binDirectory function

Directory binDirectory({ String? PATH, })

Returns the path to the system's binary folder.

On non-Windows systems, it searches the directories listed in the PATH environment variable for /usr/bin and /usr/local/bin and returns the path to the first one found. If neither is found, it returns the path to the first directory in PATH that exists.

On Windows systems, it checks if the ProgramFiles folder exists and returns its path. If it does not exist, it returns the path to the System32 folder.

Throws an exception if no binary folder was found.

Implementation

// ignore: non_constant_identifier_names
Directory binDirectory({String? PATH}) {
  if (!Platform.isWindows) {
    {
      final String path = PATH ?? Platform.environment['PATH'] ?? '';
      List<String> paths = path.split(':');

      Directory dirLocalBin = Directory('/usr/local/bin');
      Directory dirBin = Directory('/usr/bin');
      if (paths.contains('/usr/local/bin') && dirLocalBin.existsSync()) {
        return dirLocalBin;
      } else if (paths.contains('/usr/bin') && dirBin.existsSync()) {
        return dirBin;
      } else {
        for (String p in paths) {
          Directory dir = Directory(p);
          if (dir.existsSync()) {
            return dir;
          }
        }
      }
    }
  } else {
    // Windows
    String? binDir = Platform.environment['ProgramFiles'];

    if (binDir != null) {
      Directory winBin = Directory(binDir);
      if (winBin.existsSync()) {
        return winBin;
      }
    } else {
      binDir = r'C:\Windows\System32';
      Directory winBin = Directory(binDir);
      if (winBin.existsSync()) {
        return winBin;
      }
    }
  }
  throw Exception('No executable folder was found in the PATH environment variable.');
}