147 lines
3.9 KiB
Go
147 lines
3.9 KiB
Go
package network
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import (
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"encoding/json"
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"fmt"
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"os"
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"strings"
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"text/tabwriter"
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"text/template"
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"github.com/containers/common/pkg/completion"
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"github.com/containers/common/pkg/report"
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"github.com/containers/podman/v2/cmd/podman/common"
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"github.com/containers/podman/v2/cmd/podman/parse"
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"github.com/containers/podman/v2/cmd/podman/registry"
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"github.com/containers/podman/v2/cmd/podman/validate"
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"github.com/containers/podman/v2/libpod/network"
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"github.com/containers/podman/v2/pkg/domain/entities"
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"github.com/spf13/cobra"
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"github.com/spf13/pflag"
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)
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var (
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networklistDescription = `List networks`
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networklistCommand = &cobra.Command{
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Use: "ls [options]",
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Args: validate.NoArgs,
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Short: "network list",
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Long: networklistDescription,
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RunE: networkList,
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ValidArgsFunction: completion.AutocompleteNone,
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Example: `podman network list`,
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}
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)
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var (
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networkListOptions entities.NetworkListOptions
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)
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func networkListFlags(flags *pflag.FlagSet) {
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formatFlagName := "format"
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flags.StringVarP(&networkListOptions.Format, formatFlagName, "f", "", "Pretty-print networks to JSON or using a Go template")
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_ = networklistCommand.RegisterFlagCompletionFunc(formatFlagName, common.AutocompleteJSONFormat)
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flags.BoolVarP(&networkListOptions.Quiet, "quiet", "q", false, "display only names")
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filterFlagName := "filter"
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flags.StringVarP(&networkListOptions.Filter, filterFlagName, "", "", "Provide filter values (e.g. 'name=podman')")
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_ = networklistCommand.RegisterFlagCompletionFunc(filterFlagName, common.AutocompleteNetworkFilters)
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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: networklistCommand,
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Parent: networkCmd,
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})
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flags := networklistCommand.Flags()
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networkListFlags(flags)
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}
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func networkList(cmd *cobra.Command, args []string) error {
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// validate the filter pattern.
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if len(networkListOptions.Filter) > 0 {
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tokens := strings.Split(networkListOptions.Filter, "=")
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if len(tokens) != 2 {
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return fmt.Errorf("invalid filter syntax : %s", networkListOptions.Filter)
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}
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}
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responses, err := registry.ContainerEngine().NetworkList(registry.Context(), networkListOptions)
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if err != nil {
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return err
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}
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switch {
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case report.IsJSON(networkListOptions.Format):
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return jsonOut(responses)
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case networkListOptions.Quiet:
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// quiet means we only print the network names
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return quietOut(responses)
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}
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nlprs := make([]ListPrintReports, 0, len(responses))
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for _, r := range responses {
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nlprs = append(nlprs, ListPrintReports{r})
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}
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// Headers() gets lost resolving the embedded field names so add them
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headers := report.Headers(ListPrintReports{}, map[string]string{
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"Name": "name",
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"CNIVersion": "version",
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"Version": "version",
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"Plugins": "plugins",
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})
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renderHeaders := true
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row := "{{.Name}}\t{{.Version}}\t{{.Plugins}}\n"
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if cmd.Flags().Changed("format") {
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renderHeaders = parse.HasTable(networkListOptions.Format)
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row = report.NormalizeFormat(networkListOptions.Format)
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}
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format := parse.EnforceRange(row)
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tmpl, err := template.New("listNetworks").Parse(format)
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if err != nil {
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return err
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}
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w := tabwriter.NewWriter(os.Stdout, 8, 2, 2, ' ', 0)
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defer w.Flush()
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if renderHeaders {
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if err := tmpl.Execute(w, headers); err != nil {
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return err
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}
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}
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return tmpl.Execute(w, nlprs)
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}
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func quietOut(responses []*entities.NetworkListReport) error {
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for _, r := range responses {
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fmt.Println(r.Name)
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}
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return nil
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}
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func jsonOut(responses []*entities.NetworkListReport) error {
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b, err := json.MarshalIndent(responses, "", " ")
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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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type ListPrintReports struct {
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*entities.NetworkListReport
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}
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func (n ListPrintReports) Version() string {
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return n.CNIVersion
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}
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func (n ListPrintReports) Plugins() string {
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return network.GetCNIPlugins(n.NetworkConfigList)
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}
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