ganeshdipdumbare / goenv

Simple tool to sync env variables into structure

goenv

Simple tool to sync env variables in Go structure.

Description

This tool sync env variable in the structure. It will sync the env variables in the structure passed as input to the function SyncEnvVar.

The env variable name is fetched from the tag of json tag of the structure field as follows-

type EnvVar struct{
    MongoDb string `json:"mongo_db"`
    Port    string `json:"port"`
}

envVar := &EnvVar{
    Port: ":8080"
}

SyncEnvVar(&envVar)
// envVar will be updated to following value
// envVar.MongoDb will be updated with value of env var  MONGO_DB
// envVar.Port will be updated with value of env var PORT, otherwise will remain :8080

This will sync env variables MONGO_DB and PORT. Here port value will be fetched from env variable and if it is not found, default value will be taken as :8080

Important notes

• Do not use omitempty option for structure field.
• JSON tag values should be lower case of env variable name, e.g. if env variable name is MONGO_PORT, then json tag should be mongo_port.