71 lines
1.5 KiB
Go
71 lines
1.5 KiB
Go
package config
|
|
|
|
// functions to import and export the protobuf
|
|
// data to and from config files
|
|
|
|
import (
|
|
"errors"
|
|
"os"
|
|
"path/filepath"
|
|
|
|
"go.wit.com/log"
|
|
"google.golang.org/protobuf/encoding/prototext"
|
|
"google.golang.org/protobuf/proto"
|
|
)
|
|
|
|
/*
|
|
// loads a file from ~/.config/<argname>/
|
|
func Load(argname string) ([]byte, string) {
|
|
}
|
|
*/
|
|
|
|
var ErrEmpty error = log.Errorf("file was empty")
|
|
|
|
// returns:
|
|
// - Full path to the config file. usually: ~/.config/<argname>
|
|
// - []byte : the contents of the file
|
|
// - error on read
|
|
func ConfigLoad(pb proto.Message, argname string, protoname string) error {
|
|
var data []byte
|
|
var fullname string
|
|
homeDir, err := os.UserHomeDir()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
|
|
fullname = filepath.Join(homeDir, ".config", argname, protoname+".text")
|
|
|
|
if data, err = loadFile(fullname); err != nil {
|
|
log.Warn("config file failed to load", err)
|
|
// set pb.Filename that was attempted
|
|
SetFilename(pb, fullname)
|
|
return err
|
|
}
|
|
|
|
// don't even bother with Marshal()
|
|
if data == nil {
|
|
return ErrEmpty // file is empty
|
|
}
|
|
|
|
// Unmarshal()
|
|
if err = prototext.Unmarshal(data, pb); err != nil {
|
|
return err
|
|
}
|
|
|
|
log.Infof("ConfigLoad() arg=%s, proto=%s\n", argname, protoname)
|
|
return nil
|
|
}
|
|
|
|
func loadFile(fullname string) ([]byte, error) {
|
|
data, err := os.ReadFile(fullname)
|
|
if errors.Is(err, os.ErrNotExist) {
|
|
// if file does not exist, just return nil. this
|
|
return nil, err
|
|
}
|
|
if err != nil {
|
|
// log.Info("open config file :", err)
|
|
return nil, err
|
|
}
|
|
return data, nil
|
|
}
|