Merge branch 'master' of https://github.com/ogier/pflag

Conflicts:
	flag.go

1 files changed, 20 insertions, 540 deletions

diff --git a/flag.go b/flag.go
index b741e7b..0af452d 100644
--- a/flag.go
+++ b/flag.go
@@ -105,148 +105,12 @@ import (
 	"io"
 	"os"
 	"sort"
-	"strconv"
 	"strings"
-	"time"
 )
 
 // ErrHelp is the error returned if the flag -help is invoked but no such flag is defined.
 var ErrHelp = errors.New("pflag: help requested")
 
-// -- bool Value
-type boolValue bool
-
-func newBoolValue(val bool, p *bool) *boolValue {
-	*p = val
-	return (*boolValue)(p)
-}
-
-func (b *boolValue) Set(s string) error {
-	v, err := strconv.ParseBool(s)
-	*b = boolValue(v)
-	return err
-}
-
-func (b *boolValue) String() string { return fmt.Sprintf("%v", *b) }
-
-// -- int Value
-type intValue int
-
-func newIntValue(val int, p *int) *intValue {
-	*p = val
-	return (*intValue)(p)
-}
-
-func (i *intValue) Set(s string) error {
-	v, err := strconv.ParseInt(s, 0, 64)
-	*i = intValue(v)
-	return err
-}
-
-func (i *intValue) String() string { return fmt.Sprintf("%v", *i) }
-
-// -- int64 Value
-type int64Value int64
-
-func newInt64Value(val int64, p *int64) *int64Value {
-	*p = val
-	return (*int64Value)(p)
-}
-
-func (i *int64Value) Set(s string) error {
-	v, err := strconv.ParseInt(s, 0, 64)
-	*i = int64Value(v)
-	return err
-}
-
-func (i *int64Value) String() string { return fmt.Sprintf("%v", *i) }
-
-// -- uint Value
-type uintValue uint
-
-func newUintValue(val uint, p *uint) *uintValue {
-	*p = val
-	return (*uintValue)(p)
-}
-
-func (i *uintValue) Set(s string) error {
-	v, err := strconv.ParseUint(s, 0, 64)
-	*i = uintValue(v)
-	return err
-}
-
-func (i *uintValue) String() string { return fmt.Sprintf("%v", *i) }
-
-// -- uint64 Value
-type uint64Value uint64
-
-func newUint64Value(val uint64, p *uint64) *uint64Value {
-	*p = val
-	return (*uint64Value)(p)
-}
-
-func (i *uint64Value) Set(s string) error {
-	v, err := strconv.ParseUint(s, 0, 64)
-	*i = uint64Value(v)
-	return err
-}
-
-func (i *uint64Value) String() string { return fmt.Sprintf("%v", *i) }
-
-// -- string Value
-type stringValue string
-
-func newStringValue(val string, p *string) *stringValue {
-	*p = val
-	return (*stringValue)(p)
-}
-
-func (s *stringValue) Set(val string) error {
-	*s = stringValue(val)
-	return nil
-}
-
-func (s *stringValue) String() string { return fmt.Sprintf("%s", *s) }
-
-// -- float64 Value
-type float64Value float64
-
-func newFloat64Value(val float64, p *float64) *float64Value {
-	*p = val
-	return (*float64Value)(p)
-}
-
-func (f *float64Value) Set(s string) error {
-	v, err := strconv.ParseFloat(s, 64)
-	*f = float64Value(v)
-	return err
-}
-
-func (f *float64Value) String() string { return fmt.Sprintf("%v", *f) }
-
-// -- time.Duration Value
-type durationValue time.Duration
-
-func newDurationValue(val time.Duration, p *time.Duration) *durationValue {
-	*p = val
-	return (*durationValue)(p)
-}
-
-func (d *durationValue) Set(s string) error {
-	v, err := time.ParseDuration(s)
-	*d = durationValue(v)
-	return err
-}
-
-func (d *durationValue) String() string { return (*time.Duration)(d).String() }
-
-// Value is the interface to the dynamic value stored in a flag.
-// (The default value is represented as a string.)
-type Value interface {
-	String() string
-	Set(string) error
-}
-
 // ErrorHandling defines how to handle flag parsing errors.
 type ErrorHandling int
 
