Removed pydantic dependency (#138)

pyproject.toml

@@ -27,13 +27,12 @@ classifiers = [
 ]
 dependencies = [
     "databricks-sdk~=0.7.0",
-    "typer[all]>=0.9.0,<0.10.0",
-    "pyhocon>=0.3.60,<0.4.0",
-    "pydantic>=2.0.3, <3.0.0",
     "PyYAML>=6.0.0,<7.0.0",
-    "ratelimit>=2.2.1,<3.0.0",
+
+    # TODO: remove later
+    "typer[all]>=0.9.0,<0.10.0",
     "pandas>=2.0.3,<3.0.0",
-    "python-dotenv>=1.0.0,<=2.0.0",
+    "ratelimit>=2.2.1,<3.0.0",
     "tenacity>=8.2.2,<9.0.0",
 ]
 

src/databricks/labs/ucx/cli/app.py

@@ -9,10 +9,10 @@
 
 @app.command()
 def migrate_groups(config_file: Annotated[Path, typer.Argument(help="Path to config file")] = "migration_config.yml"):
-    from databricks.labs.ucx.cli.utils import get_migration_config
+    from databricks.labs.ucx.config import MigrationConfig
     from databricks.labs.ucx.toolkits.group_migration import GroupMigrationToolkit
 
-    config = get_migration_config(config_file)
+    config = MigrationConfig.from_file(config_file)
     toolkit = GroupMigrationToolkit(config)
     toolkit.prepare_environment()
 

src/databricks/labs/ucx/config.py

@@ -1,6 +1,7 @@
+from dataclasses import dataclass
+from pathlib import Path
+
 from databricks.sdk.core import Config
-from pydantic import RootModel
-from pydantic.dataclasses import dataclass
 
 from databricks.labs.ucx.__about__ import __version__
 
@@ -17,6 +18,10 @@ def __repr__(self):
     def to_spark(self):
         return self.__repr__()
 
+    @classmethod
+    def from_dict(cls, raw: dict):
+        return cls(**raw)
+
 
 @dataclass
 class GroupsConfig:
@@ -32,11 +37,19 @@ def __post_init__(self):
             msg = "No selected groups provided, but auto-collection is disabled"
             raise ValueError(msg)
 
+    @classmethod
+    def from_dict(cls, raw: dict):
+        return cls(**raw)
+
 
 @dataclass
 class InventoryConfig:
     table: InventoryTable
 
+    @classmethod
+    def from_dict(cls, raw: dict):
+        return cls(table=InventoryTable.from_dict(raw.get("table")))
+
 
 @dataclass
 class ConnectConfig:
@@ -72,6 +85,10 @@ def from_databricks_config(cfg: Config) -> "ConnectConfig":
             rate_limit=cfg.rate_limit,
         )
 
+    @classmethod
+    def from_dict(cls, raw: dict):
+        return cls(**raw)
+
 
 @dataclass
 class MigrationConfig:
@@ -83,10 +100,46 @@ class MigrationConfig:
     log_level: str | None = "INFO"
 
     def __post_init__(self):
+        if self.connect is None:
+            self.connect = ConnectConfig()
         if self.with_table_acls:
             msg = "Table ACLS are not yet implemented"
             raise NotImplementedError(msg)
 
+    def as_dict(self) -> dict:
+        from dataclasses import fields, is_dataclass
+
+        def inner(x):
+            if is_dataclass(x):
+                result = []
+                for f in fields(x):
+                    value = inner(getattr(x, f.name))
+                    if not value:
+                        continue
+                    result.append((f.name, value))
+                return dict(result)
+            return x
+
+        return inner(self)
+
+    @classmethod
+    def from_dict(cls, raw: dict) -> "MigrationConfig":
+        return cls(
+            inventory=InventoryConfig.from_dict(raw.get("inventory", {})),
+            with_table_acls=raw.get("with_table_acls", False),
+            groups=GroupsConfig.from_dict(raw.get("groups", {})),
+            connect=ConnectConfig.from_dict(raw.get("connect", {})),
+            num_threads=raw.get("num_threads", 4),
+            log_level=raw.get("log_level", "INFO"),
+        )
+
+    @classmethod
+    def from_file(cls, config_file: Path) -> "MigrationConfig":
+        from yaml import safe_load
+
+        raw = safe_load(config_file.read_text())
+        return MigrationConfig.from_dict({} if not raw else raw)
+
     def to_databricks_config(self) -> Config:
         connect = self.connect
         if connect is None:
@@ -109,6 +162,3 @@ def to_databricks_config(self) -> Config:
             product="ucx",
             product_version=__version__,
         )
-
-    def to_json(self) -> str:
-        return RootModel[MigrationConfig](self).model_dump_json(indent=4)

