Add header number to markdown file.

Markdown_AddHeaderNumber.awk

# Markdown_AddHeaderNumber
#  input: Markdown.md
#  output: Markdown.md added number on headers
#
#  header format
#
#  ```Markdown
#   # 1. header
#   ## 1.1. header
#  ```

BEGIN {
	h1 = 0
	h2 = 0
	h3 = 0
	h4 = 0
	h5 = 0 
	h6 = 0
	h7 = 0
	number = /[0-9\.]+/
}
$1 == "#" && $2 ~ /[0-9.]+/ {
	$2 = ++h1 "."
	print
	h2 = 0; h3 = 0; h4 = 0; h5 = 0; h6 = 0; h7 = 0;
}
$1 == "##" && $2 ~ /[0-9.]+/ {
	$2 = h1 "." ++h2
	print
	h3 = 0; h4 = 0; h5 = 0; h6 = 0; h7 = 0;
}
$1 == "###" && $2 ~ /[0-9.]+/ {
	$2 = h1 "." h2 "." ++h3
	print
	h4 = 0; h5 = 0; h6 = 0; h7 = 0;
}
$1 == "####" && $2 ~ /[0-9.]+/ {
	$2 = h1 "." h2 "." h3 "." ++h4
	print
	h5 = 0; h6 = 0; h7 = 0;
}
$1 == "#####" && $2 ~ /[0-9.]+/ {
	$2 = h1 "." h2 "." h3 "." h4 "." ++h5
	print
	h6 = 0; h7 = 0;
}
$1 == "######" && $2 ~ /[0-9.]+/ {
	$2 = h1 "." h2 "." h3 "." h4 "." h5 "." ++h6
	print
	h7 = 0;
}
$1 == "#######" && $2 ~ /[0-9.]+/ {
	$2 = h1 "." h2 "." h3 "." h4 "." h5 "." h6 "." ++h7
	print
}
$1 ~ /[^#]+/
$0 == ""