どこで使えるかわかりませんが、スクリプトを右クリックで #if UNITY_EDITOR
を追加する拡張を作成しました
public static class AddIf { [MenuItem("Assets/Add if UNITY_Editor")] private static void AddEditorDefine() { var guids = Selection.assetGUIDs; foreach (var guid in guids) { var path = AssetDatabase.GUIDToAssetPath(guid); var ext = System.IO.Path.GetExtension(path); if (ext != ".cs") continue; var lines = System.IO.File.ReadAllLines(path); if (HasDefine(lines)) return; ArrayUtility.Insert(ref lines, 0, "#if UNITY_EDITOR"); ArrayUtility.Insert(ref lines, lines.Length, "#endif"); System.IO.File.WriteAllLines(path, lines); AssetDatabase.ImportAsset(path); } } private static bool HasDefine(string[] lines) { foreach (var line in lines) { var trim = line.Trim(); if (trim.StartsWith("#if UNITY_EDITOR")) { return true; } if (trim.StartsWith("namespace") || trim.StartsWith("public")) { return false; } } return false; } }