Refactor in one unique command with subcommand + add a new command to generate ressources from a configuration file

Sources/ResgenSwift/Strings/Stringium/StringiumError.swift

@@ -0,0 +1,38 @@
+//
+//  StringToolError.swift
+//  
+//
+//  Created by Thibaut Schmitt on 05/01/2022.
+//
+
+import Foundation
+
+enum StringiumError: Error {
+    case fileNotExists(String)
+    case langsListEmpty
+    case defaultLangsNotInLangs
+    case writeFile(String, String)
+    case langNotDefined(String, String, Bool)
+    
+    var localizedDescription: String {
+        switch self {
+        case .fileNotExists(let filename):
+            return " error:[\(Stringium.toolName)] File \(filename) does not exists "
+            
+        case .langsListEmpty:
+            return " error:[\(Stringium.toolName)] Langs list is empty"
+            
+        case .defaultLangsNotInLangs:
+            return " error:[\(Stringium.toolName)] Langs list does not contains the default lang"
+            
+        case .writeFile(let subErrorDescription, let filename):
+            return " error:[\(Stringium.toolName)] An error occured while writing content to \(filename): \(subErrorDescription)"
+            
+        case .langNotDefined(let lang, let definitionName, let isReference):
+            if isReference {
+                return " error:[\(Stringium.toolName)] Reference are handled only by TwineTool. Please use it or remove reference from you strings file."
+            }
+            return " error:[\(Stringium.toolName)] Lang \"\(lang)\" not found for \"\(definitionName)\""
+        }
+    }
+}