From eccb7f1fdf991aa1c19400e917d65f508f1b2ba5 Mon Sep 17 00:00:00 2001
From: "Kim, Vinnam" <vinnam.kim@intel.com>
Date: Tue, 30 May 2023 16:14:58 +0900
Subject: [PATCH 01/10] Change Environment() to DEFAULT_ENVIRONMENT

Signed-off-by: Kim, Vinnam <vinnam.kim@intel.com>
---
 datumaro/cli/commands/convert.py                       | 10 ++++++----
 datumaro/cli/commands/detect_format.py                 |  4 ++--
 datumaro/cli/commands/download.py                      |  6 +++---
 datumaro/cli/commands/merge.py                         |  4 ++--
 datumaro/cli/commands/patch.py                         |  4 ++--
 .../cli/commands/require_project/modification/add.py   |  6 +++---
 .../commands/require_project/modification/export.py    |  6 +++---
 .../commands/require_project/modification/import_.py   |  6 +++---
 datumaro/cli/commands/transform.py                     |  6 +++---
 datumaro/cli/commands/validate.py                      |  4 ++--
 10 files changed, 29 insertions(+), 27 deletions(-)

diff --git a/datumaro/cli/commands/convert.py b/datumaro/cli/commands/convert.py
index 172e200759..eec361ecd7 100644
--- a/datumaro/cli/commands/convert.py
+++ b/datumaro/cli/commands/convert.py
@@ -8,7 +8,7 @@
 import os.path as osp
 
 from datumaro.components.dataset import Dataset
-from datumaro.components.project import Environment
+from datumaro.components.environment import DEFAULT_ENVIRONMENT
 from datumaro.util.os_util import make_file_name
 
 from ..util import MultilineFormatter
@@ -17,8 +17,10 @@
 
 
 def build_parser(parser_ctor=argparse.ArgumentParser):
-    builtin_readers = sorted(set(Environment().importers) | set(Environment().extractors))
-    builtin_writers = sorted(Environment().exporters)
+    builtin_readers = sorted(
+        set(DEFAULT_ENVIRONMENT.importers) | set(DEFAULT_ENVIRONMENT.extractors)
+    )
+    builtin_writers = sorted(DEFAULT_ENVIRONMENT.exporters)
 
     parser = parser_ctor(
         help="Convert an existing dataset to another format",
@@ -98,7 +100,7 @@ def get_sensitive_args():
 
 
 def convert_command(args):
-    env = Environment()
+    env = DEFAULT_ENVIRONMENT
 
     try:
         exporter = env.exporters[args.output_format]
diff --git a/datumaro/cli/commands/detect_format.py b/datumaro/cli/commands/detect_format.py
index 4251e43270..22ef07c219 100644
--- a/datumaro/cli/commands/detect_format.py
+++ b/datumaro/cli/commands/detect_format.py
@@ -6,7 +6,7 @@
 
 from datumaro.cli.util import MultilineFormatter
 from datumaro.cli.util.project import load_project
-from datumaro.components.environment import Environment
+from datumaro.components.environment import DEFAULT_ENVIRONMENT
 from datumaro.components.errors import ProjectNotFoundError
 from datumaro.components.format_detection import RejectionReason
 from datumaro.util import dump_json_file
@@ -77,7 +77,7 @@ def detect_format_command(args):
     if project is not None:
         env = project.env
     else:
-        env = Environment()
+        env = DEFAULT_ENVIRONMENT
 
     report = {"rejected_formats": {}}
 
diff --git a/datumaro/cli/commands/download.py b/datumaro/cli/commands/download.py
index e67e818056..f3be58ce68 100644
--- a/datumaro/cli/commands/download.py
+++ b/datumaro/cli/commands/download.py
@@ -10,12 +10,12 @@
 import sys
 from typing import Dict
 
+from datumaro.components.environment import DEFAULT_ENVIRONMENT
 from datumaro.components.extractor_tfds import (
     AVAILABLE_TFDS_DATASETS,
     TFDS_EXTRACTOR_AVAILABLE,
     TfdsDatasetRemoteMetadata,
 )
-from datumaro.components.project import Environment
 from datumaro.util import dump_json
 from datumaro.util.os_util import make_file_name
 
@@ -48,7 +48,7 @@ def build_parser(parser_ctor=argparse.ArgumentParser):
 
 
 def build_get_subparser(subparsers: argparse._SubParsersAction):
-    builtin_writers = sorted(Environment().exporters)
+    builtin_writers = sorted(DEFAULT_ENVIRONMENT.exporters)
     if TFDS_EXTRACTOR_AVAILABLE:
         available_datasets = ", ".join(f"tfds:{name}" for name in AVAILABLE_TFDS_DATASETS)
     else:
@@ -137,7 +137,7 @@ def get_sensitive_args():
 
 
 def download_command(args):
-    env = Environment()
+    env = DEFAULT_ENVIRONMENT
 
     if args.dataset_id.startswith("tfds:"):
         if TFDS_EXTRACTOR_AVAILABLE:
diff --git a/datumaro/cli/commands/merge.py b/datumaro/cli/commands/merge.py
index db9d9aaa92..52ce33b3bc 100644
--- a/datumaro/cli/commands/merge.py
+++ b/datumaro/cli/commands/merge.py
@@ -8,7 +8,7 @@
 import os.path as osp
 
 from datumaro.components.dataset import DEFAULT_FORMAT
-from datumaro.components.environment import Environment
+from datumaro.components.environment import DEFAULT_ENVIRONMENT
 from datumaro.components.errors import ProjectNotFoundError
 from datumaro.components.hl_ops import HLOps
 from datumaro.components.merge.intersect_merge import IntersectMerge
@@ -232,7 +232,7 @@ def merge_command(args):
     if project is not None:
         env = project.env
     else:
-        env = Environment()
+        env = DEFAULT_ENVIRONMENT
 
     try:
         exporter = env.exporters[args.format]
diff --git a/datumaro/cli/commands/patch.py b/datumaro/cli/commands/patch.py
index 88164b6c00..bde88aa3d4 100644
--- a/datumaro/cli/commands/patch.py
+++ b/datumaro/cli/commands/patch.py
@@ -7,7 +7,7 @@
 import os
 import os.path as osp
 
-from datumaro.components.environment import Environment
+from datumaro.components.environment import DEFAULT_ENVIRONMENT
 from datumaro.components.errors import ProjectNotFoundError
 from datumaro.util.scope import scope_add, scoped
 
@@ -131,7 +131,7 @@ def patch_command(args):
     if project is not None:
         env = project.env
     else:
-        env = Environment()
+        env = DEFAULT_ENVIRONMENT
 
     target_dataset, _project = parse_full_revpath(args.target, project)
     if _project is not None:
diff --git a/datumaro/cli/commands/require_project/modification/add.py b/datumaro/cli/commands/require_project/modification/add.py
index db048e714e..71f9174ae9 100644
--- a/datumaro/cli/commands/require_project/modification/add.py
+++ b/datumaro/cli/commands/require_project/modification/add.py
@@ -6,7 +6,7 @@
 import argparse
 import logging as log
 
-from datumaro.components.environment import Environment
+from datumaro.components.environment import DEFAULT_ENVIRONMENT
 from datumaro.components.errors import ProjectNotFoundError
 from datumaro.util.scope import on_error_do, scope_add, scoped
 
@@ -21,7 +21,7 @@
 
 
 def build_parser(parser_ctor=argparse.ArgumentParser):
-    env = Environment()
+    env = DEFAULT_ENVIRONMENT
     builtins = sorted(set(env.extractors) | set(env.importers))
 
     parser = parser_ctor(
@@ -125,7 +125,7 @@ def add_command(args):
     if project is not None:
         env = project.env
     else:
-        env = Environment()
+        env = DEFAULT_ENVIRONMENT
 
     fmt = args.format
     if fmt in env.importers:
diff --git a/datumaro/cli/commands/require_project/modification/export.py b/datumaro/cli/commands/require_project/modification/export.py
index 3eefa3bc8a..4a11be8410 100644
--- a/datumaro/cli/commands/require_project/modification/export.py
+++ b/datumaro/cli/commands/require_project/modification/export.py
@@ -7,7 +7,7 @@
 import os
 import os.path as osp
 
-from datumaro.components.environment import Environment
+from datumaro.components.environment import DEFAULT_ENVIRONMENT
 from datumaro.components.errors import ProjectNotFoundError
 from datumaro.components.project import ProjectBuildTargets
 from datumaro.util.os_util import make_file_name
@@ -24,7 +24,7 @@
 
 
 def build_parser(parser_ctor=argparse.ArgumentParser):
-    builtins = sorted(Environment().exporters)
+    builtins = sorted(DEFAULT_ENVIRONMENT.exporters)
 
     parser = parser_ctor(
         help="Export project",
@@ -143,7 +143,7 @@ def export_command(args):
     if project is not None:
         env = project.env
     else:
-        env = Environment()
+        env = DEFAULT_ENVIRONMENT
 
     try:
         exporter = env.exporters[args.format]
diff --git a/datumaro/cli/commands/require_project/modification/import_.py b/datumaro/cli/commands/require_project/modification/import_.py
index 2cfaeff956..9774bdd52b 100644
--- a/datumaro/cli/commands/require_project/modification/import_.py
+++ b/datumaro/cli/commands/require_project/modification/import_.py
@@ -6,7 +6,7 @@
 import logging as log
 import os
 
-from datumaro.components.environment import Environment
+from datumaro.components.environment import DEFAULT_ENVIRONMENT
 from datumaro.components.errors import ProjectNotFoundError
 from datumaro.util.scope import on_error_do, scope_add, scoped
 
@@ -21,7 +21,7 @@
 
 
 def build_parser(parser_ctor=argparse.ArgumentParser):
-    env = Environment()
+    env = DEFAULT_ENVIRONMENT
     builtins = sorted(set(env.extractors) | set(env.importers))
 
     parser = parser_ctor(
@@ -131,7 +131,7 @@ def import_command(args):
     if project is not None:
         env = project.env
     else:
-        env = Environment()
+        env = DEFAULT_ENVIRONMENT
 
     fmt = args.format
     if fmt in env.importers:
diff --git a/datumaro/cli/commands/transform.py b/datumaro/cli/commands/transform.py
index 45fda030b3..12def4d0d1 100644
--- a/datumaro/cli/commands/transform.py
+++ b/datumaro/cli/commands/transform.py
@@ -7,7 +7,7 @@
 import os
 import os.path as osp
 
