Add RunnersRegistrationToken::Reset mutation

Add matching `:reset_runners_registration_token` ability

app/graphql/mutations/ci/runners_registration_token/reset.rb

+# frozen_string_literal: true
+
+module Mutations
+  module Ci
+    module RunnersRegistrationToken
+      class Reset < BaseMutation
+        graphql_name 'RunnersRegistrationTokenReset'
+
+        authorize :reset_runners_registration_token
+
+        argument :full_path, GraphQL::ID_TYPE,
+          required: false,
+          description: 'Full path of the project or group to reset the token for. Omit if resetting instance runner token.'
+
+        field :token,
+          GraphQL::STRING_TYPE,
+          null: true,
+          description: 'The runner token after mutation.'
+
+        def resolve(**args)
+          full_path = args[:full_path]
+          scope = full_path.blank? ? :global : authorized_find!(full_path: full_path)
+
+          if scope == :global
+            authorize!(scope)
+
+            ApplicationSetting.current.reset_runners_registration_token!
+
+            token = ApplicationSetting.current.runners_registration_token
+          else
+            scope.reset_runners_token!
+            token = scope.runners_token
+          end
+
+          {
+            token: token,
+            errors: []
+          }
+        end
+
+        private
+
+        def find_object(full_path:)
+          return unless full_path
+
+          GitlabSchema.object_from_id(full_path, expected_type: [::Project, ::Group])
+        end
+      end
+    end
+  end
+end

app/graphql/types/mutation_type.rb

@@ -101,6 +101,7 @@ module Types
     mount_mutation Mutations::Ci::Job::Retry
     mount_mutation Mutations::Ci::Runner::Update, feature_flag: :runner_graphql_query
     mount_mutation Mutations::Ci::Runner::Delete, feature_flag: :runner_graphql_query
+    mount_mutation Mutations::Ci::RunnersRegistrationToken::Reset, feature_flag: :runner_graphql_query
     mount_mutation Mutations::Namespace::PackageSettings::Update
     mount_mutation Mutations::UserCallouts::Create
   end

app/policies/global_policy.rb

@@ -115,6 +115,7 @@ class GlobalPolicy < BasePolicy
     enable :approve_user
     enable :reject_user
     enable :read_usage_trends_measurement
+    enable :reset_runners_registration_token
   end
 
   # We can't use `read_statistics` because the user may have different permissions for different projects

app/policies/group_policy.rb

@@ -144,6 +144,7 @@ class GroupPolicy < BasePolicy
     enable :admin_cluster
     enable :read_deploy_token
     enable :create_jira_connect_subscription
+    enable :reset_runners_registration_token
   end
 
   rule { owner }.policy do

app/policies/project_policy.rb

@@ -419,6 +419,7 @@ class ProjectPolicy < BasePolicy
     enable :update_freeze_period
     enable :destroy_freeze_period
     enable :admin_feature_flags_client
+    enable :reset_runners_registration_token
   end
 
   rule { public_project & metrics_dashboard_allowed }.policy do

doc/api/graphql/reference/index.md

@@ -3527,6 +3527,27 @@ Input type: `RunnerUpdateInput`
 | <a id="mutationrunnerupdateerrors"></a>`errors` | [`[String!]!`](#string) | Errors encountered during execution of the mutation. |
 | <a id="mutationrunnerupdaterunner"></a>`runner` | [`CiRunner`](#cirunner) | The runner after mutation. |
 
+### `Mutation.runnersRegistrationTokenReset`
+
+Available only when feature flag `runner_graphql_query` is enabled.
+
+Input type: `RunnersRegistrationTokenResetInput`
+
+#### Arguments
+
+| Name | Type | Description |
+| ---- | ---- | ----------- |
+| <a id="mutationrunnersregistrationtokenresetclientmutationid"></a>`clientMutationId` | [`String`](#string) | A unique identifier for the client performing the mutation. |
+| <a id="mutationrunnersregistrationtokenresetfullpath"></a>`fullPath` | [`ID`](#id) | Full path of the project or group to reset the token for. Omit if resetting instance runner token. |
+
+#### Fields
+
+| Name | Type | Description |
+| ---- | ---- | ----------- |
+| <a id="mutationrunnersregistrationtokenresetclientmutationid"></a>`clientMutationId` | [`String`](#string) | A unique identifier for the client performing the mutation. |
+| <a id="mutationrunnersregistrationtokenreseterrors"></a>`errors` | [`[String!]!`](#string) | Errors encountered during execution of the mutation. |
+| <a id="mutationrunnersregistrationtokenresettoken"></a>`token` | [`String`](#string) | The runner token after mutation. |
+
 ### `Mutation.terraformStateDelete`
 
