Merge branch 'main' into issue_1500

.github/workflows/cli.yml

@@ -40,6 +40,8 @@ jobs:
           GFLAGS: -tags urfave_cli_no_docs
       - run: make check-binary-size
       - run: make yamlfmt
+      - if: matrix.go == '1.19.x' && matrix.os == 'ubuntu-latest'
+        run: make generate
       - run: make diffcheck
       - if: matrix.go == '1.19.x' && matrix.os == 'ubuntu-latest'
         run: make v2diff

app_test.go

@@ -177,7 +177,7 @@ func ExampleApp_Run_commandHelp() {
 	//    greet describeit - use it to see a description
 	//
 	// USAGE:
-	//    greet describeit [command options] [arguments...]
+	//    greet describeit [arguments...]
 	//
 	// DESCRIPTION:
 	//    This is how we describe describeit the function

command.go

@@ -295,6 +295,17 @@ func (c *Command) startApp(ctx *Context) error {
 	return app.RunAsSubcommand(ctx)
 }
 
+// VisibleCommands returns a slice of the Commands with Hidden=false
+func (c *Command) VisibleCommands() []*Command {
+	var ret []*Command
+	for _, command := range c.Subcommands {
+		if !command.Hidden {
+			ret = append(ret, command)
+		}
+	}
+	return ret
+}
+
 // VisibleFlagCategories returns a slice containing all the visible flag categories with the flags they contain
 func (c *Command) VisibleFlagCategories() []VisibleFlagCategory {
 	if c.flagCategories == nil {

command_test.go

@@ -422,3 +422,30 @@ func TestCommand_CanAddVFlagOnCommands(t *testing.T) {
 	err := app.Run([]string{"foo", "bar"})
 	expect(t, err, nil)
 }
+
+func TestCommand_VisibleSubcCommands(t *testing.T) {
+
+	subc1 := &Command{
+		Name:  "subc1",
+		Usage: "subc1 command1",
+	}
+	subc3 := &Command{
+		Name:  "subc3",
+		Usage: "subc3 command2",
+	}
+	c := &Command{
+		Name:  "bar",
+		Usage: "this is for testing",
+		Subcommands: []*Command{
+			subc1,
+			{
+				Name:   "subc2",
+				Usage:  "subc2 command2",
+				Hidden: true,
+			},
+			subc3,
+		},
+	}
+
+	expect(t, c.VisibleCommands(), []*Command{subc1, subc3})
+}

flag.go

@@ -129,6 +129,14 @@ type DocGenerationFlag interface {
 	GetEnvVars() []string
 }
 
+// DocGenerationSliceFlag extends DocGenerationFlag for slice-based flags.
+type DocGenerationSliceFlag interface {
+	DocGenerationFlag
+
+	// IsSliceFlag returns true for flags that can be given multiple times.
+	IsSliceFlag() bool
+}
+
 // VisibleFlag is an interface that allows to check if a flag is visible
 type VisibleFlag interface {
 	Flag
@@ -325,24 +333,13 @@ func stringifyFlag(f Flag) string {
 
 	usageWithDefault := strings.TrimSpace(usage + defaultValueString)
 
-	return withEnvHint(df.GetEnvVars(),
-		fmt.Sprintf("%s\t%s", prefixedNames(df.Names(), placeholder), usageWithDefault))
-}
-
-func stringifySliceFlag(usage string, names, defaultVals []string) string {
-	placeholder, usage := unquoteUsage(usage)
-	if placeholder == "" {
-		placeholder = defaultPlaceholder
+	pn := prefixedNames(df.Names(), placeholder)
+	sliceFlag, ok := f.(DocGenerationSliceFlag)
+	if ok && sliceFlag.IsSliceFlag() {
+		pn = pn + " [ " + pn + " ]"
 	}
 
-	defaultVal := ""
-	if len(defaultVals) > 0 {
-		defaultVal = fmt.Sprintf(formatDefault("%s"), strings.Join(defaultVals, ", "))
-	}
-
-	usageWithDefault := strings.TrimSpace(fmt.Sprintf("%s%s", usage, defaultVal))
-	pn := prefixedNames(names, placeholder)
-	return fmt.Sprintf("%s [ %s ]\t%s", pn, pn, usageWithDefault)
+	return withEnvHint(df.GetEnvVars(), fmt.Sprintf("%s\t%s", pn, usageWithDefault))
 }
 
 func hasFlag(flags []Flag, fl Flag) bool {

flag_float64_slice.go

@@ -83,7 +83,7 @@ func (f *Float64Slice) Get() interface{} {
 // String returns a readable representation of this value
 // (for usage defaults)
 func (f *Float64SliceFlag) String() string {
-	return withEnvHint(f.GetEnvVars(), f.stringify())
+	return FlagStringer(f)
 }
 
 // TakesValue returns true if the flag takes a value, otherwise false
@@ -104,10 +104,13 @@ func (f *Float64SliceFlag) GetCategory() string {
 // 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()
+	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 ""
+	return strings.Join(defaultVals, ", ")
 }
 
 // GetDefaultText returns the default text for this flag
@@ -123,6 +126,11 @@ func (f *Float64SliceFlag) GetEnvVars() []string {
 	return f.EnvVars
 }
 
+// IsSliceFlag implements DocGenerationSliceFlag.
+func (f *Float64SliceFlag) IsSliceFlag() bool {
+	return true
+}
+
 // Apply populates the flag given the flag set and environment
 func (f *Float64SliceFlag) Apply(set *flag.FlagSet) error {
 	// apply any default
@@ -169,18 +177,6 @@ func (f *Float64SliceFlag) Get(ctx *Context) []float64 {
 	return ctx.Float64Slice(f.Name)
 }
 
-func (f *Float64SliceFlag) stringify() 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)
-}
-
 // RunAction executes flag action if set
 func (f *Float64SliceFlag) RunAction(c *Context) error {
 	if f.Action != nil {

flag_generic.go

@@ -62,6 +62,10 @@ func (f *GenericFlag) Apply(set *flag.FlagSet) error {
 	}
 
 	for _, name := range f.Names() {
+		if f.Destination != nil {
+			set.Var(f.Destination, name, f.Usage)
+			continue
+		}
 		set.Var(f.Value, name, f.Usage)
 	}
 

flag_int64_slice.go

@@ -84,7 +84,7 @@ func (i *Int64Slice) Get() interface{} {
 // String returns a readable representation of this value
 // (for usage defaults)
 func (f *Int64SliceFlag) String() string {
-	return withEnvHint(f.GetEnvVars(), f.stringify())
+	return FlagStringer(f)
 }
 
