Merge pull request #410 from codegangsta/remove-global-lookups

Remove all Context.Global* methods

CHANGELOG.md

@@ -5,6 +5,12 @@
 ## 2.0.0 - (unreleased 2.x series)
 ### Added
 - `NewStringSlice` and `NewIntSlice` for creating their related types
+- `Context.Lineage` to get all contexts from current up to global
+- `Context.LocalFlagNames` to get the flag names from *only* the current context
+
+### Changed
+- `Context.FlagNames` now returns all flags in the context lineage
+- `Context.IsSet` now considers the full context lineage
 
 ### Removed
 - the ability to specify `&StringSlice{...string}` or `&IntSlice{...int}`.
@@ -19,6 +25,12 @@
   for this reordering.
 - adapter code for deprecated `Action` func signature
 - deprecated `App.Author`, `App.Email`, and `Command.ShortName` fields
+- All `Context.Global*` methods, as the non-global versions now traverse up
+  the context lineage automatically.
+- `Context.Parent` method, as this is now available via `Context.Lineage`
+
+### Fixed
+- `Context.BoolT` now returns `true` when not found
 
 ## [Unreleased] - (1.x series)
 ### Added

altsrc/helpers_test.go

@@ -1,13 +1,23 @@
 package altsrc
 
 import (
+	"os"
 	"reflect"
+	"runtime"
+	"strings"
 	"testing"
 )
 
+var (
+	wd, _ = os.Getwd()
+)
+
 func expect(t *testing.T, a interface{}, b interface{}) {
-	if !reflect.DeepEqual(b, a) {
-		t.Errorf("Expected %#v (type %v) - Got %#v (type %v)", b, reflect.TypeOf(b), a, reflect.TypeOf(a))
+	_, fn, line, _ := runtime.Caller(1)
+	fn = strings.Replace(fn, wd+"/", "", -1)
+
+	if !reflect.DeepEqual(a, b) {
+		t.Errorf("(%s:%d) Expected %v (type %v) - Got %v (type %v)", fn, line, b, reflect.TypeOf(b), a, reflect.TypeOf(a))
 	}
 }
 

context.go

@@ -13,12 +13,11 @@ import (
 // can be used to retrieve context-specific Args and
 // parsed command-line options.
 type Context struct {
-	App            *App
-	Command        Command
-	flagSet        *flag.FlagSet
-	setFlags       map[string]bool
-	globalSetFlags map[string]bool
-	parentContext  *Context
+	App     *App
+	Command Command
+
+	flagSet       *flag.FlagSet
+	parentContext *Context
 }
 
 // NewContext creates a new context. For use in when invoking an App or Command action.
@@ -28,129 +27,76 @@ func NewContext(app *App, set *flag.FlagSet, parentCtx *Context) *Context {
 
 // Int looks up the value of a local int flag, returns 0 if no int flag exists
 func (c *Context) Int(name string) int {
-	return lookupInt(name, c.flagSet)
-}
-
-// Duration looks up the value of a local time.Duration flag, returns 0 if no
-// time.Duration flag exists
-func (c *Context) Duration(name string) time.Duration {
-	return lookupDuration(name, c.flagSet)
-}
-
-// Float64 looks up the value of a local float64 flag, returns 0 if no float64
-// flag exists
-func (c *Context) Float64(name string) float64 {
-	return lookupFloat64(name, c.flagSet)
-}
-
-// Bool looks up the value of a local bool flag, returns false if no bool flag exists
-func (c *Context) Bool(name string) bool {
-	return lookupBool(name, c.flagSet)
-}
-
-// BoolT looks up the value of a local boolT flag, returns false if no bool flag exists
-func (c *Context) BoolT(name string) bool {
-	return lookupBoolT(name, c.flagSet)
-}
-
-// String looks up the value of a local string flag, returns "" if no string flag exists
-func (c *Context) String(name string) string {
-	return lookupString(name, c.flagSet)
-}
-
-// StringSlice looks up the value of a local string slice flag, returns nil if no
-// string slice flag exists
-func (c *Context) StringSlice(name string) []string {
-	return lookupStringSlice(name, c.flagSet)
-}
-
-// IntSlice looks up the value of a local int slice flag, returns nil if no int
-// slice flag exists
-func (c *Context) IntSlice(name string) []int {
-	return lookupIntSlice(name, c.flagSet)
-}
-
-// Generic looks up the value of a local generic flag, returns nil if no generic
-// flag exists
-func (c *Context) Generic(name string) interface{} {
-	return lookupGeneric(name, c.flagSet)
-}
-
-// GlobalInt looks up the value of a global int flag, returns 0 if no int flag exists
-func (c *Context) GlobalInt(name string) int {
-	if fs := lookupGlobalFlagSet(name, c); fs != nil {
+	if fs := lookupFlagSet(name, c); fs != nil {
 		return lookupInt(name, fs)
 	}
 	return 0
 }
 
