2021-11-28 18:26:47 +01:00
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#!/usr/bin/awk -f
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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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}
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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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printf("%0" indent "s</%s>\n", "", b[i])
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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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gsub(/\"/, "\\"", text)
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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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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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/^# / {
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gsub(/^#* /, "", $0)
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if (!meta["title"]) meta["title"] = $0
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level(prefix)
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oneliner("h1", $0)
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next
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}
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/^## / {
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gsub(/^#* /, "", $0)
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level(prefix)
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oneliner("h2", $0)
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next
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}
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/^### / {
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gsub(/^#* /, "", $0)
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level(prefix)
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oneliner("h3", $0)
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next
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}
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/^$/ {
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if (old != "html/head") level(prefix)
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next
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}
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{
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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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END {
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level("")
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}
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