github.com/danielqsj/helm@v2.0.0-alpha.4.0.20160908204436-976e0ba5199b+incompatible/cmd/helm/update.go (about) 1 /* 2 Copyright 2016 The Kubernetes Authors All rights reserved. 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 "errors" 21 "fmt" 22 "io" 23 "sync" 24 25 "github.com/spf13/cobra" 26 27 "k8s.io/helm/pkg/repo" 28 ) 29 30 const updateDesc = ` 31 Update gets the latest information about charts from the respective chart repositories. 32 Information is cached locally, where it is used by commands like 'helm search'. 33 ` 34 35 type updateCmd struct { 36 repoFile string 37 update func(map[string]string, bool, io.Writer) 38 out io.Writer 39 } 40 41 func newUpdateCmd(out io.Writer) *cobra.Command { 42 u := &updateCmd{ 43 out: out, 44 update: updateCharts, 45 repoFile: repositoriesFile(), 46 } 47 cmd := &cobra.Command{ 48 Use: "update", 49 Aliases: []string{"up"}, 50 Short: "update information on available charts in the chart repositories", 51 Long: updateDesc, 52 RunE: func(cmd *cobra.Command, args []string) error { 53 return u.run() 54 }, 55 } 56 return cmd 57 } 58 59 func (u *updateCmd) run() error { 60 f, err := repo.LoadRepositoriesFile(u.repoFile) 61 if err != nil { 62 return err 63 } 64 65 if len(f.Repositories) == 0 { 66 return errors.New("no repositories found. You must add one before updating") 67 } 68 69 u.update(f.Repositories, flagDebug, u.out) 70 return nil 71 } 72 73 func updateCharts(repos map[string]string, verbose bool, out io.Writer) { 74 fmt.Fprintln(out, "Hang tight while we grab the latest from your chart repositories...") 75 var wg sync.WaitGroup 76 for name, url := range repos { 77 wg.Add(1) 78 go func(n, u string) { 79 defer wg.Done() 80 err := repo.DownloadIndexFile(n, u, cacheIndexFile(n)) 81 if err != nil { 82 updateErr := fmt.Sprintf("...Unable to get an update from the %q chart repository", n) 83 if verbose { 84 updateErr = updateErr + ": " + err.Error() 85 } 86 fmt.Fprintln(out, updateErr) 87 } else { 88 fmt.Fprintf(out, "...Successfully got an update from the %q chart repository\n", n) 89 } 90 }(name, url) 91 } 92 wg.Wait() 93 fmt.Fprintln(out, "Update Complete. Happy Helming!") 94 }