mirror of
https://github.com/derrod/legendary.git
synced 2024-12-22 01:45:28 +00:00
[models] Improve manifest serialisation support
Manifests up to version 21 can now be serialised with all new features enabled.* *SHA256 hash of EGL and Legendary serialised manifest matched, but new features weren't used yet, so at empty placeholder data works correctly.
This commit is contained in:
derrod
parent
ddb7e1c3ca
commit
cf22de2bcf
|
|
@ -9,6 +9,7 @@ import zlib
|
|||
|
||||
from base64 import b64encode
|
||||
from io import BytesIO
|
||||
from typing import Optional
|
||||
|
||||
logger = logging.getLogger('Manifest')
|
||||
|
||||
|
|
@ -63,7 +64,7 @@ def get_chunk_dir(version):
|
|||
|
||||
class Manifest:
|
||||
header_magic = 0x44BEC00C
|
||||
serialisation_version = 18
|
||||
default_serialisation_version = 17
|
||||
|
||||
def __init__(self):
|
||||
self.header_size = 41
|
||||
|
|
@ -75,10 +76,10 @@ class Manifest:
|
|||
self.data = b''
|
||||
|
||||
# remainder
|
||||
self.meta = None
|
||||
self.chunk_data_list = None
|
||||
self.file_manifest_list = None
|
||||
self.custom_fields = None
|
||||
self.meta: Optional[ManifestMeta] = None
|
||||
self.chunk_data_list: Optional[CDL] = None
|
||||
self.file_manifest_list: Optional[FML] = None
|
||||
self.custom_fields: Optional[CustomFields] = None
|
||||
|
||||
@property
|
||||
def compressed(self):
|
||||
|
|
@ -139,6 +140,26 @@ class Manifest:
|
|||
def write(self, fp=None, compress=True):
|
||||
body_bio = BytesIO()
|
||||
|
||||
# set serialisation version based on enabled features or original version
|
||||
target_version = max(self.default_serialisation_version, self.meta.feature_level)
|
||||
if self.meta.data_version == 2:
|
||||
target_version = max(21, target_version)
|
||||
elif self.file_manifest_list.version == 2:
|
||||
target_version = max(20, target_version)
|
||||
elif self.file_manifest_list.version == 1:
|
||||
target_version = max(19, target_version)
|
||||
elif self.meta.data_version == 1:
|
||||
target_version = max(18, target_version)
|
||||
|
||||
# Downgrade manifest if unknown newer version
|
||||
if target_version > 21:
|
||||
logger.warning(f'Trying to serialise an unknown target version: {target_version},'
|
||||
f'clamping to 21.')
|
||||
target_version = 21
|
||||
|
||||
# Ensure metadata will be correct
|
||||
self.meta.feature_level = target_version
|
||||
|
||||
self.meta.write(body_bio)
|
||||
self.chunk_data_list.write(body_bio)
|
||||
self.file_manifest_list.write(body_bio)
|
||||
|
|
@ -161,7 +182,7 @@ class Manifest:
|
|||
bio.write(struct.pack('<I', self.size_compressed))
|
||||
bio.write(self.sha_hash)
|
||||
bio.write(struct.pack('B', self.stored_as))
|
||||
bio.write(struct.pack('<I', self.serialisation_version))
|
||||
bio.write(struct.pack('<I', target_version))
|
||||
bio.write(self.data)
|
||||
|
||||
return bio.tell() if fp else bio.getvalue()
|
||||
|
|
@ -205,8 +226,6 @@ class Manifest:
|
|||
|
||||
|
||||
class ManifestMeta:
|
||||
serialisation_version = 0
|
||||
|
||||
def __init__(self):
|
||||
self.meta_size = 0
|
||||
self.data_version = 0
|
||||
|
|
@ -288,7 +307,7 @@ class ManifestMeta:
|
|||
meta_start = bio.tell()
|
||||
|
||||
bio.write(struct.pack('<I', 0)) # placeholder size
|
||||
bio.write(struct.pack('B', self.serialisation_version))
|
||||
bio.write(struct.pack('B', self.data_version))
|
||||
