chore(cli): upgrade urfave/cli to v2 version (#85)

chore(cli): upgrade urfave/cli to v2 version

Co-authored-by: Bo-Yi Wu <appleboy.tw@gmail.com>
Reviewed-by: Lunny Xiao <xiaolunwen@gmail.com>
Reviewed-by: Andrew Thornton <art27@cantab.net>

vendor/github.com/urfave/cli/v2/.flake8

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+[flake8]
+max-line-length = 120

vendor/github.com/urfave/cli/v2/.gitignore

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+*.coverprofile
+*.orig
+node_modules/
+vendor
+.idea

vendor/github.com/urfave/cli/v2/CODE_OF_CONDUCT.md

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+# Contributor Covenant Code of Conduct
+
+## Our Pledge
+
+In the interest of fostering an open and welcoming environment, we as
+contributors and maintainers pledge to making participation in our project and
+our community a harassment-free experience for everyone, regardless of age, body
+size, disability, ethnicity, gender identity and expression, level of experience,
+education, socio-economic status, nationality, personal appearance, race,
+religion, or sexual identity and orientation.
+
+## Our Standards
+
+Examples of behavior that contributes to creating a positive environment
+include:
+
+* Using welcoming and inclusive language
+* Being respectful of differing viewpoints and experiences
+* Gracefully accepting constructive criticism
+* Focusing on what is best for the community
+* Showing empathy towards other community members
+
+Examples of unacceptable behavior by participants include:
+
+* The use of sexualized language or imagery and unwelcome sexual attention or
+  advances
+* Trolling, insulting/derogatory comments, and personal or political attacks
+* Public or private harassment
+* Publishing others' private information, such as a physical or electronic
+  address, without explicit permission
+* Other conduct which could reasonably be considered inappropriate in a
+  professional setting
+
+## Our Responsibilities
+
+Project maintainers are responsible for clarifying the standards of acceptable
+behavior and are expected to take appropriate and fair corrective action in
+response to any instances of unacceptable behavior.
+
+Project maintainers have the right and responsibility to remove, edit, or
+reject comments, commits, code, wiki edits, issues, and other contributions
+that are not aligned to this Code of Conduct, or to ban temporarily or
+permanently any contributor for other behaviors that they deem inappropriate,
+threatening, offensive, or harmful.
+
+## Scope
+
+This Code of Conduct applies both within project spaces and in public spaces
+when an individual is representing the project or its community. Examples of
+representing a project or community include using an official project e-mail
+address, posting via an official social media account, or acting as an appointed
+representative at an online or offline event. Representation of a project may be
+further defined and clarified by project maintainers.
+
+## Enforcement
+
+Instances of abusive, harassing, or otherwise unacceptable behavior may be
+reported by contacting Dan Buch at dan@meatballhat.com. All complaints will be
+reviewed and investigated and will result in a response that is deemed necessary
+and appropriate to the circumstances. The project team is obligated to maintain
+confidentiality with regard to the reporter of an incident.  Further details of
+specific enforcement policies may be posted separately.
+
+Project maintainers who do not follow or enforce the Code of Conduct in good
+faith may face temporary or permanent repercussions as determined by other
+members of the project's leadership.
+
+## Attribution
+
+This Code of Conduct is adapted from the [Contributor Covenant][homepage], version 1.4,
+available at https://www.contributor-covenant.org/version/1/4/code-of-conduct.html
+
+[homepage]: https://www.contributor-covenant.org
+

vendor/github.com/urfave/cli/v2/LICENSE

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+MIT License
+
+Copyright (c) 2016 Jeremy Saenz & Contributors
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

vendor/github.com/urfave/cli/v2/README.md

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+cli
+===
+
+[![Windows Build Status](https://ci.appveyor.com/api/projects/status/rtgk5xufi932pb2v?svg=true)](https://ci.appveyor.com/project/urfave/cli)
+
+[![GoDoc](https://godoc.org/github.com/urfave/cli?status.svg)](https://godoc.org/github.com/urfave/cli)
+[![codebeat](https://codebeat.co/badges/0a8f30aa-f975-404b-b878-5fab3ae1cc5f)](https://codebeat.co/projects/github-com-urfave-cli)
+[![Go Report Card](https://goreportcard.com/badge/urfave/cli)](https://goreportcard.com/report/urfave/cli)
+[![codecov](https://codecov.io/gh/urfave/cli/branch/master/graph/badge.svg)](https://codecov.io/gh/urfave/cli)
+
+cli is a simple, fast, and fun package for building command line apps in Go. The
+goal is to enable developers to write fast and distributable command line
+applications in an expressive way.
+
+## Usage Documentation
+
+Usage documentation exists for each major version. Don't know what version you're on? You're probably using the version from the `master` branch, which is currently `v2`.
+
+- `v2` - [./docs/v2/manual.md](./docs/v2/manual.md)
+- `v1` - [./docs/v1/manual.md](./docs/v1/manual.md)
+
+## Installation
+
+Make sure you have a working Go environment.  Go version 1.11+ is supported. [See the install instructions for Go](http://golang.org/doc/install.html).
+
+Go Modules are strongly recommended when using this package. [See the go blog guide on using Go Modules](https://blog.golang.org/using-go-modules).
+
+### Using `v2` releases
+
+```
+$ GO111MODULE=on go get github.com/urfave/cli/v2
+```
+
+```go
+...
+import (
+  "github.com/urfave/cli/v2" // imports as package "cli"
+)
+...
+```
+
+### Using `v1` releases
+
+```
+$ GO111MODULE=on go get github.com/urfave/cli
+```
+
+```go
+...
+import (
+  "github.com/urfave/cli"
+)
+...
+```
+
+### GOPATH
+
+Make sure your `PATH` includes the `$GOPATH/bin` directory so your commands can
+be easily used:
+```
+export PATH=$PATH:$GOPATH/bin
+```
+
+### Supported platforms
+
+cli is tested against multiple versions of Go on Linux, and against the latest
+released version of Go on OS X and Windows. This project uses Github Actions for
+builds. For more build info, please look at the [./.github/workflows/cli.yml](https://github.com/urfave/cli/blob/master/.github/workflows/cli.yml).

vendor/github.com/urfave/cli/v2/app.go

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+package cli
+
+import (
+	"context"
+	"flag"
+	"fmt"
+	"io"
+	"os"
+	"path/filepath"
+	"reflect"
+	"sort"
+	"time"
+)
+
+var (
+	changeLogURL            = "https://github.com/urfave/cli/blob/master/docs/CHANGELOG.md"
+	appActionDeprecationURL = fmt.Sprintf("%s#deprecated-cli-app-action-signature", changeLogURL)
+	contactSysadmin         = "This is an error in the application.  Please contact the distributor of this application if this is not you."
+	errInvalidActionType    = NewExitError("ERROR invalid Action type. "+
+		fmt.Sprintf("Must be `func(*Context`)` or `func(*Context) error).  %s", contactSysadmin)+
+		fmt.Sprintf("See %s", appActionDeprecationURL), 2)
+)
+
+// App is the main structure of a cli application. It is recommended that
+// an app be created with the cli.NewApp() function
+type App struct {
+	// The name of the program. Defaults to path.Base(os.Args[0])
+	Name string
+	// Full name of command for help, defaults to Name
+	HelpName string
+	// Description of the program.
+	Usage string
+	// Text to override the USAGE section of help
+	UsageText string
+	// Description of the program argument format.
+	ArgsUsage string
+	// Version of the program
+	Version string
+	// Description of the program
+	Description string
+	// List of commands to execute
+	Commands []*Command
+	// List of flags to parse
+	Flags []Flag
+	// Boolean to enable bash completion commands
+	EnableBashCompletion bool
+	// Boolean to hide built-in help command
+	HideHelp bool
+	// Boolean to hide built-in version flag and the VERSION section of help
+	HideVersion bool
+	// categories contains the categorized commands and is populated on app startup
+	categories CommandCategories
+	// An action to execute when the shell completion flag is set
+	BashComplete BashCompleteFunc
+	// An action to execute before any subcommands are run, but after the context is ready
+	// If a non-nil error is returned, no subcommands are run
+	Before BeforeFunc
+	// An action to execute after any subcommands are run, but after the subcommand has finished
+	// It is run even if Action() panics
+	After AfterFunc
+	// The action to execute when no subcommands are specified
+	Action ActionFunc
+	// Execute this function if the proper command cannot be found
+	CommandNotFound CommandNotFoundFunc
+	// Execute this function if an usage error occurs
+	OnUsageError OnUsageErrorFunc
+	// Compilation date
+	Compiled time.Time
+	// List of all authors who contributed
+	Authors []*Author
+	// Copyright of the binary if any
+	Copyright string
+	// Writer writer to write output to
+	Writer io.Writer
+	// ErrWriter writes error output
+	ErrWriter io.Writer
+	// Execute this function to handle ExitErrors. If not provided, HandleExitCoder is provided to
+	// function as a default, so this is optional.
+	ExitErrHandler ExitErrHandlerFunc
+	// Other custom info
+	Metadata map[string]interface{}
+	// Carries a function which returns app specific info.
+	ExtraInfo func() map[string]string
+	// CustomAppHelpTemplate the text template for app help topic.
+	// cli.go uses text/template to render templates. You can
+	// render custom help text by setting this variable.
+	CustomAppHelpTemplate string
+	// Boolean to enable short-option handling so user can combine several
+	// single-character bool arguments into one
+	// i.e. foobar -o -v -> foobar -ov
+	UseShortOptionHandling bool
+
+	didSetup bool
+}
+
+// Tries to find out when this binary was compiled.
+// Returns the current time if it fails to find it.
+func compileTime() time.Time {
+	info, err := os.Stat(os.Args[0])
+	if err != nil {
+		return time.Now()
+	}
+	return info.ModTime()
+}
+
+// NewApp creates a new cli Application with some reasonable defaults for Name,
+// Usage, Version and Action.
+func NewApp() *App {
+	return &App{
+		Name:         filepath.Base(os.Args[0]),
+		HelpName:     filepath.Base(os.Args[0]),
+		Usage:        "A new cli application",
+		UsageText:    "",
+		BashComplete: DefaultAppComplete,
+		Action:       helpCommand.Action,
+		Compiled:     compileTime(),
+		Writer:       os.Stdout,
+	}
+}
+
+// Setup runs initialization code to ensure all data structures are ready for
+// `Run` or inspection prior to `Run`.  It is internally called by `Run`, but
+// will return early if setup has already happened.
+func (a *App) Setup() {
+	if a.didSetup {
+		return
+	}
+
+	a.didSetup = true
+
+	if a.Name == "" {
+		a.Name = filepath.Base(os.Args[0])
+	}
+
+	if a.HelpName == "" {
+		a.HelpName = filepath.Base(os.Args[0])
+	}
+
+	if a.Usage == "" {
+		a.Usage = "A new cli application"
+	}
+
+	if a.Version == "" {
+		a.HideVersion = true
+	}
+
+	if a.BashComplete == nil {
+		a.BashComplete = DefaultAppComplete
+	}
+
+	if a.Action == nil {
+		a.Action = helpCommand.Action
+	}
+
+	if a.Compiled == (time.Time{}) {
+		a.Compiled = compileTime()
+	}
+
+	if a.Writer == nil {
+		a.Writer = os.Stdout
+	}
+
+	var newCommands []*Command
+
+	for _, c := range a.Commands {
+		if c.HelpName == "" {
+			c.HelpName = fmt.Sprintf("%s %s", a.HelpName, c.Name)
+		}
+		newCommands = append(newCommands, c)
+	}
+	a.Commands = newCommands
+
+	if a.Command(helpCommand.Name) == nil && !a.HideHelp {
+		a.appendCommand(helpCommand)
+
+		if HelpFlag != nil {
+			a.appendFlag(HelpFlag)
+		}
+	}
+
+	if !a.HideVersion {
+		a.appendFlag(VersionFlag)
+	}
+
+	a.categories = newCommandCategories()
+	for _, command := range a.Commands {
+		a.categories.AddCommand(command.Category, command)
+	}
+	sort.Sort(a.categories.(*commandCategories))
+
+	if a.Metadata == nil {
+		a.Metadata = make(map[string]interface{})
+	}
+
+	if a.Writer == nil {
+		a.Writer = os.Stdout
+	}
+}
+
+func (a *App) newFlagSet() (*flag.FlagSet, error) {
+	return flagSet(a.Name, a.Flags)
+}
+
+func (a *App) useShortOptionHandling() bool {
+	return a.UseShortOptionHandling
+}
+
+// Run is the entry point to the cli app. Parses the arguments slice and routes
+// to the proper flag/args combination
+func (a *App) Run(arguments []string) (err error) {
+	return a.RunContext(context.Background(), arguments)
+}
+
+// RunContext is like Run except it takes a Context that will be
+// passed to its commands and sub-commands. Through this, you can
+// propagate timeouts and cancellation requests
+func (a *App) RunContext(ctx context.Context, arguments []string) (err error) {
+	a.Setup()
+
+	// handle the completion flag separately from the flagset since
+	// completion could be attempted after a flag, but before its value was put
+	// on the command line. this causes the flagset to interpret the completion
+	// flag name as the value of the flag before it which is undesirable
+	// note that we can only do this because the shell autocomplete function
+	// always appends the completion flag at the end of the command
+	shellComplete, arguments := checkShellCompleteFlag(a, arguments)
+
+	set, err := a.newFlagSet()
+	if err != nil {
+		return err
+	}
+
+	err = parseIter(set, a, arguments[1:], shellComplete)
+	nerr := normalizeFlags(a.Flags, set)
+	context := NewContext(a, set, &Context{Context: ctx})
+	if nerr != nil {
+		_, _ = fmt.Fprintln(a.Writer, nerr)
+		_ = ShowAppHelp(context)
+		return nerr
+	}
+	context.shellComplete = shellComplete
+
+	if checkCompletions(context) {
+		return nil
+	}
+
+	if err != nil {
+		if a.OnUsageError != nil {
+			err := a.OnUsageError(context, err, false)
+			a.handleExitCoder(context, err)
+			return err
+		}
+		_, _ = fmt.Fprintf(a.Writer, "%s %s\n\n", "Incorrect Usage.", err.Error())
+		_ = ShowAppHelp(context)
+		return err
+	}
+
+	if !a.HideHelp && checkHelp(context) {
+		_ = ShowAppHelp(context)
+		return nil
+	}
+
+	if !a.HideVersion && checkVersion(context) {
+		ShowVersion(context)
+		return nil
+	}
+
+	cerr := checkRequiredFlags(a.Flags, context)
+	if cerr != nil {
+		_ = ShowAppHelp(context)
+		return cerr
+	}
+
+	if a.After != nil {
+		defer func() {
+			if afterErr := a.After(context); afterErr != nil {
+				if err != nil {
+					err = newMultiError(err, afterErr)
+				} else {
+					err = afterErr
+				}
+			}
+		}()
+	}
+
+	if a.Before != nil {
+		beforeErr := a.Before(context)
+		if beforeErr != nil {
+			_, _ = fmt.Fprintf(a.Writer, "%v\n\n", beforeErr)
+			_ = ShowAppHelp(context)
+			a.handleExitCoder(context, beforeErr)
+			err = beforeErr
+			return err
+		}
+	}
+
+	args := context.Args()
+	if args.Present() {
+		name := args.First()
+		c := a.Command(name)
+		if c != nil {
+			return c.Run(context)
+		}
+	}
+
+	if a.Action == nil {
+		a.Action = helpCommand.Action
+	}
+
+	// Run default Action
+	err = a.Action(context)
+
+	a.handleExitCoder(context, err)
+	return err
+}
+
+// RunAndExitOnError calls .Run() and exits non-zero if an error was returned
+//
+// Deprecated: instead you should return an error that fulfills cli.ExitCoder
+// to cli.App.Run. This will cause the application to exit with the given eror
+// code in the cli.ExitCoder
+func (a *App) RunAndExitOnError() {
+	if err := a.Run(os.Args); err != nil {
+		_, _ = fmt.Fprintln(a.errWriter(), err)
+		OsExiter(1)
+	}
+}
+
+// RunAsSubcommand invokes the subcommand given the context, parses ctx.Args() to
+// generate command-specific flags
+func (a *App) RunAsSubcommand(ctx *Context) (err error) {
+	a.Setup()
+
+	// append help to commands
+	if len(a.Commands) > 0 {
+		if a.Command(helpCommand.Name) == nil && !a.HideHelp {
+			a.appendCommand(helpCommand)
+
+			if HelpFlag != nil {
+				a.appendFlag(HelpFlag)
+			}
+		}
+	}
+
+	var newCmds []*Command
+	for _, c := range a.Commands {
+		if c.HelpName == "" {
+			c.HelpName = fmt.Sprintf("%s %s", a.HelpName, c.Name)
+		}
+		newCmds = append(newCmds, c)
+	}
+	a.Commands = newCmds
+
+	set, err := a.newFlagSet()
+	if err != nil {
+		return err
+	}
+
+	err = parseIter(set, a, ctx.Args().Tail(), ctx.shellComplete)
+	nerr := normalizeFlags(a.Flags, set)
+	context := NewContext(a, set, ctx)
+
+	if nerr != nil {
+		_, _ = fmt.Fprintln(a.Writer, nerr)
+		_, _ = fmt.Fprintln(a.Writer)
+		if len(a.Commands) > 0 {
+			_ = ShowSubcommandHelp(context)
+		} else {
+			_ = ShowCommandHelp(ctx, context.Args().First())
+		}
+		return nerr
+	}
+
+	if checkCompletions(context) {
+		return nil
+	}
+
+	if err != nil {
+		if a.OnUsageError != nil {
+			err = a.OnUsageError(context, err, true)
+			a.handleExitCoder(context, err)
+			return err
+		}
+		_, _ = fmt.Fprintf(a.Writer, "%s %s\n\n", "Incorrect Usage.", err.Error())
+		_ = ShowSubcommandHelp(context)
+		return err
+	}
+
+	if len(a.Commands) > 0 {
+		if checkSubcommandHelp(context) {
+			return nil
+		}
+	} else {
+		if checkCommandHelp(ctx, context.Args().First()) {
+			return nil
+		}
+	}
+
+	cerr := checkRequiredFlags(a.Flags, context)
+	if cerr != nil {
+		_ = ShowSubcommandHelp(context)
+		return cerr
+	}
+
+	if a.After != nil {
+		defer func() {
+			afterErr := a.After(context)
+			if afterErr != nil {
+				a.handleExitCoder(context, err)
+				if err != nil {
+					err = newMultiError(err, afterErr)
+				} else {
+					err = afterErr
+				}
+			}
+		}()
+	}
+
+	if a.Before != nil {
+		beforeErr := a.Before(context)
+		if beforeErr != nil {
+			a.handleExitCoder(context, beforeErr)
+			err = beforeErr
+			return err
+		}
+	}
+
+	args := context.Args()
+	if args.Present() {
+		name := args.First()
+		c := a.Command(name)
+		if c != nil {
+			return c.Run(context)
+		}
+	}
+
+	// Run default Action
+	err = a.Action(context)
+
+	a.handleExitCoder(context, err)
+	return err
+}
+
+// Command returns the named command on App. Returns nil if the command does not exist
+func (a *App) Command(name string) *Command {
+	for _, c := range a.Commands {
+		if c.HasName(name) {
+			return c
+		}
+	}
+
+	return nil
+}
+
+// VisibleCategories returns a slice of categories and commands that are
+// Hidden=false
+func (a *App) VisibleCategories() []CommandCategory {
+	ret := []CommandCategory{}
+	for _, category := range a.categories.Categories() {
+		if visible := func() CommandCategory {
+			if len(category.VisibleCommands()) > 0 {
+				return category
+			}
+			return nil
+		}(); visible != nil {
+			ret = append(ret, visible)
+		}
+	}
+	return ret
+}
+
+// VisibleCommands returns a slice of the Commands with Hidden=false
+func (a *App) VisibleCommands() []*Command {
+	var ret []*Command
+	for _, command := range a.Commands {
+		if !command.Hidden {
+			ret = append(ret, command)
+		}
+	}
+	return ret
+}
+
+// VisibleFlags returns a slice of the Flags with Hidden=false
+func (a *App) VisibleFlags() []Flag {
+	return visibleFlags(a.Flags)
+}
+
+func (a *App) hasFlag(flag Flag) bool {
+	for _, f := range a.Flags {
+		if reflect.DeepEqual(flag, f) {
+			return true
+		}
+	}
+
+	return false
+}
+
+func (a *App) errWriter() io.Writer {
+	// When the app ErrWriter is nil use the package level one.
+	if a.ErrWriter == nil {
+		return ErrWriter
+	}
+
+	return a.ErrWriter
+}
+
+func (a *App) appendFlag(fl Flag) {
+	if !hasFlag(a.Flags, fl) {
+		a.Flags = append(a.Flags, fl)
+	}
+}
+
+func (a *App) appendCommand(c *Command) {
+	if !hasCommand(a.Commands, c) {
+		a.Commands = append(a.Commands, c)
+	}
+}
+
+func (a *App) handleExitCoder(context *Context, err error) {
+	if a.ExitErrHandler != nil {
+		a.ExitErrHandler(context, err)
+	} else {
+		HandleExitCoder(err)
+	}
+}
+
+// Author represents someone who has contributed to a cli project.
+type Author struct {
+	Name  string // The Authors name
+	Email string // The Authors email
+}
+
+// String makes Author comply to the Stringer interface, to allow an easy print in the templating process
+func (a *Author) String() string {
+	e := ""
+	if a.Email != "" {
+		e = " <" + a.Email + ">"
+	}
+
+	return fmt.Sprintf("%v%v", a.Name, e)
+}
+
+// HandleAction attempts to figure out which Action signature was used.  If
+// it's an ActionFunc or a func with the legacy signature for Action, the func
+// is run!
+func HandleAction(action interface{}, context *Context) (err error) {
+	switch a := action.(type) {
+	case ActionFunc:
+		return a(context)
+	case func(*Context) error:
+		return a(context)
+	case func(*Context): // deprecated function signature
+		a(context)
+		return nil
+	}
+
+	return errInvalidActionType
+}

