DockerCLI/cli/command/context/list.go

93 lines
2.6 KiB
Go

package context
import (
"fmt"
"os"
"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"
"github.com/docker/cli/cli/context/docker"
flagsHelper "github.com/docker/cli/cli/flags"
"github.com/docker/docker/client"
"github.com/fvbommel/sortorder"
"github.com/spf13/cobra"
)
type listOptions struct {
format string
quiet bool
}
func newListCommand(dockerCli command.Cli) *cobra.Command {
opts := &listOptions{}
cmd := &cobra.Command{
Use: "ls [OPTIONS]",
Aliases: []string{"list"},
Short: "List contexts",
Args: cli.NoArgs,
RunE: func(cmd *cobra.Command, args []string) error {
return runList(dockerCli, opts)
},
ValidArgsFunction: completion.NoComplete,
}
flags := cmd.Flags()
flags.StringVar(&opts.format, "format", "", flagsHelper.FormatHelp)
flags.BoolVarP(&opts.quiet, "quiet", "q", false, "Only show context names")
return cmd
}
func runList(dockerCli command.Cli, opts *listOptions) error {
if opts.format == "" {
opts.format = formatter.TableFormatKey
}
curContext := dockerCli.CurrentContext()
contextMap, err := dockerCli.ContextStore().List()
if err != nil {
return err
}
var contexts []*formatter.ClientContext
for _, rawMeta := range contextMap {
meta, err := command.GetDockerContext(rawMeta)
if err != nil {
return err
}
dockerEndpoint, err := docker.EndpointFromContext(rawMeta)
if err != nil {
return err
}
if rawMeta.Name == command.DefaultContextName {
meta.Description = "Current DOCKER_HOST based configuration"
}
desc := formatter.ClientContext{
Name: rawMeta.Name,
Current: rawMeta.Name == curContext,
Description: meta.Description,
DockerEndpoint: dockerEndpoint.Host,
}
contexts = append(contexts, &desc)
}
sort.Slice(contexts, func(i, j int) bool {
return sortorder.NaturalLess(contexts[i].Name, contexts[j].Name)
})
if err := format(dockerCli, opts, contexts); err != nil {
return err
}
if os.Getenv(client.EnvOverrideHost) != "" {
fmt.Fprintf(dockerCli.Err(), "Warning: %[1]s environment variable overrides the active context. "+
"To use a context, either set the global --context flag, or unset %[1]s environment variable.\n", client.EnvOverrideHost)
}
return nil
}
func format(dockerCli command.Cli, opts *listOptions, contexts []*formatter.ClientContext) error {
contextCtx := formatter.Context{
Output: dockerCli.Out(),
Format: formatter.NewClientContextFormat(opts.format, opts.quiet),
}
return formatter.ClientContextWrite(contextCtx, contexts)
}