-from datumaro.components.environment import Environment
+from datumaro.components.environment import DEFAULT_ENVIRONMENT
 from datumaro.components.errors import ProjectNotFoundError
 from datumaro.components.project import ProjectBuildTargets
 from datumaro.util import str_to_bool
@@ -19,7 +19,7 @@
 
 
 def build_parser(parser_ctor=argparse.ArgumentParser):
-    builtins = sorted(Environment().transforms)
+    builtins = sorted(DEFAULT_ENVIRONMENT.transforms)
 
     parser = parser_ctor(
         help="Transform project",
@@ -166,7 +166,7 @@ def transform_command(args):
     if project is not None:
         env = project.env
     else:
-        env = Environment()
+        env = DEFAULT_ENVIRONMENT
 
     try:
         transform = env.transforms[args.transform]
diff --git a/datumaro/cli/commands/validate.py b/datumaro/cli/commands/validate.py
index 3fefc6fe51..21d509da94 100644
--- a/datumaro/cli/commands/validate.py
+++ b/datumaro/cli/commands/validate.py
@@ -5,7 +5,7 @@
 import argparse
 import logging as log
 
-from datumaro.components.environment import Environment
+from datumaro.components.environment import DEFAULT_ENVIRONMENT
 from datumaro.components.errors import ProjectNotFoundError
 from datumaro.components.validator import TaskType
 from datumaro.util import dump_json_file
@@ -113,7 +113,7 @@ def validate_command(args):
     if project is not None:
         env = project.env
     else:
-        env = Environment()
+        env = DEFAULT_ENVIRONMENT
 
     try:
         validator_type = env.validators[args.task]

From cd39895c7657dbf68e76489749afc908177425ad Mon Sep 17 00:00:00 2001
From: "Kim, Vinnam" <vinnam.kim@intel.com>
Date: Tue, 30 May 2023 16:09:43 +0900
Subject: [PATCH 02/10] Lazy import plugins

Signed-off-by: Kim, Vinnam <vinnam.kim@intel.com>
---
 datumaro/components/dataset.py     |  3 +-
 datumaro/components/environment.py | 58 ++++++++++++++++++++++++-----
 datumaro/components/lazy_plugin.py | 59 ++++++++++++++++++++++++++++++
 datumaro/plugins/specs.json        |  1 +
 datumaro/plugins/specs.py          | 49 +++++++++++++++++++++++++
 tests/unit/test_dataset.py         | 52 +++++++++++++-------------
 tests/unit/test_environment.py     | 32 ++++++++++++++++
 tests/unit/test_validator.py       |  2 +-
 8 files changed, 218 insertions(+), 38 deletions(-)
 create mode 100644 datumaro/components/lazy_plugin.py
 create mode 100644 datumaro/plugins/specs.json
 create mode 100644 datumaro/plugins/specs.py
 create mode 100644 tests/unit/test_environment.py

diff --git a/datumaro/components/dataset.py b/datumaro/components/dataset.py
index 615cb0d861..91d2b3d2e0 100644
--- a/datumaro/components/dataset.py
+++ b/datumaro/components/dataset.py
@@ -48,7 +48,6 @@
 from datumaro.components.merge import DEFAULT_MERGE_POLICY
 from datumaro.components.progress_reporting import NullProgressReporter, ProgressReporter
 from datumaro.components.transformer import ItemTransform, Transform
-from datumaro.plugins.transforms import ProjectLabels
 from datumaro.util import is_method_redefined
 from datumaro.util.log_utils import logging_disabled
 from datumaro.util.meta_file_util import load_hash_key
@@ -626,6 +625,8 @@ def update(self, source: Union[DatasetPatch, IDataset, Iterable[DatasetItem]]):
                 else:
                     self.put(source.data.get(*item_id))
         elif isinstance(source, IDataset):
+            from datumaro.plugins.transforms import ProjectLabels
+
             for item in ProjectLabels(
                 source, self.categories().get(AnnotationType.label, LabelCategories())
             ):
diff --git a/datumaro/components/environment.py b/datumaro/components/environment.py
index a064663c8f..46e9bb710e 100644
--- a/datumaro/components/environment.py
+++ b/datumaro/components/environment.py
@@ -6,11 +6,13 @@
 import importlib
 import logging as log
 import os.path as osp
+from contextlib import contextmanager
 from functools import partial
 from inspect import isclass
 from typing import (
     Callable,
     Dict,
+    Generator,
     Generic,
     Iterable,
     Iterator,
@@ -18,6 +20,7 @@
     Optional,
     Sequence,
     Set,
+    Tuple,
     Type,
     TypeVar,
 )
@@ -29,6 +32,7 @@
     RejectionReason,
     detect_dataset_format,
 )
+from datumaro.components.lazy_plugin import PLUGIN_TYPES, LazyPlugin
 from datumaro.util.os_util import import_foreign_module, split_path
 
 T = TypeVar("T")
@@ -36,27 +40,31 @@
 
 class Registry(Generic[T]):
     def __init__(self):
-        self.items: Dict[str, T] = {}
+        self._items: Dict[str, T] = {}
 
     def register(self, name: str, value: T) -> T:
-        self.items[name] = value
+        self._items[name] = value
         return value
 
     def unregister(self, name: str) -> Optional[T]:
-        return self.items.pop(name, None)
+        return self._items.pop(name, None)
 
     def get(self, key: str):
         """Returns a class or a factory function"""
-        return self.items[key]
+        return self._items[key]
 
     def __getitem__(self, key: str) -> T:
         return self.get(key)
 
     def __contains__(self, key) -> bool:
-        return key in self.items
+        return key in self._items
 
     def __iter__(self) -> Iterator[str]:
-        return iter(self.items)
+        return iter(self._items)
+
+    def items(self) -> Generator[Tuple[str, T], None, None]:
+        for key in self:
+            yield key, self.get(key)
 
 
 class PluginRegistry(Registry[Type[CliPlugin]]):
@@ -66,6 +74,13 @@ def __init__(
         super().__init__()
         self._filter = filter
 
+    def get(self, key: str) -> PLUGIN_TYPES:
+        """Returns a class or a factory function"""
+        item = self._items[key]
+        if issubclass(item, LazyPlugin):
+            return item.get_plugin_cls()
+        return item
+
     def batch_register(self, values: Iterable[CliPlugin]):
         for v in values:
             if self._filter and not self._filter(v):
@@ -88,7 +103,7 @@ def _make_filter(cls, accept, skip=None):
     def _check_type(t, *, accept, skip):
         return issubclass(t, accept) and t not in skip
 
-    def __init__(self):
+    def __init__(self, use_lazy_import: bool = True):
         from datumaro.components.dataset_base import DatasetBase, SubsetBase
         from datumaro.components.exporter import Exporter
         from datumaro.components.generator import DatasetGenerator
@@ -98,7 +113,9 @@ def __init__(self):
         from datumaro.components.validator import Validator
 
         _filter = self._make_filter
-        self._extractors = PluginRegistry(_filter(DatasetBase, skip=SubsetBase))
+        self._extractors = PluginRegistry(
+            _filter(DatasetBase, skip=(SubsetBase, Transform, ItemTransform))
+        )
         self._importers = PluginRegistry(_filter(Importer))
         self._launchers = PluginRegistry(_filter(Launcher))
         self._exporters = PluginRegistry(_filter(Exporter))
@@ -106,6 +123,7 @@ def __init__(self):
         self._transforms = PluginRegistry(_filter(Transform, skip=ItemTransform))
         self._validators = PluginRegistry(_filter(Validator))
         self._builtins_initialized = False
+        self._use_lazy_import = use_lazy_import
 
     def _get_plugin_registry(self, name):
         if not self._builtins_initialized:
@@ -210,6 +228,16 @@ def _load_plugins(cls, module_names, *, importer, types=None):
 
     @classmethod
     def _load_builtin_plugins(cls):
+        """Load builtin plugins which will be imported lazily using plugin spec files"""
+        if cls._builtin_plugins is None:
+            from datumaro.plugins.specs import LAZY_PLUGINS
+
+            cls._builtin_plugins = LAZY_PLUGINS
+        return cls._builtin_plugins
+
+    @classmethod
+    def _load_builtin_plugins_from_importlib(cls):
+        """Load builtin plugins from importlib, not lazy import from plugin spec files"""
         if cls._builtin_plugins is None:
             import datumaro.plugins
 
@@ -229,7 +257,11 @@ def load_plugins(self, plugins_dir):
         self.register_plugins(plugins)
 
     def _register_builtin_plugins(self):
-        self.register_plugins(self._load_builtin_plugins())
+        self.register_plugins(
+            self._load_builtin_plugins()
+            if self._use_lazy_import
+            else self._load_builtin_plugins_from_importlib()
+        )
 
     def register_plugins(self, plugins):
         self.extractors.batch_register(plugins)
@@ -274,7 +306,7 @@ def detect_dataset(
             detected_formats = detect_dataset_format(
                 (
                     (format_name, importer.detect)
-                    for format_name, importer in self.importers.items.items()
+                    for format_name, importer in self.importers.items()
                 ),
                 path,
                 rejection_callback=rejection_callback,
@@ -322,5 +354,11 @@ def _register(registry: PluginRegistry):
 
         return merged
 
+    @classmethod
+    @contextmanager
+    def release_builtin_plugins(cls):
+        cls._builtin_plugins = None
+        yield
+
 