bio.write(struct.pack('<I', self.feature_level))
|
||||
bio.write(struct.pack('B', self.is_file_data))
|
||||
bio.write(struct.pack('<I', self.app_id))
|
||||
|
|
@ -305,8 +324,11 @@ class ManifestMeta:
|
|||
write_fstring(bio, self.prereq_path)
|
||||
write_fstring(bio, self.prereq_args)
|
||||
|
||||
if self.data_version > 0:
|
||||
if self.data_version >= 1:
|
||||
write_fstring(bio, self.build_id)
|
||||
if self.data_version >= 2:
|
||||
write_fstring(bio, self.uninstall_action_path)
|
||||
write_fstring(bio, self.uninstall_action_args)
|
||||
|
||||
meta_end = bio.tell()
|
||||
bio.seek(meta_start)
|
||||
|
|
@ -315,8 +337,6 @@ class ManifestMeta:
|
|||
|
||||
|
||||
class CDL:
|
||||
serialisation_version = 0
|
||||
|
||||
def __init__(self):
|
||||
self.version = 0
|
||||
self.size = 0
|
||||
|
|
@ -425,7 +445,7 @@ class CDL:
|
|||
def write(self, bio):
|
||||
cdl_start = bio.tell()
|
||||
bio.write(struct.pack('<I', 0)) # placeholder size
|
||||
bio.write(struct.pack('B', self.serialisation_version))
|
||||
bio.write(struct.pack('B', self.version))
|
||||
bio.write(struct.pack('<I', len(self.elements)))
|
||||
|
||||
for chunk in self.elements:
|
||||
|
|
@ -504,8 +524,6 @@ class ChunkInfo:
|
|||
|
||||
|
||||
class FML:
|
||||
serialisation_version = 0
|
||||
|
||||
def __init__(self):
|
||||
self.version = 0
|
||||
self.size = 0
|
||||
|
|
@ -606,7 +624,7 @@ class FML:
|
|||
def write(self, bio):
|
||||
fml_start = bio.tell()
|
||||
bio.write(struct.pack('<I', 0)) # placeholder size
|
||||
bio.write(struct.pack('B', self.serialisation_version))
|
||||
bio.write(struct.pack('B', self.version))
|
||||
bio.write(struct.pack('<I', len(self.elements)))
|
||||
|
||||
for fm in self.elements:
|
||||
|
|
@ -632,6 +650,20 @@ class FML:
|
|||
bio.write(struct.pack('<I', cp.offset))
|
||||
bio.write(struct.pack('<I', cp.size))
|
||||
|
||||
if self.version >= 1:
|
||||
for fm in self.elements:
|
||||
has_md5 = 1 if fm.hash_md5 else 0
|
||||
bio.write(struct.pack('<I', has_md5))
|
||||
if has_md5:
|
||||
bio.write(fm.hash_md5)
|
||||
|
||||
for fm in self.elements:
|
||||
write_fstring(bio, fm.mime_type)
|
||||
|
||||
if self.version >= 2:
|
||||
for fm in self.elements:
|
||||
bio.write(fm.hash_sha256)
|
||||
|
||||
fml_end = bio.tell()
|
||||
bio.seek(fml_start)
|
||||
bio.write(struct.pack('<I', fml_end - fml_start))
|
||||
|
|
@ -675,6 +707,7 @@ class FileManifest:
|
|||
_cp.append('[...]')
|
||||
cp_repr = ', '.join(_cp)
|
||||
|
||||
# ToDo add MD5, MIME, SHA256 if those ever become relevant
|
||||
return '<FileManifest (filename="{}", symlink_target="{}", hash={}, flags={}, ' \
|
||||
'install_tags=[{}], chunk_parts=[{}], file_size={})>'.format(
|
||||
self.filename, self.symlink_target, self.hash.hex(), self.flags,
|
||||
|
|
@ -711,8 +744,6 @@ class ChunkPart:
|
|||
|
||||
|
||||
class CustomFields:
|
||||
serialisation_version = 0
|
||||
|
||||
def __init__(self):
|
||||
self.size = 0
|
||||
self.version = 0
|
||||
|
|
@ -763,7 +794,7 @@ class CustomFields:
|
|||
def write(self, bio):
|
||||
cf_start = bio.tell()
|
||||
bio.write(struct.pack('<I', 0)) # placeholder size
|
||||
bio.write(struct.pack('B', self.serialisation_version))
|
||||
bio.write(struct.pack('B', self.version))
|
||||
bio.write(struct.pack('<I', len(self._dict)))
|
||||
|
||||
for key in self.keys():
|
||||
|
|
|
|||
Loading…
Reference in a new issue