@@ -329,7 +193,7 @@ func (f *FlagSet) HasFlags() bool {
 // VisitAll visits the command-line flags in lexicographical order, calling
 // fn for each.  It visits all flags, even those not set.
 func VisitAll(fn func(*Flag)) {
-	commandLine.VisitAll(fn)
+	CommandLine.VisitAll(fn)
 }
 
 // Visit visits the flags in lexicographical order, calling fn for each.
@@ -343,7 +207,7 @@ func (f *FlagSet) Visit(fn func(*Flag)) {
 // Visit visits the command-line flags in lexicographical order, calling fn
 // for each.  It visits only those flags that have been set.
 func Visit(fn func(*Flag)) {
-	commandLine.Visit(fn)
+	CommandLine.Visit(fn)
 }
 
 // Lookup returns the Flag structure of the named flag, returning nil if none exists.
@@ -354,7 +218,7 @@ func (f *FlagSet) Lookup(name string) *Flag {
 // Lookup returns the Flag structure of the named command-line flag,
 // returning nil if none exists.
 func Lookup(name string) *Flag {
-	return commandLine.formal[name]
+	return CommandLine.formal[name]
 }
 
 // Set sets the value of the named flag.
@@ -377,7 +241,7 @@ func (f *FlagSet) Set(name, value string) error {
 
 // Set sets the value of the named command-line flag.
 func Set(name, value string) error {
-	return commandLine.Set(name, value)
+	return CommandLine.Set(name, value)
 }
 
 // PrintDefaults prints, to standard error unless configured
@@ -420,7 +284,7 @@ func (f *FlagSet) FlagUsages() string {
 
 // PrintDefaults prints to standard error the default values of all defined command-line flags.
 func PrintDefaults() {
-	commandLine.PrintDefaults()
+	CommandLine.PrintDefaults()
 }
 
 // defaultUsage is the default function to print a usage message.
@@ -429,7 +293,7 @@ func defaultUsage(f *FlagSet) {
 	f.PrintDefaults()
 }
 
-// NOTE: Usage is not just defaultUsage(commandLine)
+// NOTE: Usage is not just defaultUsage(CommandLine)
 // because it serves (via godoc flag Usage) as the example
 // for how to write your own usage function.
 
@@ -444,7 +308,7 @@ var Usage = func() {
 func (f *FlagSet) NFlag() int { return len(f.actual) }
 
 // NFlag returns the number of command-line flags that have been set.
-func NFlag() int { return len(commandLine.actual) }
+func NFlag() int { return len(CommandLine.actual) }
 
 // Arg returns the i'th argument.  Arg(0) is the first remaining argument
 // after flags have been processed.
@@ -458,404 +322,20 @@ func (f *FlagSet) Arg(i int) string {
 // Arg returns the i'th command-line argument.  Arg(0) is the first remaining argument
 // after flags have been processed.
 func Arg(i int) string {
-	return commandLine.Arg(i)
+	return CommandLine.Arg(i)
 }
 
 // NArg is the number of arguments remaining after flags have been processed.
 func (f *FlagSet) NArg() int { return len(f.args) }
 
 // NArg is the number of arguments remaining after flags have been processed.
-func NArg() int { return len(commandLine.args) }
+func NArg() int { return len(CommandLine.args) }
 
 // Args returns the non-flag arguments.
 func (f *FlagSet) Args() []string { return f.args }
 
