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115 lines
3.4 KiB
115 lines
3.4 KiB
package viperconfig
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import (
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"bytes"
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"fmt"
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"github.com/spf13/viper"
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)
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// CreateEnvViper creates viper to read variables from system enviroment
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func CreateEnvViper() *viper.Viper {
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envViper := viper.New()
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envViper.SetEnvPrefix("HMY") // will be uppercased automatically
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envViper.AutomaticEnv()
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return envViper
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}
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// CreateConfFileViper creates viper to read from config file
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// Now the config file is JSON type, name is "config.json"
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func CreateConfFileViper(filePath, confName, confType string) *viper.Viper {
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configFileViper := viper.New()
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configFileViper.SetConfigName(confName) // name of config file (without extension)
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configFileViper.SetConfigType(confType) // REQUIRED if the config file does not have the extension in the name
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configFileViper.AddConfigPath(filePath) // look for the file in filePath
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configFileViper.AddConfigPath(".") // or look for config in the working directory
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if err := configFileViper.ReadInConfig(); err != nil {
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if _, ok := err.(viper.ConfigFileNotFoundError); !ok {
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panic(fmt.Errorf("fatal error config file: %s", err))
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}
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}
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return configFileViper
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}
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func getEnvName(sectionName string, flagName string) string {
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var buffer bytes.Buffer
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if sectionName != "" {
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buffer.WriteString("_")
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buffer.WriteString(sectionName)
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}
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buffer.WriteString("_")
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buffer.WriteString(flagName)
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return buffer.String()
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}
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func getConfName(sectionName string, flagName string) string {
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var buffer bytes.Buffer
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if sectionName != "" {
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buffer.WriteString(sectionName)
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buffer.WriteString(".")
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}
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buffer.WriteString(flagName)
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return buffer.String()
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}
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// ResetConfUInt resets UInt value to value from config files and system environment variable
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func ResetConfUInt(value *uint, envViper *viper.Viper, configFileViper *viper.Viper, sectionName string, flagName string) {
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var confRet = configFileViper.GetInt(getConfName(sectionName, flagName))
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if confRet != 0 {
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*value = uint(confRet)
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return
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}
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var envRet = envViper.GetInt(getEnvName(sectionName, flagName))
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if envRet != 0 {
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*value = uint(envRet)
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return
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}
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}
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// ResetConfInt resets INT value to value from config files and system environment variable
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func ResetConfInt(value *int, envViper *viper.Viper, configFileViper *viper.Viper, sectionName string, flagName string) {
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var confRet = configFileViper.GetInt(getConfName(sectionName, flagName))
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if confRet != 0 {
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*value = confRet
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return
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}
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var envRet = envViper.GetInt(getEnvName(sectionName, flagName))
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if envRet != 0 {
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*value = envRet
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return
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}
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}
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// ResetConfBool resets Bool value to value from config files and system environment variable
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func ResetConfBool(value *bool, envViper *viper.Viper, configFileViper *viper.Viper, sectionName string, flagName string) {
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var confRet = configFileViper.GetBool(getConfName(sectionName, flagName))
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if confRet {
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*value = confRet
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return
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}
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var envRet = envViper.GetBool(getEnvName(sectionName, flagName))
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if envRet {
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*value = envRet
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return
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}
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}
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// ResetConfString resets String value to value from config files and system environment variable
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func ResetConfString(value *string, envViper *viper.Viper, configFileViper *viper.Viper, sectionName string, flagName string) {
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var confRet = configFileViper.GetString(getConfName(sectionName, flagName))
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if confRet != "" {
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*value = confRet
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return
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}
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var envRet = envViper.GetString(getEnvName(sectionName, flagName))
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if envRet != "" {
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*value = envRet
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return
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}
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}
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