Adds code files into markdown

mergecode.py

#!/usr/bin/env python3

# coding=utf-8

import sys
import re
import os
import shutil

if len(sys.argv) < 2:
    print("Looks for '<!-- include code somefile.ext -->' and adds somefile.ext")
    print("to the markdown file as a fenced code block with the extension as the syntax.")
    print("Replaces an existing block code as long as it's right below the include line.")
    print("")
    print("usage: %s filename" % sys.argv[0])
    sys.exit(1)

fn = sys.argv[1]

with open(fn) as filein:
    content = filein.readlines()

incodeblock = False
codename = None
output = ""
for l in content:
    if not codename:
        m = re.match("^<!--\s+include code (.*)\s+-->$", l)
        if m:
            codename = m.group(1)
            output += l
            newcontent = open(codename).read()
            _, fileExtension = os.path.splitext(codename)

            output += "```%s\n%s\n```\n" % (fileExtension[1:], newcontent)
        else:
            output += l

    else:
        if not incodeblock:
            # ficheiro definido mas bloco de código ainda não detectado
            if l.startswith("```"):
                incodeblock = True

        else:
            if l.startswith("```"):
                incodeblock = False
                codename = None

shutil.copyfile(fn, fn+".bak")
open(fn, "w").write(output)