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

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// 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"
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"os"
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"path/filepath"
"github.com/spf13/cobra"
"github.com/spf13/viper"
)
func init() {
RootCmd.AddCommand(addCmd)
}
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var parentName string
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var addCmd = &cobra.Command{
Use: "add [command name]",
Aliases: []string{"command"},
Short: "Add a command to a Cobra Application",
Long: `Add (cobra add) will create a new command, with a license and
the appropriate structure for a Cobra-based CLI application,
and register it to its parent (default RootCmd).
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If you want your command to be public, pass in the command name
with an initial uppercase letter.
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Example: cobra add server -> resulting in a new cmd/server.go`,
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Run: func(cmd *cobra.Command, args []string) {
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if len(args) < 1 {
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er("add needs a name for the command")
}
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wd, err := os.Getwd()
if err != nil {
er(err)
}
project := NewProjectFromPath(wd)
createCmdFile(project, args[0])
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},
}
func init() {
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addCmd.Flags().StringVarP(&parentName, "parent", "p", "RootCmd", "name of parent command for this command")
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}
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func createCmdFile(project *Project, cmdName string) {
template := `{{comment .copyright}}
{{comment .license}}
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package cmd
import (
"fmt"
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"github.com/spf13/cobra"
)
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// {{.cmdName}}Cmd represents the {{.cmdName}} command
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var {{.cmdName}}Cmd = &cobra.Command{
Use: "{{.cmdName}}",
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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.` + "`" + `,
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Run: func(cmd *cobra.Command, args []string) {
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fmt.Println("{{.cmdName}} called")
},
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}
func init() {
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{{.parentName}}.AddCommand({{.cmdName}}Cmd)
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// Here you will define your flags and configuration settings.
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// Cobra supports Persistent Flags which will work for this command
// and all subcommands, e.g.:
// {{.cmdName}}Cmd.PersistentFlags().String("foo", "", "A help for foo")
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// Cobra supports local flags which will only run when this command
// is called directly, e.g.:
// {{.cmdName}}Cmd.Flags().BoolP("toggle", "t", false, "Help message for toggle")
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}
`
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data := make(map[string]interface{})
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data["copyright"] = copyrightLine()
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data["license"] = project.License().Header
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data["viper"] = viper.GetBool("useViper")
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data["parentName"] = parentName
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data["cmdName"] = cmdName
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filePath := filepath.Join(project.CmdPath(), cmdName+".go")
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cmdScript, err := executeTemplate(template, data)
if err != nil {
er(err)
}
err = writeStringToFile(filePath, cmdScript)
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if err != nil {
er(err)
}
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fmt.Println(cmdName, "created at", filePath)
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}