 DEFAULT_ENVIRONMENT = Environment()
diff --git a/datumaro/components/lazy_plugin.py b/datumaro/components/lazy_plugin.py
new file mode 100644
index 0000000000..ff797443b7
--- /dev/null
+++ b/datumaro/components/lazy_plugin.py
@@ -0,0 +1,59 @@
+# Copyright (C) 2023 Intel Corporation
+#
+# SPDX-License-Identifier: MIT
+
+from abc import ABC, abstractclassmethod
+from importlib import import_module
+from typing import Type, Union, get_args
+
+from datumaro.components.dataset_base import DatasetBase
+from datumaro.components.exporter import Exporter
+from datumaro.components.generator import DatasetGenerator
+from datumaro.components.importer import Importer
+from datumaro.components.launcher import Launcher
+from datumaro.components.transformer import Transform
+from datumaro.components.validator import Validator
+
+# Transform should be in front of DatasetBase,
+# since Transform inherits DatasetBase.
+_PLUGIN_TYPES = Union[
+    Transform,
+    Exporter,
+    DatasetGenerator,
+    Importer,
+    Launcher,
+    Validator,
+    DatasetBase,
+]
+PLUGIN_TYPES = Type[_PLUGIN_TYPES]
+STR_TO_PLUGIN_TYPES = {t.__name__: t for t in get_args(_PLUGIN_TYPES)}
+
+
+class LazyPlugin(ABC):
+    NAME: str
+
+    @abstractclassmethod
+    def get_plugin_cls(cls) -> PLUGIN_TYPES:
+        pass
+
+
+def get_lazy_plugin(
+    import_path: str,
+    plugin_name: str,
+    plugin_type: str,
+) -> LazyPlugin:
+    plugin_type_cls = STR_TO_PLUGIN_TYPES[plugin_type]
+
+    class LazyPluginImpl(LazyPlugin, plugin_type_cls):
+        NAME = plugin_name
+
+        @classmethod
+        def get_plugin_cls(cls) -> PLUGIN_TYPES:
+            splits = import_path.split(".")
+            module_name = ".".join(splits[:-1])
+            class_name = splits[-1]
+            module = import_module(module_name)
+            plugin_cls = getattr(module, class_name)
+            return plugin_cls
+
+    return LazyPluginImpl
diff --git a/datumaro/plugins/specs.json b/datumaro/plugins/specs.json
new file mode 100644
index 0000000000..24430036f4
--- /dev/null
+++ b/datumaro/plugins/specs.json
@@ -0,0 +1 @@
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oco.importer.CocoCaptionsImporter","plugin_name":"coco_captions","plugin_type":"Importer"},{"import_path":"datumaro.plugins.data_formats.coco.importer.CocoImageInfoImporter","plugin_name":"coco_image_info","plugin_type":"Importer"},{"import_path":"datumaro.plugins.data_formats.coco.importer.CocoImporter","plugin_name":"coco","plugin_type":"Importer"},{"import_path":"datumaro.plugins.data_formats.coco.importer.CocoInstancesImporter","plugin_name":"coco_instances","plugin_type":"Importer"},{"import_path":"datumaro.plugins.data_formats.coco.importer.CocoLabelsImporter","plugin_name":"coco_labels","plugin_type":"Importer"},{"import_path":"datumaro.plugins.data_formats.coco.importer.CocoPanopticImporter","plugin_name":"coco_panoptic","plugin_type":"Importer"},{"import_path":"datumaro.plugins.data_formats.coco.importer.CocoPersonKeypointsImporter","plugin_name":"coco_person_keypoints","plugin_type":"Importer"},{"import_path":"datumaro.plugins.data_formats.coco.importer.CocoRoboflowImporter","plugin_name":"coco_roboflow","plugin_type":"Importer"},{"import_path":"datumaro.plugins.data_formats.coco.importer.CocoStuffImporter","plugin_name":"coco_stuff","plugin_type":"Importer"},{"import_path":"datumaro.plugins.data_formats.arrow.importer.ArrowImporter","plugin_name":"arrow","plugin_type":"Importer"},{"import_path":"datumaro.plugins.data_formats.synthia.importer.SynthiaAlImporter","plugin_name":"synthia_al","plugin_type":"Importer"},{"import_path":"datumaro.plugins.data_formats.synthia.importer.SynthiaRandImporter","plugin_name":"synthia_rand","plugin_type":"Importer"},{"import_path":"datumaro.plugins.data_formats.synthia.importer.SynthiaSfImporter","plugin_name":"synthia_sf","plugin_type":"Importer"},{"import_path":"datumaro.plugins.data_formats.mvtec.importer.MvtecClassificationImporter","plugin_name":"mvtec_classification","plugin_type":"Importer"},{"import_path":"datumaro.plugins.data_formats.mvtec.importer.MvtecDetectionImporter","plugin_name":"mvtec_detection","plugin_type":"Importer"},{"import_path":"datumaro.plugins.data_formats.mvtec.importer.MvtecImporter","plugin_name":"mvtec","plugin_type":"Importer"},{"import_path":"datumaro.plugins.data_formats.mvtec.importer.MvtecSegmentationImporter","plugin_name":"mvtec_segmentation","plugin_type":"Importer"},{"import_path":"datumaro.plugins.data_formats.cvat.base.CvatImporter","plugin_name":"cvat","plugin_type":"Importer"},{"import_path":"datumaro.plugins.data_formats.kitti_raw.base.KittiRawImporter","plugin_name":"kitti_raw","plugin_type":"Importer"},{"import_path":"datumaro.plugins.data_formats.tf_detection_api.base.TfDetectionApiImporter","plugin_name":"tf_detection_api","plugin_type":"Importer"},{"import_path":"datumaro.plugins.data_formats.datumaro.importer.DatumaroImporter","plugin_name":"datumaro","plugin_type":"Importer"},{"import_path":"datumaro.plugins.data_formats.kitti.importer.KittiDetectionImporter","plugin_name":"kitti_detection","plugin_type":"Importer"},{"import_path":"datumaro.plugins.data_formats.kitti.importer.KittiImporter","plugin_name":"kitti","plugin_type":"Importer"},{"import_path":"datumaro.plugins.data_formats.kitti.importer.KittiSegmentationImporter","plugin_name":"kitti_segmentation","plugin_type":"Importer"},{"import_path":"datumaro.plugins.data_formats.datumaro_binary.importer.DatumaroBinaryImporter","plugin_name":"datumaro_binary","plugin_type":"Importer"},{"import_path":"datumaro.plugins.data_formats.mapillary_vistas.importer.MapillaryVistasImporter","plugin_name":"mapillary_vistas","plugin_type":"Importer"},{"import_path":"datumaro.plugins.data_formats.mapillary_vistas.importer.MapillaryVistasInstancesImporter","plugin_name":"mapillary_vistas_instances","plugin_type":"Importer"},{"import_path":"datumaro.plugins.data_formats.mapillary_vistas.importer.MapillaryVistasPanopticImporter","plugin_name":"mapillary_vistas_panoptic","plugin_type":"Importer"},{"import_path":"datumaro.plugins.explorer.ExplorerLauncher","plugin_name":"explorer","plugin_type":"Launcher"},{"import_path":"datumaro.plugins.openvino_plugin.launcher.OpenvinoLauncher","plugin_name":"openvino","plugin_type":"Launcher"},{"import_path":"datumaro.plugins.shift_analyzer.ShiftAnalyzerLauncher","plugin_name":"shift_analyzer","plugin_type":"Launcher"},{"import_path":"datumaro.plugins.accuracy_checker_plugin.ac_launcher.AcLauncher","plugin_name":"ac","plugin_type":"Launcher"},{"import_path":"datumaro.plugins.data_formats.cityscapes.CityscapesExporter","plugin_name":"cityscapes","plugin_type":"Exporter"},{"import_path":"datumaro.plugins.data_formats.camvid.CamvidExporter","plugin_name":"camvid","plugin_type":"Exporter"},{"import_path":"datumaro.plugins.data_formats.image_dir.ImageDirExporter","plugin_name":"image_dir","plugin_type":"Exporter"},{"import_path":"datumaro.plugins.data_formats.lfw.LfwExporter","plugin_name":"lfw","plugin_type":"Exporter"},{"import_path":"datumaro.plugins.data_formats.imagenet_txt.ImagenetTxtExporter","plugin_name":"imagenet_txt","plugin_type":"Export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port_path":"datumaro.plugins.data_formats.mvtec.exporter.MvtecClassificationExporter","plugin_name":"mvtec_classification","plugin_type":"Exporter"},{"import_path":"datumaro.plugins.data_formats.mvtec.exporter.MvtecDetectionExporter","plugin_name":"mvtec_detection","plugin_type":"Exporter"},{"import_path":"datumaro.plugins.data_formats.mvtec.exporter.MvtecExporter","plugin_name":"mvtec","plugin_type":"Exporter"},{"import_path":"datumaro.plugins.data_formats.mvtec.exporter.MvtecSegmentationExporter","plugin_name":"mvtec_segmentation","plugin_type":"Exporter"},{"import_path":"datumaro.plugins.data_formats.cvat.exporter.CvatExporter","plugin_name":"cvat","plugin_type":"Exporter"},{"import_path":"datumaro.plugins.data_formats.kitti_raw.exporter.KittiRawExporter","plugin_name":"kitti_raw","plugin_type":"Exporter"},{"import_path":"datumaro.plugins.data_formats.tf_detection_api.exporter.TfDetectionApiExporter","plugin_name":"tf_detection_api","plugin_type":"Exporter"},{"import_path":"datumaro.plugins.data_formats.datumaro.exporter.DatumaroExporter","plugin_name":"datumaro","plugin_type":"Exporter"},{"import_path":"datumaro.plugins.data_formats.kitti.exporter.KittiDetectionExporter","plugin_name":"kitti_detection","plugin_type":"Exporter"},{"import_path":"datumaro.plugins.data_formats.kitti.exporter.KittiExporter","plugin_name":"kitti","plugin_type":"Exporter"},{"import_path":"datumaro.plugins.data_formats.kitti.exporter.KittiSegmentationExporter","plugin_name":"kitti_segmentation","plugin_type":"Exporter"},{"import_path":"datumaro.plugins.data_formats.datumaro_binary.exporter.DatumaroBinaryExporter","plugin_name":"datumaro_binary","plugin_type":"Exporter"},{"import_path":"datumaro.plugins.transforms.AnnsToLabels","plugin_name":"anns_to_labels","plugin_type":"Transform"},{"import_path":"datumaro.plugins.transforms.BboxValuesDecrement","plugin_name":"bbox_values_decrement","plugin_type":"Transform"},{"import_path":"datumaro.plugins.transforms.BoxesToMasks","plugin_name":"boxes_to_masks","plugin_type":"Transform"},{"import_path":"datumaro.plugins.transforms.Correct","plugin_name":"correct","plugin_type":"Transform"},{"import_path":"datumaro.plugins.transforms.CropCoveredSegments","plugin_name":"crop_covered_segments","plugin_type":"Transform"},{"import_path":"datumaro.plugins.transforms.IdFromImageName","plugin_name":"id_from_image_name","plugin_type":"Transform"},{"import_path":"datumaro.plugins.transforms.MapSubsets","plugin_name":"map_subsets","plugin_type":"Transform"},{"import_path":"datumaro.plugins.transforms.MasksToPolygons","plugin_name":"masks_to_polygons","plugin_type":"Transform"},{"import_path":"datumaro.plugins.transforms.MergeInstanceSegments","plugin_name":"merge_instance_segments","plugin_type":"Transform"},{"import_path":"datumaro.plugins.transforms.PolygonsToMasks","plugin_name":"polygons_to_masks","plugin_type":"Transform"},{"import_path":"datumaro.plugins.transforms.ProjectInfos","plugin_name":"project_infos","plugin_type":"Transform"},{"import_path":"datumaro.plugins.transforms.ProjectLabels","plugin_name":"project_labels","plugin_type":"Transform"},{"import_path":"datumaro.plugins.transforms.RandomSplit","plugin_name":"random_split","plugin_type":"Transform"},{"import_path":"datumaro.plugins.transforms.Reindex","plugin_name":"reindex","plugin_type":"Transform"},{"import_path":"datumaro.plugins.transforms.ReindexAnnotations","plugin_name":"reindex_annotations","plugin_type":"Transform"},{"import_path":"datumaro.plugins.transforms.RemapLabels","plugin_name":"remap_labels","plugin_type":"Transform"},{"import_path":"datumaro.plugins.transforms.RemoveAnnotations","plugin_name":"remove_annotations","plugin_type":"Transform"},{"import_path":"datumaro.plugins.transforms.RemoveAttributes","plugin_name":"remove_attributes","plugin_type":"Transform"},{"import_path":"datumaro.plugins.transforms.RemoveItems","plugin_name":"remove_items","plugin_type":"Transform"},{"import_path":"datumaro.plugins.transforms.Rename","plugin_name":"rename","plugin_type":"Transform"},{"import_path":"datumaro.plugins.transforms.ResizeTransform","plugin_name":"resize","plugin_type":"Transform"},{"import_path":"datumaro.plugins.transforms.ShapesToBoxes","plugin_name":"shapes_to_boxes","plugin_type":"Transform"},{"import_path":"datumaro.plugins.transforms.Sort","plugin_name":"sort","plugin_type":"Transform"},{"import_path":"datumaro.plugins.splitter.Split","plugin_name":"split","plugin_type":"Transform"},{"import_path":"datumaro.plugins.ndr.NDR","plugin_name":"ndr","plugin_type":"Transform"},{"import_path":"datumaro.plugins.tiling.tile.Tile","plugin_name":"tile","plugin_type":"Transform"},{"import_path":"datumaro.plugins.tiling.merge_tile.MergeTile","plugin_name":"merge_tile","plugin_type":"Transform"},{"import_path":"datumaro.plugins.sampler.random_sampler.LabelRandomSampler","plugin_name":"label_random_sampler","plugin_type":"Transform"},{"import_path":"datumaro.plugins.sampler.random_sampler.RandomSampler","plugin_name":"random_sampler","plugin_type":"Transform"},{"import_path":"datumaro.plugins.sampler.relevancy_sampler.RelevancySampler","plugin_name":"relevancy_sampler","plugin_type":"Transform"},{"import_path":"datumaro.plugins.validators.ClassificationValidator","plugin_name":"classification","plugin_type":"Validator"},{"import_path":"datumaro.plugins.validators.DetectionValidator","plugin_name":"detection","plugin_type":"Validator"},{"import_path":"datumaro.plugins.validators.SegmentationValidator","plugin_name":"segmentation","plugin_type":"Validator"}]
diff --git a/datumaro/plugins/specs.py b/datumaro/plugins/specs.py
new file mode 100644
index 0000000000..cb707e8e23
--- /dev/null
+++ b/datumaro/plugins/specs.py
@@ -0,0 +1,49 @@
+# Copyright (C) 2023 Intel Corporation
+#
+# SPDX-License-Identifier: MIT
+
+from pathlib import Path
+
+from datumaro.components.lazy_plugin import get_lazy_plugin
+from datumaro.util import parse_json_file
+
+_SOURCE_PATH = Path(__file__).resolve()
+_SOURCE_DIR = _SOURCE_PATH.parent
+_SPECS_JSON_PATH = _SOURCE_DIR / "specs.json"
+
+LAZY_PLUGINS = [
+    get_lazy_plugin(spec["import_path"], spec["plugin_name"], spec["plugin_type"])
+    for spec in parse_json_file(str(_SPECS_JSON_PATH))
+]
+
+if __name__ == "__main__":
+    from datumaro.components.environment import Environment
+    from datumaro.util import dump_json_file
+
+    env = Environment(use_lazy_import=False)
+    plugin_specs = []
+
+    def _enroll_to_plugin_specs(plugins, plugin_type):
+        global plugin_specs
+
+        for _, plugin in plugins.items():
+            mod = plugin.__module__
+            class_name = plugin.__name__
+            plugin_name = plugin.NAME
+            plugin_specs += [
+                {
+                    "import_path": f"{mod}.{class_name}",
+                    "plugin_name": plugin_name,
+                    "plugin_type": plugin_type,
+                }
+            ]
+
+    _enroll_to_plugin_specs(env.extractors, "DatasetBase")
+    _enroll_to_plugin_specs(env.importers, "Importer")
+    _enroll_to_plugin_specs(env.launchers, "Launcher")
+    _enroll_to_plugin_specs(env.exporters, "Exporter")
+    _enroll_to_plugin_specs(env.generators, "DatasetGenerator")
+    _enroll_to_plugin_specs(env.transforms, "Transform")
+    _enroll_to_plugin_specs(env.validators, "Validator")
+
+    dump_json_file(_SPECS_JSON_PATH, plugin_specs)
diff --git a/tests/unit/test_dataset.py b/tests/unit/test_dataset.py
index a72dd180ed..d07837c83a 100644
--- a/tests/unit/test_dataset.py
+++ b/tests/unit/test_dataset.py
@@ -227,8 +227,8 @@ def test_can_save_and_load(self):
     @mark_requirement(Requirements.DATUM_GENERAL_REQ)
     def test_can_detect(self):
         env = Environment()
-        env.importers.items = {DEFAULT_FORMAT: env.importers[DEFAULT_FORMAT]}
-        env.extractors.items = {DEFAULT_FORMAT: env.extractors[DEFAULT_FORMAT]}
+        env.importers._items = {DEFAULT_FORMAT: env.importers[DEFAULT_FORMAT]}
+        env.extractors._items = {DEFAULT_FORMAT: env.extractors[DEFAULT_FORMAT]}
 
