goenums

goenums

goenums is a tool for auto generating Go Enum methods. Inspired by Stringer and gotests.

Overview

• Provide better code consistence for enum
  • Must be signed or unsigned integer type
  • Must contain 0 value as fall back
• Upsert the basic methods into the same file without overwriting other functions.
  • Append if functions/methods/variables not exists
  • Replace if variables exists
  • Do nothing if functions/methods exists

Getting Started

Add the dependency with latest version

go get github.com/u-next/goenums

Create a tools.go file and add goenums as a tool dependency.

//go:build tools
// +build tools

package tools

import (
	_ "github.com/u-next/goenums"
)

goenums support various interfaces, run the command with either one below

• go generate ./...
• goenums [options]

go:generate

1. Given the name of a (signed or unsigned) integer type T that has constants defined

package values

type Resolution int

const (
	ResolutionUnspecified Resolution = iota
	ResolutionSD
	ResolutionHHD
	ResolutionFHD
	ResolutionUHD4K
	ResolutionUHD8K
)

1. Put the magic comment between package and import to tells go generate what command to run when we want to regenerate our code

  package values

+ //go:generate go run github.com/u-next/goenums

  type Resolution int

1. Run go generate recursively over your entire project

go generate ./...

Command Line

# e.g.enums <examples/type.go>
goenums <filepath>

# Show the help menu
goenums -h

A commandline tool for auto generating Go Enum methods.
Usage: $ goenums [options] <filepath>

For more information, see:
	https://github.com/u-next/goenums

Options:
  -case string
    	The case style of enum in String. Available options are:
    	- UPPER_SNAKE_CASE
    	- lower_snake_case
    	- UpperCamelCase
    	- lowerCamelCase
    	 (default "UPPER_SNAKE_CASE")
  -dryrun
    	Should print the result to console rather than pipe to a file
  -json
    	Should generate methods implementing json.Marshaler and json.Unmarshaler interface
  -trim string
    	Trim the value of enum name