Merge pull request #1368 from urfave/michaeljs1990-add-flag-category-support

Add flag category support (#796)

app.go

@@ -52,6 +52,8 @@ type App struct {
 	HideVersion bool
 	// categories contains the categorized commands and is populated on app startup
 	categories CommandCategories
+	// flagCategories contains the categorized flags and is populated on app startup
+	flagCategories FlagCategories
 	// 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
@@ -183,6 +185,8 @@ func (a *App) Setup() {
 		if c.HelpName == "" {
 			c.HelpName = fmt.Sprintf("%s %s", a.HelpName, c.Name)
 		}
+
+		c.flagCategories = newFlagCategoriesFromFlags(c.Flags)
 		newCommands = append(newCommands, c)
 	}
 	a.Commands = newCommands
@@ -207,6 +211,13 @@ func (a *App) Setup() {
 	}
 	sort.Sort(a.categories.(*commandCategories))
 
+	a.flagCategories = newFlagCategories()
+	for _, fl := range a.Flags {
+		if cf, ok := fl.(CategorizableFlag); ok {
+			a.flagCategories.AddFlag(cf.GetCategory(), cf)
+		}
+	}
+
 	if a.Metadata == nil {
 		a.Metadata = make(map[string]interface{})
 	}
@@ -493,6 +504,14 @@ func (a *App) VisibleCommands() []*Command {
 	return ret
 }
 
+// VisibleFlagCategories returns a slice containing all the categories with the flags they contain
+func (a *App) VisibleFlagCategories() []VisibleFlagCategory {
+	if a.flagCategories == nil {
+		return []VisibleFlagCategory{}
+	}
+	return a.flagCategories.VisibleCategories()
+}
+
 // VisibleFlags returns a slice of the Flags with Hidden=false
 func (a *App) VisibleFlags() []Flag {
 	return visibleFlags(a.Flags)

app_test.go

@@ -142,8 +142,8 @@ func ExampleApp_Run_appHelp() {
 	//    help, h        Shows a list of commands or help for one command
 	//
 	// GLOBAL OPTIONS:
-	//    --name value   a name to say (default: "bob")
 	//    --help, -h     show help (default: false)
+	//    --name value   a name to say (default: "bob")
 	//    --version, -v  print the version (default: false)
 }
 
@@ -1927,6 +1927,14 @@ func TestApp_VisibleCategories(t *testing.T) {
 	expect(t, []CommandCategory{}, app.VisibleCategories())
 }
 
+func TestApp_VisibleFlagCategories(t *testing.T) {
+	app := &App{}
+	vfc := app.VisibleFlagCategories()
+	if len(vfc) != 0 {
+		t.Errorf("unexpected visible flag categories %+v", vfc)
+	}
+}
+
 func TestApp_Run_DoesNotOverwriteErrorFromBefore(t *testing.T) {
 	app := &App{
 		Action: func(c *Context) error { return nil },

category.go

@@ -1,10 +1,12 @@
 package cli
 
+import "sort"
+
 // 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 returns a slice of categories sorted by name
 	Categories() []CommandCategory
 }
 
@@ -77,3 +79,93 @@ func (c *commandCategory) VisibleCommands() []*Command {
 	}
 	return ret
 }
+
+// FlagCategories interface allows for category manipulation
+type FlagCategories interface {
+	// AddFlags adds a flag to a category, creating a new category if necessary.
+	AddFlag(category string, fl Flag)
+	// VisibleCategories returns a slice of visible flag categories sorted by name
+	VisibleCategories() []VisibleFlagCategory
+}
+
+type defaultFlagCategories struct {
+	m map[string]*defaultVisibleFlagCategory
+}
+
+func newFlagCategories() FlagCategories {
+	return &defaultFlagCategories{
+		m: map[string]*defaultVisibleFlagCategory{},
+	}
+}
+
+func newFlagCategoriesFromFlags(fs []Flag) FlagCategories {
+	fc := newFlagCategories()
+	for _, fl := range fs {
+		if cf, ok := fl.(CategorizableFlag); ok {
+			fc.AddFlag(cf.GetCategory(), cf)
+		}
+	}
+
+	return fc
+}
+
+func (f *defaultFlagCategories) AddFlag(category string, fl Flag) {
+	if _, ok := f.m[category]; !ok {
+		f.m[category] = &defaultVisibleFlagCategory{name: category, m: map[string]Flag{}}
+	}
+
+	f.m[category].m[fl.String()] = fl
+}
+
+func (f *defaultFlagCategories) VisibleCategories() []VisibleFlagCategory {
+	catNames := []string{}
+	for name := range f.m {
+		catNames = append(catNames, name)
+	}
+
+	sort.Strings(catNames)
+
+	ret := make([]VisibleFlagCategory, len(catNames))
+	for i, name := range catNames {
+		ret[i] = f.m[name]
+	}
+
+	return ret
+}
+
+// VisibleFlagCategory is a category containing flags.
+type VisibleFlagCategory interface {
+	// Name returns the category name string
+	Name() string
+	// Flags returns a slice of VisibleFlag sorted by name
+	Flags() []VisibleFlag
+}
+
+type defaultVisibleFlagCategory struct {
+	name string
+	m    map[string]Flag
+}
+
+func (fc *defaultVisibleFlagCategory) Name() string {
+	return fc.name
+}
+
+func (fc *defaultVisibleFlagCategory) Flags() []VisibleFlag {
+	vfNames := []string{}
+	for flName, fl := range fc.m {
+		if vf, ok := fl.(VisibleFlag); ok {
+			if vf.IsVisible() {
+				vfNames = append(vfNames, flName)
+			}
+		}
+	}
+
+	sort.Strings(vfNames)
+
+	ret := make([]VisibleFlag, len(vfNames))
+	for i, flName := range vfNames {
+		ret[i] = fc.m[flName].(VisibleFlag)
+	}
+
+	return ret
+}

command.go

@@ -38,7 +38,8 @@ type Command struct {
 	// List of child commands
 	Subcommands []*Command
 	// List of flags to parse
-	Flags []Flag
+	Flags          []Flag
+	flagCategories FlagCategories
 	// Treat all flags as normal arguments if true
 	SkipFlagParsing bool
 	// Boolean to hide built-in help command and help flag
@@ -286,6 +287,14 @@ func (c *Command) startApp(ctx *Context) error {
 	return app.RunAsSubcommand(ctx)
 }
 
