add check for empty config file

README.md

@@ -1,6 +1,6 @@
 # JETY
 
-JSON, ENV, YAML, TOML
+JSON, ENV, TOML, YAML
 
 This is a package for collapsing multiple configuration stores (env+json, env+yaml, env+toml) and writing them back to a centralized config.
 

getters.go

@@ -143,8 +143,17 @@ func (c *ConfigManager) GetStringSlice(key string) []string {
 		}
 	}
 	switch val := v.Value.(type) {
-	case []string:
-		return val
+	case []any:
+		var ret []string
+		for _, v := range val {
+			switch v := v.(type) {
+			case string:
+				ret = append(ret, v)
+			default:
+				ret = append(ret, fmt.Sprintf("%v", v))
+			}
+		}
+		return ret
 	default:
 		return nil
 	}
@@ -191,8 +200,29 @@ func (c *ConfigManager) GetIntSlice(key string) []int {
 		}
 	}
 	switch val := v.Value.(type) {
-	case []int:
-		return val
+	case []any:
+		var ret []int
+		for _, v := range val {
+			switch v := v.(type) {
+			case int:
+				ret = append(ret, v)
+			case string:
+				i, err := strconv.Atoi(v)
+				if err != nil {
+					continue
+				}
+				ret = append(ret, i)
+			case float32:
+				ret = append(ret, int(v))
+			case float64:
+				ret = append(ret, int(v))
+			case nil:
+				continue
+			default:
+				continue
+			}
+		}
+		return ret
 	default:
 		return nil
 	}

jety.go

@@ -41,7 +41,10 @@ type (
 	}
 )
 
-var ErrConfigFileNotFound = errors.New("config File Not Found")
+var (
+	ErrConfigFileNotFound = errors.New("config file not found")
+	ErrConfigFileEmpty    = errors.New("config file is empty")
+)
 
 func NewConfigManager() *ConfigManager {
 	cm := ConfigManager{}
@@ -162,8 +165,6 @@ func (c *ConfigManager) SetEnvPrefix(prefix string) {
 }
 
 func (c *ConfigManager) ReadInConfig() error {
-	c.mutex.Lock()
-	defer c.mutex.Unlock()
 	// assume config = map[string]any
 	confFileData, err := readFile(c.configFileUsed, c.configType)
 	if err != nil {
@@ -174,12 +175,21 @@ func (c *ConfigManager) ReadInConfig() error {
 		lower := strings.ToLower(k)
 		conf[lower] = ConfigMap{Key: k, Value: v}
 	}
+	c.mutex.Lock()
 	c.mapConfig = conf
+	c.mutex.Unlock()
+	c.collapse()
 	return nil
 }
 
 func readFile(filename string, fileType configType) (map[string]any, error) {
 	fileData := make(map[string]any)
+	if d, err := os.Stat(filename); os.IsNotExist(err) {
+		return nil, ErrConfigFileNotFound
+	} else if d.Size() == 0 {
+		return nil, ErrConfigFileEmpty
+	}
+
 	switch fileType {
 	case ConfigTypeTOML:
 		_, err := toml.DecodeFile(filename, &fileData)

setters.go

@@ -40,5 +40,7 @@ func (c *ConfigManager) SetDefault(key string, value any) {
 		} else {
 			c.combinedConfig[lower] = ConfigMap{Key: key, Value: value}
 		}
+	} else {
+		c.combinedConfig[lower] = c.mapConfig[lower]
 	}
 }