distro/package: add acquire() parameters to Distro interface: dest_dir: Optional[str], filename: Optional[str]

distro/package.py

@@ -3,8 +3,8 @@ import os
 
 from typing import Optional, Union
 
-from exec.file import get_temp_dir, makedir
+from exec.file import copy_file, get_temp_dir, makedir
-from utils import download_file
+from utils import download_file, sha256sum
 
 
 class PackageInfo:
@@ -61,16 +61,20 @@ class BinaryPackage(PackageInfo):
         p._desc = desc
         return p
 
-    def acquire(self) -> str:
+    def acquire(self, dest_dir: Optional[str] = None, filename: Optional[str] = None) -> str:
         raise NotImplementedError()
 
 
 class LocalPackage(BinaryPackage):
 
-    def acquire(self) -> str:
+    def acquire(self, dest_dir: Optional[str] = None, filename: Optional[str] = None) -> str:
         assert self.resolved_url and self.filename and self.filename in self.resolved_url
         path = f'{self.resolved_url.split("file://")[1]}'
-        assert os.path.exists(path) or print(path)
+        if dest_dir:
+            target = os.path.join(dest_dir, filename or self.filename)
+            if os.path.getsize(path) != os.path.getsize(target) or sha256sum(path) != sha256sum(target):
+                copy_file(path, target, follow_symlinks=True)
+            return target
         return path