vendor/github.com/urfave/cli/v2/appveyor.yml

@@ -0,0 +1,28 @@
+version: "{build}"
+
+os: Windows Server 2016
+
+image: Visual Studio 2017
+
+clone_folder: c:\gopath\src\github.com\urfave\cli
+
+cache:
+  - node_modules
+
+environment:
+  GOPATH: C:\gopath
+  GOVERSION: 1.11.x
+  GO111MODULE: on
+  GOPROXY: https://proxy.golang.org
+
+install:
+  - set PATH=%GOPATH%\bin;C:\go\bin;%PATH%
+  - go version
+  - go env
+  - go get github.com/urfave/gfmrun/cmd/gfmrun
+  - go mod tidy
+
+build_script:
+  - go run build.go vet
+  - go run build.go test
+  - go run build.go gfmrun docs/v1/manual.md

vendor/github.com/urfave/cli/v2/args.go

@@ -0,0 +1,54 @@
+package cli
+
+type Args interface {
+	// Get returns the nth argument, or else a blank string
+	Get(n int) string
+	// First returns the first argument, or else a blank string
+	First() string
+	// Tail returns the rest of the arguments (not the first one)
+	// or else an empty string slice
+	Tail() []string
+	// Len returns the length of the wrapped slice
+	Len() int
+	// Present checks if there are any arguments present
+	Present() bool
+	// Slice returns a copy of the internal slice
+	Slice() []string
+}
+
+type args []string
+
+func (a *args) Get(n int) string {
+	if len(*a) > n {
+		return (*a)[n]
+	}
+	return ""
+}
+
+func (a *args) First() string {
+	return a.Get(0)
+}
+
+func (a *args) Tail() []string {
+	if a.Len() >= 2 {
+		tail := []string((*a)[1:])
+		ret := make([]string, len(tail))
+		copy(ret, tail)
+		return ret
+	}
+	return []string{}
+}
+
+func (a *args) Len() int {
+	return len(*a)
+}
+
+func (a *args) Present() bool {
+	return a.Len() != 0
+}
+
+func (a *args) Slice() []string {
+	ret := make([]string, len(*a))
+	copy(ret, *a)
+	return ret
+}

vendor/github.com/urfave/cli/v2/category.go

@@ -0,0 +1,79 @@
+package cli
+
+// CommandCategories interface allows for category manipulation
+type CommandCategories interface {
+	// AddCommand adds a command to a category, creating a new category if necessary.
+	AddCommand(category string, command *Command)
+	// categories returns a copy of the category slice
+	Categories() []CommandCategory
+}
+
+type commandCategories []*commandCategory
+
+func newCommandCategories() CommandCategories {
+	ret := commandCategories([]*commandCategory{})
+	return &ret
+}
+
+func (c *commandCategories) Less(i, j int) bool {
+	return lexicographicLess((*c)[i].Name(), (*c)[j].Name())
+}
+
+func (c *commandCategories) Len() int {
+	return len(*c)
+}
+
+func (c *commandCategories) Swap(i, j int) {
+	(*c)[i], (*c)[j] = (*c)[j], (*c)[i]
+}
+
+func (c *commandCategories) AddCommand(category string, command *Command) {
+	for _, commandCategory := range []*commandCategory(*c) {
+		if commandCategory.name == category {
+			commandCategory.commands = append(commandCategory.commands, command)
+			return
+		}
+	}
+	newVal := append(*c,
+		&commandCategory{name: category, commands: []*Command{command}})
+	*c = newVal
+}
+
+func (c *commandCategories) Categories() []CommandCategory {
+	ret := make([]CommandCategory, len(*c))
+	for i, cat := range *c {
+		ret[i] = cat
+	}
+	return ret
+}
+
+// CommandCategory is a category containing commands.
+type CommandCategory interface {
+	// Name returns the category name string
+	Name() string
+	// VisibleCommands returns a slice of the Commands with Hidden=false
+	VisibleCommands() []*Command
+}
+
+type commandCategory struct {
+	name     string
+	commands []*Command
+}
+
+func (c *commandCategory) Name() string {
+	return c.name
+}
+
+func (c *commandCategory) VisibleCommands() []*Command {
+	if c.commands == nil {
+		c.commands = []*Command{}
+	}
+
+	var ret []*Command
+	for _, command := range c.commands {
+		if !command.Hidden {
+			ret = append(ret, command)
+		}
+	}
+	return ret
+}

vendor/github.com/urfave/cli/v2/cli.go

@@ -0,0 +1,23 @@
+// Package cli provides a minimal framework for creating and organizing command line
+// Go applications. cli is designed to be easy to understand and write, the most simple
+// cli application can be written as follows:
+//   func main() {
+//     (&cli.App{}).Run(os.Args)
+//   }
+//
+// Of course this application does not do much, so let's make this an actual application:
+//   func main() {
+//     app := &cli.App{
+//			 Name: "greet",
+//			 Usage: "say a greeting",
+//			 Action: func(c *cli.Context) error {
+//				 fmt.Println("Greetings")
+//				 return nil
+//			 },
+//		 }
+//
+//     app.Run(os.Args)
+//   }
+package cli
+
+//go:generate go run flag-gen/main.go flag-gen/assets_vfsdata.go

vendor/github.com/urfave/cli/v2/command.go

@@ -0,0 +1,297 @@
+package cli
+
+import (
+	"flag"
+	"fmt"
+	"sort"
+	"strings"
+)
+
+// Command is a subcommand for a cli.App.
+type Command struct {
+	// The name of the command
+	Name string
+	// A list of aliases for the command
+	Aliases []string
+	// A short description of the usage of this command
+	Usage string
+	// Custom text to show on USAGE section of help
+	UsageText string
+	// A longer explanation of how the command works
+	Description string
+	// A short description of the arguments of this command
+	ArgsUsage string
+	// The category the command is part of
+	Category string
+	// The function to call when checking for bash command completions
+	BashComplete BashCompleteFunc
+	// An action to execute before any sub-subcommands are run, but after the context is ready
+	// If a non-nil error is returned, no sub-subcommands are run
+	Before BeforeFunc
+	// An action to execute after any subcommands are run, but after the subcommand has finished
+	// It is run even if Action() panics
+	After AfterFunc
+	// The function to call when this command is invoked
+	Action ActionFunc
+	// Execute this function if a usage error occurs.
+	OnUsageError OnUsageErrorFunc
+	// List of child commands
+	Subcommands []*Command
+	// List of flags to parse
+	Flags []Flag
+	// Treat all flags as normal arguments if true
+	SkipFlagParsing bool
+	// Boolean to hide built-in help command
+	HideHelp bool
+	// Boolean to hide this command from help or completion
+	Hidden bool
+	// Boolean to enable short-option handling so user can combine several
+	// single-character bool arguments into one
+	// i.e. foobar -o -v -> foobar -ov
+	UseShortOptionHandling bool
+
+	// Full name of command for help, defaults to full command name, including parent commands.
+	HelpName        string
+	commandNamePath []string
+
+	// CustomHelpTemplate the text template for the command help topic.
+	// cli.go uses text/template to render templates. You can
+	// render custom help text by setting this variable.
+	CustomHelpTemplate string
+}
+
+type Commands []*Command
+
+type CommandsByName []*Command
+
+func (c CommandsByName) Len() int {
+	return len(c)
+}
+
+func (c CommandsByName) Less(i, j int) bool {
+	return lexicographicLess(c[i].Name, c[j].Name)
+}
+
+func (c CommandsByName) Swap(i, j int) {
+	c[i], c[j] = c[j], c[i]
+}
+
+// FullName returns the full name of the command.
+// For subcommands this ensures that parent commands are part of the command path
+func (c *Command) FullName() string {
+	if c.commandNamePath == nil {
+		return c.Name
+	}
+	return strings.Join(c.commandNamePath, " ")
+}
+
+// Run invokes the command given the context, parses ctx.Args() to generate command-specific flags
+func (c *Command) Run(ctx *Context) (err error) {
+	if len(c.Subcommands) > 0 {
+		return c.startApp(ctx)
+	}
+
+	if !c.HideHelp && HelpFlag != nil {
+		// append help to flags
+		c.appendFlag(HelpFlag)
+	}
+
+	if ctx.App.UseShortOptionHandling {
+		c.UseShortOptionHandling = true
+	}
+
+	set, err := c.parseFlags(ctx.Args(), ctx.shellComplete)
+
+	context := NewContext(ctx.App, set, ctx)
+	context.Command = c
+	if checkCommandCompletions(context, c.Name) {
+		return nil
+	}
+
+	if err != nil {
+		if c.OnUsageError != nil {
+			err = c.OnUsageError(context, err, false)
+			context.App.handleExitCoder(context, err)
+			return err
+		}
+		_, _ = fmt.Fprintln(context.App.Writer, "Incorrect Usage:", err.Error())
+		_, _ = fmt.Fprintln(context.App.Writer)
+		_ = ShowCommandHelp(context, c.Name)
+		return err
+	}
+
+	if checkCommandHelp(context, c.Name) {
+		return nil
+	}
+
+	cerr := checkRequiredFlags(c.Flags, context)
+	if cerr != nil {
+		_ = ShowCommandHelp(context, c.Name)
+		return cerr
+	}
+
+	if c.After != nil {
+		defer func() {
+			afterErr := c.After(context)
+			if afterErr != nil {
+				context.App.handleExitCoder(context, err)
+				if err != nil {
+					err = newMultiError(err, afterErr)
+				} else {
+					err = afterErr
+				}
+			}
+		}()
+	}
+
+	if c.Before != nil {
+		err = c.Before(context)
+		if err != nil {
+			_ = ShowCommandHelp(context, c.Name)
+			context.App.handleExitCoder(context, err)
+			return err
+		}
+	}
+
+	if c.Action == nil {
+		c.Action = helpSubcommand.Action
+	}
+
+	context.Command = c
+	err = c.Action(context)
+
+	if err != nil {
+		context.App.handleExitCoder(context, err)
+	}
+	return err
+}
+
+func (c *Command) newFlagSet() (*flag.FlagSet, error) {
+	return flagSet(c.Name, c.Flags)
+}
+
+func (c *Command) useShortOptionHandling() bool {
+	return c.UseShortOptionHandling
+}
+
+func (c *Command) parseFlags(args Args, shellComplete bool) (*flag.FlagSet, error) {
+	set, err := c.newFlagSet()
+	if err != nil {
+		return nil, err
+	}
+
+	if c.SkipFlagParsing {
+		return set, set.Parse(append([]string{"--"}, args.Tail()...))
+	}
+
+	err = parseIter(set, c, args.Tail(), shellComplete)
+	if err != nil {
+		return nil, err
+	}
+
+	err = normalizeFlags(c.Flags, set)
+	if err != nil {
+		return nil, err
+	}
+
+	return set, nil
+}
+
+// Names returns the names including short names and aliases.
+func (c *Command) Names() []string {
+	return append([]string{c.Name}, c.Aliases...)
+}
+
+// HasName returns true if Command.Name matches given name
+func (c *Command) HasName(name string) bool {
+	for _, n := range c.Names() {
+		if n == name {
+			return true
+		}
+	}
+	return false
+}
+
+func (c *Command) startApp(ctx *Context) error {
+	app := &App{
+		Metadata: ctx.App.Metadata,
+		Name:     fmt.Sprintf("%s %s", ctx.App.Name, c.Name),
+	}
+
+	if c.HelpName == "" {
+		app.HelpName = c.HelpName
+	} else {
+		app.HelpName = app.Name
+	}
+
+	app.Usage = c.Usage
+	app.Description = c.Description
+	app.ArgsUsage = c.ArgsUsage
+
+	// set CommandNotFound
+	app.CommandNotFound = ctx.App.CommandNotFound
+	app.CustomAppHelpTemplate = c.CustomHelpTemplate
+
+	// set the flags and commands
+	app.Commands = c.Subcommands
+	app.Flags = c.Flags
+	app.HideHelp = c.HideHelp
+
+	app.Version = ctx.App.Version
+	app.HideVersion = ctx.App.HideVersion
+	app.Compiled = ctx.App.Compiled
+	app.Writer = ctx.App.Writer
+	app.ErrWriter = ctx.App.ErrWriter
+	app.ExitErrHandler = ctx.App.ExitErrHandler
+	app.UseShortOptionHandling = ctx.App.UseShortOptionHandling
+
+	app.categories = newCommandCategories()
+	for _, command := range c.Subcommands {
+		app.categories.AddCommand(command.Category, command)
+	}
+
+	sort.Sort(app.categories.(*commandCategories))
+
+	// bash completion
+	app.EnableBashCompletion = ctx.App.EnableBashCompletion
+	if c.BashComplete != nil {
+		app.BashComplete = c.BashComplete
+	}
+
+	// set the actions
+	app.Before = c.Before
+	app.After = c.After
+	if c.Action != nil {
+		app.Action = c.Action
+	} else {
+		app.Action = helpSubcommand.Action
+	}
+	app.OnUsageError = c.OnUsageError
+
+	for index, cc := range app.Commands {
+		app.Commands[index].commandNamePath = []string{c.Name, cc.Name}
+	}
+
+	return app.RunAsSubcommand(ctx)
+}
+
+// VisibleFlags returns a slice of the Flags with Hidden=false
+func (c *Command) VisibleFlags() []Flag {
+	return visibleFlags(c.Flags)
+}
+
+func (c *Command) appendFlag(fl Flag) {
+	if !hasFlag(c.Flags, fl) {
+		c.Flags = append(c.Flags, fl)
+	}
+}
+
+func hasCommand(commands []*Command, command *Command) bool {
+	for _, existing := range commands {
+		if command == existing {
+			return true
+		}
+	}
+
+	return false
+}

