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80e88cb303
Empty-args usage now lists nested command groups alongside root verbs. Nested `abs upload --help` brands the public command path instead of the internal parser verb. Co-authored-by: rmcrackan <rmcrackan@gmail.com>
83 lines
2.3 KiB
C#
83 lines
2.3 KiB
C#
using AppScaffolding;
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using CommandLine;
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using CommandLine.Text;
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using LibationFileManager;
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using System;
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using System.Collections.Generic;
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using System.IO;
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namespace LibationCli;
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[Verb("help", HelpText = "Display more information on a specific command.")]
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internal class HelpVerb
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{
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/// <summary>
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/// Name of the verb to get help about
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/// </summary>
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[Value(0, Default = "")]
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public string? HelpType { get; set; }
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/// <summary>
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/// Create a base <see cref="HelpText"/> for <see cref="LibationCli"/>
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/// </summary>
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public static HelpText CreateHelpText() => new HelpText
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{
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AutoVersion = false,
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AutoHelp = false,
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Heading = $"LibationCli v{LibationScaffolding.BuildVersion.ToVersionString()}",
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AdditionalNewLineAfterOption = true,
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MaximumDisplayWidth = 80
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};
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public static HelpText GetGroupHelpText(CliCommandGroup group)
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{
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var helpText = CreateHelpText();
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helpText.AddPreOptionsLine(group.HelpText);
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helpText.AddPreOptionsLine($"{group.Name} commands:");
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foreach (var subcommand in group.Subcommands)
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helpText.AddPreOptionsLine($" {group.Name} {subcommand.Name} {subcommand.HelpText}");
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return helpText;
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}
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/// <summary>
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/// Write the global verb list plus nested command groups (e.g. <c>abs</c>).
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/// Groups are appended after <see cref="HelpText"/> because CommandLineParser has no post-options slot.
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/// </summary>
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public static void WriteGlobalVerbList(
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TextWriter error,
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Type[] verbTypes,
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IReadOnlyList<CliCommandGroup> groups,
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string? preOptionsLine = null)
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{
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var helpText = CreateHelpText();
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if (preOptionsLine is not null)
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helpText.AddPreOptionsLine(preOptionsLine);
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helpText.AddVerbs(verbTypes);
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error.WriteLine(helpText);
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foreach (var group in groups)
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error.WriteLine($" {group.Name,-21}{group.HelpText}");
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}
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/// <summary>
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/// Get the <see cref="HelpType"/>'s <see cref="HelpText"/>
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/// </summary>
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public HelpText GetHelpText()
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{
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var helpText = CreateHelpText();
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var result = new Parser().ParseArguments([HelpType], Program.VerbTypes);
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if (result.TypeInfo.Current == typeof(NullInstance))
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{
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//HelpType is not a defined verb so get LibationCli usage
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helpText.AddVerbs(Program.VerbTypes);
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}
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else
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{
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helpText.AutoHelp = true;
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helpText.AddDashesToOption = true;
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helpText.AddOptions(result);
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}
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return helpText;
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}
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}
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