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[core] Implement delta manifests

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derrod 2020-09-05 05:05:21 +02:00
parent e1fc3df180
commit 4b4483c580
1 changed files with 19 additions and 0 deletions
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19
legendary/core.py
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@ -641,6 +641,14 @@ class LegendaryCore:
return new_manifest_data, base_urls
def get_delta_manifest(self, base_url, old_build_id, new_build_id):
"""Get optimized delta manifest (doesn't seem to exist for most games)"""
r = self.egs.unauth_session.get(f'{base_url}/Deltas/{new_build_id}/{old_build_id}.delta')
if r.status_code == 200:
return r.content
else:
return None
def prepare_download(self, game: Game, base_game: Game = None, base_path: str = '',
status_q: Queue = None, max_shm: int = 0, max_workers: int = 0,
force: bool = False, disable_patching: bool = False,
@ -691,6 +699,17 @@ class LegendaryCore:
# save manifest with version name as well for testing/downgrading/etc.
self.lgd.save_manifest(game.app_name, new_manifest_data,
version=new_manifest.meta.build_version)
# also fetch optimized delta manifest (may not exist)
if old_manifest and new_manifest and not (override_old_manifest or override_manifest):
delta_manifest_data = self.get_delta_manifest(randchoice(base_urls),
old_manifest.meta.build_id,
new_manifest.meta.build_id)
if delta_manifest_data:
delta_manifest = self.load_manifest(delta_manifest_data)
self.log.info(f'Using optimized delta manifest to upgrade from build'
f'"{old_manifest.meta.build_id}" to'
f'"{new_manifest.meta.build_id}"...')
new_manifest = delta_manifest
# reuse existing installation's directory
if igame := self.get_installed_game(base_game.app_name if base_game else game.app_name):