vendor/github.com/urfave/cli/v2/context.go

@@ -0,0 +1,274 @@
+package cli
+
+import (
+	"context"
+	"errors"
+	"flag"
+	"fmt"
+	"strings"
+)
+
+// Context is a type that is passed through to
+// each Handler action in a cli application. Context
+// can be used to retrieve context-specific args and
+// parsed command-line options.
+type Context struct {
+	context.Context
+	App           *App
+	Command       *Command
+	shellComplete bool
+	setFlags      map[string]bool
+	flagSet       *flag.FlagSet
+	parentContext *Context
+}
+
+// NewContext creates a new context. For use in when invoking an App or Command action.
+func NewContext(app *App, set *flag.FlagSet, parentCtx *Context) *Context {
+	c := &Context{App: app, flagSet: set, parentContext: parentCtx}
+	if parentCtx != nil {
+		c.Context = parentCtx.Context
+		c.shellComplete = parentCtx.shellComplete
+		if parentCtx.flagSet == nil {
+			parentCtx.flagSet = &flag.FlagSet{}
+		}
+	}
+
+	c.Command = &Command{}
+
+	if c.Context == nil {
+		c.Context = context.Background()
+	}
+
+	return c
+}
+
+// NumFlags returns the number of flags set
+func (c *Context) NumFlags() int {
+	return c.flagSet.NFlag()
+}
+
+// Set sets a context flag to a value.
+func (c *Context) Set(name, value string) error {
+	return c.flagSet.Set(name, value)
+}
+
+// IsSet determines if the flag was actually set
+func (c *Context) IsSet(name string) bool {
+	if fs := lookupFlagSet(name, c); fs != nil {
+		if fs := lookupFlagSet(name, c); fs != nil {
+			isSet := false
+			fs.Visit(func(f *flag.Flag) {
+				if f.Name == name {
+					isSet = true
+				}
+			})
+			if isSet {
+				return true
+			}
+		}
+
+		f := lookupFlag(name, c)
+		if f == nil {
+			return false
+		}
+
+		return f.IsSet()
+	}
+
+	return false
+}
+
+// LocalFlagNames returns a slice of flag names used in this context.
+func (c *Context) LocalFlagNames() []string {
+	var names []string
+	c.flagSet.Visit(makeFlagNameVisitor(&names))
+	return names
+}
+
+// FlagNames returns a slice of flag names used by the this context and all of
+// its parent contexts.
+func (c *Context) FlagNames() []string {
+	var names []string
+	for _, ctx := range c.Lineage() {
+		ctx.flagSet.Visit(makeFlagNameVisitor(&names))
+	}
+	return names
+}
+
+// Lineage returns *this* context and all of its ancestor contexts in order from
+// child to parent
+func (c *Context) Lineage() []*Context {
+	var lineage []*Context
+
+	for cur := c; cur != nil; cur = cur.parentContext {
+		lineage = append(lineage, cur)
+	}
+
+	return lineage
+}
+
+// Value returns the value of the flag corresponding to `name`
+func (c *Context) Value(name string) interface{} {
+	return c.flagSet.Lookup(name).Value.(flag.Getter).Get()
+}
+
+// Args returns the command line arguments associated with the context.
+func (c *Context) Args() Args {
+	ret := args(c.flagSet.Args())
+	return &ret
+}
+
+// NArg returns the number of the command line arguments.
+func (c *Context) NArg() int {
+	return c.Args().Len()
+}
+
+func lookupFlag(name string, ctx *Context) Flag {
+	for _, c := range ctx.Lineage() {
+		if c.Command == nil {
+			continue
+		}
+
+		for _, f := range c.Command.Flags {
+			for _, n := range f.Names() {
+				if n == name {
+					return f
+				}
+			}
+		}
+	}
+
+	if ctx.App != nil {
+		for _, f := range ctx.App.Flags {
+			for _, n := range f.Names() {
+				if n == name {
+					return f
+				}
+			}
+		}
+	}
+
+	return nil
+}
+
+func lookupFlagSet(name string, ctx *Context) *flag.FlagSet {
+	for _, c := range ctx.Lineage() {
+		if f := c.flagSet.Lookup(name); f != nil {
+			return c.flagSet
+		}
+	}
+
+	return nil
+}
+
+func copyFlag(name string, ff *flag.Flag, set *flag.FlagSet) {
+	switch ff.Value.(type) {
+	case Serializer:
+		_ = set.Set(name, ff.Value.(Serializer).Serialize())
+	default:
+		_ = set.Set(name, ff.Value.String())
+	}
+}
+
+func normalizeFlags(flags []Flag, set *flag.FlagSet) error {
+	visited := make(map[string]bool)
+	set.Visit(func(f *flag.Flag) {
+		visited[f.Name] = true
+	})
+	for _, f := range flags {
+		parts := f.Names()
+		if len(parts) == 1 {
+			continue
+		}
+		var ff *flag.Flag
+		for _, name := range parts {
+			name = strings.Trim(name, " ")
+			if visited[name] {
+				if ff != nil {
+					return errors.New("Cannot use two forms of the same flag: " + name + " " + ff.Name)
+				}
+				ff = set.Lookup(name)
+			}
+		}
+		if ff == nil {
+			continue
+		}
+		for _, name := range parts {
+			name = strings.Trim(name, " ")
+			if !visited[name] {
+				copyFlag(name, ff, set)
+			}
+		}
+	}
+	return nil
+}
+
+func makeFlagNameVisitor(names *[]string) func(*flag.Flag) {
+	return func(f *flag.Flag) {
+		nameParts := strings.Split(f.Name, ",")
+		name := strings.TrimSpace(nameParts[0])
+
+		for _, part := range nameParts {
+			part = strings.TrimSpace(part)
+			if len(part) > len(name) {
+				name = part
+			}
+		}
+
+		if name != "" {
+			*names = append(*names, name)
+		}
+	}
+}
+
+type requiredFlagsErr interface {
+	error
+	getMissingFlags() []string
+}
+
+type errRequiredFlags struct {
+	missingFlags []string
+}
+
+func (e *errRequiredFlags) Error() string {
+	numberOfMissingFlags := len(e.missingFlags)
+	if numberOfMissingFlags == 1 {
+		return fmt.Sprintf("Required flag %q not set", e.missingFlags[0])
+	}
+	joinedMissingFlags := strings.Join(e.missingFlags, ", ")
+	return fmt.Sprintf("Required flags %q not set", joinedMissingFlags)
+}
+
+func (e *errRequiredFlags) getMissingFlags() []string {
+	return e.missingFlags
+}
+
+func checkRequiredFlags(flags []Flag, context *Context) requiredFlagsErr {
+	var missingFlags []string
+	for _, f := range flags {
+		if rf, ok := f.(RequiredFlag); ok && rf.IsRequired() {
+			var flagPresent bool
+			var flagName string
+
+			for _, key := range f.Names() {
+				if len(key) > 1 {
+					flagName = key
+				}
+
+				if context.IsSet(strings.TrimSpace(key)) {
+					flagPresent = true
+				}
+			}
+
+			if !flagPresent && flagName != "" {
+				missingFlags = append(missingFlags, flagName)
+			}
+		}
+	}
+
+	if len(missingFlags) != 0 {
+		return &errRequiredFlags{missingFlags: missingFlags}
+	}
+
+	return nil
+}

vendor/github.com/urfave/cli/v2/docs.go

@@ -0,0 +1,148 @@
+package cli
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"sort"
+	"strings"
+	"text/template"
+
+	"github.com/cpuguy83/go-md2man/v2/md2man"
+)
+
+// ToMarkdown creates a markdown string for the `*App`
+// The function errors if either parsing or writing of the string fails.
+func (a *App) ToMarkdown() (string, error) {
+	var w bytes.Buffer
+	if err := a.writeDocTemplate(&w); err != nil {
+		return "", err
+	}
+	return w.String(), nil
+}
+
+// ToMan creates a man page string for the `*App`
+// The function errors if either parsing or writing of the string fails.
+func (a *App) ToMan() (string, error) {
+	var w bytes.Buffer
+	if err := a.writeDocTemplate(&w); err != nil {
+		return "", err
+	}
+	man := md2man.Render(w.Bytes())
+	return string(man), nil
+}
+
+type cliTemplate struct {
+	App          *App
+	Commands     []string
+	GlobalArgs   []string
+	SynopsisArgs []string
+}
+
+func (a *App) writeDocTemplate(w io.Writer) error {
+	const name = "cli"
+	t, err := template.New(name).Parse(MarkdownDocTemplate)
+	if err != nil {
+		return err
+	}
+	return t.ExecuteTemplate(w, name, &cliTemplate{
+		App:          a,
+		Commands:     prepareCommands(a.Commands, 0),
+		GlobalArgs:   prepareArgsWithValues(a.VisibleFlags()),
+		SynopsisArgs: prepareArgsSynopsis(a.VisibleFlags()),
+	})
+}
+
+func prepareCommands(commands []*Command, level int) []string {
+	var coms []string
+	for _, command := range commands {
+		if command.Hidden {
+			continue
+		}
+		usage := ""
+		if command.Usage != "" {
+			usage = command.Usage
+		}
+
+		prepared := fmt.Sprintf("%s %s\n\n%s\n",
+			strings.Repeat("#", level+2),
+			strings.Join(command.Names(), ", "),
+			usage,
+		)
+
+		flags := prepareArgsWithValues(command.Flags)
+		if len(flags) > 0 {
+			prepared += fmt.Sprintf("\n%s", strings.Join(flags, "\n"))
+		}
+
+		coms = append(coms, prepared)
+
+		// recursevly iterate subcommands
+		if len(command.Subcommands) > 0 {
+			coms = append(
+				coms,
+				prepareCommands(command.Subcommands, level+1)...,
+			)
+		}
+	}
+
+	return coms
+}
+
+func prepareArgsWithValues(flags []Flag) []string {
+	return prepareFlags(flags, ", ", "**", "**", `""`, true)
+}
+
+func prepareArgsSynopsis(flags []Flag) []string {
+	return prepareFlags(flags, "|", "[", "]", "[value]", false)
+}
+
+func prepareFlags(
+	flags []Flag,
+	sep, opener, closer, value string,
+	addDetails bool,
+) []string {
+	args := []string{}
+	for _, f := range flags {
+		flag, ok := f.(DocGenerationFlag)
+		if !ok {
+			continue
+		}
+		modifiedArg := opener
+
+		for _, s := range flag.Names() {
+			trimmed := strings.TrimSpace(s)
+			if len(modifiedArg) > len(opener) {
+				modifiedArg += sep
+			}
+			if len(trimmed) > 1 {
+				modifiedArg += fmt.Sprintf("--%s", trimmed)
+			} else {
+				modifiedArg += fmt.Sprintf("-%s", trimmed)
+			}
+		}
+		modifiedArg += closer
+		if flag.TakesValue() {
+			modifiedArg += fmt.Sprintf("=%s", value)
+		}
+
+		if addDetails {
+			modifiedArg += flagDetails(flag)
+		}
+
+		args = append(args, modifiedArg+"\n")
+
+	}
+	sort.Strings(args)
+	return args
+}
+
+// flagDetails returns a string containing the flags metadata
+func flagDetails(flag DocGenerationFlag) string {
+	description := flag.GetUsage()
+	value := flag.GetValue()
+	if value != "" {
+		description += " (default: " + value + ")"
+	}
+	return ": " + description
+}

vendor/github.com/urfave/cli/v2/errors.go

@@ -0,0 +1,131 @@
+package cli
+
+import (
+	"fmt"
+	"io"
+	"os"
+	"strings"
+)
+
+// OsExiter is the function used when the app exits. If not set defaults to os.Exit.
+var OsExiter = os.Exit
+
+// ErrWriter is used to write errors to the user. This can be anything
+// implementing the io.Writer interface and defaults to os.Stderr.
+var ErrWriter io.Writer = os.Stderr
+
+// MultiError is an error that wraps multiple errors.
+type MultiError interface {
+	error
+	// Errors returns a copy of the errors slice
+	Errors() []error
+}
+
+// NewMultiError creates a new MultiError. Pass in one or more errors.
+func newMultiError(err ...error) MultiError {
+	ret := multiError(err)
+	return &ret
+}
+
+type multiError []error
+
+// Error implements the error interface.
+func (m *multiError) Error() string {
+	errs := make([]string, len(*m))
+	for i, err := range *m {
+		errs[i] = err.Error()
+	}
+
+	return strings.Join(errs, "\n")
+}
+
+// Errors returns a copy of the errors slice
+func (m *multiError) Errors() []error {
+	errs := make([]error, len(*m))
+	for _, err := range *m {
+		errs = append(errs, err)
+	}
+	return errs
+}
+
+// ErrorFormatter is the interface that will suitably format the error output
+type ErrorFormatter interface {
+	Format(s fmt.State, verb rune)
+}
+
+// ExitCoder is the interface checked by `App` and `Command` for a custom exit
+// code
+type ExitCoder interface {
+	error
+	ExitCode() int
+}
+
+type exitError struct {
+	exitCode int
+	message  interface{}
+}
+
+// NewExitError makes a new *exitError
+func NewExitError(message interface{}, exitCode int) ExitCoder {
+	return Exit(message, exitCode)
+}
+
+// Exit wraps a message and exit code into an ExitCoder suitable for handling by
+// HandleExitCoder
+func Exit(message interface{}, exitCode int) ExitCoder {
+	return &exitError{
+		message:  message,
+		exitCode: exitCode,
+	}
+}
+
+func (ee *exitError) Error() string {
+	return fmt.Sprintf("%v", ee.message)
+}
+
+func (ee *exitError) ExitCode() int {
+	return ee.exitCode
+}
+
+// HandleExitCoder checks if the error fulfills the ExitCoder interface, and if
+// so prints the error to stderr (if it is non-empty) and calls OsExiter with the
+// given exit code.  If the given error is a MultiError, then this func is
+// called on all members of the Errors slice and calls OsExiter with the last exit code.
+func HandleExitCoder(err error) {
+	if err == nil {
+		return
+	}
+
+	if exitErr, ok := err.(ExitCoder); ok {
+		if err.Error() != "" {
+			if _, ok := exitErr.(ErrorFormatter); ok {
+				_, _ = fmt.Fprintf(ErrWriter, "%+v\n", err)
+			} else {
+				_, _ = fmt.Fprintln(ErrWriter, err)
+			}
+		}
+		OsExiter(exitErr.ExitCode())
+		return
+	}
+
+	if multiErr, ok := err.(MultiError); ok {
+		code := handleMultiError(multiErr)
+		OsExiter(code)
+		return
+	}
+}
+
+func handleMultiError(multiErr MultiError) int {
+	code := 1
+	for _, merr := range multiErr.Errors() {
+		if multiErr2, ok := merr.(MultiError); ok {
+			code = handleMultiError(multiErr2)
+		} else if merr != nil {
+			fmt.Fprintln(ErrWriter, merr)
+			if exitErr, ok := merr.(ExitCoder); ok {
+				code = exitErr.ExitCode()
+			}
+		}
+	}
+	return code
+}

vendor/github.com/urfave/cli/v2/fish.go

@@ -0,0 +1,192 @@
+package cli
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"strings"
+	"text/template"
+)
+
+// ToFishCompletion creates a fish completion string for the `*App`
+// The function errors if either parsing or writing of the string fails.
+func (a *App) ToFishCompletion() (string, error) {
+	var w bytes.Buffer
+	if err := a.writeFishCompletionTemplate(&w); err != nil {
+		return "", err
+	}
+	return w.String(), nil
+}
+
+type fishCompletionTemplate struct {
+	App         *App
+	Completions []string
+	AllCommands []string
+}
+
+func (a *App) writeFishCompletionTemplate(w io.Writer) error {
+	const name = "cli"
+	t, err := template.New(name).Parse(FishCompletionTemplate)
+	if err != nil {
+		return err
+	}
+	allCommands := []string{}
+
+	// Add global flags
+	completions := a.prepareFishFlags(a.VisibleFlags(), allCommands)
+
+	// Add help flag
+	if !a.HideHelp {
+		completions = append(
+			completions,
+			a.prepareFishFlags([]Flag{HelpFlag}, allCommands)...,
+		)
+	}
+
+	// Add version flag
+	if !a.HideVersion {
+		completions = append(
+			completions,
+			a.prepareFishFlags([]Flag{VersionFlag}, allCommands)...,
+		)
+	}
+
+	// Add commands and their flags
+	completions = append(
+		completions,
+		a.prepareFishCommands(a.VisibleCommands(), &allCommands, []string{})...,
+	)
+
+	return t.ExecuteTemplate(w, name, &fishCompletionTemplate{
+		App:         a,
+		Completions: completions,
+		AllCommands: allCommands,
+	})
+}
+
+func (a *App) prepareFishCommands(commands []*Command, allCommands *[]string, previousCommands []string) []string {
+	completions := []string{}
+	for _, command := range commands {
+		if command.Hidden {
+			continue
+		}
+
+		var completion strings.Builder
+		completion.WriteString(fmt.Sprintf(
+			"complete -r -c %s -n '%s' -a '%s'",
+			a.Name,
+			a.fishSubcommandHelper(previousCommands),
+			strings.Join(command.Names(), " "),
+		))
+
+		if command.Usage != "" {
+			completion.WriteString(fmt.Sprintf(" -d '%s'",
+				escapeSingleQuotes(command.Usage)))
+		}
+
+		if !command.HideHelp {
+			completions = append(
+				completions,
+				a.prepareFishFlags([]Flag{HelpFlag}, command.Names())...,
+			)
+		}
+
+		*allCommands = append(*allCommands, command.Names()...)
+		completions = append(completions, completion.String())
+		completions = append(
+			completions,
+			a.prepareFishFlags(command.Flags, command.Names())...,
+		)
+
+		// recursevly iterate subcommands
+		if len(command.Subcommands) > 0 {
+			completions = append(
+				completions,
+				a.prepareFishCommands(
+					command.Subcommands, allCommands, command.Names(),
+				)...,
+			)
+		}
+	}
+
+	return completions
+}
+
+func (a *App) prepareFishFlags(flags []Flag, previousCommands []string) []string {
+	completions := []string{}
+	for _, f := range flags {
+		flag, ok := f.(DocGenerationFlag)
+		if !ok {
+			continue
+		}
+
+		completion := &strings.Builder{}
+		completion.WriteString(fmt.Sprintf(
+			"complete -c %s -n '%s'",
+			a.Name,
+			a.fishSubcommandHelper(previousCommands),
+		))
+
+		fishAddFileFlag(f, completion)
+
+		for idx, opt := range flag.Names() {
+			if idx == 0 {
+				completion.WriteString(fmt.Sprintf(
+					" -l %s", strings.TrimSpace(opt),
+				))
+			} else {
+				completion.WriteString(fmt.Sprintf(
+					" -s %s", strings.TrimSpace(opt),
+				))
+
+			}
+		}
+
+		if flag.TakesValue() {
+			completion.WriteString(" -r")
+		}
+
+		if flag.GetUsage() != "" {
+			completion.WriteString(fmt.Sprintf(" -d '%s'",
+				escapeSingleQuotes(flag.GetUsage())))
+		}
+
+		completions = append(completions, completion.String())
+	}
+
+	return completions
+}
+
+func fishAddFileFlag(flag Flag, completion *strings.Builder) {
+	switch f := flag.(type) {
+	case *GenericFlag:
+		if f.TakesFile {
+			return
+		}
+	case *StringFlag:
+		if f.TakesFile {
+			return
+		}
+	case *StringSliceFlag:
+		if f.TakesFile {
+			return
+		}
+	}
+	completion.WriteString(" -f")
+}
+
+func (a *App) fishSubcommandHelper(allCommands []string) string {
+	fishHelper := fmt.Sprintf("__fish_%s_no_subcommand", a.Name)
+	if len(allCommands) > 0 {
+		fishHelper = fmt.Sprintf(
+			"__fish_seen_subcommand_from %s",
+			strings.Join(allCommands, " "),
+		)
+	}
+	return fishHelper
+
+}
+
+func escapeSingleQuotes(input string) string {
+	return strings.Replace(input, `'`, `\'`, -1)
+}

