How to use persistentPreRunE method of cmd Package

Best K6 code snippet using cmd.persistentPreRunE

plugin.go

Source:plugin.go

1package plugin2import (3	"encoding/json"4	"fmt"5	"os"6	"sync"7	"github.com/docker/cli/cli"8	"github.com/docker/cli/cli-plugins/manager"9	"github.com/docker/cli/cli/command"10	"github.com/docker/cli/cli/connhelper"11	"github.com/docker/docker/client"12	"github.com/spf13/cobra"13)14// PersistentPreRunE must be called by any plugin command (or15// subcommand) which uses the cobra `PersistentPreRun*` hook. Plugins16// which do not make use of `PersistentPreRun*` do not need to call17// this (although it remains safe to do so). Plugins are recommended18// to use `PersistenPreRunE` to enable the error to be19// returned. Should not be called outside of a command's20// PersistentPreRunE hook and must not be run unless Run has been21// called.22var PersistentPreRunE func(*cobra.Command, []string) error23func runPlugin(dockerCli *command.DockerCli, plugin *cobra.Command, meta manager.Metadata) error {24	tcmd := newPluginCommand(dockerCli, plugin, meta)25	var persistentPreRunOnce sync.Once26	PersistentPreRunE = func(_ *cobra.Command, _ []string) error {27		var err error28		persistentPreRunOnce.Do(func() {29			var opts []command.InitializeOpt30			if os.Getenv("DOCKER_CLI_PLUGIN_USE_DIAL_STDIO") != "" {31				opts = append(opts, withPluginClientConn(plugin.Name()))32			}33			err = tcmd.Initialize(opts...)34		})35		return err36	}37	cmd, args, err := tcmd.HandleGlobalFlags()38	if err != nil {39		return err40	}41	// We've parsed global args already, so reset args to those42	// which remain.43	cmd.SetArgs(args)44	return cmd.Execute()45}46// Run is the top-level entry point to the CLI plugin framework. It should be called from your plugin's `main()` function.47func Run(makeCmd func(command.Cli) *cobra.Command, meta manager.Metadata) {48	dockerCli, err := command.NewDockerCli()49	if err != nil {50		fmt.Fprintln(os.Stderr, err)51		os.Exit(1)52	}53	plugin := makeCmd(dockerCli)54	if err := runPlugin(dockerCli, plugin, meta); err != nil {55		if sterr, ok := err.(cli.StatusError); ok {56			if sterr.Status != "" {57				fmt.Fprintln(dockerCli.Err(), sterr.Status)58			}59			// StatusError should only be used for errors, and all errors should60			// have a non-zero exit status, so never exit with 061			if sterr.StatusCode == 0 {62				os.Exit(1)63			}64			os.Exit(sterr.StatusCode)65		}66		fmt.Fprintln(dockerCli.Err(), err)67		os.Exit(1)68	}69}70func withPluginClientConn(name string) command.InitializeOpt {71	return command.WithInitializeClient(func(dockerCli *command.DockerCli) (client.APIClient, error) {72		cmd := "docker"73		if x := os.Getenv(manager.ReexecEnvvar); x != "" {74			cmd = x75		}76		var flags []string77		// Accumulate all the global arguments, that is those78		// up to (but not including) the plugin's name. This79		// ensures that `docker system dial-stdio` is80		// evaluating the same set of `--config`, `--tls*` etc81		// global options as the plugin was called with, which82		// in turn is the same as what the original docker83		// invocation was passed.84		for _, a := range os.Args[1:] {85			if a == name {86				break87			}88			flags = append(flags, a)89		}90		flags = append(flags, "system", "dial-stdio")91		helper, err := connhelper.GetCommandConnectionHelper(cmd, flags...)92		if err != nil {93			return nil, err94		}95		return client.NewClientWithOpts(client.WithDialContext(helper.Dialer))96	})97}98func newPluginCommand(dockerCli *command.DockerCli, plugin *cobra.Command, meta manager.Metadata) *cli.TopLevelCommand {99	name := plugin.Name()100	fullname := manager.NamePrefix + name101	cmd := &cobra.Command{102		Use:           fmt.Sprintf("docker [OPTIONS] %s [ARG...]", name),103		Short:         fullname + " is a Docker CLI plugin",104		SilenceUsage:  true,105		SilenceErrors: true,106		PersistentPreRunE: func(cmd *cobra.Command, args []string) error {107			// We can't use this as the hook directly since it is initialised later (in runPlugin)108			return PersistentPreRunE(cmd, args)109		},110		TraverseChildren:      true,111		DisableFlagsInUseLine: true,112	}113	opts, flags := cli.SetupPluginRootCommand(cmd)114	cmd.SetOutput(dockerCli.Out())115	cmd.AddCommand(116		plugin,117		newMetadataSubcommand(plugin, meta),118	)119	cli.DisableFlagsInUseLine(cmd)120	return cli.NewTopLevelCommand(cmd, dockerCli, opts, flags)121}122func newMetadataSubcommand(plugin *cobra.Command, meta manager.Metadata) *cobra.Command {123	if meta.ShortDescription == "" {124		meta.ShortDescription = plugin.Short125	}126	cmd := &cobra.Command{127		Use:    manager.MetadataSubcommandName,128		Hidden: true,129		// Suppress the global/parent PersistentPreRunE, which130		// needlessly initializes the client and tries to131		// connect to the daemon.132		PersistentPreRun: func(cmd *cobra.Command, args []string) {},133		RunE: func(cmd *cobra.Command, args []string) error {134			enc := json.NewEncoder(os.Stdout)135			enc.SetEscapeHTML(false)136			enc.SetIndent("", "     ")137			return enc.Encode(meta)138		},139	}140	return cmd141}...