 // TakesValue returns true of the flag takes a value, otherwise false
@@ -105,10 +105,13 @@ func (f *Int64SliceFlag) GetCategory() string {
 // 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()
+	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 ""
+	return strings.Join(defaultVals, ", ")
 }
 
 // GetDefaultText returns the default text for this flag
@@ -124,6 +127,11 @@ func (f *Int64SliceFlag) GetEnvVars() []string {
 	return f.EnvVars
 }
 
+// IsSliceFlag implements DocGenerationSliceFlag.
+func (f *Int64SliceFlag) IsSliceFlag() bool {
+	return true
+}
+
 // Apply populates the flag given the flag set and environment
 func (f *Int64SliceFlag) Apply(set *flag.FlagSet) error {
 	// apply any default
@@ -168,17 +176,6 @@ func (f *Int64SliceFlag) Get(ctx *Context) []int64 {
 	return ctx.Int64Slice(f.Name)
 }
 
-func (f *Int64SliceFlag) stringify() 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)
-}
-
 // RunAction executes flag action if set
 func (f *Int64SliceFlag) RunAction(c *Context) error {
 	if f.Action != nil {

flag_int_slice.go

@@ -95,7 +95,7 @@ func (i *IntSlice) Get() interface{} {
 // String returns a readable representation of this value
 // (for usage defaults)
 func (f *IntSliceFlag) String() string {
-	return withEnvHint(f.GetEnvVars(), f.stringify())
+	return FlagStringer(f)
 }
 
 // TakesValue returns true of the flag takes a value, otherwise false
@@ -116,10 +116,13 @@ func (f *IntSliceFlag) GetCategory() string {
 // 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()
+	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 ""
+	return strings.Join(defaultVals, ", ")
 }
 
 // GetDefaultText returns the default text for this flag
@@ -135,6 +138,11 @@ func (f *IntSliceFlag) GetEnvVars() []string {
 	return f.EnvVars
 }
 
+// IsSliceFlag implements DocGenerationSliceFlag.
+func (f *IntSliceFlag) IsSliceFlag() bool {
+	return true
+}
+
 // Apply populates the flag given the flag set and environment
 func (f *IntSliceFlag) Apply(set *flag.FlagSet) error {
 	// apply any default
@@ -188,17 +196,6 @@ func (f *IntSliceFlag) RunAction(c *Context) error {
 	return nil
 }
 
-func (f *IntSliceFlag) stringify() 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)
-}
-
 // IntSlice looks up the value of a local IntSliceFlag, returns
 // nil if not found
 func (cCtx *Context) IntSlice(name string) []int {

flag_string_slice.go

@@ -74,7 +74,7 @@ func (s *StringSlice) Get() interface{} {
 // String returns a readable representation of this value
 // (for usage defaults)
 func (f *StringSliceFlag) String() string {
-	return withEnvHint(f.GetEnvVars(), f.stringify())
+	return FlagStringer(f)
 }
 
 // TakesValue returns true of the flag takes a value, otherwise false
@@ -95,10 +95,15 @@ func (f *StringSliceFlag) GetCategory() string {
 // 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()
+	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 ""
+	return strings.Join(defaultVals, ", ")
 }
 
 // GetDefaultText returns the default text for this flag
@@ -114,6 +119,11 @@ func (f *StringSliceFlag) GetEnvVars() []string {
 	return f.EnvVars
 }
 
+// IsSliceFlag implements DocGenerationSliceFlag.
+func (f *StringSliceFlag) IsSliceFlag() bool {
+	return true
+}
+
 // Apply populates the flag given the flag set and environment
 func (f *StringSliceFlag) Apply(set *flag.FlagSet) error {
 	// apply any default
@@ -158,19 +168,6 @@ func (f *StringSliceFlag) Get(ctx *Context) []string {
 	return ctx.StringSlice(f.Name)
 }
 
-func (f *StringSliceFlag) stringify() 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)
-}
-
 // RunAction executes flag action if set
 func (f *StringSliceFlag) RunAction(c *Context) error {
 	if f.Action != nil {

flag_test.go

@@ -307,12 +307,12 @@ func TestFlagStringifying(t *testing.T) {
 		{
 			name:     "float64-slice-flag",
 			fl:       &Float64SliceFlag{Name: "pizzas"},
-			expected: "--pizzas value\t",
+			expected: "--pizzas value [ --pizzas value ]\t",
 		},
 		{
 			name:     "float64-slice-flag-with-default-text",
 			fl:       &Float64SliceFlag{Name: "pepperonis", DefaultText: "shaved"},
-			expected: "--pepperonis value\t(default: shaved)",
+			expected: "--pepperonis value [ --pepperonis value ]\t(default: shaved)",
 		},
 		{
 			name:     "generic-flag",
@@ -337,7 +337,7 @@ func TestFlagStringifying(t *testing.T) {
 		{
 			name:     "int-slice-flag",
 			fl:       &IntSliceFlag{Name: "pencils"},
-			expected: "--pencils value\t",
+			expected: "--pencils value [ --pencils value ]\t",
 		},
 		{
 			name:     "int-slice-flag-with-default-text",
@@ -347,7 +347,7 @@ func TestFlagStringifying(t *testing.T) {
 		{
 			name:     "uint-slice-flag",
 			fl:       &UintSliceFlag{Name: "pencils"},
-			expected: "--pencils value\t",
+			expected: "--pencils value [ --pencils value ]\t",
 		},
 		{
 			name:     "uint-slice-flag-with-default-text",
@@ -367,22 +367,22 @@ func TestFlagStringifying(t *testing.T) {
 		{
 			name:     "int64-slice-flag",
 			fl:       &Int64SliceFlag{Name: "drawers"},
-			expected: "--drawers value\t",
+			expected: "--drawers value [ --drawers value ]\t",
 		},
 		{
 			name:     "int64-slice-flag-with-default-text",
 			fl:       &Int64SliceFlag{Name: "handles", DefaultText: "-2"},
-			expected: "--handles value\t(default: -2)",
+			expected: "--handles value [ --handles value ]\t(default: -2)",
 		},
 		{
 			name:     "uint64-slice-flag",
 			fl:       &Uint64SliceFlag{Name: "drawers"},
-			expected: "--drawers value\t",
+			expected: "--drawers value [ --drawers value ]\t",
 		},
 		{
 			name:     "uint64-slice-flag-with-default-text",
 			fl:       &Uint64SliceFlag{Name: "handles", DefaultText: "-2"},
-			expected: "--handles value\t(default: -2)",
+			expected: "--handles value [ --handles value ]\t(default: -2)",
 		},
 		{
 			name:     "path-flag",
@@ -407,12 +407,12 @@ func TestFlagStringifying(t *testing.T) {
 		{
 			name:     "string-slice-flag",
 			fl:       &StringSliceFlag{Name: "meow-sounds"},
-			expected: "--meow-sounds value\t",
+			expected: "--meow-sounds value [ --meow-sounds value ]\t",
 		},
 		{
 			name:     "string-slice-flag-with-default-text",
 			fl:       &StringSliceFlag{Name: "moo-sounds", DefaultText: "awoo"},
-			expected: "--moo-sounds value\t(default: awoo)",
+			expected: "--moo-sounds value [ --moo-sounds value ]\t(default: awoo)",
 		},
 		{
 			name:     "timestamp-flag",
@@ -2724,6 +2724,53 @@ func TestParseGeneric(t *testing.T) {
 	}).Run([]string{"run", "-s", "10,20"})
 }
 