vendor/github.com/urfave/cli/v2/flag.go

@@ -0,0 +1,398 @@
+package cli
+
+import (
+	"flag"
+	"fmt"
+	"io/ioutil"
+	"reflect"
+	"regexp"
+	"runtime"
+	"strconv"
+	"strings"
+	"syscall"
+	"time"
+)
+
+const defaultPlaceholder = "value"
+
+var (
+	slPfx = fmt.Sprintf("sl:::%d:::", time.Now().UTC().UnixNano())
+
+	commaWhitespace = regexp.MustCompile("[, ]+.*")
+)
+
+// BashCompletionFlag enables bash-completion for all commands and subcommands
+var BashCompletionFlag Flag = &BoolFlag{
+	Name:   "generate-bash-completion",
+	Hidden: true,
+}
+
+// VersionFlag prints the version for the application
+var VersionFlag Flag = &BoolFlag{
+	Name:    "version",
+	Aliases: []string{"v"},
+	Usage:   "print the version",
+}
+
+// HelpFlag prints the help for all commands and subcommands.
+// Set to nil to disable the flag.  The subcommand
+// will still be added unless HideHelp is set to true.
+var HelpFlag Flag = &BoolFlag{
+	Name:    "help",
+	Aliases: []string{"h"},
+	Usage:   "show help",
+}
+
+// FlagStringer converts a flag definition to a string. This is used by help
+// to display a flag.
+var FlagStringer FlagStringFunc = stringifyFlag
+
+// Serializer is used to circumvent the limitations of flag.FlagSet.Set
+type Serializer interface {
+	Serialize() string
+}
+
+// FlagNamePrefixer converts a full flag name and its placeholder into the help
+// message flag prefix. This is used by the default FlagStringer.
+var FlagNamePrefixer FlagNamePrefixFunc = prefixedNames
+
+// FlagEnvHinter annotates flag help message with the environment variable
+// details. This is used by the default FlagStringer.
+var FlagEnvHinter FlagEnvHintFunc = withEnvHint
+
+// FlagFileHinter annotates flag help message with the environment variable
+// details. This is used by the default FlagStringer.
+var FlagFileHinter FlagFileHintFunc = withFileHint
+
+// FlagsByName is a slice of Flag.
+type FlagsByName []Flag
+
+func (f FlagsByName) Len() int {
+	return len(f)
+}
+
+func (f FlagsByName) Less(i, j int) bool {
+	if len(f[j].Names()) == 0 {
+		return false
+	} else if len(f[i].Names()) == 0 {
+		return true
+	}
+	return lexicographicLess(f[i].Names()[0], f[j].Names()[0])
+}
+
+func (f FlagsByName) Swap(i, j int) {
+	f[i], f[j] = f[j], f[i]
+}
+
+// Flag is a common interface related to parsing flags in cli.
+// For more advanced flag parsing techniques, it is recommended that
+// this interface be implemented.
+type Flag interface {
+	fmt.Stringer
+	// Apply Flag settings to the given flag set
+	Apply(*flag.FlagSet) error
+	Names() []string
+	IsSet() bool
+}
+
+// RequiredFlag is an interface that allows us to mark flags as required
+// it allows flags required flags to be backwards compatible with the Flag interface
+type RequiredFlag interface {
+	Flag
+
+	IsRequired() bool
+}
+
+// DocGenerationFlag is an interface that allows documentation generation for the flag
+type DocGenerationFlag interface {
+	Flag
+
+	// TakesValue returns true if the flag takes a value, otherwise false
+	TakesValue() bool
+
+	// GetUsage returns the usage string for the flag
+	GetUsage() string
+
+	// GetValue returns the flags value as string representation and an empty
+	// string if the flag takes no value at all.
+	GetValue() string
+}
+
+func flagSet(name string, flags []Flag) (*flag.FlagSet, error) {
+	set := flag.NewFlagSet(name, flag.ContinueOnError)
+
+	for _, f := range flags {
+		if err := f.Apply(set); err != nil {
+			return nil, err
+		}
+	}
+	set.SetOutput(ioutil.Discard)
+	return set, nil
+}
+
+func visibleFlags(fl []Flag) []Flag {
+	var visible []Flag
+	for _, f := range fl {
+		field := flagValue(f).FieldByName("Hidden")
+		if !field.IsValid() || !field.Bool() {
+			visible = append(visible, f)
+		}
+	}
+	return visible
+}
+
+func prefixFor(name string) (prefix string) {
+	if len(name) == 1 {
+		prefix = "-"
+	} else {
+		prefix = "--"
+	}
+
+	return
+}
+
+// Returns the placeholder, if any, and the unquoted usage string.
+func unquoteUsage(usage string) (string, string) {
+	for i := 0; i < len(usage); i++ {
+		if usage[i] == '`' {
+			for j := i + 1; j < len(usage); j++ {
+				if usage[j] == '`' {
+					name := usage[i+1 : j]
+					usage = usage[:i] + name + usage[j+1:]
+					return name, usage
+				}
+			}
+			break
+		}
+	}
+	return "", usage
+}
+
+func prefixedNames(names []string, placeholder string) string {
+	var prefixed string
+	for i, name := range names {
+		if name == "" {
+			continue
+		}
+
+		prefixed += prefixFor(name) + name
+		if placeholder != "" {
+			prefixed += " " + placeholder
+		}
+		if i < len(names)-1 {
+			prefixed += ", "
+		}
+	}
+	return prefixed
+}
+
+func withEnvHint(envVars []string, str string) string {
+	envText := ""
+	if envVars != nil && len(envVars) > 0 {
+		prefix := "$"
+		suffix := ""
+		sep := ", $"
+		if runtime.GOOS == "windows" {
+			prefix = "%"
+			suffix = "%"
+			sep = "%, %"
+		}
+
+		envText = fmt.Sprintf(" [%s%s%s]", prefix, strings.Join(envVars, sep), suffix)
+	}
+	return str + envText
+}
+
+func flagNames(f Flag) []string {
+	var ret []string
+
+	name := flagStringField(f, "Name")
+	aliases := flagStringSliceField(f, "Aliases")
+
+	for _, part := range append([]string{name}, aliases...) {
+		// v1 -> v2 migration warning zone:
+		// Strip off anything after the first found comma or space, which
+		// *hopefully* makes it a tiny bit more obvious that unexpected behavior is
+		// caused by using the v1 form of stringly typed "Name".
+		ret = append(ret, commaWhitespace.ReplaceAllString(part, ""))
+	}
+
+	return ret
+}
+
+func flagStringSliceField(f Flag, name string) []string {
+	fv := flagValue(f)
+	field := fv.FieldByName(name)
+
+	if field.IsValid() {
+		return field.Interface().([]string)
+	}
+
+	return []string{}
+}
+
+func flagStringField(f Flag, name string) string {
+	fv := flagValue(f)
+	field := fv.FieldByName(name)
+
+	if field.IsValid() {
+		return field.String()
+	}
+
+	return ""
+}
+
+func withFileHint(filePath, str string) string {
+	fileText := ""
+	if filePath != "" {
+		fileText = fmt.Sprintf(" [%s]", filePath)
+	}
+	return str + fileText
+}
+
+func flagValue(f Flag) reflect.Value {
+	fv := reflect.ValueOf(f)
+	for fv.Kind() == reflect.Ptr {
+		fv = reflect.Indirect(fv)
+	}
+	return fv
+}
+
+func stringifyFlag(f Flag) string {
+	fv := flagValue(f)
+
+	switch f.(type) {
+	case *IntSliceFlag:
+		return withEnvHint(flagStringSliceField(f, "EnvVars"),
+			stringifyIntSliceFlag(f.(*IntSliceFlag)))
+	case *Int64SliceFlag:
+		return withEnvHint(flagStringSliceField(f, "EnvVars"),
+			stringifyInt64SliceFlag(f.(*Int64SliceFlag)))
+	case *Float64SliceFlag:
+		return withEnvHint(flagStringSliceField(f, "EnvVars"),
+			stringifyFloat64SliceFlag(f.(*Float64SliceFlag)))
+	case *StringSliceFlag:
+		return withEnvHint(flagStringSliceField(f, "EnvVars"),
+			stringifyStringSliceFlag(f.(*StringSliceFlag)))
+	}
+
+	placeholder, usage := unquoteUsage(fv.FieldByName("Usage").String())
+
+	needsPlaceholder := false
+	defaultValueString := ""
+	val := fv.FieldByName("Value")
+	if val.IsValid() {
+		needsPlaceholder = val.Kind() != reflect.Bool
+		defaultValueString = fmt.Sprintf(" (default: %v)", val.Interface())
+
+		if val.Kind() == reflect.String && val.String() != "" {
+			defaultValueString = fmt.Sprintf(" (default: %q)", val.String())
+		}
+	}
+
+	helpText := fv.FieldByName("DefaultText")
+	if helpText.IsValid() && helpText.String() != "" {
+		needsPlaceholder = val.Kind() != reflect.Bool
+		defaultValueString = fmt.Sprintf(" (default: %s)", helpText.String())
+	}
+
+	if defaultValueString == " (default: )" {
+		defaultValueString = ""
+	}
+
+	if needsPlaceholder && placeholder == "" {
+		placeholder = defaultPlaceholder
+	}
+
+	usageWithDefault := strings.TrimSpace(usage + defaultValueString)
+
+	return withEnvHint(flagStringSliceField(f, "EnvVars"),
+		fmt.Sprintf("%s\t%s", prefixedNames(f.Names(), placeholder), usageWithDefault))
+}
+
+func stringifyIntSliceFlag(f *IntSliceFlag) string {
+	var defaultVals []string
+	if f.Value != nil && len(f.Value.Value()) > 0 {
+		for _, i := range f.Value.Value() {
+			defaultVals = append(defaultVals, strconv.Itoa(i))
+		}
+	}
+
+	return stringifySliceFlag(f.Usage, f.Names(), defaultVals)
+}
+
+func stringifyInt64SliceFlag(f *Int64SliceFlag) string {
+	var defaultVals []string
+	if f.Value != nil && len(f.Value.Value()) > 0 {
+		for _, i := range f.Value.Value() {
+			defaultVals = append(defaultVals, strconv.FormatInt(i, 10))
+		}
+	}
+
+	return stringifySliceFlag(f.Usage, f.Names(), defaultVals)
+}
+
+func stringifyFloat64SliceFlag(f *Float64SliceFlag) string {
+	var defaultVals []string
+
+	if f.Value != nil && len(f.Value.Value()) > 0 {
+		for _, i := range f.Value.Value() {
+			defaultVals = append(defaultVals, strings.TrimRight(strings.TrimRight(fmt.Sprintf("%f", i), "0"), "."))
+		}
+	}
+
+	return stringifySliceFlag(f.Usage, f.Names(), defaultVals)
+}
+
+func stringifyStringSliceFlag(f *StringSliceFlag) string {
+	var defaultVals []string
+	if f.Value != nil && len(f.Value.Value()) > 0 {
+		for _, s := range f.Value.Value() {
+			if len(s) > 0 {
+				defaultVals = append(defaultVals, strconv.Quote(s))
+			}
+		}
+	}
+
+	return stringifySliceFlag(f.Usage, f.Names(), defaultVals)
+}
+
+func stringifySliceFlag(usage string, names, defaultVals []string) string {
+	placeholder, usage := unquoteUsage(usage)
+	if placeholder == "" {
+		placeholder = defaultPlaceholder
+	}
+
+	defaultVal := ""
+	if len(defaultVals) > 0 {
+		defaultVal = fmt.Sprintf(" (default: %s)", strings.Join(defaultVals, ", "))
+	}
+
+	usageWithDefault := strings.TrimSpace(fmt.Sprintf("%s%s", usage, defaultVal))
+	return fmt.Sprintf("%s\t%s", prefixedNames(names, placeholder), usageWithDefault)
+}
+
+func hasFlag(flags []Flag, fl Flag) bool {
+	for _, existing := range flags {
+		if fl == existing {
+			return true
+		}
+	}
+
+	return false
+}
+
+func flagFromEnvOrFile(envVars []string, filePath string) (val string, ok bool) {
+	for _, envVar := range envVars {
+		envVar = strings.TrimSpace(envVar)
+		if val, ok := syscall.Getenv(envVar); ok {
+			return val, true
+		}
+	}
+	for _, fileVar := range strings.Split(filePath, ",") {
+		if data, err := ioutil.ReadFile(fileVar); err == nil {
+			return string(data), true
+		}
+	}
+	return "", false
+}

vendor/github.com/urfave/cli/v2/flag_bool.go

@@ -0,0 +1,106 @@
+package cli
+
+import (
+	"flag"
+	"fmt"
+	"strconv"
+)
+
+// BoolFlag is a flag with type bool
+type BoolFlag struct {
+	Name        string
+	Aliases     []string
+	Usage       string
+	EnvVars     []string
+	FilePath    string
+	Required    bool
+	Hidden      bool
+	Value       bool
+	DefaultText string
+	Destination *bool
+	HasBeenSet  bool
+}
+
+// IsSet returns whether or not the flag has been set through env or file
+func (f *BoolFlag) IsSet() bool {
+	return f.HasBeenSet
+}
+
+// String returns a readable representation of this value
+// (for usage defaults)
+func (f *BoolFlag) String() string {
+	return FlagStringer(f)
+}
+
+// Names returns the names of the flag
+func (f *BoolFlag) Names() []string {
+	return flagNames(f)
+}
+
+// IsRequired returns whether or not the flag is required
+func (f *BoolFlag) IsRequired() bool {
+	return f.Required
+}
+
+// TakesValue returns true of the flag takes a value, otherwise false
+func (f *BoolFlag) TakesValue() bool {
+	return false
+}
+
+// GetUsage returns the usage string for the flag
+func (f *BoolFlag) GetUsage() string {
+	return f.Usage
+}
+
+// GetValue returns the flags value as string representation and an empty
+// string if the flag takes no value at all.
+func (f *BoolFlag) GetValue() string {
+	return ""
+}
+
+// Apply populates the flag given the flag set and environment
+func (f *BoolFlag) Apply(set *flag.FlagSet) error {
+	if val, ok := flagFromEnvOrFile(f.EnvVars, f.FilePath); ok {
+		if val != "" {
+			valBool, err := strconv.ParseBool(val)
+
+			if err != nil {
+				return fmt.Errorf("could not parse %q as bool value for flag %s: %s", val, f.Name, err)
+			}
+
+			f.Value = valBool
+			f.HasBeenSet = true
+		}
+	}
+
+	for _, name := range f.Names() {
+		if f.Destination != nil {
+			set.BoolVar(f.Destination, name, f.Value, f.Usage)
+			continue
+		}
+		set.Bool(name, f.Value, f.Usage)
+	}
+
+	return nil
+}
+
+// Bool looks up the value of a local BoolFlag, returns
+// false if not found
+func (c *Context) Bool(name string) bool {
+	if fs := lookupFlagSet(name, c); fs != nil {
+		return lookupBool(name, fs)
+	}
+	return false
+}
+
+func lookupBool(name string, set *flag.FlagSet) bool {
+	f := set.Lookup(name)
+	if f != nil {
+		parsed, err := strconv.ParseBool(f.Value.String())
+		if err != nil {
+			return false
+		}
+		return parsed
+	}
+	return false
+}

