fromPlatform static method

Future<PackageInfo> fromPlatform({ String? baseUrl, })

Retrieves package information from the platform. The result is cached.

The baseUrl parameter is for web use only and the other platforms will ignore it.

Web platform

In a web environment, the package uses the version.json file that it is generated in the build process.

The package will try to locate this file in 3 ways:

• If you provide the optional custom baseUrl parameter, it will be used as the first option where to search. Example:

  await PackageInfo.fromPlatform(baseUrl: 'https://cdn.domain.com/with/some/path/');
  

  With this, the package will try to search the file in https://cdn.domain.com/with/some/path/version.json

• The second option where it will search is the assetBase parameter that you can pass to the Flutter Web Engine when you initialize it.

  _flutter.loader.loadEntrypoint({
      onEntrypointLoaded: async function(engineInitializer) {
        let appRunner = await engineInitializer.initializeEngine({
          assetBase: "https://cdn.domain.com/with/some/path/"
        });
        appRunner.runApp();
      }
  });
  

  For more information about the Flutter Web Engine initialization see here: https://docs.flutter.dev/platform-integration/web/initialization#initializing-the-engine

• Finally, if none of the previous locations return the version.json file, the package will use the browser window base URL to resolve its location.

Implementation

static Future<PackageInfo> fromPlatform({String? baseUrl}) async {
  if (_fromPlatform != null) {
    return _fromPlatform!;
  }

  final platformData = await PackageInfoPlatform.instance.getAll(
    baseUrl: baseUrl,
  );

  _fromPlatform = PackageInfo(
    appName: platformData.appName,
    packageName: platformData.packageName,
    version: platformData.version,
    buildNumber: platformData.buildNumber,
    buildSignature: platformData.buildSignature,
    installerStore: platformData.installerStore,
  );
  return _fromPlatform!;
}