 // Args returns the non-flag command-line arguments.
-func Args() []string { return commandLine.args }
-
-// BoolVar defines a bool flag with specified name, default value, and usage string.
-// The argument p points to a bool variable in which to store the value of the flag.
-func (f *FlagSet) BoolVar(p *bool, name string, value bool, usage string) {
-	f.VarP(newBoolValue(value, p), name, "", usage)
-}
-
-// Like BoolVar, but accepts a shorthand letter that can be used after a single dash.
-func (f *FlagSet) BoolVarP(p *bool, name, shorthand string, value bool, usage string) {
-	f.VarP(newBoolValue(value, p), name, shorthand, usage)
-}
-
-// BoolVar defines a bool flag with specified name, default value, and usage string.
-// The argument p points to a bool variable in which to store the value of the flag.
-func BoolVar(p *bool, name string, value bool, usage string) {
-	commandLine.VarP(newBoolValue(value, p), name, "", usage)
-}
-
-// Like BoolVar, but accepts a shorthand letter that can be used after a single dash.
-func BoolVarP(p *bool, name, shorthand string, value bool, usage string) {
-	commandLine.VarP(newBoolValue(value, p), name, shorthand, usage)
-}
-
-// Bool defines a bool flag with specified name, default value, and usage string.
-// The return value is the address of a bool variable that stores the value of the flag.
-func (f *FlagSet) Bool(name string, value bool, usage string) *bool {
-	p := new(bool)
-	f.BoolVarP(p, name, "", value, usage)
-	return p
-}
-
-// Like Bool, but accepts a shorthand letter that can be used after a single dash.
-func (f *FlagSet) BoolP(name, shorthand string, value bool, usage string) *bool {
-	p := new(bool)
-	f.BoolVarP(p, name, shorthand, value, usage)
-	return p
-}
-
-// Bool defines a bool flag with specified name, default value, and usage string.
-// The return value is the address of a bool variable that stores the value of the flag.
-func Bool(name string, value bool, usage string) *bool {
-	return commandLine.BoolP(name, "", value, usage)
-}
-
-// Like Bool, but accepts a shorthand letter that can be used after a single dash.
-func BoolP(name, shorthand string, value bool, usage string) *bool {
-	return commandLine.BoolP(name, shorthand, value, usage)
-}
-
-// IntVar defines an int flag with specified name, default value, and usage string.
-// The argument p points to an int variable in which to store the value of the flag.
-func (f *FlagSet) IntVar(p *int, name string, value int, usage string) {
-	f.VarP(newIntValue(value, p), name, "", usage)
-}
-
-// Like IntVar, but accepts a shorthand letter that can be used after a single dash.
-func (f *FlagSet) IntVarP(p *int, name, shorthand string, value int, usage string) {
-	f.VarP(newIntValue(value, p), name, shorthand, usage)
-}
-
-// IntVar defines an int flag with specified name, default value, and usage string.
-// The argument p points to an int variable in which to store the value of the flag.
-func IntVar(p *int, name string, value int, usage string) {
-	commandLine.VarP(newIntValue(value, p), name, "", usage)
-}
-
-// Like IntVar, but accepts a shorthand letter that can be used after a single dash.
-func IntVarP(p *int, name, shorthand string, value int, usage string) {
-	commandLine.VarP(newIntValue(value, p), name, shorthand, usage)
-}
-
-// Int defines an int flag with specified name, default value, and usage string.
-// The return value is the address of an int variable that stores the value of the flag.
-func (f *FlagSet) Int(name string, value int, usage string) *int {
-	p := new(int)
-	f.IntVarP(p, name, "", value, usage)
-	return p
-}
-
-// Like Int, but accepts a shorthand letter that can be used after a single dash.
-func (f *FlagSet) IntP(name, shorthand string, value int, usage string) *int {
-	p := new(int)
-	f.IntVarP(p, name, shorthand, value, usage)
-	return p
-}
-
-// Int defines an int flag with specified name, default value, and usage string.
-// The return value is the address of an int variable that stores the value of the flag.
-func Int(name string, value int, usage string) *int {
-	return commandLine.IntP(name, "", value, usage)
-}
-
-// Like Int, but accepts a shorthand letter that can be used after a single dash.
-func IntP(name, shorthand string, value int, usage string) *int {
-	return commandLine.IntP(name, shorthand, value, usage)
-}
-
-// Int64Var defines an int64 flag with specified name, default value, and usage string.
-// The argument p points to an int64 variable in which to store the value of the flag.
-func (f *FlagSet) Int64Var(p *int64, name string, value int64, usage string) {
-	f.VarP(newInt64Value(value, p), name, "", usage)
-}
-
-// Like Int64Var, but accepts a shorthand letter that can be used after a single dash.
-func (f *FlagSet) Int64VarP(p *int64, name, shorthand string, value int64, usage string) {
-	f.VarP(newInt64Value(value, p), name, shorthand, usage)
-}
-
-// Int64Var defines an int64 flag with specified name, default value, and usage string.
-// The argument p points to an int64 variable in which to store the value of the flag.
-func Int64Var(p *int64, name string, value int64, usage string) {
-	commandLine.VarP(newInt64Value(value, p), name, "", usage)
-}
-
-// Like Int64Var, but accepts a shorthand letter that can be used after a single dash.
-func Int64VarP(p *int64, name, shorthand string, value int64, usage string) {
-	commandLine.VarP(newInt64Value(value, p), name, shorthand, usage)
-}
-
-// Int64 defines an int64 flag with specified name, default value, and usage string.
-// The return value is the address of an int64 variable that stores the value of the flag.
-func (f *FlagSet) Int64(name string, value int64, usage string) *int64 {
-	p := new(int64)
-	f.Int64VarP(p, name, "", value, usage)
-	return p
-}
-
-// Like Int64, but accepts a shorthand letter that can be used after a single dash.
-func (f *FlagSet) Int64P(name, shorthand string, value int64, usage string) *int64 {
-	p := new(int64)
-	f.Int64VarP(p, name, shorthand, value, usage)