vendor/github.com/urfave/cli/v2/flag_duration.go

@@ -0,0 +1,105 @@
+package cli
+
+import (
+	"flag"
+	"fmt"
+	"time"
+)
+
+// DurationFlag is a flag with type time.Duration (see https://golang.org/pkg/time/#ParseDuration)
+type DurationFlag struct {
+	Name        string
+	Aliases     []string
+	Usage       string
+	EnvVars     []string
+	FilePath    string
+	Required    bool
+	Hidden      bool
+	Value       time.Duration
+	DefaultText string
+	Destination *time.Duration
+	HasBeenSet  bool
+}
+
+// IsSet returns whether or not the flag has been set through env or file
+func (f *DurationFlag) IsSet() bool {
+	return f.HasBeenSet
+}
+
+// String returns a readable representation of this value
+// (for usage defaults)
+func (f *DurationFlag) String() string {
+	return FlagStringer(f)
+}
+
+// Names returns the names of the flag
+func (f *DurationFlag) Names() []string {
+	return flagNames(f)
+}
+
+// IsRequired returns whether or not the flag is required
+func (f *DurationFlag) IsRequired() bool {
+	return f.Required
+}
+
+// TakesValue returns true of the flag takes a value, otherwise false
+func (f *DurationFlag) TakesValue() bool {
+	return true
+}
+
+// GetUsage returns the usage string for the flag
+func (f *DurationFlag) GetUsage() string {
+	return f.Usage
+}
+
+// GetValue returns the flags value as string representation and an empty
+// string if the flag takes no value at all.
+func (f *DurationFlag) GetValue() string {
+	return f.Value.String()
+}
+
+// Apply populates the flag given the flag set and environment
+func (f *DurationFlag) Apply(set *flag.FlagSet) error {
+	if val, ok := flagFromEnvOrFile(f.EnvVars, f.FilePath); ok {
+		if val != "" {
+			valDuration, err := time.ParseDuration(val)
+
+			if err != nil {
+				return fmt.Errorf("could not parse %q as duration value for flag %s: %s", val, f.Name, err)
+			}
+
+			f.Value = valDuration
+			f.HasBeenSet = true
+		}
+	}
+
+	for _, name := range f.Names() {
+		if f.Destination != nil {
+			set.DurationVar(f.Destination, name, f.Value, f.Usage)
+			continue
+		}
+		set.Duration(name, f.Value, f.Usage)
+	}
+	return nil
+}
+
+// Duration looks up the value of a local DurationFlag, returns
+// 0 if not found
+func (c *Context) Duration(name string) time.Duration {
+	if fs := lookupFlagSet(name, c); fs != nil {
+		return lookupDuration(name, fs)
+	}
+	return 0
+}
+
+func lookupDuration(name string, set *flag.FlagSet) time.Duration {
+	f := set.Lookup(name)
+	if f != nil {
+		parsed, err := time.ParseDuration(f.Value.String())
+		if err != nil {
+			return 0
+		}
+		return parsed
+	}
+	return 0
+}

vendor/github.com/urfave/cli/v2/flag_float64.go

@@ -0,0 +1,106 @@
+package cli
+
+import (
+	"flag"
+	"fmt"
+	"strconv"
+)
+
+// Float64Flag is a flag with type float64
+type Float64Flag struct {
+	Name        string
+	Aliases     []string
+	Usage       string
+	EnvVars     []string
+	FilePath    string
+	Required    bool
+	Hidden      bool
+	Value       float64
+	DefaultText string
+	Destination *float64
+	HasBeenSet  bool
+}
+
+// IsSet returns whether or not the flag has been set through env or file
+func (f *Float64Flag) IsSet() bool {
+	return f.HasBeenSet
+}
+
+// String returns a readable representation of this value
+// (for usage defaults)
+func (f *Float64Flag) String() string {
+	return FlagStringer(f)
+}
+
+// Names returns the names of the flag
+func (f *Float64Flag) Names() []string {
+	return flagNames(f)
+}
+
+// IsRequired returns whether or not the flag is required
+func (f *Float64Flag) IsRequired() bool {
+	return f.Required
+}
+
+// TakesValue returns true of the flag takes a value, otherwise false
+func (f *Float64Flag) TakesValue() bool {
+	return true
+}
+
+// GetUsage returns the usage string for the flag
+func (f *Float64Flag) GetUsage() string {
+	return f.Usage
+}
+
+// GetValue returns the flags value as string representation and an empty
+// string if the flag takes no value at all.
+func (f *Float64Flag) GetValue() string {
+	return fmt.Sprintf("%f", f.Value)
+}
+
+// Apply populates the flag given the flag set and environment
+func (f *Float64Flag) Apply(set *flag.FlagSet) error {
+	if val, ok := flagFromEnvOrFile(f.EnvVars, f.FilePath); ok {
+		if val != "" {
+			valFloat, err := strconv.ParseFloat(val, 10)
+
+			if err != nil {
+				return fmt.Errorf("could not parse %q as float64 value for flag %s: %s", val, f.Name, err)
+			}
+
+			f.Value = valFloat
+			f.HasBeenSet = true
+		}
+	}
+
+	for _, name := range f.Names() {
+		if f.Destination != nil {
+			set.Float64Var(f.Destination, name, f.Value, f.Usage)
+			continue
+		}
+		set.Float64(name, f.Value, f.Usage)
+	}
+
+	return nil
+}
+
+// Float64 looks up the value of a local Float64Flag, returns
+// 0 if not found
+func (c *Context) Float64(name string) float64 {
+	if fs := lookupFlagSet(name, c); fs != nil {
+		return lookupFloat64(name, fs)
+	}
+	return 0
+}
+
+func lookupFloat64(name string, set *flag.FlagSet) float64 {
+	f := set.Lookup(name)
+	if f != nil {
+		parsed, err := strconv.ParseFloat(f.Value.String(), 64)
+		if err != nil {
+			return 0
+		}
+		return parsed
+	}
+	return 0
+}

vendor/github.com/urfave/cli/v2/flag_float64_slice.go

@@ -0,0 +1,165 @@
+package cli
+
+import (
+	"encoding/json"
+	"flag"
+	"fmt"
+	"strconv"
+	"strings"
+)
+
+// Float64Slice wraps []float64 to satisfy flag.Value
+type Float64Slice struct {
+	slice      []float64
+	hasBeenSet bool
+}
+
+// NewFloat64Slice makes a *Float64Slice with default values
+func NewFloat64Slice(defaults ...float64) *Float64Slice {
+	return &Float64Slice{slice: append([]float64{}, defaults...)}
+}
+
+// Set parses the value into a float64 and appends it to the list of values
+func (f *Float64Slice) Set(value string) error {
+	if !f.hasBeenSet {
+		f.slice = []float64{}
+		f.hasBeenSet = true
+	}
+
+	if strings.HasPrefix(value, slPfx) {
+		// Deserializing assumes overwrite
+		_ = json.Unmarshal([]byte(strings.Replace(value, slPfx, "", 1)), &f.slice)
+		f.hasBeenSet = true
+		return nil
+	}
+
+	tmp, err := strconv.ParseFloat(value, 64)
+	if err != nil {
+		return err
+	}
+
+	f.slice = append(f.slice, tmp)
+	return nil
+}
+
+// String returns a readable representation of this value (for usage defaults)
+func (f *Float64Slice) String() string {
+	return fmt.Sprintf("%#v", f.slice)
+}
+
+// Serialize allows Float64Slice to fulfill Serializer
+func (f *Float64Slice) Serialize() string {
+	jsonBytes, _ := json.Marshal(f.slice)
+	return fmt.Sprintf("%s%s", slPfx, string(jsonBytes))
+}
+
+// Value returns the slice of float64s set by this flag
+func (f *Float64Slice) Value() []float64 {
+	return f.slice
+}
+
+// Get returns the slice of float64s set by this flag
+func (f *Float64Slice) Get() interface{} {
+	return *f
+}
+
+// Float64SliceFlag is a flag with type *Float64Slice
+type Float64SliceFlag struct {
+	Name        string
+	Aliases     []string
+	Usage       string
+	EnvVars     []string
+	FilePath    string
+	Required    bool
+	Hidden      bool
+	Value       *Float64Slice
+	DefaultText string
+	HasBeenSet  bool
+}
+
+// IsSet returns whether or not the flag has been set through env or file
+func (f *Float64SliceFlag) IsSet() bool {
+	return f.HasBeenSet
+}
+
+// String returns a readable representation of this value
+// (for usage defaults)
+func (f *Float64SliceFlag) String() string {
+	return FlagStringer(f)
+}
+
+// Names returns the names of the flag
+func (f *Float64SliceFlag) Names() []string {
+	return flagNames(f)
+}
+
+// IsRequired returns whether or not the flag is required
+func (f *Float64SliceFlag) IsRequired() bool {
+	return f.Required
+}
+
+// TakesValue returns true if the flag takes a value, otherwise false
+func (f *Float64SliceFlag) TakesValue() bool {
+	return true
+}
+
+// GetUsage returns the usage string for the flag
+func (f *Float64SliceFlag) GetUsage() string {
+	return f.Usage
+}
+
+// GetValue returns the flags value as string representation and an empty
+// string if the flag takes no value at all.
+func (f *Float64SliceFlag) GetValue() string {
+	if f.Value != nil {
+		return f.Value.String()
+	}
+	return ""
+}
+
+// Apply populates the flag given the flag set and environment
+func (f *Float64SliceFlag) Apply(set *flag.FlagSet) error {
+	if val, ok := flagFromEnvOrFile(f.EnvVars, f.FilePath); ok {
+		if val != "" {
+			f.Value = &Float64Slice{}
+
+			for _, s := range strings.Split(val, ",") {
+				if err := f.Value.Set(strings.TrimSpace(s)); err != nil {
+					return fmt.Errorf("could not parse %q as float64 slice value for flag %s: %s", f.Value, f.Name, err)
+				}
+			}
+
+			f.HasBeenSet = true
+		}
+	}
+
+	for _, name := range f.Names() {
+		if f.Value == nil {
+			f.Value = &Float64Slice{}
+		}
+		set.Var(f.Value, name, f.Usage)
+	}
+
+	return nil
+}
+
+// Float64Slice looks up the value of a local Float64SliceFlag, returns
+// nil if not found
+func (c *Context) Float64Slice(name string) []float64 {
+	if fs := lookupFlagSet(name, c); fs != nil {
+		return lookupFloat64Slice(name, fs)
+	}
+	return nil
+}
+
+func lookupFloat64Slice(name string, set *flag.FlagSet) []float64 {
+	f := set.Lookup(name)
+	if f != nil {
+		parsed, err := (f.Value.(*Float64Slice)).Value(), error(nil)
+		if err != nil {
+			return nil
+		}
+		return parsed
+	}
+	return nil
+}

vendor/github.com/urfave/cli/v2/flag_generic.go

@@ -0,0 +1,108 @@
+package cli
+
+import (
+	"flag"
+	"fmt"
+)
+
+// Generic is a generic parseable type identified by a specific flag
+type Generic interface {
+	Set(value string) error
+	String() string
+}
+
+// GenericFlag is a flag with type Generic
+type GenericFlag struct {
+	Name        string
+	Aliases     []string
+	Usage       string
+	EnvVars     []string
+	FilePath    string
+	Required    bool
+	Hidden      bool
+	TakesFile   bool
+	Value       Generic
+	DefaultText string
+	HasBeenSet  bool
+}
+
+// IsSet returns whether or not the flag has been set through env or file
+func (f *GenericFlag) IsSet() bool {
+	return f.HasBeenSet
+}
+
+// String returns a readable representation of this value
+// (for usage defaults)
+func (f *GenericFlag) String() string {
+	return FlagStringer(f)
+}
+
+// Names returns the names of the flag
+func (f *GenericFlag) Names() []string {
+	return flagNames(f)
+}
+
+// IsRequired returns whether or not the flag is required
+func (f *GenericFlag) IsRequired() bool {
+	return f.Required
+}
+
+// TakesValue returns true of the flag takes a value, otherwise false
+func (f *GenericFlag) TakesValue() bool {
+	return true
+}
+
+// GetUsage returns the usage string for the flag
+func (f *GenericFlag) GetUsage() string {
+	return f.Usage
+}
+
+// GetValue returns the flags value as string representation and an empty
+// string if the flag takes no value at all.
+func (f *GenericFlag) GetValue() string {
+	if f.Value != nil {
+		return f.Value.String()
+	}
+	return ""
+}
+
+// Apply takes the flagset and calls Set on the generic flag with the value
+// provided by the user for parsing by the flag
+func (f GenericFlag) Apply(set *flag.FlagSet) error {
+	if val, ok := flagFromEnvOrFile(f.EnvVars, f.FilePath); ok {
+		if val != "" {
+			if err := f.Value.Set(val); err != nil {
+				return fmt.Errorf("could not parse %q as value for flag %s: %s", val, f.Name, err)
+			}
+
+			f.HasBeenSet = true
+		}
+	}
+
+	for _, name := range f.Names() {
+		set.Var(f.Value, name, f.Usage)
+	}
+
+	return nil
+}
+
+// Generic looks up the value of a local GenericFlag, returns
+// nil if not found
+func (c *Context) Generic(name string) interface{} {
+	if fs := lookupFlagSet(name, c); fs != nil {
+		return lookupGeneric(name, fs)
+	}
+	return nil
+}
+
+func lookupGeneric(name string, set *flag.FlagSet) interface{} {
+	f := set.Lookup(name)
+	if f != nil {
+		parsed, err := f.Value, error(nil)
+		if err != nil {
+			return nil
+		}
+		return parsed
+	}
+	return nil
+}

vendor/github.com/urfave/cli/v2/flag_int.go

@@ -0,0 +1,106 @@
+package cli
+
+import (
+	"flag"
+	"fmt"
+	"strconv"
+)
+
+// IntFlag is a flag with type int
+type IntFlag struct {
+	Name        string
+	Aliases     []string
+	Usage       string
+	EnvVars     []string
+	FilePath    string
+	Required    bool
+	Hidden      bool
+	Value       int
+	DefaultText string
+	Destination *int
+	HasBeenSet  bool
+}
+
+// IsSet returns whether or not the flag has been set through env or file
+func (f *IntFlag) IsSet() bool {
+	return f.HasBeenSet
+}
+
+// String returns a readable representation of this value
+// (for usage defaults)
+func (f *IntFlag) String() string {
+	return FlagStringer(f)
+}
+
+// Names returns the names of the flag
+func (f *IntFlag) Names() []string {
+	return flagNames(f)
+}
+
+// IsRequired returns whether or not the flag is required
+func (f *IntFlag) IsRequired() bool {
+	return f.Required
+}
+
+// TakesValue returns true of the flag takes a value, otherwise false
+func (f *IntFlag) TakesValue() bool {
+	return true
+}
+
+// GetUsage returns the usage string for the flag
+func (f *IntFlag) GetUsage() string {
+	return f.Usage
+}
+
+// GetValue returns the flags value as string representation and an empty
+// string if the flag takes no value at all.
+func (f *IntFlag) GetValue() string {
+	return fmt.Sprintf("%d", f.Value)
+}
+
+// Apply populates the flag given the flag set and environment
+func (f *IntFlag) Apply(set *flag.FlagSet) error {
+	if val, ok := flagFromEnvOrFile(f.EnvVars, f.FilePath); ok {
+		if val != "" {
+			valInt, err := strconv.ParseInt(val, 0, 64)
+
+			if err != nil {
+				return fmt.Errorf("could not parse %q as int value for flag %s: %s", val, f.Name, err)
+			}
+
+			f.Value = int(valInt)
+			f.HasBeenSet = true
+		}
+	}
+
+	for _, name := range f.Names() {
+		if f.Destination != nil {
+			set.IntVar(f.Destination, name, f.Value, f.Usage)
+			continue
+		}
+		set.Int(name, f.Value, f.Usage)
+	}
+
+	return nil
+}
+
+// Int looks up the value of a local IntFlag, returns
+// 0 if not found
+func (c *Context) Int(name string) int {
+	if fs := lookupFlagSet(name, c); fs != nil {
+		return lookupInt(name, fs)
+	}
+	return 0
+}
+
+func lookupInt(name string, set *flag.FlagSet) int {
+	f := set.Lookup(name)
+	if f != nil {
+		parsed, err := strconv.ParseInt(f.Value.String(), 0, 64)
+		if err != nil {
+			return 0
+		}
+		return int(parsed)
+	}
+	return 0
+}

vendor/github.com/urfave/cli/v2/flag_int64.go

@@ -0,0 +1,105 @@
+package cli
+
+import (
+	"flag"
+	"fmt"
+	"strconv"
+)
+
+// Int64Flag is a flag with type int64
+type Int64Flag struct {
+	Name        string
+	Aliases     []string
+	Usage       string
+	EnvVars     []string
+	FilePath    string
+	Required    bool
+	Hidden      bool
+	Value       int64
+	DefaultText string
+	Destination *int64
+	HasBeenSet  bool
+}
+
+// IsSet returns whether or not the flag has been set through env or file
+func (f *Int64Flag) IsSet() bool {
+	return f.HasBeenSet
+}
+
+// String returns a readable representation of this value
+// (for usage defaults)
+func (f *Int64Flag) String() string {
+	return FlagStringer(f)
+}
+
+// Names returns the names of the flag
+func (f *Int64Flag) Names() []string {
+	return flagNames(f)
+}
+
+// IsRequired returns whether or not the flag is required
+func (f *Int64Flag) IsRequired() bool {
+	return f.Required
+}
+
+// TakesValue returns true of the flag takes a value, otherwise false
+func (f *Int64Flag) TakesValue() bool {
+	return true
+}
+
+// GetUsage returns the usage string for the flag
+func (f *Int64Flag) GetUsage() string {
+	return f.Usage
+}
+
+// GetValue returns the flags value as string representation and an empty
+// string if the flag takes no value at all.
+func (f *Int64Flag) GetValue() string {
+	return fmt.Sprintf("%d", f.Value)
+}
+
+// Apply populates the flag given the flag set and environment
+func (f *Int64Flag) Apply(set *flag.FlagSet) error {
+	if val, ok := flagFromEnvOrFile(f.EnvVars, f.FilePath); ok {
+		if val != "" {
+			valInt, err := strconv.ParseInt(val, 0, 64)
+
+			if err != nil {
+				return fmt.Errorf("could not parse %q as int value for flag %s: %s", val, f.Name, err)
+			}
+
+			f.Value = valInt
+			f.HasBeenSet = true
+		}
+	}
+
+	for _, name := range f.Names() {
+		if f.Destination != nil {
+			set.Int64Var(f.Destination, name, f.Value, f.Usage)
+			continue
+		}
+		set.Int64(name, f.Value, f.Usage)
+	}
+	return nil
+}
+
+// Int64 looks up the value of a local Int64Flag, returns
+// 0 if not found
+func (c *Context) Int64(name string) int64 {
+	if fs := lookupFlagSet(name, c); fs != nil {
+		return lookupInt64(name, fs)
+	}
+	return 0
+}
+
+func lookupInt64(name string, set *flag.FlagSet) int64 {
+	f := set.Lookup(name)
+	if f != nil {
+		parsed, err := strconv.ParseInt(f.Value.String(), 0, 64)
+		if err != nil {
+			return 0
+		}
+		return parsed
+	}
+	return 0
+}

