fix(ingest/transformer): replace externalUrl in dataset properties (d…

…atahub-project#10281)

metadata-ingestion/docs/transformer/dataset_transformer.md

@@ -907,6 +907,24 @@ Then define your class to return a list of custom properties, for example:
           add_properties_resolver_class: "<your_module>.<your_class>"
     ```
 
+## Replace ExternalUrl
+### Config Details
+| Field                       | Required | Type    | Default       | Description                                 |
+|-----------------------------|----------|---------|---------------|---------------------------------------------|
+| `input_pattern`                 | ✅         | string    |    | String or pattern to replace |
+| `replacement`                 | ✅         | string    |    | Replacement string |
+
+
+Matches the full/partial string in the externalUrl of the dataset properties and replace that with the replacement string
+
+```yaml
+transformers:
+  - type: "replace_external_url"
+    config:
+      input_pattern: '\b\w*hub\b'
+      replacement: "sub"
+```
+
 ## Simple Add Dataset domains 
 ### Config Details
 | Field              | Required | Type                   | Default       | Description                                                      |

metadata-ingestion/setup.py

@@ -687,6 +687,7 @@
         "add_dataset_dataproduct = datahub.ingestion.transformer.add_dataset_dataproduct:AddDatasetDataProduct",
         "simple_add_dataset_dataproduct = datahub.ingestion.transformer.add_dataset_dataproduct:SimpleAddDatasetDataProduct",
         "pattern_add_dataset_dataproduct = datahub.ingestion.transformer.add_dataset_dataproduct:PatternAddDatasetDataProduct",
+        "replace_external_url = datahub.ingestion.transformer.replace_external_url:ReplaceExternalUrl"
     ],
     "datahub.ingestion.sink.plugins": [
         "file = datahub.ingestion.sink.file:FileSink",

metadata-ingestion/src/datahub/ingestion/transformer/replace_external_url.py

@@ -0,0 +1,65 @@
+import copy
+import re
+from typing import Any, Dict, Optional, cast
+
+from datahub.configuration.common import ConfigModel
+from datahub.emitter.mce_builder import Aspect
+from datahub.ingestion.api.common import PipelineContext
+from datahub.ingestion.transformer.dataset_transformer import (
+    DatasetPropertiesTransformer,
+)
+from datahub.metadata.schema_classes import DatasetPropertiesClass
+
+
+class ReplaceExternalUrlConfig(ConfigModel):
+    input_pattern: str
+    replacement: str
+
+
+class ReplaceExternalUrl(DatasetPropertiesTransformer):
+    """Transformer that clean the ownership URN."""
+
+    ctx: PipelineContext
+    config: ReplaceExternalUrlConfig
+
+    def __init__(
+        self,
+        config: ReplaceExternalUrlConfig,
+        ctx: PipelineContext,
+        **resolver_args: Dict[str, Any],
+    ):
+        super().__init__()
+        self.ctx = ctx
+        self.config = config
+        self.resolver_args = resolver_args
+
+    @classmethod
+    def create(cls, config_dict: dict, ctx: PipelineContext) -> "ReplaceExternalUrl":
+        config = ReplaceExternalUrlConfig.parse_obj(config_dict)
+        return cls(config, ctx)
+
+    def transform_aspect(
+        self, entity_urn: str, aspect_name: str, aspect: Optional[Aspect]
+    ) -> Optional[Aspect]:
+        in_dataset_properties_aspect: DatasetPropertiesClass = cast(
+            DatasetPropertiesClass, aspect
+        )
+
+        if (
+            not hasattr(in_dataset_properties_aspect, "externalUrl")
+            or not in_dataset_properties_aspect.externalUrl
+        ):
+            return cast(Aspect, in_dataset_properties_aspect)
+        else:
+            out_dataset_properties_aspect: DatasetPropertiesClass = copy.deepcopy(
+                in_dataset_properties_aspect
+            )
+
+            pattern = re.compile(self.config.input_pattern)
+            replacement = self.config.replacement
+
+            out_dataset_properties_aspect.externalUrl = re.sub(
+                pattern, replacement, in_dataset_properties_aspect.externalUrl
+            )
+
+            return cast(Aspect, out_dataset_properties_aspect)

