llama

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#!/usr/bin/env python3
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import logging
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import os
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import hashlib
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logger = logging.getLogger("verify-checksum-models")
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def sha256sum(file):
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    block_size = 16 * 1024 * 1024  # 16 MB block size
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    b = bytearray(block_size)
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    file_hash = hashlib.sha256()
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    mv = memoryview(b)
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    with open(file, 'rb', buffering=0) as f:
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        while True:
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            n = f.readinto(mv)
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            if not n:
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                break
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            file_hash.update(mv[:n])
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    return file_hash.hexdigest()
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# Define the path to the llama directory (parent folder of script directory)
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llama_path = os.path.abspath(os.path.join(os.path.dirname(__file__), os.pardir))
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# Define the file with the list of hashes and filenames
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hash_list_file = os.path.join(llama_path, "SHA256SUMS")
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# Check if the hash list file exists
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if not os.path.exists(hash_list_file):
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    logger.error(f"Hash list file not found: {hash_list_file}")
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    exit(1)
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# Read the hash file content and split it into an array of lines
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with open(hash_list_file, "r") as f:
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    hash_list = f.read().splitlines()
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# Create an array to store the results
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results = []
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# Loop over each line in the hash list
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for line in hash_list:
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    # Split the line into hash and filename
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    hash_value, filename = line.split("  ")
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    # Get the full path of the file by joining the llama path and the filename
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    file_path = os.path.join(llama_path, filename)
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    # Informing user of the progress of the integrity check
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    logger.info(f"Verifying the checksum of {file_path}")
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    # Check if the file exists
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    if os.path.exists(file_path):
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        # Calculate the SHA256 checksum of the file using hashlib
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        file_hash = sha256sum(file_path)
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        # Compare the file hash with the expected hash
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        if file_hash == hash_value:
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            valid_checksum = "V"
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            file_missing = ""
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        else:
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            valid_checksum = ""
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            file_missing = ""
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    else:
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        valid_checksum = ""
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        file_missing = "X"
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    # Add the results to the array
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    results.append({
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        "filename": filename,
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        "valid checksum": valid_checksum,
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        "file missing": file_missing
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    })
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# Print column headers for results table
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print("filename".ljust(40) + "valid checksum".center(20) + "file missing".center(20)) # noqa: NP100
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print("-" * 80) # noqa: NP100
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# Output the results as a table
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for r in results:
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    print(f"{r['filename']:40} {r['valid checksum']:^20} {r['file missing']:^20}") # noqa: NP100
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