-// GlobalFloat64 looks up the value of a global float64 flag, returns float64(0)
-// if no float64 flag exists
-func (c *Context) GlobalFloat64(name string) float64 {
-	if fs := lookupGlobalFlagSet(name, c); fs != nil {
-		return lookupFloat64(name, fs)
-	}
-	return float64(0)
-}
-
-// GlobalDuration looks up the value of a global time.Duration flag, returns 0
-// if no time.Duration flag exists
-func (c *Context) GlobalDuration(name string) time.Duration {
-	if fs := lookupGlobalFlagSet(name, c); fs != nil {
+// Duration looks up the value of a local time.Duration flag, returns 0 if no
+// time.Duration flag exists
+func (c *Context) Duration(name string) time.Duration {
+	if fs := lookupFlagSet(name, c); fs != nil {
 		return lookupDuration(name, fs)
 	}
 	return 0
 }
 
-// GlobalBool looks up the value of a global bool flag, returns false if no bool
+// Float64 looks up the value of a local float64 flag, returns 0 if no float64
 // flag exists
-func (c *Context) GlobalBool(name string) bool {
-	if fs := lookupGlobalFlagSet(name, c); fs != nil {
+func (c *Context) Float64(name string) float64 {
+	if fs := lookupFlagSet(name, c); fs != nil {
+		return lookupFloat64(name, fs)
+	}
+	return 0
+}
+
+// Bool looks up the value of a local bool flag, returns false if no bool flag exists
+func (c *Context) Bool(name string) bool {
+	if fs := lookupFlagSet(name, c); fs != nil {
 		return lookupBool(name, fs)
 	}
 	return false
 }
 
-// GlobalBoolT looks up the value of a global bool flag, returns true if no bool
-// flag exists
-func (c *Context) GlobalBoolT(name string) bool {
-	if fs := lookupGlobalFlagSet(name, c); fs != nil {
+// BoolT looks up the value of a local boolT flag, returns false if no bool flag exists
+func (c *Context) BoolT(name string) bool {
+	if fs := lookupFlagSet(name, c); fs != nil {
 		return lookupBoolT(name, fs)
 	}
-	return false
+	return true
 }
 
-// GlobalString looks up the value of a global string flag, returns "" if no
-// string flag exists
-func (c *Context) GlobalString(name string) string {
-	if fs := lookupGlobalFlagSet(name, c); fs != nil {
+// String looks up the value of a local string flag, returns "" if no string flag exists
+func (c *Context) String(name string) string {
+	if fs := lookupFlagSet(name, c); fs != nil {
 		return lookupString(name, fs)
 	}
 	return ""
 }
 
-// GlobalStringSlice looks up the value of a global string slice flag, returns
-// nil if no string slice flag exists
-func (c *Context) GlobalStringSlice(name string) []string {
-	if fs := lookupGlobalFlagSet(name, c); fs != nil {
+// StringSlice looks up the value of a local string slice flag, returns nil if no
+// string slice flag exists
+func (c *Context) StringSlice(name string) []string {
+	if fs := lookupFlagSet(name, c); fs != nil {
 		return lookupStringSlice(name, fs)
 	}
 	return nil
 }
 