+type genericType struct {
+	s []string
+}
+
+func (g *genericType) Set(value string) error {
+	g.s = strings.Split(value, "-")
+	return nil
+}
+
+func (g *genericType) String() string {
+	return strings.Join(g.s, "-")
+}
+
+func TestParseDestinationGeneric(t *testing.T) {
+	expectedString := "abc1-123d"
+	expectedGeneric := &genericType{[]string{"abc1", "123d"}}
+	dest := &genericType{}
+
+	_ = (&App{
+		Flags: []Flag{
+			&GenericFlag{
+				Name:        "dest",
+				Destination: dest,
+			},
+		},
+		Action: func(ctx *Context) error {
+
+			if !reflect.DeepEqual(dest, expectedGeneric) {
+				t.Errorf(
+					"expected destination generic: %+v, actual: %+v",
+					expectedGeneric,
+					dest,
+				)
+			}
+
+			if dest.String() != expectedString {
+				t.Errorf(
+					"expected destination string: %s, actual: %s",
+					expectedString,
+					dest.String(),
+				)
+			}
+			return nil
+		},
+	}).Run([]string{"run", "--dest", expectedString})
+}
+
 func TestParseGenericFromEnv(t *testing.T) {
 	defer resetEnv(os.Environ())
 	os.Clearenv()

flag_uint64_slice.go

@@ -88,7 +88,7 @@ func (i *Uint64Slice) Get() interface{} {
 // String returns a readable representation of this value
 // (for usage defaults)
 func (f *Uint64SliceFlag) String() string {
-	return withEnvHint(f.GetEnvVars(), f.stringify())
+	return FlagStringer(f)
 }
 
 // TakesValue returns true of the flag takes a value, otherwise false
@@ -109,10 +109,13 @@ func (f *Uint64SliceFlag) GetCategory() string {
 // GetValue returns the flags value as string representation and an empty
 // string if the flag takes no value at all.
 func (f *Uint64SliceFlag) GetValue() string {
-	if f.Value != nil {
-		return f.Value.String()
+	var defaultVals []string
+	if f.Value != nil && len(f.Value.Value()) > 0 {
+		for _, i := range f.Value.Value() {
+			defaultVals = append(defaultVals, strconv.FormatUint(i, 10))
+		}
 	}
-	return ""
+	return strings.Join(defaultVals, ", ")
 }
 
 // GetDefaultText returns the default text for this flag
@@ -128,6 +131,11 @@ func (f *Uint64SliceFlag) GetEnvVars() []string {
 	return f.EnvVars
 }
 
+// IsSliceFlag implements DocGenerationSliceFlag.
+func (f *Uint64SliceFlag) IsSliceFlag() bool {
+	return true
+}
+
 // Apply populates the flag given the flag set and environment
 func (f *Uint64SliceFlag) Apply(set *flag.FlagSet) error {
 	// apply any default
@@ -172,17 +180,6 @@ func (f *Uint64SliceFlag) Get(ctx *Context) []uint64 {
 	return ctx.Uint64Slice(f.Name)
 }
 
-func (f *Uint64SliceFlag) stringify() string {
-	var defaultVals []string
-	if f.Value != nil && len(f.Value.Value()) > 0 {
-		for _, i := range f.Value.Value() {
-			defaultVals = append(defaultVals, strconv.FormatUint(i, 10))
-		}
-	}
-
-	return stringifySliceFlag(f.Usage, f.Names(), defaultVals)
-}
-
 // Uint64Slice looks up the value of a local Uint64SliceFlag, returns
 // nil if not found
 func (cCtx *Context) Uint64Slice(name string) []uint64 {

flag_uint_slice.go

@@ -99,7 +99,7 @@ func (i *UintSlice) Get() interface{} {
 // String returns a readable representation of this value
 // (for usage defaults)
 func (f *UintSliceFlag) String() string {
-	return withEnvHint(f.GetEnvVars(), f.stringify())
+	return FlagStringer(f)
 }
 
 // TakesValue returns true of the flag takes a value, otherwise false
@@ -120,10 +120,13 @@ func (f *UintSliceFlag) GetCategory() string {
 // GetValue returns the flags value as string representation and an empty
 // string if the flag takes no value at all.
 func (f *UintSliceFlag) GetValue() string {
-	if f.Value != nil {
-		return f.Value.String()
+	var defaultVals []string
+	if f.Value != nil && len(f.Value.Value()) > 0 {
+		for _, i := range f.Value.Value() {
+			defaultVals = append(defaultVals, strconv.FormatUint(uint64(i), 10))
+		}
 	}
-	return ""
+	return strings.Join(defaultVals, ", ")
 }
 
 // GetDefaultText returns the default text for this flag
@@ -139,6 +142,11 @@ func (f *UintSliceFlag) GetEnvVars() []string {
 	return f.EnvVars
 }
 
