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|
package network
import (
"encoding/json"
"fmt"
"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/containers/podman/v2/pkg/network"
"github.com/spf13/cobra"
"github.com/spf13/pflag"
)
var (
networklistDescription = `List networks`
networklistCommand = &cobra.Command{
Use: "ls",
Args: validate.NoArgs,
Short: "network list",
Long: networklistDescription,
RunE: networkList,
Example: `podman network list`,
Annotations: map[string]string{
registry.ParentNSRequired: "",
},
}
)
var (
networkListOptions entities.NetworkListOptions
headers = "NAME\tVERSION\tPLUGINS\n"
defaultListRow = "{{.Name}}\t{{.Version}}\t{{.Plugins}}\n"
)
func networkListFlags(flags *pflag.FlagSet) {
// TODO enable filters based on something
//flags.StringSliceVarP(&networklistCommand.Filter, "filter", "f", []string{}, "Pause all running containers")
flags.StringVarP(&networkListOptions.Format, "format", "f", "", "Pretty-print networks to JSON or using a Go template")
flags.BoolVarP(&networkListOptions.Quiet, "quiet", "q", false, "display only names")
flags.StringVarP(&networkListOptions.Filter, "filter", "", "", "Provide filter values (e.g. 'name=podman')")
}
func init() {
registry.Commands = append(registry.Commands, registry.CliCommand{
Mode: []entities.EngineMode{entities.ABIMode, entities.TunnelMode},
Command: networklistCommand,
Parent: networkCmd,
})
flags := networklistCommand.Flags()
networkListFlags(flags)
}
func networkList(cmd *cobra.Command, args []string) error {
// validate the filter pattern.
if len(networkListOptions.Filter) > 0 {
tokens := strings.Split(networkListOptions.Filter, "=")
if len(tokens) != 2 {
return fmt.Errorf("invalid filter syntax : %s", networkListOptions.Filter)
}
}
responses, err := registry.ContainerEngine().NetworkList(registry.Context(), networkListOptions)
if err != nil {
return err
}
// quiet means we only print the network names
if networkListOptions.Quiet {
return quietOut(responses)
}
if strings.ToLower(networkListOptions.Format) == "json" {
return jsonOut(responses)
}
nlprs := make([]ListPrintReports, 0, len(responses))
for _, r := range responses {
nlprs = append(nlprs, ListPrintReports{r})
}
row := networkListOptions.Format
if len(row) < 1 {
row = defaultListRow
}
if !strings.HasSuffix(row, "\n") {
row += "\n"
}
format := "{{range . }}" + row + "{{end}}"
if !cmd.Flag("format").Changed {
format = headers + format
}
tmpl, err := template.New("listNetworks").Parse(format)
if err != nil {
return err
}
w := tabwriter.NewWriter(os.Stdout, 8, 2, 2, ' ', 0)
if err := tmpl.Execute(w, nlprs); err != nil {
return err
}
return w.Flush()
}
func quietOut(responses []*entities.NetworkListReport) error {
for _, r := range responses {
fmt.Println(r.Name)
}
return nil
}
func jsonOut(responses []*entities.NetworkListReport) error {
b, err := json.MarshalIndent(responses, "", " ")
if err != nil {
return err
}
fmt.Println(string(b))
return nil
}
type ListPrintReports struct {
*entities.NetworkListReport
}
func (n ListPrintReports) Version() string {
return n.CNIVersion
}
func (n ListPrintReports) Plugins() string {
return network.GetCNIPlugins(n.NetworkConfigList)
}
|
