Versioning based on btrfs snapshots

bottles/backend/managers/backup.py

@@ -25,6 +25,7 @@
 from bottles.backend.globals import Paths
 from bottles.backend.logger import Logger
 from bottles.backend.managers.manager import Manager
+from bottles.backend.models.btrfssubvolume import duplicate_bottle_as_subvolume, DuplicateResult
 from bottles.backend.models.config import BottleConfig
 from bottles.backend.models.result import Result
 from bottles.backend.state import Task, TaskManager
@@ -186,26 +187,28 @@ def _duplicate_bottle_directory(
         config: BottleConfig, source_path: str, destination_path: str, new_name: str
     ) -> Result:
         try:
-            if not os.path.exists(destination_path):
+            duplicate_result = duplicate_bottle_as_subvolume(source_path, destination_path)
+            if not duplicate_result.destination_directories_created():
                 os.makedirs(destination_path)
-            for item in [
-                "drive_c",
-                "system.reg",
-                "user.reg",
-                "userdef.reg",
-                "bottle.yml",
-            ]:
-                source_item = os.path.join(source_path, item)
-                destination_item = os.path.join(destination_path, item)
-                if os.path.isdir(source_item):
-                    shutil.copytree(
-                        source_item,
-                        destination_item,
-                        ignore=shutil.ignore_patterns(".*"),
-                        symlinks=True,
-                    )
-                elif os.path.isfile(source_item):
-                    shutil.copy(source_item, destination_item)
+            if not duplicate_result.bottle_contents_is_duplicated():
+                for item in [
+                    "drive_c",
+                    "system.reg",
+                    "user.reg",
+                    "userdef.reg",
+                    "bottle.yml",
+                ]:
+                    source_item = os.path.join(source_path, item)
+                    destination_item = os.path.join(destination_path, item)
+                    if os.path.isdir(source_item):
+                        shutil.copytree(
+                            source_item,
+                            destination_item,
+                            ignore=shutil.ignore_patterns(".*"),
+                            symlinks=True,
+                        )
+                    elif os.path.isfile(source_item):
+                        shutil.copy(source_item, destination_item)
 
             # Update the bottle configuration
             config_path = os.path.join(destination_path, "bottle.yml")

bottles/backend/managers/btrfssubvolume.py

@@ -0,0 +1,22 @@
+import bottles.backend.models.btrfssubvolume as btrfssubvolume
+
+class BtrfsSubvolumeManager:
+    """
+    Manager to handle bottles created as btrfs subvolume.
+    """
+
+    def __init__(
+        self,
+        manager,
+    ):
+        self._manager = manager
+
+    @staticmethod
+    def create_bottle_as_subvolume(bottle_path) -> bool:
+        return btrfssubvolume.create_bottle_as_subvolume(bottle_path)
+
+    @staticmethod
+    def delete_all_snapshots(bottle_path):
+        snapshots_handle = btrfssubvolume.try_create_bottle_snapshots_handle(bottle_path)
+        if snapshots_handle:
+            snapshots_handle.delete_all_snapshots()

bottles/backend/managers/manager.py

@@ -37,6 +37,7 @@
 from bottles.backend.dlls.vkd3d import VKD3DComponent
 from bottles.backend.globals import Paths
 from bottles.backend.logger import Logger
+from bottles.backend.managers.btrfssubvolume import BtrfsSubvolumeManager
 from bottles.backend.managers.component import ComponentManager
 from bottles.backend.managers.data import DataManager, UserDataKeys
 from bottles.backend.managers.dependency import DependencyManager
@@ -152,6 +153,7 @@ def __init__(
         times["RepositoryManager"] = time.time()
         self.versioning_manager = VersioningManager(self)
         times["VersioningManager"] = time.time()
+        self.btrfs_subvolume_manager = BtrfsSubvolumeManager(self)
         self.component_manager = ComponentManager(self, _offline)
         self.installer_manager = InstallerManager(self, _offline)
         self.dependency_manager = DependencyManager(self, _offline)
@@ -1461,17 +1463,14 @@ def create_bottle_from_config(self, config: BottleConfig) -> bool:
         # create the bottle path
         bottle_path = os.path.join(Paths.bottles, config.Name)
 
-        if not os.path.exists(bottle_path):
-            """
-            If the bottle does not exist, create it, else
-            append a random number to the name.
-            """
-            os.makedirs(bottle_path)
-        else:
+        # If the bottle exists append a random number to the name.
+        if os.path.exists(bottle_path):
             rnd = random.randint(100, 200)
             bottle_path = f"{bottle_path}__{rnd}"
             config.Name = f"{config.Name}__{rnd}"
             config.Path = f"{config.Path}__{rnd}"
+
+        if not self.btrfs_subvolume_manager.create_bottle_as_subvolume(bottle_path):
             os.makedirs(bottle_path)
 
         # Pre-create drive_c directory and set the case-fold flag
@@ -1685,14 +1684,15 @@ def components_check():
 
         # create the bottle directory
         try:
-            os.makedirs(bottle_complete_path)
+            if not self.btrfs_subvolume_manager.create_bottle_as_subvolume(bottle_complete_path):
+                os.makedirs(bottle_complete_path)
             # Pre-create drive_c directory and set the case-fold flag
             bottle_drive_c = os.path.join(bottle_complete_path, "drive_c")
             os.makedirs(bottle_drive_c)
             FileUtils.chattr_f(bottle_drive_c)
-        except:
+        except RuntimeError as e:
             logging.error(
-                f"Failed to create bottle directory: {bottle_complete_path}", jn=True
+                f"Failed to create bottle directory '{bottle_complete_path}' {e}", jn=True
             )
             log_update(_("Failed to create bottle directory."))
             return Result(False)
@@ -2089,6 +2089,7 @@ def delete_bottle(self, config: BottleConfig) -> bool:
 
         logging.info("Removing the bottle…")
         path = ManagerUtils.get_bottle_path(config)
+        self.btrfs_subvolume_manager.delete_all_snapshots(path)
         subprocess.run(["rm", "-rf", path], stdout=subprocess.DEVNULL)
 
         self.update_bottles(silent=True)

bottles/backend/managers/meson.build

@@ -4,6 +4,7 @@ managersdir = join_paths(pkgdatadir, 'bottles/backend/managers')
 bottles_sources = [
   '__init__.py',
   'backup.py',
+  'btrfssubvolume.py',
   'component.py',
   'dependency.py',
   'installer.py',