         dataset = Dataset.from_iterable(
             [
@@ -247,8 +247,8 @@ def test_can_detect(self):
     @mark_requirement(Requirements.DATUM_GENERAL_REQ)
     def test_can_detect_with_nested_folder(self):
         env = Environment()
-        env.importers.items = {DEFAULT_FORMAT: env.importers[DEFAULT_FORMAT]}
-        env.extractors.items = {DEFAULT_FORMAT: env.extractors[DEFAULT_FORMAT]}
+        env.importers._items = {DEFAULT_FORMAT: env.importers[DEFAULT_FORMAT]}
+        env.extractors._items = {DEFAULT_FORMAT: env.extractors[DEFAULT_FORMAT]}
 
         dataset = Dataset.from_iterable(
             [
@@ -295,8 +295,8 @@ def test_cannot_detect_for_non_existent_path(self):
     @mark_requirement(Requirements.DATUM_GENERAL_REQ)
     def test_can_detect_and_import(self):
         env = Environment()
-        env.importers.items = {DEFAULT_FORMAT: env.importers[DEFAULT_FORMAT]}
-        env.extractors.items = {DEFAULT_FORMAT: env.extractors[DEFAULT_FORMAT]}
+        env.importers._items = {DEFAULT_FORMAT: env.importers[DEFAULT_FORMAT]}
+        env.extractors._items = {DEFAULT_FORMAT: env.extractors[DEFAULT_FORMAT]}
 
         source_dataset = Dataset.from_iterable(
             [
@@ -317,10 +317,10 @@ def test_can_detect_and_import(self):
     @mark_requirement(Requirements.DATUM_GENERAL_REQ)
     def test_can_report_no_dataset_found(self):
         env = Environment()
-        env.importers.items = {
+        env.importers._items = {
             DEFAULT_FORMAT: env.importers[DEFAULT_FORMAT],
         }
-        env.extractors.items = {
+        env.extractors._items = {
             DEFAULT_FORMAT: env.extractors[DEFAULT_FORMAT],
         }
 
@@ -330,11 +330,11 @@ def test_can_report_no_dataset_found(self):
     @mark_requirement(Requirements.DATUM_GENERAL_REQ)
     def test_can_report_multiple_formats_match(self):
         env = Environment()
-        env.importers.items = {
+        env.importers._items = {
             "a": env.importers[DEFAULT_FORMAT],
             "b": env.importers[DEFAULT_FORMAT],
         }
-        env.extractors.items = {
+        env.extractors._items = {
             "a": env.extractors[DEFAULT_FORMAT],
             "b": env.extractors[DEFAULT_FORMAT],
         }
@@ -355,8 +355,8 @@ def test_can_report_multiple_formats_match(self):
     @mark_requirement(Requirements.DATUM_GENERAL_REQ)
     def test_can_report_no_matching_formats(self):
         env = Environment()
-        env.importers.items = {}
-        env.extractors.items = {}
+        env.importers._items = {}
+        env.extractors._items = {}
 
         source_dataset = Dataset.from_iterable(
             [
@@ -374,8 +374,8 @@ def test_can_report_no_matching_formats(self):
     @mark_requirement(Requirements.DATUM_GENERAL_REQ)
     def test_can_report_unknown_format_requested(self):
         env = Environment()
-        env.importers.items = {}
-        env.extractors.items = {}
+        env.importers._items = {}
+        env.extractors._items = {}
 
         source_dataset = Dataset.from_iterable(
             [
@@ -393,7 +393,7 @@ def test_can_report_unknown_format_requested(self):
     @mark_requirement(Requirements.DATUM_GENERAL_REQ)
     def test_can_export_by_string_format_name(self):
         env = Environment()
-        env.exporters.items = {"qq": env.exporters[DEFAULT_FORMAT]}
+        env.exporters._items = {"qq": env.exporters[DEFAULT_FORMAT]}
 
         dataset = Dataset.from_iterable(
             [
@@ -1623,7 +1623,7 @@ def _apply_impl(self):
                         self._save_image(item, name=name)
 
         env = Environment()
-        env.exporters.items = {"test": CustomExporter}
+        env.exporters._items = {"test": CustomExporter}
 
         with TestDir() as path:
             dataset = Dataset.from_iterable(
@@ -1759,8 +1759,8 @@ def __iter__(self):
                 yield DatasetItem("1")
 
         env = Environment()
-        env.importers.items.clear()
-        env.extractors.items["test"] = TestExtractor
+        env.importers._items.clear()
+        env.extractors._items["test"] = TestExtractor
 
         dataset = Dataset.import_from("", "test", env=env, progress_reporter=NullProgressReporter())
 
@@ -1776,8 +1776,8 @@ def __iter__(self):
                 yield DatasetItem("1")
 
         env = Environment()
-        env.importers.items.clear()
-        env.extractors.items["test"] = TestExtractor
+        env.importers._items.clear()
+        env.extractors._items["test"] = TestExtractor
 
         dataset = Dataset.import_from("", "test", env=env, error_policy=FailingImportErrorPolicy())
 
@@ -1805,8 +1805,8 @@ def split(self, count):
         progress_reporter.finish = mock.MagicMock()
 
         env = Environment()
-        env.importers.items.clear()
-        env.extractors.items["test"] = TestExtractor
+        env.importers._items.clear()
+        env.extractors._items["test"] = TestExtractor
 
         Dataset.import_from("", "test", env=env, progress_reporter=progress_reporter)
 
@@ -1843,8 +1843,8 @@ def split(self, count):
         )
 
         env = Environment()
-        env.importers.items.clear()
-        env.extractors.items["test"] = TestExtractor
+        env.importers._items.clear()
+        env.extractors._items["test"] = TestExtractor
 
         Dataset.import_from("", "test", env=env, progress_reporter=progress_reporter)
 
