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95 lines
2.7 KiB
Go
95 lines
2.7 KiB
Go
package image
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import (
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"fmt"
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"golang.org/x/net/context"
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"github.com/docker/docker/cli"
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"github.com/docker/docker/cli/command"
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"github.com/docker/docker/opts"
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units "github.com/docker/go-units"
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"github.com/spf13/cobra"
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)
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type pruneOptions struct {
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force bool
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all bool
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filter opts.FilterOpt
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}
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// NewPruneCommand returns a new cobra prune command for images
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func NewPruneCommand(dockerCli command.Cli) *cobra.Command {
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opts := pruneOptions{filter: opts.NewFilterOpt()}
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cmd := &cobra.Command{
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Use: "prune [OPTIONS]",
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Short: "Remove unused images",
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Args: cli.NoArgs,
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RunE: func(cmd *cobra.Command, args []string) error {
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spaceReclaimed, output, err := runPrune(dockerCli, opts)
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if err != nil {
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return err
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}
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if output != "" {
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fmt.Fprintln(dockerCli.Out(), output)
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}
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fmt.Fprintln(dockerCli.Out(), "Total reclaimed space:", units.HumanSize(float64(spaceReclaimed)))
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return nil
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},
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Tags: map[string]string{"version": "1.25"},
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}
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flags := cmd.Flags()
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flags.BoolVarP(&opts.force, "force", "f", false, "Do not prompt for confirmation")
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flags.BoolVarP(&opts.all, "all", "a", false, "Remove all unused images, not just dangling ones")
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flags.Var(&opts.filter, "filter", "Provide filter values (e.g. 'until=<timestamp>')")
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return cmd
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}
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const (
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allImageWarning = `WARNING! This will remove all images without at least one container associated to them.
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Are you sure you want to continue?`
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danglingWarning = `WARNING! This will remove all dangling images.
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Are you sure you want to continue?`
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)
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func runPrune(dockerCli command.Cli, opts pruneOptions) (spaceReclaimed uint64, output string, err error) {
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pruneFilters := opts.filter.Value()
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pruneFilters.Add("dangling", fmt.Sprintf("%v", !opts.all))
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pruneFilters = command.PruneFilters(dockerCli, pruneFilters)
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warning := danglingWarning
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if opts.all {
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warning = allImageWarning
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}
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if !opts.force && !command.PromptForConfirmation(dockerCli.In(), dockerCli.Out(), warning) {
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return
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}
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report, err := dockerCli.Client().ImagesPrune(context.Background(), pruneFilters)
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if err != nil {
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return
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}
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if len(report.ImagesDeleted) > 0 {
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output = "Deleted Images:\n"
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for _, st := range report.ImagesDeleted {
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if st.Untagged != "" {
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output += fmt.Sprintln("untagged:", st.Untagged)
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} else {
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output += fmt.Sprintln("deleted:", st.Deleted)
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}
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}
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spaceReclaimed = report.SpaceReclaimed
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}
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return
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}
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// RunPrune calls the Image Prune API
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// This returns the amount of space reclaimed and a detailed output string
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func RunPrune(dockerCli command.Cli, all bool, filter opts.FilterOpt) (uint64, string, error) {
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return runPrune(dockerCli, pruneOptions{force: true, all: all, filter: filter})
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}
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