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fix packer tuple docstring order and add packer="lz4hc" #378

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fix packer tuple docstring order and add packer="lz4hc" #378

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786102c
fix(BundleFile): correct packer tuple docstring and add lz4hc preset
com55 Aug 5, 2026
1a8dcd0
docs(Environment): clarify pack options depend on file type
com55 Aug 5, 2026
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2 changes: 1 addition & 1 deletion UnityPy/environment.py
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Original file line number Diff line number Diff line change
Expand Up @@ -176,7 +176,7 @@ def load_zip_file(self, value):
def save(self, pack="none", out_path="output"):
"""Saves all changed assets.
Mark assets as changed using `.mark_changed()`.
pack = "none" (default) or "lz4"
pack = "none" (default), "lz4", "lz4hc", "lzma", or "original"
"""
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for fname, fitem in self.files.items():
if getattr(fitem, "is_changed", False):
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9 changes: 7 additions & 2 deletions UnityPy/files/BundleFile.py
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Original file line number Diff line number Diff line change
Expand Up @@ -191,10 +191,12 @@ def save(self, packer=None):

packer:
can be either one of the following strings
or tuple consisting of (block_info_flag, data_flag)
or tuple consisting of (data_flag, block_info_flag)
allowed strings:
none - no compression, default, safest bet
lz4 - lz4 compression
lz4hc - lz4hc compression
lzma - lzma compression
original - uses the original flags
"""
# file_header
Expand Down Expand Up @@ -227,6 +229,8 @@ def save(self, packer=None):
)
elif packer == "lz4":
self.save_fs(writer, data_flag=194, block_info_flag=2)
elif packer == "lz4hc":
self.save_fs(writer, data_flag=195, block_info_flag=3)
elif packer == "lzma":
self.save_fs(writer, data_flag=65, block_info_flag=1)
elif isinstance(packer, tuple):
Expand All @@ -242,12 +246,13 @@ def save_fs(self, writer: EndianBinaryWriter, data_flag: int, block_info_flag: i

# 0b1000000 / 0b11000000 | 64 / 192 - uncompressed
# 0b11000010 | 194 - lz4
# 0b11000011 | 195 - lz4hc
# block_info_flag

# 0 / 0b1000000 | 0 / 64 - uncompressed
# 0b1 | 1 - lzma
# 0b10 | 2 - lz4
# 0b11 | 3 - lz4hc [not implemented]
# 0b11 | 3 - lz4hc
# 0b100 | 4 - lzham [not implemented]
# data_flag

Expand Down