File size: 2,771 Bytes
0070fce |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 |
import hashlib
import os.path
from modules import shared
import modules.cache
dump_cache = modules.cache.dump_cache
cache = modules.cache.cache
def calculate_sha256(filename: str) -> str:
hash_sha256 = hashlib.sha256()
blksize = 1024 * 1024
with open(filename, "rb") as f:
for chunk in iter(lambda: f.read(blksize), b""):
hash_sha256.update(chunk)
return hash_sha256.hexdigest()
def sha256_from_cache(filename, title, use_addnet_hash=False):
hashes = cache("hashes-addnet") if use_addnet_hash else cache("hashes")
if title not in hashes:
return None
cached_sha256 = hashes[title].get("sha256", None)
if cached_sha256 is None:
return None
try:
ondisk_mtime = os.path.getmtime(filename)
except FileNotFoundError:
return None
cached_mtime = hashes[title].get("mtime", -1)
if ondisk_mtime != cached_mtime:
return None
return cached_sha256
def sha256(filename, title, use_addnet_hash=False):
sha256_value = sha256_from_cache(filename, title, use_addnet_hash)
if sha256_value is not None:
return sha256_value
if shared.cmd_opts.no_hashing:
return None
print(f"Calculating sha256 for {filename}: ", end="")
if use_addnet_hash:
with open(filename, "rb") as file:
sha256_value = addnet_hash_safetensors(file)
else:
sha256_value = calculate_sha256(filename)
print(f"{sha256_value}")
hashes = cache("hashes-addnet") if use_addnet_hash else cache("hashes")
hashes[title] = {
"mtime": os.path.getmtime(filename),
"sha256": sha256_value,
}
dump_cache()
return sha256_value
def addnet_hash_safetensors(b: bytes) -> str:
"""
kohya-ss hash for safetensors from https://github.com/kohya-ss/sd-scripts/blob/main/library/train_util.py
"""
hash_sha256 = hashlib.sha256()
blksize = 1024 * 1024
b.seek(0)
header = b.read(8)
n = int.from_bytes(header, "little")
offset = n + 8
b.seek(offset)
for chunk in iter(lambda: b.read(blksize), b""):
hash_sha256.update(chunk)
return hash_sha256.hexdigest()
def partial_hash_from_cache(filename):
hashes = cache("partial-hashes")
if filename in hashes:
return hashes[filename]
try:
with open(filename, "rb") as file:
hash_sha256 = hashlib.sha256()
file.seek(0x100000)
hash_sha256.update(file.read(0x10000))
partial_hash = hash_sha256.hexdigest()[0:8]
hashes[filename] = partial_hash
return partial_hash
except Exception:
return "NOFILE"
|