feat(airflow): Add --conf-source to DAG created with kedro-airflow (kedro-org#712)

* Add --conf-source to kedro-airflow

Signed-off-by: Ankita Katiyar <ankitakatiyar2401@gmail.com>

* Add conf_source to operator

Signed-off-by: Ankita Katiyar <ankitakatiyar2401@gmail.com>

* Set default behavour

Signed-off-by: Ankita Katiyar <ankitakatiyar2401@gmail.com>

* fix tests

Signed-off-by: Ankita Katiyar <ankitakatiyar2401@gmail.com>

* fix tests

Signed-off-by: Ankita Katiyar <ankitakatiyar2401@gmail.com>

* Release notes + remove print

Signed-off-by: Ankita Katiyar <ankitakatiyar2401@gmail.com>

* Turn of path exist check

Signed-off-by: Ankita Katiyar <ankitakatiyar2401@gmail.com>

* Turn of path resolving

Signed-off-by: Ankita Katiyar <ankitakatiyar2401@gmail.com>

---------

Signed-off-by: Ankita Katiyar <ankitakatiyar2401@gmail.com>

Author: ankatiyar

kedro-airflow/RELEASE.md

@@ -1,4 +1,5 @@
 # Upcoming Release
+* Added support to specify `--conf-source` which would point to the runtime configuration directory to be used for running the DAG in airflow. This configuration path is added to the generated DAG.
 
 # Release 0.9.0
 * Sort DAGs to make sure `kedro airflow create` is deterministic.

kedro-airflow/kedro_airflow/airflow_dag_template.j2

@@ -20,6 +20,7 @@ class KedroOperator(BaseOperator):
         node_name: str | list[str],
         project_path: str | Path,
         env: str,
+        conf_source: str,
         *args, **kwargs
     ) -> None:
         super().__init__(*args, **kwargs)
@@ -28,10 +29,11 @@ class KedroOperator(BaseOperator):
         self.node_name = node_name
         self.project_path = project_path
         self.env = env
+        self.conf_source = conf_source
 
     def execute(self, context):
         configure_project(self.package_name)
-        with KedroSession.create(self.project_path, env=self.env) as session:
+        with KedroSession.create(self.project_path, env=self.env, conf_source=self.conf_source) as session:
             if isinstance(self.node_name, str):
                 self.node_name = [self.node_name]
             session.run(self.pipeline_name, node_names=self.node_name)
@@ -41,6 +43,8 @@ env = "{{ env }}"
 pipeline_name = "{{ pipeline_name }}"
 project_path = Path.cwd()
 package_name = "{{ package_name }}"
+conf_source = "{{ conf_source }}" or Path.cwd() / "conf"
+
 
 # Using a DAG context manager, you don't have to specify the dag property of each task
 with DAG(
@@ -68,6 +72,7 @@ with DAG(
             node_name={% if node_list | length > 1 %}[{% endif %}{% for node in node_list %}"{{ node.name | safe }}"{% if not loop.last %}, {% endif %}{% endfor %}{% if node_list | length > 1 %}]{% endif %},
             project_path=project_path,
             env=env,
+            conf_source=conf_source,
         ),
 {% endfor %}    }
 

kedro-airflow/kedro_airflow/plugin.py

@@ -34,6 +34,7 @@
 `--tags tag1,tag2`."""
 DEFAULT_RUN_ENV = "local"
 DEFAULT_PIPELINE = "__default__"
+CONF_SOURCE_HELP = """Path to the configuration folder or archived file to be used in the Airflow DAG."""
 
 
 @click.group(name="Kedro-Airflow")
@@ -134,6 +135,12 @@ def _get_pipeline_config(config_airflow: dict, params: dict, pipeline_name: str)
     help=PARAMS_ARG_HELP,
     callback=_split_params,
 )
+@click.option(
+    "--conf-source",
+    type=click.Path(exists=False, file_okay=True, resolve_path=False),
+    help=CONF_SOURCE_HELP,
+    default=None,
+)
 @click.pass_obj
 def create(  # noqa: PLR0913, PLR0912
     metadata: ProjectMetadata,
@@ -144,9 +151,13 @@ def create(  # noqa: PLR0913, PLR0912
     group_in_memory,
     tags,
     params,
+    conf_source,
     convert_all: bool,
 ):
     """Create an Airflow DAG for a project"""
+
+    if conf_source is None:
+        conf_source = ""
     if convert_all and pipeline_names != (DEFAULT_PIPELINE,):
         raise click.BadParameter(
             "The `--all` and `--pipeline` option are mutually exclusive."
@@ -228,6 +239,7 @@ def create(  # noqa: PLR0913, PLR0912
             pipeline_name=name,
             package_name=package_name,
             pipeline=pipeline,
+            conf_source=conf_source,
             **dag_config,
         ).dump(str(dag_filename))
 

kedro-airflow/tests/test_plugin.py

@@ -376,3 +376,18 @@ def test_create_airflow_all_and_pipeline(cli_runner, metadata):
         "Error: Invalid value: The `--all` and `--pipeline` option are mutually exclusive."
         in result.stdout
     )
+
+
+def test_create_airflow_conf_source(cli_runner, metadata):
+    command = ["airflow", "create", "--conf-source", "conf"]
+    result = cli_runner.invoke(commands, command, obj=metadata)
+    assert result.exit_code == 0
+    dag_file = metadata.project_path / "airflow_dags" / "fake_project_dag.py"
+
+    assert dag_file.exists()
+
+    expected_airflow_dag = 'conf_source = "conf" or Path.cwd() / "conf"'
+    with dag_file.open(encoding="utf-8") as f:
+        dag_code = [line.strip() for line in f.read().splitlines()]
+        assert expected_airflow_dag in dag_code
+    dag_file.unlink()