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config.go
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config.go
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package config
import (
"github.com/fsnotify/fsnotify"
"github.com/gookit/config/v2"
"github.com/gookit/config/v2/yaml"
"go.uber.org/zap"
)
// OnChange is called when a config change is detected, can be set during runtime
var OnChange func()
type Config struct {
LogLevel string
Environment string
Twitch struct {
Clientid string
Clientsecret string
Redirecturi string
State string
}
Kube struct {
Namespace string
Oauthsecret string
}
Http struct {
Port string
}
Health struct {
Enabled bool
Port string
}
Prometheus struct {
Enabled bool
Port string
}
}
func New() *Config {
cfg := &Config{}
loader := config.NewWithOptions("loader", config.ParseTime)
loader.AddDriver(yaml.Driver)
err := loader.LoadFiles("config.yaml")
if err != nil {
panic(err)
}
err = loader.Decode(cfg)
if err != nil {
panic(err)
}
err = watchConfig(cfg, loader)
if err != nil {
zap.L().Error("config watcher", zap.String("error", err.Error()))
}
return cfg
}
func watchConfig(cfg *Config, loader *config.Config) error {
watcher, err := fsnotify.NewWatcher()
if err != nil {
return err
}
go func() {
defer watcher.Close()
for {
select {
case event, ok := <-watcher.Events:
if !ok {
return
}
if !event.Has(fsnotify.Write) {
continue
}
zap.L().Info("modified config", zap.String("file", event.Name))
err := loader.ReloadFiles()
if err != nil {
zap.L().Error("reload config", zap.String("error", err.Error()))
}
err = loader.Decode(cfg)
if err != nil {
panic(err)
}
if OnChange == nil {
continue
}
OnChange()
case err, _ := <-watcher.Errors:
if err != nil {
zap.L().Error("watch config", zap.String("error", err.Error()))
}
}
}
}()
files := loader.LoadedFiles()
if len(files) == 0 {
zap.L().Info("watching 0 files")
return nil
}
for _, file := range files {
err = watcher.Add(file)
if err != nil {
return err
}
zap.L().Info("watching config", zap.String("file", file))
}
return nil
}