feat(namespaces): add support for namespace existence API

1 files changed, 26 insertions, 1 deletions

diff --git a/gitlab/v4/objects/namespaces.py b/gitlab/v4/objects/namespaces.py
index 91a1850..8957a5c 100644
--- a/gitlab/v4/objects/namespaces.py
+++ b/gitlab/v4/objects/namespaces.py
@@ -1,7 +1,10 @@
-from typing import Any, cast, Union
+from typing import Any, cast, TYPE_CHECKING, Union
 
+from gitlab import cli
+from gitlab import exceptions as exc
 from gitlab.base import RESTManager, RESTObject
 from gitlab.mixins import RetrieveMixin
+from gitlab.utils import EncodedId
 
 __all__ = [
     "Namespace",
@@ -20,3 +23,25 @@ class NamespaceManager(RetrieveMixin, RESTManager):
 
     def get(self, id: Union[str, int], lazy: bool = False, **kwargs: Any) -> Namespace:
         return cast(Namespace, super().get(id=id, lazy=lazy, **kwargs))
+
+    @cli.register_custom_action("NamespaceManager", ("namespace", "parent_id"))
+    @exc.on_http_error(exc.GitlabGetError)
+    def exists(self, namespace: str, **kwargs: Any) -> Namespace:
+        """Get existence of a namespace by path.
+
+        Args:
+            namespace: The path to the namespace.
+            **kwargs: Extra options to send to the server (e.g. sudo)
+
+        Raises:
+            GitlabAuthenticationError: If authentication is not correct
+            GitlabGetError: If the server failed to perform the request
+
+        Returns:
+            Data on namespace existence returned from the server.
+        """
+        path = f"{self.path}/{EncodedId(namespace)}/exists"
+        server_data = self.gitlab.http_get(path, **kwargs)
+        if TYPE_CHECKING:
+            assert isinstance(server_data, dict)
+        return self._obj_cls(self, server_data)