cobra.go

Source:cobra.go

1package cmd2import (3	"github.com/spf13/cobra"4)5func AddSubCommand(cmd *cobra.Command, subCmd *cobra.Command) {6	if subCmd.PersistentPreRun != nil {7		innerFn := subCmd.PersistentPreRun8		subCmd.PersistentPreRun = func(cmd *cobra.Command, args []string) {9			if cmd.Parent().PersistentPreRun != nil {10				cmd.Parent().PersistentPreRun(cmd, args)11			}12			innerFn(cmd, args)13		}14	}15	if subCmd.PersistentPreRunE != nil {16		innerFn := subCmd.PersistentPreRunE17		subCmd.PersistentPreRunE = func(cmd *cobra.Command, args []string) error {18			if cmd.Parent().PersistentPreRunE != nil {19				if err := cmd.Parent().PersistentPreRunE(cmd, args); err != nil {20					return err21				}22			}23			return innerFn(cmd, args)24		}25	}26	if subCmd.PersistentPostRun != nil {27		innerFn := subCmd.PersistentPostRun28		subCmd.PersistentPostRun = func(cmd *cobra.Command, args []string) {29			if cmd.Parent().PersistentPostRun != nil {30				cmd.Parent().PersistentPostRun(cmd, args)31			}32			innerFn(cmd, args)33		}34	}35	if subCmd.PersistentPostRunE != nil {36		innerFn := subCmd.PersistentPostRunE37		subCmd.PersistentPostRunE = func(cmd *cobra.Command, args []string) error {38			if cmd.Parent().PersistentPostRunE != nil {39				if err := cmd.Parent().PersistentPostRunE(cmd, args); err != nil {40					return err41				}42			}43			return innerFn(cmd, args)44		}45	}46	cmd.AddCommand(subCmd)47}...

app.go

Source:app.go

1package main2import (3	"errors"4	"fmt"5	"github.com/spf13/cobra"6)7// The *Run functions are executed in the following order:8//   * PersistentPreRun()9//   * PreRun()10//   * Run()11//   * PostRun()12//   * PersistentPostRun()13func main() {14	cmd := &cobra.Command{15		Use: "app",16		PersistentPreRunE: func(cmd *cobra.Command, args []string) error {17			fmt.Println("This is PersistentPreRunE")18			// return errors.New("this error is from PersistentPreRunE")19			return nil20		},21		PersistentPreRun: func(cmd *cobra.Command, args []string) {22			fmt.Println("This is PersistentPreRun")23		},24		PreRun: func(cmd *cobra.Command, args []string) {25			fmt.Println("This is PreRun")26		},27		Run: func(cmd *cobra.Command, args []string) {28			fmt.Println("This is Run")29		},30		RunE: func(cmd *cobra.Command, args []string) error {31			fmt.Println("This is RunE")32			// return errors.New("this error is from RunE")33			return nil34		},35		PostRun: func(cmd *cobra.Command, args []string) {36			fmt.Println("This is PreRun")37		},38		PersistentPostRun: func(cmd *cobra.Command, args []string) {39			fmt.Println("This is PersistentPostRun")40		},41		PersistentPostRunE: func(cmd *cobra.Command, args []string) error {42			fmt.Println("This is PersistentPostRunE")43			return errors.New("this error is from PersistentPostRunE")44		},45	}46	err := cmd.Execute()47	fmt.Println(err)48}...

persistentPreRunE

Using AI Code Generation

1import (2func main() {3	var rootCmd = &cobra.Command{Use: "app", PersistentPreRunE: func(cmd *cobra.Command, args []string) error {4		fmt.Println("PersistentPreRunE")5	}, Run: func(cmd *cobra.Command, args []string) {6		fmt.Println("Run")7	}}8	if err := rootCmd.Execute(); err != nil {9		fmt.Println(err)10		os.Exit(1)11	}12}

