github.com/DaoCloud/dao@v0.0.0-20161212064103-c3dbfd13ee36/api/client/network/list.go (about)

     1  package network
     2  
     3  import (
     4  	"fmt"
     5  	"sort"
     6  	"text/tabwriter"
     7  
     8  	"golang.org/x/net/context"
     9  
    10  	"github.com/docker/docker/api/client"
    11  	"github.com/docker/docker/cli"
    12  	"github.com/docker/docker/pkg/stringid"
    13  	"github.com/docker/engine-api/types"
    14  	"github.com/docker/engine-api/types/filters"
    15  	"github.com/spf13/cobra"
    16  )
    17  
    18  type byNetworkName []types.NetworkResource
    19  
    20  func (r byNetworkName) Len() int           { return len(r) }
    21  func (r byNetworkName) Swap(i, j int)      { r[i], r[j] = r[j], r[i] }
    22  func (r byNetworkName) Less(i, j int) bool { return r[i].Name < r[j].Name }
    23  
    24  type listOptions struct {
    25  	quiet   bool
    26  	noTrunc bool
    27  	filter  []string
    28  }
    29  
    30  func newListCommand(dockerCli *client.DockerCli) *cobra.Command {
    31  	var opts listOptions
    32  
    33  	cmd := &cobra.Command{
    34  		Use:     "ls [OPTIONS]",
    35  		Aliases: []string{"list"},
    36  		Short:   "罗列所有网络",
    37  		Args:    cli.NoArgs,
    38  		RunE: func(cmd *cobra.Command, args []string) error {
    39  			return runList(dockerCli, opts)
    40  		},
    41  	}
    42  
    43  	flags := cmd.Flags()
    44  
    45  	flags.BoolVarP(&opts.quiet, "quiet", "q", false, "仅显示网络ID")
    46  	flags.BoolVar(&opts.noTrunc, "no-trunc", false, "不截断命令输出内容")
    47  	flags.StringSliceVarP(&opts.filter, "filter", "f", []string{}, "提供一些过滤值(比如 'dangling=true')")
    48  
    49  	return cmd
    50  }
    51  
    52  func runList(dockerCli *client.DockerCli, opts listOptions) error {
    53  	client := dockerCli.Client()
    54  
    55  	netFilterArgs := filters.NewArgs()
    56  	for _, f := range opts.filter {
    57  		var err error
    58  		netFilterArgs, err = filters.ParseFlag(f, netFilterArgs)
    59  		if err != nil {
    60  			return err
    61  		}
    62  	}
    63  
    64  	options := types.NetworkListOptions{
    65  		Filters: netFilterArgs,
    66  	}
    67  
    68  	networkResources, err := client.NetworkList(context.Background(), options)
    69  	if err != nil {
    70  		return err
    71  	}
    72  
    73  	w := tabwriter.NewWriter(dockerCli.Out(), 20, 1, 3, ' ', 0)
    74  	if !opts.quiet {
    75  		fmt.Fprintf(w, "网络ID\t名称\t驱动\t范围")
    76  		fmt.Fprintf(w, "\n")
    77  	}
    78  
    79  	sort.Sort(byNetworkName(networkResources))
    80  	for _, networkResource := range networkResources {
    81  		ID := networkResource.ID
    82  		netName := networkResource.Name
    83  		driver := networkResource.Driver
    84  		scope := networkResource.Scope
    85  		if !opts.noTrunc {
    86  			ID = stringid.TruncateID(ID)
    87  		}
    88  		if opts.quiet {
    89  			fmt.Fprintln(w, ID)
    90  			continue
    91  		}
    92  		fmt.Fprintf(w, "%s\t%s\t%s\t%s\t",
    93  			ID,
    94  			netName,
    95  			driver,
    96  			scope)
    97  		fmt.Fprint(w, "\n")
    98  	}
    99  	w.Flush()
   100  	return nil
   101  }