fix: parse respawn_max_retries YAML strings

launch/launch/actions/execute_process.py

@@ -365,6 +365,19 @@ def parse(
             respawn_max_retries = entity.get_attr('respawn_max_retries', data_type=int,
                                                   optional=True)
             if respawn_max_retries is not None:
+                if isinstance(respawn_max_retries, bool):
+                    raise ValueError(
+                        'Attribute respawn_max_retries of Entity `{}` expected to be '
+                        'an integer but got `{}`'.format(entity.type_name, respawn_max_retries)
+                    )
+                if isinstance(respawn_max_retries, str):
+                    try:
+                        respawn_max_retries = int(respawn_max_retries)
+                    except ValueError:
+                        raise ValueError(
+                            'Attribute respawn_max_retries of Entity `{}` expected to be '
+                            'an integer but got `{}`'.format(entity.type_name, respawn_max_retries)
+                        ) from None
                 kwargs['respawn_max_retries'] = respawn_max_retries
 
         if 'respawn_delay' not in ignore:

launch_yaml/test/launch_yaml/test_executable.py

@@ -19,6 +19,9 @@
 
 from launch import LaunchService
 from launch.actions import Shutdown
+from launch.actions.execute_process import ExecuteProcess
+
+import pytest
 
 from parser_no_extensions import load_no_extensions
 
@@ -82,5 +85,51 @@ def test_executable_on_exit():
     assert isinstance(sub_entities[0], Shutdown)
 
 
+def test_executable_respawn_max_retries_string_zero():
+    yaml_file = \
+        """\
+        launch:
+        -   executable:
+                cmd: echo test
+                respawn_max_retries: '0'
+        """
+    yaml_file = textwrap.dedent(yaml_file)
+    root_entity, parser = load_no_extensions(io.StringIO(yaml_file))
+    _, kwargs = ExecuteProcess.parse(root_entity.children[0], parser)
+
+    assert kwargs['respawn_max_retries'] == 0
+    assert isinstance(kwargs['respawn_max_retries'], int)
+
+
+def test_executable_respawn_max_retries_empty_string_error():
+    yaml_file = \
+        """\
+        launch:
+        -   executable:
+                cmd: echo test
+                respawn_max_retries: ''
+        """
+    yaml_file = textwrap.dedent(yaml_file)
+    root_entity, parser = load_no_extensions(io.StringIO(yaml_file))
+
+    with pytest.raises(ValueError, match='respawn_max_retries'):
+        ExecuteProcess.parse(root_entity.children[0], parser)
+
+
+def test_executable_respawn_max_retries_bool_error():
+    yaml_file = \
+        """\
+        launch:
+        -   executable:
+                cmd: echo test
+                respawn_max_retries: true
+        """
+    yaml_file = textwrap.dedent(yaml_file)
+    root_entity, parser = load_no_extensions(io.StringIO(yaml_file))
+
+    with pytest.raises(ValueError, match='respawn_max_retries'):
+        ExecuteProcess.parse(root_entity.children[0], parser)
+
+
 if __name__ == '__main__':
     test_executable()