github.com/nickgerace/rancher-helm@v3.0.0-beta.3+incompatible/cmd/helm/template.go (about) 1 /* 2 Copyright The Helm Authors. 3 4 Licensed under the Apache License, Version 2.0 (the "License"); 5 you may not use this file except in compliance with the License. 6 You may obtain a copy of the License at 7 8 http://www.apache.org/licenses/LICENSE-2.0 9 10 Unless required by applicable law or agreed to in writing, software 11 distributed under the License is distributed on an "AS IS" BASIS, 12 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 See the License for the specific language governing permissions and 14 limitations under the License. 15 */ 16 17 package main 18 19 import ( 20 "fmt" 21 "io" 22 "strings" 23 24 "github.com/spf13/cobra" 25 26 "helm.sh/helm/cmd/helm/require" 27 "helm.sh/helm/pkg/action" 28 "helm.sh/helm/pkg/cli/values" 29 ) 30 31 const templateDesc = ` 32 Render chart templates locally and display the output. 33 34 Any values that would normally be looked up or retrieved in-cluster will be 35 faked locally. Additionally, none of the server-side testing of chart validity 36 (e.g. whether an API is supported) is done. 37 ` 38 39 func newTemplateCmd(cfg *action.Configuration, out io.Writer) *cobra.Command { 40 var validate bool 41 client := action.NewInstall(cfg) 42 valueOpts := &values.Options{} 43 44 cmd := &cobra.Command{ 45 Use: "template [NAME] [CHART]", 46 Short: fmt.Sprintf("locally render templates"), 47 Long: templateDesc, 48 Args: require.MinimumNArgs(1), 49 RunE: func(_ *cobra.Command, args []string) error { 50 client.DryRun = true 51 client.ReleaseName = "RELEASE-NAME" 52 client.Replace = true // Skip the name check 53 client.ClientOnly = !validate 54 rel, err := runInstall(args, client, valueOpts, out) 55 if err != nil { 56 return err 57 } 58 fmt.Fprintln(out, strings.TrimSpace(rel.Manifest)) 59 return nil 60 }, 61 } 62 63 f := cmd.Flags() 64 addInstallFlags(f, client, valueOpts) 65 f.StringVar(&client.OutputDir, "output-dir", "", "writes the executed templates to files in output-dir instead of stdout") 66 f.BoolVar(&validate, "validate", false, "establish a connection to Kubernetes for schema validation") 67 68 return cmd 69 }