+// IsSliceFlag implements DocGenerationSliceFlag.
+func (f *UintSliceFlag) IsSliceFlag() bool {
+	return true
+}
+
 // Apply populates the flag given the flag set and environment
 func (f *UintSliceFlag) Apply(set *flag.FlagSet) error {
 	// apply any default
@@ -183,17 +191,6 @@ func (f *UintSliceFlag) Get(ctx *Context) []uint {
 	return ctx.UintSlice(f.Name)
 }
 
-func (f *UintSliceFlag) stringify() string {
-	var defaultVals []string
-	if f.Value != nil && len(f.Value.Value()) > 0 {
-		for _, i := range f.Value.Value() {
-			defaultVals = append(defaultVals, strconv.FormatUint(uint64(i), 10))
-		}
-	}
-
-	return stringifySliceFlag(f.Usage, f.Names(), defaultVals)
-}
-
 // UintSlice looks up the value of a local UintSliceFlag, returns
 // nil if not found
 func (cCtx *Context) UintSlice(name string) []uint {

godoc-current.txt

@@ -32,7 +32,7 @@ var (
 	SuggestDidYouMeanTemplate string             = suggestDidYouMeanTemplate
 )
 var AppHelpTemplate = `NAME:
-   {{$v := offset .Name 6}}{{wrap .Name 3}}{{if .Usage}} - {{wrap .Usage $v}}{{end}}
+   {{template "helpNameTemplate" .}}
 
 USAGE:
    {{if .UsageText}}{{wrap .UsageText 3}}{{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}}
@@ -41,52 +41,39 @@ VERSION:
    {{.Version}}{{end}}{{end}}{{if .Description}}
 
 DESCRIPTION:
-   {{wrap .Description 3}}{{end}}{{if len .Authors}}
+   {{template "descriptionTemplate" .}}{{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}}
+AUTHOR{{template "authorsTemplate" .}}{{end}}{{if .VisibleCommands}}
 
-COMMANDS:{{range .VisibleCategories}}{{if .Name}}
-   {{.Name}}:{{range .VisibleCommands}}
-     {{join .Names ", "}}{{"\t"}}{{.Usage}}{{end}}{{else}}{{ $cv := offsetCommands .VisibleCommands 5}}{{range .VisibleCommands}}
-   {{$s := join .Names ", "}}{{$s}}{{ $sp := subtract $cv (offset $s 3) }}{{ indent $sp ""}}{{wrap .Usage $cv}}{{end}}{{end}}{{end}}{{end}}{{if .VisibleFlagCategories}}
+COMMANDS:{{template "visibleCommandCategoryTemplate" .}}{{end}}{{if .VisibleFlagCategories}}
 
-GLOBAL OPTIONS:{{range .VisibleFlagCategories}}
-   {{if .Name}}{{.Name}}
-   {{end}}{{range .Flags}}{{.}}
-   {{end}}{{end}}{{else}}{{if .VisibleFlags}}
+GLOBAL OPTIONS:{{template "visibleFlagCategoryTemplate" .}}{{else if .VisibleFlags}}
 
-GLOBAL OPTIONS:
-   {{range $index, $option := .VisibleFlags}}{{if $index}}
-   {{end}}{{wrap $option.String 6}}{{end}}{{end}}{{end}}{{if .Copyright}}
+GLOBAL OPTIONS:{{template "visibleFlagTemplate" .}}{{end}}{{if .Copyright}}
 
 COPYRIGHT:
-   {{wrap .Copyright 3}}{{end}}
+   {{template "copyrightTemplate" .}}{{end}}
 `
     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 CommandHelpTemplate = `NAME:
-   {{$v := offset .HelpName 6}}{{wrap .HelpName 3}}{{if .Usage}} - {{wrap .Usage $v}}{{end}}
+   {{template "helpNameTemplate" .}}
 
 USAGE:
-   {{if .UsageText}}{{wrap .UsageText 3}}{{else}}{{.HelpName}}{{if .VisibleFlags}} [command options]{{end}} {{if .ArgsUsage}}{{.ArgsUsage}}{{else}}[arguments...]{{end}}{{end}}{{if .Category}}
+   {{template "usageTemplate" .}}{{if .Category}}
 
 CATEGORY:
    {{.Category}}{{end}}{{if .Description}}
 
 DESCRIPTION:
-   {{wrap .Description 3}}{{end}}{{if .VisibleFlagCategories}}
+   {{template "descriptionTemplate" .}}{{end}}{{if .VisibleFlagCategories}}
 
-OPTIONS:{{range .VisibleFlagCategories}}
-   {{if .Name}}{{.Name}}
-   {{end}}{{range .Flags}}{{.}}{{end}}{{end}}{{else}}{{if .VisibleFlags}}
+OPTIONS:{{template "visibleFlagCategoryTemplate" .}}{{else if .VisibleFlags}}
 
-OPTIONS:
-   {{range .VisibleFlags}}{{.}}{{end}}{{end}}{{end}}
-`
+OPTIONS:{{template "visibleFlagTemplate" .}}{{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.
@@ -145,22 +132,19 @@ var OsExiter = os.Exit
     os.Exit.
 
 var SubcommandHelpTemplate = `NAME:
-   {{.HelpName}} - {{.Usage}}
+   {{template "helpNameTemplate" .}}
 
 USAGE:
    {{if .UsageText}}{{wrap .UsageText 3}}{{else}}{{.HelpName}} command{{if .VisibleFlags}} [command options]{{end}} {{if .ArgsUsage}}{{.ArgsUsage}}{{else}}[arguments...]{{end}}{{end}}{{if .Description}}
 
 DESCRIPTION:
-   {{wrap .Description 3}}{{end}}
+   {{template "descriptionTemplate" .}}{{end}}{{if .VisibleCommands}}
 
-COMMANDS:{{range .VisibleCategories}}{{if .Name}}
-   {{.Name}}:{{range .VisibleCommands}}
-     {{join .Names ", "}}{{"\t"}}{{.Usage}}{{end}}{{else}}{{ $cv := offsetCommands .VisibleCommands 5}}{{range .VisibleCommands}}
-     {{$s := join .Names ", "}}{{$s}}{{ $sp := subtract $cv (offset $s 3) }}{{ indent $sp ""}}{{wrap .Usage $cv}}{{end}}{{end}}{{end}}{{if .VisibleFlags}}
+COMMANDS:{{template "visibleCommandTemplate" .}}{{end}}{{if .VisibleFlagCategories}}
 
