Make fridge-copy able to chown files

scone/default/recipes/fridge.py

@@ -44,7 +44,7 @@ from scone.default.utensils.basic_utensils import (
 from scone.head.head import Head
 from scone.head.kitchen import Kitchen, Preparation
 from scone.head.recipe import Recipe, RecipeContext
-from scone.head.utils import check_type
+from scone.head.utils import check_type, check_type_opt
 
 logger = logging.getLogger(__name__)
 
@@ -85,6 +85,9 @@ class FridgeCopy(Recipe):
         self.fridge_meta: FridgeMetadata = meta
         self.mode = parse_mode(mode, directory=False)
 
+        self.targ_user = check_type_opt(args.get("owner"), str)
+        self.targ_group = check_type_opt(args.get("group"), str)
+
         self._desugared_src = desugared_src
 
     def prepare(self, preparation: Preparation, head: Head) -> None:
@@ -92,6 +95,12 @@ class FridgeCopy(Recipe):
         preparation.provides("file", str(self.destination))
         preparation.needs("directory", str(self.destination.parent))
 
+        if self.targ_user:
+            preparation.needs("os-user", self.targ_user)
+
+        if self.targ_group:
+            preparation.needs("os-group", self.targ_group)
+
     async def cook(self, k: Kitchen) -> None:
         data = await load_and_transform(
             k, self.fridge_meta, self.real_path, self.recipe_context.variables
@@ -103,6 +112,13 @@ class FridgeCopy(Recipe):
         if await chan.recv() != "OK":
             raise RuntimeError(f"WriteFail failed on fridge-copy to {self.destination}")
 
+        if self.targ_user or self.targ_group:
+            await k.ut0(Chown(
+                dest_str,
+                self.targ_user,
+                self.targ_group
+            ))
+
         # this is the wrong thing
         # hash_of_data = sha256_bytes(data)
         # k.get_dependency_tracker().register_remote_file(dest_str, hash_of_data)

scone/default/utensils/basic_utensils.py

@@ -22,7 +22,7 @@ import os
 import pwd
 import shutil
 import stat
-from typing import List
+from typing import List, Optional
 
 import attr
 
@@ -117,8 +117,8 @@ class Stat(Utensil):
 @attr.s(auto_attribs=True)
 class Chown(Utensil):
     path: str
-    user: str
-    group: str
+    user: Optional[str]
+    group: Optional[str]
 
     async def execute(self, channel: Channel, worktop):
         shutil.chown(self.path, self.user, self.group)