-	return p
-}
-
-// Int64 defines an int64 flag with specified name, default value, and usage string.
-// The return value is the address of an int64 variable that stores the value of the flag.
-func Int64(name string, value int64, usage string) *int64 {
-	return commandLine.Int64P(name, "", value, usage)
-}
-
-// Like Int64, but accepts a shorthand letter that can be used after a single dash.
-func Int64P(name, shorthand string, value int64, usage string) *int64 {
-	return commandLine.Int64P(name, shorthand, value, usage)
-}
-
-// UintVar defines a uint flag with specified name, default value, and usage string.
-// The argument p points to a uint variable in which to store the value of the flag.
-func (f *FlagSet) UintVar(p *uint, name string, value uint, usage string) {
-	f.VarP(newUintValue(value, p), name, "", usage)
-}
-
-// Like UintVar, but accepts a shorthand letter that can be used after a single dash.
-func (f *FlagSet) UintVarP(p *uint, name, shorthand string, value uint, usage string) {
-	f.VarP(newUintValue(value, p), name, shorthand, usage)
-}
-
-// UintVar defines a uint flag with specified name, default value, and usage string.
-// The argument p points to a uint  variable in which to store the value of the flag.
-func UintVar(p *uint, name string, value uint, usage string) {
-	commandLine.VarP(newUintValue(value, p), name, "", usage)
-}
-
-// Like UintVar, but accepts a shorthand letter that can be used after a single dash.
-func UintVarP(p *uint, name, shorthand string, value uint, usage string) {
-	commandLine.VarP(newUintValue(value, p), name, shorthand, usage)
-}
-
-// Uint defines a uint flag with specified name, default value, and usage string.
-// The return value is the address of a uint  variable that stores the value of the flag.
-func (f *FlagSet) Uint(name string, value uint, usage string) *uint {
-	p := new(uint)
-	f.UintVarP(p, name, "", value, usage)
-	return p
-}
-
-// Like Uint, but accepts a shorthand letter that can be used after a single dash.
-func (f *FlagSet) UintP(name, shorthand string, value uint, usage string) *uint {
-	p := new(uint)
-	f.UintVarP(p, name, shorthand, value, usage)
-	return p
-}
-
-// Uint defines a uint flag with specified name, default value, and usage string.
-// The return value is the address of a uint  variable that stores the value of the flag.
-func Uint(name string, value uint, usage string) *uint {
-	return commandLine.UintP(name, "", value, usage)
-}
-
-// Like Uint, but accepts a shorthand letter that can be used after a single dash.
-func UintP(name, shorthand string, value uint, usage string) *uint {
-	return commandLine.UintP(name, shorthand, value, usage)
-}
-
-// Uint64Var defines a uint64 flag with specified name, default value, and usage string.
-// The argument p points to a uint64 variable in which to store the value of the flag.
-func (f *FlagSet) Uint64Var(p *uint64, name string, value uint64, usage string) {
-	f.VarP(newUint64Value(value, p), name, "", usage)
-}
-
-// Like Uint64Var, but accepts a shorthand letter that can be used after a single dash.
-func (f *FlagSet) Uint64VarP(p *uint64, name, shorthand string, value uint64, usage string) {
-	f.VarP(newUint64Value(value, p), name, shorthand, usage)
-}
-
-// Uint64Var defines a uint64 flag with specified name, default value, and usage string.
-// The argument p points to a uint64 variable in which to store the value of the flag.
-func Uint64Var(p *uint64, name string, value uint64, usage string) {
-	commandLine.VarP(newUint64Value(value, p), name, "", usage)
-}
-
-// Like Uint64Var, but accepts a shorthand letter that can be used after a single dash.
-func Uint64VarP(p *uint64, name, shorthand string, value uint64, usage string) {
-	commandLine.VarP(newUint64Value(value, p), name, shorthand, usage)
-}
-
-// Uint64 defines a uint64 flag with specified name, default value, and usage string.
-// The return value is the address of a uint64 variable that stores the value of the flag.
-func (f *FlagSet) Uint64(name string, value uint64, usage string) *uint64 {
-	p := new(uint64)
-	f.Uint64VarP(p, name, "", value, usage)
-	return p
-}
-
-// Like Uint64, but accepts a shorthand letter that can be used after a single dash.
-func (f *FlagSet) Uint64P(name, shorthand string, value uint64, usage string) *uint64 {
-	p := new(uint64)
-	f.Uint64VarP(p, name, shorthand, value, usage)
-	return p
-}
-
-// Uint64 defines a uint64 flag with specified name, default value, and usage string.
-// The return value is the address of a uint64 variable that stores the value of the flag.
-func Uint64(name string, value uint64, usage string) *uint64 {
-	return commandLine.Uint64P(name, "", value, usage)
-}
-
-// Like Uint64, but accepts a shorthand letter that can be used after a single dash.
-func Uint64P(name, shorthand string, value uint64, usage string) *uint64 {
-	return commandLine.Uint64P(name, shorthand, value, usage)
-}
-
-// StringVar defines a string flag with specified name, default value, and usage string.
-// The argument p points to a string variable in which to store the value of the flag.
-func (f *FlagSet) StringVar(p *string, name string, value string, usage string) {
-	f.VarP(newStringValue(value, p), name, "", usage)
-}
-
-// Like StringVar, but accepts a shorthand letter that can be used after a single dash.
-func (f *FlagSet) StringVarP(p *string, name, shorthand string, value string, usage string) {
-	f.VarP(newStringValue(value, p), name, shorthand, usage)
-}
-
-// StringVar defines a string flag with specified name, default value, and usage string.
-// The argument p points to a string variable in which to store the value of the flag.
-func StringVar(p *string, name string, value string, usage string) {
-	commandLine.VarP(newStringValue(value, p), name, "", usage)
-}
-
-// Like StringVar, but accepts a shorthand letter that can be used after a single dash.
-func StringVarP(p *string, name, shorthand string, value string, usage string) {
