import hashlib

import os

import argparse

def hash_directory(path, verbose=False):

"""Hashes the contents of a directory."""

hasher = hashlib.sha256()

try:

for item in os.listdir(path):

item_path = os.path.join(path, item)

if os.path.isfile(item_path):

with open(item_path, 'rb') as f:

while True:

chunk = f.read(4096) # Read in chunks

if not chunk:

break

hasher.update(chunk)

elif os.path.isdir(item_path):

if verbose:

print(f"Hashing subdirectory: {item_path}")

hasher.update(os.path.basename(item_path).encode('utf-8')) # Hash directory name

except OSError as e:

print(f"Error accessing {path}: {e}")

return None

return hasher.hexdigest()

def main():

"""Parses arguments and hashes the specified directory."""

parser = argparse.ArgumentParser(description='Hash a directory.')

parser.add_argument('directory', help='The directory to hash.')

parser.add_argument('--dry-run', action='store_true', help='Perform a dry run (print hashes without actual computation).')

args = parser.parse_args()

if not os.path.isdir(args.directory):

print(f"Error: {args.directory} is not a directory.")

return

if args.dry_run:

print("Dry run mode enabled. Printing hashes without computation.")

hashes = {}

for item in os.listdir(args.directory):

item_path = os.path.join(args.directory, item)

if os.path.isfile(item_path):

hashes[item] = hash_directory(item_path, verbose=True)

elif os.path.isdir(item_path):

hashes[item] = hash_directory(item_path, verbose=True)

print(hashes)

return

hash_value = hash_directory(args.directory)

if hash_value:

print(f"Directory hash: {hash_value}")

if __name__ == "__main__":

main()