vendor/github.com/urfave/cli/v2/flag_int64_slice.go

@@ -0,0 +1,161 @@
+package cli
+
+import (
+	"encoding/json"
+	"flag"
+	"fmt"
+	"strconv"
+	"strings"
+)
+
+// Int64Slice wraps []int64 to satisfy flag.Value
+type Int64Slice struct {
+	slice      []int64
+	hasBeenSet bool
+}
+
+// NewInt64Slice makes an *Int64Slice with default values
+func NewInt64Slice(defaults ...int64) *Int64Slice {
+	return &Int64Slice{slice: append([]int64{}, defaults...)}
+}
+
+// Set parses the value into an integer and appends it to the list of values
+func (i *Int64Slice) Set(value string) error {
+	if !i.hasBeenSet {
+		i.slice = []int64{}
+		i.hasBeenSet = true
+	}
+
+	if strings.HasPrefix(value, slPfx) {
+		// Deserializing assumes overwrite
+		_ = json.Unmarshal([]byte(strings.Replace(value, slPfx, "", 1)), &i.slice)
+		i.hasBeenSet = true
+		return nil
+	}
+
+	tmp, err := strconv.ParseInt(value, 0, 64)
+	if err != nil {
+		return err
+	}
+
+	i.slice = append(i.slice, tmp)
+
+	return nil
+}
+
+// String returns a readable representation of this value (for usage defaults)
+func (i *Int64Slice) String() string {
+	return fmt.Sprintf("%#v", i.slice)
+}
+
+// Serialize allows Int64Slice to fulfill Serializer
+func (i *Int64Slice) Serialize() string {
+	jsonBytes, _ := json.Marshal(i.slice)
+	return fmt.Sprintf("%s%s", slPfx, string(jsonBytes))
+}
+
+// Value returns the slice of ints set by this flag
+func (i *Int64Slice) Value() []int64 {
+	return i.slice
+}
+
+// Get returns the slice of ints set by this flag
+func (i *Int64Slice) Get() interface{} {
+	return *i
+}
+
+// Int64SliceFlag is a flag with type *Int64Slice
+type Int64SliceFlag struct {
+	Name        string
+	Aliases     []string
+	Usage       string
+	EnvVars     []string
+	FilePath    string
+	Required    bool
+	Hidden      bool
+	Value       *Int64Slice
+	DefaultText string
+	HasBeenSet  bool
+}
+
+// IsSet returns whether or not the flag has been set through env or file
+func (f *Int64SliceFlag) IsSet() bool {
+	return f.HasBeenSet
+}
+
+// String returns a readable representation of this value
+// (for usage defaults)
+func (f *Int64SliceFlag) String() string {
+	return FlagStringer(f)
+}
+
+// Names returns the names of the flag
+func (f *Int64SliceFlag) Names() []string {
+	return flagNames(f)
+}
+
+// IsRequired returns whether or not the flag is required
+func (f *Int64SliceFlag) IsRequired() bool {
+	return f.Required
+}
+
+// TakesValue returns true of the flag takes a value, otherwise false
+func (f *Int64SliceFlag) TakesValue() bool {
+	return true
+}
+
+// GetUsage returns the usage string for the flag
+func (f Int64SliceFlag) GetUsage() string {
+	return f.Usage
+}
+
+// GetValue returns the flags value as string representation and an empty
+// string if the flag takes no value at all.
+func (f *Int64SliceFlag) GetValue() string {
+	if f.Value != nil {
+		return f.Value.String()
+	}
+	return ""
+}
+
+// Apply populates the flag given the flag set and environment
+func (f *Int64SliceFlag) Apply(set *flag.FlagSet) error {
+	if val, ok := flagFromEnvOrFile(f.EnvVars, f.FilePath); ok {
+		f.Value = &Int64Slice{}
+
+		for _, s := range strings.Split(val, ",") {
+			if err := f.Value.Set(strings.TrimSpace(s)); err != nil {
+				return fmt.Errorf("could not parse %q as int64 slice value for flag %s: %s", val, f.Name, err)
+			}
+		}
+
+		f.HasBeenSet = true
+	}
+
+	for _, name := range f.Names() {
+		if f.Value == nil {
+			f.Value = &Int64Slice{}
+		}
+		set.Var(f.Value, name, f.Usage)
+	}
+
+	return nil
+}
+
+// Int64Slice looks up the value of a local Int64SliceFlag, returns
+// nil if not found
+func (c *Context) Int64Slice(name string) []int64 {
+	return lookupInt64Slice(name, c.flagSet)
+}
+
+func lookupInt64Slice(name string, set *flag.FlagSet) []int64 {
+	f := set.Lookup(name)
+	if f != nil {
+		parsed, err := (f.Value.(*Int64Slice)).Value(), error(nil)
+		if err != nil {
+			return nil
+		}
+		return parsed
+	}
+	return nil
+}

vendor/github.com/urfave/cli/v2/flag_int_slice.go

@@ -0,0 +1,175 @@
+package cli
+
+import (
+	"encoding/json"
+	"flag"
+	"fmt"
+	"strconv"
+	"strings"
+)
+
+// IntSlice wraps []int to satisfy flag.Value
+type IntSlice struct {
+	slice      []int
+	hasBeenSet bool
+}
+
+// NewIntSlice makes an *IntSlice with default values
+func NewIntSlice(defaults ...int) *IntSlice {
+	return &IntSlice{slice: append([]int{}, defaults...)}
+}
+
+// TODO: Consistently have specific Set function for Int64 and Float64 ?
+// SetInt directly adds an integer to the list of values
+func (i *IntSlice) SetInt(value int) {
+	if !i.hasBeenSet {
+		i.slice = []int{}
+		i.hasBeenSet = true
+	}
+
+	i.slice = append(i.slice, value)
+}
+
+// Set parses the value into an integer and appends it to the list of values
+func (i *IntSlice) Set(value string) error {
+	if !i.hasBeenSet {
+		i.slice = []int{}
+		i.hasBeenSet = true
+	}
+
+	if strings.HasPrefix(value, slPfx) {
+		// Deserializing assumes overwrite
+		_ = json.Unmarshal([]byte(strings.Replace(value, slPfx, "", 1)), &i.slice)
+		i.hasBeenSet = true
+		return nil
+	}
+
+	tmp, err := strconv.ParseInt(value, 0, 64)
+	if err != nil {
+		return err
+	}
+
+	i.slice = append(i.slice, int(tmp))
+
+	return nil
+}
+
+// String returns a readable representation of this value (for usage defaults)
+func (i *IntSlice) String() string {
+	return fmt.Sprintf("%#v", i.slice)
+}
+
+// Serialize allows IntSlice to fulfill Serializer
+func (i *IntSlice) Serialize() string {
+	jsonBytes, _ := json.Marshal(i.slice)
+	return fmt.Sprintf("%s%s", slPfx, string(jsonBytes))
+}
+
+// Value returns the slice of ints set by this flag
+func (i *IntSlice) Value() []int {
+	return i.slice
+}
+
+// Get returns the slice of ints set by this flag
+func (i *IntSlice) Get() interface{} {
+	return *i
+}
+
+// IntSliceFlag is a flag with type *IntSlice
+type IntSliceFlag struct {
+	Name        string
+	Aliases     []string
+	Usage       string
+	EnvVars     []string
+	FilePath    string
+	Required    bool
+	Hidden      bool
+	Value       *IntSlice
+	DefaultText string
+	HasBeenSet  bool
+}
+
+// IsSet returns whether or not the flag has been set through env or file
+func (f *IntSliceFlag) IsSet() bool {
+	return f.HasBeenSet
+}
+
+// String returns a readable representation of this value
+// (for usage defaults)
+func (f *IntSliceFlag) String() string {
+	return FlagStringer(f)
+}
+
+// Names returns the names of the flag
+func (f *IntSliceFlag) Names() []string {
+	return flagNames(f)
+}
+
+// IsRequired returns whether or not the flag is required
+func (f *IntSliceFlag) IsRequired() bool {
+	return f.Required
+}
+
+// TakesValue returns true of the flag takes a value, otherwise false
+func (f *IntSliceFlag) TakesValue() bool {
+	return true
+}
+
+// GetUsage returns the usage string for the flag
+func (f IntSliceFlag) GetUsage() string {
+	return f.Usage
+}
+
+// GetValue returns the flags value as string representation and an empty
+// string if the flag takes no value at all.
+func (f *IntSliceFlag) GetValue() string {
+	if f.Value != nil {
+		return f.Value.String()
+	}
+	return ""
+}
+
+// Apply populates the flag given the flag set and environment
+func (f *IntSliceFlag) Apply(set *flag.FlagSet) error {
+	if val, ok := flagFromEnvOrFile(f.EnvVars, f.FilePath); ok {
+		f.Value = &IntSlice{}
+
+		for _, s := range strings.Split(val, ",") {
+			if err := f.Value.Set(strings.TrimSpace(s)); err != nil {
+				return fmt.Errorf("could not parse %q as int slice value for flag %s: %s", val, f.Name, err)
+			}
+		}
+
+		f.HasBeenSet = true
+	}
+
+	for _, name := range f.Names() {
+		if f.Value == nil {
+			f.Value = &IntSlice{}
+		}
+		set.Var(f.Value, name, f.Usage)
+	}
+
+	return nil
+}
+
+// IntSlice looks up the value of a local IntSliceFlag, returns
+// nil if not found
+func (c *Context) IntSlice(name string) []int {
+	if fs := lookupFlagSet(name, c); fs != nil {
+		return lookupIntSlice(name, c.flagSet)
+	}
+	return nil
+}
+
+func lookupIntSlice(name string, set *flag.FlagSet) []int {
+	f := set.Lookup(name)
+	if f != nil {
+		parsed, err := (f.Value.(*IntSlice)).Value(), error(nil)
+		if err != nil {
+			return nil
+		}
+		return parsed
+	}
+	return nil
+}

vendor/github.com/urfave/cli/v2/flag_path.go

@@ -0,0 +1,95 @@
+package cli
+
+import "flag"
+
+type PathFlag struct {
+	Name        string
+	Aliases     []string
+	Usage       string
+	EnvVars     []string
+	FilePath    string
+	Required    bool
+	Hidden      bool
+	TakesFile   bool
+	Value       string
+	DefaultText string
+	Destination *string
+	HasBeenSet  bool
+}
+
+// IsSet returns whether or not the flag has been set through env or file
+func (f *PathFlag) IsSet() bool {
+	return f.HasBeenSet
+}
+
+// String returns a readable representation of this value
+// (for usage defaults)
+func (f *PathFlag) String() string {
+	return FlagStringer(f)
+}
+
+// Names returns the names of the flag
+func (f *PathFlag) Names() []string {
+	return flagNames(f)
+}
+
+// IsRequired returns whether or not the flag is required
+func (f *PathFlag) IsRequired() bool {
+	return f.Required
+}
+
+// TakesValue returns true of the flag takes a value, otherwise false
+func (f *PathFlag) TakesValue() bool {
+	return true
+}
+
+// GetUsage returns the usage string for the flag
+func (f *PathFlag) GetUsage() string {
+	return f.Usage
+}
+
+// GetValue returns the flags value as string representation and an empty
+// string if the flag takes no value at all.
+func (f *PathFlag) GetValue() string {
+	return f.Value
+}
+
+// Apply populates the flag given the flag set and environment
+func (f *PathFlag) Apply(set *flag.FlagSet) error {
+	if val, ok := flagFromEnvOrFile(f.EnvVars, f.FilePath); ok {
+		f.Value = val
+		f.HasBeenSet = true
+	}
+
+	for _, name := range f.Names() {
+		if f.Destination != nil {
+			set.StringVar(f.Destination, name, f.Value, f.Usage)
+			continue
+		}
+		set.String(name, f.Value, f.Usage)
+	}
+
+	return nil
+}
+
+// Path looks up the value of a local PathFlag, returns
+// "" if not found
+func (c *Context) Path(name string) string {
+	if fs := lookupFlagSet(name, c); fs != nil {
+		return lookupPath(name, fs)
+	}
+
+	return ""
+}
+
+func lookupPath(name string, set *flag.FlagSet) string {
+	f := set.Lookup(name)
+	if f != nil {
+		parsed, err := f.Value.String(), error(nil)
+		if err != nil {
+			return ""
+		}
+		return parsed
+	}
+	return ""
+}

vendor/github.com/urfave/cli/v2/flag_string.go

@@ -0,0 +1,95 @@
+package cli
+
+import "flag"
+
+// StringFlag is a flag with type string
+type StringFlag struct {
+	Name        string
+	Aliases     []string
+	Usage       string
+	EnvVars     []string
+	FilePath    string
+	Required    bool
+	Hidden      bool
+	TakesFile   bool
+	Value       string
+	DefaultText string
+	Destination *string
+	HasBeenSet  bool
+}
+
+// IsSet returns whether or not the flag has been set through env or file
+func (f *StringFlag) IsSet() bool {
+	return f.HasBeenSet
+}
+
+// String returns a readable representation of this value
+// (for usage defaults)
+func (f *StringFlag) String() string {
+	return FlagStringer(f)
+}
+
+// Names returns the names of the flag
+func (f *StringFlag) Names() []string {
+	return flagNames(f)
+}
+
+// IsRequired returns whether or not the flag is required
+func (f *StringFlag) IsRequired() bool {
+	return f.Required
+}
+
+// TakesValue returns true of the flag takes a value, otherwise false
+func (f *StringFlag) TakesValue() bool {
+	return true
+}
+
+// GetUsage returns the usage string for the flag
+func (f *StringFlag) GetUsage() string {
+	return f.Usage
+}
+
+// GetValue returns the flags value as string representation and an empty
+// string if the flag takes no value at all.
+func (f *StringFlag) GetValue() string {
+	return f.Value
+}
+
+// Apply populates the flag given the flag set and environment
+func (f *StringFlag) Apply(set *flag.FlagSet) error {
+	if val, ok := flagFromEnvOrFile(f.EnvVars, f.FilePath); ok {
+		f.Value = val
+		f.HasBeenSet = true
+	}
+
+	for _, name := range f.Names() {
+		if f.Destination != nil {
+			set.StringVar(f.Destination, name, f.Value, f.Usage)
+			continue
+		}
+		set.String(name, f.Value, f.Usage)
+	}
+
+	return nil
+}
+
+// String looks up the value of a local StringFlag, returns
+// "" if not found
+func (c *Context) String(name string) string {
+	if fs := lookupFlagSet(name, c); fs != nil {
+		return lookupString(name, fs)
+	}
+	return ""
+}
+
+func lookupString(name string, set *flag.FlagSet) string {
+	f := set.Lookup(name)
+	if f != nil {
+		parsed, err := f.Value.String(), error(nil)
+		if err != nil {
+			return ""
+		}
+		return parsed
+	}
+	return ""
+}

vendor/github.com/urfave/cli/v2/flag_string_slice.go

@@ -0,0 +1,159 @@
+package cli
+
+import (
+	"encoding/json"
+	"flag"
+	"fmt"
+	"strings"
+)
+
+// StringSlice wraps a []string to satisfy flag.Value
+type StringSlice struct {
+	slice      []string
+	hasBeenSet bool
+}
+
+// NewStringSlice creates a *StringSlice with default values
+func NewStringSlice(defaults ...string) *StringSlice {
+	return &StringSlice{slice: append([]string{}, defaults...)}
+}
+
+// Set appends the string value to the list of values
+func (s *StringSlice) Set(value string) error {
+	if !s.hasBeenSet {
+		s.slice = []string{}
+		s.hasBeenSet = true
+	}
+
+	if strings.HasPrefix(value, slPfx) {
+		// Deserializing assumes overwrite
+		_ = json.Unmarshal([]byte(strings.Replace(value, slPfx, "", 1)), &s.slice)
+		s.hasBeenSet = true
+		return nil
+	}
+
+	s.slice = append(s.slice, value)
+
+	return nil
+}
+
+// String returns a readable representation of this value (for usage defaults)
+func (s *StringSlice) String() string {
+	return fmt.Sprintf("%s", s.slice)
+}
+
+// Serialize allows StringSlice to fulfill Serializer
+func (s *StringSlice) Serialize() string {
+	jsonBytes, _ := json.Marshal(s.slice)
+	return fmt.Sprintf("%s%s", slPfx, string(jsonBytes))
+}
+
+// Value returns the slice of strings set by this flag
+func (s *StringSlice) Value() []string {
+	return s.slice
+}
+
+// Get returns the slice of strings set by this flag
+func (s *StringSlice) Get() interface{} {
+	return *s
+}
+
+// StringSliceFlag is a flag with type *StringSlice
+type StringSliceFlag struct {
+	Name        string
+	Aliases     []string
+	Usage       string
+	EnvVars     []string
+	FilePath    string
+	Required    bool
+	Hidden      bool
+	TakesFile   bool
+	Value       *StringSlice
+	DefaultText string
+	HasBeenSet  bool
+}
+
+// IsSet returns whether or not the flag has been set through env or file
+func (f *StringSliceFlag) IsSet() bool {
+	return f.HasBeenSet
+}
+
+// String returns a readable representation of this value
+// (for usage defaults)
+func (f *StringSliceFlag) String() string {
+	return FlagStringer(f)
+}
+
+// Names returns the names of the flag
+func (f *StringSliceFlag) Names() []string {
+	return flagNames(f)
+}
+
+// IsRequired returns whether or not the flag is required
+func (f *StringSliceFlag) IsRequired() bool {
+	return f.Required
+}
+
+// TakesValue returns true of the flag takes a value, otherwise false
+func (f *StringSliceFlag) TakesValue() bool {
+	return true
+}
+
+// GetUsage returns the usage string for the flag
+func (f *StringSliceFlag) GetUsage() string {
+	return f.Usage
+}
+
+// GetValue returns the flags value as string representation and an empty
+// string if the flag takes no value at all.
+func (f *StringSliceFlag) GetValue() string {
+	if f.Value != nil {
+		return f.Value.String()
+	}
+	return ""
+}
+
+// Apply populates the flag given the flag set and environment
+func (f *StringSliceFlag) Apply(set *flag.FlagSet) error {
+	if val, ok := flagFromEnvOrFile(f.EnvVars, f.FilePath); ok {
+		f.Value = &StringSlice{}
+
+		for _, s := range strings.Split(val, ",") {
+			if err := f.Value.Set(strings.TrimSpace(s)); err != nil {
+				return fmt.Errorf("could not parse %q as string value for flag %s: %s", val, f.Name, err)
+			}
+		}
+
+		f.HasBeenSet = true
+	}
+
+	for _, name := range f.Names() {
+		if f.Value == nil {
+			f.Value = &StringSlice{}
+		}
+		set.Var(f.Value, name, f.Usage)
+	}
+
+	return nil
+}
+
+// StringSlice looks up the value of a local StringSliceFlag, returns
+// nil if not found
+func (c *Context) StringSlice(name string) []string {
+	if fs := lookupFlagSet(name, c); fs != nil {
+		return lookupStringSlice(name, fs)
+	}
+	return nil
+}
+
+func lookupStringSlice(name string, set *flag.FlagSet) []string {
+	f := set.Lookup(name)
+	if f != nil {
+		parsed, err := (f.Value.(*StringSlice)).Value(), error(nil)
+		if err != nil {
+			return nil
+		}
+		return parsed
+	}
+	return nil
+}