src/databricks/labs/ucx/inventory/inventorizer.py

@@ -208,7 +208,7 @@ def _prepare_permissions_inventory_item(self, scope: SecretScope) -> Permissions
             object_id=scope.name,
             logical_object_type=LogicalObjectType.SECRET_SCOPE,
             request_object_type=None,
-            raw_object_permissions=json.dumps(acls_container.model_dump(mode="json")),
+            raw_object_permissions=json.dumps(acls_container.as_dict()),
         )
 
     def inventorize(self) -> list[PermissionsInventoryItem]:

src/databricks/labs/ucx/inventory/permissions.py

@@ -184,6 +184,7 @@ def _scope_permissions_applicator(self, request_payload: SecretsPermissionReques
                 scope=request_payload.object_id, principal=_acl_item.principal, permission=_acl_item.permission
             )
             logger.debug(f"Applied new permissions for scope {request_payload.object_id}: {_acl_item}")
+            # TODO: add mixin to SDK
             # in-flight check for the applied permissions
             # the api might be inconsistent, therefore we need to check that the permissions were applied
             for _ in range(3):

src/databricks/labs/ucx/inventory/table.py

@@ -47,7 +47,7 @@ def cleanup(self):
     def save(self, items: list[PermissionsInventoryItem]):
         # TODO: update instead of append
         logger.info(f"Saving {len(items)} items to inventory table {self.config.table}")
-        serialized_items = pd.DataFrame([item.model_dump(mode="json") for item in items])
+        serialized_items = pd.DataFrame([item.as_dict() for item in items])
         df = self.spark.createDataFrame(serialized_items, schema=self._table_schema)
         df.write.mode("append").format("delta").saveAsTable(self.config.table.to_spark())
         logger.info("Successfully saved the items to inventory table")

src/databricks/labs/ucx/inventory/types.py

@@ -1,11 +1,10 @@
 import json
+from dataclasses import asdict, dataclass
 
 import pandas as pd
 from databricks.sdk.service.iam import ObjectPermissions
 from databricks.sdk.service.workspace import AclItem as SdkAclItem
 from databricks.sdk.service.workspace import AclPermission as SdkAclPermission
-from pydantic import BaseModel
-from pydantic.tools import parse_obj_as
 
 from databricks.labs.ucx.generic import StrEnum
 
@@ -30,16 +29,6 @@ def __repr__(self):
         return self.value
 
 
-class SqlRequestObjectType(StrEnum):
-    ALERTS = "alerts"
-    DASHBOARDS = "dashboards"
-    DATA_SOURCES = "data-sources"
-    QUERIES = "queries"
-
-    def __repr__(self):
-        return self.value
-
-
 class LogicalObjectType(StrEnum):
     ENTITLEMENTS = "ENTITLEMENTS"
     ROLES = "ROLES"
@@ -69,12 +58,18 @@ class AclPermission(StrEnum):
     MANAGE = "MANAGE"
 
 
-class AclItem(BaseModel):
+@dataclass
+class AclItem:
     principal: str
     permission: AclPermission
 
+    @classmethod
+    def from_dict(cls, raw: dict):
+        return cls(principal=raw.get("principal", None), permission=AclPermission(raw.get("permission")))
+
 
-class AclItemsContainer(BaseModel):
+@dataclass
+class AclItemsContainer:
     acls: list[AclItem]
 
     @staticmethod
@@ -89,16 +84,25 @@ def to_sdk(self) -> list[SdkAclItem]:
             SdkAclItem(principal=acl.principal, permission=SdkAclPermission(acl.permission.value)) for acl in self.acls
         ]
 