metadata-ingestion/tests/unit/test_transform_dataset.py

@@ -72,9 +72,13 @@
     ExtractOwnersFromTagsTransformer,
 )
 from datahub.ingestion.transformer.mark_dataset_status import MarkDatasetStatus
+from datahub.ingestion.transformer.pattern_cleanup_ownership import (
+    PatternCleanUpOwnership,
+)
 from datahub.ingestion.transformer.remove_dataset_ownership import (
     SimpleRemoveDatasetOwnership,
 )
+from datahub.ingestion.transformer.replace_external_url import ReplaceExternalUrl
 from datahub.metadata.schema_classes import (
     BrowsePathsClass,
     DatasetPropertiesClass,
@@ -87,9 +91,6 @@
 )
 from datahub.utilities.urns.dataset_urn import DatasetUrn
 from datahub.utilities.urns.urn import Urn
-from src.datahub.ingestion.transformer.pattern_cleanup_ownership import (
-    PatternCleanUpOwnership,
-)
 
 
 def make_generic_dataset(
@@ -3209,3 +3210,84 @@ def test_clean_owner_urn_transformation_should_not_remove_system_identifier(
     config: List[Union[re.Pattern, str]] = ["urn:li:corpuser:"]
 
     _test_clean_owner_urns(pipeline_context, in_owner_urns, config, in_owner_urns)
+
+
+def test_replace_external_url_word_replace(
+    mock_datahub_graph,
+):
+    pipeline_context: PipelineContext = PipelineContext(
+        run_id="test_replace_external_url"
+    )
+    pipeline_context.graph = mock_datahub_graph(DatahubClientConfig)
+
+    output = run_dataset_transformer_pipeline(
+        transformer_type=ReplaceExternalUrl,
+        aspect=models.DatasetPropertiesClass(
+            externalUrl="https://github.com/datahub/looker-demo/blob/master/foo.view.lkml",
+            customProperties=EXISTING_PROPERTIES.copy(),
+        ),
+        config={"input_pattern": "datahub", "replacement": "starhub"},
+        pipeline_context=pipeline_context,
+    )
+
+    assert len(output) == 2
+    assert output[0].record
+    assert output[0].record.aspect
+    assert (
+        output[0].record.aspect.externalUrl
+        == "https://github.com/starhub/looker-demo/blob/master/foo.view.lkml"
+    )
+
+
+def test_replace_external_regex_replace_1(
+    mock_datahub_graph,
+):
+    pipeline_context: PipelineContext = PipelineContext(
+        run_id="test_replace_external_url"
+    )
+    pipeline_context.graph = mock_datahub_graph(DatahubClientConfig)
+
+    output = run_dataset_transformer_pipeline(
+        transformer_type=ReplaceExternalUrl,
+        aspect=models.DatasetPropertiesClass(
+            externalUrl="https://github.com/datahub/looker-demo/blob/master/foo.view.lkml",
+            customProperties=EXISTING_PROPERTIES.copy(),
+        ),
+        config={"input_pattern": r"datahub/.*/", "replacement": "starhub/test/"},
+        pipeline_context=pipeline_context,
+    )
+
+    assert len(output) == 2
+    assert output[0].record
+    assert output[0].record.aspect
+    assert (
+        output[0].record.aspect.externalUrl
+        == "https://github.com/starhub/test/foo.view.lkml"
+    )
+
+
+def test_replace_external_regex_replace_2(
+    mock_datahub_graph,
+):
+    pipeline_context: PipelineContext = PipelineContext(
+        run_id="test_replace_external_url"
+    )
+    pipeline_context.graph = mock_datahub_graph(DatahubClientConfig)
+
+    output = run_dataset_transformer_pipeline(
+        transformer_type=ReplaceExternalUrl,
+        aspect=models.DatasetPropertiesClass(
+            externalUrl="https://github.com/datahub/looker-demo/blob/master/foo.view.lkml",
+            customProperties=EXISTING_PROPERTIES.copy(),
+        ),
+        config={"input_pattern": r"\b\w*hub\b", "replacement": "test"},
+        pipeline_context=pipeline_context,
+    )
+
+    assert len(output) == 2
+    assert output[0].record
+    assert output[0].record.aspect
+    assert (
+        output[0].record.aspect.externalUrl
+        == "https://test.com/test/looker-demo/blob/master/foo.view.lkml"
+    )