120 lines
3.1 KiB
Go
120 lines
3.1 KiB
Go
package volumes
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import (
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"context"
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"fmt"
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"html/template"
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"io"
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"os"
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"strings"
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"text/tabwriter"
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"github.com/containers/libpod/cmd/podman/registry"
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"github.com/containers/libpod/cmd/podman/validate"
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"github.com/containers/libpod/pkg/domain/entities"
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"github.com/pkg/errors"
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"github.com/spf13/cobra"
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)
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var (
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volumeLsDescription = `
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podman volume ls
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List all available volumes. The output of the volumes can be filtered
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and the output format can be changed to JSON or a user specified Go template.`
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lsCommand = &cobra.Command{
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Use: "ls",
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Aliases: []string{"list"},
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Args: validate.NoArgs,
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Short: "List volumes",
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Long: volumeLsDescription,
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RunE: list,
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}
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)
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var (
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// Temporary struct to hold cli values.
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cliOpts = struct {
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Filter []string
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Format string
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Quiet bool
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}{}
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lsOpts = entities.VolumeListOptions{}
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)
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func init() {
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registry.Commands = append(registry.Commands, registry.CliCommand{
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Mode: []entities.EngineMode{entities.ABIMode, entities.TunnelMode},
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Command: lsCommand,
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Parent: volumeCmd,
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})
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flags := lsCommand.Flags()
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flags.StringSliceVarP(&cliOpts.Filter, "filter", "f", []string{}, "Filter volume output")
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flags.StringVar(&cliOpts.Format, "format", "{{.Driver}}\t{{.Name}}\n", "Format volume output using Go template")
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flags.BoolVarP(&cliOpts.Quiet, "quiet", "q", false, "Print volume output in quiet mode")
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}
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func list(cmd *cobra.Command, args []string) error {
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var w io.Writer = os.Stdout
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if cliOpts.Quiet && cmd.Flag("format").Changed {
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return errors.New("quiet and format flags cannot be used together")
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}
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if len(cliOpts.Filter) > 0 {
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lsOpts.Filter = make(map[string][]string)
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}
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for _, f := range cliOpts.Filter {
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filterSplit := strings.Split(f, "=")
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if len(filterSplit) < 2 {
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return errors.Errorf("filter input must be in the form of filter=value: %s is invalid", f)
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}
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lsOpts.Filter[filterSplit[0]] = append(lsOpts.Filter[filterSplit[0]], filterSplit[1:]...)
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}
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responses, err := registry.ContainerEngine().VolumeList(context.Background(), lsOpts)
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if err != nil {
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return err
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}
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if cliOpts.Format == "json" {
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return outputJSON(responses)
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}
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if len(responses) < 1 {
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return nil
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}
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// "\t" from the command line is not being recognized as a tab
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// replacing the string "\t" to a tab character if the user passes in "\t"
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cliOpts.Format = strings.Replace(cliOpts.Format, `\t`, "\t", -1)
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if cliOpts.Quiet {
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cliOpts.Format = "{{.Name}}\n"
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}
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headers := "DRIVER\tVOLUME NAME\n"
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row := cliOpts.Format
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if !strings.HasSuffix(cliOpts.Format, "\n") {
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row += "\n"
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}
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format := "{{range . }}" + row + "{{end}}"
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if !cliOpts.Quiet && !cmd.Flag("format").Changed {
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w = tabwriter.NewWriter(os.Stdout, 12, 2, 2, ' ', 0)
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format = headers + format
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}
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tmpl, err := template.New("listVolume").Parse(format)
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if err != nil {
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return err
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}
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if err := tmpl.Execute(w, responses); err != nil {
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return err
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}
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if flusher, ok := w.(interface{ Flush() error }); ok {
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return flusher.Flush()
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}
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return nil
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}
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func outputJSON(vols []*entities.VolumeListReport) error {
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b, err := json.MarshalIndent(vols, "", " ")
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if err != nil {
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return err
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}
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fmt.Println(string(b))
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return nil
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}
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