mirror of https://github.com/docker/cli.git
121 lines
3.3 KiB
Go
121 lines
3.3 KiB
Go
package context
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import (
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"fmt"
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"os"
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"sort"
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"github.com/docker/cli/cli"
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"github.com/docker/cli/cli/command"
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"github.com/docker/cli/cli/command/completion"
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"github.com/docker/cli/cli/command/formatter"
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"github.com/docker/cli/cli/context/docker"
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flagsHelper "github.com/docker/cli/cli/flags"
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"github.com/docker/docker/client"
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"github.com/fvbommel/sortorder"
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"github.com/spf13/cobra"
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)
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type listOptions struct {
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format string
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quiet bool
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}
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func newListCommand(dockerCli command.Cli) *cobra.Command {
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opts := &listOptions{}
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cmd := &cobra.Command{
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Use: "ls [OPTIONS]",
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Aliases: []string{"list"},
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Short: "List contexts",
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Args: cli.NoArgs,
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RunE: func(cmd *cobra.Command, args []string) error {
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return runList(dockerCli, opts)
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},
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ValidArgsFunction: completion.NoComplete,
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}
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flags := cmd.Flags()
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flags.StringVar(&opts.format, "format", "", flagsHelper.FormatHelp)
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flags.BoolVarP(&opts.quiet, "quiet", "q", false, "Only show context names")
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return cmd
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}
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func runList(dockerCli command.Cli, opts *listOptions) error {
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if opts.format == "" {
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opts.format = formatter.TableFormatKey
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}
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contextMap, err := dockerCli.ContextStore().List()
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if err != nil {
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return err
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}
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var (
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curContext = dockerCli.CurrentContext()
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curFound bool
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contexts []*formatter.ClientContext
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)
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for _, rawMeta := range contextMap {
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isCurrent := rawMeta.Name == curContext
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if isCurrent {
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curFound = true
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}
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meta, err := command.GetDockerContext(rawMeta)
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if err != nil {
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// Add a stub-entry to the list, including the error-message
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// indicating that the context couldn't be loaded.
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contexts = append(contexts, &formatter.ClientContext{
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Name: rawMeta.Name,
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Current: isCurrent,
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Error: err.Error(),
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})
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continue
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}
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var errMsg string
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dockerEndpoint, err := docker.EndpointFromContext(rawMeta)
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if err != nil {
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errMsg = err.Error()
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}
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desc := formatter.ClientContext{
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Name: rawMeta.Name,
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Current: isCurrent,
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Description: meta.Description,
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DockerEndpoint: dockerEndpoint.Host,
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Error: errMsg,
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}
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contexts = append(contexts, &desc)
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}
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if !curFound {
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// The currently specified context wasn't found. We add a stub-entry
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// to the list, including the error-message indicating that the context
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// wasn't found.
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var errMsg string
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_, err := dockerCli.ContextStore().GetMetadata(curContext)
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if err != nil {
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errMsg = err.Error()
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}
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contexts = append(contexts, &formatter.ClientContext{
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Name: curContext,
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Current: true,
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Error: errMsg,
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})
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}
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sort.Slice(contexts, func(i, j int) bool {
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return sortorder.NaturalLess(contexts[i].Name, contexts[j].Name)
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})
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if err := format(dockerCli, opts, contexts); err != nil {
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return err
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}
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if os.Getenv(client.EnvOverrideHost) != "" {
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_, _ = fmt.Fprintf(dockerCli.Err(), "Warning: %[1]s environment variable overrides the active context. "+
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"To use a context, either set the global --context flag, or unset %[1]s environment variable.\n", client.EnvOverrideHost)
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}
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return nil
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}
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func format(dockerCli command.Cli, opts *listOptions, contexts []*formatter.ClientContext) error {
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contextCtx := formatter.Context{
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Output: dockerCli.Out(),
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Format: formatter.NewClientContextFormat(opts.format, opts.quiet),
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}
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return formatter.ClientContextWrite(contextCtx, contexts)
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}
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