The configReader package provides a function ReadEnvVarsIntoStruct that can be used to read environment variables with predefined defaults.
To use the configReader package, first create a struct that you want to read environment variables into:
type Config struct {
Port int `viperEnv:"port"`
Host string `viperEnV:"host" default:"localhost"`
LogLevel string `viperEnv:"LOG_LEVEL" default:"info"`
}Then, in your code, you can use the ReadEnvVarsIntoStruct function to read environment variables into the struct:
package main
import (
"github.com/greenbone/opensight-golang-libraries/configReader"
)
func main() {
var config Config
err := configReader.ReadEnvVarsIntoStruct(&config)
if err != nil {
panic(err)
}
// use the config
}Any environment variables that match the struct fields will be read into the struct. The following environment variables will be read into the Config struct:
PORT=8080
HOST=localhost
LOG_LEVEL=debug
If a field in the struct has a viperEnv tag, the environment variable will be matched to that tag. Otherwise, the field name will be used as the tag.
If a field in the struct has a default tag, a default value will be used if the environment variable is not set.
The configReader package uses Viper for reading environment variables, and Zerolog for logging.
import "github.com/greenbone/opensight-golang-libraries/pkg/configReader"func ReadEnvVarsIntoStruct(s any) (any, error)ReadEnvVarsIntoStruct reads environment variables into a given struct
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