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