description

# Directory class abstract interface

A reference to a directory (or folder) on the file system.

A Directory is an object holding a path on which operations can be performed. The path to the directory can be absolute or relative. It allows access to the parent directory, since it is a FileSystemEntity.

The Directory also provides static access to the system's temporary file directory, systemTemp, and the ability to access and change the current directory.

Create a new Directory to give access the directory with the specified path:

    var myDir = Directory('myDir');

Most instance methods of Directory exist in both synchronous and asynchronous variants, for example, create and createSync. Unless you have a specific reason for using the synchronous version of a method, prefer the asynchronous version to avoid blocking your program.

## Create a directory

The following code sample creates a directory using the create method. By setting the `recursive` parameter to true, you can create the named directory and all its necessary parent directories, if they do not already exist.

    import 'dart:io';

    void main() async {
      // Creates dir/ and dir/subdir/.
      var directory = await Directory('dir/subdir').create(recursive: true);
      print(directory.path);
    }

## List the entries of a directory

Use the list or listSync methods to get the files and directories contained in a directory. Set `recursive` to true to recursively list all subdirectories. Set `followLinks` to true to follow symbolic links. The list method returns a Stream of FileSystemEntity objects. Listen on the stream to access each object as it is found:

    import 'dart:io';

    void main() async {
      // Get the system temp directory.
      var systemTempDir = Directory.systemTemp;

      // List directory contents, recursing into sub-directories,
      // but not following symbolic links.
      await for (var entity in
          systemTempDir.list(recursive: true, followLinks: false)) {
        print(entity.path);
      }
    }

## The use of asynchronous methods

I/O operations can block a program for some period of time while it waits for the operation to complete. To avoid this, all methods involving I/O have an asynchronous variant which returns a Future. This future completes when the I/O operation finishes. While the I/O operation is in progress, the Dart program is not blocked, and can perform other operations.

For example, the exists method, which determines whether the directory exists, returns a boolean value asynchronously using a Future.

    import 'dart:io';

    void main() async {
      final myDir = Directory('dir');
      var isThere = await myDir.exists();
      print(isThere ? 'exists' : 'nonexistent');
    }

In addition to exists, the stat, rename, and other methods are also asynchronous.

## Other resources

- The Files and directories section of the library tour.

- Write Command-Line Apps, a tutorial about writing command-line apps, includes information about files and directories.

Implemented types
  - FileSystemEntity

## Constructors

Directory(String path)
  Creates a Directory object.
  factory
Directory.fromRawPath(Uint8List path)
  factory
Directory.fromUri(Uri uri)
  Create a Directory from a URI.
  factory

## Properties

absolute → Directory
  A Directory whose path is the absolute path of this Directory.
  no setteroverride
hashCode → int
  The hash code for this object.
  no setterinherited
isAbsolute → bool
  Whether this object's path is absolute.
  no setterinherited
parent → Directory
  The parent directory of this entity.
  no setterinherited
path → String
  Gets the path of this directory.
  no setteroverride
runtimeType → Type
  A representation of the runtime type of the object.
  no setterinherited
uri → Uri
  A Uri representing the directory's location.
  no setteroverride

## Methods

create({bool recursive = false}) → Future<Directory>
  Creates the directory if it doesn't exist.
createSync({bool recursive = false}) → void
  Synchronously creates the directory if it doesn't exist.
createTemp([String? prefix]) → Future<Directory>
  Creates a temporary directory in this directory.
createTempSync([String? prefix]) → Directory
  Synchronously creates a temporary directory in this directory.
delete({bool recursive = false}) → Future<FileSystemEntity>
  Deletes this Directory.
  override
deleteSync({bool recursive = false}) → void
  Synchronously deletes this Directory.
  override
exists() → Future<bool>
  Checks whether the file system entity with this path exists.
  inherited
existsSync() → bool
  Synchronously checks whether the file system entity with this path exists.
  inherited
list({bool recursive = false, bool followLinks = true}) → Stream<FileSystemEntity>
  Lists the sub-directories and files of this Directory.
listSync({bool recursive = false, bool followLinks = true}) → List<FileSystemEntity>
  Lists the sub-directories and files of this Directory. Optionally recurses into sub-directories.
noSuchMethod(Invocation invocation) → dynamic
  Invoked when a nonexistent method or property is accessed.
  inherited
rename(String newPath) → Future<Directory>
  Renames this directory.
  override
renameSync(String newPath) → Directory
  Synchronously renames this directory.
  override
resolveSymbolicLinks() → Future<String>
  Resolves the path of a file system object relative to the current working directory.
  override
resolveSymbolicLinksSync() → String
  Resolves the path of a file system object relative to the current working directory.
  override
stat() → Future<FileStat>
  Calls the operating system's `stat()` function on path.
  inherited
statSync() → FileStat
  Synchronously calls the operating system's `stat()` function on path.
  inherited
toString() → String
  Returns a human readable representation of this Directory.
  override
watch({int events = FileSystemEvent.all, bool recursive = false}) → Stream<FileSystemEvent>
  Start watching the FileSystemEntity for changes.
  inherited

## Operators

operator ==(Object other) → bool
  The equality operator.
  inherited

## Static Properties

current ↔ Directory
  Creates a directory object pointing to the current working directory.
  getter/setter pair
systemTemp → Directory
  The system temp directory.
  no setter