forked from docker/cli
/
check.go
125 lines (113 loc) · 3.58 KB
/
check.go
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package engine
import (
"context"
"fmt"
"github.com/docker/cli/cli"
"github.com/docker/cli/cli/command"
"github.com/docker/cli/cli/command/formatter"
"github.com/docker/cli/internal/versions"
clitypes "github.com/docker/cli/types"
"github.com/pkg/errors"
"github.com/spf13/cobra"
)
type checkOptions struct {
registryPrefix string
preReleases bool
engineImage string
downgrades bool
upgrades bool
format string
quiet bool
sockPath string
}
func newCheckForUpdatesCommand(dockerCli command.Cli) *cobra.Command {
var options checkOptions
cmd := &cobra.Command{
Use: "check [OPTIONS]",
Short: "Check for available engine updates",
Args: cli.NoArgs,
RunE: func(cmd *cobra.Command, args []string) error {
return runCheck(dockerCli, options)
},
}
flags := cmd.Flags()
flags.StringVar(&options.registryPrefix, "registry-prefix", clitypes.RegistryPrefix, "Override the existing location where engine images are pulled")
flags.BoolVar(&options.downgrades, "downgrades", false, "Report downgrades (default omits older versions)")
flags.BoolVar(&options.preReleases, "pre-releases", false, "Include pre-release versions")
flags.StringVar(&options.engineImage, "engine-image", "", "Specify engine image (default uses the same image as currently running)")
flags.BoolVar(&options.upgrades, "upgrades", true, "Report available upgrades")
flags.StringVar(&options.format, "format", "", "Pretty-print updates using a Go template")
flags.BoolVarP(&options.quiet, "quiet", "q", false, "Only display available versions")
flags.StringVar(&options.sockPath, "containerd", "", "override default location of containerd endpoint")
return cmd
}
func runCheck(dockerCli command.Cli, options checkOptions) error {
if !isRoot() {
return errors.New("this command must be run as a privileged user")
}
ctx := context.Background()
client := dockerCli.Client()
serverVersion, err := client.ServerVersion(ctx)
if err != nil {
return err
}
availVersions, err := versions.GetEngineVersions(ctx, dockerCli.RegistryClient(false), options.registryPrefix, options.engineImage, serverVersion.Version)
if err != nil {
return err
}
availUpdates := []clitypes.Update{
{Type: "current", Version: serverVersion.Version},
}
if len(availVersions.Patches) > 0 {
availUpdates = append(availUpdates,
processVersions(
serverVersion.Version,
"patch",
options.preReleases,
availVersions.Patches)...)
}
if options.upgrades {
availUpdates = append(availUpdates,
processVersions(
serverVersion.Version,
"upgrade",
options.preReleases,
availVersions.Upgrades)...)
}
if options.downgrades {
availUpdates = append(availUpdates,
processVersions(
serverVersion.Version,
"downgrade",
options.preReleases,
availVersions.Downgrades)...)
}
format := options.format
if len(format) == 0 {
format = formatter.TableFormatKey
}
updatesCtx := formatter.Context{
Output: dockerCli.Out(),
Format: formatter.NewUpdatesFormat(format, options.quiet),
Trunc: false,
}
return formatter.UpdatesWrite(updatesCtx, availUpdates)
}
func processVersions(currentVersion, verType string,
includePrerelease bool,
availVersions []clitypes.DockerVersion) []clitypes.Update {
availUpdates := []clitypes.Update{}
for _, ver := range availVersions {
if !includePrerelease && ver.Prerelease() != "" {
continue
}
if ver.Tag != currentVersion {
availUpdates = append(availUpdates, clitypes.Update{
Type: verType,
Version: ver.Tag,
Notes: fmt.Sprintf("%s/%s", clitypes.ReleaseNotePrefix, ver.Tag),
})
}
}
return availUpdates
}