@@ -1865,8 +1865,8 @@ class TestError(Exception):
                 yield from []
 
         env = Environment()
-        env.importers.items.clear()
-        env.extractors.items["test"] = TestExtractor
+        env.importers._items.clear()
+        env.extractors._items["test"] = TestExtractor
 
         class TestErrorPolicy(ImportErrorPolicy):
             pass
diff --git a/tests/unit/test_environment.py b/tests/unit/test_environment.py
new file mode 100644
index 0000000000..27f1ce353f
--- /dev/null
+++ b/tests/unit/test_environment.py
@@ -0,0 +1,32 @@
+# Copyright (C) 2019-2023 Intel Corporation
+#
+# SPDX-License-Identifier: MIT
+
+import pytest
+
+from datumaro.components.environment import Environment
+
+
+class EnvironmentTest:
+    @pytest.fixture
+    def fxt_lazy_import(self):
+        with Environment.release_builtin_plugins():
+            env = Environment(use_lazy_import=True)
+            _ = env.importers
+            yield env
+
+    @pytest.fixture
+    def fxt_no_lazy_import(self):
+        with Environment.release_builtin_plugins():
+            env = Environment(use_lazy_import=False)
+            _ = env.importers
+            yield env
+
+    def test_equivalance(self, fxt_lazy_import: Environment, fxt_no_lazy_import: Environment):
+        assert sorted(fxt_lazy_import.extractors) == sorted(fxt_no_lazy_import.extractors)
+        assert sorted(fxt_lazy_import.importers) == sorted(fxt_no_lazy_import.importers)
+        assert sorted(fxt_lazy_import.launchers) == sorted(fxt_no_lazy_import.launchers)
+        assert sorted(fxt_lazy_import.exporters) == sorted(fxt_no_lazy_import.exporters)
+        assert sorted(fxt_lazy_import.generators) == sorted(fxt_no_lazy_import.generators)
+        assert sorted(fxt_lazy_import.transforms) == sorted(fxt_no_lazy_import.transforms)
+        assert sorted(fxt_lazy_import.validators) == sorted(fxt_no_lazy_import.validators)
diff --git a/tests/unit/test_validator.py b/tests/unit/test_validator.py
index a387ae2116..ca43a5e4f4 100644
--- a/tests/unit/test_validator.py
+++ b/tests/unit/test_validator.py
@@ -376,7 +376,7 @@ def setUpClass(cls):
     def test_has_enum_entries_in_environment(self):
         env = Environment()
         for key in TaskType.__members__:
-            self.assertIn(key, env.validators.items)
+            self.assertIn(key, env.validators._items)
 
     @mark_requirement(Requirements.DATUM_GENERAL_REQ)
     def test_generate_reports(self):

From 48aeb648cc031d105052e20681e359f9bd28798a Mon Sep 17 00:00:00 2001
From: "Kim, Vinnam" <vinnam.kim@intel.com>
Date: Tue, 30 May 2023 18:11:37 +0900
Subject: [PATCH 03/10] Add datumaro/plugins/README.md

Signed-off-by: Kim, Vinnam <vinnam.kim@intel.com>
---
 datumaro/plugins/README.md | 11 +++++++++++
 1 file changed, 11 insertions(+)
 create mode 100644 datumaro/plugins/README.md

diff --git a/datumaro/plugins/README.md b/datumaro/plugins/README.md
new file mode 100644
index 0000000000..dc4d182ea1
--- /dev/null
+++ b/datumaro/plugins/README.md
@@ -0,0 +1,11 @@
+# Add a new builtin plugin
+
+If you are adding a new builtin plugin under `./datumaro/plugins/`, you have to enroll it to `./datumaro/plugins/specs.json` for the lazy import.
+Otherwise, you will be failed in this test (`tests/unit/test_environment.py`).
+You can enroll your plugin to `./datumaro/plugins/specs.json` with Python executable script as follows.
+
+```console
+python datumaro/plugins/specs.py
+```
+
+> **_NOTE:_**  It is not recommended to mannually modify `./datumaro/plugins/specs.json` by hands. Please use the above Python executable script.

From 4514394dcc362c065ed3f1df3d9553f6d9fbe766 Mon Sep 17 00:00:00 2001
From: "Kim, Vinnam" <vinnam.kim@intel.com>
Date: Tue, 30 May 2023 18:22:09 +0900
Subject: [PATCH 04/10] Update CHANGELOG.md

Signed-off-by: Kim, Vinnam <vinnam.kim@intel.com>
---
 CHANGELOG.md | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 12c1c9d5b4..bac4f7ba25 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,11 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## \[Unreleased\]
+### New features
+### Enhancements
+- Enhance import performance for built-in plugins
+  (<https://github.com/openvinotoolkit/datumaro/pull/1031>)
+### Bug fixes
 
 ## 26/05/2023 - Release 1.3.1
 ### Bug fixes

From e41ed737d4680f798f7beffac9a4dc6642418f26 Mon Sep 17 00:00:00 2001
From: "Kim, Vinnam" <vinnam.kim@intel.com>
Date: Tue, 30 May 2023 18:43:34 +0900
Subject: [PATCH 05/10] Update MANIFEST.in

Signed-off-by: Kim, Vinnam <vinnam.kim@intel.com>
---
 MANIFEST.in | 1 +
 1 file changed, 1 insertion(+)

diff --git a/MANIFEST.in b/MANIFEST.in
index b8c194ac1c..2cf27f7bb5 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -2,3 +2,4 @@ include README.md
 include requirements-core.txt
 include requirements-default.txt
 include 3rd-party.txt
+include datumaro/plugins/specs.json

From 6e6d1d616d77696eee37c2b1222d5e05256eb7f8 Mon Sep 17 00:00:00 2001
From: "Kim, Vinnam" <vinnam.kim@intel.com>
Date: Tue, 30 May 2023 21:25:55 +0900
Subject: [PATCH 06/10] Add openvino-dev to default extra deps and update
 contributing.md

Signed-off-by: Kim, Vinnam <vinnam.kim@intel.com>
---
 contributing.md          | 15 ++++++++-------
 requirements-default.txt |  1 +
 2 files changed, 9 insertions(+), 7 deletions(-)

diff --git a/contributing.md b/contributing.md
index 1af2c2269d..4c660c7637 100644
--- a/contributing.md
+++ b/contributing.md
@@ -5,7 +5,7 @@
 - [Design document](https://openvinotoolkit.github.io/datumaro/latest/docs/explanation/architecture)
 - [Developer manual](https://openvinotoolkit.github.io/datumaro/latest/docs/reference/datumaro_module)
 
-## Installation
+## Installation for developer
 
 ### Prerequisites
 
@@ -23,20 +23,21 @@ python -m virtualenv venv
 . venv/bin/activate
 ```
 
-Then install all dependencies:
-
+Install Datumaro with optional dependencies:
 ``` bash
-pip install -r requirements.txt
+cd /path/to/the/cloned/repo/
+pip install -e .[default, tf]
 ```
 
-Install Datumaro:
+Then install test dependencies:
+
 ``` bash
-pip install -e /path/to/the/cloned/repo/
+pip install -r tests/requirements.txt
 ```
 
 **Optional dependencies**
 
-These components are only required for plugins and not installed by default:
+Developer should install the following optional components for running our tests:
 
 - OpenVINO
 - Accuracy Checker
diff --git a/requirements-default.txt b/requirements-default.txt
index ba094413bd..e52519199e 100644
--- a/requirements-default.txt
+++ b/requirements-default.txt
@@ -2,3 +2,4 @@ dvc>=2.7.0
 fsspec <= 2022.11.0; python_version < '3.8' # https://github.com/openvinotoolkit/datumaro/actions/runs/4003215621/jobs/6871114851#step:5:1647
 GitPython>=3.1.18,!=3.1.25 # https://github.com/openvinotoolkit/datumaro/issues/612
 openvino-telemetry>=2022.1.0
+openvino-dev==2022.3.0

From d8f1fd0055fead402d7dde7a5000fa9271b165cb Mon Sep 17 00:00:00 2001
From: "Kim, Vinnam" <vinnam.kim@intel.com>
Date: Wed, 31 May 2023 16:14:41 +0900
Subject: [PATCH 07/10] Add extra_deps mechanism to lazy plugin import

Signed-off-by: Kim, Vinnam <vinnam.kim@intel.com>
---
 datumaro/components/lazy_plugin.py            | 40 ++++++++++++++++++-
 datumaro/plugins/README.md                    | 20 +++++++++-
 .../accuracy_checker_plugin/ac_launcher.py    |  2 +
 .../data_formats/tf_detection_api/base.py     |  3 ++
 .../data_formats/tf_detection_api/exporter.py |  2 +
 datumaro/plugins/specs.json                   |  2 +-
 datumaro/plugins/specs.py                     | 13 ++++--
 tests/unit/test_environment.py                | 27 +++++++++++++
 8 files changed, 102 insertions(+), 7 deletions(-)

diff --git a/datumaro/components/lazy_plugin.py b/datumaro/components/lazy_plugin.py
index ff797443b7..1a01939b27 100644
--- a/datumaro/components/lazy_plugin.py
+++ b/datumaro/components/lazy_plugin.py
@@ -4,9 +4,10 @@
 
 from abc import ABC, abstractclassmethod
 from importlib import import_module
-from typing import Type, Union, get_args
+from typing import List, Optional, Sequence, Type, Union, get_args
 
 from datumaro.components.dataset_base import DatasetBase
+from datumaro.components.errors import DatumaroError
 from datumaro.components.exporter import Exporter
 from datumaro.components.generator import DatasetGenerator
 from datumaro.components.importer import Importer
@@ -27,6 +28,7 @@
 ]
 PLUGIN_TYPES = Type[_PLUGIN_TYPES]
 STR_TO_PLUGIN_TYPES = {t.__name__: t for t in get_args(_PLUGIN_TYPES)}
+_EXTRA_DEPS_ATTR_NAME = "__extra_deps__"
 
 
 class LazyPlugin(ABC):
@@ -41,7 +43,14 @@ def get_lazy_plugin(
     import_path: str,
     plugin_name: str,
     plugin_type: str,
-) -> LazyPlugin:
+    extra_deps: List[str] = [],
+) -> Optional[LazyPlugin]:
+    try:
+        for extra_dep in extra_deps:
+            import_module(extra_dep)
+    except ImportError:
+        return None
+
     plugin_type_cls = STR_TO_PLUGIN_TYPES[plugin_type]
 
     class LazyPluginImpl(LazyPlugin, plugin_type_cls):
@@ -57,3 +66,30 @@ def get_plugin_cls(cls) -> PLUGIN_TYPES:
             return plugin_cls
 
     return LazyPluginImpl
+
+
+def extra_deps(*extra_dep_names: Sequence[str]):
+    """Decorator to assign extra deps for the plugin class.
+
+    There exist some plugins that cannot be executable with the default installation setup.
+    For example, `AcLauncher` plugin needs `tensorflow` and `openvino.tools` extra dependencies.
+    In this case, you have to add this decorator to that plugin class definition as follows.
+
+    @extra_deps("tensorflow", "openvino.tools")
+    class AcLauncher(Launcher, CliPlugin):
+    ...
+    """
+
+    def inner(plugin_cls: object):
+        if hasattr(plugin_cls, _EXTRA_DEPS_ATTR_NAME):
+            raise DatumaroError(f"It already has {_EXTRA_DEPS_ATTR_NAME} attribute!")
+
+        setattr(plugin_cls, _EXTRA_DEPS_ATTR_NAME, list(extra_dep_names))
+        return plugin_cls
+
+    return inner
+
+
+def get_extra_deps(plugin_cls: object) -> List[str]:
+    """Get extra deps of the given plugin class. If not exists, return an empty list."""
+    return getattr(plugin_cls, _EXTRA_DEPS_ATTR_NAME, [])
diff --git a/datumaro/plugins/README.md b/datumaro/plugins/README.md
index dc4d182ea1..7a4311bd44 100644
--- a/datumaro/plugins/README.md
+++ b/datumaro/plugins/README.md
@@ -1,5 +1,6 @@
-# Add a new builtin plugin
+# How to develop a new builtin plugin
 
+## Enroll a new builtin plugin
 If you are adding a new builtin plugin under `./datumaro/plugins/`, you have to enroll it to `./datumaro/plugins/specs.json` for the lazy import.
 Otherwise, you will be failed in this test (`tests/unit/test_environment.py`).
 You can enroll your plugin to `./datumaro/plugins/specs.json` with Python executable script as follows.
@@ -9,3 +10,20 @@ python datumaro/plugins/specs.py
 ```
 
