pihole-exporter/config/configuration.go

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package config
import (
"context"
"fmt"
"log"
"reflect"
"time"
"github.com/heetch/confita"
"github.com/heetch/confita/backend"
"github.com/heetch/confita/backend/env"
"github.com/heetch/confita/backend/flags"
)
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// Config is the exporter CLI configuration.
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type Config struct {
PIHoleHostname string `config:"pihole_hostname"`
PIHolePassword string `config:"pihole_password"`
Port string `config:"port"`
Interval time.Duration `config:"interval"`
}
func getDefaultConfig() *Config {
return &Config{
PIHoleHostname: "127.0.0.1",
PIHolePassword: "",
Port: "9311",
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Interval: 10 * time.Second,
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}
}
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// Load method loads the configuration by using both flag or environment variables.
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func Load() *Config {
loaders := []backend.Backend{
env.NewBackend(),
flags.NewBackend(),
}
loader := confita.NewLoader(loaders...)
cfg := getDefaultConfig()
err := loader.Load(context.Background(), cfg)
if err != nil {
panic(err)
}
cfg.show()
return cfg
}
func (c Config) show() {
val := reflect.ValueOf(&c).Elem()
log.Println("------------------------------------")
log.Println("- PI-Hole exporter configuration -")
log.Println("------------------------------------")
for i := 0; i < val.NumField(); i++ {
valueField := val.Field(i)
typeField := val.Type().Field(i)
log.Println(fmt.Sprintf("%s : %v", typeField.Name, valueField.Interface()))
}
log.Println("------------------------------------")
}