75 lines
1.8 KiB
Go
75 lines
1.8 KiB
Go
// Package config implement a simple configuration package.
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// It define a type [AppConfig] that represent the aplication configuration and
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// use viper [https://github.com/spf13/viper] to load the configuration.
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package config
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import (
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"bytes"
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"encoding/json"
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"strings"
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ipfslog "github.com/ipfs/go-log/v2"
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"github.com/spf13/viper"
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)
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const (
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RunModeProduction = "PRODUCTION"
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RunModeDevelopmernt = "DEVELOPMENT"
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)
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// AppConfig defines the configuration for the app.
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type AppConfig struct {
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DB struct {
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URL string
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// database name
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Name string
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}
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Cache struct {
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URL string
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Enabled bool
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}
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PORT int
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LogLevel string
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RunMode string
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}
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// GetLogLevel get zapcore.Level define in the configuraion.
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func (cfg *AppConfig) GetLogLevel() (ipfslog.LogLevel, error) {
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return ipfslog.LevelFromString(cfg.LogLevel)
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}
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func init() {
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viper.SetDefault("port", 8000)
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viper.SetDefault("loglevel", "INFO")
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viper.SetDefault("runmode", "PRODUCTION")
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// Consider environment variables in unmarshall doesn't work unless doing this: https://github.com/spf13/viper/issues/188#issuecomment-1168898503
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b, err := json.Marshal(AppConfig{})
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if err != nil {
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panic(err)
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}
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defaultConfig := bytes.NewReader(b)
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viper.SetConfigType("yaml")
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if err := viper.MergeConfig(defaultConfig); err != nil {
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panic(err)
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}
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// overwrite values from config
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if err := viper.MergeInConfig(); err != nil {
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if _, ok := err.(viper.ConfigParseError); ok {
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panic(err)
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}
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// dont return error if file is missing. overwrite file is optional
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}
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// tell viper to overrwire env variables
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viper.SetEnvKeyReplacer(strings.NewReplacer(".", "_"))
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viper.SetEnvPrefix("WORMSCAN")
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viper.AutomaticEnv()
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}
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// Get returns the app configuration.
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func Get() (*AppConfig, error) {
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var cfg AppConfig
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err := viper.Unmarshal(&cfg)
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return &cfg, err
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}
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