file 4.0.1

  • Installing
  • Versions
  • 48

Build Status

File #

A generic file system abstraction for Dart.

Like dart:io, package:file supplies a rich Dart-idiomatic API for accessing a file system.

Unlike dart:io, package:file:

  • Can be used to implement custom file systems.
  • Comes with an in-memory implementation out-of-the-box, making it super-easy to test code that works with the file system.
  • Allows using multiple file systems simultaneously. A file system is a first-class object. Instantiate however many you want and use them all.

Usage #

Implement your own custom file system:

import 'package:file/file.dart';

class FooBarFileSystem implements FileSystem { ... }

Use the in-memory file system:

import 'package:file/memory.dart';

var fs = new MemoryFileSystem();

Use the local file system (requires dart:io access):

import 'package:file/local.dart';

var fs = const LocalFileSystem();

4.0.1 #

4.0.0 #

  • Change method signature for RecordingRandomAccessFile._close to return a Future<void> instead of Future<RandomAccessFile>. This follows a change in dart:io, Dart SDK 2.0.0-dev.40.

3.0.0 #

  • Import dart:io unconditionally. More recent Dart SDK revisions allow dart:io to be imported in a browser context, though if methods are actually invoked, they will fail. This matches well with package:file, where users can use the memory library and get in-memory implementations of the dart:io interfaces.
  • Bump minimum Dart SDK to 1.24.0

2.3.7 #

  • Fix Dart 2 error.

2.3.6 #

  • Relax sdk upper bound constraint to '<2.0.0' to allow 'edge' dart sdk use.

2.3.5 #

  • Fix internal use of a cast which fails on Dart 2.0 .

2.3.4 #

  • Bumped maximum Dart SDK version to 2.0.0-dev.infinity

2.3.3 #

  • Relaxes version requirements on package:intl

2.3.2 #

  • Fixed, FileSystem.file(Uri), and to consult the file system's path context when converting the URI to a file path rather than using Uri.toFilePath().

2.3.1 #

  • Fixed MemoryFileSystem to make File.writeAs...() update the last modified time of the file.

2.3.0 #

  • Added the following convenience methods in Directory:
    • Directory.childDirectory(String basename)
    • Directory.childFile(String basename)
    • Directory.childLink(String basename)

2.2.0 #

  • Added ErrorCodes class, which holds errno values.

2.1.0 #

  • Add support for new dart:io API methods added in Dart SDK 1.23

2.0.1 #

  • Minor doc updates

2.0.0 #

  • Improved toString implementations in file system entity classes
  • Added ForwardingFileSystem and associated forwarding classes to the main file library
  • Removed FileSystem.pathSeparator, and added a more comprehensive FileSystem.path property
  • Added FileSystemEntity.basename and FileSystemEntity.dirname
  • Added the record_replay library
  • Added the testing library

1.0.1 #

  • Added FileSystem.systemTempDirectory
  • Added the ability to pass Uri and FileSystemEntity types to, FileSystem.file(), and
  • Added FileSystem.pathSeparator

1.0.0 #

  • Unified interface to match dart:io API
  • Local file system implementation
  • In-memory file system implementation
  • Chroot file system implementation

0.1.0 #

  • Initial version

Use this package as a library

1. Depend on it

Add this to your package's pubspec.yaml file:

  file: ^4.0.1

2. Install it

You can install packages from the command line:

with pub:

$ pub get

Alternatively, your editor might support pub get. Check the docs for your editor to learn more.

3. Import it

Now in your Dart code, you can use:

import 'package:file/file.dart';
Version Uploaded Documentation Archive
5.0.8+1 Jun 25, 2019 Go to the documentation of file 5.0.8+1 Download file 5.0.8+1 archive
5.0.8 May 20, 2019 Go to the documentation of file 5.0.8 Download file 5.0.8 archive
5.0.7 Dec 7, 2018 Go to the documentation of file 5.0.7 Download file 5.0.7 archive
5.0.6 Aug 30, 2018 Go to the documentation of file 5.0.6 Download file 5.0.6 archive
5.0.5 Aug 29, 2018 Go to the documentation of file 5.0.5 Download file 5.0.5 archive
5.0.4 Aug 14, 2018 Go to the documentation of file 5.0.4 Download file 5.0.4 archive
5.0.3 Aug 13, 2018 Go to the documentation of file 5.0.3 Download file 5.0.3 archive
5.0.2 Aug 13, 2018 Go to the documentation of file 5.0.2 Download file 5.0.2 archive
5.0.1 May 21, 2018 Go to the documentation of file 5.0.1 Download file 5.0.1 archive
5.0.0 Apr 10, 2018 Go to the documentation of file 5.0.0 Download file 5.0.0 archive

All 29 versions...

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The package version is not analyzed, because it does not support Dart 2. Until this is resolved, the package will receive a health and maintenance score of 0.

Analysis issues and suggestions

Support Dart 2 in pubspec.yaml.

The SDK constraint in pubspec.yaml doesn't allow the Dart 2.0.0 release. For information about upgrading it to be Dart 2 compatible, please see

Maintenance issues and suggestions

Make sure dartdoc successfully runs on your package's source files. (-10 points)

Dependencies were not resolved.


Package Constraint Resolved Available
Direct dependencies
Dart SDK >=2.0.0-dev.28.0 <2.0.0