p")
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printf("%0" indent "s%s\n", "", inline($0))
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next
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}
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2022-07-02 17:14:45 +02:00
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END {
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level("")
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}' > "$tmpfile"
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sed -n '/<summary>/!p;//q' "$tmpfile"
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awk '
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BEGIN {
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indent = 4
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level("summary")
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2022-07-02 22:55:45 +02:00
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lang="en"
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tocname["en"]="Table of contents"
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tocname["de"]="Inhaltsverzeichnis"
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2022-07-02 17:14:45 +02:00
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}
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function oneliner(tag, str, args) {
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printf("%0" indent "s<%s>%s</%s>\n", "", tag args, inline(str), tag)
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}
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function level(new) {
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split(new, a, "/")
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split(old, b, "/")
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for (common = 0; common < 10; common++) {
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if (common >= length(a)) break
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if (common >= length(b)) break
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if (a[common] != b[common]) break
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}
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for (i = length(b); i >= common; --i) {
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if (b[i]) {
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indent = indent - 2
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if (b[i]=="pre") {
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printf("</%s>\n", b[i])
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} else {
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printf("%0" indent "s</%s>\n", "", b[i])
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}
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}
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}
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for (i = common; i < length(a); i++) {
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if (a[i]) {
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printf("%0" indent "s<%s>\n", "", a[i])
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indent = indent + 2
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}
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}
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old = new
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}
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function escape(text) {
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gsub(/&/, "\\&", text)
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gsub(/</, "\\<", text)
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gsub(/>/, "\\>", text)
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2023-05-09 12:56:05 +02:00
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gsub(/"/, "\\"", text)
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2022-07-02 17:14:45 +02:00
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return text
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}
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function inline(text) {
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text = escape(text)
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text = gensub(/\*\*([^\*]*)\*\*/, "<strong>\\1</strong>", "g", text)
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text = gensub(/\*([^\*]*)\*/, "<em>\\1</em>", "g", text)
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text = gensub(/`([^`]*)`/, "<code>\\1</code>", "g", text)
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2023-05-09 12:56:05 +02:00
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text = gensub(/\[(.*)\]\((.*)\)/, "<a href=\"\\2\">\\1</a>", "g", text)
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2022-07-02 17:14:45 +02:00
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return text
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}
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2022-07-02 22:55:45 +02:00
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/<body lang=/ {
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lang=$0
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2023-05-09 12:56:05 +02:00
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gsub(/^.*lang="*/,"",lang)
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2022-07-02 22:55:45 +02:00
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gsub(/[^a-z].*$/,"",lang)
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level("summary")
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oneliner("h2", tocname[lang])
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}
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2022-07-02 17:14:45 +02:00
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/<h[2-6] / {
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id=$0
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2023-05-09 12:56:05 +02:00
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gsub(/^.*id="/,"",id)
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gsub(/">.*$/,"",id)
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2022-07-02 17:14:45 +02:00
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d=$1
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gsub(/^<h/, "", d)
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gsub(/ *<[^>]*>/, "", $0)
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trg="summary/ul"
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for(i=2;i<d;i++) trg=trg "/li/ul"
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level(trg)
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level(trg "/li")
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oneliner("a", $0, " href=\"#" id "\"")
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}
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2021-11-28 18:26:47 +01:00
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END {
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level("")
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}
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2022-07-02 17:14:45 +02:00
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' < "$tmpfile"
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sed -e '1,/<\/summary>/ d' "$tmpfile"
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rm "$tmpfile"
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