1 files changed, 101 insertions, 0 deletions
diff --git a/lib/gitlab/kubernetes/helm/v3/base_command.rb b/lib/gitlab/kubernetes/helm/v3/base_command.rb
new file mode 100644
index 00000000000..ca1bf5462f0
--- /dev/null
+++ b/lib/gitlab/kubernetes/helm/v3/base_command.rb
@@ -0,0 +1,101 @@
+# frozen_string_literal: true
+
+module Gitlab
+  module Kubernetes
+    module Helm
+      module V3
+        class BaseCommand
+          attr_reader :name, :files
+
+          HELM_VERSION = '3.2.4'
+
+          def initialize(rbac:, name:, files:)
+            @rbac = rbac
+            @name = name
+            @files = files
+          end
+
+          def env
+            {}
+          end
+
+          def rbac?
+            @rbac
+          end
+
+          def pod_resource
+            pod_service_account_name = rbac? ? service_account_name : nil
+
+            Gitlab::Kubernetes::Helm::Pod.new(self, namespace, service_account_name: pod_service_account_name).generate
+          end
+
+          def generate_script
+            <<~HEREDOC
+              set -xeo pipefail
+            HEREDOC
+          end
+
+          def pod_name
+            "install-#{name}"
+          end
+
+          def config_map_resource
+            Gitlab::Kubernetes::ConfigMap.new(name, files).generate
+          end
+
+          def service_account_resource
+            return unless rbac?
+
+            Gitlab::Kubernetes::ServiceAccount.new(service_account_name, namespace).generate
+          end
+
+          def cluster_role_binding_resource
+            return unless rbac?
+
+            subjects = [{ kind: 'ServiceAccount', name: service_account_name, namespace: namespace }]
+
+            Gitlab::Kubernetes::ClusterRoleBinding.new(
+              cluster_role_binding_name,
+              cluster_role_name,
+              subjects
+            ).generate
+          end
+
+          def file_names
+            files.keys
+          end
+
+          def repository_command
+            ['helm', 'repo', 'add', name, repository].shelljoin if repository
+          end
+
+          private
+
+          def repository_update_command
+            'helm repo update'
+          end
+
+          def namespace_flag
+            ['--namespace', Gitlab::Kubernetes::Helm::NAMESPACE]
+          end
+
+          def namespace
+            Gitlab::Kubernetes::Helm::NAMESPACE
+          end
+
+          def service_account_name
+            Gitlab::Kubernetes::Helm::SERVICE_ACCOUNT
+          end
+
+          def cluster_role_binding_name
+            Gitlab::Kubernetes::Helm::CLUSTER_ROLE_BINDING
+          end
+
+          def cluster_role_name
+            Gitlab::Kubernetes::Helm::CLUSTER_ROLE
+          end
+        end
+      end
+    end
+  end
+end