+// VisibleFlagCategories returns a slice containing all the visible flag categories with the flags they contain
+func (c *Command) VisibleFlagCategories() []VisibleFlagCategory {
+	if c.flagCategories == nil {
+		return []VisibleFlagCategory{}
+	}
+	return c.flagCategories.VisibleCategories()
+}
+
 // VisibleFlags returns a slice of the Flags with Hidden=false
 func (c *Command) VisibleFlags() []Flag {
 	return visibleFlags(c.Flags)

flag.go

@@ -132,6 +132,14 @@ type VisibleFlag interface {
 	IsVisible() bool
 }
 
+// CategorizableFlag is an interface that allows us to potentially
+// use a flag in a categorized representation.
+type CategorizableFlag interface {
+	VisibleFlag
+
+	GetCategory() string
+}
+
 func flagSet(name string, flags []Flag) (*flag.FlagSet, error) {
 	set := flag.NewFlagSet(name, flag.ContinueOnError)
 

flag_bool.go

@@ -16,6 +16,11 @@ func (f *BoolFlag) GetUsage() string {
 	return f.Usage
 }
 
+// GetCategory returns the category for the flag
+func (f *BoolFlag) GetCategory() string {
+	return f.Category
+}
+
 // 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 {

flag_duration.go

@@ -16,6 +16,11 @@ func (f *DurationFlag) GetUsage() string {
 	return f.Usage
 }
 
+// GetCategory returns the category for the flag
+func (f *DurationFlag) GetCategory() string {
+	return f.Category
+}
+
 // 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 {

flag_float64.go

@@ -16,6 +16,11 @@ func (f *Float64Flag) GetUsage() string {
 	return f.Usage
 }
 
+// GetCategory returns the category for the flag
+func (f *Float64Flag) GetCategory() string {
+	return f.Category
+}
+
 // 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 {

flag_float64_slice.go

@@ -91,6 +91,11 @@ func (f *Float64SliceFlag) GetUsage() string {
 	return f.Usage
 }
 
+// GetCategory returns the category for the flag
+func (f *Float64SliceFlag) GetCategory() string {
+	return f.Category
+}
+
 // 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 {

flag_generic.go

@@ -21,6 +21,11 @@ func (f *GenericFlag) GetUsage() string {
 	return f.Usage
 }
 
+// GetCategory returns the category for the flag
+func (f *GenericFlag) GetCategory() string {
+	return f.Category
+}
+
 // 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 {

flag_int.go

@@ -16,6 +16,11 @@ func (f *IntFlag) GetUsage() string {
 	return f.Usage
 }
 
+// GetCategory returns the category for the flag
+func (f *IntFlag) GetCategory() string {
+	return f.Category
+}
+
 // 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 {

flag_int64.go

@@ -16,6 +16,11 @@ func (f *Int64Flag) GetUsage() string {
 	return f.Usage
 }
 
+// GetCategory returns the category for the flag
+func (f *Int64Flag) GetCategory() string {
+	return f.Category
+}
+
 // 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 {

flag_int64_slice.go

@@ -88,10 +88,15 @@ func (f *Int64SliceFlag) TakesValue() bool {
 }
 
 // GetUsage returns the usage string for the flag
-func (f Int64SliceFlag) GetUsage() string {
+func (f *Int64SliceFlag) GetUsage() string {
 	return f.Usage
 }
 
+// GetCategory returns the category for the flag
+func (f *Int64SliceFlag) GetCategory() string {
+	return f.Category
+}
+
 // 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 {

flag_int_slice.go

@@ -99,10 +99,15 @@ func (f *IntSliceFlag) TakesValue() bool {
 }
 
 // GetUsage returns the usage string for the flag
-func (f IntSliceFlag) GetUsage() string {
+func (f *IntSliceFlag) GetUsage() string {
 	return f.Usage
 }
 
+// GetCategory returns the category for the flag
+func (f *IntSliceFlag) GetCategory() string {
+	return f.Category
+}
+
 // 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 {

flag_path.go

@@ -17,6 +17,11 @@ func (f *PathFlag) GetUsage() string {
 	return f.Usage
 }
 
+// GetCategory returns the category for the flag
+func (f *PathFlag) GetCategory() string {
+	return f.Category
+}
+
 // 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 {

flag_string.go

@@ -15,6 +15,11 @@ func (f *StringFlag) GetUsage() string {
 	return f.Usage
 }
 
+// GetCategory returns the category for the flag
+func (f *StringFlag) GetCategory() string {
+	return f.Category
+}
+
 // 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 {

flag_string_slice.go

@@ -86,6 +86,11 @@ func (f *StringSliceFlag) GetUsage() string {
 	return f.Usage
 }
 
+// GetCategory returns the category for the flag
+func (f *StringSliceFlag) GetCategory() string {
+	return f.Category
+}
+
 // 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 {

flag_timestamp.go

@@ -68,6 +68,11 @@ func (f *TimestampFlag) GetUsage() string {
 	return f.Usage
 }
 
