You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: add.go
    path of file: ./repos/awless/vendor/github.com/spf13/cobra/cobra/cmd
    
    the code of the file until where you have to start completion: // Copyright Â© 2015 Steve Francia <spf@spf13.com>.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package cmd

import (
	"fmt"
	"os"
	"path/filepath"
	"unicode"

	"github.com/spf13/cobra"
)

func init() {
	addCmd.Flags().StringVarP(&packageName, "package", "t", "", "target package name (e.g. github.com/spf13/hugo)")
	addCmd.Flags().StringVarP(&parentName, "parent", "p", "rootCmd", "variable name of parent command for this command")
}

var packageName, parentName string

var addCmd = &cobra.Comman
    
func validateCmdName(source string) string {
	i := 0
	l := len(source)
	// The output is initialized on demand, then first dash or underscore
	// occurs.
	var output string

	for i < l {
		if source[i] == '-' || source[i] == '_' {
			if output == "" {
				output = source[:i]
			}

			// If it's last rune and it's dash or underscore,
			// don't add it output and break the loop.
			if i == l-1 {
				break
			}

			// If next character is dash or underscore,
			// just skip the current character.
			if source[i+1] == '-' || source[i+1] == '_' {
				i++
				continue
			}

			// If the current character is dash or underscore,
			// upper next letter and add to output.
			output += string(unicode.ToUpper(rune(source[i+1])))
			// We know, what source[i] is dash or underscore and source[i+1] is
			// uppered character, so make i = i+2.
			i += 2
			continue
		}

		// If the current character isn't dash or underscore,
		// just add it.
		if output != "" {
			output += string(source[i])
		}
		i++
	}

	if output == "" {
		return source // source is initially valid name.
	}
	return output
}