 > **_NOTE:_**  It is not recommended to mannually modify `./datumaro/plugins/specs.json` by hands. Please use the above Python executable script.
+
+## (Additional) Specify extra dependencies to plugin class
+
+If you are trying to add a new builtin plugin that has dependencies which is not installed together by default when installing datumaro.
+You need to add Python decorator to specify extra deps for the plugin class definition.
+This is required during the built-in plugin registration step to determine if a plugin is available by checking if its dependencies are installed on the system.
+
+For example, `AcLauncher` plugin needs `tensorflow` and `openvino.tools` extra dependencies.
+Therefore, it added `@extra_deps("tensorflow", "openvino.tools")` to its class definition as follows.
+
+```python
+from datumaro.components.lazy_plugin import extra_deps
+
+@extra_deps("tensorflow", "openvino.tools")
+class AcLauncher(Launcher, CliPlugin):
+    ...
+```
diff --git a/datumaro/plugins/accuracy_checker_plugin/ac_launcher.py b/datumaro/plugins/accuracy_checker_plugin/ac_launcher.py
index 4ae32bbcf7..6d4bc97377 100644
--- a/datumaro/plugins/accuracy_checker_plugin/ac_launcher.py
+++ b/datumaro/plugins/accuracy_checker_plugin/ac_launcher.py
@@ -8,10 +8,12 @@
 
 from datumaro.components.cli_plugin import CliPlugin
 from datumaro.components.launcher import Launcher
+from datumaro.components.lazy_plugin import extra_deps
 
 from .details.ac import GenericAcLauncher as _GenericAcLauncher
 
 
+@extra_deps("openvino.tools", "tensorflow")
 class AcLauncher(Launcher, CliPlugin):
     """
     Generic model launcher with Accuracy Checker backend.
diff --git a/datumaro/plugins/data_formats/tf_detection_api/base.py b/datumaro/plugins/data_formats/tf_detection_api/base.py
index 3409796013..ae48997e1e 100644
--- a/datumaro/plugins/data_formats/tf_detection_api/base.py
+++ b/datumaro/plugins/data_formats/tf_detection_api/base.py
@@ -12,6 +12,7 @@
 from datumaro.components.annotation import AnnotationType, Bbox, LabelCategories, Mask
 from datumaro.components.dataset_base import DatasetItem, SubsetBase
 from datumaro.components.importer import ImportContext, Importer
+from datumaro.components.lazy_plugin import extra_deps
 from datumaro.components.media import Image
 from datumaro.util.image import decode_image, lazy_image
 from datumaro.util.tf_util import import_tf as _import_tf
@@ -25,6 +26,7 @@ def clamp(value, _min, _max):
     return max(min(_max, value), _min)
 
 
+@extra_deps("tensorflow")
 class TfDetectionApiBase(SubsetBase):
     def __init__(
         self,
@@ -185,6 +187,7 @@ def _parse_tfrecord_file(cls, filepath, subset, images_dir):
         return dataset_items, dataset_labels
 
 
+@extra_deps("tensorflow")
 class TfDetectionApiImporter(Importer):
     @classmethod
     def find_sources(cls, path):
diff --git a/datumaro/plugins/data_formats/tf_detection_api/exporter.py b/datumaro/plugins/data_formats/tf_detection_api/exporter.py
index f0383bdf7b..fa48f49bff 100644
--- a/datumaro/plugins/data_formats/tf_detection_api/exporter.py
+++ b/datumaro/plugins/data_formats/tf_detection_api/exporter.py
@@ -13,6 +13,7 @@
 from datumaro.components.annotation import AnnotationType, LabelCategories
 from datumaro.components.errors import DatasetExportError
 from datumaro.components.exporter import Exporter
+from datumaro.components.lazy_plugin import extra_deps
 from datumaro.components.media import ByteImage, Image, ImageFromBytes
 from datumaro.util.annotation_util import find_group_leader, find_instances, max_bbox
 from datumaro.util.image import encode_image
@@ -52,6 +53,7 @@ def float_list_feature(value):
     return tf.train.Feature(float_list=tf.train.FloatList(value=value))
 
 
+@extra_deps("tensorflow")
 class TfDetectionApiExporter(Exporter):
     DEFAULT_IMAGE_EXT = DetectionApiPath.DEFAULT_IMAGE_EXT
 
