Add support for writing modified config file to disk

config.go

@@ -27,49 +27,68 @@ func getConfigDir(n string) string {
 }
 
 func (c *Config[T]) Get() (bool, error) {
-	config_dir := getConfigDir(c.Name)
+	configDir := getConfigDir(c.Name)
 
-	err := os.MkdirAll(config_dir, 0755)
+	err := os.MkdirAll(configDir, 0755)
 	if err != nil {
-		return false, fmt.Errorf("Could not create config directory: %v", err)
+		return false, fmt.Errorf("Could not create config directory: %w", err)
 	}
 
-	configFile := filepath.Join(config_dir, c.Filename+".toml")
+	configFilepath := filepath.Join(configDir, c.Filename+".toml")
-	c.ConfigFile = &configFile
+	c.ConfigFile = &configFilepath
 
 	// open file, creating it if empty
-	config_file, err := os.OpenFile(*c.ConfigFile, os.O_RDWR|os.O_CREATE, 0755)
+	configFile, err := os.OpenFile(*c.ConfigFile, os.O_RDWR|os.O_CREATE, 0755)
-	defer config_file.Close()
+	defer configFile.Close()
 
 	if err != nil {
-		return false, fmt.Errorf("Could not open config file: %v", err)
+		return false, fmt.Errorf("Could not open config file: %w", err)
 	}
 
-	fi, err := config_file.Stat()
+	fi, err := configFile.Stat()
 	if err != nil {
-		return false, fmt.Errorf("Could not get config file size: %v", err)
+		return false, fmt.Errorf("Could not get config file size: %w", err)
 	}
 
 	if fi.Size() == 0 {
 		// if file is empty, write default config
 		data, err := toml.Marshal(c.Config)
 		if err != nil {
-			return false, fmt.Errorf("Could not write default config to file: %v", err)
+			return false, fmt.Errorf("Could not write default config to file: %w", err)
 		}
-		config_file.Write(data)
+		configFile.Write(data)
 		// return nil as the user must edit the config file
 		return true, nil
 	} else {
 		// try to parse config file
-		data, err := ioutil.ReadAll(config_file)
+		data, err := ioutil.ReadAll(configFile)
 		if err != nil {
-			return false, fmt.Errorf("Could not read data from config file: %v", err)
+			return false, fmt.Errorf("Could not read data from config file: %w", err)
 		}
 		err = toml.Unmarshal(data, &c.Config)
 		if err != nil {
-			return false, fmt.Errorf("Could not parse config file contents: %v", err)
+			return false, fmt.Errorf("Could not parse config file contents: %w", err)
 		}
 		return false, nil
 	}
 
 }
+
+func (c *Config[T]) Write() error {
+	configDir := getConfigDir(c.Name)
+	configFilepath := filepath.Join(configDir)
+
+	data, err := toml.Marshal(c.Config)
+	if err != nil {
+		return fmt.Errorf("Could not marshal config: %w", err)
+	}
+
+	configFile, err := os.OpenFile(*c.ConfigFile, os.O_RDWR, 0755)
+	defer configFile.Close()
+
+	_, err = configFile.Write(data)
+	if err != nil {
+		return fmt.Errorf("Could not write to config file: %w", err)
+	}
+	return nil
+}