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|
package volumes
import (
"context"
"fmt"
"io"
"os"
"strings"
"text/tabwriter"
"text/template"
"github.com/containers/podman/v2/cmd/podman/registry"
"github.com/containers/podman/v2/cmd/podman/validate"
"github.com/containers/podman/v2/pkg/domain/entities"
"github.com/pkg/errors"
"github.com/spf13/cobra"
)
var (
volumeLsDescription = `
podman volume ls
List all available volumes. The output of the volumes can be filtered
and the output format can be changed to JSON or a user specified Go template.`
lsCommand = &cobra.Command{
Use: "ls",
Aliases: []string{"list"},
Args: validate.NoArgs,
Short: "List volumes",
Long: volumeLsDescription,
RunE: list,
}
)
var (
// Temporary struct to hold cli values.
cliOpts = struct {
Filter []string
Format string
Quiet bool
}{}
lsOpts = entities.VolumeListOptions{}
)
func init() {
registry.Commands = append(registry.Commands, registry.CliCommand{
Mode: []entities.EngineMode{entities.ABIMode, entities.TunnelMode},
Command: lsCommand,
Parent: volumeCmd,
})
flags := lsCommand.Flags()
flags.StringSliceVarP(&cliOpts.Filter, "filter", "f", []string{}, "Filter volume output")
flags.StringVar(&cliOpts.Format, "format", "{{.Driver}}\t{{.Name}}\n", "Format volume output using Go template")
flags.BoolVarP(&cliOpts.Quiet, "quiet", "q", false, "Print volume output in quiet mode")
}
func list(cmd *cobra.Command, args []string) error {
var w io.Writer = os.Stdout
if cliOpts.Quiet && cmd.Flag("format").Changed {
return errors.New("quiet and format flags cannot be used together")
}
if len(cliOpts.Filter) > 0 {
lsOpts.Filter = make(map[string][]string)
}
for _, f := range cliOpts.Filter {
filterSplit := strings.Split(f, "=")
if len(filterSplit) < 2 {
return errors.Errorf("filter input must be in the form of filter=value: %s is invalid", f)
}
lsOpts.Filter[filterSplit[0]] = append(lsOpts.Filter[filterSplit[0]], filterSplit[1:]...)
}
responses, err := registry.ContainerEngine().VolumeList(context.Background(), lsOpts)
if err != nil {
return err
}
if cliOpts.Format == "json" {
return outputJSON(responses)
}
if len(responses) < 1 {
return nil
}
// "\t" from the command line is not being recognized as a tab
// replacing the string "\t" to a tab character if the user passes in "\t"
cliOpts.Format = strings.Replace(cliOpts.Format, `\t`, "\t", -1)
if cliOpts.Quiet {
cliOpts.Format = "{{.Name}}\n"
}
headers := "DRIVER\tVOLUME NAME\n"
row := cliOpts.Format
if !strings.HasSuffix(cliOpts.Format, "\n") {
row += "\n"
}
format := "{{range . }}" + row + "{{end}}"
if !cliOpts.Quiet && !cmd.Flag("format").Changed {
w = tabwriter.NewWriter(os.Stdout, 12, 2, 2, ' ', 0)
format = headers + format
}
tmpl, err := template.New("listVolume").Parse(format)
if err != nil {
return err
}
if err := tmpl.Execute(w, responses); err != nil {
return err
}
if flusher, ok := w.(interface{ Flush() error }); ok {
return flusher.Flush()
}
return nil
}
func outputJSON(vols []*entities.VolumeListReport) error {
b, err := json.MarshalIndent(vols, "", " ")
if err != nil {
return err
}
fmt.Println(string(b))
return nil
}
|
