Go語言YAML配置文件庫，相似於spring-boot

github.com/flyleft/gpr…

一個簡單的go語言配置文件庫，將YAML配置自動映射到實體中, 相似與spring-boot配置文件。 會從根實體strut遍歷實體屬性，若是類型爲bool, string, 整型, 浮點型，map[string]interface{}，[]interface{}, 則會根據tag中的profile值(不設置則爲當前屬性名的首字母變小寫)解析YAML或flag或環境變量，並賦值； 若YAML或flag或環境變量都不存在，則使用tag中的profileDefault設置默認值； 若默認值也未設置，則返回error。默認變量優先級：環境變量 > flag參數 > YAML > profileDefault默認值， 能夠經過設置envHigher未false，讓flag優先級 > 環境變量。 注意：接收類型和返回類型都須要爲指針類型。

單profile下的使用：

eureka:
 instance:
 preferIpAddress: true
 leaseRenewalIntervalInSeconds: 10
 leaseExpirationDurationInSeconds: 30
 client:
 serviceUrl:
 defaultZone: http://localhost:8000/eureka/
 registryFetchIntervalSeconds: 10
logging:
 level:
    github.com/flyleft/consul-iris/pkg/config: info
    github.com/flyleft/consul-iris/pkg/route: debug
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type SingleEnv struct {
	Eureka  SingleEureka
	Logging map[string]interface{} `profile:"logging.level" profileDefault:"{\"github.com/flyleft/consul-iris\":\"debug\"}"`
}

type SingleEureka struct {
	PreferIpAddress                  bool   `profile:"instance.preferIpAddress"`
	LeaseRenewalIntervalInSeconds    int32  `profile:"instance.leaseRenewalIntervalInSeconds"`
	LeaseExpirationDurationInSeconds uint   `profile:"instance.leaseExpirationDurationInSeconds"`
	ServerDefaultZone                string `profile:"client.serviceUrl.defaultZone" profileDefault:"http://localhost:8000/eureka/"`
	RegistryFetchIntervalSeconds     byte   `profile:"client.registryFetchIntervalSeconds"`
}

//使用
func main()  {
	env, err := Profile(&SingleEnv{}, "test-single-profile.yml", true)
	if err != nil {
		t.Error("Profile execute error", err)
	}
	trueEnv := env.(*SingleEnv)
}
//經過環境變量覆蓋配置，好比設置EUREKA_INSTANCE_LEASERENEWALINTERVALINSECONDS環境變量值覆蓋eureka.instance.leaseRenewalIntervalInSeconds
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多profile下的使用：

profiles:
 active: dev # 設置生效的profile

dev:
 database:
 username: root
 password: root
 eureka:
 zone: http://localhost:8000/eureka/
 fetchInterval: 10
 logging:
 level:
      github.com/flyleft/consul-iris/pkg/config: info
      github.com/flyleft/consul-iris/pkg/route: debug


production:
 database:
 username: production
 password: production
 eureka:
 zone: http://localhost:8000/eureka/
 fetchInterval: 10
 logging:
 level:
      github.com/flyleft/consul-iris/pkg/config: info
      github.com/flyleft/consul-iris/pkg/route: debug

複製代碼

type Eureka struct {
	Zone          string `profile:"zone"`
	FetchInterval int    `profile:"fetchInterval"`
}

type DataSource struct {
	Host     string `profile:"host" profileDefault:"localhost"`
	Username string `profile:"username"`
	Password string `profile:"password"`
}

type MultiEnv struct {
	DataSource DataSource `profile:"database"`
	Eureka     Eureka
	Logging    map[string]interface{} `profile:"logging.level" profileDefault:"{\"github.com/flyleft/consul-iris\":\"debug\"}"`
	Users      []interface{}          `profile:"users" profileDefault:"[\"admin\",\"test\",\"root\"]"`
}
func main()  {
	env, err := Profile(&MultiEnv{}, "test-multi-profile.yml", true)
	if err != nil {
		t.Error("Profile execute error", err)
	}
	trueEnv := env.(*MultiEnv)
}
//可經過環境變量DEV_EUREKA_ZONE覆蓋eureka.zone的值
複製代碼