cutthecord/patches/customversion/addpatch.py

#!/bin/env python3
import sys
import os
import datetime
import socket

fname = sys.argv[1]

# Read in the file
with open(fname, 'r') as file:
    filedata = file.read()

customtext = ""

for arg in range(2, len(sys.argv)):
    customtext += " {},".format(sys.argv[arg])
customtext = customtext.strip(",")

timestamp = str(datetime.datetime.utcnow()).split('.')[0] + " UTC"

customtext += ", built on {}@{} at {}".format(os.getlogin(),
                                              socket.gethostname(),
                                              timestamp)

# Replace the target string
filedata = filedata.replace('with Cutthecord patches"',
                            'with Cutthecord patches{}"'.format(customtext))

# Write the file out again
with open(fname.replace(".patch", "-custom.patch"), 'w') as file:
    file.write(filedata)