-// GlobalIntSlice looks up the value of a global int slice flag, returns nil if
-// no int slice flag exists
-func (c *Context) GlobalIntSlice(name string) []int {
-	if fs := lookupGlobalFlagSet(name, c); fs != nil {
+// IntSlice looks up the value of a local int slice flag, returns nil if no int
+// slice flag exists
+func (c *Context) IntSlice(name string) []int {
+	if fs := lookupFlagSet(name, c); fs != nil {
 		return lookupIntSlice(name, fs)
 	}
 	return nil
 }
 
-// GlobalGeneric looks up the value of a global generic flag, returns nil if no
-// generic flag exists
-func (c *Context) GlobalGeneric(name string) interface{} {
-	if fs := lookupGlobalFlagSet(name, c); fs != nil {
+// Generic looks up the value of a local generic flag, returns nil if no generic
+// flag exists
+func (c *Context) Generic(name string) interface{} {
+	if fs := lookupFlagSet(name, c); fs != nil {
 		return lookupGeneric(name, fs)
 	}
 	return nil
@@ -166,66 +112,47 @@ func (c *Context) Set(name, value string) error {
 	return c.flagSet.Set(name, value)
 }
 
-// GlobalSet sets a context flag to a value on the global flagset
-func (c *Context) GlobalSet(name, value string) error {
-	return globalContext(c).flagSet.Set(name, value)
-}
-
 // IsSet determines if the flag was actually set
 func (c *Context) IsSet(name string) bool {
-	if c.setFlags == nil {
-		c.setFlags = make(map[string]bool)
-		c.flagSet.Visit(func(f *flag.Flag) {
-			c.setFlags[f.Name] = true
+	if fs := lookupFlagSet(name, c); fs != nil {
+		isSet := false
+		fs.Visit(func(f *flag.Flag) {
+			if f.Name == name {
+				isSet = true
+			}
 		})
+		return isSet
 	}
-	return c.setFlags[name] == true
+	return false
 }
 
-// GlobalIsSet determines if the global flag was actually set
-func (c *Context) GlobalIsSet(name string) bool {
-	if c.globalSetFlags == nil {
-		c.globalSetFlags = make(map[string]bool)
-		ctx := c
-		if ctx.parentContext != nil {
-			ctx = ctx.parentContext
-		}
-		for ; ctx != nil && c.globalSetFlags[name] == false; ctx = ctx.parentContext {
-			ctx.flagSet.Visit(func(f *flag.Flag) {
-				c.globalSetFlags[f.Name] = true
-			})
-		}
-	}
-	return c.globalSetFlags[name]
+// LocalFlagNames returns a slice of flag names used in this context.
+func (c *Context) LocalFlagNames() []string {
+	names := []string{}
+	c.flagSet.Visit(makeFlagNameVisitor(&names))
+	return names
 }
 
-// FlagNames returns a slice of flag names used in this context.
-func (c *Context) FlagNames() (names []string) {
-	for _, flag := range c.Command.Flags {
-		name := strings.Split(flag.GetName(), ",")[0]
-		if name == "help" {
-			continue
-		}
-		names = append(names, name)
+// FlagNames returns a slice of flag names used by the this context and all of
+// its parent contexts.
+func (c *Context) FlagNames() []string {
+	names := []string{}
+	for _, ctx := range c.Lineage() {
+		ctx.flagSet.Visit(makeFlagNameVisitor(&names))
 	}
-	return
+	return names
 }
 
-// GlobalFlagNames returns a slice of global flag names used by the app.
-func (c *Context) GlobalFlagNames() (names []string) {
-	for _, flag := range c.App.Flags {
-		name := strings.Split(flag.GetName(), ",")[0]
-		if name == "help" || name == "version" {
-			continue
-		}
-		names = append(names, name)
-	}
-	return
-}
+// Lineage returns *this* context and all of its ancestor contexts in order from
+// child to parent
+func (c *Context) Lineage() []*Context {
+	lineage := []*Context{}
 
