github.com/justincormack/cli@v0.0.0-20201215022714-831ebeae9675/cli/command/node/list.go (about) 1 package node 2 3 import ( 4 "context" 5 "sort" 6 7 "github.com/docker/cli/cli" 8 "github.com/docker/cli/cli/command" 9 "github.com/docker/cli/cli/command/formatter" 10 "github.com/docker/cli/opts" 11 "github.com/docker/docker/api/types" 12 "github.com/fvbommel/sortorder" 13 "github.com/spf13/cobra" 14 ) 15 16 type listOptions struct { 17 quiet bool 18 format string 19 filter opts.FilterOpt 20 } 21 22 func newListCommand(dockerCli command.Cli) *cobra.Command { 23 options := listOptions{filter: opts.NewFilterOpt()} 24 25 cmd := &cobra.Command{ 26 Use: "ls [OPTIONS]", 27 Aliases: []string{"list"}, 28 Short: "List nodes in the swarm", 29 Args: cli.NoArgs, 30 RunE: func(cmd *cobra.Command, args []string) error { 31 return runList(dockerCli, options) 32 }, 33 } 34 flags := cmd.Flags() 35 flags.BoolVarP(&options.quiet, "quiet", "q", false, "Only display IDs") 36 flags.StringVar(&options.format, "format", "", "Pretty-print nodes using a Go template") 37 flags.VarP(&options.filter, "filter", "f", "Filter output based on conditions provided") 38 39 return cmd 40 } 41 42 func runList(dockerCli command.Cli, options listOptions) error { 43 client := dockerCli.Client() 44 ctx := context.Background() 45 46 nodes, err := client.NodeList( 47 ctx, 48 types.NodeListOptions{Filters: options.filter.Value()}) 49 if err != nil { 50 return err 51 } 52 53 info := types.Info{} 54 if len(nodes) > 0 && !options.quiet { 55 // only non-empty nodes and not quiet, should we call /info api 56 info, err = client.Info(ctx) 57 if err != nil { 58 return err 59 } 60 } 61 62 format := options.format 63 if len(format) == 0 { 64 format = formatter.TableFormatKey 65 if len(dockerCli.ConfigFile().NodesFormat) > 0 && !options.quiet { 66 format = dockerCli.ConfigFile().NodesFormat 67 } 68 } 69 70 nodesCtx := formatter.Context{ 71 Output: dockerCli.Out(), 72 Format: NewFormat(format, options.quiet), 73 } 74 sort.Slice(nodes, func(i, j int) bool { 75 return sortorder.NaturalLess(nodes[i].Description.Hostname, nodes[j].Description.Hostname) 76 }) 77 return FormatWrite(nodesCtx, nodes, info) 78 }