Updates cancel pipeline mutation

* Moves pipeline field to base mutation
* Updates specs
* Adds a changelog

app/graphql/mutations/ci/pipeline_cancel.rb

@@ -2,18 +2,20 @@
 
 module Mutations
   module Ci
-    class PipelineCancel < BaseMutation
+    class PipelineCancel < Base
       graphql_name 'PipelineCancel'
 
       authorize :update_pipeline
 
-      def resolve
-        result = ::Ci::CancelUserPipelinesService.new.execute(current_user)
+      def resolve(id:)
+        pipeline = authorized_find!(id: id)
 
-        {
-          success: result.success?,
-          errors: [result&.message]
-        }
+        if pipeline.cancelable?
+          pipeline.cancel_running
+          { success: true, errors: [] }
+        else
+          { success: false, errors: ['Pipeline is not cancelable'] }
+        end
       end
     end
   end

changelogs/unreleased/lm-update-pipeline-mutation.yml

+---
+title: 'GraphQL: Updates PipelineCancel mutation'
+merge_request: 40764
+author:
+type: changed

doc/api/graphql/reference/gitlab_schema.graphql

@@ -10656,6 +10656,11 @@ input PipelineCancelInput {
   A unique identifier for the client performing the mutation.
   """
   clientMutationId: String
+
+  """
+  The id of the pipeline to mutate
+  """
+  id: CiPipelineID!
 }
 
 """

doc/api/graphql/reference/gitlab_schema.json

@@ -31967,6 +31967,20 @@
           "description": "Autogenerated input type of PipelineCancel",
           "fields": null,
           "inputFields": [
+            {
+              "name": "id",
+              "description": "The id of the pipeline to mutate",
+              "type": {
+                "kind": "NON_NULL",
+                "name": null,
+                "ofType": {
+                  "kind": "SCALAR",
+                  "name": "CiPipelineID",
+                  "ofType": null
+                }
+              },
+              "defaultValue": null
+            },
             {
               "name": "clientMutationId",
               "description": "A unique identifier for the client performing the mutation.",

spec/requests/api/graphql/mutations/ci/pipeline_cancel_spec.rb

@@ -7,9 +7,14 @@ RSpec.describe 'PipelineCancel' do
 
   let_it_be(:user) { create(:user) }
   let_it_be(:project) { create(:project) }
-  let_it_be(:pipeline) { create(:ci_pipeline, :running, project: project, user: user) }
+  let_it_be(:pipeline) { create(:ci_pipeline, project: project, user: user) }
 
-  let(:mutation) { graphql_mutation(:pipeline_cancel, {}, 'errors') }
+  let(:mutation) do
+    variables = {
+      id: pipeline.to_global_id.to_s
+    }
+    graphql_mutation(:pipeline_cancel, variables, 'errors')
+  end
 
   let(:mutation_response) { graphql_mutation_response(:pipeline_cancel) }
 
@@ -17,24 +22,25 @@ RSpec.describe 'PipelineCancel' do
     project.add_maintainer(user)
   end
 
-  it 'reports the service-level error' do
-    service = double(execute: ServiceResponse.error(message: 'Error canceling pipeline'))
-    allow(::Ci::CancelUserPipelinesService).to receive(:new).and_return(service)
+  it 'does not cancel any pipelines not owned by the current user' do
+    build = create(:ci_build, :running, pipeline: pipeline)
 
     post_graphql_mutation(mutation, current_user: create(:user))
 
-    expect(mutation_response).to include('errors' => ['Error canceling pipeline'])
+    expect(graphql_errors).not_to be_empty
+    expect(build).not_to be_canceled
   end
 
-  it 'does not change any pipelines not owned by the current user' do
-    build = create(:ci_build, :running, pipeline: pipeline)
+  it 'returns a error if the pipline cannot be be canceled' do
+    build = create(:ci_build, :success, pipeline: pipeline)
 
-    post_graphql_mutation(mutation, current_user: create(:user))
+    post_graphql_mutation(mutation, current_user: user)
 
+    expect(mutation_response).to include('errors' => include(eq 'Pipeline is not cancelable'))
     expect(build).not_to be_canceled
   end
 
-  it "cancels all of the current user's cancelable pipelines" do
+  it "cancels all cancelable builds from a pipeline" do
     build = create(:ci_build, :running, pipeline: pipeline)
 
     post_graphql_mutation(mutation, current_user: user)