github.com/ph/moby@v1.13.1/cli/command/system/prune.go (about)

     1  package system
     2  
     3  import (
     4  	"fmt"
     5  
     6  	"github.com/docker/docker/cli"
     7  	"github.com/docker/docker/cli/command"
     8  	"github.com/docker/docker/cli/command/prune"
     9  	units "github.com/docker/go-units"
    10  	"github.com/spf13/cobra"
    11  )
    12  
    13  type pruneOptions struct {
    14  	force bool
    15  	all   bool
    16  }
    17  
    18  // NewPruneCommand creates a new cobra.Command for `docker prune`
    19  func NewPruneCommand(dockerCli *command.DockerCli) *cobra.Command {
    20  	var opts pruneOptions
    21  
    22  	cmd := &cobra.Command{
    23  		Use:   "prune [OPTIONS]",
    24  		Short: "Remove unused data",
    25  		Args:  cli.NoArgs,
    26  		RunE: func(cmd *cobra.Command, args []string) error {
    27  			return runPrune(dockerCli, opts)
    28  		},
    29  		Tags: map[string]string{"version": "1.25"},
    30  	}
    31  
    32  	flags := cmd.Flags()
    33  	flags.BoolVarP(&opts.force, "force", "f", false, "Do not prompt for confirmation")
    34  	flags.BoolVarP(&opts.all, "all", "a", false, "Remove all unused images not just dangling ones")
    35  
    36  	return cmd
    37  }
    38  
    39  const (
    40  	warning = `WARNING! This will remove:
    41  	- all stopped containers
    42  	- all volumes not used by at least one container
    43  	- all networks not used by at least one container
    44  	%s
    45  Are you sure you want to continue?`
    46  
    47  	danglingImageDesc = "- all dangling images"
    48  	allImageDesc      = `- all images without at least one container associated to them`
    49  )
    50  
    51  func runPrune(dockerCli *command.DockerCli, opts pruneOptions) error {
    52  	var message string
    53  
    54  	if opts.all {
    55  		message = fmt.Sprintf(warning, allImageDesc)
    56  	} else {
    57  		message = fmt.Sprintf(warning, danglingImageDesc)
    58  	}
    59  
    60  	if !opts.force && !command.PromptForConfirmation(dockerCli.In(), dockerCli.Out(), message) {
    61  		return nil
    62  	}
    63  
    64  	var spaceReclaimed uint64
    65  
    66  	for _, pruneFn := range []func(dockerCli *command.DockerCli) (uint64, string, error){
    67  		prune.RunContainerPrune,
    68  		prune.RunVolumePrune,
    69  		prune.RunNetworkPrune,
    70  	} {
    71  		spc, output, err := pruneFn(dockerCli)
    72  		if err != nil {
    73  			return err
    74  		}
    75  		spaceReclaimed += spc
    76  		if output != "" {
    77  			fmt.Fprintln(dockerCli.Out(), output)
    78  		}
    79  	}
    80  
    81  	spc, output, err := prune.RunImagePrune(dockerCli, opts.all)
    82  	if err != nil {
    83  		return err
    84  	}
    85  	if spc > 0 {
    86  		spaceReclaimed += spc
    87  		fmt.Fprintln(dockerCli.Out(), output)
    88  	}
    89  
    90  	fmt.Fprintln(dockerCli.Out(), "Total reclaimed space:", units.HumanSize(float64(spaceReclaimed)))
    91  
    92  	return nil
    93  }