-OPTIONS:
-   {{range .VisibleFlags}}{{.}}{{end}}{{end}}
-`
+OPTIONS:{{template "visibleFlagCategoryTemplate" .}}{{else if .VisibleFlags}}
+
+OPTIONS:{{template "visibleFlagTemplate" .}}{{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.
@@ -585,6 +569,9 @@ 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) VisibleCommands() []*Command
+    VisibleCommands returns a slice of the Commands with Hidden=false
+
 func (c *Command) VisibleFlagCategories() []VisibleFlagCategory
     VisibleFlagCategories returns a slice containing all the visible flag
     categories with the flags they contain
@@ -753,6 +740,14 @@ type DocGenerationFlag interface {
     DocGenerationFlag is an interface that allows documentation generation for
     the flag
 
+type DocGenerationSliceFlag interface {
+	DocGenerationFlag
+
+	// IsSliceFlag returns true for flags that can be given multiple times.
+	IsSliceFlag() bool
+}
+    DocGenerationSliceFlag extends DocGenerationFlag for slice-based flags.
+
 type DurationFlag struct {
 	Name string
 
@@ -1071,6 +1066,9 @@ func (f *Float64SliceFlag) IsRequired() bool
 func (f *Float64SliceFlag) IsSet() bool
     IsSet returns whether or not the flag has been set through env or file
 
+func (f *Float64SliceFlag) IsSliceFlag() bool
+    IsSliceFlag implements DocGenerationSliceFlag.
+
 func (f *Float64SliceFlag) IsVisible() bool
     IsVisible returns true if the flag is not hidden, otherwise false
 
@@ -1306,6 +1304,9 @@ func (f *Int64SliceFlag) IsRequired() bool
 func (f *Int64SliceFlag) IsSet() bool
     IsSet returns whether or not the flag has been set through env or file
 
+func (f *Int64SliceFlag) IsSliceFlag() bool
+    IsSliceFlag implements DocGenerationSliceFlag.
+
 func (f *Int64SliceFlag) IsVisible() bool
     IsVisible returns true if the flag is not hidden, otherwise false
 
@@ -1471,6 +1472,9 @@ func (f *IntSliceFlag) IsRequired() bool
 func (f *IntSliceFlag) IsSet() bool
     IsSet returns whether or not the flag has been set through env or file
 
+func (f *IntSliceFlag) IsSliceFlag() bool
+    IsSliceFlag implements DocGenerationSliceFlag.
+
 func (f *IntSliceFlag) IsVisible() bool
     IsVisible returns true if the flag is not hidden, otherwise false
 
@@ -1810,6 +1814,9 @@ func (f *StringSliceFlag) IsRequired() bool
 func (f *StringSliceFlag) IsSet() bool
     IsSet returns whether or not the flag has been set through env or file
 
+func (f *StringSliceFlag) IsSliceFlag() bool
+    IsSliceFlag implements DocGenerationSliceFlag.
+
 func (f *StringSliceFlag) IsVisible() bool
     IsVisible returns true if the flag is not hidden, otherwise false
 
@@ -2071,6 +2078,9 @@ func (f *Uint64SliceFlag) IsRequired() bool
 func (f *Uint64SliceFlag) IsSet() bool
     IsSet returns whether or not the flag has been set through env or file
 
+func (f *Uint64SliceFlag) IsSliceFlag() bool
+    IsSliceFlag implements DocGenerationSliceFlag.
+
 func (f *Uint64SliceFlag) IsVisible() bool
     IsVisible returns true if the flag is not hidden, otherwise false
 
@@ -2227,6 +2237,9 @@ func (f *UintSliceFlag) IsRequired() bool
 func (f *UintSliceFlag) IsSet() bool
     IsSet returns whether or not the flag has been set through env or file
 
+func (f *UintSliceFlag) IsSliceFlag() bool
+    IsSliceFlag implements DocGenerationSliceFlag.
+
 func (f *UintSliceFlag) IsVisible() bool
     IsVisible returns true if the flag is not hidden, otherwise false
 

help.go

@@ -242,7 +242,11 @@ func ShowCommandHelp(ctx *Context, command string) error {
 				c.Subcommands = append(c.Subcommands, helpCommandDontUse)
 			}
 			if !ctx.App.HideHelp && HelpFlag != nil {
-				c.appendFlag(HelpFlag)
+				if c.flagCategories == nil {
+					c.flagCategories = newFlagCategoriesFromFlags([]Flag{HelpFlag})
+				} else {
+					c.flagCategories.AddFlag("", HelpFlag)
+				}
 			}
 			templ := c.CustomHelpTemplate
 			if templ == "" {
@@ -358,6 +362,17 @@ func printHelpCustom(out io.Writer, templ string, data interface{}, customFuncs
 
 	w := tabwriter.NewWriter(out, 1, 8, 2, ' ', 0)
 	t := template.Must(template.New("help").Funcs(funcMap).Parse(templ))
+	t.New("helpNameTemplate").Parse(helpNameTemplate)
+	t.New("usageTemplate").Parse(usageTemplate)
+	t.New("descriptionTemplate").Parse(descriptionTemplate)
+	t.New("visibleCommandTemplate").Parse(visibleCommandTemplate)
+	t.New("copyrightTemplate").Parse(copyrightTemplate)
+	t.New("versionTemplate").Parse(versionTemplate)
+	t.New("visibleFlagCategoryTemplate").Parse(visibleFlagCategoryTemplate)
+	t.New("visibleFlagTemplate").Parse(visibleFlagTemplate)
+	t.New("visibleGlobalFlagCategoryTemplate").Parse(strings.Replace(visibleFlagCategoryTemplate, "OPTIONS", "GLOBAL OPTIONS", -1))
+	t.New("authorsTemplate").Parse(authorsTemplate)
+	t.New("visibleCommandCategoryTemplate").Parse(visibleCommandCategoryTemplate)
 
