57 lines
1.7 KiB
Go
57 lines
1.7 KiB
Go
package config
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import (
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"os"
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"strings"
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"github.com/goraz/onion"
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"github.com/rs/zerolog"
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)
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/* GetConfLoader
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* Get the configuration loader for the application
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* Parameters:
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* - AppName: string : the name of the application
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* Returns:
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* - *onion.Onion : the configuration loader
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* The configuration loader will load the configuration from the following sources:
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* - the environment variables with the prefix APPNAME_
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* - the file /etc/oc/appname.json
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* - the file ./appname.json
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* The configuration loader will merge the configuration from the different sources
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* The configuration loader will give priority to the environment variables
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* The configuration loader will give priority to the local file over the default file
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*/
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func GetConfLoader() *onion.Onion {
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logger := zerolog.New(os.Stdout).With().Timestamp().Logger()
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AppName := GetAppName()
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EnvPrefix := strings.ToUpper(AppName[0:2]+AppName[3:]) + "_"
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defaultConfigFile := "/etc/oc/" + AppName[3:] + ".json"
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localConfigFile := "./" + AppName[3:] + ".json"
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var configFile string
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var o *onion.Onion
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l3 := onion.NewEnvLayerPrefix("_", EnvPrefix)
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l2, err := onion.NewFileLayer(localConfigFile, nil)
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if err == nil {
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logger.Info().Msg("Local config file found " + localConfigFile + ", overriding default file")
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configFile = localConfigFile
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}
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l1, err := onion.NewFileLayer(defaultConfigFile, nil)
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if err == nil {
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logger.Info().Msg("Config file found : " + defaultConfigFile)
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configFile = defaultConfigFile
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}
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if configFile == "" {
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logger.Info().Msg("No config file found, using env")
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o = onion.New(l3)
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} else if l1 != nil && l2 != nil {
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o = onion.New(l1, l2, l3)
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} else if l1 == nil {
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o = onion.New(l2, l3)
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} else if l2 == nil {
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o = onion.New(l1, l3)
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}
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return o
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}
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