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package zoopb
// 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/proto"
)
// writes out the cluster information it seperate files
// to make it humanly possible to hand edit things as needed
func (m *Machines) 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(data)
return nil
}
// when running on a single machine, save the file in forge/
// as <hostname>.pb
// write to ~/.config/forge/ unless ENV{FORGE_HOME} is set
func (m *Machine) ConfigSave() error {
if os.Getenv("FORGE_HOME") == "" {
homeDir, _ := os.UserHomeDir()
fullpath := filepath.Join(homeDir, ".config/forge")
os.Setenv("FORGE_HOME", fullpath)
}
data, err := m.Marshal()
if err != nil {
log.Info("proto.Marshal() failed len", len(data), err)
return err
}
log.Info("ConfigSave() proto.Marshal() worked len", len(data))
hostname, _ := os.Hostname()
fname := hostname + ".pb"
return m.configWrite(fname, data)
}
func ConfigSaveRaw(data []byte) error {
configWrite(data)
return nil
}
func (m *Machines) ConfigLoad() error {
if m == nil {
return errors.New("It's not safe to run ConfigLoad() on a nil ?")
}
if data, err := loadFile("zookeeper.pb"); err == nil {
if err = proto.Unmarshal(data, m); err != nil {
log.Warn("broken zookeeper.pb config file")
return err
}
} else {
return err
}
return nil
}
func (m *Machine) ConfigLoad() error {
if m == nil {
return errors.New("It's not safe to run ConfigLoad() on a nil ?")
}
if os.Getenv("FORGE_HOME") == "" {
homeDir, _ := os.UserHomeDir()
fullpath := filepath.Join(homeDir, ".config/forge")
os.Setenv("FORGE_HOME", fullpath)
}
hostname, _ := os.Hostname()
fname := hostname + ".pb"
var data []byte
var err error
if data, err = loadFile(fname); err != nil {
// something went wrong loading the file
return err
}
if data != nil {
if err = proto.Unmarshal(data, m); err != nil {
log.Warn("broken zookeeper.pb config file", fname)
return err
}
return nil
}
m.Hostname = hostname
m.Distro = detectDistro()
m.initPackages()
log.Info("zoopb.ConfigLoad()", m.Hostname, "runs", m.Distro, "with", m.Packages.Len(), "packages")
return nil
}
func loadFile(filename string) ([]byte, error) {
homeDir, err := os.UserHomeDir()
p := filepath.Join(homeDir, ".config/zookeeper")
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 (m *Machine) loadFile(fname string) ([]byte, error) {
fullname := filepath.Join(os.Getenv("FORGE_HOME"), fname)
data, err := os.ReadFile(fullname)
if err != nil {
// log.Info("open config file :", err)
return nil, err
}
return data, nil
}
func configWrite(data []byte) error {
homeDir, err := os.UserHomeDir()
p := filepath.Join(homeDir, ".config/zookeeper")
fname := filepath.Join(p, "zookeeper.pb")
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
}
func (m *Machine) configWrite(fname string, data []byte) error {
fullname := filepath.Join(os.Getenv("FORGE_HOME"), fname)
cfgfile, err := os.OpenFile(fullname, 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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