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Code Issues Releases Activity

Allow embedded structs in env_options

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This commit is contained in:
Joel Speed
2019-05-05 19:12:36 +01:00
parent 14d559939f
commit 2da89f8425
2 changed files with 41 additions and 8 deletions
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17
env_options.go
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@@ -15,14 +15,27 @@ type EnvOptions map[string]interface{}
// Fields in the options struct must have an `env` and `cfg` tag to be read
// from the environment
func (cfg EnvOptions) LoadEnvForStruct(options interface{}) {
val := reflect.ValueOf(options).Elem()
typ := val.Type()
val := reflect.ValueOf(options)
var typ reflect.Type
if val.Kind() == reflect.Ptr {
typ = val.Elem().Type()
} else {
typ = val.Type()
}
for i := 0; i < typ.NumField(); i++ {
// pull out the struct tags:
// flag - the name of the command line flag
// deprecated - (optional) the name of the deprecated command line flag
// cfg - (optional, defaults to underscored flag) the name of the config file option
field := typ.Field(i)
fieldV := reflect.Indirect(val).Field(i)
if field.Type.Kind() == reflect.Struct && field.Anonymous {
cfg.LoadEnvForStruct(fieldV.Interface())
continue
}
flagName := field.Tag.Get("flag")
envName := field.Tag.Get("env")
cfgName := field.Tag.Get("cfg")