persistentPreRunE

Using AI Code Generation

1import (2var cmd1 = &cobra.Command{3	Run: func(cmd *cobra.Command, args []string) {4		fmt.Println("cmd1")5	},6	PersistentPreRunE: func(cmd *cobra.Command, args []string) error {7		fmt.Println("cmd1 PersistentPreRunE")8	},9}10var cmd2 = &cobra.Command{11	Run: func(cmd *cobra.Command, args []string) {12		fmt.Println("cmd2")13	},14	PersistentPreRunE: func(cmd *cobra.Command, args []string) error {15		fmt.Println("cmd2 PersistentPreRunE")16	},17}18func main() {19	cmd1.AddCommand(cmd2)20	cmd1.Execute()21}22import (23var cmd1 = &cobra.Command{24	Run: func(cmd *cobra.Command, args []string) {25		fmt.Println("cmd1")26	},27	PersistentPreRun: func(cmd *cobra.Command, args []string) {28		fmt.Println("cmd1 PersistentPreRun")29	},30}31var cmd2 = &cobra.Command{32	Run: func(cmd *cobra.Command, args []string) {33		fmt.Println("cmd2")34	},35	PersistentPreRun: func(cmd *cobra.Command, args []string) {36		fmt.Println("cmd2 PersistentPreRun")37	},38}39func main() {40	cmd1.AddCommand(cmd2)41	cmd1.Execute()42}43import (

persistentPreRunE

Using AI Code Generation

1import (2func main() {3	var cmd = &cobra.Command{4		Run: func(cmd *cobra.Command, args []string) {5			fmt.Println("Run called")6		},7		PersistentPreRunE: func(cmd *cobra.Command, args []string) error {8			fmt.Println("PersistentPreRunE called")9		},10	}11	if err := cmd.Execute(); err != nil {12		fmt.Println(err)13		os.Exit(1)14	}15}16import (17func main() {18	var cmd = &cobra.Command{19		Run: func(cmd *cobra.Command, args []string) {20			fmt.Println("Run called")21		},22		PreRunE: func(cmd *cobra.Command, args []string) error {23			fmt.Println("PreRunE called")24		},25	}26	if err := cmd.Execute(); err != nil {27		fmt.Println(err)28		os.Exit(1)29	}30}31import (32func main() {33	var cmd = &cobra.Command{34		Run: func(cmd *cobra.Command, args []

persistentPreRunE

Using AI Code Generation

1import (2func main() {3	var cmd = &cobra.Command{4	}5	var cmd1 = &cobra.Command{6	}7	var cmd2 = &cobra.Command{8	}9	var cmd3 = &cobra.Command{10	}11	cmd1.PersistentPreRunE = func(cmd *cobra.Command, args []string) error {12		fmt.Println("cmd1 pre run")13	}14	cmd.AddCommand(cmd1)15	cmd.AddCommand(cmd2)16	cmd.AddCommand(cmd3)17	if err := cmd.Execute(); err != nil {18		log.Fatal(err)19		os.Exit(1)20	}21}

persistentPreRunE

Using AI Code Generation

1import (2func main() {3	var cmd = &cobra.Command{4		Run: func(cmd *cobra.Command, args []string) {5			fmt.Println("hello")6		},7		PersistentPreRunE: func(cmd *cobra.Command, args []string) error {8			fmt.Println("hello persistent")9		},10	}11	cmd.Execute()12}13import (14func main() {15	var cmd = &cobra.Command{16		Run: func(cmd *cobra.Command, args []string) {17			fmt.Println("hello")18		},19		PersistentPostRunE: func(cmd *cobra.Command, args []string) error {20			fmt.Println("hello persistent")21		},22	}23	cmd.Execute()24}25import (26func main() {27	var cmd = &cobra.Command{28		Run: func(cmd *cobra.Command, args []string) {29			fmt.Println("hello")30		},31		PreRunE: func(cmd *cobra.Command, args []string) error {32			fmt.Println("hello persistent")33		},34	}35	cmd.Execute()36}37import (38func main() {39	var cmd = &cobra.Command{40		Run: func(cmd *cobra.Command, args []string) {41			fmt.Println("hello")42		},43		PostRunE: func(cmd *cobra.Command, args []string) error {44			fmt.Println("hello persistent")45		},

persistentPreRunE

Using AI Code Generation

1import (2func main() {3	var cmd = &cobra.Command{4		Run: func(cmd *cobra.Command, args []string) {5			fmt.Println("hello called")6		},7		PersistentPreRunE: func(cmd *cobra.Command, args []string) error {8			fmt.Println("hello called")9		},10	}11	if err := cmd.Execute(); err != nil {12		fmt.Println(err)13		os.Exit(1)14	}15}16import (17func main() {18	var cmd = &cobra.Command{19		Run: func(cmd *cobra.Command, args []string) {20			fmt.Println("hello called")21		},22		PersistentPreRun: func(cmd *cobra.Command, args []string) {23			fmt.Println("hello called")24		},25	}26	if err := cmd.Execute(); err != nil {27		fmt.Println(err)28		os.Exit(1)29	}30}31import (32func main() {33	var cmd = &cobra.Command{34		Run: func(cmd *cobra.Command, args []string) {35			fmt.Println("hello called")36		},37		PreRunE: func(cmd *cobra.Command, args []string) error {38			fmt.Println("hello called")39		},40	}41	if err := cmd.Execute(); err != nil {42		fmt.Println(err)43		os.Exit(1)44	}45}46import (47func main() {

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