private int?HandleVersionOption(CommandInput commandInput)
{
// Version should be rendered if it was requested on a default command
var shouldRenderVersion = !commandInput.HasArguments() && commandInput.IsVersionOptionSpecified();
// If shouldn't render version, pass execution to the next handler
if (!shouldRenderVersion)
{
return(null);
}
// Render version text
_console.Output.WriteLine(_metadata.VersionText);
// Short-circuit with exit code 0
return(0);
}
private int?HandleHelpOption(CommandInput commandInput,
IReadOnlyList <CommandSchema> availableCommandSchemas, CommandCandidate?commandCandidate)
{
// Help should be rendered if it was requested, or when executing a command which isn't defined
var shouldRenderHelp = commandInput.IsHelpOptionSpecified() || commandCandidate == null;
// If shouldn't render help, pass execution to the next handler
if (!shouldRenderHelp)
{
return(null);
}
// Keep track whether there was an error in the input
var isError = false;
// Report error if no command matched the arguments
if (commandCandidate is null)
{
// If a command was specified, inform the user that the command is not defined
if (commandInput.HasArguments())
{
_console.WithForegroundColor(ConsoleColor.Red,
() => _console.Error.WriteLine($"No command could be matched for input [{string.Join(" ", commandInput.Arguments)}]"));
isError = true;
}
commandCandidate = new CommandCandidate(CommandSchema.StubDefaultCommand, new string[0], commandInput);
}
// Build help text source
var helpTextSource = new HelpTextSource(_metadata, availableCommandSchemas, commandCandidate.Schema);
// Render help text
_helpTextRenderer.RenderHelpText(_console, helpTextSource);
// Short-circuit with appropriate exit code
return(isError ? -1 : 0);
}