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package forgepb
// functions to import and export the protobuf
// data to and from config files
import (
"errors"
"os"
"path/filepath"
"go.wit.com/log"
)
// writes out the cluster information it seperate files
// to make it humanly possible to hand edit things as needed
func (m *Repos) ConfigSave() error {
data, err := m.Marshal()
if err != nil {
log.Info("proto.Marshal() failed len", len(data), err)
return err
}
log.Info("proto.Marshal() worked len", len(data))
configWrite("forge.pb", data)
s := m.FormatTEXT()
configWrite("forge.text", []byte(s))
return nil
}
func (m *Repos) ConfigLoad() error {
var data []byte
var err error
if m == nil {
return errors.New("It's not safe to run ConfigLoad() on a nil ?")
}
if data, err = loadFile("forge.pb"); err != nil {
// something went wrong loading the file
return err
}
if data != nil {
// this means the forge.pb file exists and was read
if len(data) == 0 {
// todo: error out if the file is empty?
// try forge.text & forge.json?
}
if err = m.Unmarshal(data); err != nil {
log.Warn("broken forge.pb config file")
return err
}
return nil
}
// forge.db doesn't exist. try forge.text
// this lets the user hand edit the config
if data, err = loadFile("forge.text"); err != nil {
// something went wrong loading the file
return err
}
if data != nil {
// this means the forge.text file exists and was read
if len(data) == 0 {
// todo: error out if the file is empty?
}
if err = m.UnmarshalTEXT(data); err != nil {
log.Warn("broken forge.text config file")
return err
}
return nil
}
// first time user. make a template config file
return nil
}
func loadFile(filename string) ([]byte, error) {
homeDir, err := os.UserHomeDir()
p := filepath.Join(homeDir, ".config/forge")
fullname := filepath.Join(p, filename)
data, err := os.ReadFile(fullname)
if errors.Is(err, os.ErrNotExist) {
// if file does not exist, just return nil. this
// will cause ConfigLoad() to try the next config file like "forge.text"
// because the user might want to edit the .config by hand
return nil, nil
}
if err != nil {
// log.Info("open config file :", err)
return nil, err
}
return data, nil
}
func configWrite(filename string, data []byte) error {
homeDir, err := os.UserHomeDir()
p := filepath.Join(homeDir, ".config/forge")
fname := filepath.Join(p, filename)
cfgfile, err := os.OpenFile(fname, os.O_RDWR|os.O_CREATE, 0666)
defer cfgfile.Close()
if err != nil {
log.Warn("open config file :", err)
return err
}
cfgfile.Write(data)
return nil
}
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