class
Platform

Information about the environment in which the current program is running.

Platform provides information such as the operating system, the hostname of the computer, the value of environment variables, the path to the running program, and so on.

Get the URI to the current Dart script

Use the script getter to get the URI to the currently running Dart script.

import 'dart:io' show Platform;

void main() {
  // Get the URI of the script being run.
  var uri = Platform.script;
  // Convert the URI to a path.
  var path = uri.toFilePath();
}

Get the value of an environment variable

The environment getter returns a the names and values of environment variables in a Map that contains key-value pairs of strings. The Map is unmodifiable. This sample shows how to get the value of the PATH environment variable.

import 'dart:io' show Platform;

void main() {
  Map<String, String> envVars = Platform.environment;
  print(envVars['PATH']);
}

Determine the OS

You can get the name of the operating system as a string with the operatingSystem getter. You can also use one of the static boolean getters: isMacOS, isLinux, and isWindows.

import 'dart:io' show Platform, stdout;

void main() {
  // Get the operating system as a string.
  String os = Platform.operatingSystem;
  // Or, use a predicate getter.
  if (Platform.isMacOS) {
    Print('is a Mac');
  } else {
   print('is not a Mac');
  }
}

Other resources

Dart by Example provides additional task-oriented code samples that show how to use various API from the dart:io library.

Static Properties

bool isLinux
read-only
Returns true if the operating system is Linux.
bool isMacOS
read-only
Returns true if the operating system is OS X.
bool isWindows
read-only
Returns true if the operating system is Windows.
bool isAndroid
read-only
Returns true if the operating system is Android.
int numberOfProcessors
read-only
Get the number of processors of the machine.
String pathSeparator
read-only
Get the path separator used by the operating system to separate components in file paths.
String operatingSystem
read-only
Get a string (linux, macos, windows or android) representing the operating system.
String localHostname
read-only
Get the local hostname for the system.
Map<String,String> environment
read-only
Get the environment for this process.
String executable
read-only
Returns the path of the executable used to run the script in this isolate.
String resolvedExecutable
read-only
Returns the path of the executable used to run the script in this isolate after it has been resolved by the OS.
Uri script
read-only
Returns the absolute URI of the script being run in this isolate.
List<String> executableArguments
read-only
Returns the flags passed to the executable used to run the script in this isolate. These are the command-line flags between the executable name and the script name. Each fetch of executableArguments returns a new List, containing the flags passed to the executable.
String packageRoot
read-only
Returns the value of the --package-root flag passed to the executable used to run the script in this isolate. This is the directory in which Dart packages are looked up.
String version
read-only
Returns the version of the current Dart runtime.

Constructors

Platform()