82 lines
2.1 KiB
Python
82 lines
2.1 KiB
Python
import hashlib
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import os.path
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from modules import shared
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import modules.cache
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dump_cache = modules.cache.dump_cache
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cache = modules.cache.cache
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def calculate_sha256(filename):
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hash_sha256 = hashlib.sha256()
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blksize = 1024 * 1024
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with open(filename, "rb") as f:
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for chunk in iter(lambda: f.read(blksize), b""):
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hash_sha256.update(chunk)
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return hash_sha256.hexdigest()
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def sha256_from_cache(filename, title, use_addnet_hash=False):
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hashes = cache("hashes-addnet") if use_addnet_hash else cache("hashes")
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ondisk_mtime = os.path.getmtime(filename)
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if title not in hashes:
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return None
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cached_sha256 = hashes[title].get("sha256", None)
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cached_mtime = hashes[title].get("mtime", 0)
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if ondisk_mtime > cached_mtime or cached_sha256 is None:
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return None
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return cached_sha256
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def sha256(filename, title, use_addnet_hash=False):
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hashes = cache("hashes-addnet") if use_addnet_hash else cache("hashes")
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sha256_value = sha256_from_cache(filename, title, use_addnet_hash)
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if sha256_value is not None:
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return sha256_value
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if shared.cmd_opts.no_hashing:
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return None
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print(f"Calculating sha256 for {filename}: ", end='')
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if use_addnet_hash:
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with open(filename, "rb") as file:
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sha256_value = addnet_hash_safetensors(file)
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else:
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sha256_value = calculate_sha256(filename)
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print(f"{sha256_value}")
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hashes[title] = {
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"mtime": os.path.getmtime(filename),
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"sha256": sha256_value,
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}
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dump_cache()
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return sha256_value
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def addnet_hash_safetensors(b):
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"""kohya-ss hash for safetensors from https://ghproxy.com/https://github.com/kohya-ss/sd-scripts/blob/main/library/train_util.py"""
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hash_sha256 = hashlib.sha256()
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blksize = 1024 * 1024
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b.seek(0)
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header = b.read(8)
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n = int.from_bytes(header, "little")
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offset = n + 8
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b.seek(offset)
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for chunk in iter(lambda: b.read(blksize), b""):
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hash_sha256.update(chunk)
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return hash_sha256.hexdigest()
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