feat: add endpoint to get the variables of a pipeline

It adds a new endpoint which was released in the Gitlab CE 11.11.

Signed-off-by: Agustin Henze <tin@redhat.com>

2 files changed, 18 insertions, 1 deletions

diff --git a/docs/gl_objects/builds.rst b/docs/gl_objects/builds.rst
index ee45090..dfb9acc 100644
--- a/docs/gl_objects/builds.rst
+++ b/docs/gl_objects/builds.rst
@@ -29,6 +29,10 @@ Get a pipeline for a project::
 
     pipeline = project.pipelines.get(pipeline_id)
 
+Get variables of a pipeline::
+
+    variables = pipeline.variables.list()
+
 Create a pipeline for a particular reference::
 
     pipeline = project.pipelines.create({'ref': 'master'})
diff --git a/gitlab/v4/objects.py b/gitlab/v4/objects.py
index 16a3da8..8fc7150 100644
--- a/gitlab/v4/objects.py
+++ b/gitlab/v4/objects.py
@@ -3100,8 +3100,21 @@ class ProjectPipelineJobManager(ListMixin, RESTManager):
     _list_filters = ("scope",)
 
 
+class ProjectPipelineVariable(RESTObject):
+    _id_attr = "key"
+
+
+class ProjectPipelineVariableManager(ListMixin, RESTManager):
+    _path = "/projects/%(project_id)s/pipelines/%(pipeline_id)s/variables"
+    _obj_cls = ProjectPipelineVariable
+    _from_parent_attrs = {"project_id": "project_id", "pipeline_id": "id"}
+
+
 class ProjectPipeline(RESTObject, RefreshMixin, ObjectDeleteMixin):
-    _managers = (("jobs", "ProjectPipelineJobManager"),)
+    _managers = (
+        ("jobs", "ProjectPipelineJobManager"),
+        ("variables", "ProjectPipelineVariableManager"),
+    )
 
     @cli.register_custom_action("ProjectPipeline")
     @exc.on_http_error(exc.GitlabPipelineCancelError)