+// GetCategory returns the category for the flag
+func (f *TimestampFlag) GetCategory() string {
+	return f.Category
+}
+
 // 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 {

flag_uint.go

@@ -16,6 +16,11 @@ func (f *UintFlag) GetUsage() string {
 	return f.Usage
 }
 
+// GetCategory returns the category for the flag
+func (f *UintFlag) GetCategory() string {
+	return f.Category
+}
+
 // Apply populates the flag given the flag set and environment
 func (f *UintFlag) Apply(set *flag.FlagSet) error {
 	if val, source, found := flagFromEnvOrFile(f.EnvVars, f.FilePath); found {

flag_uint64.go

@@ -16,6 +16,11 @@ func (f *Uint64Flag) GetUsage() string {
 	return f.Usage
 }
 
+// GetCategory returns the category for the flag
+func (f *Uint64Flag) GetCategory() string {
+	return f.Category
+}
+
 // Apply populates the flag given the flag set and environment
 func (f *Uint64Flag) Apply(set *flag.FlagSet) error {
 	if val, source, found := flagFromEnvOrFile(f.EnvVars, f.FilePath); found {

godoc-current.txt

@@ -45,11 +45,16 @@ AUTHOR{{with $length := len .Authors}}{{if ne 1 $length}}S{{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}}{{end}}{{if .VisibleFlags}}
+   {{join .Names ", "}}{{"\t"}}{{.Usage}}{{end}}{{end}}{{end}}{{end}}{{if .VisibleFlagCategories}}
+
+GLOBAL OPTIONS:{{range .VisibleFlagCategories}}
+   {{if .Name}}{{.Name}}
+   {{end}}{{range .Flags}}{{.}}
+   {{end}}{{end}}{{else}}{{if .VisibleFlags}}
 
 GLOBAL OPTIONS:
    {{range $index, $option := .VisibleFlags}}{{if $index}}
-   {{end}}{{$option}}{{end}}{{end}}{{if .Copyright}}
+   {{end}}{{$option}}{{end}}{{end}}{{end}}{{if .Copyright}}
 
 COPYRIGHT:
    {{.Copyright}}{{end}}
@@ -68,11 +73,16 @@ CATEGORY:
    {{.Category}}{{end}}{{if .Description}}
 
 DESCRIPTION:
-   {{.Description | nindent 3 | trim}}{{end}}{{if .VisibleFlags}}
+   {{.Description | nindent 3 | trim}}{{end}}{{if .VisibleFlagCategories}}
+
+OPTIONS:{{range .VisibleFlagCategories}}
+   {{if .Name}}{{.Name}}
+   {{end}}{{range .Flags}}{{.}}
+   {{end}}{{end}}{{else}}{{if .VisibleFlags}}
 
 OPTIONS:
    {{range .VisibleFlags}}{{.}}
-   {{end}}{{end}}
+   {{end}}{{end}}{{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
@@ -369,6 +379,10 @@ func (a *App) VisibleCategories() []CommandCategory
 func (a *App) VisibleCommands() []*Command
     VisibleCommands returns a slice of the Commands with Hidden=false
 
+func (a *App) VisibleFlagCategories() []VisibleFlagCategory
+    VisibleFlagCategories returns a slice containing all the categories with the
+    flags they contain
+
 func (a *App) VisibleFlags() []Flag
     VisibleFlags returns a slice of the Flags with Hidden=false
 
@@ -409,6 +423,7 @@ type BeforeFunc func(*Context) error
 type BoolFlag struct {
 	Name string
 
+	Category    string
 	DefaultText string
 	FilePath    string
 	Usage       string
@@ -431,6 +446,9 @@ func (f *BoolFlag) Apply(set *flag.FlagSet) error
 func (f *BoolFlag) Get(ctx *Context) bool
     Get returns the flag’s value in the given Context.
 
+func (f *BoolFlag) GetCategory() string
+    GetCategory returns the category for the flag
+
 func (f *BoolFlag) GetDefaultText() string
     GetDefaultText returns the default text for this flag
 
@@ -462,6 +480,14 @@ func (f *BoolFlag) String() string
 func (f *BoolFlag) TakesValue() bool
     TakesValue returns true of the flag takes a value, otherwise false
 
+type CategorizableFlag interface {
+	VisibleFlag
+
+	GetCategory() string
+}
+    CategorizableFlag is an interface that allows us to potentially use a flag
+    in a categorized representation.
+
 type Command struct {
 	// The name of the command
 	Name string
@@ -493,6 +519,7 @@ type Command struct {
 	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 and help flag
@@ -532,13 +559,17 @@ func (c *Command) Run(ctx *Context) (err error)
     Run invokes the command given the context, parses ctx.Args() to generate
     command-specific flags
 
+func (c *Command) VisibleFlagCategories() []VisibleFlagCategory
+    VisibleFlagCategories returns a slice containing all the visible flag
+    categories with the flags they contain
+
 func (c *Command) VisibleFlags() []Flag
     VisibleFlags returns a slice of the Flags with Hidden=false
 
 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 returns a slice of categories sorted by name
 	Categories() []CommandCategory
 }
     CommandCategories interface allows for category manipulation
@@ -682,6 +713,7 @@ type DocGenerationFlag interface {
 type DurationFlag struct {
 	Name string
 
+	Category    string
 	DefaultText string
 	FilePath    string
 	Usage       string
@@ -704,6 +736,9 @@ func (f *DurationFlag) Apply(set *flag.FlagSet) error
 func (f *DurationFlag) Get(ctx *Context) time.Duration
     Get returns the flag’s value in the given Context.
 
+func (f *DurationFlag) GetCategory() string
+    GetCategory returns the category for the flag
+
 func (f *DurationFlag) GetDefaultText() string
     GetDefaultText returns the default text for this flag
 
@@ -799,6 +834,14 @@ var VersionFlag Flag = &BoolFlag{
 }
     VersionFlag prints the version for the application
 
+type FlagCategories interface {
+	// AddFlags adds a flag to a category, creating a new category if necessary.
+	AddFlag(category string, fl Flag)
+	// VisibleCategories returns a slice of visible flag categories sorted by name
+	VisibleCategories() []VisibleFlagCategory
+}
+    FlagCategories interface allows for category manipulation
+
 type FlagEnvHintFunc func(envVars []string, str string) string
     FlagEnvHintFunc is used by the default FlagStringFunc to annotate flag help
     with the environment variable details.
@@ -843,6 +886,7 @@ func (f FlagsByName) Swap(i, j int)
 type Float64Flag struct {
 	Name string
 
+	Category    string
 	DefaultText string
 	FilePath    string
 	Usage       string
@@ -865,6 +909,9 @@ func (f *Float64Flag) Apply(set *flag.FlagSet) error
 func (f *Float64Flag) Get(ctx *Context) float64
     Get returns the flag’s value in the given Context.
 