vendor/github.com/urfave/cli/v2/flag_timestamp.go

@@ -0,0 +1,152 @@
+package cli
+
+import (
+	"flag"
+	"fmt"
+	"time"
+)
+
+// Timestamp wrap to satisfy golang's flag interface.
+type Timestamp struct {
+	timestamp  *time.Time
+	hasBeenSet bool
+	layout     string
+}
+
+// Timestamp constructor
+func NewTimestamp(timestamp time.Time) *Timestamp {
+	return &Timestamp{timestamp: &timestamp}
+}
+
+// Set the timestamp value directly
+func (t *Timestamp) SetTimestamp(value time.Time) {
+	if !t.hasBeenSet {
+		t.timestamp = &value
+		t.hasBeenSet = true
+	}
+}
+
+// Set the timestamp string layout for future parsing
+func (t *Timestamp) SetLayout(layout string) {
+	t.layout = layout
+}
+
+// Parses the string value to timestamp
+func (t *Timestamp) Set(value string) error {
+	timestamp, err := time.Parse(t.layout, value)
+	if err != nil {
+		return err
+	}
+
+	t.timestamp = &timestamp
+	t.hasBeenSet = true
+	return nil
+}
+
+// String returns a readable representation of this value (for usage defaults)
+func (t *Timestamp) String() string {
+	return fmt.Sprintf("%#v", t.timestamp)
+}
+
+// Value returns the timestamp value stored in the flag
+func (t *Timestamp) Value() *time.Time {
+	return t.timestamp
+}
+
+// Get returns the flag structure
+func (t *Timestamp) Get() interface{} {
+	return *t
+}
+
+// TimestampFlag is a flag with type time
+type TimestampFlag struct {
+	Name        string
+	Aliases     []string
+	Usage       string
+	EnvVars     []string
+	FilePath    string
+	Required    bool
+	Hidden      bool
+	Layout      string
+	Value       *Timestamp
+	DefaultText string
+	HasBeenSet  bool
+}
+
+// IsSet returns whether or not the flag has been set through env or file
+func (f *TimestampFlag) IsSet() bool {
+	return f.HasBeenSet
+}
+
+// String returns a readable representation of this value
+// (for usage defaults)
+func (f *TimestampFlag) String() string {
+	return FlagStringer(f)
+}
+
+// Names returns the names of the flag
+func (f *TimestampFlag) Names() []string {
+	return flagNames(f)
+}
+
+// IsRequired returns whether or not the flag is required
+func (f *TimestampFlag) IsRequired() bool {
+	return f.Required
+}
+
+// TakesValue returns true of the flag takes a value, otherwise false
+func (f *TimestampFlag) TakesValue() bool {
+	return true
+}
+
+// GetUsage returns the usage string for the flag
+func (f *TimestampFlag) GetUsage() string {
+	return f.Usage
+}
+
+// GetValue returns the flags value as string representation and an empty
+// string if the flag takes no value at all.
+func (f *TimestampFlag) GetValue() string {
+	if f.Value != nil {
+		return f.Value.timestamp.String()
+	}
+	return ""
+}
+
+// Apply populates the flag given the flag set and environment
+func (f *TimestampFlag) Apply(set *flag.FlagSet) error {
+	if f.Layout == "" {
+		return fmt.Errorf("timestamp Layout is required")
+	}
+	f.Value = &Timestamp{}
+	f.Value.SetLayout(f.Layout)
+
+	if val, ok := flagFromEnvOrFile(f.EnvVars, f.FilePath); ok {
+		if err := f.Value.Set(val); err != nil {
+			return fmt.Errorf("could not parse %q as timestamp value for flag %s: %s", val, f.Name, err)
+		}
+		f.HasBeenSet = true
+	}
+
+	for _, name := range f.Names() {
+		set.Var(f.Value, name, f.Usage)
+	}
+	return nil
+}
+
+// Timestamp gets the timestamp from a flag name
+func (c *Context) Timestamp(name string) *time.Time {
+	if fs := lookupFlagSet(name, c); fs != nil {
+		return lookupTimestamp(name, fs)
+	}
+	return nil
+}
+
+// Fetches the timestamp value from the local timestampWrap
+func lookupTimestamp(name string, set *flag.FlagSet) *time.Time {
+	f := set.Lookup(name)
+	if f != nil {
+		return (f.Value.(*Timestamp)).Value()
+	}
+	return nil
+}

vendor/github.com/urfave/cli/v2/flag_uint.go

@@ -0,0 +1,105 @@
+package cli
+
+import (
+	"flag"
+	"fmt"
+	"strconv"
+)
+
+// UintFlag is a flag with type uint
+type UintFlag struct {
+	Name        string
+	Aliases     []string
+	Usage       string
+	EnvVars     []string
+	FilePath    string
+	Required    bool
+	Hidden      bool
+	Value       uint
+	DefaultText string
+	Destination *uint
+	HasBeenSet  bool
+}
+
+// IsSet returns whether or not the flag has been set through env or file
+func (f *UintFlag) IsSet() bool {
+	return f.HasBeenSet
+}
+
+// String returns a readable representation of this value
+// (for usage defaults)
+func (f *UintFlag) String() string {
+	return FlagStringer(f)
+}
+
+// Names returns the names of the flag
+func (f *UintFlag) Names() []string {
+	return flagNames(f)
+}
+
+// IsRequired returns whether or not the flag is required
+func (f *UintFlag) IsRequired() bool {
+	return f.Required
+}
+
+// TakesValue returns true of the flag takes a value, otherwise false
+func (f *UintFlag) TakesValue() bool {
+	return true
+}
+
+// GetUsage returns the usage string for the flag
+func (f *UintFlag) GetUsage() string {
+	return f.Usage
+}
+
+// Apply populates the flag given the flag set and environment
+func (f *UintFlag) Apply(set *flag.FlagSet) error {
+	if val, ok := flagFromEnvOrFile(f.EnvVars, f.FilePath); ok {
+		if val != "" {
+			valInt, err := strconv.ParseUint(val, 0, 64)
+			if err != nil {
+				return fmt.Errorf("could not parse %q as uint value for flag %s: %s", val, f.Name, err)
+			}
+
+			f.Value = uint(valInt)
+			f.HasBeenSet = true
+		}
+	}
+
+	for _, name := range f.Names() {
+		if f.Destination != nil {
+			set.UintVar(f.Destination, name, f.Value, f.Usage)
+			continue
+		}
+		set.Uint(name, f.Value, f.Usage)
+	}
+
+	return nil
+}
+
+// GetValue returns the flags value as string representation and an empty
+// string if the flag takes no value at all.
+func (f *UintFlag) GetValue() string {
+	return fmt.Sprintf("%d", f.Value)
+}
+
+// Uint looks up the value of a local UintFlag, returns
+// 0 if not found
+func (c *Context) Uint(name string) uint {
+	if fs := lookupFlagSet(name, c); fs != nil {
+		return lookupUint(name, fs)
+	}
+	return 0
+}
+
+func lookupUint(name string, set *flag.FlagSet) uint {
+	f := set.Lookup(name)
+	if f != nil {
+		parsed, err := strconv.ParseUint(f.Value.String(), 0, 64)
+		if err != nil {
+			return 0
+		}
+		return uint(parsed)
+	}
+	return 0
+}

vendor/github.com/urfave/cli/v2/flag_uint64.go

@@ -0,0 +1,105 @@
+package cli
+
+import (
+	"flag"
+	"fmt"
+	"strconv"
+)
+
+// Uint64Flag is a flag with type uint64
+type Uint64Flag struct {
+	Name        string
+	Aliases     []string
+	Usage       string
+	EnvVars     []string
+	FilePath    string
+	Required    bool
+	Hidden      bool
+	Value       uint64
+	DefaultText string
+	Destination *uint64
+	HasBeenSet  bool
+}
+
+// IsSet returns whether or not the flag has been set through env or file
+func (f *Uint64Flag) IsSet() bool {
+	return f.HasBeenSet
+}
+
+// String returns a readable representation of this value
+// (for usage defaults)
+func (f *Uint64Flag) String() string {
+	return FlagStringer(f)
+}
+
+// Names returns the names of the flag
+func (f *Uint64Flag) Names() []string {
+	return flagNames(f)
+}
+
+// IsRequired returns whether or not the flag is required
+func (f *Uint64Flag) IsRequired() bool {
+	return f.Required
+}
+
+// TakesValue returns true of the flag takes a value, otherwise false
+func (f *Uint64Flag) TakesValue() bool {
+	return true
+}
+
+// GetUsage returns the usage string for the flag
+func (f *Uint64Flag) GetUsage() string {
+	return f.Usage
+}
+
+// Apply populates the flag given the flag set and environment
+func (f *Uint64Flag) Apply(set *flag.FlagSet) error {
+	if val, ok := flagFromEnvOrFile(f.EnvVars, f.FilePath); ok {
+		if val != "" {
+			valInt, err := strconv.ParseUint(val, 0, 64)
+			if err != nil {
+				return fmt.Errorf("could not parse %q as uint64 value for flag %s: %s", val, f.Name, err)
+			}
+
+			f.Value = valInt
+			f.HasBeenSet = true
+		}
+	}
+
+	for _, name := range f.Names() {
+		if f.Destination != nil {
+			set.Uint64Var(f.Destination, name, f.Value, f.Usage)
+			continue
+		}
+		set.Uint64(name, f.Value, f.Usage)
+	}
+
+	return nil
+}
+
+// GetValue returns the flags value as string representation and an empty
+// string if the flag takes no value at all.
+func (f *Uint64Flag) GetValue() string {
+	return fmt.Sprintf("%d", f.Value)
+}
+
+// Uint64 looks up the value of a local Uint64Flag, returns
+// 0 if not found
+func (c *Context) Uint64(name string) uint64 {
+	if fs := lookupFlagSet(name, c); fs != nil {
+		return lookupUint64(name, fs)
+	}
+	return 0
+}
+
+func lookupUint64(name string, set *flag.FlagSet) uint64 {
+	f := set.Lookup(name)
+	if f != nil {
+		parsed, err := strconv.ParseUint(f.Value.String(), 0, 64)
+		if err != nil {
+			return 0
+		}
+		return parsed
+	}
+	return 0
+}

vendor/github.com/urfave/cli/v2/funcs.go

@@ -0,0 +1,44 @@
+package cli
+
+// BashCompleteFunc is an action to execute when the shell completion flag is set
+type BashCompleteFunc func(*Context)
+
+// BeforeFunc is an action to execute before any subcommands are run, but after
+// the context is ready if a non-nil error is returned, no subcommands are run
+type BeforeFunc func(*Context) error
+
+// AfterFunc is an action to execute after any subcommands are run, but after the
+// subcommand has finished it is run even if Action() panics
+type AfterFunc func(*Context) error
+
+// ActionFunc is the action to execute when no subcommands are specified
+type ActionFunc func(*Context) error
+
+// CommandNotFoundFunc is executed if the proper command cannot be found
+type CommandNotFoundFunc func(*Context, string)
+
+// OnUsageErrorFunc is executed if an usage error occurs. This is useful for displaying
+// customized usage error messages.  This function is able to replace the
+// original error messages.  If this function is not set, the "Incorrect usage"
+// is displayed and the execution is interrupted.
+type OnUsageErrorFunc func(context *Context, err error, isSubcommand bool) error
+
+// ExitErrHandlerFunc is executed if provided in order to handle exitError values
+// returned by Actions and Before/After functions.
+type ExitErrHandlerFunc func(context *Context, err error)
+
+// FlagStringFunc is used by the help generation to display a flag, which is
+// expected to be a single line.
+type FlagStringFunc func(Flag) string
+
+// FlagNamePrefixFunc is used by the default FlagStringFunc to create prefix
+// text for a flag's full name.
+type FlagNamePrefixFunc func(fullName []string, placeholder string) string
+
+// FlagEnvHintFunc is used by the default FlagStringFunc to annotate flag help
+// with the environment variable details.
+type FlagEnvHintFunc func(envVars []string, str string) string
+
+// FlagFileHintFunc is used by the default FlagStringFunc to annotate flag help
+// with the file path details.
+type FlagFileHintFunc func(filePath, str string) string

vendor/github.com/urfave/cli/v2/go.mod

@@ -0,0 +1,9 @@
+module github.com/urfave/cli/v2
+
+go 1.11
+
+require (
+	github.com/BurntSushi/toml v0.3.1
+	github.com/cpuguy83/go-md2man/v2 v2.0.0-20190314233015-f79a8a8ca69d
+	gopkg.in/yaml.v2 v2.2.2
+)

vendor/github.com/urfave/cli/v2/go.sum

@@ -0,0 +1,14 @@
+github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
+github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
+github.com/cpuguy83/go-md2man/v2 v2.0.0-20190314233015-f79a8a8ca69d h1:U+s90UTSYgptZMwQh2aRr3LuazLJIa+Pg3Kc1ylSYVY=
+github.com/cpuguy83/go-md2man/v2 v2.0.0-20190314233015-f79a8a8ca69d/go.mod h1:maD7wRr/U5Z6m/iR4s+kqSMx2CaBsrgA7czyZG/E6dU=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/russross/blackfriday/v2 v2.0.1 h1:lPqVAte+HuHNfhJ/0LC98ESWRz8afy9tM/0RK8m9o+Q=
+github.com/russross/blackfriday/v2 v2.0.1/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
+github.com/shurcooL/sanitized_anchor_name v1.0.0 h1:PdmoCO6wvbs+7yrJyMORt4/BmY5IYyJwS/kOiWx8mHo=
+github.com/shurcooL/sanitized_anchor_name v1.0.0/go.mod h1:1NzhyTcUVG4SuEtjjoZeVRXNmyL/1OwPU0+IJeTBvfc=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw=
+gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=

