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config.go
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config.go
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/*
* Copyright (c) 2023. Raft, LLC
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
package helpers
import (
"os"
"github.com/spf13/cobra"
"github.com/spf13/viper"
)
func Config(cmd *cobra.Command) (*viper.Viper, error) {
if cmd == nil {
panic("cmd must not be nil")
}
cfg := viper.New()
// Support env variables prefixed with SYNCD_
cfg.SetEnvPrefix("syncd")
cfg.AutomaticEnv()
// Load config from file
var src []string
if s := os.Getenv("SYNCD_CONFIG"); s != "" {
src = []string{s}
}
if s, _ := cmd.Flags().GetStringSlice("config"); len(s) > 0 {
src = s
}
for _, s := range src {
cfg.SetConfigFile(s)
if err := cfg.MergeInConfig(); err != nil {
return nil, WrapError(err, 2)
}
}
if err := cfg.BindPFlags(cmd.Flags()); err != nil {
return nil, WrapError(err, 2)
}
return cfg, nil
}
type StringValue struct {
Value string
FromEnv string
}
func (sv *StringValue) GetValue() string {
var val string
if val = sv.Value; val == "" {
if e := sv.FromEnv; e != "" {
val = os.Getenv(e)
}
}
return val
}