3 files changed, 55 insertions, 1 deletions
diff --git a/gitlab/exceptions.py b/gitlab/exceptions.py
index 6f2d4c4..66b1ee0 100644
--- a/gitlab/exceptions.py
+++ b/gitlab/exceptions.py
@@ -111,6 +111,10 @@ class GitlabProjectDeployKeyError(GitlabOperationError):
     pass
 
 
+class GitlabPromoteError(GitlabOperationError):
+    pass
+
+
 class GitlabCancelError(GitlabOperationError):
     pass
 
diff --git a/gitlab/mixins.py b/gitlab/mixins.py
index 0c2cd94..62ff6dc 100644
--- a/gitlab/mixins.py
+++ b/gitlab/mixins.py
@@ -926,3 +926,50 @@ class BadgeRenderMixin(_RestManagerBase):
         if TYPE_CHECKING:
             assert not isinstance(result, requests.Response)
         return result
+
+
+class PromoteMixin(_RestObjectBase):
+    _id_attr: Optional[str]
+    _attrs: Dict[str, Any]
+    _module: ModuleType
+    _parent_attrs: Dict[str, Any]
+    _updated_attrs: Dict[str, Any]
+    _update_uses_post: bool = False
+    manager: base.RESTManager
+
+    def _get_update_method(
+        self,
+    ) -> Callable[..., Union[Dict[str, Any], requests.Response]]:
+        """Return the HTTP method to use.
+
+        Returns:
+            object: http_put (default) or http_post
+        """
+        if self._update_uses_post:
+            http_method = self.manager.gitlab.http_post
+        else:
+            http_method = self.manager.gitlab.http_put
+        return http_method
+
+    @exc.on_http_error(exc.GitlabPromoteError)
+    def promote(self, **kwargs: Any) -> Dict[str, Any]:
+        """Promote the item.
+
+        Args:
+            **kwargs: Extra options to send to the server (e.g. sudo)
+
+        Raises:
+            GitlabAuthenticationError: If authentication is not correct
+            GitlabPromoteError: If the item could not be promoted
+            GitlabParsingError: If the json data could not be parsed
+
+        Returns:
+            dict: The updated object data (*not* a RESTObject)
+        """
+
+        path = "%s/%s/promote" % (self.manager.path, self.id)
+        http_method = self._get_update_method()
+        result = http_method(path, **kwargs)
+        if TYPE_CHECKING:
+            assert not isinstance(result, requests.Response)
+        return result
diff --git a/gitlab/v4/objects/labels.py b/gitlab/v4/objects/labels.py
index 544c3cd..99da06a 100644
--- a/gitlab/v4/objects/labels.py
+++ b/gitlab/v4/objects/labels.py
@@ -5,6 +5,7 @@ from gitlab.mixins import (
     DeleteMixin,
     ListMixin,
     ObjectDeleteMixin,
+    PromoteMixin,
     RetrieveMixin,
     SaveMixin,
     SubscribableMixin,
@@ -83,7 +84,9 @@ class GroupLabelManager(ListMixin, CreateMixin, UpdateMixin, DeleteMixin, RESTMa
         self.gitlab.http_delete(self.path, query_data={"name": name}, **kwargs)
 
 
-class ProjectLabel(SubscribableMixin, SaveMixin, ObjectDeleteMixin, RESTObject):
+class ProjectLabel(
+    PromoteMixin, SubscribableMixin, SaveMixin, ObjectDeleteMixin, RESTObject
+):
     _id_attr = "name"
 
     # Update without ID, but we need an ID to get from list.