 	err := t.Execute(w, data)
 	if err != nil {

help_test.go

@@ -1443,3 +1443,79 @@ OPTIONS:
 			output.String(), expected)
 	}
 }
+
+func TestWrappedHelpSubcommand(t *testing.T) {
+
+	// Reset HelpPrinter after this test.
+	defer func(old helpPrinter) {
+		HelpPrinter = old
+	}(HelpPrinter)
+
+	output := new(bytes.Buffer)
+	app := &App{
+		Name:   "cli.test",
+		Writer: output,
+		Commands: []*Command{
+			{
+				Name:        "bar",
+				Aliases:     []string{"a"},
+				Usage:       "add a task to the list",
+				UsageText:   "this is an even longer way of describing adding a task to the list",
+				Description: "and a description long enough to wrap in this test case",
+				Action: func(c *Context) error {
+					return nil
+				},
+				Subcommands: []*Command{
+					{
+						Name:      "grok",
+						Usage:     "remove an existing template",
+						UsageText: "longer usage text goes here, la la la, hopefully this is long enough to wrap even more",
+						Action: func(c *Context) error {
+							return nil
+						},
+						Flags: []Flag{
+							&StringFlag{
+								Name:  "test-f",
+								Usage: "my test usage",
+							},
+						},
+					},
+				},
+			},
+		},
+	}
+
+	HelpPrinter = func(w io.Writer, templ string, data interface{}) {
+		funcMap := map[string]interface{}{
+			"wrapAt": func() int {
+				return 30
+			},
+		}
+
+		HelpPrinterCustom(w, templ, data, funcMap)
+	}
+
+	_ = app.Run([]string{"foo", "bar", "help", "grok"})
+
+	expected := `NAME:
+   cli.test bar grok - remove
+                       an
+                       existing
+                       template
+
+USAGE:
+   longer usage text goes
+   here, la la la, hopefully
+   this is long enough to wrap
+   even more
+
+OPTIONS:
+   --help, -h      show help (default: false)
+   --test-f value  my test usage
+`
+
+	if output.String() != expected {
+		t.Errorf("Unexpected wrapping, got:\n%s\nexpected: %s",
+			output.String(), expected)
+	}
+}

template.go

@@ -1,10 +1,38 @@
 package cli
 
+var helpNameTemplate = `{{$v := offset .HelpName 6}}{{wrap .HelpName 3}}{{if .Usage}} - {{wrap .Usage $v}}{{end}}`
+var usageTemplate = `{{if .UsageText}}{{wrap .UsageText 3}}{{else}}{{.HelpName}}{{if .VisibleFlags}} [command options]{{end}} {{if .ArgsUsage}}{{.ArgsUsage}}{{else}}[arguments...]{{end}}{{end}}`
+var descriptionTemplate = `{{wrap .Description 3}}`
+var authorsTemplate = `{{with $length := len .Authors}}{{if ne 1 $length}}S{{end}}{{end}}:
+   {{range $index, $author := .Authors}}{{if $index}}
+   {{end}}{{$author}}{{end}}`
+var visibleCommandTemplate = `{{ $cv := offsetCommands .VisibleCommands 5}}{{range .VisibleCommands}}
+   {{$s := join .Names ", "}}{{$s}}{{ $sp := subtract $cv (offset $s 3) }}{{ indent $sp ""}}{{wrap .Usage $cv}}{{end}}`
+var visibleCommandCategoryTemplate = `{{range .VisibleCategories}}{{if .Name}}
+   {{.Name}}:{{range .VisibleCommands}}
+     {{join .Names ", "}}{{"\t"}}{{.Usage}}{{end}}{{else}}{{template "visibleCommandTemplate" .}}{{end}}{{end}}`
+var visibleFlagCategoryTemplate = `{{range .VisibleFlagCategories}}
+   {{if .Name}}{{.Name}}
+
+   {{end}}{{$flglen := len .Flags}}{{range $i, $e := .Flags}}{{if eq (subtract $flglen $i) 1}}{{$e}}
+{{else}}{{$e}}
+   {{end}}{{end}}{{end}}`
+
+var visibleFlagTemplate = `{{range $index, $option := .VisibleFlags}}{{if $index}}{{end}}
+   {{wrap $option.String 6}}{{end}}`
+
+var versionTemplate = `{{if .Version}}{{if not .HideVersion}}
+
+VERSION:
+   {{.Version}}{{end}}{{end}}`
+
+var copyrightTemplate = `{{wrap .Copyright 3}}`
+
 // AppHelpTemplate is the text template for the Default help topic.
 // cli.go uses text/template to render templates. You can
 // render custom help text by setting this variable.
 var AppHelpTemplate = `NAME:
-   {{$v := offset .Name 6}}{{wrap .Name 3}}{{if .Usage}} - {{wrap .Usage $v}}{{end}}
+   {{template "helpNameTemplate" .}}
 
 USAGE:
    {{if .UsageText}}{{wrap .UsageText 3}}{{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}}
@@ -13,73 +41,57 @@ VERSION:
    {{.Version}}{{end}}{{end}}{{if .Description}}
 
 DESCRIPTION:
-   {{wrap .Description 3}}{{end}}{{if len .Authors}}
+   {{template "descriptionTemplate" .}}{{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}}
+AUTHOR{{template "authorsTemplate" .}}{{end}}{{if .VisibleCommands}}
 
-COMMANDS:{{range .VisibleCategories}}{{if .Name}}
-   {{.Name}}:{{range .VisibleCommands}}
-     {{join .Names ", "}}{{"\t"}}{{.Usage}}{{end}}{{else}}{{ $cv := offsetCommands .VisibleCommands 5}}{{range .VisibleCommands}}
-   {{$s := join .Names ", "}}{{$s}}{{ $sp := subtract $cv (offset $s 3) }}{{ indent $sp ""}}{{wrap .Usage $cv}}{{end}}{{end}}{{end}}{{end}}{{if .VisibleFlagCategories}}
+COMMANDS:{{template "visibleCommandCategoryTemplate" .}}{{end}}{{if .VisibleFlagCategories}}
 
-GLOBAL OPTIONS:{{range .VisibleFlagCategories}}
-   {{if .Name}}{{.Name}}
-   {{end}}{{range .Flags}}{{.}}
-   {{end}}{{end}}{{else}}{{if .VisibleFlags}}
+GLOBAL OPTIONS:{{template "visibleFlagCategoryTemplate" .}}{{else if .VisibleFlags}}
 
-GLOBAL OPTIONS:
-   {{range $index, $option := .VisibleFlags}}{{if $index}}
-   {{end}}{{wrap $option.String 6}}{{end}}{{end}}{{end}}{{if .Copyright}}
+GLOBAL OPTIONS:{{template "visibleFlagTemplate" .}}{{end}}{{if .Copyright}}
 
