Automatic loading of namespaced custom components

config.yaml

@@ -1,3 +1,2 @@
 kafka_brokers: "http://k8kafka-cp-kafka-headless.kpops.svc.cluster.local:9092"
-components_module: tests.pipeline.test_components
 pipeline_base_dir: tests/pipeline

docs/docs/resources/pipeline-config/config.yaml

@@ -1,14 +1,12 @@
 # CONFIGURATION
 #
-# Custom Python module defining project-specific KPOps components
-components_module: null
 # Base directory to the pipelines (default is current working directory)
 pipeline_base_dir: .
 # The Kafka brokers address.
 # REQUIRED
 kafka_brokers: "http://broker1:9092,http://broker2:9092"
 # Configure the topic name variables you can use in the pipeline definition.
-topic_name_config: 
+topic_name_config:
   # Configures the value for the variable ${output_topic_name}
   default_output_topic_name: ${pipeline.name}-${component.name}
   # Configures the value for the variable ${error_topic_name}
@@ -27,9 +25,6 @@ kafka_rest:
 kafka_connect:
   # Address of Kafka Connect.
   url: "http://localhost:8083"
-# The timeout in seconds that specifies when actions like deletion or deploy
-# timeout.
-timeout: 300
 # Flag for `helm upgrade --install`.
 # Create the release namespace if not present.
 create_namespace: false
@@ -42,7 +37,7 @@ helm_config:
   # Kubernetes API version used for Capabilities.APIVersions
   api_version: null
 # Configure Helm Diff.
-helm_diff_config: 
+helm_diff_config:
   # Set of keys that should not be checked.
   ignore:
     - name

docs/docs/resources/variables/config_env_vars.env

@@ -4,9 +4,6 @@
 # settings in `config.yaml`. Variables marked as required can instead
 # be set in the global config.
 #
-# components_module
-# Custom Python module defining project-specific KPOps components
-KPOPS_COMPONENTS_MODULE # No default value, not required
 # pipeline_base_dir
 # Base directory to the pipelines (default is current working
 # directory)

docs/docs/resources/variables/config_env_vars.md

@@ -2,7 +2,6 @@ These variables take precedence over the settings in `config.yaml`. Variables ma
 
 |                       Name                       |             Default Value              |Required|                                   Description                                    |               Setting name                |
 |--------------------------------------------------|----------------------------------------|--------|----------------------------------------------------------------------------------|-------------------------------------------|
-|KPOPS_COMPONENTS_MODULE                           |                                        |False   |Custom Python module defining project-specific KPOps components                   |components_module                          |
 |KPOPS_PIPELINE_BASE_DIR                           |.                                       |False   |Base directory to the pipelines (default is current working directory)            |pipeline_base_dir                          |
 |KPOPS_KAFKA_BROKERS                               |                                        |True    |The comma separated Kafka brokers address.                                        |kafka_brokers                              |
 |KPOPS_TOPIC_NAME_CONFIG__DEFAULT_OUTPUT_TOPIC_NAME|${pipeline.name}-${component.name}      |False   |Configures the value for the variable ${output_topic_name}                        |topic_name_config.default_output_topic_name|

docs/docs/schema/config.json

@@ -177,19 +177,6 @@
     "additionalProperties": false,
     "description": "Global configuration for KPOps project.",
     "properties": {
-        "components_module": {
-            "anyOf": [
-                {
-                    "type": "string"
-                },
-                {
-                    "type": "null"
-                }
-            ],
-            "default": null,
-            "description": "Custom Python module defining project-specific KPOps components",
-            "title": "Components Module"
-        },
         "create_namespace": {
             "default": false,
             "description": "Flag for `helm upgrade --install`. Create the release namespace if not present.",

