.cgincファイルを作る、EditorScript

CreateCginc.cs

using UnityEngine;
using UnityEditor;
using System.IO;

public class CreateCgincExtent{
	[MenuItem("Assets/Create/cginc file")]
	public static void CreateCginc()
	{
		var path = GetCurrentProjectWindowPath();
		path = Path.Combine(path, "newCginc.cginc");
		path = AssetDatabase.GenerateUniqueAssetPath(path);

		File.WriteAllText(path, "#ifndef NEW_CGINC\n#define NEW_CGINC\n\n#endif");
		AssetDatabase.SaveAssets();
		AssetDatabase.Refresh();
	}

	static string GetCurrentProjectWindowPath()
	{
		var o = Selection.GetFiltered(typeof(Object), SelectionMode.Assets)[0];
		var path = AssetDatabase.GetAssetPath(o);
		if (!AssetDatabase.IsValidFolder(path))
			path = Path.GetDirectoryName(path);
		return path;
	}
}