-	commandLine.VarP(newStringValue(value, p), name, shorthand, usage)
-}
-
-// String defines a string flag with specified name, default value, and usage string.
-// The return value is the address of a string variable that stores the value of the flag.
-func (f *FlagSet) String(name string, value string, usage string) *string {
-	p := new(string)
-	f.StringVarP(p, name, "", value, usage)
-	return p
-}
-
-// Like String, but accepts a shorthand letter that can be used after a single dash.
-func (f *FlagSet) StringP(name, shorthand string, value string, usage string) *string {
-	p := new(string)
-	f.StringVarP(p, name, shorthand, value, usage)
-	return p
-}
-
-// String defines a string flag with specified name, default value, and usage string.
-// The return value is the address of a string variable that stores the value of the flag.
-func String(name string, value string, usage string) *string {
-	return commandLine.StringP(name, "", value, usage)
-}
-
-// Like String, but accepts a shorthand letter that can be used after a single dash.
-func StringP(name, shorthand string, value string, usage string) *string {
-	return commandLine.StringP(name, shorthand, value, usage)
-}
-
-// Float64Var defines a float64 flag with specified name, default value, and usage string.
-// The argument p points to a float64 variable in which to store the value of the flag.
-func (f *FlagSet) Float64Var(p *float64, name string, value float64, usage string) {
-	f.VarP(newFloat64Value(value, p), name, "", usage)
-}
-
-// Like Float64Var, but accepts a shorthand letter that can be used after a single dash.
-func (f *FlagSet) Float64VarP(p *float64, name, shorthand string, value float64, usage string) {
-	f.VarP(newFloat64Value(value, p), name, shorthand, usage)
-}
-
-// Float64Var defines a float64 flag with specified name, default value, and usage string.
-// The argument p points to a float64 variable in which to store the value of the flag.
-func Float64Var(p *float64, name string, value float64, usage string) {
-	commandLine.VarP(newFloat64Value(value, p), name, "", usage)
-}
-
-// Like Float64Var, but accepts a shorthand letter that can be used after a single dash.
-func Float64VarP(p *float64, name, shorthand string, value float64, usage string) {
-	commandLine.VarP(newFloat64Value(value, p), name, shorthand, usage)
-}
-
-// Float64 defines a float64 flag with specified name, default value, and usage string.
-// The return value is the address of a float64 variable that stores the value of the flag.
-func (f *FlagSet) Float64(name string, value float64, usage string) *float64 {
-	p := new(float64)
-	f.Float64VarP(p, name, "", value, usage)
-	return p
-}
-
-// Like Float64, but accepts a shorthand letter that can be used after a single dash.
-func (f *FlagSet) Float64P(name, shorthand string, value float64, usage string) *float64 {
-	p := new(float64)
-	f.Float64VarP(p, name, shorthand, value, usage)
-	return p
-}
-
-// Float64 defines a float64 flag with specified name, default value, and usage string.
-// The return value is the address of a float64 variable that stores the value of the flag.
-func Float64(name string, value float64, usage string) *float64 {
-	return commandLine.Float64P(name, "", value, usage)
-}
-
-// Like Float64, but accepts a shorthand letter that can be used after a single dash.
-func Float64P(name, shorthand string, value float64, usage string) *float64 {
-	return commandLine.Float64P(name, shorthand, value, usage)
-}
-
-// DurationVar defines a time.Duration flag with specified name, default value, and usage string.
-// The argument p points to a time.Duration variable in which to store the value of the flag.
-func (f *FlagSet) DurationVar(p *time.Duration, name string, value time.Duration, usage string) {
-	f.VarP(newDurationValue(value, p), name, "", usage)
-}
-
-// Like DurationVar, but accepts a shorthand letter that can be used after a single dash.
-func (f *FlagSet) DurationVarP(p *time.Duration, name, shorthand string, value time.Duration, usage string) {
-	f.VarP(newDurationValue(value, p), name, shorthand, usage)
-}
-
-// DurationVar defines a time.Duration flag with specified name, default value, and usage string.
-// The argument p points to a time.Duration variable in which to store the value of the flag.
-func DurationVar(p *time.Duration, name string, value time.Duration, usage string) {
-	commandLine.VarP(newDurationValue(value, p), name, "", usage)
-}
-
-// Like DurationVar, but accepts a shorthand letter that can be used after a single dash.
-func DurationVarP(p *time.Duration, name, shorthand string, value time.Duration, usage string) {
-	commandLine.VarP(newDurationValue(value, p), name, shorthand, usage)
-}
-
-// Duration defines a time.Duration flag with specified name, default value, and usage string.
-// The return value is the address of a time.Duration variable that stores the value of the flag.
-func (f *FlagSet) Duration(name string, value time.Duration, usage string) *time.Duration {
-	p := new(time.Duration)
-	f.DurationVarP(p, name, "", value, usage)
-	return p
-}
-
-// Like Duration, but accepts a shorthand letter that can be used after a single dash.
-func (f *FlagSet) DurationP(name, shorthand string, value time.Duration, usage string) *time.Duration {
-	p := new(time.Duration)
-	f.DurationVarP(p, name, shorthand, value, usage)
-	return p
-}
-
-// Duration defines a time.Duration flag with specified name, default value, and usage string.
-// The return value is the address of a time.Duration variable that stores the value of the flag.
-func Duration(name string, value time.Duration, usage string) *time.Duration {
-	return commandLine.DurationP(name, "", value, usage)
-}
-
-// Like Duration, but accepts a shorthand letter that can be used after a single dash.
-func DurationP(name, shorthand string, value time.Duration, usage string) *time.Duration {
-	return commandLine.DurationP(name, shorthand, value, usage)
-}
+func Args() []string { return CommandLine.args }
 
