Add EOF to all files

add_eof.py

#!/usr/bin/env python3
import os

LF_BYTES = b'\n'
LF_BYTE = b'\n'[0]

def get_filetypes():
    types = []
    for line in open('.gitattributes').readlines():
        line = line.split()
        if len(line) > 1 and line[1] == 'mctext':
            types.append(line[0])
    return types


filetypes = sorted(['.' + x.split('.')[-1] for x in get_filetypes()])
exceptions = ('bad_cert.txt',)

for root, dirs, files in os.walk('.'):
    for file in files:
        if os.path.splitext(file)[1] in filetypes and file not in exceptions:
            path = os.path.join(root, file)
            text = open(path, 'rb').read()
            if len(text) == 0:
                continue

            changed = False
            while text[-1] == LF_BYTE and text[-2] == LF_BYTE:
                # if the last two bytes are '\n' remove one of them
                text = text[:-1]
                changed = True
            if text[-1] != LF_BYTE:
                # if the last byte is not '\n' add one
                text += LF_BYTES
                changed = True

            if changed:
                open(path, 'wb').write(text)