+func (f *Float64Flag) GetCategory() string
+    GetCategory returns the category for the flag
+
 func (f *Float64Flag) GetDefaultText() string
     GetDefaultText returns the default text for this flag
 
@@ -922,6 +969,7 @@ func (f *Float64Slice) Value() []float64
 type Float64SliceFlag struct {
 	Name string
 
+	Category    string
 	DefaultText string
 	FilePath    string
 	Usage       string
@@ -944,6 +992,9 @@ func (f *Float64SliceFlag) Apply(set *flag.FlagSet) error
 func (f *Float64SliceFlag) Get(ctx *Context) []float64
     Get returns the flag’s value in the given Context.
 
+func (f *Float64SliceFlag) GetCategory() string
+    GetCategory returns the category for the flag
+
 func (f *Float64SliceFlag) GetDefaultText() string
     GetDefaultText returns the default text for this flag
 
@@ -984,6 +1035,7 @@ type Generic interface {
 type GenericFlag struct {
 	Name string
 
+	Category    string
 	DefaultText string
 	FilePath    string
 	Usage       string
@@ -1009,6 +1061,9 @@ func (f GenericFlag) Apply(set *flag.FlagSet) error
 func (f *GenericFlag) Get(ctx *Context) interface{}
     Get returns the flag’s value in the given Context.
 
+func (f *GenericFlag) GetCategory() string
+    GetCategory returns the category for the flag
+
 func (f *GenericFlag) GetDefaultText() string
     GetDefaultText returns the default text for this flag
 
@@ -1043,6 +1098,7 @@ func (f *GenericFlag) TakesValue() bool
 type Int64Flag struct {
 	Name string
 
+	Category    string
 	DefaultText string
 	FilePath    string
 	Usage       string
@@ -1065,6 +1121,9 @@ func (f *Int64Flag) Apply(set *flag.FlagSet) error
 func (f *Int64Flag) Get(ctx *Context) int64
     Get returns the flag’s value in the given Context.
 
+func (f *Int64Flag) GetCategory() string
+    GetCategory returns the category for the flag
+
 func (f *Int64Flag) GetDefaultText() string
     GetDefaultText returns the default text for this flag
 
@@ -1122,6 +1181,7 @@ func (i *Int64Slice) Value() []int64
 type Int64SliceFlag struct {
 	Name string
 
+	Category    string
 	DefaultText string
 	FilePath    string
 	Usage       string
@@ -1144,13 +1204,16 @@ func (f *Int64SliceFlag) Apply(set *flag.FlagSet) error
 func (f *Int64SliceFlag) Get(ctx *Context) []int64
     Get returns the flag’s value in the given Context.
 
+func (f *Int64SliceFlag) GetCategory() string
+    GetCategory returns the category for the flag
+
 func (f *Int64SliceFlag) GetDefaultText() string
     GetDefaultText returns the default text for this flag
 
 func (f *Int64SliceFlag) GetEnvVars() []string
     GetEnvVars returns the env vars for this flag
 
-func (f Int64SliceFlag) GetUsage() string
+func (f *Int64SliceFlag) GetUsage() string
     GetUsage returns the usage string for the flag
 
 func (f *Int64SliceFlag) GetValue() string
@@ -1178,6 +1241,7 @@ func (f *Int64SliceFlag) TakesValue() bool
 type IntFlag struct {
 	Name string
 
+	Category    string
 	DefaultText string
 	FilePath    string
 	Usage       string
@@ -1200,6 +1264,9 @@ func (f *IntFlag) Apply(set *flag.FlagSet) error
 func (f *IntFlag) Get(ctx *Context) int
     Get returns the flag’s value in the given Context.
 
+func (f *IntFlag) GetCategory() string
+    GetCategory returns the category for the flag
+
 func (f *IntFlag) GetDefaultText() string
     GetDefaultText returns the default text for this flag
 
@@ -1261,6 +1328,7 @@ func (i *IntSlice) Value() []int
 type IntSliceFlag struct {
 	Name string
 
+	Category    string
 	DefaultText string
 	FilePath    string
 	Usage       string
@@ -1283,13 +1351,16 @@ func (f *IntSliceFlag) Apply(set *flag.FlagSet) error
 func (f *IntSliceFlag) Get(ctx *Context) []int
     Get returns the flag’s value in the given Context.
 
+func (f *IntSliceFlag) GetCategory() string
+    GetCategory returns the category for the flag
+
 func (f *IntSliceFlag) GetDefaultText() string
     GetDefaultText returns the default text for this flag
 
 func (f *IntSliceFlag) GetEnvVars() []string
     GetEnvVars returns the env vars for this flag
 
-func (f IntSliceFlag) GetUsage() string
+func (f *IntSliceFlag) GetUsage() string
     GetUsage returns the usage string for the flag
 
 func (f *IntSliceFlag) GetValue() string
@@ -1331,6 +1402,7 @@ type Path = string
 type PathFlag struct {
 	Name string
 
+	Category    string
 	DefaultText string
 	FilePath    string
 	Usage       string
@@ -1355,6 +1427,9 @@ func (f *PathFlag) Apply(set *flag.FlagSet) error
 func (f *PathFlag) Get(ctx *Context) string
     Get returns the flag’s value in the given Context.
 
+func (f *PathFlag) GetCategory() string
+    GetCategory returns the category for the flag
+
 func (f *PathFlag) GetDefaultText() string
     GetDefaultText returns the default text for this flag
 
@@ -1403,6 +1478,7 @@ type Serializer interface {
 type StringFlag struct {
 	Name string
 
+	Category    string
 	DefaultText string
 	FilePath    string
 	Usage       string
@@ -1427,6 +1503,9 @@ func (f *StringFlag) Apply(set *flag.FlagSet) error
 func (f *StringFlag) Get(ctx *Context) string
     Get returns the flag’s value in the given Context.
 
