public void Draw(CommandLineWriter writer)
{
List <IOption> options = new List <IOption>();
List <IArgument> arguments = new List <IArgument>();
foreach (var(methodSpecs, _, _) in mMethods)
{
options.AddRange(methodSpecs.Options);
arguments.AddRange(methodSpecs.Arguments);
}
_DrawUseage(options, arguments, writer);
if (Desc != null)
{
writer.WriteLine();
writer.WriteLine(Desc);
}
int minLength = 0;
List <string> optionExplainHeads = new();
List <string> argumentExplainHeads = new();
foreach (var option in options)
{
var head = option.GetDrawExplainHead();
if (head.Length > minLength)
{
minLength = head.Length;
}
optionExplainHeads.Add(head);
}
foreach (var argument in arguments)
{
var head = argument.GetDrawExplainHead();
if (head.Length > minLength)
{
minLength = head.Length;
}
argumentExplainHeads.Add(head);
}
foreach (var command in Subcommands)
{
if (command.Name.Length > minLength)
{
minLength = command.Name.Length;
}
}
_DrawOptions(options, optionExplainHeads, writer, minLength);
_DrawArguments(arguments, argumentExplainHeads, writer, minLength);
_DrawSubcommands(writer, minLength);
writer.WriteLine();
writer.WriteLine($"See '{Name} help <subcommand>' to read about a specific subcommand.");
}
private static void _WriteDesc(CommandLineWriter writer, string?desc)
{
if (desc != null)
{
var oldLevel = writer.IndentLevel;
writer.IndentLevel = writer.CurCharCount;
writer.Write(desc, true);
writer.IndentLevel = oldLevel;
}
}
private void _DrawSubcommands(CommandLineWriter writer, int minLength)
{
if (mGroup2Subcommands.Count <= 0)
{
return;
}
writer.WriteLine();
writer.WriteLine("Available subcommands");
writer.IncreaseIndent();
foreach (var group in mGroups)
{
if (mGroups.Count > 1)
{
writer.WriteLine(group);
writer.IncreaseIndent();
}
var commands = mGroup2Subcommands[group];
foreach (var(command, _) in commands)
{
var head = _FillHead(minLength, command.Name);
writer.Write(head);
_WriteDesc(writer, command.Desc);
writer.WriteLine();
}
if (mGroups.Count > 1)
{
writer.DecreaseIndent();
}
}
writer.DecreaseIndent();
}
private void _DrawArguments(IReadOnlyList <IArgument> arguments, IReadOnlyList <string> explainHeads, CommandLineWriter writer, int minLength)
{
if (arguments.Count <= 0)
{
return;
}
writer.WriteLine();
writer.WriteLine("Available args");
writer.IncreaseIndent();
for (var i = 0; i < arguments.Count; ++i)
{
var argument = arguments[i];
var head = explainHeads[i];
head = _FillHead(minLength, head);
writer.Write(head);
_WriteDesc(writer, argument.Desc);
writer.WriteLine();
}
writer.DecreaseIndent();
}
private void _DrawOptions(IReadOnlyList <IOption> options, IReadOnlyList <string> explainHeads, CommandLineWriter writer, int minLength)
{
if (options.Count <= 0)
{
return;
}
writer.WriteLine();
writer.WriteLine("Available options");
writer.IncreaseIndent();
for (int i = 0; i < options.Count; ++i)
{
var option = options[i];
var head = explainHeads[i];
head = _FillHead(minLength, head);
writer.Write(head);
_WriteDesc(writer, option.Desc);
writer.WriteLine();
}
writer.DecreaseIndent();
}
private void _DrawUseage(IEnumerable <IOption> options, IEnumerable <IArgument> arguments, CommandLineWriter writer)
{
var head = $"usage: {Name}";
writer.Write(head);
writer.IndentLevel = $"{head} ".Length;
// draw options
foreach (var option in options)
{
writer.Write($" {option.GetDrawUsageHead()}");
}
var anySubcommand = Subcommands.Any();
if (arguments.Any() || anySubcommand)
{
writer.Write(" [--]");
}
// draw arguments
foreach (var argument in arguments)
{
writer.Write($" {argument.GetDrawUsageHead()}");
}
if (anySubcommand)
{
writer.Write($" <subcommand> [sub-options] [sub-args]");
}
writer.IndentLevel = 0;
writer.WriteLine();
}
