[cli/core] Add overrides for old manifest and install dir

README.md

@@ -6,10 +6,10 @@ Legendary (named after the next highest tier [in item rarity](https://wow.gamepe
 
 Right now it is in an early public pre-release stage and still needs a lot of work to work. But it does work!
 
-**Currently implemented:**
- - Authenticate with Epic (can import authentication from EGS installation [Windows only])
+**What works:**
+ - Authenticate with Epic
  - Download and install games
- - Update installed games (not well tested/potentially buggy)
+ - Update installed games and their DLC
  - Launch games with online authentication
 
 **Planned:**

legendary/cli.py

@@ -60,12 +60,16 @@ def main():
     download_group = parser.add_argument_group('Downloading options')
     download_group.add_argument('--base-path', dest='base_path', action='store', metavar='<path>',
                                 help='Path for game installations (defaults to ~/legendary)')
+    download_group.add_argument('--game-folder', dest='game_folder', action='store', metavar='<path>',
+                                help='Folder for game installation (defaults to folder in metadata)')
     download_group.add_argument('--max-shared-memory', dest='shared_memory', action='store', metavar='<size>',
                                 type=int, help='Maximum amount of shared memory to use (in MiB), default: 1 GiB')
     download_group.add_argument('--max-workers', dest='max_workers', action='store', metavar='<num>',
                                 type=int, help='Maximum amount of download workers, default: 2 * logical CPU')
     download_group.add_argument('--manifest', dest='override_manifest', action='store', metavar='<uri>',
                                 help='Manifest URL or path to use instead of the CDN one (e.g. for downgrading)')
+    download_group.add_argument('--old-manifest', dest='override_old_manifest', action='store', metavar='<uri>',
+                                help='Manifest URL or path to use as the old one (e.g. for testing patching)')
     download_group.add_argument('--base-url', dest='override_base_url', action='store', metavar='<url>',
                                 help='Base URL to download from (e.g. to test or switch to a different CDNs)')
     download_group.add_argument('--force', dest='force', action='store_true',
@@ -255,9 +259,10 @@ def main():
         # todo use status queue to print progress from CLI
         dlm, analysis, igame = core.prepare_download(game=game, base_game=base_game, base_path=args.base_path,
                                                      force=args.force, max_shm=args.shared_memory,
-                                                     max_workers=args.max_workers,
+                                                     max_workers=args.max_workers, game_folder=args.game_folder,
                                                      disable_patching=args.disable_patching,
                                                      override_manifest=args.override_manifest,
+                                                     override_old_manifest=args.override_old_manifest,
                                                      override_base_url=args.override_base_url)
 
         # game is either up to date or hasn't changed, so we have nothing to do

legendary/core.py

@@ -292,7 +292,8 @@ class LegendaryCore:
 
     def prepare_download(self, game: Game, base_game: Game = None, base_path: str = '',
                          max_shm: int = 0, max_workers: int = 0, force: bool = False,
-                         disable_patching: bool = False, override_manifest: str = '',
+                         disable_patching: bool = False, game_folder: str = '',
+                         override_manifest: str = '', override_old_manifest: str = '',
                          override_base_url: str = '') -> (DLManager, AnalysisResult, ManifestMeta):
 
         # load old manifest
@@ -300,7 +301,16 @@ class LegendaryCore:
         new_manifest_data = b''
 
         # load old manifest if we have one
-        if not disable_patching and not force and self.is_installed(game.app_name):
+        if override_old_manifest:
+            if override_old_manifest.startswith('http'):
+                r = self.egs.unauth_session.get(override_old_manifest)
+                r.raise_for_status()
+                old_manifest_data = r.content
+            else:
+                with open(override_old_manifest, 'rb') as f:
+                    old_manifest_data = f.read()
+            old_manifest = self.load_manfiest(old_manifest_data)
+        elif not disable_patching and not force and self.is_installed(game.app_name):
             if old_bytes := self.lgd.get_manifest(game.app_name):
                 old_manifest = self.load_manfiest(old_bytes)
 
@@ -349,9 +359,7 @@ class LegendaryCore:
         self.lgd.save_manifest(game.app_name, new_manifest_data,
                                filename=f'{game.app_name}_{new_manifest.meta.build_version}', old=True)
 
-        if not base_path:
-            base_path = self.get_default_install_dir()
-
+        if not game_folder:
             if game.is_dlc:
                 game_folder = base_game.metadata.get('customAttributes', {}).\
                     get('FolderName', {}).get('value', base_game.app_name)
@@ -359,6 +367,9 @@ class LegendaryCore:
                 game_folder = game.metadata.get('customAttributes', {}).\
                     get('FolderName', {}).get('value', game.app_name)
 
+        if not base_path:
+            base_path = self.get_default_install_dir()
+
         install_path = os.path.join(base_path, game_folder)
 
         if not os.path.exists(install_path):