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list.go
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list.go
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// SPDX-License-Identifier: BSD-3-Clause
// Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors.
// Licensed under the BSD-3-Clause License (the "License").
// You may not use this file expect in compliance with the License.
package list
import (
"context"
"fmt"
"net"
"github.com/spf13/cobra"
networkapi "kraftkit.sh/api/network/v1alpha1"
"kraftkit.sh/cmdfactory"
"kraftkit.sh/internal/tableprinter"
"kraftkit.sh/iostreams"
"kraftkit.sh/log"
"kraftkit.sh/machine/network"
)
type ListOptions struct {
Long bool `long:"long" short:"l" usage:"Show more information"`
Output string `long:"output" short:"o" usage:"Set output format" default:"table"`
driver string
}
func NewCmd() *cobra.Command {
cmd, err := cmdfactory.New(&ListOptions{}, cobra.Command{
Short: "List machine networks",
Use: "ls [FLAGS]",
Aliases: []string{"list"},
Args: cobra.NoArgs,
Annotations: map[string]string{
cmdfactory.AnnotationHelpGroup: "net",
},
})
if err != nil {
panic(err)
}
return cmd
}
func (opts *ListOptions) Pre(cmd *cobra.Command, _ []string) error {
opts.driver = cmd.Flag("driver").Value.String()
return nil
}
func (opts *ListOptions) Run(ctx context.Context, _ []string) error {
var err error
strategy, ok := network.Strategies()[opts.driver]
if !ok {
return fmt.Errorf("unsupported network driver strategy: %s", opts.driver)
}
controller, err := strategy.NewNetworkV1alpha1(ctx)
if err != nil {
return err
}
networks, err := controller.List(ctx, &networkapi.NetworkList{})
if err != nil {
return err
}
type netTable struct {
id string
name string
network string
driver string
status networkapi.NetworkState
}
var items []netTable
for _, network := range networks.Items {
addr := &net.IPNet{
IP: net.ParseIP(network.Spec.Gateway),
Mask: net.IPMask(net.ParseIP(network.Spec.Netmask)),
}
items = append(items, netTable{
id: string(network.UID),
name: network.Name,
network: addr.String(),
driver: opts.driver,
status: network.Status.State,
})
}
err = iostreams.G(ctx).StartPager()
if err != nil {
log.G(ctx).Errorf("error starting pager: %v", err)
}
defer iostreams.G(ctx).StopPager()
cs := iostreams.G(ctx).ColorScheme()
table, err := tableprinter.NewTablePrinter(ctx,
tableprinter.WithMaxWidth(iostreams.G(ctx).TerminalWidth()),
tableprinter.WithOutputFormatFromString(opts.Output),
)
if err != nil {
return err
}
// Header row
if opts.Long {
table.AddField("MACHINE ID", cs.Bold)
}
table.AddField("NAME", cs.Bold)
table.AddField("NETWORK", cs.Bold)
table.AddField("DRIVER", cs.Bold)
table.AddField("STATUS", cs.Bold)
table.EndRow()
for _, item := range items {
if opts.Long {
table.AddField(item.id, nil)
}
table.AddField(item.name, nil)
table.AddField(item.network, nil)
table.AddField(item.driver, nil)
table.AddField(item.status.String(), nil)
table.EndRow()
}
return table.Render(iostreams.G(ctx).Out)
}