 COPYRIGHT:
-   {{wrap .Copyright 3}}{{end}}
+   {{template "copyrightTemplate" .}}{{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:
-   {{$v := offset .HelpName 6}}{{wrap .HelpName 3}}{{if .Usage}} - {{wrap .Usage $v}}{{end}}
+   {{template "helpNameTemplate" .}}
 
 USAGE:
-   {{if .UsageText}}{{wrap .UsageText 3}}{{else}}{{.HelpName}}{{if .VisibleFlags}} [command options]{{end}} {{if .ArgsUsage}}{{.ArgsUsage}}{{else}}[arguments...]{{end}}{{end}}{{if .Category}}
+   {{template "usageTemplate" .}}{{if .Category}}
 
 CATEGORY:
    {{.Category}}{{end}}{{if .Description}}
 
 DESCRIPTION:
-   {{wrap .Description 3}}{{end}}{{if .VisibleFlagCategories}}
+   {{template "descriptionTemplate" .}}{{end}}{{if .VisibleFlagCategories}}
 
-OPTIONS:{{range .VisibleFlagCategories}}
-   {{if .Name}}{{.Name}}
-   {{end}}{{range .Flags}}{{.}}{{end}}{{end}}{{else}}{{if .VisibleFlags}}
+OPTIONS:{{template "visibleFlagCategoryTemplate" .}}{{else if .VisibleFlags}}
 
-OPTIONS:
-   {{range .VisibleFlags}}{{.}}{{end}}{{end}}{{end}}
-`
+OPTIONS:{{template "visibleFlagTemplate" .}}{{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}} - {{.Usage}}
+   {{template "helpNameTemplate" .}}
 
 USAGE:
    {{if .UsageText}}{{wrap .UsageText 3}}{{else}}{{.HelpName}} command{{if .VisibleFlags}} [command options]{{end}} {{if .ArgsUsage}}{{.ArgsUsage}}{{else}}[arguments...]{{end}}{{end}}{{if .Description}}
 
 DESCRIPTION:
-   {{wrap .Description 3}}{{end}}
+   {{template "descriptionTemplate" .}}{{end}}{{if .VisibleCommands}}
 
-COMMANDS:{{range .VisibleCategories}}{{if .Name}}
-   {{.Name}}:{{range .VisibleCommands}}
-     {{join .Names ", "}}{{"\t"}}{{.Usage}}{{end}}{{else}}{{ $cv := offsetCommands .VisibleCommands 5}}{{range .VisibleCommands}}
-     {{$s := join .Names ", "}}{{$s}}{{ $sp := subtract $cv (offset $s 3) }}{{ indent $sp ""}}{{wrap .Usage $cv}}{{end}}{{end}}{{end}}{{if .VisibleFlags}}
+COMMANDS:{{template "visibleCommandTemplate" .}}{{end}}{{if .VisibleFlagCategories}}
 
-OPTIONS:
-   {{range .VisibleFlags}}{{.}}{{end}}{{end}}
-`
+OPTIONS:{{template "visibleFlagCategoryTemplate" .}}{{else if .VisibleFlags}}
+
+OPTIONS:{{template "visibleFlagTemplate" .}}{{end}}`
 
 var MarkdownDocTemplate = `{{if gt .SectionNum 0}}% {{ .App.Name }} {{ .SectionNum }}
 

testdata/godoc-v2.x.txt

@@ -32,7 +32,7 @@ var (
 	SuggestDidYouMeanTemplate string             = suggestDidYouMeanTemplate
 )
 var AppHelpTemplate = `NAME:
-   {{$v := offset .Name 6}}{{wrap .Name 3}}{{if .Usage}} - {{wrap .Usage $v}}{{end}}
+   {{template "helpNameTemplate" .}}
 
 USAGE:
    {{if .UsageText}}{{wrap .UsageText 3}}{{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}}
@@ -41,52 +41,39 @@ VERSION:
    {{.Version}}{{end}}{{end}}{{if .Description}}
 
 DESCRIPTION:
-   {{wrap .Description 3}}{{end}}{{if len .Authors}}
+   {{template "descriptionTemplate" .}}{{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}}
+AUTHOR{{template "authorsTemplate" .}}{{end}}{{if .VisibleCommands}}
 
-COMMANDS:{{range .VisibleCategories}}{{if .Name}}
-   {{.Name}}:{{range .VisibleCommands}}
-     {{join .Names ", "}}{{"\t"}}{{.Usage}}{{end}}{{else}}{{ $cv := offsetCommands .VisibleCommands 5}}{{range .VisibleCommands}}
-   {{$s := join .Names ", "}}{{$s}}{{ $sp := subtract $cv (offset $s 3) }}{{ indent $sp ""}}{{wrap .Usage $cv}}{{end}}{{end}}{{end}}{{end}}{{if .VisibleFlagCategories}}
+COMMANDS:{{template "visibleCommandCategoryTemplate" .}}{{end}}{{if .VisibleFlagCategories}}
 
-GLOBAL OPTIONS:{{range .VisibleFlagCategories}}
-   {{if .Name}}{{.Name}}
-   {{end}}{{range .Flags}}{{.}}
-   {{end}}{{end}}{{else}}{{if .VisibleFlags}}
+GLOBAL OPTIONS:{{template "visibleFlagCategoryTemplate" .}}{{else if .VisibleFlags}}
 
-GLOBAL OPTIONS:
-   {{range $index, $option := .VisibleFlags}}{{if $index}}
-   {{end}}{{wrap $option.String 6}}{{end}}{{end}}{{end}}{{if .Copyright}}
+GLOBAL OPTIONS:{{template "visibleFlagTemplate" .}}{{end}}{{if .Copyright}}
 
 COPYRIGHT:
-   {{wrap .Copyright 3}}{{end}}
+   {{template "copyrightTemplate" .}}{{end}}
 `
     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 CommandHelpTemplate = `NAME:
-   {{$v := offset .HelpName 6}}{{wrap .HelpName 3}}{{if .Usage}} - {{wrap .Usage $v}}{{end}}
+   {{template "helpNameTemplate" .}}
 
 USAGE:
-   {{if .UsageText}}{{wrap .UsageText 3}}{{else}}{{.HelpName}}{{if .VisibleFlags}} [command options]{{end}} {{if .ArgsUsage}}{{.ArgsUsage}}{{else}}[arguments...]{{end}}{{end}}{{if .Category}}
+   {{template "usageTemplate" .}}{{if .Category}}
 
