109 lines
3.1 KiB
Awk
109 lines
3.1 KiB
Awk
function strip_markdown(s) {
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gsub(/<[^>]+>/, "", s)
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gsub(/[*_`~]/, "", s)
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gsub(/[\[\]]/, "", s)
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gsub(/\([^\)]*\)/, "", s)
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s = tolower(s)
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gsub(/[^a-z0-9 -]/, "", s)
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gsub(/^[[:space:]]+|[[:space:]]+$/, "", s)
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gsub(/[[:space:]]+/, "-", s)
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gsub(/-{2,}/, "-", s)
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gsub(/^-+|-+$/, "", s)
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if (length(s) > 80) s = substr(s, 1, 80)
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gsub(/-+$/, "", s)
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return s
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}
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function unique_id(raw_id, candidate) {
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candidate = raw_id
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if (candidate == "") candidate = "section"
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if (!(candidate in seen_ids)) {
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seen_ids[candidate] = 1
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return candidate
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}
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seen_ids[candidate]++
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return candidate "-" seen_ids[candidate]
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}
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function has_inline_link(line) {
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return (index(line, "<a ") > 0 || index(line, "<a\t") > 0)
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}
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function print_heading(tag, line, id) {
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id = unique_id(strip_markdown(line))
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if (enable_header_links == "true") {
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if (has_inline_link(line)) {
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print "<" tag " id=\"" id "\">" line " <a href=\"#" id "\" class=\"header-anchor\" aria-label=\"Link to this section\">#</a></" tag ">"
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} else {
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print "<" tag " id=\"" id "\"><a href=\"#" id "\" class=\"header-link\">" line "<span class=\"header-anchor\" aria-hidden=\"true\">#</span></a></" tag ">"
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}
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} else {
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print "<" tag " id=\"" id "\">" line "</" tag ">"
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}
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}
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function print_header(line) {
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tag = ""
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if (line ~ /^# /) { tag = "h1"; sub(/^# /, "", line) }
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else if (line ~ /^## /) { tag = "h2"; sub(/^## /, "", line) }
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else if (line ~ /^### /) { tag = "h3"; sub(/^### /, "", line) }
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else if (line ~ /^#### /) { tag = "h4"; sub(/^#### /, "", line) }
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else if (line ~ /^##### /) { tag = "h5"; sub(/^##### /, "", line) }
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else if (line ~ /^###### /) { tag = "h6"; sub(/^###### /, "", line) }
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if (tag != "") {
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print_heading(tag, line)
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} else {
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print line
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}
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}
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BEGIN {
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has_prev = 0
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in_pre = 0
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}
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{
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if ($0 ~ /^<pre><code/) {
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in_pre = 1
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if (has_prev && prev != "") { print_header(prev); has_prev = 0 }
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print
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next
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}
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if (in_pre) {
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if ($0 ~ /<\/code><\/pre>/) in_pre = 0
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print
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next
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}
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if ($0 ~ /^=+$/) {
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if (has_prev && prev != "" && prev !~ /^<[a-z]/) {
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print_heading("h1", prev)
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has_prev = 0
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} else {
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if (has_prev) print_header(prev)
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print $0
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has_prev = 0
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}
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} else if ($0 ~ /^-+$/) {
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if (has_prev && prev != "" && prev !~ /^<[a-z]/) {
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print_heading("h2", prev)
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has_prev = 0
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} else {
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if (has_prev) print_header(prev)
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if (length($0) >= 3) print "<hr />"
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else print $0
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has_prev = 0
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}
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} else if ($0 ~ /^[*_]+$/ && length($0) >= 3) {
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if (has_prev) print_header(prev)
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print "<hr />"
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has_prev = 0
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} else {
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if (has_prev) {
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print_header(prev)
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}
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prev = $0
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has_prev = 1
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}
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}
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END {
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if (has_prev) {
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print_header(prev)
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}
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}
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