cobra Run function with errors

runerror.patch

diff --git a/command.go b/command.go
index cbbc326..9e4518f 100644
--- a/command.go
+++ b/command.go
@@ -70,6 +70,9 @@ type Command struct {
        PreRun func(cmd *Command, args []string)
        // Run: Typically the actual work function. Most commands will only implement this
        Run func(cmd *Command, args []string)
+       // RunE: Typically the actual work function. Most commands will only implement this
+       // Same as Run but return an error. If both as set, RunE will be used
+       RunE func(cmd *Command, args []string) error
        // PostRun: run after the Run command.
        PostRun func(cmd *Command, args []string)
        // PersistentPostRun: children of this command will inherit and execute after PostRun
@@ -473,7 +476,13 @@ func (c *Command) execute(a []string) (err error) {
                c.PreRun(c, argWoFlags)
        }
 
-       c.Run(c, argWoFlags)
+       if c.RunE != nil {
+               if err := c.RunE(c, argWoFlags); err != nil {
+                       return err
+               }
+       } else {
+               c.Run(c, argWoFlags)
+       }
 
        if c.PostRun != nil {
                c.PostRun(c, argWoFlags)