package container import ( "fmt" "github.com/docker/docker/cli" "github.com/docker/docker/cli/command" "github.com/docker/docker/opts" units "github.com/docker/go-units" "github.com/spf13/cobra" "golang.org/x/net/context" ) type pruneOptions struct { force bool filter opts.FilterOpt } // NewPruneCommand returns a new cobra prune command for containers func NewPruneCommand(dockerCli *command.DockerCli) *cobra.Command { opts := pruneOptions{filter: opts.NewFilterOpt()} cmd := &cobra.Command{ Use: "prune [OPTIONS]", Short: "Remove all stopped containers", Args: cli.NoArgs, RunE: func(cmd *cobra.Command, args []string) error { spaceReclaimed, output, err := runPrune(dockerCli, opts) if err != nil { return err } if output != "" { fmt.Fprintln(dockerCli.Out(), output) } fmt.Fprintln(dockerCli.Out(), "Total reclaimed space:", units.HumanSize(float64(spaceReclaimed))) return nil }, Tags: map[string]string{"version": "1.25"}, } flags := cmd.Flags() flags.BoolVarP(&opts.force, "force", "f", false, "Do not prompt for confirmation") flags.Var(&opts.filter, "filter", "Provide filter values (e.g. 'until=')") return cmd } const warning = `WARNING! This will remove all stopped containers. Are you sure you want to continue?` func runPrune(dockerCli *command.DockerCli, opts pruneOptions) (spaceReclaimed uint64, output string, err error) { pruneFilters := opts.filter.Value() if !opts.force && !command.PromptForConfirmation(dockerCli.In(), dockerCli.Out(), warning) { return } report, err := dockerCli.Client().ContainersPrune(context.Background(), pruneFilters) if err != nil { return } if len(report.ContainersDeleted) > 0 { output = "Deleted Containers:\n" for _, id := range report.ContainersDeleted { output += id + "\n" } spaceReclaimed = report.SpaceReclaimed } return } // RunPrune calls the Container Prune API // This returns the amount of space reclaimed and a detailed output string func RunPrune(dockerCli *command.DockerCli, filter opts.FilterOpt) (uint64, string, error) { return runPrune(dockerCli, pruneOptions{force: true, filter: filter}) }