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command.go
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command.go
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// MIT License
// Copyright (c) The RAI Authors
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.
package cmd
import (
"errors"
"fmt"
"io"
"io/fs"
"os"
"strings"
"text/template"
"unicode"
"github.com/go-playground/validator/v10"
"github.com/spf13/cobra"
)
func init() {
createCmd.AddCommand(commandCmd)
}
type Command struct {
ProjectObject Project
CommandName string
}
// commandCmd represents the command command
var (
commandValidationRule = `A command-name must satisfy the following requirements:-
1. The command-name should not begin or end with slash (/).
2. The command-name should not begin with any digit.
3. The command-name should not begin or end with a dot (., U+002E).
4. The command-name is a non-empty string made of up ASCII letters, ASCII digits, and limited ASCII punctuation (-, ., _).
5. The command-name cannot contain more than 100 characters.
`
commandCmd = &cobra.Command{
Use: "command <command-name>",
Short: "Create a new command file of your choice",
Long: `Command takes one argument that is the name of user-defined command
Example :- "bean create command test" will create a command test in the commands folder.`,
Args: cobra.ExactArgs(1),
Run: command,
}
)
func command(cmd *cobra.Command, args []string) {
beanCheck := beanInitialisationCheck() // This function will display an error message on the terminal.
if !beanCheck {
os.Exit(1)
}
wd, err := os.Getwd()
if err != nil {
fmt.Println(err)
os.Exit(1)
}
userCommandName := args[0]
commandName, err := getCommandName(userCommandName)
if err != nil {
fmt.Println(commandValidationRule)
os.Exit(1)
}
commandFilesPath := wd + "/commands/"
commandFileName := strings.ToLower(commandName)
// check if command already exists.
_, err = os.Stat(commandFilesPath + commandFileName + ".go")
if err == nil {
fmt.Println("Command with name " + commandFileName + " already exists.")
return
}
p := &Project{
Copyright: copyright,
RootDir: wd,
}
// Set the relative root path of the internal templates folder.
if p.RootFS, err = fs.Sub(InternalFS, "internal/_tpl"); err != nil {
fmt.Println(err)
os.Exit(1)
}
// Reading the base command file.
baseCommandFilePath := "command.go"
file, err := p.RootFS.Open(baseCommandFilePath)
if err != nil {
fmt.Println(err)
os.Exit(1)
}
fileData, err := io.ReadAll(file)
if err != nil {
fmt.Println(err)
os.Exit(1)
}
tmpl, err := template.New("").Parse(string(fileData))
if err != nil {
fmt.Println(err)
os.Exit(1)
}
var command Command
command.ProjectObject = *p
command.CommandName = commandName
commandFileCreate, err := os.Create(commandFilesPath + commandFileName + ".go")
if err != nil {
fmt.Println(err)
os.Exit(1)
}
defer commandFileCreate.Close()
err = tmpl.Execute(commandFileCreate, command)
if err != nil {
fmt.Println(err)
os.Exit(1)
}
fmt.Printf("command with name %s and command file %s.go created\n", commandName, commandFileName)
}
func getCommandName(commandName string) (string, error) {
validate := validator.New()
if unicode.IsDigit(rune(commandName[0])) {
fmt.Println("commandName starts with digit")
return "", errors.New("command name can not start with a digit")
}
if errs := validate.Var(commandName, "required,max=100,startsnotwith=/,endsnotwith=/,alphanum,startsnotwith=.,endsnotwith=."); errs != nil {
if errs, ok := errs.(validator.ValidationErrors); ok {
return "", errs
}
}
commandName = strings.ToLower(commandName)
return commandName, nil
}