public GraphController()
{
var query = new RootQuery();
Schema = new RootSchema(query);
Executor = new DocumentExecuter();
}
private int?Execute(CliContext context)
{
RootSchema root = context.RootSchema;
CommandInput input = context.Input;
// Try to get the command matching the input or fallback to default
CommandSchema commandSchema = root.TryFindCommand(input.CommandName) ?? StubDefaultCommand.Schema;
// TODO: is the problem below still valid?
// TODO: is it poossible to overcome this (related to [!]) limitation of new mode system
// Forbid to execute real default command in interactive mode without [!] directive.
//if (!(commandSchema.IsHelpOptionAvailable && input.IsHelpOptionSpecified) &&
// _applicationLifetime.CurrentModeType == typeof(InteractiveMode) &&
// commandSchema.IsDefault && !hasDefaultDirective)
//{
// commandSchema = StubDefaultCommand.Schema;
//}
// Update CommandSchema
context.CommandSchema = commandSchema;
// Get command instance (default values are used in help so we need command instance)
ICommand instance = GetCommandInstance(commandSchema);
context.Command = instance;
// To avoid instantiating the command twice, we need to get default values
// before the arguments are bound to the properties
IReadOnlyDictionary <ArgumentSchema, object?> defaultValues = commandSchema.GetArgumentValues(instance);
context.CommandDefaultValues = defaultValues;
return(null);
}
/// <inheritdoc/>
public void Write(CommandSchema command,
IReadOnlyDictionary <ArgumentSchema, object?> defaultValues)
{
RootSchema root = _context.RootSchema;
IEnumerable <CommandSchema> childCommands = root.GetChildCommands(command.Name)
.OrderBy(x => x.Name);
_console.ResetColor();
_console.ForegroundColor = ConsoleColor.Gray;
if (command.IsDefault)
{
WriteApplicationInfo();
}
WriteCommandDescription(command);
WriteCommandUsage(root.Directives, command, childCommands);
WriteCommandParameters(command);
WriteCommandOptions(command, defaultValues);
WriteModeRestrictionsManual(command);
WriteCommandChildren(command, childCommands);
WriteDirectivesManual(root.Directives);
WriteCommandManual(command);
WriteLine();
}
/// <summary>
/// Parses input before pipeline execution.
/// </summary>
protected virtual async Task <int> ParseInput(IReadOnlyList <string> commandLineArguments,
RootSchema root)
{
//TODO: CommandInput.Parse as middleware step
CommandInput input = CommandInputResolver.Parse(commandLineArguments, root.GetCommandNames());
CliContext.Input = input;
return(await ExecuteCommand());
}
public static RootSchema GetSchema()
{
RootSchema schema = new RootSchema().InitProperties();
schema.AdditionalProperties = false;
foreach (var extension in ExtensionInfo.Extensions)
{
schema.Properties.Add(extension.Name, new RootSchema()
{
Type = SchemaObjectType.Boolean,
Default = false,
Description = "The '" + extension.Name + "' extension costs " + extension.Cost + " extension points."
});
}
return(schema);
}
private int?Execute(CliContext context)
{
RootSchema root = context.RootSchema;
CommandInput input = context.Input;
// Try to get the command matching the input or fallback to default
bool hasDefaultDirective = input.HasDirective(BuiltInDirectives.Default);
CommandSchema command = root.TryFindCommand(input.CommandName, hasDefaultDirective) ?? StubDefaultCommand.Schema;
// Forbid to execute real default command in interactive mode without [!] directive.
if (!(command.IsHelpOptionAvailable && input.IsHelpOptionSpecified) &&
context.IsInteractiveMode && command.IsDefault && !hasDefaultDirective)
{
command = StubDefaultCommand.Schema;
}
// Update CommandSchema
context.CommandSchema = command;
return(null);
}
private async Task RunInteractivelyAsync(RootSchema root)
{
IConsole console = CliContext.Console;
string executableName = CliContext.Metadata.ExecutableName;
do
{
string[]? commandLineArguments = GetInput(console, executableName);
if (commandLineArguments is null)
{
console.ResetColor();
return;
}
CommandInput input = CommandInputResolver.Parse(commandLineArguments, root.GetCommandNames());
CliContext.Input = input; //TODO maybe refactor with some clever IDisposable class
await ExecuteCommand();
console.ResetColor();
}while (!console.GetCancellationToken().IsCancellationRequested);
}
protected override async Task <int> ParseInput(IReadOnlyList <string> commandLineArguments,
RootSchema root)
{
CommandInput input = CommandInputResolver.Parse(commandLineArguments, root.GetCommandNames());
CliContext.Input = input;
if (input.IsInteractiveDirectiveSpecified)
{
CliContext.IsInteractiveMode = true;
// we don't want to run default command for e.g. `[interactive]` but we want to run if there is sth else
if (!input.IsDefaultCommandOrEmpty)
{
await ExecuteCommand();
}
await RunInteractivelyAsync(root);
return(ExitCodes.Success); // called after Ctrl+C
}
return(await ExecuteCommand());
}
/// <summary>
/// Runs the application with specified command line arguments and environment variables, and returns the exit code.
/// </summary>
/// <remarks>
/// If a <see cref="CommandException"/> is thrown during command execution, it will be handled and routed to the console.
