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flutter / third_party / io / 3f11180e571691955abfadcc77c318385ae7ee75
commit3f11180e571691955abfadcc77c318385ae7ee75[log] [tgz]
authorKevin Moore <kevmoo@users.noreply.github.com>Tue Aug 01 08:15:50 2017 -0700
committerMatan Lurey <matanlurey@users.noreply.github.com>Tue Aug 01 08:15:50 2017 -0700
tree6b750885e1b762f17f4c0741dc10a205a9b88c4a
parent2edda5bdfaf1592cc7af85aba055a692042e85cc [diff]
Rename exit_code file to match class name (#11)
2 files changed
tree: 6b750885e1b762f17f4c0741dc10a205a9b88c4a
  1. example/
  2. lib/
  3. test/
  4. .gitignore
  5. .travis.yml
  6. analysis_options.yaml
  7. AUTHORS
  8. CHANGELOG.md
  9. LICENSE
  10. pubspec.yaml
  11. README.md
README.md

io

Contains utilities for the Dart VM's dart:io.

Build Status

Usage

Files

isExecutable

Returns whether a provided file path is considered executable on the host operating system.

Processes

ExitCode

An enum-type class that contains known exit codes.

ProcessManager

A higher-level service for spawning and communicating with processes.

Use spawn to create a process with std[in|out|err] forwarded by default
/// Runs `dartfmt` commands and `pub publish`.
Future<Null> main() async {
  final manager = new ProcessManager();
  
  // Runs dartfmt --version and outputs the result via stdout.
  print('Running dartfmt --version');
  var spawn = await manager.spawn('dartfmt', arguments: ['--version']);
  await spawn.exitCode;
  
  // Runs dartfmt -n . and outputs the result via stdout.
  print('Running dartfmt -n .');
  spawn = await manager.spawn('dartfmt', arguments: ['-n', '.']);
  await spawn.exitCode;
  
  // Runs pub publish. Upon hitting a blocking stdin state, you may directly
  // output to the processes's stdin via your own, similar to how a bash or
  // shell script would spawn a process.
  print('Running pub publish');
  spawn = await manager.spawn('pub', arguments: ['publish']);
  await spawn.exitCode;
  
  // Closes stdin for the entire program.
  await sharedStdIn.terminate();
}

sharedStdIn

A safer version of the default stdin stream from dart:io that allows a subscriber to cancel their subscription, and then allows a new subscriber to start listening. This differs from the default behavior where only a single listener is ever allowed in the application lifecycle:

test('should allow multiple subscribers', () async {
  final logs = <String>[];
  final asUtf8 = sharedStdIn.transform(UTF8.decoder);
  // Wait for input for the user.
  logs.add(await asUtf8.first);
  // Wait for more input for the user.
  logs.add(await asUtf8.first);
  expect(logs, ['Hello World', 'Goodbye World']);
});

For testing, an instance of SharedStdIn may be created directly.