diff --git a/datumaro/plugins/specs.json b/datumaro/plugins/specs.json
index 24430036f4..8f1f1c888f 100644
--- a/datumaro/plugins/specs.json
+++ b/datumaro/plugins/specs.json
@@ -1 +1 @@
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nything.exporter.SegmentAnythingExporter","plugin_name":"segment_anything","plugin_type":"Exporter","extra_deps":[]},{"import_path":"datumaro.plugins.data_formats.sly_pointcloud.exporter.SuperviselyPointCloudExporter","plugin_name":"sly_pointcloud","plugin_type":"Exporter","extra_deps":[]},{"import_path":"datumaro.plugins.data_formats.icdar.exporter.IcdarTextLocalizationExporter","plugin_name":"icdar_text_localization","plugin_type":"Exporter","extra_deps":[]},{"import_path":"datumaro.plugins.data_formats.icdar.exporter.IcdarTextSegmentationExporter","plugin_name":"icdar_text_segmentation","plugin_type":"Exporter","extra_deps":[]},{"import_path":"datumaro.plugins.data_formats.icdar.exporter.IcdarWordRecognitionExporter","plugin_name":"icdar_word_recognition","plugin_type":"Exporter","extra_deps":[]},{"import_path":"datumaro.plugins.data_formats.yolo.exporter.YoloExporter","plugin_name":"yolo","plugin_type":"Exporter","extra_deps":[]},{"import_path":"datumaro.plugins.data_formats.yolo.exporter.YoloUltralyticsExporter","plugin_name":"yolo_ultralytics","plugin_type":"Exporter","extra_deps":[]},{"import_path":"datumaro.plugins.data_formats.ava.ava.AvaExporter","plugin_name":"ava","plugin_type":"Exporter","extra_deps":[]},{"import_path":"datumaro.plugins.data_formats.voc.exporter.VocActionExporter","plugin_name":"voc_action","plugin_type":"Exporter","extra_deps":[]},{"import_path":"datumaro.plugins.data_formats.voc.exporter.VocClassificationExporter","plugin_name":"voc_classification","plugin_type":"Exporter","extra_deps":[]},{"import_path":"datumaro.plugins.data_formats.voc.exporter.VocDetectionExporter","plugin_name":"voc_detection","plugin_type":"Exporter","extra_deps":[]},{"import_path":"datumaro.plugins.data_formats.voc.exporter.VocExporter","plugin_name":"voc","plugin_type":"Exporter","extra_deps":[]},{"import_path":"datumaro.plugins.data_formats.voc.exporter.VocInstanceSegmentationExporter","plugin_name":"voc_instance_segmentation","plugin_type":"Exporter","extra_deps":[]},{"import_path":"datumaro.plugins.data_formats.voc.exporter.VocLayoutExporter","plugin_name":"voc_layout","plugin_type":"Exporter","extra_deps":[]},{"import_path":"datumaro.plugins.data_formats.voc.exporter.VocSegmentationExporter","plugin_name":"voc_segmentation","plugin_type":"Exporter","extra_deps":[]},{"import_path":"datumaro.plugins.data_formats.coco.exporter.CocoCaptionsExporter","plugin_name":"coco_captions","plugin_type":"Exporter","extra_deps":[]},{"import_path":"datumaro.plugins.data_formats.coco.exporter.CocoExporter","plugin_name":"coco","plugin_type":"Exporter","extra_deps":[]},{"import_path":"datumaro.plugins.data_formats.coco.exporter.CocoImageInfoExporter","plugin_name":"coco_image_info","plugin_type":"Exporter","extra_deps":[]},{"import_path":"datumaro.plugins.data_formats.coco.exporter.CocoInstancesExporter","plugin_name":"coco_instances","plugin_type":"Exporter","extra_deps":[]},{"import_path":"datumaro.plugins.data_formats.coco.exporter.CocoLabelsExporter","plugin_name":"coco_labels","plugin_type":"Exporter","extra_deps":[]},{"import_path":"datumaro.plugins.data_formats.coco.exporter.CocoPanopticExporter","plugin_name":"coco_panoptic","plugin_type":"Exporter","extra_deps":[]},{"import_path":"datumaro.plugins.data_formats.coco.exporter.CocoPersonKeypointsExporter","plugin_name":"coco_person_keypoints","plugin_type":"Exporter","extra_deps":[]},{"import_path":"datumaro.plugins.data_formats.coco.exporter.CocoStuffExporter","plugin_name":"coco_stuff","plugin_type":"Exporter","extra_deps":[]},{"import_path":"datumaro.plugins.data_formats.arrow.exporter.ArrowExporter","plugin_name":"arrow","plugin_type":"Exporter","extra_deps":[]},{"import_path":"datumaro.plugins.data_formats.mvtec.exporter.MvtecClassificationExporter","plugin_name":"mvtec_classification","plugin_type":"Exporter","extra_deps":[]},{"import_path":"datumaro.plugins.data_formats.mvtec.exporter.MvtecDetectionExporter","plugin_name":"mvtec_detection","plugin_type":"Exporter","extra_deps":[]},{"import_path":"datumaro.plugins.data_formats.mvtec.exporter.MvtecExporter","plugin_name":"mvtec","plugin_type":"Exporter","extra_deps":[]},{"import_path":"datumaro.plugins.data_formats.mvtec.exporter.MvtecSegmentationExporter","plugin_name":"mvtec_segmentation","plugin_type":"Exporter","extra_deps":[]},{"import_path":"datumaro.plugins.data_formats.cvat.exporter.CvatExporter","plugin_name":"cvat","plugin_type":"Exporter","extra_deps":[]},{"import_path":"datumaro.plugins.data_formats.kitti_raw.exporter.KittiRawExporter","plugin_name":"kitti_raw","plugin_type":"Exporter","extra_deps":[]},{"import_path":"datumaro.plugins.data_formats.tf_detection_api.exporter.TfDetectionApiExporter","plugin_name":"tf_detection_api","plugin_type":"Exporter","extra_deps":["tensorflow"]},{"import_path":"datumaro.plugins.data_formats.datumaro.exporter.DatumaroExporter","plugin_name":"datumaro","plugin_type":"Exporter","extra_deps":[]},{"import_path":"datumaro.plugins.data_formats.kitti.exporter.KittiDetectionExporter","plugin_name":"kitti_detection","plugin_type":"Exporter","extra_deps":[]},{"import_path":"datumaro.plugins.data_formats.kitti.exporter.KittiExporter","plugin_name":"kitti","plugin_type":"Exporter","extra_deps":[]},{"import_path":"datumaro.plugins.data_formats.kitti.exporter.KittiSegmentationExporter","plugin_name":"kitti_segmentation","plugin_type":"Exporter","extra_deps":[]},{"import_path":"datumaro.plugins.data_formats.datumaro_binary.exporter.DatumaroBinaryExporter","plugin_name":"datumaro_binary","plugin_type":"Exporter","extra_deps":[]},{"import_path":"datumaro.plugins.transforms.AnnsToLabels","plugin_name":"anns_to_labels","plugin_type":"Transform","extra_deps":[]},{"import_path":"datumaro.plugins.transforms.BboxValuesDecrement","plugin_name":"bbox_values_decrement","plugin_type":"Transform","extra_deps":[]},{"import_path":"datumaro.plugins.transforms.BoxesToMasks","plugin_name":"boxes_to_masks","plugin_type":"Transform","extra_deps":[]},{"import_path":"datumaro.plugins.transforms.Correct","plugin_name":"correct","plugin_type":"Transform","extra_deps":[]},{"import_path":"datumaro.plugins.transforms.CropCoveredSegments","plugin_name":"crop_covered_segments","plugin_type":"Transform","extra_deps":[]},{"import_path":"datumaro.plugins.transforms.IdFromImageName","plugin_name":"id_from_image_name","plugin_type":"Transform","extra_deps":[]},{"import_path":"datumaro.plugins.transforms.MapSubsets","plugin_name":"map_subsets","plugin_type":"Transform","extra_deps":[]},{"import_path":"datumaro.plugins.transforms.MasksToPolygons","plugin_name":"masks_to_polygons","plugin_type":"Transform","extra_deps":[]},{"import_path":"datumaro.plugins.transforms.MergeInstanceSegments","plugin_name":"merge_instance_segments","plugin_type":"Transform","extra_deps":[]},{"import_path":"datumaro.plugins.transforms.PolygonsToMasks","plugin_name":"polygons_to_masks","plugin_type":"Transform","extra_deps":[]},{"import_path":"datumaro.plugins.transforms.ProjectInfos","plugin_name":"project_infos","plugin_type":"Transform","extra_deps":[]},{"import_path":"datumaro.plugins.transforms.ProjectLabels","plugin_name":"project_labels","plugin_type":"Transform","extra_deps":[]},{"import_path":"datumaro.plugins.transforms.RandomSplit","plugin_name":"random_split","plugin_type":"Transform","extra_deps":[]},{"import_path":"datumaro.plugins.transforms.Reindex","plugin_name":"reindex","plugin_type":"Transform","extra_deps":[]},{"import_path":"datumaro.plugins.transforms.ReindexAnnotations","plugin_name":"reindex_annotations","plugin_type":"Transform","extra_deps":[]},{"import_path":"datumaro.plugins.transforms.RemapLabels","plugin_name":"remap_labels","plugin_type":"Transform","extra_deps":[]},{"import_path":"datumaro.plugins.transforms.RemoveAnnotations","plugin_name":"remove_annotations","plugin_type":"Transform","extra_deps":[]},{"import_path":"datumaro.plugins.transforms.RemoveAttributes","plugin_name":"remove_attributes","plugin_type":"Transform","extra_deps":[]},{"import_path":"datumaro.plugins.transforms.RemoveItems","plugin_name":"remove_items","plugin_type":"Transform","extra_deps":[]},{"import_path":"datumaro.plugins.transforms.Rename","plugin_name":"rename","plugin_type":"Transform","extra_deps":[]},{"import_path":"datumaro.plugins.transforms.ResizeTransform","plugin_name":"resize","plugin_type":"Transform","extra_deps":[]},{"import_path":"datumaro.plugins.transforms.ShapesToBoxes","plugin_name":"shapes_to_boxes","plugin_type":"Transform","extra_deps":[]},{"import_path":"datumaro.plugins.transforms.Sort","plugin_name":"sort","plugin_type":"Transform","extra_deps":[]},{"import_path":"datumaro.plugins.splitter.Split","plugin_name":"split","plugin_type":"Transform","extra_deps":[]},{"import_path":"datumaro.plugins.ndr.NDR","plugin_name":"ndr","plugin_type":"Transform","extra_deps":[]},{"import_path":"datumaro.plugins.tiling.tile.Tile","plugin_name":"tile","plugin_type":"Transform","extra_deps":[]},{"import_path":"datumaro.plugins.tiling.merge_tile.MergeTile","plugin_name":"merge_tile","plugin_type":"Transform","extra_deps":[]},{"import_path":"datumaro.plugins.sampler.random_sampler.LabelRandomSampler","plugin_name":"label_random_sampler","plugin_type":"Transform","extra_deps":[]},{"import_path":"datumaro.plugins.sampler.random_sampler.RandomSampler","plugin_name":"random_sampler","plugin_type":"Transform","extra_deps":[]},{"import_path":"datumaro.plugins.sampler.relevancy_sampler.RelevancySampler","plugin_name":"relevancy_sampler","plugin_type":"Transform","extra_deps":[]},{"import_path":"datumaro.plugins.validators.ClassificationValidator","plugin_name":"classification","plugin_type":"Validator","extra_deps":[]},{"import_path":"datumaro.plugins.validators.DetectionValidator","plugin_name":"detection","plugin_type":"Validator","extra_deps":[]},{"import_path":"datumaro.plugins.validators.SegmentationValidator","plugin_name":"segmentation","plugin_type":"Validator","extra_deps":[]}]
diff --git a/datumaro/plugins/specs.py b/datumaro/plugins/specs.py
index cb707e8e23..727047460d 100644
--- a/datumaro/plugins/specs.py
+++ b/datumaro/plugins/specs.py
@@ -4,7 +4,7 @@
 
 from pathlib import Path
 
-from datumaro.components.lazy_plugin import get_lazy_plugin
+from datumaro.components.lazy_plugin import get_extra_deps, get_lazy_plugin
 from datumaro.util import parse_json_file
 
 _SOURCE_PATH = Path(__file__).resolve()
@@ -12,8 +12,14 @@
 _SPECS_JSON_PATH = _SOURCE_DIR / "specs.json"
 
 LAZY_PLUGINS = [
-    get_lazy_plugin(spec["import_path"], spec["plugin_name"], spec["plugin_type"])
-    for spec in parse_json_file(str(_SPECS_JSON_PATH))
+    plugin
+    for plugin in [
+        get_lazy_plugin(
+            spec["import_path"], spec["plugin_name"], spec["plugin_type"], spec["extra_deps"]
+        )
+        for spec in parse_json_file(str(_SPECS_JSON_PATH))
+    ]
+    if plugin is not None
 ]
 
 if __name__ == "__main__":
@@ -35,6 +41,7 @@ def _enroll_to_plugin_specs(plugins, plugin_type):
                     "import_path": f"{mod}.{class_name}",
                     "plugin_name": plugin_name,
                     "plugin_type": plugin_type,
+                    "extra_deps": get_extra_deps(plugin),
                 }
             ]
 
diff --git a/tests/unit/test_environment.py b/tests/unit/test_environment.py
index 27f1ce353f..5466ca2e63 100644
--- a/tests/unit/test_environment.py
+++ b/tests/unit/test_environment.py
@@ -2,6 +2,8 @@
 #
 # SPDX-License-Identifier: MIT
 
+import sys
+
 import pytest
 
 from datumaro.components.environment import Environment
@@ -30,3 +32,28 @@ def test_equivalance(self, fxt_lazy_import: Environment, fxt_no_lazy_import: Env
         assert sorted(fxt_lazy_import.generators) == sorted(fxt_no_lazy_import.generators)
         assert sorted(fxt_lazy_import.transforms) == sorted(fxt_no_lazy_import.transforms)
         assert sorted(fxt_lazy_import.validators) == sorted(fxt_no_lazy_import.validators)
+
+    @pytest.fixture
+    def fxt_tf_failure(self, monkeypatch):
+        # Simulate `tensorflow` import failure
+        monkeypatch.setitem(sys.modules, "tensorflow", None)
+
+        with Environment.release_builtin_plugins():
+            env = Environment(use_lazy_import=True)
+            _ = env.importers
+            yield env
+
+    def test_extra_deps_req(self, fxt_tf_failure: Environment):
+        """Plugins affected by tensorflow import failure: `ac` and `tf_detection_api`."""
+        loaded_plugin_names = set(
+            sorted(fxt_tf_failure.extractors)
+            + sorted(fxt_tf_failure.importers)
+            + sorted(fxt_tf_failure.launchers)
+            + sorted(fxt_tf_failure.exporters)
+            + sorted(fxt_tf_failure.generators)
+            + sorted(fxt_tf_failure.transforms)
+            + sorted(fxt_tf_failure.validators)
+        )
+
+        assert "ac" not in loaded_plugin_names
+        assert "tf_detection_api" not in loaded_plugin_names

From 705f959dc8b6a13511679d82f41103a4129a448a Mon Sep 17 00:00:00 2001
From: "Kim, Vinnam" <vinnam.kim@intel.com>
Date: Wed, 31 May 2023 16:26:08 +0900
Subject: [PATCH 08/10] Add openvino.tools import failure

Signed-off-by: Kim, Vinnam <vinnam.kim@intel.com>
---
 tests/unit/test_environment.py | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/tests/unit/test_environment.py b/tests/unit/test_environment.py
index 5466ca2e63..7a688f88a3 100644
--- a/tests/unit/test_environment.py
+++ b/tests/unit/test_environment.py
@@ -35,7 +35,8 @@ def test_equivalance(self, fxt_lazy_import: Environment, fxt_no_lazy_import: Env
 
     @pytest.fixture
     def fxt_tf_failure(self, monkeypatch):
-        # Simulate `tensorflow` import failure
+        # Simulate `openvino.tools` and `tensorflow` import failure
+        monkeypatch.setitem(sys.modules, "openvino.tools", None)
         monkeypatch.setitem(sys.modules, "tensorflow", None)
 
         with Environment.release_builtin_plugins():
@@ -44,7 +45,7 @@ def fxt_tf_failure(self, monkeypatch):
             yield env
 
     def test_extra_deps_req(self, fxt_tf_failure: Environment):
-        """Plugins affected by tensorflow import failure: `ac` and `tf_detection_api`."""
+        """Plugins affected by the import failure: `ac` and `tf_detection_api`."""
         loaded_plugin_names = set(
             sorted(fxt_tf_failure.extractors)
             + sorted(fxt_tf_failure.importers)

