30 lines
656 B
Python
30 lines
656 B
Python
#!/usr/bin/env python3
|
|
import sys
|
|
import os
|
|
import hashlib
|
|
|
|
|
|
def hash_file(fname):
|
|
if not os.path.exists(fname):
|
|
return b""
|
|
hasher = hashlib.md5()
|
|
with open(fname, "rb") as f:
|
|
hasher.update(f.read())
|
|
return hasher.digest()
|
|
|
|
|
|
old_digest = hash_file(sys.argv[3])
|
|
|
|
with open(sys.argv[3] + ".tmp", "wb") as f:
|
|
f.write(open(sys.argv[1], "rb").read())
|
|
if os.path.exists(sys.argv[2]):
|
|
f.write(open(sys.argv[2], "rb").read())
|
|
|
|
new_digest = hash_file(sys.argv[3] + ".tmp")
|
|
|
|
if new_digest != old_digest:
|
|
print("Replacing")
|
|
os.rename(sys.argv[3] + ".tmp", sys.argv[3])
|
|
else:
|
|
os.remove(sys.argv[3] + ".tmp")
|