Quick conversion to Markdown for Curio list text output (Copy As Plain Text)

curio2md.rb

#!/usr/bin/ruby
# encoding: utf-8
# Quick conversion to Markdown for Curio list text output (Copy As Plain Text)
# Separates notes into subparagraphs, builds headers and lists based on max_headers setting
# You can insert a line at the top with "max headers: 5" to override the default setting for that text
# Usage:
# pbpaste|curio2md.rb > markdown_file.md
# Also works as a system service
max_headers = 3

input = STDIN.read
o = ""

input.split("\n").delete_if {|line| line =~ /^\s*$/ }.each { |line|
	if line.strip =~ /^max(?:[-_ ]headers?)?: (\d)$/i
		max_headers = $1.to_i
		next
	end
	numeric = false
	addnewline = false
	line.gsub!(/ {4}/,"\t") if line =~ /^ {4,}\w/
	if line =~ /(\t*)(?:\d+\.|\(\d+\)|i+[\)\.])\t(\w.*$)/
		line = "#{$1}#{$2}"
		numeric = true
	elsif line =~ /(\t*)\S{1,3}[\)\.]?\t(\w.*$)/i
		line = "#{$1}#{$2}"
	end
	matches = line.scan(/\t/).length
	if matches < max_headers
		prefix = "\n"
		(matches + 1).times { prefix += "#" }
		prefix += " "
		addnewline = true
	else
		prefix = ""
		(matches-max_headers).times { prefix += "\t" }
		prefix += numeric ? "1. " : "* "
	end

	if line =~ /^(.+?) - (.+)/
		note = $2
		line = $1
	else
		note = false
	end
	o += prefix + line.strip + "\n"
	if note
		indent = ""
		(matches-max_headers+1).times do
			indent += "\t"
		end
		o += "\n#{indent}#{note.strip}\n"
	end
	o += "\n" if addnewline
	addnewline = false
}
print o