Go语言YAML配置文件库，相似于spring-boot

github.com/flyleft/gpr…

一个简单的go语言配置文件库，将YAML配置自动映射到实体中, 相似与spring-boot配置文件。 会从根实体strut遍历实体属性，若是类型为bool, string, 整型, 浮点型，map[string]interface{}，[]interface{}, 则会根据tag中的profile值(不设置则为当前属性名的首字母变小写)解析YAML或flag或环境变量，并赋值； 若YAML或flag或环境变量都不存在，则使用tag中的profileDefault设置默认值； 若默认值也未设置，则返回error。默认变量优先级：环境变量 > flag参数 > YAML > profileDefault默认值， 能够经过设置envHigher未false，让flag优先级 > 环境变量。 注意：接收类型和返回类型都须要为指针类型。

单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
复制代码

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)
}
//经过环境变量覆盖配置，好比设置EUREKA_INSTANCE_LEASERENEWALINTERVALINSECONDS环境变量值覆盖eureka.instance.leaseRenewalIntervalInSeconds
复制代码

多profile下的使用：

profiles:
 active: dev # 设置生效的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

复制代码

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)
}
//可经过环境变量DEV_EUREKA_ZONE覆盖eureka.zone的值
复制代码