 Input type: `TerraformStateDeleteInput`

spec/requests/api/graphql/mutations/ci/runners_registration_token/reset_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe 'RunnersRegistrationTokenReset' do
+  include GraphqlHelpers
+
+  let(:mutation) { graphql_mutation(:runners_registration_token_reset, input) }
+
+  def mutation_response
+    graphql_mutation_response(:runners_registration_token_reset)
+  end
+
+  subject { post_graphql_mutation(mutation, current_user: user) }
+
+  shared_examples 'unauthorized' do
+    it 'returns an error' do
+      subject
+
+      expect(graphql_errors).not_to be_empty
+      expect(graphql_errors).to include(a_hash_including('message' => "The resource that you are attempting to access does not exist or you don't have permission to perform this action"))
+    end
+  end
+
+  shared_context 'when unauthorized' do |scope|
+    context 'when unauthorized' do
+      let_it_be(:user) { create(:user) }
+
+      context "when not a #{scope} member" do
+        it_behaves_like 'unauthorized'
+      end
+
+      context "with a non-admin #{scope} member" do
+        before do
+          target.add_developer(user)
+        end
+
+        it_behaves_like 'unauthorized'
+      end
+    end
+  end
+
+  shared_context 'when authorized' do
+    it 'resets runner registration token' do
+      expect { subject }.to change { get_token }
+      expect(response).to have_gitlab_http_status(:success)
+
+      expect(mutation_response).not_to be_nil
+      expect(mutation_response['errors']).to be_empty
+      expect(mutation_response['token']).not_to be_empty
+      expect(mutation_response['token']).to eq(get_token)
+    end
+
+    context 'when bad arguments are provided' do
+      let(:input) { { full_path: 'some string' } }
+
+      it 'returns errors' do
+        expect { subject }.not_to change { get_token }
+
+        expect(graphql_errors).not_to be_empty
+        expect(mutation_response).to be_nil
+      end
+    end
+  end
+
+  context 'applied to project' do
+    let_it_be(:project) { create_default(:project) }
+
+    let(:input) { { full_path: project.to_global_id.to_s } }
+
+    include_context 'when unauthorized', 'project' do
+      let(:target) { project }
+    end
+
+    include_context 'when authorized' do
+      let_it_be(:user) { project.owner }
+
+      def get_token
+        project.reload.runners_token
+      end
+    end
+  end
+
+  context 'applied to group' do
+    let_it_be(:group) { create_default(:group) }
+
+    let(:input) { { full_path: group.to_global_id.to_s } }
+
+    include_context 'when unauthorized', 'group' do
+      let(:target) { group }
+    end
+
+    include_context 'when authorized' do
+      let_it_be(:user) { create_default(:group_member, :maintainer, user: create(:user), group: group ).user }
+
+      def get_token
+        group.reload.runners_token
+      end
+    end
+  end
+
+  context 'applied to instance' do
+    before do
+      ApplicationSetting.create_from_defaults
+      stub_env('IN_MEMORY_APPLICATION_SETTINGS', 'false')
+    end
+
+    let(:input) { {} }
+
+    context 'when unauthorized' do
+      let(:user) { create(:user) }
+
+      it_behaves_like 'unauthorized'
+    end
+
+    include_context 'when authorized' do
+      let_it_be(:user) { create(:user, :admin) }
+
+      def get_token
+        ApplicationSetting.current_without_cache.runners_registration_token
+      end
+    end
+  end
+end