protoc-gen-coco/util.go

package main

import (
	"os"
	"strings"
	"unicode"

	"google.golang.org/protobuf/compiler/protogen"
)

// CamelCaseToUnderscore converts CamelCase to camel_case
func CamelCaseToUnderscore(str string) string {
	var result string
	for idx, ch := range str {
		// first letter will just be lowered
		if idx == 0 {
			result = string(unicode.ToLower(ch))
			continue
		}

		// anywhere else
		if unicode.IsUpper(ch) {
			result = result + "_" + string(unicode.ToLower(ch))
			continue
		}

		// nothing to see here, just accept it
		result += string(ch)
	}

	return result
}

// CamelCaseToJavascriptCase convert CamelCase to camelCase
func CamelCaseToJavascriptCase(str string) string {
	var result string
	for idx, ch := range str {
		if idx == 0 {
			result = string(unicode.ToLower(ch))
			continue
		}

		result += string(ch)
	}
	return result
}

// JavascriptCaseToCamelCase convert camelCase to CamelCase
func JavascriptCaseToCamelCase(str string) string {
	var result string
	for idx, ch := range str {
		if idx == 0 {
			result = string(unicode.ToUpper(ch))
			continue
		}

		result += string(ch)
	}
	return result
}

func getCommentFromEnumItem(comment protogen.CommentSet) string {
	c := strings.Trim(string(comment.Trailing), " \n\t\r")
	if c == "" {
		c = "unknown error"
	}
	return c
}

func separator(name string) string {
	name = strings.ReplaceAll(name, "\\\\", "/")
	return strings.ReplaceAll(name, "\\", "/")
}

func trim(s string) string {
	return strings.Trim(s, "\r\t\n")
}

func mkdir(p string) error {
	_, err := os.Stat(p)
	if os.IsNotExist(err) {
		err := os.MkdirAll(p, os.ModePerm)
		if err != nil {
			return err
		}
		return nil
	}
	return err
}