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9662d49e12
1) Moved basic utility code into base/ directory to make it clear which code doesn't depend on Flutter-specific knowldge. 2) Move the CommandRunner subclasses into a runner/ directory because these aren't commands themselves.
105 lines
3.5 KiB
Dart
105 lines
3.5 KiB
Dart
// Copyright 2015 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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import 'dart:async';
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import 'dart:convert';
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import 'dart:io';
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import 'logging.dart';
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/// This runs the command and streams stdout/stderr from the child process to
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/// this process' stdout/stderr.
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Future<int> runCommandAndStreamOutput(List<String> cmd, {
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String prefix: '',
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RegExp filter,
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String workingDirectory
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}) async {
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logging.info(cmd.join(' '));
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Process process = await Process.start(
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cmd[0],
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cmd.sublist(1),
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workingDirectory: workingDirectory
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);
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process.stdout.transform(UTF8.decoder).listen((String data) {
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List<String> dataLines = data.trimRight().split('\n');
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if (filter != null) {
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// TODO(ianh): This doesn't handle IO buffering (where the data might be split half-way through a line)
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dataLines = dataLines.where((String s) => filter.hasMatch(s)).toList();
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}
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if (dataLines.length > 0) {
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stdout.write('$prefix${dataLines.join('\n$prefix')}\n');
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}
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});
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process.stderr.transform(UTF8.decoder).listen((String data) {
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List<String> dataLines = data.trimRight().split('\n');
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if (filter != null) {
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// TODO(ianh): This doesn't handle IO buffering (where the data might be split half-way through a line)
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dataLines = dataLines.where((String s) => filter.hasMatch(s));
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}
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if (dataLines.length > 0) {
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stderr.write('$prefix${dataLines.join('\n$prefix')}\n');
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}
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});
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return await process.exitCode;
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}
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Future runAndKill(List<String> cmd, Duration timeout) {
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Future<Process> proc = runDetached(cmd);
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return new Future.delayed(timeout, () async {
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logging.info('Intentionally killing ${cmd[0]}');
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Process.killPid((await proc).pid);
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});
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}
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Future<Process> runDetached(List<String> cmd) {
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logging.info(cmd.join(' '));
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Future<Process> proc = Process.start(
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cmd[0], cmd.getRange(1, cmd.length).toList(),
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mode: ProcessStartMode.DETACHED);
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return proc;
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}
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/// Run cmd and return stdout.
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/// Throws an error if cmd exits with a non-zero value.
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String runCheckedSync(List<String> cmd, { String workingDirectory }) =>
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_runWithLoggingSync(cmd, workingDirectory: workingDirectory, checked: true);
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/// Run cmd and return stdout.
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String runSync(List<String> cmd, { String workingDirectory }) =>
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_runWithLoggingSync(cmd, workingDirectory: workingDirectory);
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/// Return the platform specific name for the given Dart SDK binary. So, `pub`
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/// ==> `pub.bat`.
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String sdkBinaryName(String name) {
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return Platform.isWindows ? '$name.bat' : name;
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}
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String _runWithLoggingSync(List<String> cmd, {
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bool checked: false,
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String workingDirectory
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}) {
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logging.info(cmd.join(' '));
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ProcessResult results =
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Process.runSync(cmd[0], cmd.getRange(1, cmd.length).toList(), workingDirectory: workingDirectory);
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if (results.exitCode != 0) {
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String errorDescription = 'Error code ${results.exitCode} '
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'returned when attempting to run command: ${cmd.join(' ')}';
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logging.info(errorDescription);
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if (results.stderr.length > 0)
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logging.info('Errors logged: ${results.stderr.trim()}');
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if (checked)
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throw errorDescription;
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}
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if (results.stdout.trim().isNotEmpty)
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logging.fine(results.stdout.trim());
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return results.stdout;
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}
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class ProcessExit implements Exception {
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final int exitCode;
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ProcessExit(this.exitCode);
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String get message => 'ProcessExit: $exitCode';
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String toString() => message;
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}
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