forked from golang/config
79 lines
1.8 KiB
Go
79 lines
1.8 KiB
Go
package config
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import (
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"fmt"
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"github.com/pelletier/go-toml/v2"
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"io/ioutil"
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"os"
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"path/filepath"
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)
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type Config[T any] struct {
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Name string
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Filename string
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Config T
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}
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func getConfigDir(n string) string {
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// Find config directory
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// Linux (XDG base directory specification compliant)
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xdg_config_home := os.Getenv("XDG_CONFIG_HOME")
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var base string
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if xdg_config_home != "" {
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base = xdg_config_home
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} else {
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home := os.Getenv("HOME")
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base = filepath.Join(home, ".config")
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}
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return filepath.Join(base, n)
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}
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func (c Config[T]) Get() (bool, error) {
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config_dir := getConfigDir(c.Name)
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err := os.MkdirAll(config_dir, 0755)
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if err != nil {
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return false, fmt.Errorf("Could not create config directory: %v", err)
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}
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config_path := filepath.Join(config_dir, c.Filename+".toml")
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// open file, creating it if empty
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config_file, err := os.OpenFile(config_path, os.O_RDWR|os.O_CREATE, 0755)
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defer config_file.Close()
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if err != nil {
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return false, fmt.Errorf("Could not open config file: %v", err)
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}
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fi, err := config_file.Stat()
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if err != nil {
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return false, fmt.Errorf("Could not get config file size: %v", err)
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}
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if fi.Size() == 0 {
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// if file is empty, write default config
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data, err := toml.Marshal(c.Config)
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if err != nil {
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return false, fmt.Errorf("Could not write default config to file: %v", err)
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}
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config_file.Write(data)
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// return nil as the user must edit the config file
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return true, nil
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} else {
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// try to parse config file
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data, err := ioutil.ReadAll(config_file)
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if err != nil {
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return false, fmt.Errorf("Could not read data from config file: %v", err)
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}
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err = toml.Unmarshal(data, &c.Config)
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if err != nil {
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return false, fmt.Errorf("Could not parse config file contents: %v", err)
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}
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return false, nil
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}
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}
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