pubGetOrUpgrade function
Implementation
Future<void> pubGetOrUpgrade(DependNode node) async {
var run = command == 'upgrade' ? command : 'get';
var path = node.path.replaceFirst(RegExp('/'), '');
var args = ['pub', '$run', if (path.isNotEmpty) path];
var res = await Process.run('flutter', args,
workingDirectory: Directory.current.path, runInShell: true);
if (null != res.stdout) print(res.stdout);
if (null != res.stderr) print(res.stderr);
}