DockerCLI/cli/command/node/list.go

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package node
import (
"context"
"sort"
"github.com/docker/cli/cli"
"github.com/docker/cli/cli/command"
"github.com/docker/cli/cli/command/completion"
"github.com/docker/cli/cli/command/formatter"
flagsHelper "github.com/docker/cli/cli/flags"
"github.com/docker/cli/opts"
"github.com/docker/docker/api/types"
"github.com/fvbommel/sortorder"
"github.com/spf13/cobra"
)
type listOptions struct {
quiet bool
format string
filter opts.FilterOpt
}
func newListCommand(dockerCli command.Cli) *cobra.Command {
options := listOptions{filter: opts.NewFilterOpt()}
cmd := &cobra.Command{
Use: "ls [OPTIONS]",
Aliases: []string{"list"},
Short: "List nodes in the swarm",
Args: cli.NoArgs,
RunE: func(cmd *cobra.Command, args []string) error {
return runList(dockerCli, options)
},
ValidArgsFunction: completion.NoComplete,
}
flags := cmd.Flags()
flags.BoolVarP(&options.quiet, "quiet", "q", false, "Only display IDs")
flags.StringVar(&options.format, "format", "", flagsHelper.FormatHelp)
flags.VarP(&options.filter, "filter", "f", "Filter output based on conditions provided")
return cmd
}
func runList(dockerCli command.Cli, options listOptions) error {
client := dockerCli.Client()
ctx := context.Background()
nodes, err := client.NodeList(
ctx,
types.NodeListOptions{Filters: options.filter.Value()})
if err != nil {
return err
}
info := types.Info{}
if len(nodes) > 0 && !options.quiet {
// only non-empty nodes and not quiet, should we call /info api
info, err = client.Info(ctx)
if err != nil {
return err
}
}
format := options.format
if len(format) == 0 {
format = formatter.TableFormatKey
if len(dockerCli.ConfigFile().NodesFormat) > 0 && !options.quiet {
format = dockerCli.ConfigFile().NodesFormat
}
}
nodesCtx := formatter.Context{
Output: dockerCli.Out(),
Format: NewFormat(format, options.quiet),
}
sort.Slice(nodes, func(i, j int) bool {
return sortorder.NaturalLess(nodes[i].Description.Hostname, nodes[j].Description.Hostname)
})
return FormatWrite(nodesCtx, nodes, info)
}