private async ValueTask <int> RunAsync(ApplicationSchema applicationSchema, CommandInput commandInput)
{
// Handle debug directive
if (IsDebugModeEnabled(commandInput))
{
await PromptDebuggerAsync();
}
// Handle preview directive
if (IsPreviewModeEnabled(commandInput))
{
_console.Output.WriteCommandInput(commandInput);
return(0);
}
// Try to get the command schema that matches the input
var commandSchema =
applicationSchema.TryFindCommand(commandInput.CommandName) ??
applicationSchema.TryFindDefaultCommand() ??
FallbackDefaultCommand.Schema;
// Activate command instance
var commandInstance = commandSchema == FallbackDefaultCommand.Schema
? new FallbackDefaultCommand() // bypass activator
: (ICommand)_typeActivator.CreateInstance(commandSchema.Type);
// Assemble help context
var helpContext = new HelpContext(
Metadata,
applicationSchema,
commandSchema,
commandSchema.GetValues(commandInstance)
);
// Handle help option
if (ShouldShowHelpText(commandSchema, commandInput))
{
_console.Output.WriteHelpText(helpContext);
return(0);
}
// Handle version option
if (ShouldShowVersionText(commandSchema, commandInput))
{
_console.Output.WriteLine(Metadata.Version);
return(0);
}
// Starting from this point, we may produce exceptions that are meant for the
// end user of the application (i.e. invalid input, command exception, etc).
// Catch these exceptions here, print them to the console, and don't let them
// propagate further.
try
{
// Bind and execute command
_commandBinder.Bind(commandInput, commandSchema, commandInstance);
await commandInstance.ExecuteAsync(_console);
return(0);
}
catch (CliFxException ex)
{
_console.Error.WriteException(ex);
if (ex.ShowHelp)
{
_console.Output.WriteLine();
_console.Output.WriteHelpText(helpContext);
}
return(ex.ExitCode);
}
}