package volume import ( "fmt" "golang.org/x/net/context" "github.com/docker/docker/api/types" "github.com/docker/docker/cli" "github.com/docker/docker/cli/command" units "github.com/docker/go-units" "github.com/spf13/cobra" ) type pruneOptions struct { force bool } // NewPruneCommand returns a new cobra prune command for volumes func NewPruneCommand(dockerCli *command.DockerCli) *cobra.Command { var opts pruneOptions cmd := &cobra.Command{ Use: "prune [OPTIONS]", Short: "Remove all unused volumes", 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 }, } flags := cmd.Flags() flags.BoolVarP(&opts.force, "force", "f", false, "Do not prompt for confirmation") return cmd } const warning = `WARNING! This will remove all volumes not used by at least one container. Are you sure you want to continue?` func runPrune(dockerCli *command.DockerCli, opts pruneOptions) (spaceReclaimed uint64, output string, err error) { if !opts.force && !command.PromptForConfirmation(dockerCli.In(), dockerCli.Out(), warning) { return } report, err := dockerCli.Client().VolumesPrune(context.Background(), types.VolumesPruneConfig{}) if err != nil { return } if len(report.VolumesDeleted) > 0 { output = "Deleted Volumes:\n" for _, id := range report.VolumesDeleted { output += id + "\n" } spaceReclaimed = report.SpaceReclaimed } return } // RunPrune calls the Volume Prune API // This returns the amount of space reclaimed and a detailed output string func RunPrune(dockerCli *command.DockerCli) (uint64, string, error) { return runPrune(dockerCli, pruneOptions{force: true}) }