Add idiomatic handling of go error in distinct main func

cobra/cmd/root.go

@@ -36,8 +36,8 @@ to quickly create a Cobra application.`,
 )
 
 // Execute executes the root command.
-func Execute() {
-	rootCmd.Execute()
+func Execute() error {
+	return rootCmd.Execute()
 }
 
 func init() {

cobra/main.go

@@ -13,8 +13,18 @@
 
 package main
 
-import "github.com/spf13/cobra/cobra/cmd"
+import (
+	"os"
+
+	"github.com/spf13/cobra/cobra/cmd"
+)
 
 func main() {
-	cmd.Execute()
+	if err := runMain(); err != nil {
+		os.Exit(1)
+	}
+}
+
+func runMain() error {
+	return cmd.Execute()
 }