 // Var defines a flag with the specified name and usage string. The type and
 // value of the flag are represented by the first argument, of type Value, which
@@ -899,7 +379,7 @@ func (f *FlagSet) AddFlag(flag *Flag) {
 	c := flag.Shorthand[0]
 	old, alreadythere := f.shorthands[c]
 	if alreadythere {
-		fmt.Fprintf(f.out(), "%s shorthand reused: %q for %s and %s\n", f.name, c, flag.Name, old.Name)
+		fmt.Fprintf(f.out(), "%s shorthand reused: %q for %s already used for %s\n", f.name, c, name, old.Name)
 		panic("shorthand redefinition")
 	}
 	f.shorthands[c] = flag
@@ -912,12 +392,12 @@ func (f *FlagSet) AddFlag(flag *Flag) {
 // of strings by giving the slice the methods of Value; in particular, Set would
 // decompose the comma-separated string into the slice.
 func Var(value Value, name string, usage string) {
-	commandLine.VarP(value, name, "", usage)
+	CommandLine.VarP(value, name, "", usage)
 }
 
 // Like Var, but accepts a shorthand letter that can be used after a single dash.
 func VarP(value Value, name, shorthand, usage string) {
-	commandLine.VarP(value, name, shorthand, usage)
+	CommandLine.VarP(value, name, shorthand, usage)
 }
 