docs/docs/user/migration-guide/v6-v7.md

@@ -0,0 +1,62 @@
+# Migrate from V6 to V7
+
+## [Automatic loading of namespaced custom components](https://github.com/bakdata/kpops/pull/500)
+
+KPOps is now distributed as a Python namespace package (as defined by [PEP 420](https://peps.python.org/pep-0420/)). This allows us to standardize the namespace `kpops.components` for both builtin and custom pipeline components.
+
+As a result of the restructure, some imports need to be adjusted:
+
+**KPOps Python API**
+
+```diff
+-import kpops
++import kpops.api as kpops
+```
+
+**builtin KPOps components**
+
+```diff
+-from kpops.components import (
+-    HelmApp,
+-    KafkaApp,
+-    KafkaConnector,
+-    KafkaSinkConnector,
+-    KafkaSourceConnector,
+-    KubernetesApp,
+-    StreamsBootstrap,
+-    ProducerApp,
+-    StreamsApp,
+-    PipelineComponent,
+-    StreamsApp,
+-    ProducerApp,
+-)
++from kpops.components.base_components import (
++    HelmApp,
++    KafkaApp,
++    KafkaConnector,
++    KafkaSinkConnector,
++    KafkaSourceConnector,
++    KubernetesApp,
++    PipelineComponent,
++)
++from kpops.components.streams_bootstrap import (
++    StreamsBootstrap,
++    StreamsApp,
++    ProducerApp,
++)
+```
+
+### your custom KPOps components
+
+#### config.yaml
+
+```diff
+-components_module: components
+```
+
+#### Python module
+
+```diff
+-components/__init__.py
++kpops/components/custom/__init__.py
+```

docs/docs/user/references/cli-commands.md

@@ -215,15 +215,16 @@ $ kpops schema [OPTIONS] SCOPE:{pipeline|defaults|config}
 
 
 
-        pipeline: Schema of PipelineComponents. Includes the built-in KPOps components by default. To include custom components, provide components module in config.
+        - pipeline: Schema of PipelineComponents for KPOps pipeline.yaml
         
 
 
+        - defaults: Schema of PipelineComponents for KPOps defaults.yaml
+        
+
 
-        config: Schema of KpopsConfig.  [required]
+        - config: Schema for KPOps config.yaml  [required]
 
 **Options**:
 
-* `--config DIRECTORY`: Path to the dir containing config.yaml files  [env var: KPOPS_CONFIG_PATH; default: .]
-* `--include-stock-components / --no-include-stock-components`: Include the built-in KPOps components.  [default: include-stock-components]
 * `--help`: Show this message and exit.

docs/mkdocs.yml

@@ -130,6 +130,7 @@ nav:
               - Migrate from v3 to v4: user/migration-guide/v3-v4.md
               - Migrate from v4 to v5: user/migration-guide/v4-v5.md
               - Migrate from v5 to v6: user/migration-guide/v5-v6.md
+              - Migrate from v6 to v7: user/migration-guide/v6-v7.md
           - CLI usage: user/references/cli-commands.md
           - Editor integration: user/references/editor-integration.md
           - CI integration:

hooks/gen_docs/gen_docs_components.py

@@ -8,12 +8,18 @@
 import yaml
 
 from hooks import ROOT
-from kpops.api.registry import _find_classes
-from kpops.components import KafkaConnector, PipelineComponent
+from kpops.api.registry import Registry
+from kpops.components.base_components.kafka_connector import KafkaConnector
+from kpops.components.base_components.pipeline_component import (
+    PipelineComponent,
+)
 from kpops.utils.colorify import redify, yellowify
 from kpops.utils.pydantic import issubclass_patched
 from kpops.utils.yaml import load_yaml_file
 
+registry = Registry()
+registry.discover_components()
+
 PATH_KPOPS_MAIN = ROOT / "kpops/cli/main.py"
 PATH_CLI_COMMANDS_DOC = ROOT / "docs/docs/user/references/cli-commands.md"
 PATH_DOCS_RESOURCES = ROOT / "docs/docs/resources"
@@ -33,7 +39,7 @@
     (PATH_DOCS_RESOURCES / "pipeline-defaults/headers").iterdir(),
 )
 
