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