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89 lines
2.5 KiB
89 lines
2.5 KiB
/*
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Copyright The Helm Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package main
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import (
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"fmt"
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"io"
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"io/ioutil"
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"strings"
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"github.com/spf13/cobra"
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"github.com/spf13/pflag"
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"helm.sh/helm/cmd/helm/require"
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"helm.sh/helm/pkg/action"
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"helm.sh/helm/pkg/chartutil"
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"helm.sh/helm/pkg/kube"
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"helm.sh/helm/pkg/storage"
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"helm.sh/helm/pkg/storage/driver"
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)
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const templateDesc = `
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Render chart templates locally and display the output.
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This does not require Helm. However, any values that would normally be
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looked up or retrieved in-cluster will be faked locally. Additionally, none
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of the server-side testing of chart validity (e.g. whether an API is supported)
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is done.
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To render just one template in a chart, use '-x':
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$ helm template foo mychart -x templates/deployment.yaml
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`
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func newTemplateCmd(out io.Writer) *cobra.Command {
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customConfig := &action.Configuration{
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// Add mock objects in here so it doesn't use Kube API server
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Releases: storage.Init(driver.NewMemory()),
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KubeClient: &kube.PrintingKubeClient{Out: ioutil.Discard},
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Capabilities: chartutil.DefaultCapabilities,
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Log: func(format string, v ...interface{}) {
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fmt.Fprintf(out, format, v...)
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},
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}
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client := action.NewInstall(customConfig)
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cmd := &cobra.Command{
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Use: "template [NAME] [CHART]",
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Short: fmt.Sprintf("locally render templates"),
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Long: templateDesc,
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Args: require.MinimumNArgs(1),
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RunE: func(_ *cobra.Command, args []string) error {
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client.DryRun = true
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client.ReleaseName = "RELEASE-NAME"
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client.Replace = true // Skip the name check
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rel, err := runInstall(args, client, out)
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if err != nil {
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return err
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}
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fmt.Fprintln(out, strings.TrimSpace(rel.Manifest))
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return nil
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},
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}
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addInstallFlags(cmd.Flags(), client)
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addTemplateFlags(cmd.Flags(), client)
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return cmd
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}
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func addTemplateFlags(f *pflag.FlagSet, client *action.Install) {
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f.StringVar(&client.OutputDir, "output-dir", "", "writes the executed templates to files in output-dir instead of stdout")
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}
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