github.com/endophage/docker@v1.4.2-0.20161027011718-242853499895/cli/command/system/version.go (about)

     1  package system
     2  
     3  import (
     4  	"runtime"
     5  	"time"
     6  
     7  	"golang.org/x/net/context"
     8  
     9  	"github.com/docker/docker/api/types"
    10  	"github.com/docker/docker/cli"
    11  	"github.com/docker/docker/cli/command"
    12  	"github.com/docker/docker/dockerversion"
    13  	"github.com/docker/docker/utils/templates"
    14  	"github.com/spf13/cobra"
    15  )
    16  
    17  var versionTemplate = `Client:
    18   Version:      {{.Client.Version}}
    19   API version:  {{.Client.APIVersion}}
    20   Go version:   {{.Client.GoVersion}}
    21   Git commit:   {{.Client.GitCommit}}
    22   Built:        {{.Client.BuildTime}}
    23   OS/Arch:      {{.Client.Os}}/{{.Client.Arch}}{{if .ServerOK}}
    24  
    25  Server:
    26   Version:      {{.Server.Version}}
    27   API version:  {{.Server.APIVersion}}
    28   Go version:   {{.Server.GoVersion}}
    29   Git commit:   {{.Server.GitCommit}}
    30   Built:        {{.Server.BuildTime}}
    31   OS/Arch:      {{.Server.Os}}/{{.Server.Arch}}
    32   Experimental: {{.Server.Experimental}}{{end}}`
    33  
    34  type versionOptions struct {
    35  	format string
    36  }
    37  
    38  // NewVersionCommand creates a new cobra.Command for `docker version`
    39  func NewVersionCommand(dockerCli *command.DockerCli) *cobra.Command {
    40  	var opts versionOptions
    41  
    42  	cmd := &cobra.Command{
    43  		Use:   "version [OPTIONS]",
    44  		Short: "Show the Docker version information",
    45  		Args:  cli.NoArgs,
    46  		RunE: func(cmd *cobra.Command, args []string) error {
    47  			return runVersion(dockerCli, &opts)
    48  		},
    49  	}
    50  
    51  	flags := cmd.Flags()
    52  
    53  	flags.StringVarP(&opts.format, "format", "f", "", "Format the output using the given Go template")
    54  
    55  	return cmd
    56  }
    57  
    58  func runVersion(dockerCli *command.DockerCli, opts *versionOptions) error {
    59  	ctx := context.Background()
    60  
    61  	templateFormat := versionTemplate
    62  	if opts.format != "" {
    63  		templateFormat = opts.format
    64  	}
    65  
    66  	tmpl, err := templates.Parse(templateFormat)
    67  	if err != nil {
    68  		return cli.StatusError{StatusCode: 64,
    69  			Status: "Template parsing error: " + err.Error()}
    70  	}
    71  
    72  	vd := types.VersionResponse{
    73  		Client: &types.Version{
    74  			Version:    dockerversion.Version,
    75  			APIVersion: dockerCli.Client().ClientVersion(),
    76  			GoVersion:  runtime.Version(),
    77  			GitCommit:  dockerversion.GitCommit,
    78  			BuildTime:  dockerversion.BuildTime,
    79  			Os:         runtime.GOOS,
    80  			Arch:       runtime.GOARCH,
    81  		},
    82  	}
    83  
    84  	serverVersion, err := dockerCli.Client().ServerVersion(ctx)
    85  	if err == nil {
    86  		vd.Server = &serverVersion
    87  	}
    88  
    89  	// first we need to make BuildTime more human friendly
    90  	t, errTime := time.Parse(time.RFC3339Nano, vd.Client.BuildTime)
    91  	if errTime == nil {
    92  		vd.Client.BuildTime = t.Format(time.ANSIC)
    93  	}
    94  
    95  	if vd.ServerOK() {
    96  		t, errTime = time.Parse(time.RFC3339Nano, vd.Server.BuildTime)
    97  		if errTime == nil {
    98  			vd.Server.BuildTime = t.Format(time.ANSIC)
    99  		}
   100  	}
   101  
   102  	if err2 := tmpl.Execute(dockerCli.Out(), vd); err2 != nil && err == nil {
   103  		err = err2
   104  	}
   105  	dockerCli.Out().Write([]byte{'\n'})
   106  	return err
   107  }