Function newApp

cmd/nerdctl/main.go:203–371

()

}

func newApp() (*cobra.Command, error) {
	tomlPath := ncdefaults.NerdctlTOML()
	if v, ok := os.LookupEnv("NERDCTL_TOML"); ok {
		tomlPath = v
	}

	short := "nerdctl is a command line interface for containerd"
	long := fmt.Sprintf(`%s

Config file ($NERDCTL_TOML): %s
`, short, tomlPath)
	var rootCmd = &cobra.Command{
		Use:              "nerdctl",
		Short:            short,
		Long:             long,
		Version:          strings.TrimPrefix(version.GetVersion(), "v"),
		SilenceUsage:     true,
		SilenceErrors:    true,
		TraverseChildren: true, // required for global short hands like -a, -H, -n
	}

	rootCmd.SetUsageFunc(usage)
	aliasToBeInherited, err := initRootCmdFlags(rootCmd, tomlPath)
	if err != nil {
		return nil, err
	}

	if err := resetSavedSETUID(); err != nil {
		return nil, err
	}

	rootCmd.PersistentPreRunE = func(cmd *cobra.Command, args []string) error {
		globalOptions, err := helpers.ProcessRootCmdFlags(cmd)
		if err != nil {
			return err
		}
		debug := globalOptions.DebugFull
		if !debug {
			debug = globalOptions.Debug
		}
		if debug {
			log.SetLevel(log.DebugLevel.String())
		}
		address := globalOptions.Address
		if strings.Contains(address, "://") && !strings.HasPrefix(address, "unix://") {
			return fmt.Errorf("invalid address %q", address)
		}
		cgroupManager := globalOptions.CgroupManager
		if runtime.GOOS == "linux" {
			switch cgroupManager {
			case "systemd", "cgroupfs", "none":
			default:
				return fmt.Errorf("invalid cgroup-manager %q (supported values: \"systemd\", \"cgroupfs\", \"none\")", cgroupManager)
			}
		}

		// Since we store containers' stateful information on the filesystem per namespace, we need namespaces to be
		// valid, safe path segments.