blob: 53231de3bdacef8505fdc07ad34aaa9a382dfc29 [file] [log] [blame]
// Copyright 2014 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
import 'dart:io';
import 'package:meta/meta.dart';
abstract class Stdio {
/// Error/warning messages printed to STDERR.
void printError(String message);
/// Ordinary STDOUT messages.
void printStatus(String message);
/// Debug messages that are only printed in verbose mode.
void printTrace(String message);
/// Write string to STDOUT without trailing newline.
void write(String message);
/// Read a line of text from STDIN.
String readLineSync();
}
/// A logger that will print out trace messages.
class VerboseStdio extends Stdio {
VerboseStdio({
@required this.stdout,
@required this.stderr,
@required this.stdin,
}) : assert(stdout != null), assert(stderr != null), assert(stdin != null);
final Stdout stdout;
final Stdout stderr;
final Stdin stdin;
@override
void printError(String message) {
stderr.writeln(message);
}
@override
void printStatus(String message) {
stdout.writeln(message);
}
@override
void printTrace(String message) {
stdout.writeln(message);
}
@override
void write(String message) {
stdout.write(message);
}
@override
String readLineSync() {
return stdin.readLineSync();
}
}