md2md.rb

# Convert all files in dir from Ghost-compatible markdown to Hugo-compatible markdown
# (changes footnotes and headings)
#
# Usage: ruby md2md.rb /path/to/posts

# #Heading --> # Heading
def headings(str)
	str.gsub(/(#+)(?=[^ #])/i,'\1 ')
end

# this[^n] is[^n] footnoted[^n] --> this[^m] is[^n] footnoted[^o]
def footnote_refs(str)
	thing = ('m'..'z').to_a.cycle.each
	while str =~ /\[\^n\](?=[^:])/
		str.sub!(/\[\^n\](?=[^:])/,"[^#{thing.next}]")
	end
	str
end

# [^n]: Blah blah\n[^n]: Further blah\n[^n]: More blah --> [^m]: Blah blah\n[^n]: Further blah\n[^o]: More blah
def footnotes(str)
	thing = ('m'..'z').to_a.cycle.each
	while str =~ /\[\^n\]:/
		str.sub!(/\[\^n\]:/,"[^#{thing.next}]:")
	end
	str
end

# Do this to every file.md in-place (living dangerously)
Dir.glob("#{ARGV[0]}/**/*.md") do |file|
	f = open(file).read
	f = headings(f)
	f = footnote_refs(f)
	f = footnotes(f)
	File.open(file, 'w') do |fl|
		fl.write f
	end
end