From 29093ecd3e4233e3c2e3b2c66c08a55ed4f5f1ed Mon Sep 17 00:00:00 2001
From: "Kim, Vinnam" <vinnam.kim@intel.com>
Date: Wed, 31 May 2023 16:49:21 +0900
Subject: [PATCH 09/10] Fix import error mocking

Signed-off-by: Kim, Vinnam <vinnam.kim@intel.com>
---
 tests/unit/test_environment.py | 35 ++++++++++++++++++++++------------
 1 file changed, 23 insertions(+), 12 deletions(-)

diff --git a/tests/unit/test_environment.py b/tests/unit/test_environment.py
index 7a688f88a3..db6024603a 100644
--- a/tests/unit/test_environment.py
+++ b/tests/unit/test_environment.py
@@ -2,12 +2,15 @@
 #
 # SPDX-License-Identifier: MIT
 
+import builtins
 import sys
 
 import pytest
 
 from datumaro.components.environment import Environment
 
+real_import = builtins.__import__
+
 
 class EnvironmentTest:
     @pytest.fixture
@@ -34,26 +37,34 @@ def test_equivalance(self, fxt_lazy_import: Environment, fxt_no_lazy_import: Env
         assert sorted(fxt_lazy_import.validators) == sorted(fxt_no_lazy_import.validators)
 
     @pytest.fixture
-    def fxt_tf_failure(self, monkeypatch):
-        # Simulate `openvino.tools` and `tensorflow` import failure
-        monkeypatch.setitem(sys.modules, "openvino.tools", None)
-        monkeypatch.setitem(sys.modules, "tensorflow", None)
+    def fxt_tf_import_error(self, monkeypatch):
+        # Simulate `tensorflow` import failure
+
+        def monkey_import_notfound(name, globals=None, locals=None, fromlist=(), level=0):
+            if name in ("tensorflow",):
+                raise ModuleNotFoundError(f"Mocked module not found {name}")
+            return real_import(name, globals=globals, locals=locals, fromlist=fromlist, level=level)
 
+        monkeypatch.delitem(sys.modules, "tensorflow", raising=False)
+        monkeypatch.setattr(builtins, "__import__", monkey_import_notfound)
+
+    @pytest.fixture
+    def fxt_tf_failure_env(self, fxt_tf_import_error):
         with Environment.release_builtin_plugins():
             env = Environment(use_lazy_import=True)
             _ = env.importers
             yield env
 
-    def test_extra_deps_req(self, fxt_tf_failure: Environment):
+    def test_extra_deps_req(self, fxt_tf_failure_env: Environment):
         """Plugins affected by the import failure: `ac` and `tf_detection_api`."""
         loaded_plugin_names = set(
-            sorted(fxt_tf_failure.extractors)
-            + sorted(fxt_tf_failure.importers)
-            + sorted(fxt_tf_failure.launchers)
-            + sorted(fxt_tf_failure.exporters)
-            + sorted(fxt_tf_failure.generators)
-            + sorted(fxt_tf_failure.transforms)
-            + sorted(fxt_tf_failure.validators)
+            sorted(fxt_tf_failure_env.extractors)
+            + sorted(fxt_tf_failure_env.importers)
+            + sorted(fxt_tf_failure_env.launchers)
+            + sorted(fxt_tf_failure_env.exporters)
+            + sorted(fxt_tf_failure_env.generators)
+            + sorted(fxt_tf_failure_env.transforms)
+            + sorted(fxt_tf_failure_env.validators)
         )
 
         assert "ac" not in loaded_plugin_names

From 3c717963116f59a58b52b93d0e67a9e59b214f1d Mon Sep 17 00:00:00 2001
From: "Kim, Vinnam" <vinnam.kim@intel.com>
Date: Wed, 31 May 2023 17:25:37 +0900
Subject: [PATCH 10/10] Fix mocking import error again

Signed-off-by: Kim, Vinnam <vinnam.kim@intel.com>
---
 datumaro/components/environment.py |  7 +--
 datumaro/plugins/specs.py          | 21 +++++----
 tests/unit/test_environment.py     | 69 +++++++++++++++---------------
 3 files changed, 48 insertions(+), 49 deletions(-)

diff --git a/datumaro/components/environment.py b/datumaro/components/environment.py
index 46e9bb710e..60b6dc27dd 100644
--- a/datumaro/components/environment.py
+++ b/datumaro/components/environment.py
@@ -6,7 +6,6 @@
 import importlib
 import logging as log
 import os.path as osp
-from contextlib import contextmanager
 from functools import partial
 from inspect import isclass
 from typing import (
@@ -230,9 +229,9 @@ def _load_plugins(cls, module_names, *, importer, types=None):
     def _load_builtin_plugins(cls):
         """Load builtin plugins which will be imported lazily using plugin spec files"""
         if cls._builtin_plugins is None:
-            from datumaro.plugins.specs import LAZY_PLUGINS
+            from datumaro.plugins.specs import get_lazy_plugins
 
-            cls._builtin_plugins = LAZY_PLUGINS
+            cls._builtin_plugins = get_lazy_plugins()
         return cls._builtin_plugins
 
     @classmethod
@@ -355,10 +354,8 @@ def _register(registry: PluginRegistry):
         return merged
 
     @classmethod
-    @contextmanager
     def release_builtin_plugins(cls):
         cls._builtin_plugins = None
-        yield
 
 
 DEFAULT_ENVIRONMENT = Environment()
diff --git a/datumaro/plugins/specs.py b/datumaro/plugins/specs.py
index 727047460d..01ad21db90 100644
--- a/datumaro/plugins/specs.py
+++ b/datumaro/plugins/specs.py
@@ -11,16 +11,19 @@
 _SOURCE_DIR = _SOURCE_PATH.parent
 _SPECS_JSON_PATH = _SOURCE_DIR / "specs.json"
 
-LAZY_PLUGINS = [
-    plugin
-    for plugin in [
-        get_lazy_plugin(
-            spec["import_path"], spec["plugin_name"], spec["plugin_type"], spec["extra_deps"]
-        )
-        for spec in parse_json_file(str(_SPECS_JSON_PATH))
+
+def get_lazy_plugins():
+    return [
+        plugin
+        for plugin in [
+            get_lazy_plugin(
+                spec["import_path"], spec["plugin_name"], spec["plugin_type"], spec["extra_deps"]
+            )
+            for spec in parse_json_file(str(_SPECS_JSON_PATH))
+        ]
+        if plugin is not None
     ]
-    if plugin is not None
-]
+
 
 if __name__ == "__main__":
     from datumaro.components.environment import Environment
diff --git a/tests/unit/test_environment.py b/tests/unit/test_environment.py
index db6024603a..f608c8f2cb 100644
--- a/tests/unit/test_environment.py
+++ b/tests/unit/test_environment.py
@@ -2,30 +2,30 @@
 #
 # SPDX-License-Identifier: MIT
 
-import builtins
-import sys
-
 import pytest
 
+import datumaro.components.lazy_plugin
 from datumaro.components.environment import Environment
 
-real_import = builtins.__import__
+real_import_module = datumaro.components.lazy_plugin.import_module
 
 
 class EnvironmentTest:
     @pytest.fixture
     def fxt_lazy_import(self):
-        with Environment.release_builtin_plugins():
-            env = Environment(use_lazy_import=True)
-            _ = env.importers
-            yield env
+        Environment.release_builtin_plugins()
+        env = Environment(use_lazy_import=True)
+        _ = env.importers
+        yield env
+        Environment.release_builtin_plugins()
 
     @pytest.fixture
     def fxt_no_lazy_import(self):
-        with Environment.release_builtin_plugins():
-            env = Environment(use_lazy_import=False)
-            _ = env.importers
-            yield env
+        Environment.release_builtin_plugins()
+        env = Environment(use_lazy_import=False)
+        _ = env.importers
+        yield env
+        Environment.release_builtin_plugins()
 
     def test_equivalance(self, fxt_lazy_import: Environment, fxt_no_lazy_import: Environment):
         assert sorted(fxt_lazy_import.extractors) == sorted(fxt_no_lazy_import.extractors)
@@ -37,34 +37,33 @@ def test_equivalance(self, fxt_lazy_import: Environment, fxt_no_lazy_import: Env
         assert sorted(fxt_lazy_import.validators) == sorted(fxt_no_lazy_import.validators)
 
     @pytest.fixture
-    def fxt_tf_import_error(self, monkeypatch):
-        # Simulate `tensorflow` import failure
-
-        def monkey_import_notfound(name, globals=None, locals=None, fromlist=(), level=0):
-            if name in ("tensorflow",):
-                raise ModuleNotFoundError(f"Mocked module not found {name}")
-            return real_import(name, globals=globals, locals=locals, fromlist=fromlist, level=level)
+    def fxt_tf_failure_env(self, monkeypatch):
+        def _patch(name, package=None):
+            if name == "tensorflow":
+                raise ImportError()
+            return real_import_module(name, package)
 
-        monkeypatch.delitem(sys.modules, "tensorflow", raising=False)
-        monkeypatch.setattr(builtins, "__import__", monkey_import_notfound)
+        monkeypatch.setattr(datumaro.components.lazy_plugin, "import_module", _patch)
 
-    @pytest.fixture
-    def fxt_tf_failure_env(self, fxt_tf_import_error):
-        with Environment.release_builtin_plugins():
-            env = Environment(use_lazy_import=True)
-            _ = env.importers
-            yield env
+        Environment.release_builtin_plugins()
+        env = Environment(use_lazy_import=True)
+        _ = env.importers
+        yield env
+        Environment.release_builtin_plugins()
 
-    def test_extra_deps_req(self, fxt_tf_failure_env: Environment):
+    def test_extra_deps_req(self, fxt_tf_failure_env):
         """Plugins affected by the import failure: `ac` and `tf_detection_api`."""
+
+        env = fxt_tf_failure_env
+
         loaded_plugin_names = set(
-            sorted(fxt_tf_failure_env.extractors)
-            + sorted(fxt_tf_failure_env.importers)
-            + sorted(fxt_tf_failure_env.launchers)
-            + sorted(fxt_tf_failure_env.exporters)
-            + sorted(fxt_tf_failure_env.generators)
-            + sorted(fxt_tf_failure_env.transforms)
-            + sorted(fxt_tf_failure_env.validators)
+            sorted(env.extractors)
+            + sorted(env.importers)
+            + sorted(env.launchers)
+            + sorted(env.exporters)
+            + sorted(env.generators)
+            + sorted(env.transforms)
+            + sorted(env.validators)
         )
 
         assert "ac" not in loaded_plugin_names