public static void Help(Type t_cfg)
{
var asm = t_cfg == null ? null : t_cfg.Assembly;
if (t_cfg != null)
{
var @params = t_cfg.GetProperties(BF.AllInstance)
.Where(p => p.HasAttr <ParamAttribute>()).OrderBy(p => p.Attr <ParamAttribute>().Priority).ToReadOnly();
var cfg_name = t_cfg.Attr <ConfigAttribute>().Name ?? asm.GetName().Name;
var s_syntax = String.Format("Syntax: {0}", cfg_name);
foreach (var p in @params)
{
var is_optional = t_cfg.GetProperty("Default" + p.Name, BF.AllStatic) != null;
var alias = p.Attr <ParamAttribute>().Aliases.First();
s_syntax += String.Format(" {0}-{1}:{2}{3}", is_optional ? "[" : "", alias, p.Name, is_optional ? "]" : "");
}
s_syntax += " [/verbose]";
Console.WriteLine(s_syntax);
var shortcuts = t_cfg.Attrs <ShortcutAttribute>().OrderBy(shortcut => shortcut.Priority);
if (shortcuts.IsNotEmpty())
{
Console.EnsureBlankLine();
if (shortcuts.Count() == 1)
{
Console.WriteLine("Shortcut: ");
}
else
{
Console.WriteLine("Shortcuts:"); Console.Write(" ");
}
shortcuts.ForEach((shortcut, i) =>
{
shortcut.Description.AssertNull();
Console.WriteLine(cfg_name + (shortcut.Schema.IsNullOrEmpty() ? "" : (" " + shortcut.Schema)));
if (i != shortcuts.Count() - 1)
{
Console.Write(" ");
}
});
}
Console.EnsureBlankLine();
Console.WriteLine("Parameters:");
var max_name = @params.MaxOrDefault(p => p.Name.Length);
max_name = Math.Max("/verbose".Length, max_name);
var feed = new String(' ', 4 + 1 + max_name + 2);
var max_desc = 80 - feed.Length;
(max_desc > 0).AssertTrue();
Action <String, String> write_name_desc = (name, desc) =>
{
Console.Write(String.Format(" {0}{1}{2} ",
name.StartsWith("/") ? "" : "%",
name.PadRight(max_name),
name.StartsWith("/") ? " " : ""));
var num_lines = (int)Math.Ceiling(1.0 * desc.Length / max_desc);
for (var i = 0; i < num_lines; ++i)
{
if (i != 0)
{
Console.Write(feed);
}
var line = desc.Substring(i * max_desc, Math.Min(max_desc, desc.Length - i * max_desc));
Console.WriteLine(line);
}
};
foreach (var p in @params)
{
var desc = p.Attr <ParamAttribute>().Description ?? String.Empty;
var p_default = t_cfg.GetProperty("Default" + p.Name, BindingFlags.Static | BindingFlags.Public | BindingFlags.NonPublic);
if (p_default != null)
{
var default_value = p_default.GetValue(null, null);
if (default_value != null)
{
var s_default_value = default_value == null ? "null" : default_value.ToString();
if (default_value is DirectoryInfo)
{
var dir = default_value as DirectoryInfo;
if (dir.FullName == Environment.CurrentDirectory)
{
s_default_value = "current dir";
}
}
var s_default = String.Format("Defaults to {0}.", s_default_value);
if (!String.IsNullOrEmpty(desc))
{
if (!desc.EndsWith("."))
{
desc += ".";
}
desc += " ";
}
desc += s_default;
}
}
if (!String.IsNullOrEmpty(desc))
{
write_name_desc(p.Name, desc);
}
}
write_name_desc("/verbose", "Turns verbose tracing on, useful for debugging.");
}
}
