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117 lines
3.4 KiB
117 lines
3.4 KiB
package cfg
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import (
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"fmt"
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"os"
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"github.com/BurntSushi/toml"
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)
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// Touch config file
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func Touch() error {
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path, err := getConfigPath()
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if err != nil {
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return fmt.Errorf("could not get config file path: %w", err)
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}
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file, err := os.OpenFile(path, os.O_CREATE|os.O_APPEND|os.O_WRONLY, 0666)
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if err != nil {
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return fmt.Errorf("could not open/create config file: %w", err)
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}
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err = file.Close()
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if err != nil {
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return fmt.Errorf("could not close config file: %w", err)
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}
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return nil
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}
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// Migrate old config versions to current config version
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// returns true if any changes were made to the config
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func Migrate() (bool, error) {
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path, err := getConfigPath()
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if err != nil {
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return false, fmt.Errorf("could not get config file path: %w", err)
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}
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configF, err := readConfig(path)
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if err != nil {
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return false, fmt.Errorf("could not read config: %w", err)
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}
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const current = "v1"
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if configF.ConfigVersion != nil && *configF.ConfigVersion == current {
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return false, nil
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}
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if configF.ConfigVersion == nil {
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configF, err = legacyToV1(configF)
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if err != nil {
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return true, fmt.Errorf("error converting config from version 'legacy' to 'v1': %w", err)
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}
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}
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if *configF.ConfigVersion != current {
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return false, fmt.Errorf("unrecognized config version: '%s'", *configF.ConfigVersion)
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}
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err = writeConfig(configF, path)
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if err != nil {
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return true, fmt.Errorf("could not write migrated config: %w", err)
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}
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return true, nil
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}
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// writeConfig should only be used when migrating config to new version
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// writing the config file discards all comments in the config file (limitation of TOML library)
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// to make up for lost comments we add header comment to the start of the file
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func writeConfig(config *configFile, path string) error {
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file, err := os.OpenFile(path, os.O_RDWR|os.O_TRUNC, 0666)
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if err != nil {
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return fmt.Errorf("could not open config for writing: %w", err)
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}
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defer file.Close()
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_, err = file.WriteString(headerComment)
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if err != nil {
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return fmt.Errorf("could not write config header: %w", err)
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}
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err = toml.NewEncoder(file).Encode(config)
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if err != nil {
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return fmt.Errorf("could not encode config: %w", err)
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}
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return nil
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}
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func legacyToV1(config *configFile) (*configFile, error) {
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if config.ConfigVersion != nil {
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return nil, fmt.Errorf("config version is not 'legacy': '%s'", *config.ConfigVersion)
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}
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version := "v1"
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newConf := configFile{
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ConfigVersion: &version,
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}
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// Remove defaults
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if config.Port != nil && *config.Port != 2627 {
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newConf.Port = config.Port
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}
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if config.SesswatchPeriodSeconds != nil && *config.SesswatchPeriodSeconds != 120 {
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newConf.SesswatchPeriodSeconds = config.SesswatchPeriodSeconds
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}
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if config.SesshistInitHistorySize != nil && *config.SesshistInitHistorySize != 1000 {
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newConf.SesshistInitHistorySize = config.SesshistInitHistorySize
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}
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if config.BindControlR != nil && *config.BindControlR != true {
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newConf.BindControlR = config.BindControlR
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}
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if config.Debug != nil && *config.Debug != false {
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newConf.Debug = config.Debug
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}
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return &newConf, nil
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}
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// func v1ToV2(config *configFile) (*configFile, error) {
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// if *config.ConfigVersion != "v1" {
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// return nil, fmt.Errorf("config version is not 'legacy': '%s'", *config.ConfigVersion)
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// }
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// version := "v2"
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// newConf := configFile{
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// ConfigVersion: &version,
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// // Here goes all config fields - no need to prune defaults like we do for legacy
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// }
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// return &newConf, nil
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// }
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