+func (f *StringFlag) GetCategory() string
+    GetCategory returns the category for the flag
+
 func (f *StringFlag) GetDefaultText() string
     GetDefaultText returns the default text for this flag
 
@@ -1484,6 +1563,7 @@ func (s *StringSlice) Value() []string
 type StringSliceFlag struct {
 	Name string
 
+	Category    string
 	DefaultText string
 	FilePath    string
 	Usage       string
@@ -1508,6 +1588,9 @@ func (f *StringSliceFlag) Apply(set *flag.FlagSet) error
 func (f *StringSliceFlag) Get(ctx *Context) []string
     Get returns the flag’s value in the given Context.
 
+func (f *StringSliceFlag) GetCategory() string
+    GetCategory returns the category for the flag
+
 func (f *StringSliceFlag) GetDefaultText() string
     GetDefaultText returns the default text for this flag
 
@@ -1568,6 +1651,7 @@ func (t *Timestamp) Value() *time.Time
 type TimestampFlag struct {
 	Name string
 
+	Category    string
 	DefaultText string
 	FilePath    string
 	Usage       string
@@ -1592,6 +1676,9 @@ func (f *TimestampFlag) Apply(set *flag.FlagSet) error
 func (f *TimestampFlag) Get(ctx *Context) *time.Time
     Get returns the flag’s value in the given Context.
 
+func (f *TimestampFlag) GetCategory() string
+    GetCategory returns the category for the flag
+
 func (f *TimestampFlag) GetDefaultText() string
     GetDefaultText returns the default text for this flag
 
@@ -1626,6 +1713,7 @@ func (f *TimestampFlag) TakesValue() bool
 type Uint64Flag struct {
 	Name string
 
+	Category    string
 	DefaultText string
 	FilePath    string
 	Usage       string
@@ -1648,6 +1736,9 @@ func (f *Uint64Flag) Apply(set *flag.FlagSet) error
 func (f *Uint64Flag) Get(ctx *Context) uint64
     Get returns the flag’s value in the given Context.
 
+func (f *Uint64Flag) GetCategory() string
+    GetCategory returns the category for the flag
+
 func (f *Uint64Flag) GetDefaultText() string
     GetDefaultText returns the default text for this flag
 
@@ -1682,6 +1773,7 @@ func (f *Uint64Flag) TakesValue() bool
 type UintFlag struct {
 	Name string
 
+	Category    string
 	DefaultText string
 	FilePath    string
 	Usage       string
@@ -1704,6 +1796,9 @@ func (f *UintFlag) Apply(set *flag.FlagSet) error
 func (f *UintFlag) Get(ctx *Context) uint
     Get returns the flag’s value in the given Context.
 
+func (f *UintFlag) GetCategory() string
+    GetCategory returns the category for the flag
+
 func (f *UintFlag) GetDefaultText() string
     GetDefaultText returns the default text for this flag
 
@@ -1743,6 +1838,14 @@ type VisibleFlag interface {
 }
     VisibleFlag is an interface that allows to check if a flag is visible
 
+type VisibleFlagCategory interface {
+	// Name returns the category name string
+	Name() string
+	// Flags returns a slice of VisibleFlag sorted by name
+	Flags() []VisibleFlag
+}
+    VisibleFlagCategory is a category containing flags.
+
 package altsrc // import "github.com/urfave/cli/v2/altsrc"
 
 

internal/genflags/generated.gotmpl

@@ -7,6 +7,7 @@ package {{.PackageName}}
 type {{.TypeName}} struct {
   Name string
 
+  Category string
   DefaultText string
   FilePath string
   Usage string

template.go

@@ -22,11 +22,16 @@ AUTHOR{{with $length := len .Authors}}{{if ne 1 $length}}S{{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}}{{end}}{{if .VisibleFlags}}
+   {{join .Names ", "}}{{"\t"}}{{.Usage}}{{end}}{{end}}{{end}}{{end}}{{if .VisibleFlagCategories}}
+
+GLOBAL OPTIONS:{{range .VisibleFlagCategories}}
+   {{if .Name}}{{.Name}}
+   {{end}}{{range .Flags}}{{.}}
+   {{end}}{{end}}{{else}}{{if .VisibleFlags}}
 
 GLOBAL OPTIONS:
    {{range $index, $option := .VisibleFlags}}{{if $index}}
-   {{end}}{{$option}}{{end}}{{end}}{{if .Copyright}}
+   {{end}}{{$option}}{{end}}{{end}}{{end}}{{if .Copyright}}
 
 COPYRIGHT:
    {{.Copyright}}{{end}}
@@ -45,11 +50,16 @@ CATEGORY:
    {{.Category}}{{end}}{{if .Description}}
 
 DESCRIPTION:
-   {{.Description | nindent 3 | trim}}{{end}}{{if .VisibleFlags}}
+   {{.Description | nindent 3 | trim}}{{end}}{{if .VisibleFlagCategories}}
+
+OPTIONS:{{range .VisibleFlagCategories}}
+   {{if .Name}}{{.Name}}
+   {{end}}{{range .Flags}}{{.}}
+   {{end}}{{end}}{{else}}{{if .VisibleFlags}}
 
 OPTIONS:
    {{range .VisibleFlags}}{{.}}
-   {{end}}{{end}}
+   {{end}}{{end}}{{end}}
 `
 
 // SubcommandHelpTemplate is the text template for the subcommand help topic.

testdata/godoc-v2.x.txt

@@ -45,11 +45,16 @@ AUTHOR{{with $length := len .Authors}}{{if ne 1 $length}}S{{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}}{{end}}{{if .VisibleFlags}}
+   {{join .Names ", "}}{{"\t"}}{{.Usage}}{{end}}{{end}}{{end}}{{end}}{{if .VisibleFlagCategories}}
+
+GLOBAL OPTIONS:{{range .VisibleFlagCategories}}
+   {{if .Name}}{{.Name}}
+   {{end}}{{range .Flags}}{{.}}
+   {{end}}{{end}}{{else}}{{if .VisibleFlags}}
 