vendor/github.com/urfave/cli/v2/help.go

@@ -0,0 +1,368 @@
+package cli
+
+import (
+	"fmt"
+	"io"
+	"os"
+	"strings"
+	"text/tabwriter"
+	"text/template"
+	"unicode/utf8"
+)
+
+var helpCommand = &Command{
+	Name:      "help",
+	Aliases:   []string{"h"},
+	Usage:     "Shows a list of commands or help for one command",
+	ArgsUsage: "[command]",
+	Action: func(c *Context) error {
+		args := c.Args()
+		if args.Present() {
+			return ShowCommandHelp(c, args.First())
+		}
+
+		_ = ShowAppHelp(c)
+		return nil
+	},
+}
+
+var helpSubcommand = &Command{
+	Name:      "help",
+	Aliases:   []string{"h"},
+	Usage:     "Shows a list of commands or help for one command",
+	ArgsUsage: "[command]",
+	Action: func(c *Context) error {
+		args := c.Args()
+		if args.Present() {
+			return ShowCommandHelp(c, args.First())
+		}
+
+		return ShowSubcommandHelp(c)
+	},
+}
+
+// Prints help for the App or Command
+type helpPrinter func(w io.Writer, templ string, data interface{})
+
+// Prints help for the App or Command with custom template function.
+type helpPrinterCustom func(w io.Writer, templ string, data interface{}, customFunc map[string]interface{})
+
+// HelpPrinter is a function that writes the help output. If not set explicitly,
+// this calls HelpPrinterCustom using only the default template functions.
+//
+// If custom logic for printing help is required, this function can be
+// overridden. If the ExtraInfo field is defined on an App, this function
+// should not be modified, as HelpPrinterCustom will be used directly in order
+// to capture the extra information.
+var HelpPrinter helpPrinter = printHelp
+
+// HelpPrinterCustom is a function that writes the help output. It is used as
+// the default implementation of HelpPrinter, and may be called directly if
+// the ExtraInfo field is set on an App.
+var HelpPrinterCustom helpPrinterCustom = printHelpCustom
+
+// VersionPrinter prints the version for the App
+var VersionPrinter = printVersion
+
+// ShowAppHelpAndExit - Prints the list of subcommands for the app and exits with exit code.
+func ShowAppHelpAndExit(c *Context, exitCode int) {
+	_ = ShowAppHelp(c)
+	os.Exit(exitCode)
+}
+
+// ShowAppHelp is an action that displays the help.
+func ShowAppHelp(c *Context) error {
+	template := c.App.CustomAppHelpTemplate
+	if template == "" {
+		template = AppHelpTemplate
+	}
+
+	if c.App.ExtraInfo == nil {
+		HelpPrinter(c.App.Writer, template, c.App)
+		return nil
+	}
+
+	customAppData := func() map[string]interface{} {
+		return map[string]interface{}{
+			"ExtraInfo": c.App.ExtraInfo,
+		}
+	}
+	HelpPrinterCustom(c.App.Writer, template, c.App, customAppData())
+
+	return nil
+}
+
+// DefaultAppComplete prints the list of subcommands as the default app completion method
+func DefaultAppComplete(c *Context) {
+	DefaultCompleteWithFlags(nil)(c)
+}
+
+func printCommandSuggestions(commands []*Command, writer io.Writer) {
+	for _, command := range commands {
+		if command.Hidden {
+			continue
+		}
+		if os.Getenv("_CLI_ZSH_AUTOCOMPLETE_HACK") == "1" {
+			for _, name := range command.Names() {
+				_, _ = fmt.Fprintf(writer, "%s:%s\n", name, command.Usage)
+			}
+		} else {
+			for _, name := range command.Names() {
+				_, _ = fmt.Fprintf(writer, "%s\n", name)
+			}
+		}
+	}
+}
+
+func cliArgContains(flagName string) bool {
+	for _, name := range strings.Split(flagName, ",") {
+		name = strings.TrimSpace(name)
+		count := utf8.RuneCountInString(name)
+		if count > 2 {
+			count = 2
+		}
+		flag := fmt.Sprintf("%s%s", strings.Repeat("-", count), name)
+		for _, a := range os.Args {
+			if a == flag {
+				return true
+			}
+		}
+	}
+	return false
+}
+
+func printFlagSuggestions(lastArg string, flags []Flag, writer io.Writer) {
+	cur := strings.TrimPrefix(lastArg, "-")
+	cur = strings.TrimPrefix(cur, "-")
+	for _, flag := range flags {
+		if bflag, ok := flag.(*BoolFlag); ok && bflag.Hidden {
+			continue
+		}
+		for _, name := range flag.Names() {
+			name = strings.TrimSpace(name)
+			// this will get total count utf8 letters in flag name
+			count := utf8.RuneCountInString(name)
+			if count > 2 {
+				count = 2 // resuse this count to generate single - or -- in flag completion
+			}
+			// if flag name has more than one utf8 letter and last argument in cli has -- prefix then
+			// skip flag completion for short flags example -v or -x
+			if strings.HasPrefix(lastArg, "--") && count == 1 {
+				continue
+			}
+			// match if last argument matches this flag and it is not repeated
+			if strings.HasPrefix(name, cur) && cur != name && !cliArgContains(name) {
+				flagCompletion := fmt.Sprintf("%s%s", strings.Repeat("-", count), name)
+				_, _ = fmt.Fprintln(writer, flagCompletion)
+			}
+		}
+	}
+}
+
+func DefaultCompleteWithFlags(cmd *Command) func(c *Context) {
+	return func(c *Context) {
+		if len(os.Args) > 2 {
+			lastArg := os.Args[len(os.Args)-2]
+			if strings.HasPrefix(lastArg, "-") {
+				printFlagSuggestions(lastArg, c.App.Flags, c.App.Writer)
+				if cmd != nil {
+					printFlagSuggestions(lastArg, cmd.Flags, c.App.Writer)
+				}
+				return
+			}
+		}
+		if cmd != nil {
+			printCommandSuggestions(cmd.Subcommands, c.App.Writer)
+		} else {
+			printCommandSuggestions(c.App.Commands, c.App.Writer)
+		}
+	}
+}
+
+// ShowCommandHelpAndExit - exits with code after showing help
+func ShowCommandHelpAndExit(c *Context, command string, code int) {
+	_ = ShowCommandHelp(c, command)
+	os.Exit(code)
+}
+
+// ShowCommandHelp prints help for the given command
+func ShowCommandHelp(ctx *Context, command string) error {
+	// show the subcommand help for a command with subcommands
+	if command == "" {
+		HelpPrinter(ctx.App.Writer, SubcommandHelpTemplate, ctx.App)
+		return nil
+	}
+
+	for _, c := range ctx.App.Commands {
+		if c.HasName(command) {
+			templ := c.CustomHelpTemplate
+			if templ == "" {
+				templ = CommandHelpTemplate
+			}
+
+			HelpPrinter(ctx.App.Writer, templ, c)
+
+			return nil
+		}
+	}
+
+	if ctx.App.CommandNotFound == nil {
+		return Exit(fmt.Sprintf("No help topic for '%v'", command), 3)
+	}
+
+	ctx.App.CommandNotFound(ctx, command)
+	return nil
+}
+
+// ShowSubcommandHelp prints help for the given subcommand
+func ShowSubcommandHelp(c *Context) error {
+	if c == nil {
+		return nil
+	}
+
+	if c.Command != nil {
+		return ShowCommandHelp(c, c.Command.Name)
+	}
+
+	return ShowCommandHelp(c, "")
+}
+
+// ShowVersion prints the version number of the App
+func ShowVersion(c *Context) {
+	VersionPrinter(c)
+}
+
+func printVersion(c *Context) {
+	_, _ = fmt.Fprintf(c.App.Writer, "%v version %v\n", c.App.Name, c.App.Version)
+}
+
+// ShowCompletions prints the lists of commands within a given context
+func ShowCompletions(c *Context) {
+	a := c.App
+	if a != nil && a.BashComplete != nil {
+		a.BashComplete(c)
+	}
+}
+
+// ShowCommandCompletions prints the custom completions for a given command
+func ShowCommandCompletions(ctx *Context, command string) {
+	c := ctx.App.Command(command)
+	if c != nil {
+		if c.BashComplete != nil {
+			c.BashComplete(ctx)
+		} else {
+			DefaultCompleteWithFlags(c)(ctx)
+		}
+	}
+
+}
+
+// printHelpCustom is the default implementation of HelpPrinterCustom.
+//
+// The customFuncs map will be combined with a default template.FuncMap to
+// allow using arbitrary functions in template rendering.
+func printHelpCustom(out io.Writer, templ string, data interface{}, customFuncs map[string]interface{}) {
+	funcMap := template.FuncMap{
+		"join": strings.Join,
+	}
+	for key, value := range customFuncs {
+		funcMap[key] = value
+	}
+
+	w := tabwriter.NewWriter(out, 1, 8, 2, ' ', 0)
+	t := template.Must(template.New("help").Funcs(funcMap).Parse(templ))
+
+	err := t.Execute(w, data)
+	if err != nil {
+		// If the writer is closed, t.Execute will fail, and there's nothing
+		// we can do to recover.
+		if os.Getenv("CLI_TEMPLATE_ERROR_DEBUG") != "" {
+			_, _ = fmt.Fprintf(ErrWriter, "CLI TEMPLATE ERROR: %#v\n", err)
+		}
+		return
+	}
+	_ = w.Flush()
+}
+
+func printHelp(out io.Writer, templ string, data interface{}) {
+	HelpPrinterCustom(out, templ, data, nil)
+}
+
+func checkVersion(c *Context) bool {
+	found := false
+	for _, name := range VersionFlag.Names() {
+		if c.Bool(name) {
+			found = true
+		}
+	}
+	return found
+}
+
+func checkHelp(c *Context) bool {
+	found := false
+	for _, name := range HelpFlag.Names() {
+		if c.Bool(name) {
+			found = true
+		}
+	}
+	return found
+}
+
+func checkCommandHelp(c *Context, name string) bool {
+	if c.Bool("h") || c.Bool("help") {
+		_ = ShowCommandHelp(c, name)
+		return true
+	}
+
+	return false
+}
+
+func checkSubcommandHelp(c *Context) bool {
+	if c.Bool("h") || c.Bool("help") {
+		_ = ShowSubcommandHelp(c)
+		return true
+	}
+
+	return false
+}
+
+func checkShellCompleteFlag(a *App, arguments []string) (bool, []string) {
+	if !a.EnableBashCompletion {
+		return false, arguments
+	}
+
+	pos := len(arguments) - 1
+	lastArg := arguments[pos]
+
+	if lastArg != "--generate-bash-completion" {
+		return false, arguments
+	}
+
+	return true, arguments[:pos]
+}
+
+func checkCompletions(c *Context) bool {
+	if !c.shellComplete {
+		return false
+	}
+
+	if args := c.Args(); args.Present() {
+		name := args.First()
+		if cmd := c.App.Command(name); cmd != nil {
+			// let the command handle the completion
+			return false
+		}
+	}
+
+	ShowCompletions(c)
+	return true
+}
+
+func checkCommandCompletions(c *Context, name string) bool {
+	if !c.shellComplete {
+		return false
+	}
+
+	ShowCommandCompletions(c, name)
+	return true
+}

vendor/github.com/urfave/cli/v2/parse.go

@@ -0,0 +1,94 @@
+package cli
+
+import (
+	"flag"
+	"strings"
+)
+
+type iterativeParser interface {
+	newFlagSet() (*flag.FlagSet, error)
+	useShortOptionHandling() bool
+}
+
+// To enable short-option handling (e.g., "-it" vs "-i -t") we have to
+// iteratively catch parsing errors. This way we achieve LR parsing without
+// transforming any arguments. Otherwise, there is no way we can discriminate
+// combined short options from common arguments that should be left untouched.
+// Pass `shellComplete` to continue parsing options on failure during shell
+// completion when, the user-supplied options may be incomplete.
+func parseIter(set *flag.FlagSet, ip iterativeParser, args []string, shellComplete bool) error {
+	for {
+		err := set.Parse(args)
+		if !ip.useShortOptionHandling() || err == nil {
+			if shellComplete {
+				return nil
+			}
+			return err
+		}
+
+		errStr := err.Error()
+		trimmed := strings.TrimPrefix(errStr, "flag provided but not defined: -")
+		if errStr == trimmed {
+			return err
+		}
+
+		// regenerate the initial args with the split short opts
+		argsWereSplit := false
+		for i, arg := range args {
+			// skip args that are not part of the error message
+			if name := strings.TrimLeft(arg, "-"); name != trimmed {
+				continue
+			}
+
+			// if we can't split, the error was accurate
+			shortOpts := splitShortOptions(set, arg)
+			if len(shortOpts) == 1 {
+				return err
+			}
+
+			// swap current argument with the split version
+			args = append(args[:i], append(shortOpts, args[i+1:]...)...)
+			argsWereSplit = true
+			break
+		}
+
+		// This should be an impossible to reach code path, but in case the arg
+		// splitting failed to happen, this will prevent infinite loops
+		if !argsWereSplit {
+			return err
+		}
+
+		// Since custom parsing failed, replace the flag set before retrying
+		newSet, err := ip.newFlagSet()
+		if err != nil {
+			return err
+		}
+		*set = *newSet
+	}
+}
+
+func splitShortOptions(set *flag.FlagSet, arg string) []string {
+	shortFlagsExist := func(s string) bool {
+		for _, c := range s[1:] {
+			if f := set.Lookup(string(c)); f == nil {
+				return false
+			}
+		}
+		return true
+	}
+
+	if !isSplittable(arg) || !shortFlagsExist(arg) {
+		return []string{arg}
+	}
+
+	separated := make([]string, 0, len(arg)-1)
+	for _, flagChar := range arg[1:] {
+		separated = append(separated, "-"+string(flagChar))
+	}
+
+	return separated
+}
+
+func isSplittable(flagArg string) bool {
+	return strings.HasPrefix(flagArg, "-") && !strings.HasPrefix(flagArg, "--") && len(flagArg) > 2
+}

vendor/github.com/urfave/cli/v2/sort.go

@@ -0,0 +1,29 @@
+package cli
+
+import "unicode"
+
+// lexicographicLess compares strings alphabetically considering case.
+func lexicographicLess(i, j string) bool {
+	iRunes := []rune(i)
+	jRunes := []rune(j)
+
+	lenShared := len(iRunes)
+	if lenShared > len(jRunes) {
+		lenShared = len(jRunes)
+	}
+
+	for index := 0; index < lenShared; index++ {
+		ir := iRunes[index]
+		jr := jRunes[index]
+
+		if lir, ljr := unicode.ToLower(ir), unicode.ToLower(jr); lir != ljr {
+			return lir < ljr
+		}
+
+		if ir != jr {
+			return ir < jr
+		}
+	}
+
+	return i < j
+}

vendor/github.com/urfave/cli/v2/template.go

@@ -0,0 +1,119 @@
+package cli
+
+// AppHelpTemplate is the text template for the Default help topic.
+// cli.go uses text/template to render templates. You can
+// render custom help text by setting this variable.
+var AppHelpTemplate = `NAME:
+   {{.Name}}{{if .Usage}} - {{.Usage}}{{end}}
+
+USAGE:
+   {{if .UsageText}}{{.UsageText}}{{else}}{{.HelpName}} {{if .VisibleFlags}}[global options]{{end}}{{if .Commands}} command [command options]{{end}} {{if .ArgsUsage}}{{.ArgsUsage}}{{else}}[arguments...]{{end}}{{end}}{{if .Version}}{{if not .HideVersion}}
+
+VERSION:
+   {{.Version}}{{end}}{{end}}{{if .Description}}
+
+DESCRIPTION:
+   {{.Description}}{{end}}{{if len .Authors}}
+
+AUTHOR{{with $length := len .Authors}}{{if ne 1 $length}}S{{end}}{{end}}:
+   {{range $index, $author := .Authors}}{{if $index}}
+   {{end}}{{$author}}{{end}}{{end}}{{if .VisibleCommands}}
+
+COMMANDS:{{range .VisibleCategories}}{{if .Name}}
+   {{.Name}}:{{range .VisibleCommands}}
+     {{join .Names ", "}}{{"\t"}}{{.Usage}}{{end}}{{else}}{{range .VisibleCommands}}
+   {{join .Names ", "}}{{"\t"}}{{.Usage}}{{end}}{{end}}{{end}}{{end}}{{if .VisibleFlags}}
+
+GLOBAL OPTIONS:
+   {{range $index, $option := .VisibleFlags}}{{if $index}}
+   {{end}}{{$option}}{{end}}{{end}}{{if .Copyright}}
+
+COPYRIGHT:
+   {{.Copyright}}{{end}}
+`
+
+// CommandHelpTemplate is the text template for the command help topic.
+// cli.go uses text/template to render templates. You can
+// render custom help text by setting this variable.
+var CommandHelpTemplate = `NAME:
+   {{.HelpName}} - {{.Usage}}
+
+USAGE:
+   {{if .UsageText}}{{.UsageText}}{{else}}{{.HelpName}}{{if .VisibleFlags}} [command options]{{end}} {{if .ArgsUsage}}{{.ArgsUsage}}{{else}}[arguments...]{{end}}{{end}}{{if .Category}}
+
+CATEGORY:
+   {{.Category}}{{end}}{{if .Description}}
+
+DESCRIPTION:
+   {{.Description}}{{end}}{{if .VisibleFlags}}
+
+OPTIONS:
+   {{range .VisibleFlags}}{{.}}
+   {{end}}{{end}}
+`
+
+// SubcommandHelpTemplate is the text template for the subcommand help topic.
+// cli.go uses text/template to render templates. You can
+// render custom help text by setting this variable.
+var SubcommandHelpTemplate = `NAME:
+   {{.HelpName}} - {{if .Description}}{{.Description}}{{else}}{{.Usage}}{{end}}
+
+USAGE:
+   {{if .UsageText}}{{.UsageText}}{{else}}{{.HelpName}} command{{if .VisibleFlags}} [command options]{{end}} {{if .ArgsUsage}}{{.ArgsUsage}}{{else}}[arguments...]{{end}}{{end}}
+
+COMMANDS:{{range .VisibleCategories}}{{if .Name}}
+   {{.Name}}:{{range .VisibleCommands}}
+     {{join .Names ", "}}{{"\t"}}{{.Usage}}{{end}}{{else}}{{range .VisibleCommands}}
+   {{join .Names ", "}}{{"\t"}}{{.Usage}}{{end}}{{end}}{{end}}{{if .VisibleFlags}}
+
+OPTIONS:
+   {{range .VisibleFlags}}{{.}}
+   {{end}}{{end}}
+`
+
+var MarkdownDocTemplate = `% {{ .App.Name }}(8){{ if .App.Description }} {{ .App.Description }}{{ end }}
+{{ range $a := .App.Authors }}
+% {{ $a }}{{ end }}
+
+# NAME
+
+{{ .App.Name }}{{ if .App.Usage }} - {{ .App.Usage }}{{ end }}
+
+# SYNOPSIS
+
+{{ .App.Name }}
+{{ if .SynopsisArgs }}
+` + "```" + `
+{{ range $v := .SynopsisArgs }}{{ $v }}{{ end }}` + "```" + `
+{{ end }}{{ if .App.UsageText }}
+# DESCRIPTION
+
+{{ .App.UsageText }}
+{{ end }}
+**Usage**:
+
+` + "```" + `
+{{ .App.Name }} [GLOBAL OPTIONS] command [COMMAND OPTIONS] [ARGUMENTS...]
+` + "```" + `
+{{ if .GlobalArgs }}
+# GLOBAL OPTIONS
+{{ range $v := .GlobalArgs }}
+{{ $v }}{{ end }}
+{{ end }}{{ if .Commands }}
+# COMMANDS
+{{ range $v := .Commands }}
+{{ $v }}{{ end }}{{ end }}`
+
+var FishCompletionTemplate = `# {{ .App.Name }} fish shell completion
+
+function __fish_{{ .App.Name }}_no_subcommand --description 'Test if there has been any subcommand yet'
+    for i in (commandline -opc)
+        if contains -- $i{{ range $v := .AllCommands }} {{ $v }}{{ end }}
+            return 1
+        end
+    end
+    return 0
+end
+
+{{ range $v := .Completions }}{{ $v }}
+{{ end }}`