-// Parent returns the parent context, if any
-func (c *Context) Parent() *Context {
-	return c.parentContext
+	for cur := c; cur != nil; cur = cur.parentContext {
+		lineage = append(lineage, cur)
+	}
+
+	return lineage
 }
 
 // Args contains apps console arguments
@@ -278,28 +205,13 @@ func (a Args) Swap(from, to int) error {
 	return nil
 }
 
-func globalContext(ctx *Context) *Context {
-	if ctx == nil {
-		return nil
-	}
-
-	for {
-		if ctx.parentContext == nil {
-			return ctx
-		}
-		ctx = ctx.parentContext
-	}
-}
-
-func lookupGlobalFlagSet(name string, ctx *Context) *flag.FlagSet {
-	if ctx.parentContext != nil {
-		ctx = ctx.parentContext
-	}
-	for ; ctx != nil; ctx = ctx.parentContext {
-		if f := ctx.flagSet.Lookup(name); f != nil {
-			return ctx.flagSet
+func lookupFlagSet(name string, ctx *Context) *flag.FlagSet {
+	for _, c := range ctx.Lineage() {
+		if f := c.flagSet.Lookup(name); f != nil {
+			return c.flagSet
 		}
 	}
+
 	return nil
 }
 
@@ -401,7 +313,7 @@ func lookupBoolT(name string, set *flag.FlagSet) bool {
 		return val
 	}
 
-	return false
+	return true
 }
 
 func copyFlag(name string, ff *flag.Flag, set *flag.FlagSet) {
@@ -445,3 +357,21 @@ func normalizeFlags(flags []Flag, set *flag.FlagSet) error {
 	}
 	return nil
 }
+
+func makeFlagNameVisitor(names *[]string) func(*flag.Flag) {
+	return func(f *flag.Flag) {
+		nameParts := strings.Split(f.Name, ",")
+		name := strings.TrimSpace(nameParts[0])
+
+		for _, part := range nameParts {
+			part = strings.TrimSpace(part)
+			if len(part) > len(name) {
+				name = part
+			}
+		}
+
+		if name != "" {
+			(*names) = append(*names, name)
+		}
+	}
+}

context_test.go

@@ -2,6 +2,7 @@ package cli
 
 import (
 	"flag"
+	"sort"
 	"testing"
 	"time"
 )
@@ -19,8 +20,6 @@ func TestNewContext(t *testing.T) {
 	c.Command = command
 	expect(t, c.Int("myflag"), 12)
 	expect(t, c.Float64("myflag64"), float64(17))
-	expect(t, c.GlobalInt("myflag"), 42)
-	expect(t, c.GlobalFloat64("myflag64"), float64(47))
 	expect(t, c.Command.Name, "mycommand")
 }
 
@@ -31,14 +30,6 @@ func TestContext_Int(t *testing.T) {
 	expect(t, c.Int("myflag"), 12)
 }
 
-func TestContext_GlobalInt(t *testing.T) {
-	set := flag.NewFlagSet("test", 0)
-	set.Int("myflag", 12, "doc")
-	c := NewContext(nil, set, nil)
-	expect(t, c.GlobalInt("myflag"), 12)
-	expect(t, c.GlobalInt("nope"), 0)
-}
-
 func TestContext_Float64(t *testing.T) {
 	set := flag.NewFlagSet("test", 0)
 	set.Float64("myflag", float64(17), "doc")
@@ -46,14 +37,6 @@ func TestContext_Float64(t *testing.T) {
 	expect(t, c.Float64("myflag"), float64(17))
 }
 
