DockerCLI/cli/command/volume/prune.go

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package volume
import (
"fmt"
"github.com/docker/cli/cli"
"github.com/docker/cli/cli/command"
"github.com/docker/cli/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 volumes
func NewPruneCommand(dockerCli command.Cli) *cobra.Command {
options := pruneOptions{filter: opts.NewFilterOpt()}
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, options)
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
},
Annotations: map[string]string{"version": "1.25"},
}
flags := cmd.Flags()
flags.BoolVarP(&options.force, "force", "f", false, "Do not prompt for confirmation")
flags.Var(&options.filter, "filter", "Provide filter values (e.g. 'label=<label>')")
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.Cli, options pruneOptions) (spaceReclaimed uint64, output string, err error) {
pruneFilters := command.PruneFilters(dockerCli, options.filter.Value())
if !options.force && !command.PromptForConfirmation(dockerCli.In(), dockerCli.Out(), warning) {
return 0, "", nil
}
report, err := dockerCli.Client().VolumesPrune(context.Background(), pruneFilters)
if err != nil {
return 0, "", err
}
if len(report.VolumesDeleted) > 0 {
output = "Deleted Volumes:\n"
for _, id := range report.VolumesDeleted {
output += id + "\n"
}
spaceReclaimed = report.SpaceReclaimed
}
return spaceReclaimed, output, nil
}
// RunPrune calls the Volume Prune API
// This returns the amount of space reclaimed and a detailed output string
func RunPrune(dockerCli command.Cli, filter opts.FilterOpt) (uint64, string, error) {
return runPrune(dockerCli, pruneOptions{force: true, filter: filter})
}