+    @classmethod
+    def from_dict(cls, raw: dict) -> "AclItemsContainer":
+        return cls(acls=[AclItem.from_dict(a) for a in raw.get("acls", [])])
+
+    def as_dict(self) -> dict:
+        return asdict(self)
+
 
-class RolesAndEntitlements(BaseModel):
+@dataclass
+class RolesAndEntitlements:
     roles: list
     entitlements: list
 
 
-class PermissionsInventoryItem(BaseModel):
+@dataclass
+class PermissionsInventoryItem:
     object_id: str
     logical_object_type: LogicalObjectType
-    request_object_type: RequestObjectType | SqlRequestObjectType | None
+    request_object_type: RequestObjectType | None
     raw_object_permissions: str
 
     @property
@@ -108,13 +112,27 @@ def object_permissions(self) -> dict:
     @property
     def typed_object_permissions(self) -> ObjectPermissions | AclItemsContainer | RolesAndEntitlements:
         if self.logical_object_type == LogicalObjectType.SECRET_SCOPE:
-            return parse_obj_as(AclItemsContainer, self.object_permissions)
+            return AclItemsContainer.from_dict(self.object_permissions)
         elif self.logical_object_type in [LogicalObjectType.ROLES, LogicalObjectType.ENTITLEMENTS]:
-            return parse_obj_as(RolesAndEntitlements, self.object_permissions)
+            return RolesAndEntitlements(**self.object_permissions)
         else:
             return ObjectPermissions.from_dict(self.object_permissions)
 
     @staticmethod
     def from_pandas(source: pd.DataFrame) -> list["PermissionsInventoryItem"]:
         items = source.to_dict(orient="records")
-        return [PermissionsInventoryItem(**item) for item in items]
+        return [PermissionsInventoryItem.from_dict(item) for item in items]
+
+    def as_dict(self) -> dict:
+        return asdict(self)
+
+    @classmethod
+    def from_dict(cls, raw: dict) -> "PermissionsInventoryItem":
+        return cls(
+            object_id=raw["object_id"],
+            logical_object_type=LogicalObjectType(raw["logical_object_type"]),
+            request_object_type=RequestObjectType(raw["request_object_type"])
+            if raw.get("request_object_type", None) is not None
+            else None,
+            raw_object_permissions=raw.get("raw_object_permissions", None),
+        )

tests/integration/test_e2e.py

@@ -176,7 +176,6 @@ def test_e2e(
         with_table_acls=False,
         inventory=InventoryConfig(table=inventory_table),
         groups=GroupsConfig(selected=[g[0].display_name for g in env.groups]),
-        auth=None,
         log_level="DEBUG",
     )
     toolkit = GroupMigrationToolkit(config)

tests/unit/test_config.py

@@ -5,9 +5,7 @@
 
 import pytest
 import yaml
-from pydantic import RootModel
 
-from databricks.labs.ucx.cli.utils import get_migration_config
 from databricks.labs.ucx.config import (
     GroupsConfig,
     InventoryConfig,
@@ -61,8 +59,9 @@ def test_reader(tmp_path: Path):
         config: MigrationConfig = mc(with_table_acls=False)
         config_file = tmp_path / "config.yml"
 
+        as_dict = config.as_dict()
         with config_file.open("w") as writable:
-            yaml.safe_dump(RootModel[MigrationConfig](config).model_dump(), writable)
+            yaml.safe_dump(as_dict, writable)
 
-        loaded = get_migration_config(config_file)
+        loaded = MigrationConfig.from_file(config_file)
         assert loaded == config

tests/unit/test_serde.py

@@ -1,6 +1,7 @@
+import dataclasses
+
 from databricks.sdk.service.workspace import AclItem as SdkAclItem
 from databricks.sdk.service.workspace import AclPermission as SdkAclPermission
-from pydantic.tools import parse_obj_as
 
 from databricks.labs.ucx.inventory.types import AclItemsContainer
 
@@ -17,7 +18,7 @@ def test_acl_items_container_serde():
 
     assert after == sdk_items
 
-    _dump = container.model_dump(mode="json")
-    _str = parse_obj_as(AclItemsContainer, _dump)
+    _dump = dataclasses.asdict(container)
+    _str = AclItemsContainer.from_dict(_dump)
 
     assert _str == container