-func TestContext_GlobalFloat64(t *testing.T) {
-	set := flag.NewFlagSet("test", 0)
-	set.Float64("myflag", float64(17), "doc")
-	c := NewContext(nil, set, nil)
-	expect(t, c.GlobalFloat64("myflag"), float64(17))
-	expect(t, c.GlobalFloat64("nope"), float64(0))
-}
-
 func TestContext_Duration(t *testing.T) {
 	set := flag.NewFlagSet("test", 0)
 	set.Duration("myflag", time.Duration(12*time.Second), "doc")
@@ -82,30 +65,6 @@ func TestContext_BoolT(t *testing.T) {
 	expect(t, c.BoolT("myflag"), true)
 }
 
-func TestContext_GlobalBool(t *testing.T) {
-	set := flag.NewFlagSet("test", 0)
-
-	globalSet := flag.NewFlagSet("test-global", 0)
-	globalSet.Bool("myflag", false, "doc")
-	globalCtx := NewContext(nil, globalSet, nil)
-
-	c := NewContext(nil, set, globalCtx)
-	expect(t, c.GlobalBool("myflag"), false)
-	expect(t, c.GlobalBool("nope"), false)
-}
-
-func TestContext_GlobalBoolT(t *testing.T) {
-	set := flag.NewFlagSet("test", 0)
-
-	globalSet := flag.NewFlagSet("test-global", 0)
-	globalSet.Bool("myflag", true, "doc")
-	globalCtx := NewContext(nil, globalSet, nil)
-
-	c := NewContext(nil, set, globalCtx)
-	expect(t, c.GlobalBoolT("myflag"), true)
-	expect(t, c.GlobalBoolT("nope"), false)
-}
-
 func TestContext_Args(t *testing.T) {
 	set := flag.NewFlagSet("test", 0)
 	set.Bool("myflag", false, "doc")
@@ -125,37 +84,22 @@ func TestContext_NArg(t *testing.T) {
 
 func TestContext_IsSet(t *testing.T) {
 	set := flag.NewFlagSet("test", 0)
-	set.Bool("myflag", false, "doc")
-	set.String("otherflag", "hello world", "doc")
-	globalSet := flag.NewFlagSet("test", 0)
-	globalSet.Bool("myflagGlobal", true, "doc")
-	globalCtx := NewContext(nil, globalSet, nil)
-	c := NewContext(nil, set, globalCtx)
-	set.Parse([]string{"--myflag", "bat", "baz"})
-	globalSet.Parse([]string{"--myflagGlobal", "bat", "baz"})
-	expect(t, c.IsSet("myflag"), true)
-	expect(t, c.IsSet("otherflag"), false)
-	expect(t, c.IsSet("bogusflag"), false)
-	expect(t, c.IsSet("myflagGlobal"), false)
-}
+	set.Bool("one-flag", false, "doc")
+	set.Bool("two-flag", false, "doc")
+	set.String("three-flag", "hello world", "doc")
+	parentSet := flag.NewFlagSet("test", 0)
+	parentSet.Bool("top-flag", true, "doc")
+	parentCtx := NewContext(nil, parentSet, nil)
+	ctx := NewContext(nil, set, parentCtx)
 
-func TestContext_GlobalIsSet(t *testing.T) {
-	set := flag.NewFlagSet("test", 0)
-	set.Bool("myflag", false, "doc")
-	set.String("otherflag", "hello world", "doc")
-	globalSet := flag.NewFlagSet("test", 0)
-	globalSet.Bool("myflagGlobal", true, "doc")
-	globalSet.Bool("myflagGlobalUnset", true, "doc")
-	globalCtx := NewContext(nil, globalSet, nil)
-	c := NewContext(nil, set, globalCtx)
-	set.Parse([]string{"--myflag", "bat", "baz"})
-	globalSet.Parse([]string{"--myflagGlobal", "bat", "baz"})
-	expect(t, c.GlobalIsSet("myflag"), false)
-	expect(t, c.GlobalIsSet("otherflag"), false)
-	expect(t, c.GlobalIsSet("bogusflag"), false)
-	expect(t, c.GlobalIsSet("myflagGlobal"), true)
-	expect(t, c.GlobalIsSet("myflagGlobalUnset"), false)
-	expect(t, c.GlobalIsSet("bogusGlobal"), false)
+	set.Parse([]string{"--one-flag", "--two-flag", "--three-flag", "frob"})
+	parentSet.Parse([]string{"--top-flag"})
+
+	expect(t, ctx.IsSet("one-flag"), true)
+	expect(t, ctx.IsSet("two-flag"), true)
+	expect(t, ctx.IsSet("three-flag"), true)
+	expect(t, ctx.IsSet("top-flag"), true)
+	expect(t, ctx.IsSet("bogus"), false)
 }
 
