1 files changed, 53 insertions, 0 deletions
diff --git a/lib/gitlab/kubernetes/helm/install_command.rb b/lib/gitlab/kubernetes/helm/install_command.rb
new file mode 100644
index 00000000000..8d8c441a4b1
--- /dev/null
+++ b/lib/gitlab/kubernetes/helm/install_command.rb
@@ -0,0 +1,53 @@
+module Gitlab
+  module Kubernetes
+    module Helm
+      class InstallCommand
+        attr_reader :name, :install_helm, :chart, :chart_values_file
+
+        def initialize(name, install_helm: false, chart: false, chart_values_file: false)
+          @name = name
+          @install_helm = install_helm
+          @chart = chart
+          @chart_values_file = chart_values_file
+        end
+
+        def pod_name
+          "install-#{name}"
+        end
+
+        def generate_script(namespace_name)
+          [
+            install_dps_command,
+            init_command,
+            complete_command(namespace_name)
+          ].join("\n")
+        end
+
+        private
+
+        def init_command
+          if install_helm
+            'helm init >/dev/null'
+          else
+            'helm init --client-only >/dev/null'
+          end
+        end
+
+        def complete_command(namespace_name)
+          return unless chart
+
+          "helm install #{chart} --name #{name} --namespace #{namespace_name} >/dev/null"
+        end
+
+        def install_dps_command
+          <<~HEREDOC
+            set -eo pipefail
+            apk add -U ca-certificates openssl >/dev/null
+            wget -q -O - https://kubernetes-helm.storage.googleapis.com/helm-v#{Gitlab::Kubernetes::Helm::HELM_VERSION}-linux-amd64.tar.gz | tar zxC /tmp >/dev/null
+            mv /tmp/linux-amd64/helm /usr/bin/
+          HEREDOC
+        end
+      end
+    end
+  end
+end