 GLOBAL OPTIONS:
    {{range $index, $option := .VisibleFlags}}{{if $index}}
-   {{end}}{{$option}}{{end}}{{end}}{{if .Copyright}}
+   {{end}}{{$option}}{{end}}{{end}}{{end}}{{if .Copyright}}
 
 COPYRIGHT:
    {{.Copyright}}{{end}}
@@ -68,11 +73,16 @@ CATEGORY:
    {{.Category}}{{end}}{{if .Description}}
 
 DESCRIPTION:
-   {{.Description | nindent 3 | trim}}{{end}}{{if .VisibleFlags}}
+   {{.Description | nindent 3 | trim}}{{end}}{{if .VisibleFlagCategories}}
+
+OPTIONS:{{range .VisibleFlagCategories}}
+   {{if .Name}}{{.Name}}
+   {{end}}{{range .Flags}}{{.}}
+   {{end}}{{end}}{{else}}{{if .VisibleFlags}}
 
 OPTIONS:
    {{range .VisibleFlags}}{{.}}
-   {{end}}{{end}}
+   {{end}}{{end}}{{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
@@ -369,6 +379,10 @@ func (a *App) VisibleCategories() []CommandCategory
 func (a *App) VisibleCommands() []*Command
     VisibleCommands returns a slice of the Commands with Hidden=false
 
+func (a *App) VisibleFlagCategories() []VisibleFlagCategory
+    VisibleFlagCategories returns a slice containing all the categories with the
+    flags they contain
+
 func (a *App) VisibleFlags() []Flag
     VisibleFlags returns a slice of the Flags with Hidden=false
 
@@ -409,6 +423,7 @@ type BeforeFunc func(*Context) error
 type BoolFlag struct {
 	Name string
 
+	Category    string
 	DefaultText string
 	FilePath    string
 	Usage       string
@@ -431,6 +446,9 @@ func (f *BoolFlag) Apply(set *flag.FlagSet) error
 func (f *BoolFlag) Get(ctx *Context) bool
     Get returns the flag’s value in the given Context.
 
+func (f *BoolFlag) GetCategory() string
+    GetCategory returns the category for the flag
+
 func (f *BoolFlag) GetDefaultText() string
     GetDefaultText returns the default text for this flag
 
@@ -462,6 +480,14 @@ func (f *BoolFlag) String() string
 func (f *BoolFlag) TakesValue() bool
     TakesValue returns true of the flag takes a value, otherwise false
 
+type CategorizableFlag interface {
+	VisibleFlag
+
+	GetCategory() string
+}
+    CategorizableFlag is an interface that allows us to potentially use a flag
+    in a categorized representation.
+
 type Command struct {
 	// The name of the command
 	Name string
@@ -493,6 +519,7 @@ type Command struct {
 	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 and help flag
@@ -532,13 +559,17 @@ func (c *Command) Run(ctx *Context) (err error)
     Run invokes the command given the context, parses ctx.Args() to generate
     command-specific flags
 
+func (c *Command) VisibleFlagCategories() []VisibleFlagCategory
+    VisibleFlagCategories returns a slice containing all the visible flag
+    categories with the flags they contain
+
 func (c *Command) VisibleFlags() []Flag
     VisibleFlags returns a slice of the Flags with Hidden=false
 
 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 returns a slice of categories sorted by name
 	Categories() []CommandCategory
 }
     CommandCategories interface allows for category manipulation
@@ -682,6 +713,7 @@ type DocGenerationFlag interface {
 type DurationFlag struct {
 	Name string
 
+	Category    string
 	DefaultText string
 	FilePath    string
 	Usage       string
@@ -704,6 +736,9 @@ func (f *DurationFlag) Apply(set *flag.FlagSet) error
 func (f *DurationFlag) Get(ctx *Context) time.Duration
     Get returns the flag’s value in the given Context.
 
+func (f *DurationFlag) GetCategory() string
+    GetCategory returns the category for the flag
+
 func (f *DurationFlag) GetDefaultText() string
     GetDefaultText returns the default text for this flag
 
@@ -799,6 +834,14 @@ var VersionFlag Flag = &BoolFlag{
 }
     VersionFlag prints the version for the application
 
+type FlagCategories interface {
+	// AddFlags adds a flag to a category, creating a new category if necessary.
+	AddFlag(category string, fl Flag)
+	// VisibleCategories returns a slice of visible flag categories sorted by name
+	VisibleCategories() []VisibleFlagCategory
+}
+    FlagCategories interface allows for category manipulation
+
 type FlagEnvHintFunc func(envVars []string, str string) string
     FlagEnvHintFunc is used by the default FlagStringFunc to annotate flag help
     with the environment variable details.
@@ -843,6 +886,7 @@ func (f FlagsByName) Swap(i, j int)
 type Float64Flag struct {
 	Name string
 
+	Category    string
 	DefaultText string
 	FilePath    string
 	Usage       string
@@ -865,6 +909,9 @@ func (f *Float64Flag) Apply(set *flag.FlagSet) error
 func (f *Float64Flag) Get(ctx *Context) float64
     Get returns the flag’s value in the given Context.
 
+func (f *Float64Flag) GetCategory() string
+    GetCategory returns the category for the flag
+
 func (f *Float64Flag) GetDefaultText() string
     GetDefaultText returns the default text for this flag
 
@@ -922,6 +969,7 @@ func (f *Float64Slice) Value() []float64
 type Float64SliceFlag struct {
 	Name string
 
+	Category    string
 	DefaultText string
 	FilePath    string
 	Usage       string
@@ -944,6 +992,9 @@ func (f *Float64SliceFlag) Apply(set *flag.FlagSet) error
 func (f *Float64SliceFlag) Get(ctx *Context) []float64
     Get returns the flag’s value in the given Context.
 