 func TestContext_NumFlags(t *testing.T) {
@@ -171,62 +115,6 @@ func TestContext_NumFlags(t *testing.T) {
 	expect(t, c.NumFlags(), 2)
 }
 
-func TestContext_GlobalFlag(t *testing.T) {
-	var globalFlag string
-	var globalFlagSet bool
-	app := NewApp()
-	app.Flags = []Flag{
-		StringFlag{Name: "global, g", Usage: "global"},
-	}
-	app.Action = func(c *Context) error {
-		globalFlag = c.GlobalString("global")
-		globalFlagSet = c.GlobalIsSet("global")
-		return nil
-	}
-	app.Run([]string{"command", "-g", "foo"})
-	expect(t, globalFlag, "foo")
-	expect(t, globalFlagSet, true)
-
-}
-
-func TestContext_GlobalFlagsInSubcommands(t *testing.T) {
-	subcommandRun := false
-	parentFlag := false
-	app := NewApp()
-
-	app.Flags = []Flag{
-		BoolFlag{Name: "debug, d", Usage: "Enable debugging"},
-	}
-
-	app.Commands = []Command{
-		{
-			Name: "foo",
-			Flags: []Flag{
-				BoolFlag{Name: "parent, p", Usage: "Parent flag"},
-			},
-			Subcommands: []Command{
-				{
-					Name: "bar",
-					Action: func(c *Context) error {
-						if c.GlobalBool("debug") {
-							subcommandRun = true
-						}
-						if c.GlobalBool("parent") {
-							parentFlag = true
-						}
-						return nil
-					},
-				},
-			},
-		},
-	}
-
-	app.Run([]string{"command", "-d", "foo", "-p", "bar"})
-
-	expect(t, subcommandRun, true)
-	expect(t, parentFlag, true)
-}
-
 func TestContext_Set(t *testing.T) {
 	set := flag.NewFlagSet("test", 0)
 	set.Int("int", 5, "an int")
@@ -236,21 +124,73 @@ func TestContext_Set(t *testing.T) {
 	expect(t, c.Int("int"), 1)
 }
 
-func TestContext_GlobalSet(t *testing.T) {
-	gSet := flag.NewFlagSet("test", 0)
-	gSet.Int("int", 5, "an int")
+func TestContext_LocalFlagNames(t *testing.T) {
+	set := flag.NewFlagSet("test", 0)
+	set.Bool("one-flag", false, "doc")
+	set.String("two-flag", "hello world", "doc")
+	parentSet := flag.NewFlagSet("test", 0)
+	parentSet.Bool("top-flag", true, "doc")
+	parentCtx := NewContext(nil, parentSet, nil)
+	ctx := NewContext(nil, set, parentCtx)
+	set.Parse([]string{"--one-flag", "--two-flag=foo"})
+	parentSet.Parse([]string{"--top-flag"})
 
-	set := flag.NewFlagSet("sub", 0)
-	set.Int("int", 3, "an int")
+	actualFlags := ctx.LocalFlagNames()
+	sort.Strings(actualFlags)
 
