github.com/Racer159/helm-experiment@v0.0.0-20230822001441-1eb31183f614/src/get_manifest.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 cmd
    18  
    19  import (
    20  	"fmt"
    21  	"io"
    22  	"log"
    23  
    24  	"github.com/spf13/cobra"
    25  
    26  	"helm.sh/helm/v3/cmd/helm/require"
    27  	"helm.sh/helm/v3/pkg/action"
    28  )
    29  
    30  var getManifestHelp = `
    31  This command fetches the generated manifest for a given release.
    32  
    33  A manifest is a YAML-encoded representation of the Kubernetes resources that
    34  were generated from this release's chart(s). If a chart is dependent on other
    35  charts, those resources will also be included in the manifest.
    36  `
    37  
    38  func newGetManifestCmd(cfg *action.Configuration, out io.Writer) *cobra.Command {
    39  	client := action.NewGet(cfg)
    40  
    41  	cmd := &cobra.Command{
    42  		Use:   "manifest RELEASE_NAME",
    43  		Short: "download the manifest for a named release",
    44  		Long:  getManifestHelp,
    45  		Args:  require.ExactArgs(1),
    46  		ValidArgsFunction: func(cmd *cobra.Command, args []string, toComplete string) ([]string, cobra.ShellCompDirective) {
    47  			if len(args) != 0 {
    48  				return nil, cobra.ShellCompDirectiveNoFileComp
    49  			}
    50  			return compListReleases(toComplete, args, cfg)
    51  		},
    52  		RunE: func(cmd *cobra.Command, args []string) error {
    53  			res, err := client.Run(args[0])
    54  			if err != nil {
    55  				return err
    56  			}
    57  			fmt.Fprintln(out, res.Manifest)
    58  			return nil
    59  		},
    60  	}
    61  
    62  	cmd.Flags().IntVar(&client.Version, "revision", 0, "get the named release with revision")
    63  	err := cmd.RegisterFlagCompletionFunc("revision", func(cmd *cobra.Command, args []string, toComplete string) ([]string, cobra.ShellCompDirective) {
    64  		if len(args) == 1 {
    65  			return compListRevisions(toComplete, cfg, args[0])
    66  		}
    67  		return nil, cobra.ShellCompDirectiveNoFileComp
    68  	})
    69  
    70  	if err != nil {
    71  		log.Fatal(err)
    72  	}
    73  
    74  	return cmd
    75  }