isGloballyActivated method
returns true if the given package has been globally activated
Implementation
bool isGloballyActivated(String packageName) {
const notFound = r'123!!23172@@#$!@!#';
/// run pub global list to see if dcli is run from a local path.
final line = DartSdk()
.runPub(args: ['global', 'list'], progress: Progress.capture())
.lines
.firstWhere((line) => line.startsWith(packageName),
orElse: () => notFound);
return line.contains(packageName);
}