/// Additionally, if the debugger is not attached (i.e. the app is running in production), all other exceptions thrown within
/// this method will be handled and routed to the console as well.
/// </remarks>
public async ValueTask <int> RunAsync(
IReadOnlyList <string> commandLineArguments,
IReadOnlyDictionary <string, string> environmentVariables)
{
try
{
var root = RootSchema.Resolve(_configuration.CommandTypes);
var input = CommandInput.Parse(commandLineArguments, root.GetCommandNames());
// Debug mode
if (_configuration.IsDebugModeAllowed && input.IsDebugDirectiveSpecified)
{
await LaunchAndWaitForDebuggerAsync();
}
// Preview mode
if (_configuration.IsPreviewModeAllowed && input.IsPreviewDirectiveSpecified)
{
WriteCommandLineInput(input);
return(ExitCode.Success);
}
// Try to get the command matching the input or fallback to default
var command =
root.TryFindCommand(input.CommandName) ??
root.TryFindDefaultCommand() ??
StubDefaultCommand.Schema;
// Version option
if (command.IsVersionOptionAvailable && input.IsVersionOptionSpecified)
{
_console.Output.WriteLine(_metadata.VersionText);
return(ExitCode.Success);
}
// Get command instance (also used in help text)
var instance = GetCommandInstance(command);
// To avoid instantiating the command twice, we need to get default values
// before the arguments are bound to the properties
var defaultValues = command.GetArgumentValues(instance);
// Help option
if (command.IsHelpOptionAvailable && input.IsHelpOptionSpecified ||
command == StubDefaultCommand.Schema && !input.Parameters.Any() && !input.Options.Any())
{
_helpTextWriter.Write(root, command, defaultValues);
return(ExitCode.Success);
}
// Bind arguments
try
{
command.Bind(instance, input, environmentVariables);
}
// This may throw exceptions which are useful only to the end-user
catch (CliFxException ex)
{
WriteError(ex.ToString());
_helpTextWriter.Write(root, command, defaultValues);
return(ExitCode.FromException(ex));
}
// Execute the command
try
{
await instance.ExecuteAsync(_console);
return(ExitCode.Success);
}
// Swallow command exceptions and route them to the console
catch (CommandException ex)
{
WriteError(ex.ToString());
if (ex.ShowHelp)
{
_helpTextWriter.Write(root, command, defaultValues);
}
return(ex.ExitCode);
}
}
// To prevent the app from showing the annoying Windows troubleshooting dialog,
// we handle all exceptions and route them to the console nicely.
// However, we don't want to swallow unhandled exceptions when the debugger is attached,
// because we still want the IDE to show them to the developer.
catch (Exception ex) when(!Debugger.IsAttached)
{
WriteError(ex.ToString());
return(ExitCode.FromException(ex));
}
}
public async ValueTask <int> RunAsync(IEnumerable <string> commandLineArguments,
IReadOnlyDictionary <string, string> environmentVariables)
{
try
{
_logger.LogInformation("Starting CLI application...");
_console.ResetColor();
_environmentVariablesAccessor.EnvironmentVariables = environmentVariables;
RootSchema rootSchema = _rootSchemaAccessor.RootSchema; //Force root schema to resolve. TODO: find a solution to enable lazy root schema resolving.
//TODO: OnStart()
_startupMessage?.Invoke(_metadata, _console);
int exitCode = await StartAppAsync(commandLineArguments);
//TODO: OnStop()
_logger.LogInformation("CLI application stopped.");
return(exitCode);
}
// This may throw pre-execution resolving exceptions which are useful only to the end-user
catch (TypinException ex)
{
_logger.LogDebug(ex, $"{nameof(TypinException)} occured. Trying to find exception handler.");
IEnumerable <ICliExceptionHandler> exceptionHandlers = _serviceProvider.GetServices <ICliExceptionHandler>();
foreach (ICliExceptionHandler handler in exceptionHandlers)
{
if (handler.HandleException(ex))
{
_logger.LogDebug(ex, "Exception handled by {ExceptionHandlerType}.", handler.GetType().FullName);
break;
}
}
_logger.LogCritical(ex, "Unhandled Typin exception caused app to terminate.");
_console.Error.WithForegroundColor(ConsoleColor.DarkRed, (error) => error.WriteLine($"Unhandled Typin exception caused app to terminate."));
_console.Error.WriteLine();
_console.Error.WriteException(ex);
return(ExitCodes.FromException(ex));
}
// To prevent the app from showing the annoying Windows troubleshooting dialog,
// we handle all exceptions and route them to the console nicely.
// However, we don't want to swallow unhandled exceptions when the debugger is attached,
// because we still want the IDE to show them to the developer.
catch (Exception ex) //when (!Debugger.IsAttached)
{
_logger.LogCritical(ex, "Unhandled exception caused app to terminate.");
_console.Error.WithForegroundColor(ConsoleColor.DarkRed, (error) => error.WriteLine($"Fatal error occured in {_metadata.ExecutableName}."));
_console.Error.WriteLine();
_console.Error.WriteException(ex);
return(ExitCodes.FromException(ex));
}
}
public RootSchemaTests()
{
var serviceProvider = Mock.Of <IServiceProvider>();
_rootSchema = new RootSchema(serviceProvider);
}