+func (f *Float64SliceFlag) GetCategory() string
+    GetCategory returns the category for the flag
+
 func (f *Float64SliceFlag) GetDefaultText() string
     GetDefaultText returns the default text for this flag
 
@@ -984,6 +1035,7 @@ type Generic interface {
 type GenericFlag struct {
 	Name string
 
+	Category    string
 	DefaultText string
 	FilePath    string
 	Usage       string
@@ -1009,6 +1061,9 @@ func (f GenericFlag) Apply(set *flag.FlagSet) error
 func (f *GenericFlag) Get(ctx *Context) interface{}
     Get returns the flag’s value in the given Context.
 
+func (f *GenericFlag) GetCategory() string
+    GetCategory returns the category for the flag
+
 func (f *GenericFlag) GetDefaultText() string
     GetDefaultText returns the default text for this flag
 
@@ -1043,6 +1098,7 @@ func (f *GenericFlag) TakesValue() bool
 type Int64Flag struct {
 	Name string
 
+	Category    string
 	DefaultText string
 	FilePath    string
 	Usage       string
@@ -1065,6 +1121,9 @@ func (f *Int64Flag) Apply(set *flag.FlagSet) error
 func (f *Int64Flag) Get(ctx *Context) int64
     Get returns the flag’s value in the given Context.
 
+func (f *Int64Flag) GetCategory() string
+    GetCategory returns the category for the flag
+
 func (f *Int64Flag) GetDefaultText() string
     GetDefaultText returns the default text for this flag
 
@@ -1122,6 +1181,7 @@ func (i *Int64Slice) Value() []int64
 type Int64SliceFlag struct {
 	Name string
 
+	Category    string
 	DefaultText string
 	FilePath    string
 	Usage       string
@@ -1144,13 +1204,16 @@ func (f *Int64SliceFlag) Apply(set *flag.FlagSet) error
 func (f *Int64SliceFlag) Get(ctx *Context) []int64
     Get returns the flag’s value in the given Context.
 
+func (f *Int64SliceFlag) GetCategory() string
+    GetCategory returns the category for the flag
+
 func (f *Int64SliceFlag) GetDefaultText() string
     GetDefaultText returns the default text for this flag
 
 func (f *Int64SliceFlag) GetEnvVars() []string
     GetEnvVars returns the env vars for this flag
 
-func (f Int64SliceFlag) GetUsage() string
+func (f *Int64SliceFlag) GetUsage() string
     GetUsage returns the usage string for the flag
 
 func (f *Int64SliceFlag) GetValue() string
@@ -1178,6 +1241,7 @@ func (f *Int64SliceFlag) TakesValue() bool
 type IntFlag struct {
 	Name string
 
+	Category    string
 	DefaultText string
 	FilePath    string
 	Usage       string
@@ -1200,6 +1264,9 @@ func (f *IntFlag) Apply(set *flag.FlagSet) error
 func (f *IntFlag) Get(ctx *Context) int
     Get returns the flag’s value in the given Context.
 
+func (f *IntFlag) GetCategory() string
+    GetCategory returns the category for the flag
+
 func (f *IntFlag) GetDefaultText() string
     GetDefaultText returns the default text for this flag
 
@@ -1261,6 +1328,7 @@ func (i *IntSlice) Value() []int
 type IntSliceFlag struct {
 	Name string
 
+	Category    string
 	DefaultText string
 	FilePath    string
 	Usage       string
@@ -1283,13 +1351,16 @@ func (f *IntSliceFlag) Apply(set *flag.FlagSet) error
 func (f *IntSliceFlag) Get(ctx *Context) []int
     Get returns the flag’s value in the given Context.
 
+func (f *IntSliceFlag) GetCategory() string
+    GetCategory returns the category for the flag
+
 func (f *IntSliceFlag) GetDefaultText() string
     GetDefaultText returns the default text for this flag
 
 func (f *IntSliceFlag) GetEnvVars() []string
     GetEnvVars returns the env vars for this flag
 
-func (f IntSliceFlag) GetUsage() string
+func (f *IntSliceFlag) GetUsage() string
     GetUsage returns the usage string for the flag
 
 func (f *IntSliceFlag) GetValue() string
@@ -1331,6 +1402,7 @@ type Path = string
 type PathFlag struct {
 	Name string
 
+	Category    string
 	DefaultText string
 	FilePath    string
 	Usage       string
@@ -1355,6 +1427,9 @@ func (f *PathFlag) Apply(set *flag.FlagSet) error
 func (f *PathFlag) Get(ctx *Context) string
     Get returns the flag’s value in the given Context.
 
+func (f *PathFlag) GetCategory() string
+    GetCategory returns the category for the flag
+
 func (f *PathFlag) GetDefaultText() string
     GetDefaultText returns the default text for this flag
 
@@ -1403,6 +1478,7 @@ type Serializer interface {
 type StringFlag struct {
 	Name string
 
+	Category    string
 	DefaultText string
 	FilePath    string
 	Usage       string
@@ -1427,6 +1503,9 @@ func (f *StringFlag) Apply(set *flag.FlagSet) error
 func (f *StringFlag) Get(ctx *Context) string
     Get returns the flag’s value in the given Context.
 
+func (f *StringFlag) GetCategory() string
+    GetCategory returns the category for the flag
+
 func (f *StringFlag) GetDefaultText() string
     GetDefaultText returns the default text for this flag
 
@@ -1484,6 +1563,7 @@ func (s *StringSlice) Value() []string
 type StringSliceFlag struct {
 	Name string
 
+	Category    string
 	DefaultText string
 	FilePath    string
 	Usage       string
@@ -1508,6 +1588,9 @@ func (f *StringSliceFlag) Apply(set *flag.FlagSet) error
 func (f *StringSliceFlag) Get(ctx *Context) []string
     Get returns the flag’s value in the given Context.
 