 // failf prints to standard error a formatted error and usage message and
@@ -930,9 +410,9 @@ func (f *FlagSet) failf(format string, a ...interface{}) error {
 }
 
 // usage calls the Usage method for the flag set, or the usage function if
-// the flag set is commandLine.
+// the flag set is CommandLine.
 func (f *FlagSet) usage() {
-	if f == commandLine {
+	if f == CommandLine {
 		Usage()
 	} else if f.Usage == nil {
 		defaultUsage(f)
@@ -1091,22 +571,22 @@ func (f *FlagSet) Parsed() bool {
 // Parse parses the command-line flags from os.Args[1:].  Must be called
 // after all flags are defined and before flags are accessed by the program.
 func Parse() {
-	// Ignore errors; commandLine is set for ExitOnError.
-	commandLine.Parse(os.Args[1:])
+	// Ignore errors; CommandLine is set for ExitOnError.
+	CommandLine.Parse(os.Args[1:])
 }
 
 // Whether to support interspersed option/non-option arguments.
 func SetInterspersed(interspersed bool) {
-	commandLine.SetInterspersed(interspersed)
+	CommandLine.SetInterspersed(interspersed)
 }
 
 // Parsed returns true if the command-line flags have been parsed.
 func Parsed() bool {
-	return commandLine.Parsed()
+	return CommandLine.Parsed()
 }
 
 // The default set of command-line flags, parsed from os.Args.
-var commandLine = NewFlagSet(os.Args[0], ExitOnError)
+var CommandLine = NewFlagSet(os.Args[0], ExitOnError)
 
 // NewFlagSet returns a new, empty flag set with the specified name and
 // error handling property.