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moby--moby/api/client/version.go

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package client
import (
"encoding/json"
"runtime"
"text/template"
"github.com/docker/docker/api"
"github.com/docker/docker/api/types"
"github.com/docker/docker/autogen/dockerversion"
flag "github.com/docker/docker/pkg/mflag"
"github.com/docker/docker/utils"
)
var VersionTemplate = `Client:
Version: {{.Client.Version}}
API version: {{.Client.ApiVersion}}
Go version: {{.Client.GoVersion}}
Git commit: {{.Client.GitCommit}}
Built: {{.Client.BuildTime}}
OS/Arch: {{.Client.Os}}/{{.Client.Arch}}{{if .Client.Experimental}}
Experimental: {{.Client.Experimental}}{{end}}{{if .ServerOK}}
Server:
Version: {{.Server.Version}}
API version: {{.Server.ApiVersion}}
Go version: {{.Server.GoVersion}}
Git commit: {{.Server.GitCommit}}
Built: {{.Server.BuildTime}}
OS/Arch: {{.Server.Os}}/{{.Server.Arch}}{{if .Server.Experimental}}
Experimental: {{.Server.Experimental}}{{end}}{{end}}`
type VersionData struct {
Client types.Version
ServerOK bool
Server types.Version
}
// CmdVersion shows Docker version information.
//
// Available version information is shown for: client Docker version, client API version, client Go version, client Git commit, client OS/Arch, server Docker version, server API version, server Go version, server Git commit, and server OS/Arch.
//
// Usage: docker version
func (cli *DockerCli) CmdVersion(args ...string) (err error) {
cmd := cli.Subcmd("version", nil, "Show the Docker version information.", true)
tmplStr := cmd.String([]string{"f", "#format", "-format"}, "", "Format the output using the given go template")
cmd.Require(flag.Exact, 0)
cmd.ParseFlags(args, true)
if *tmplStr == "" {
*tmplStr = VersionTemplate
}
var tmpl *template.Template
if tmpl, err = template.New("").Funcs(funcMap).Parse(*tmplStr); err != nil {
return StatusError{StatusCode: 64,
Status: "Template parsing error: " + err.Error()}
}
vd := VersionData{
Client: types.Version{
Version: dockerversion.VERSION,
ApiVersion: api.Version,
GoVersion: runtime.Version(),
GitCommit: dockerversion.GITCOMMIT,
BuildTime: dockerversion.BUILDTIME,
Os: runtime.GOOS,
Arch: runtime.GOARCH,
Experimental: utils.ExperimentalBuild(),
},
}
defer func() {
if err2 := tmpl.Execute(cli.out, vd); err2 != nil && err == nil {
err = err2
}
cli.out.Write([]byte{'\n'})
}()
serverResp, err := cli.call("GET", "/version", nil, nil)
if err != nil {
return err
}
defer serverResp.body.Close()
if err = json.NewDecoder(serverResp.body).Decode(&vd.Server); err != nil {
return StatusError{StatusCode: 1,
Status: "Error reading remote version: " + err.Error()}
}
vd.ServerOK = true
return
}