+func (f *StringSliceFlag) GetCategory() string
+    GetCategory returns the category for the flag
+
 func (f *StringSliceFlag) GetDefaultText() string
     GetDefaultText returns the default text for this flag
 
@@ -1568,6 +1651,7 @@ func (t *Timestamp) Value() *time.Time
 type TimestampFlag struct {
 	Name string
 
+	Category    string
 	DefaultText string
 	FilePath    string
 	Usage       string
@@ -1592,6 +1676,9 @@ func (f *TimestampFlag) Apply(set *flag.FlagSet) error
 func (f *TimestampFlag) Get(ctx *Context) *time.Time
     Get returns the flag’s value in the given Context.
 
+func (f *TimestampFlag) GetCategory() string
+    GetCategory returns the category for the flag
+
 func (f *TimestampFlag) GetDefaultText() string
     GetDefaultText returns the default text for this flag
 
@@ -1626,6 +1713,7 @@ func (f *TimestampFlag) TakesValue() bool
 type Uint64Flag struct {
 	Name string
 
+	Category    string
 	DefaultText string
 	FilePath    string
 	Usage       string
@@ -1648,6 +1736,9 @@ func (f *Uint64Flag) Apply(set *flag.FlagSet) error
 func (f *Uint64Flag) Get(ctx *Context) uint64
     Get returns the flag’s value in the given Context.
 
+func (f *Uint64Flag) GetCategory() string
+    GetCategory returns the category for the flag
+
 func (f *Uint64Flag) GetDefaultText() string
     GetDefaultText returns the default text for this flag
 
@@ -1682,6 +1773,7 @@ func (f *Uint64Flag) TakesValue() bool
 type UintFlag struct {
 	Name string
 
+	Category    string
 	DefaultText string
 	FilePath    string
 	Usage       string
@@ -1704,6 +1796,9 @@ func (f *UintFlag) Apply(set *flag.FlagSet) error
 func (f *UintFlag) Get(ctx *Context) uint
     Get returns the flag’s value in the given Context.
 
+func (f *UintFlag) GetCategory() string
+    GetCategory returns the category for the flag
+
 func (f *UintFlag) GetDefaultText() string
     GetDefaultText returns the default text for this flag
 
@@ -1743,6 +1838,14 @@ type VisibleFlag interface {
 }
     VisibleFlag is an interface that allows to check if a flag is visible
 
+type VisibleFlagCategory interface {
+	// Name returns the category name string
+	Name() string
+	// Flags returns a slice of VisibleFlag sorted by name
+	Flags() []VisibleFlag
+}
+    VisibleFlagCategory is a category containing flags.
+
 package altsrc // import "github.com/urfave/cli/v2/altsrc"
 
 

zz_generated.flags.go

@@ -8,6 +8,7 @@ import "time"
 type Float64SliceFlag struct {
 	Name string
 
+	Category    string
 	DefaultText string
 	FilePath    string
 	Usage       string
@@ -47,6 +48,7 @@ func (f *Float64SliceFlag) IsVisible() bool {
 type GenericFlag struct {
 	Name string
 
+	Category    string
 	DefaultText string
 	FilePath    string
 	Usage       string
@@ -93,6 +95,7 @@ func (f *GenericFlag) IsVisible() bool {
 type Int64SliceFlag struct {
 	Name string
 
+	Category    string
 	DefaultText string
 	FilePath    string
 	Usage       string
@@ -132,6 +135,7 @@ func (f *Int64SliceFlag) IsVisible() bool {
 type IntSliceFlag struct {
 	Name string
 
+	Category    string
 	DefaultText string
 	FilePath    string
 	Usage       string
@@ -171,6 +175,7 @@ func (f *IntSliceFlag) IsVisible() bool {
 type PathFlag struct {
 	Name string
 
+	Category    string
 	DefaultText string
 	FilePath    string
 	Usage       string
@@ -217,6 +222,7 @@ func (f *PathFlag) IsVisible() bool {
 type StringSliceFlag struct {
 	Name string
 
+	Category    string
 	DefaultText string
 	FilePath    string
 	Usage       string
@@ -258,6 +264,7 @@ func (f *StringSliceFlag) IsVisible() bool {
 type TimestampFlag struct {
 	Name string
 
+	Category    string
 	DefaultText string
 	FilePath    string
 	Usage       string
@@ -304,6 +311,7 @@ func (f *TimestampFlag) IsVisible() bool {
 type BoolFlag struct {
 	Name string
 
+	Category    string
 	DefaultText string
 	FilePath    string
 	Usage       string
@@ -348,6 +356,7 @@ func (f *BoolFlag) IsVisible() bool {
 type Float64Flag struct {
 	Name string
 
+	Category    string
 	DefaultText string
 	FilePath    string
 	Usage       string
@@ -392,6 +401,7 @@ func (f *Float64Flag) IsVisible() bool {
 type IntFlag struct {
 	Name string
 
+	Category    string
 	DefaultText string
 	FilePath    string
 	Usage       string
@@ -436,6 +446,7 @@ func (f *IntFlag) IsVisible() bool {
 type Int64Flag struct {
 	Name string
 
+	Category    string
 	DefaultText string
 	FilePath    string
 	Usage       string
@@ -480,6 +491,7 @@ func (f *Int64Flag) IsVisible() bool {
 type StringFlag struct {
 	Name string
 
+	Category    string
 	DefaultText string
 	FilePath    string
 	Usage       string
@@ -526,6 +538,7 @@ func (f *StringFlag) IsVisible() bool {
 type DurationFlag struct {
 	Name string
 
+	Category    string
 	DefaultText string
 	FilePath    string
 	Usage       string
@@ -570,6 +583,7 @@ func (f *DurationFlag) IsVisible() bool {
 type UintFlag struct {
 	Name string
 
+	Category    string
 	DefaultText string
 	FilePath    string
 	Usage       string
@@ -614,6 +628,7 @@ func (f *UintFlag) IsVisible() bool {
 type Uint64Flag struct {
 	Name string
 
+	Category    string
 	DefaultText string
 	FilePath    string
 	Usage       string