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package main
// functions to import and export the protobuf
// data to and from config files
import (
"errors"
"fmt"
"os"
"path/filepath"
"go.wit.com/log"
)
func (m *Portmaps) ConfigSave() error {
if m == nil {
return fmt.Errorf("ConfigSave() nil")
}
s := m.FormatTEXT()
log.Info("proto.Marshal() worked len", len(s))
configWrite(argv.Config, []byte(s))
return nil
}
func ConfigLoad() *Portmaps {
var fullname string
if os.Getenv("CLOUD_HOME") != "" {
fullname = filepath.Join(os.Getenv("CLOUD_HOME"), "gus.text")
if argv.Config == "" {
argv.Config = fullname
}
}
if argv.Config != "" {
fullname = argv.Config
}
if fullname == "" {
homeDir, _ := os.UserHomeDir()
fullname = filepath.Join(homeDir, ".config/cloud", "gus.text")
argv.Config = fullname
}
var data []byte
var err error
if data, err = loadFile(fullname); err != nil {
log.Warn("config file failed to load", err)
// something went wrong loading the file
return nil
}
if data == nil {
return nil
}
p := new(Portmaps)
if err = p.UnmarshalTEXT(data); err != nil {
log.Warn("unmarshal failed on config file", err)
return nil
}
log.Log(INFO, "gus.ConfigLoad() has", p.Len(), "port mappings")
return p
}
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, nil
}
if err != nil {
// log.Info("open config file :", err)
return nil, err
}
return data, nil
}
func (m *Portmaps) loadFile(fullname string) ([]byte, error) {
data, err := os.ReadFile(fullname)
if err != nil {
// log.Info("open config file :", err)
return nil, err
}
return data, nil
}
func configWrite(fullname string, data []byte) error {
if _, base := filepath.Split(fullname); base == "" {
return fmt.Errorf("--config option not set")
}
cfgfile, err := os.OpenFile(fullname, os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0644)
defer cfgfile.Close()
if err != nil {
log.Warn("open config file :", err)
return err
}
cfgfile.Write(data)
return nil
}
func (m *Portmaps) configWrite(fullname string, data []byte) error {
if _, base := filepath.Split(fullname); base == "" {
return fmt.Errorf("--config option not set")
}
cfgfile, err := os.OpenFile(fullname, os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0644)
defer cfgfile.Close()
if err != nil {
log.Warn("open config file :", err)
return err
}
cfgfile.Write(data)
return nil
}
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