Merge pull request #1214 from anicoll/flag_lineage_fix

fix for parent context not setting child flags

docs/v2/manual.md

@@ -649,7 +649,7 @@ func main() {
 
   app := &cli.App{
     Action: func(c *cli.Context) error {
-      fmt.Println("yaml ist rad")
+      fmt.Println("--test value.*default: 0")
       return nil
     },
     Before: altsrc.InitInputSourceWithContext(flags, altsrc.NewYamlSourceFromFlagFunc("load")),

flag_int64_slice.go

@@ -145,7 +145,10 @@ func (f *Int64SliceFlag) Apply(set *flag.FlagSet) error {
 // Int64Slice looks up the value of a local Int64SliceFlag, returns
 // nil if not found
 func (c *Context) Int64Slice(name string) []int64 {
-	return lookupInt64Slice(name, c.flagSet)
+	if fs := lookupFlagSet(name, c); fs != nil {
+		return lookupInt64Slice(name, fs)
+	}
+	return nil
 }
 
 func lookupInt64Slice(name string, set *flag.FlagSet) []int64 {

flag_int_slice.go

@@ -157,7 +157,7 @@ func (f *IntSliceFlag) Apply(set *flag.FlagSet) error {
 // nil if not found
 func (c *Context) IntSlice(name string) []int {
 	if fs := lookupFlagSet(name, c); fs != nil {
-		return lookupIntSlice(name, c.flagSet)
+		return lookupIntSlice(name, fs)
 	}
 	return nil
 }

flag_test.go

@@ -674,6 +674,45 @@ func TestIntSliceFlagApply_SetsAllNames(t *testing.T) {
 	expect(t, err, nil)
 }
 
+func TestIntSliceFlagApply_ParentContext(t *testing.T) {
+	_ = (&App{
+		Flags: []Flag{
+			&IntSliceFlag{Name: "numbers", Aliases: []string{"n"}, Value: NewIntSlice(1, 2, 3)},
+		},
+		Commands: []*Command{
+			{
+				Name: "child",
+				Action: func(ctx *Context) error {
+					expected := []int{1, 2, 3}
+					if !reflect.DeepEqual(ctx.IntSlice("numbers"), expected) {
+						t.Errorf("child context unable to view parent flag: %v != %v", expected, ctx.IntSlice("numbers"))
+					}
+					if !reflect.DeepEqual(ctx.IntSlice("n"), expected) {
+						t.Errorf("child context unable to view parent flag: %v != %v", expected, ctx.IntSlice("n"))
+					}
+					return nil
+				},
+			},
+		},
+	}).Run([]string{"run", "child"})
+}
+
+func TestIntSliceFlag_SetFromParentContext(t *testing.T) {
+	fl := &IntSliceFlag{Name: "numbers", Aliases: []string{"n"}, Value: NewIntSlice(1, 2, 3, 4)}
+	set := flag.NewFlagSet("test", 0)
+	_ = fl.Apply(set)
+	ctx := &Context{
+		parentContext: &Context{
+			flagSet: set,
+		},
+		flagSet: flag.NewFlagSet("empty", 0),
+	}
+	expected := []int{1, 2, 3, 4}
+	if !reflect.DeepEqual(ctx.IntSlice("numbers"), expected) {
+		t.Errorf("child context unable to view parent flag: %v != %v", expected, ctx.IntSlice("numbers"))
+	}
+}
+
 var int64SliceFlagTests = []struct {
 	name     string
 	aliases  []string
@@ -716,6 +755,60 @@ func TestInt64SliceFlagWithEnvVarHelpOutput(t *testing.T) {
 	}
 }
 
+func TestInt64SliceFlagApply_ParentContext(t *testing.T) {
+	_ = (&App{
+		Flags: []Flag{
+			&Int64SliceFlag{Name: "numbers", Aliases: []string{"n"}, Value: NewInt64Slice(1, 2, 3)},
+		},
+		Commands: []*Command{
+			{
+				Name: "child",
+				Action: func(ctx *Context) error {
+					expected := []int64{1, 2, 3}
+					if !reflect.DeepEqual(ctx.Int64Slice("numbers"), expected) {
+						t.Errorf("child context unable to view parent flag: %v != %v", expected, ctx.Int64Slice("numbers"))
+					}
+					if !reflect.DeepEqual(ctx.Int64Slice("n"), expected) {
+						t.Errorf("child context unable to view parent flag: %v != %v", expected, ctx.Int64Slice("n"))
+					}
+					return nil
+				},
+			},
+		},
+	}).Run([]string{"run", "child"})
+}
+
+func TestInt64SliceFlag_SetFromParentContext(t *testing.T) {
+	fl := &Int64SliceFlag{Name: "numbers", Aliases: []string{"n"}, Value: NewInt64Slice(1, 2, 3, 4)}
+	set := flag.NewFlagSet("test", 0)
+	_ = fl.Apply(set)
+	ctx := &Context{
+		parentContext: &Context{
+			flagSet: set,
+		},
+		flagSet: flag.NewFlagSet("empty", 0),
+	}
+	expected := []int64{1, 2, 3, 4}
+	if !reflect.DeepEqual(ctx.Int64Slice("numbers"), expected) {
+		t.Errorf("child context unable to view parent flag: %v != %v", expected, ctx.Int64Slice("numbers"))
+	}
+}
+func TestInt64SliceFlag_ReturnNil(t *testing.T) {
+	fl := &Int64SliceFlag{}
+	set := flag.NewFlagSet("test", 0)
+	_ = fl.Apply(set)
+	ctx := &Context{
+		parentContext: &Context{
+			flagSet: set,
+		},
+		flagSet: flag.NewFlagSet("empty", 0),
+	}
+	expected := []int64(nil)
+	if !reflect.DeepEqual(ctx.Int64Slice("numbers"), expected) {
+		t.Errorf("child context unable to view parent flag: %v != %v", expected, ctx.Int64Slice("numbers"))
+	}
+}
+
 var float64FlagTests = []struct {
 	name     string
 	expected string