 CATEGORY:
    {{.Category}}{{end}}{{if .Description}}
 
 DESCRIPTION:
-   {{wrap .Description 3}}{{end}}{{if .VisibleFlagCategories}}
+   {{template "descriptionTemplate" .}}{{end}}{{if .VisibleFlagCategories}}
 
-OPTIONS:{{range .VisibleFlagCategories}}
-   {{if .Name}}{{.Name}}
-   {{end}}{{range .Flags}}{{.}}{{end}}{{end}}{{else}}{{if .VisibleFlags}}
+OPTIONS:{{template "visibleFlagCategoryTemplate" .}}{{else if .VisibleFlags}}
 
-OPTIONS:
-   {{range .VisibleFlags}}{{.}}{{end}}{{end}}{{end}}
-`
+OPTIONS:{{template "visibleFlagTemplate" .}}{{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.
@@ -145,22 +132,19 @@ var OsExiter = os.Exit
     os.Exit.
 
 var SubcommandHelpTemplate = `NAME:
-   {{.HelpName}} - {{.Usage}}
+   {{template "helpNameTemplate" .}}
 
 USAGE:
    {{if .UsageText}}{{wrap .UsageText 3}}{{else}}{{.HelpName}} command{{if .VisibleFlags}} [command options]{{end}} {{if .ArgsUsage}}{{.ArgsUsage}}{{else}}[arguments...]{{end}}{{end}}{{if .Description}}
 
 DESCRIPTION:
-   {{wrap .Description 3}}{{end}}
+   {{template "descriptionTemplate" .}}{{end}}{{if .VisibleCommands}}
 
-COMMANDS:{{range .VisibleCategories}}{{if .Name}}
-   {{.Name}}:{{range .VisibleCommands}}
-     {{join .Names ", "}}{{"\t"}}{{.Usage}}{{end}}{{else}}{{ $cv := offsetCommands .VisibleCommands 5}}{{range .VisibleCommands}}
-     {{$s := join .Names ", "}}{{$s}}{{ $sp := subtract $cv (offset $s 3) }}{{ indent $sp ""}}{{wrap .Usage $cv}}{{end}}{{end}}{{end}}{{if .VisibleFlags}}
+COMMANDS:{{template "visibleCommandTemplate" .}}{{end}}{{if .VisibleFlagCategories}}
 
-OPTIONS:
-   {{range .VisibleFlags}}{{.}}{{end}}{{end}}
-`
+OPTIONS:{{template "visibleFlagCategoryTemplate" .}}{{else if .VisibleFlags}}
+
+OPTIONS:{{template "visibleFlagTemplate" .}}{{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.
@@ -585,6 +569,9 @@ 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) VisibleCommands() []*Command
+    VisibleCommands returns a slice of the Commands with Hidden=false
+
 func (c *Command) VisibleFlagCategories() []VisibleFlagCategory
     VisibleFlagCategories returns a slice containing all the visible flag
     categories with the flags they contain
@@ -753,6 +740,14 @@ type DocGenerationFlag interface {
     DocGenerationFlag is an interface that allows documentation generation for
     the flag
 
+type DocGenerationSliceFlag interface {
+	DocGenerationFlag
+
+	// IsSliceFlag returns true for flags that can be given multiple times.
+	IsSliceFlag() bool
+}
+    DocGenerationSliceFlag extends DocGenerationFlag for slice-based flags.
+
 type DurationFlag struct {
 	Name string
 
@@ -1071,6 +1066,9 @@ func (f *Float64SliceFlag) IsRequired() bool
 func (f *Float64SliceFlag) IsSet() bool
     IsSet returns whether or not the flag has been set through env or file
 
+func (f *Float64SliceFlag) IsSliceFlag() bool
+    IsSliceFlag implements DocGenerationSliceFlag.
+
 func (f *Float64SliceFlag) IsVisible() bool
     IsVisible returns true if the flag is not hidden, otherwise false
 
@@ -1306,6 +1304,9 @@ func (f *Int64SliceFlag) IsRequired() bool
 func (f *Int64SliceFlag) IsSet() bool
     IsSet returns whether or not the flag has been set through env or file
 
+func (f *Int64SliceFlag) IsSliceFlag() bool
+    IsSliceFlag implements DocGenerationSliceFlag.
+
 func (f *Int64SliceFlag) IsVisible() bool
     IsVisible returns true if the flag is not hidden, otherwise false
 
@@ -1471,6 +1472,9 @@ func (f *IntSliceFlag) IsRequired() bool
 func (f *IntSliceFlag) IsSet() bool
     IsSet returns whether or not the flag has been set through env or file
 
+func (f *IntSliceFlag) IsSliceFlag() bool
+    IsSliceFlag implements DocGenerationSliceFlag.
+
 func (f *IntSliceFlag) IsVisible() bool
     IsVisible returns true if the flag is not hidden, otherwise false
 
@@ -1810,6 +1814,9 @@ func (f *StringSliceFlag) IsRequired() bool
 func (f *StringSliceFlag) IsSet() bool
     IsSet returns whether or not the flag has been set through env or file
 
+func (f *StringSliceFlag) IsSliceFlag() bool
+    IsSliceFlag implements DocGenerationSliceFlag.
+
 func (f *StringSliceFlag) IsVisible() bool
     IsVisible returns true if the flag is not hidden, otherwise false
 
@@ -2071,6 +2078,9 @@ func (f *Uint64SliceFlag) IsRequired() bool
 func (f *Uint64SliceFlag) IsSet() bool
     IsSet returns whether or not the flag has been set through env or file
 
+func (f *Uint64SliceFlag) IsSliceFlag() bool
+    IsSliceFlag implements DocGenerationSliceFlag.
+
 func (f *Uint64SliceFlag) IsVisible() bool
     IsVisible returns true if the flag is not hidden, otherwise false
 
@@ -2227,6 +2237,9 @@ func (f *UintSliceFlag) IsRequired() bool
 func (f *UintSliceFlag) IsSet() bool
     IsSet returns whether or not the flag has been set through env or file
 
+func (f *UintSliceFlag) IsSliceFlag() bool
+    IsSliceFlag implements DocGenerationSliceFlag.
+
 func (f *UintSliceFlag) IsVisible() bool
     IsVisible returns true if the flag is not hidden, otherwise false