spf13--cobra/cobra/cmd/add.go

// Copyright © 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"
	"strings"

	"github.com/spf13/cobra"
	"github.com/spf13/viper"
)

func init() {
	RootCmd.AddCommand(addCmd)
}

var pName string

// initialize Command
var addCmd = &cobra.Command{
	Use:     "add [command name]",
	Aliases: []string{"command"},
	Short:   "Add a command to a Cobra Application",
	Long: `Add will create a new command, with a license and the appropriate structure
	for a Cobra based CLI application and register it to it's parent (default RootCmd).

  If you want your command to be public, pass in the command name with an initial upper case letter.

  Example: cobra add server  -> resulting in a new cmd/server.go
  `,

	Run: func(cmd *cobra.Command, args []string) {
		if len(args) != 1 {
			er("add needs a name for the command")
		}
		guessProjectPath()
		createCmdFile(args[0])
	},
}

func init() {
	addCmd.Flags().StringVarP(&pName, "parent", "p", "RootCmd", "name of parent command for this command")
}

func parentName() string {
	if !strings.HasSuffix(strings.ToLower(pName), "cmd") {
		return pName + "Cmd"
	}

	return pName
}

func createCmdFile(cmdName string) {
	lic := getLicense()

	template := `{{ comment .copyright }}
//
{{ comment .license }}
package cmd

import (
  "fmt"

	"github.com/spf13/cobra"
)

// {{.cmdName}}Cmd respresents the {{.cmdName}} command
var {{ .cmdName }}Cmd = &cobra.Command{
	Use:   "{{ .cmdName }}",
	Short: "A brief description of your command",
	Long: ` + "`" + `A longer description that spans multiple lines and likely contains examples
and usage of using your command. For example:

Cobra is a Cli library for Go that empowers applications. This
application is a tool to generate the needed files to quickly create a Cobra
application.` + "`" + `,
	Run: func(cmd *cobra.Command, args []string) {
    // TODO: Work your own magic here
    fmt.Println("{{ .cmdName }} called")
   },
}

func init() {
	{{ .parentName }}.AddCommand({{ .cmdName }}Cmd)

	// Here you will define your flags and configuration settings

	// Cobra supports Persistent Flags which will work for this command and all subcommands
  // {{.cmdName}}Cmd.PersistentFlags().String("foo", "", "A help for foo")

	// Cobra supports local flags which will only run when this command is called directly
	// {{.cmdName}}Cmd.Flags().BoolP("toggle", "t", false, "Help message for toggle" )

}
`

	var data map[string]interface{}
	data = make(map[string]interface{})

	data["copyright"] = copyrightLine()
	data["license"] = lic.Header
	data["appName"] = projectName()
	data["viper"] = viper.GetBool("useViper")
	data["parentName"] = parentName()
	data["cmdName"] = cmdName

	err := writeTemplateToFile(ProjectPath()+string(os.PathSeparator)+guessCmdDir(), cmdName+".go", template, data)
	if err != nil {
		er(err)
	}
	fmt.Println(cmdName, "created at", filepath.Join(ProjectPath()+string(os.PathSeparator)+guessCmdDir(), cmdName+".go"))
}