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helpers.go
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/
helpers.go
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// (c) 2021, AXIA Systems, Inc. All rights reserved.
// See the file LICENSE for licensing terms.
package cfg
import (
"bytes"
"log"
"github.com/spf13/viper"
)
func newViper() *viper.Viper {
v := viper.NewWithOptions(viper.KeyDelimiter("_"))
v.SetEnvPrefix(appName)
v.AutomaticEnv()
v.SetConfigType("json")
// Add defaults
if err := v.ReadConfig(bytes.NewBufferString(defaultJSON)); err != nil {
log.Printf("Failed to read default config: %s", err.Error())
}
return v
}
func newViperFromFile(filePath string) (*viper.Viper, error) {
// Get default viper
v := newViper()
// Read config from file
v.SetConfigFile(filePath)
if err := v.MergeInConfig(); err != nil {
return nil, err
}
return v, nil
}
func newSubViper(v *viper.Viper, name string) *viper.Viper {
if v == nil {
return newViper()
}
v = v.Sub(name)
if v == nil {
return newViper()
}
v.SetEnvPrefix(appName + "_" + name)
v.AutomaticEnv()
return v
}
func newChainsConfig(v *viper.Viper) (Chains, error) {
chainsConf := v.GetStringMap(keysChains)
chains := make(Chains, len(chainsConf))
for _, chainConf := range chainsConf {
confMap, ok := chainConf.(map[string]interface{})
if !ok {
return nil, ErrChainsConfigMustBeStringMap
}
// Check for empty values
switch {
case confMap[keysChainsID] == nil:
return nil, ErrChainsConfigIDEmpty
case confMap[keysChainsVMType] == nil:
return nil, ErrChainsConfigVMEmpty
}
// Convert to proper types
id, ok := confMap[keysChainsID].(string)
if !ok {
return nil, ErrChainsConfigIDNotString
}
vmType, ok := confMap[keysChainsVMType].(string)
if !ok {
return nil, ErrChainsConfigVMNotString
}
chains[id] = Chain{ID: id, VMType: vmType}
}
return chains, nil
}