Fix missing recursion

Signed-off-by: Marc Khouzam <marc.khouzam@gmail.com>

cobra_test.go

@@ -18,6 +18,7 @@ import (
 	"os"
 	"os/exec"
 	"path/filepath"
+	"runtime"
 	"strings"
 	"testing"
 	"text/template"

command.go

@@ -437,10 +437,7 @@ func (c *Command) UsageFunc() (f func(*Command) error) {
 	}
 	return func(c *Command) error {
 		c.mergePersistentFlags()
-		fn := defaultUsageFunc
-		if c.usageTemplate != nil {
-			fn = c.usageTemplate.fn
-		}
+		fn := c.getUsageTemplateFunc()
 		err := fn(c.OutOrStderr(), c)
 		if err != nil {
 			c.PrintErrln(err)
@@ -449,6 +446,19 @@ func (c *Command) UsageFunc() (f func(*Command) error) {
 	}
 }
 
+// getUsageTemplateFunc returns the usage template function for the command
+// going up the command tree if necessary.
+func (c *Command) getUsageTemplateFunc() func(w io.Writer, data interface{}) error {
+	if c.usageTemplate != nil {
+		return c.usageTemplate.fn
+	}
+
+	if c.HasParent() {
+		return c.parent.getUsageTemplateFunc()
+	}
+	return defaultUsageFunc
+}
+
 // Usage puts out the usage for the command.
 // Used when a user provides invalid input.
 // Can be defined by user by overriding UsageFunc.
@@ -467,10 +477,7 @@ func (c *Command) HelpFunc() func(*Command, []string) {
 	}
 	return func(c *Command, a []string) {
 		c.mergePersistentFlags()
-		fn := defaultHelpFunc
-		if c.helpTemplate != nil {
-			fn = c.helpTemplate.fn
-		}
+		fn := c.getHelpTemplateFunc()
 		// The help should be sent to stdout
 		// See https://github.com/spf13/cobra/issues/1002
 		err := fn(c.OutOrStdout(), c)
@@ -480,6 +487,20 @@ func (c *Command) HelpFunc() func(*Command, []string) {
 	}
 }
 
+// getHelpTemplateFunc returns the help template function for the command
+// going up the command tree if necessary.
+func (c *Command) getHelpTemplateFunc() func(w io.Writer, data interface{}) error {
+	if c.helpTemplate != nil {
+		return c.helpTemplate.fn
+	}
+
+	if c.HasParent() {
+		return c.parent.getHelpTemplateFunc()
+	}
+
+	return defaultHelpFunc
+}
+
 // Help puts out the help for the command.
 // Used when a user calls help [command].
 // Can be defined by user by overriding HelpFunc.
@@ -554,6 +575,7 @@ func (c *Command) NamePadding() int {
 }
 
 // UsageTemplate returns usage template for the command.
+// This function is kept for backwards-compatibility reasons.
 func (c *Command) UsageTemplate() string {
 	if c.usageTemplate != nil {
 		return c.usageTemplate.tmpl
@@ -566,6 +588,7 @@ func (c *Command) UsageTemplate() string {
 }
 
 // HelpTemplate return help template for the command.
+// This function is kept for backwards-compatibility reasons.
 func (c *Command) HelpTemplate() string {
 	if c.helpTemplate != nil {
 		return c.helpTemplate.tmpl
@@ -578,6 +601,7 @@ func (c *Command) HelpTemplate() string {
 }
 
 // VersionTemplate return version template for the command.
+// This function is kept for backwards-compatibility reasons.
 func (c *Command) VersionTemplate() string {
 	if c.versionTemplate != nil {
 		return c.versionTemplate.tmpl
@@ -589,6 +613,19 @@ func (c *Command) VersionTemplate() string {
 	return defaultVersionTemplate
 }
 
+// getVersionTemplateFunc returns the version template function for the command
+// going up the command tree if necessary.
+func (c *Command) getVersionTemplateFunc() func(w io.Writer, data interface{}) error {
+	if c.versionTemplate != nil {
+		return c.versionTemplate.fn
+	}
+
+	if c.HasParent() {
+		return c.parent.getVersionTemplateFunc()
+	}
+	return defaultVersionFunc
+}
+
 // ErrPrefix return error message prefix for the command
 func (c *Command) ErrPrefix() string {
 	if c.errPrefix != "" {
@@ -893,10 +930,7 @@ func (c *Command) execute(a []string) (err error) {
 			return err
 		}
 		if versionVal {
-			fn := defaultVersionFunc
-			if c.versionTemplate != nil {
-				fn = c.versionTemplate.fn
-			}
+			fn := c.getVersionTemplateFunc()
 			err := fn(c.OutOrStdout(), c)
 			if err != nil {
 				c.Println(err)