mirror of
https://github.com/AUTOMATIC1111/stable-diffusion-webui.git
synced 2024-11-21 03:11:40 +08:00
82 lines
2.1 KiB
Python
82 lines
2.1 KiB
Python
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):
|
|
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")
|
|
ondisk_mtime = os.path.getmtime(filename)
|
|
|
|
if title not in hashes:
|
|
return None
|
|
|
|
cached_sha256 = hashes[title].get("sha256", None)
|
|
cached_mtime = hashes[title].get("mtime", 0)
|
|
|
|
if ondisk_mtime > cached_mtime or cached_sha256 is None:
|
|
return None
|
|
|
|
return cached_sha256
|
|
|
|
|
|
def sha256(filename, title, use_addnet_hash=False):
|
|
hashes = cache("hashes-addnet") if use_addnet_hash else cache("hashes")
|
|
|
|
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[title] = {
|
|
"mtime": os.path.getmtime(filename),
|
|
"sha256": sha256_value,
|
|
}
|
|
|
|
dump_cache()
|
|
|
|
return sha256_value
|
|
|
|
|
|
def addnet_hash_safetensors(b):
|
|
"""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()
|
|
|