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nyaa-pantsu/vendor/github.com/jinzhu/configor/README.md
akuma06 713ab02450 Added configor as a new library (#1126)
* Added configor as a new library

Now config is a singleton. You only need to do config.Get() instead of doing config.Conf.

* Forgot godep save 🐤

* Fix accidental removal of }
2017-07-10 22:11:05 +10:00

4 Kio

Configor

Golang Configuration tool that support YAML, JSON, TOML, Shell Environment

Usage

package main

import (
	"fmt"
	"github.com/jinzhu/configor"
)

var Config = struct {
	APPName string `default:"app name"`

	DB struct {
		Name     string
		User     string `default:"root"`
		Password string `required:"true" env:"DBPassword"`
		Port     uint   `default:"3306"`
	}

	Contacts []struct {
		Name  string
		Email string `required:"true"`
	}
}{}

func main() {
	configor.Load(&Config, "config.yml")
	fmt.Printf("config: %#v", Config)
}

With configuration file config.yml:

appname: test

db:
    name:     test
    user:     test
    password: test
    port:     1234

contacts:
- name: i test
  email: test@test.com

Advanced Usage

  • Load mutiple configurations
// Earlier configurations have higher priority
configor.Load(&Config, "application.yml", "database.json")
  • Load configuration by environment

Use CONFIGOR_ENV to set environment, if CONFIGOR_ENV not set, environment will be development by default, and it will be test when running tests with go test

// config.go
configor.Load(&Config, "config.json")

$ go run config.go
// Will load `config.json`, `config.development.json` if it exists
// `config.development.json` will overwrite `config.json`'s configuration
// You could use this to share same configuration across different environments

$ CONFIGOR_ENV=production go run config.go
// Will load `config.json`, `config.production.json` if it exists
// `config.production.json` will overwrite `config.json`'s configuration

$ go test
// Will load `config.json`, `config.test.json` if it exists
// `config.test.json` will overwrite `config.json`'s configuration

$ CONFIGOR_ENV=production go test
// Will load `config.json`, `config.production.json` if it exists
// `config.production.json` will overwrite `config.json`'s configuration
// Set environment by config
configor.New(&configor.Config{Environment: "production"}).Load(&Config, "config.json")
  • Example Configuration
// config.go
configor.Load(&Config, "config.yml")

$ go run config.go
// Will load `config.example.yml` automatically if `config.yml` not found and print warning message
  • Load From Shell Environment
$ CONFIGOR_APPNAME="hello world" CONFIGOR_DB_NAME="hello world" go run config.go
// Load configuration from shell environment, it's name is {{prefix}}_FieldName
// You could overwrite the prefix with environment CONFIGOR_ENV_PREFIX, for example:
$ CONFIGOR_ENV_PREFIX="WEB" WEB_APPNAME="hello world" WEB_DB_NAME="hello world" go run config.go

// Set prefix by config
configor.New(&configor.Config{ENVPrefix: "WEB"}).Load(&Config, "config.json")
  • Anonymous Struct

Add the anonymous:"true" tag to an anonymous, embedded struct to NOT include the struct name in the environment variable of any contained fields. For example:

type Details struct {
	Description string
}

type Config struct {
	Details `anonymous:"true"`
}

With the anonymous:"true" tag specified, the environment variable for the Description field is CONFIGOR_DESCRIPTION. Without the anonymous:"true"tag specified, then environment variable would include the embedded struct name and be CONFIGOR_DETAILS_DESCRIPTION.

  • With flags
func main() {
	config := flag.String("file", "config.yml", "configuration file")
	flag.StringVar(&Config.APPName, "name", "", "app name")
	flag.StringVar(&Config.DB.Name, "db-name", "", "database name")
	flag.StringVar(&Config.DB.User, "db-user", "root", "database user")
	flag.Parse()

	os.Setenv("CONFIGOR_ENV_PREFIX", "-")
	configor.Load(&Config, *config)
	// configor.Load(&Config) // only load configurations from shell env & flag
}

Supporting the project

http://patreon.com/jinzhu

Author

jinzhu

License

Released under the MIT License