from sys import argv
import os
def copy_file(donor, recipient):
    with open(donor, "r") as fp_in:
        with open(recipient, "w") as fp_out:
            fp_out.write(fp_in.read())
## murphology:  donor might not exist
## undesired clobberage of the recipient
if len(argv) < 3:
    print("Usage:  python copy.py donor recipient")
    quit()
donor = argv[1]
recipient = argv[2]
if not os.path.exists(donor):
    print(f"File {donor} does not exist.")
    print("Bailing.....")
    quit()
if os.path.exists(recipient):
    yn = input(f"Do you want to clobber {recipient}?  y/n  ")
    if yn[0] == "n" or yn[0] == "N":
        print(f"File {recipient} not clobbered")
        print("quitting")
        quit()
copy_file(donor, recipient)