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package main
import (
"encoding/json"
"fmt"
"os"
"strings"
"github.com/containers/common/pkg/auth"
"github.com/containers/common/pkg/completion"
"github.com/containers/common/pkg/report"
"github.com/containers/podman/v3/cmd/podman/common"
"github.com/containers/podman/v3/cmd/podman/registry"
"github.com/containers/podman/v3/pkg/domain/entities"
"github.com/containers/podman/v3/pkg/errorhandling"
"github.com/pkg/errors"
"github.com/spf13/cobra"
)
type cliAutoUpdateOptions struct {
entities.AutoUpdateOptions
format string
}
var (
autoUpdateOptions = cliAutoUpdateOptions{}
autoUpdateDescription = `Auto update containers according to their auto-update policy.
Auto-update policies are specified with the "io.containers.autoupdate" label.
Containers are expected to run in systemd units created with "podman-generate-systemd --new",
or similar units that create new containers in order to run the updated images.
Please refer to the podman-auto-update(1) man page for details.`
autoUpdateCommand = &cobra.Command{
Annotations: map[string]string{registry.EngineMode: registry.ABIMode},
Use: "auto-update [options]",
Short: "Auto update containers according to their auto-update policy",
Long: autoUpdateDescription,
RunE: autoUpdate,
ValidArgsFunction: completion.AutocompleteNone,
Example: `podman auto-update
podman auto-update --authfile ~/authfile.json`,
}
)
func init() {
registry.Commands = append(registry.Commands, registry.CliCommand{
Command: autoUpdateCommand,
})
flags := autoUpdateCommand.Flags()
authfileFlagName := "authfile"
flags.StringVar(&autoUpdateOptions.Authfile, authfileFlagName, auth.GetDefaultAuthFile(), "Path to the authentication file. Use REGISTRY_AUTH_FILE environment variable to override")
_ = autoUpdateCommand.RegisterFlagCompletionFunc(authfileFlagName, completion.AutocompleteDefault)
flags.BoolVar(&autoUpdateOptions.DryRun, "dry-run", false, "Check for pending updates")
flags.BoolVar(&autoUpdateOptions.Rollback, "rollback", true, "Rollback to previous image if update fails")
flags.StringVar(&autoUpdateOptions.format, "format", "", "Change the output format to JSON or a Go template")
_ = autoUpdateCommand.RegisterFlagCompletionFunc("format", common.AutocompleteFormat(autoUpdateOutput{}))
}
func autoUpdate(cmd *cobra.Command, args []string) error {
if len(args) > 0 {
// Backwards compat. System tests expect this error string.
return errors.Errorf("`%s` takes no arguments", cmd.CommandPath())
}
allReports, failures := registry.ContainerEngine().AutoUpdate(registry.GetContext(), autoUpdateOptions.AutoUpdateOptions)
if allReports == nil {
return errorhandling.JoinErrors(failures)
}
if err := writeTemplate(allReports, autoUpdateOptions.format); err != nil {
failures = append(failures, err)
}
return errorhandling.JoinErrors(failures)
}
type autoUpdateOutput struct {
Unit string
Container string
ContainerName string
ContainerID string
Image string
Policy string
Updated string
}
func reportsToOutput(allReports []*entities.AutoUpdateReport) []autoUpdateOutput {
output := make([]autoUpdateOutput, len(allReports))
for i, r := range allReports {
output[i] = autoUpdateOutput{
Unit: r.SystemdUnit,
Container: fmt.Sprintf("%s (%s)", r.ContainerID[:12], r.ContainerName),
ContainerName: r.ContainerName,
ContainerID: r.ContainerID,
Image: r.ImageName,
Policy: r.Policy,
Updated: r.Updated,
}
}
return output
}
func writeTemplate(allReports []*entities.AutoUpdateReport, inputFormat string) error {
var format string
var printHeader bool
output := reportsToOutput(allReports)
switch inputFormat {
case "":
rows := []string{"{{.Unit}}", "{{.Container}}", "{{.Image}}", "{{.Policy}}", "{{.Updated}}"}
format = "{{range . }}" + strings.Join(rows, "\t") + "\n{{end -}}"
printHeader = true
case "json":
prettyJSON, err := json.MarshalIndent(output, "", " ")
if err != nil {
return err
}
fmt.Println(string(prettyJSON))
return nil
default:
format = "{{range . }}" + inputFormat + "\n{{end -}}"
}
tmpl, err := report.NewTemplate("auto-update").Parse(format)
if err != nil {
return err
}
w, err := report.NewWriterDefault(os.Stdout)
if err != nil {
return err
}
defer w.Flush()
if printHeader {
headers := report.Headers(autoUpdateOutput{}, nil)
if err := tmpl.Execute(w, headers); err != nil {
return err
}
}
return tmpl.Execute(w, output)
}
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