Add visibility parameters to control scope of generated extension

Sources/ResgenSwift/Images/ImagesOptions.swift

@@ -7,27 +7,54 @@
 
 import ArgumentParser
 import Foundation
+import ToolCore
 
 // swiftlint:disable no_grouping_extension
 
 struct ImagesOptions: ParsableArguments {
 
-    @Flag(name: .customShort("f"), help: "Should force script execution")
+    @Flag(
+        name: .customShort("f"),
+        help: "Should force script execution"
+    )
     var forceExecution = false
 
-    @Flag(name: .customShort("F"), help: "Regenerate all images")
+    @Flag(
+        name: .customShort("F"),
+        help: "Regenerate all images"
+    )
     var forceExecutionAndGeneration = false
 
-    @Argument(help: "Input files where strings ared defined.", transform: { $0.replaceTiltWithHomeDirectoryPath() })
+    @Argument(
+        help: "Input files where strings ared defined.",
+        completion: .file(),
+        transform: { $0.replaceTiltWithHomeDirectoryPath() }
+    )
     var inputFile: String
 
-    @Option(help: "Xcassets path where to generate images.", transform: { $0.replaceTiltWithHomeDirectoryPath() })
+    @Option(
+        help: "Xcassets path where to generate images.",
+        transform: { $0.replaceTiltWithHomeDirectoryPath() }
+    )
     var xcassetsPath: String
 
-    @Option(help: "Tell if it will generate static properties or not")
+    @Option(
+        help: "Tell if it will generate static properties or not",
+        completion: .list(["true", "false"])
+    )
     var staticMembers: Bool = false
 
-    @Option(help: "Path where to generate the extension.", transform: { $0.replaceTiltWithHomeDirectoryPath() })
+    @Option(
+        name: .customLong("visibility"),
+        help: "Visibility of extension and properties. Possibles values: public, private, package, internal. Default is internal",
+        completion: .list(["public", "private", "package", "internal"])
+    )
+    var extensionVisibility: ExtensionVisibility = .internal
+
+    @Option(
+        help: "Path where to generate the extension.",
+        transform: { $0.replaceTiltWithHomeDirectoryPath() }
+    )
     var extensionOutputPath: String?
 
     @Option(help: "SwiftUI extension name. If not specified, no extension will be generated.")