Unify command names in CLI (#10720)

* Unify command names in CLI

* fixup! Unify command names in CLI

UPDATING.md

@@ -235,6 +235,7 @@ you have to run the help command: ``airflow celery --help``.
 | ``airflow list_dag_runs``     | ``airflow dags list-runs``         |    ``dags``        |
 | ``airflow pause``             | ``airflow dags pause``             |    ``dags``        |
 | ``airflow unpause``           | ``airflow dags unpause``           |    ``dags``        |
+| ``airflow next_execution``    | ``airflow dags next-execution``    |    ``dags``        |
 | ``airflow test``              | ``airflow tasks test``             |    ``tasks``       |
 | ``airflow clear``             | ``airflow tasks clear``            |    ``tasks``       |
 | ``airflow list_tasks``        | ``airflow tasks list``             |    ``tasks``       |

airflow/cli/cli_parser.py

@@ -810,7 +810,7 @@ DAGS_COMMANDS = (
         args=(ARG_DAG_ID, ARG_EXECUTION_DATE, ARG_SUBDIR),
     ),
     ActionCommand(
-        name='next_execution',
+        name='next-execution',
         help="Get the next execution datetimes of a DAG",
         description=(
             "Get the next execution datetimes of a DAG. It returns one execution unless the "

airflow/cli/commands/dag_command.py

@@ -271,7 +271,7 @@ def dag_state(args):
 def dag_next_execution(args):
     """
     Returns the next execution datetime of a DAG at the command line.
-    >>> airflow dags next_execution tutorial
+    >>> airflow dags next-execution tutorial
     2018-08-31 10:38:00
     """
     dag = get_dag(args.subdir, args.dag_id)

tests/cli/commands/test_dag_command.py

@@ -257,7 +257,7 @@ class TestCliDags(unittest.TestCase):
 
         # Test None output
         args = self.parser.parse_args(['dags',
-                                       'next_execution',
+                                       'next-execution',
                                        dag_ids[0]])
         with contextlib.redirect_stdout(io.StringIO()) as temp_stdout:
             dag_command.dag_next_execution(args)
@@ -289,7 +289,7 @@ class TestCliDags(unittest.TestCase):
 
             # Test num-executions = 1 (default)
             args = self.parser.parse_args(['dags',
-                                           'next_execution',
+                                           'next-execution',
                                            dag_id])
             with contextlib.redirect_stdout(io.StringIO()) as temp_stdout:
                 dag_command.dag_next_execution(args)
@@ -298,7 +298,7 @@ class TestCliDags(unittest.TestCase):
 
             # Test num-executions = 2
             args = self.parser.parse_args(['dags',
-                                           'next_execution',
+                                           'next-execution',
                                            dag_id,
                                            '--num-executions',
                                            '2'])