Added descriptive strings to errors

main.go

@@ -42,7 +42,7 @@ func get_config(config_dir string) (*Config, error) {
 
 	err := os.MkdirAll(config_dir, 0755)
 	if err != nil {
-		return &config, err
+		return &config, fmt.Errorf("ERROR: Could not create config directory: %v", err)
 	}
 
 	config_path := filepath.Join(config_dir, "server.toml")
@@ -54,19 +54,19 @@ func get_config(config_dir string) (*Config, error) {
 	defer config_file.Close()
 
 	if err != nil {
-		return &config, err
+		return &config, fmt.Errorf("ERROR: Could not open config file: %v", err)
 	}
 
 	fi, err := config_file.Stat()
 	if err != nil {
-		return &config, err
+		return &config, fmt.Errorf("ERROR: Could not get config file size: %v", err)
 	}
 
 	if fi.Size() == 0 {
 		// if file is empty, write default config
 		data, err := toml.Marshal(config)
 		if err != nil {
-			return &config, err
+			return &config, fmt.Errorf("ERROR: Could not write default config to file: %v", err)
 		}
 		config_file.Write(data)
 		// return nil as the user must edit the config file
@@ -75,11 +75,11 @@ func get_config(config_dir string) (*Config, error) {
 		// try to parse config file
 		data, err := ioutil.ReadAll(config_file)
 		if err != nil {
-			return &config, err
+			return &config, fmt.Errorf("ERROR: Could not read data from config file: %v", err)
 		}
 		err = toml.Unmarshal(data, &config)
 		if err != nil {
-			return &config, err
+			return &config, fmt.Errorf("ERROR: Colud not parse config file contents: %v", err)
 		}
 		return &config, nil
 	}