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version.go
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version.go
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package system
import (
"context"
"runtime"
"sort"
"strconv"
"text/template"
"time"
"github.com/docker/cli/cli"
"github.com/docker/cli/cli/command"
"github.com/docker/cli/cli/command/completion"
"github.com/docker/cli/cli/command/formatter/tabwriter"
"github.com/docker/cli/cli/version"
"github.com/docker/cli/templates"
"github.com/docker/docker/api/types"
"github.com/pkg/errors"
"github.com/spf13/cobra"
"github.com/tonistiigi/go-rosetta"
)
var versionTemplate = `{{with .Client -}}
Client:{{if ne .Platform.Name ""}} {{.Platform.Name}}{{end}}
Version: {{.Version}}
API version: {{.APIVersion}}{{if ne .APIVersion .DefaultAPIVersion}} (downgraded from {{.DefaultAPIVersion}}){{end}}
Go version: {{.GoVersion}}
Git commit: {{.GitCommit}}
Built: {{.BuildTime}}
OS/Arch: {{.Os}}/{{.Arch}}
Context: {{.Context}}
{{- end}}
{{- if .ServerOK}}{{with .Server}}
Server:{{if ne .Platform.Name ""}} {{.Platform.Name}}{{end}}
{{- range $component := .Components}}
{{$component.Name}}:
{{- if eq $component.Name "Engine" }}
Version: {{.Version}}
API version: {{index .Details "ApiVersion"}} (minimum version {{index .Details "MinAPIVersion"}})
Go version: {{index .Details "GoVersion"}}
Git commit: {{index .Details "GitCommit"}}
Built: {{index .Details "BuildTime"}}
OS/Arch: {{index .Details "Os"}}/{{index .Details "Arch"}}
Experimental: {{index .Details "Experimental"}}
{{- else }}
Version: {{$component.Version}}
{{- $detailsOrder := getDetailsOrder $component}}
{{- range $key := $detailsOrder}}
{{$key}}: {{index $component.Details $key}}
{{- end}}
{{- end}}
{{- end}}
{{- end}}{{- 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 {
Platform struct{ Name string } `json:",omitempty"`
Version string
APIVersion string `json:"ApiVersion"`
DefaultAPIVersion string `json:"DefaultAPIVersion,omitempty"`
GitCommit string
GoVersion string
Os string
Arch string
BuildTime string `json:",omitempty"`
Context string
}
// 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.Cli) *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)
},
Annotations: map[string]string{
"category-top": "10",
},
ValidArgsFunction: completion.NoComplete,
}
flags := cmd.Flags()
flags.StringVarP(&opts.format, "format", "f", "", "Format the output using the given Go template")
return cmd
}
func reformatDate(buildTime string) string {
t, errTime := time.Parse(time.RFC3339Nano, buildTime)
if errTime == nil {
return t.Format(time.ANSIC)
}
return buildTime
}
func arch() string {
arch := runtime.GOARCH
if rosetta.Enabled() {
arch += " (rosetta)"
}
return arch
}
func runVersion(dockerCli command.Cli, opts *versionOptions) error {
var err error
tmpl, err := newVersionTemplate(opts.format)
if err != nil {
return cli.StatusError{StatusCode: 64, Status: err.Error()}
}
// TODO print error if kubernetes is used?
vd := versionInfo{
Client: clientVersion{
Platform: struct{ Name string }{version.PlatformName},
Version: version.Version,
APIVersion: dockerCli.CurrentVersion(),
DefaultAPIVersion: dockerCli.DefaultVersion(),
GoVersion: runtime.Version(),
GitCommit: version.GitCommit,
BuildTime: reformatDate(version.BuildTime),
Os: runtime.GOOS,
Arch: arch(),
Context: dockerCli.CurrentContext(),
},
}
sv, err := dockerCli.Client().ServerVersion(context.Background())
if err == nil {
vd.Server = &sv
foundEngine := false
for _, component := range sv.Components {
switch component.Name {
case "Engine":
foundEngine = true
buildTime, ok := component.Details["BuildTime"]
if ok {
component.Details["BuildTime"] = reformatDate(buildTime)
}
}
}
if !foundEngine {
vd.Server.Components = append(vd.Server.Components, types.ComponentVersion{
Name: "Engine",
Version: sv.Version,
Details: map[string]string{
"ApiVersion": sv.APIVersion,
"MinAPIVersion": sv.MinAPIVersion,
"GitCommit": sv.GitCommit,
"GoVersion": sv.GoVersion,
"Os": sv.Os,
"Arch": sv.Arch,
"BuildTime": reformatDate(vd.Server.BuildTime),
"Experimental": strconv.FormatBool(sv.Experimental),
},
})
}
}
if err2 := prettyPrintVersion(dockerCli, vd, tmpl); err2 != nil && err == nil {
err = err2
}
return err
}
func prettyPrintVersion(dockerCli command.Cli, vd versionInfo, tmpl *template.Template) error {
t := tabwriter.NewWriter(dockerCli.Out(), 20, 1, 1, ' ', 0)
err := tmpl.Execute(t, vd)
t.Write([]byte("\n"))
t.Flush()
return err
}
func newVersionTemplate(templateFormat string) (*template.Template, error) {
if templateFormat == "" {
templateFormat = versionTemplate
}
tmpl := templates.New("version").Funcs(template.FuncMap{"getDetailsOrder": getDetailsOrder})
tmpl, err := tmpl.Parse(templateFormat)
return tmpl, errors.Wrap(err, "template parsing error")
}
func getDetailsOrder(v types.ComponentVersion) []string {
out := make([]string, 0, len(v.Details))
for k := range v.Details {
out = append(out, k)
}
sort.Strings(out)
return out
}