-KPOPS_COMPONENTS = tuple(_find_classes("kpops.components", PipelineComponent))
+KPOPS_COMPONENTS = tuple(registry.components)
 KPOPS_COMPONENTS_SECTIONS = {
     component.type: [
         field_name

kpops/api/__init__.py

@@ -4,7 +4,6 @@
 from pathlib import Path
 from typing import TYPE_CHECKING
 
-import kpops
 from kpops.api.logs import log, log_action
 from kpops.api.options import FilterType
 from kpops.api.registry import Registry
@@ -23,8 +22,8 @@
 from kpops.utils.cli_commands import init_project
 
 if TYPE_CHECKING:
-    from kpops.components import PipelineComponent
     from kpops.components.base_components.models.resource import Resource
+    from kpops.components.base_components.pipeline_component import PipelineComponent
     from kpops.config import KpopsConfig
 
 
@@ -90,7 +89,7 @@ def manifest(
     :param verbose: Enable verbose printing.
     :return: Resources.
     """
-    pipeline = kpops.generate(
+    pipeline = generate(
         pipeline_path=pipeline_path,
         dotenv=dotenv,
         config=config,
@@ -129,7 +128,7 @@ def deploy(
     :param verbose: Enable verbose printing.
     :param parallel: Enable or disable parallel execution of pipeline steps.
     """
-    pipeline = kpops.generate(
+    pipeline = generate(
         pipeline_path=pipeline_path,
         dotenv=dotenv,
         config=config,
@@ -177,7 +176,7 @@ def destroy(
     :param verbose: Enable verbose printing.
     :param parallel: Enable or disable parallel execution of pipeline steps.
     """
-    pipeline = kpops.generate(
+    pipeline = generate(
         pipeline_path=pipeline_path,
         dotenv=dotenv,
         config=config,
@@ -227,7 +226,7 @@ def reset(
     :param verbose: Enable verbose printing.
     :param parallel: Enable or disable parallel execution of pipeline steps.
     """
-    pipeline = kpops.generate(
+    pipeline = generate(
         pipeline_path=pipeline_path,
         dotenv=dotenv,
         config=config,
@@ -276,7 +275,7 @@ def clean(
     :param verbose: Enable verbose printing.
     :param parallel: Enable or disable parallel execution of pipeline steps.
     """
-    pipeline = kpops.generate(
+    pipeline = generate(
         pipeline_path=pipeline_path,
         dotenv=dotenv,
         config=config,
@@ -333,9 +332,7 @@ def _create_pipeline(
     :return: Created `Pipeline` object.
     """
     registry = Registry()
-    if kpops_config.components_module:
-        registry.find_components(kpops_config.components_module)
-    registry.find_components("kpops.components")
+    registry.discover_components()
 
     handlers = _setup_handlers(kpops_config)
     parser = PipelineGenerator(kpops_config, registry, handlers)

kpops/api/file_type.py

@@ -33,3 +33,8 @@ def as_yaml_file(self, prefix: str = "", suffix: str = "") -> str:
             'pre_pipeline_suf.yaml'
         """
         return prefix + self.value + suffix + FILE_EXTENSION
+
+
+PIPELINE_YAML = KpopsFileType.PIPELINE.as_yaml_file()
+DEFAULTS_YAML = KpopsFileType.DEFAULTS.as_yaml_file()
+CONFIG_YAML = KpopsFileType.CONFIG.as_yaml_file()

kpops/api/logs.py

@@ -6,7 +6,7 @@
 import typer
 
 if TYPE_CHECKING:
-    from kpops.components import PipelineComponent
+    from kpops.components.base_components.pipeline_component import PipelineComponent
 
 
 class CustomFormatter(logging.Formatter):

kpops/api/options.py

@@ -4,7 +4,7 @@
 from typing import TYPE_CHECKING
 
 if TYPE_CHECKING:
-    from kpops.components import PipelineComponent
+    from kpops.components.base_components.pipeline_component import PipelineComponent
     from kpops.pipeline import ComponentFilterPredicate