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apply_channel.go
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apply_channel.go
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package main
import (
"fmt"
"github.com/spf13/cobra"
"k8s.io/kops/channels/pkg/channels"
"k8s.io/kops/util/pkg/tables"
"net/url"
"os"
"strings"
)
type ApplyChannelCmd struct {
Yes bool
Files []string
}
var applyChannel ApplyChannelCmd
func init() {
cmd := &cobra.Command{
Use: "channel",
Short: "Apply channel",
Run: func(cmd *cobra.Command, args []string) {
err := applyChannel.Run(args)
if err != nil {
exitWithError(err)
}
},
}
cmd.Flags().BoolVar(&applyChannel.Yes, "yes", false, "Apply update")
cmd.Flags().StringSliceVar(&applyChannel.Files, "f", []string{}, "Apply from a local file")
applyCmd.AddCommand(cmd)
}
func (c *ApplyChannelCmd) Run(args []string) error {
k8sClient, err := rootCommand.KubernetesClient()
if err != nil {
return err
}
var addons []*channels.Addon
for _, name := range args {
location, err := url.Parse(name)
if err != nil {
return fmt.Errorf("unable to parse argument %q as url", name)
}
if !location.IsAbs() {
// We recognize the following "well-known" format:
// <name> with no slashes ->
if strings.Contains(name, "/") {
return fmt.Errorf("Channel format not recognized (did you mean to use `-f` to specify a local file?): %q", name)
}
expanded := "https://raw.githubusercontent.com/kubernetes/kops/master/addons/" + name + "/addon.yaml"
location, err = url.Parse(expanded)
if err != nil {
return fmt.Errorf("unable to parse expanded argument %q as url", expanded)
}
}
o, err := channels.LoadAddons(name, location)
if err != nil {
return fmt.Errorf("error loading channel: %v", location, err)
}
current, err := o.GetCurrent()
if err != nil {
return fmt.Errorf("error processing latest versions in %q: %v", location, err)
}
addons = append(addons, current...)
}
for _, f := range c.Files {
location, err := url.Parse(f)
if err != nil {
return fmt.Errorf("unable to parse argument %q as url", f)
}
if !location.IsAbs() {
cwd, err := os.Getwd()
if err != nil {
return fmt.Errorf("error getting current directory: %v", err)
}
baseURL, err := url.Parse(cwd + string(os.PathSeparator))
if err != nil {
return fmt.Errorf("error building url for current directory %q: %v", cwd, err)
}
location = baseURL.ResolveReference(location)
}
o, err := channels.LoadAddons(f, location)
if err != nil {
return fmt.Errorf("error loading file %q: %v", f, err)
}
current, err := o.GetCurrent()
if err != nil {
return fmt.Errorf("error processing latest versions in %q: %v", f, err)
}
addons = append(addons, current...)
}
var updates []*channels.AddonUpdate
var needUpdates []*channels.Addon
for _, addon := range addons {
// TODO: Cache lookups to prevent repeated lookups?
update, err := addon.GetRequiredUpdates(k8sClient)
if err != nil {
return fmt.Errorf("error checking for required update: %v", err)
}
if update != nil {
updates = append(updates, update)
needUpdates = append(needUpdates, addon)
}
}
if len(updates) == 0 {
fmt.Printf("No update required\n")
return nil
}
{
t := &tables.Table{}
t.AddColumn("NAME", func(r *channels.AddonUpdate) string {
return r.Name
})
t.AddColumn("CURRENT", func(r *channels.AddonUpdate) string {
if r.ExistingVersion == nil {
return "-"
}
if r.ExistingVersion.Version != nil {
return *r.ExistingVersion.Version
}
return "?"
})
t.AddColumn("UPDATE", func(r *channels.AddonUpdate) string {
if r.NewVersion == nil {
return "-"
}
if r.NewVersion.Version != nil {
return *r.NewVersion.Version
}
return "?"
})
columns := []string{"NAME", "CURRENT", "UPDATE"}
err := t.Render(updates, os.Stdout, columns...)
if err != nil {
return err
}
}
if !c.Yes {
fmt.Printf("\nMust specify --yes to update\n")
return nil
}
for _, needUpdate := range needUpdates {
update, err := needUpdate.EnsureUpdated(k8sClient)
if err != nil {
return fmt.Errorf("error updating %q: %v", needUpdate.Name, err)
}
if update.NewVersion.Version != nil {
fmt.Printf("Updated %q to %d\n", update.Name, *update.NewVersion)
} else {
fmt.Printf("Updated %q\n", update.Name)
}
}
fmt.Printf("\n")
return nil
}