DockerCLI/command/network/prune.go

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package network
import (
"fmt"
"golang.org/x/net/context"
"github.com/docker/docker/api/types/filters"
"github.com/docker/docker/cli"
"github.com/docker/docker/cli/command"
"github.com/spf13/cobra"
)
type pruneOptions struct {
force bool
}
// NewPruneCommand returns a new cobra prune command for networks
func NewPruneCommand(dockerCli *command.DockerCli) *cobra.Command {
var opts pruneOptions
cmd := &cobra.Command{
Use: "prune [OPTIONS]",
Short: "Remove all unused networks",
Args: cli.NoArgs,
RunE: func(cmd *cobra.Command, args []string) error {
output, err := runPrune(dockerCli, opts)
if err != nil {
return err
}
if output != "" {
fmt.Fprintln(dockerCli.Out(), output)
}
return nil
},
Tags: map[string]string{"version": "1.25"},
}
flags := cmd.Flags()
flags.BoolVarP(&opts.force, "force", "f", false, "Do not prompt for confirmation")
return cmd
}
const warning = `WARNING! This will remove all networks not used by at least one container.
Are you sure you want to continue?`
func runPrune(dockerCli *command.DockerCli, opts pruneOptions) (output string, err error) {
if !opts.force && !command.PromptForConfirmation(dockerCli.In(), dockerCli.Out(), warning) {
return
}
report, err := dockerCli.Client().NetworksPrune(context.Background(), filters.Args{})
if err != nil {
return
}
if len(report.NetworksDeleted) > 0 {
output = "Deleted Networks:\n"
for _, id := range report.NetworksDeleted {
output += id + "\n"
}
}
return
}
// RunPrune calls the Network Prune API
// This returns the amount of space reclaimed and a detailed output string
func RunPrune(dockerCli *command.DockerCli) (uint64, string, error) {
output, err := runPrune(dockerCli, pruneOptions{force: true})
return 0, output, err
}