-	pc := NewContext(nil, gSet, nil)
-	c := NewContext(nil, set, pc)
-
-	c.Set("int", "1")
-	expect(t, c.Int("int"), 1)
-	expect(t, c.GlobalInt("int"), 5)
-
-	c.GlobalSet("int", "1")
-	expect(t, c.Int("int"), 1)
-	expect(t, c.GlobalInt("int"), 1)
+	expect(t, actualFlags, []string{"one-flag", "two-flag"})
+}
+
+func TestContext_FlagNames(t *testing.T) {
+	set := flag.NewFlagSet("test", 0)
+	set.Bool("one-flag", false, "doc")
+	set.String("two-flag", "hello world", "doc")
+	parentSet := flag.NewFlagSet("test", 0)
+	parentSet.Bool("top-flag", true, "doc")
+	parentCtx := NewContext(nil, parentSet, nil)
+	ctx := NewContext(nil, set, parentCtx)
+	set.Parse([]string{"--one-flag", "--two-flag=foo"})
+	parentSet.Parse([]string{"--top-flag"})
+
+	actualFlags := ctx.FlagNames()
+	sort.Strings(actualFlags)
+
+	expect(t, actualFlags, []string{"one-flag", "top-flag", "two-flag"})
+}
+
+func TestContext_Lineage(t *testing.T) {
+	set := flag.NewFlagSet("test", 0)
+	set.Bool("local-flag", false, "doc")
+	parentSet := flag.NewFlagSet("test", 0)
+	parentSet.Bool("top-flag", true, "doc")
+	parentCtx := NewContext(nil, parentSet, nil)
+	ctx := NewContext(nil, set, parentCtx)
+	set.Parse([]string{"--local-flag"})
+	parentSet.Parse([]string{"--top-flag"})
+
+	lineage := ctx.Lineage()
+	expect(t, len(lineage), 2)
+	expect(t, lineage[0], ctx)
+	expect(t, lineage[1], parentCtx)
+}
+
+func TestContext_lookupFlagSet(t *testing.T) {
+	set := flag.NewFlagSet("test", 0)
+	set.Bool("local-flag", false, "doc")
+	parentSet := flag.NewFlagSet("test", 0)
+	parentSet.Bool("top-flag", true, "doc")
+	parentCtx := NewContext(nil, parentSet, nil)
+	ctx := NewContext(nil, set, parentCtx)
+	set.Parse([]string{"--local-flag"})
+	parentSet.Parse([]string{"--top-flag"})
+
+	fs := lookupFlagSet("top-flag", ctx)
+	expect(t, fs, parentCtx.flagSet)
+
+	fs = lookupFlagSet("local-flag", ctx)
+	expect(t, fs, ctx.flagSet)
+
+	if fs := lookupFlagSet("frob", ctx); fs != nil {
+		t.Fail()
+	}
 }

help.go

@@ -209,7 +209,7 @@ func checkVersion(c *Context) bool {
 	found := false
 	if VersionFlag.Name != "" {
 		eachName(VersionFlag.Name, func(name string) {
-			if c.GlobalBool(name) || c.Bool(name) {
+			if c.Bool(name) {
 				found = true
 			}
 		})
@@ -221,7 +221,7 @@ func checkHelp(c *Context) bool {
 	found := false
 	if HelpFlag.Name != "" {
 		eachName(HelpFlag.Name, func(name string) {
-			if c.GlobalBool(name) || c.Bool(name) {
+			if c.Bool(name) {
 				found = true
 			}
 		})
@@ -239,7 +239,7 @@ func checkCommandHelp(c *Context, name string) bool {
 }
 
 func checkSubcommandHelp(c *Context) bool {
-	if c.GlobalBool("h") || c.GlobalBool("help") {
+	if c.Bool("h") || c.Bool("help") {
 		ShowSubcommandHelp(c)
 		return true
 	}
@@ -248,7 +248,7 @@ func checkSubcommandHelp(c *Context) bool {
 }
 
 func checkCompletions(c *Context) bool {
-	if (c.GlobalBool(BashCompletionFlag.Name) || c.Bool(BashCompletionFlag.Name)) && c.App.EnableBashCompletion {
+	if c.Bool(BashCompletionFlag.Name) && c.App.EnableBashCompletion {
 		ShowCompletions(c)
 		return true
 	}