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package system
import (
"runtime"
"time"
"golang.org/x/net/context"
"github.com/docker/cli/cli"
"github.com/docker/cli/cli/command"
"github.com/docker/docker/api/types"
"github.com/docker/docker/pkg/templates"
"github.com/spf13/cobra"
)
var versionTemplate = `Client:
Version: {{.Client.Version}}
API version: {{.Client.APIVersion}}{{if ne .Client.APIVersion .Client.DefaultAPIVersion}} (downgraded from {{.Client.DefaultAPIVersion}}){{end}}
Go version: {{.Client.GoVersion}}
Git commit: {{.Client.GitCommit}}
Built: {{.Client.BuildTime}}
OS/Arch: {{.Client.Os}}/{{.Client.Arch}}{{if .ServerOK}}
Server:
Version: {{.Server.Version}}
API version: {{.Server.APIVersion}} (minimum version {{.Server.MinAPIVersion}})
Go version: {{.Server.GoVersion}}
Git commit: {{.Server.GitCommit}}
Built: {{.Server.BuildTime}}
OS/Arch: {{.Server.Os}}/{{.Server.Arch}}
Experimental: {{.Server.Experimental}}{{end}}`
type versionOptions struct {
format string
}
// versionInfo contains version information of both the Client, and Server
type versionInfo struct {
Client clientVersion
Server *types.Version
}
type clientVersion struct {
Version string
APIVersion string `json:"ApiVersion"`
DefaultAPIVersion string `json:"DefaultAPIVersion,omitempty"`
GitCommit string
GoVersion string
Os string
Arch string
BuildTime string `json:",omitempty"`
}
// ServerOK returns true when the client could connect to the docker server
// and parse the information received. It returns false otherwise.
func (v versionInfo) ServerOK() bool {
return v.Server != nil
}
// NewVersionCommand creates a new cobra.Command for `docker version`
func NewVersionCommand(dockerCli *command.DockerCli) *cobra.Command {
var opts versionOptions
cmd := &cobra.Command{
Use: "version [OPTIONS]",
Short: "Show the Docker version information",
Args: cli.NoArgs,
RunE: func(cmd *cobra.Command, args []string) error {
return runVersion(dockerCli, &opts)
},
}
flags := cmd.Flags()
flags.StringVarP(&opts.format, "format", "f", "", "Format the output using the given Go template")
return cmd
}
func runVersion(dockerCli *command.DockerCli, opts *versionOptions) error {
ctx := context.Background()
templateFormat := versionTemplate
if opts.format != "" {
templateFormat = opts.format
}
tmpl, err := templates.Parse(templateFormat)
if err != nil {
return cli.StatusError{StatusCode: 64,
Status: "Template parsing error: " + err.Error()}
}
vd := versionInfo{
Client: clientVersion{
Version: cli.Version,
APIVersion: dockerCli.Client().ClientVersion(),
DefaultAPIVersion: dockerCli.DefaultVersion(),
GoVersion: runtime.Version(),
GitCommit: cli.GitCommit,
BuildTime: cli.BuildTime,
Os: runtime.GOOS,
Arch: runtime.GOARCH,
},
}
serverVersion, err := dockerCli.Client().ServerVersion(ctx)
if err == nil {
vd.Server = &serverVersion
}
// first we need to make BuildTime more human friendly
t, errTime := time.Parse(time.RFC3339Nano, vd.Client.BuildTime)
if errTime == nil {
vd.Client.BuildTime = t.Format(time.ANSIC)
}
if vd.ServerOK() {
t, errTime = time.Parse(time.RFC3339Nano, vd.Server.BuildTime)
if errTime == nil {
vd.Server.BuildTime = t.Format(time.ANSIC)
}
}
if err2 := tmpl.Execute(dockerCli.Out(), vd); err2 != nil && err == nil {
err = err2
}
dockerCli.Out().Write([]byte{'\n'})
return err
}