attemptedCliUpdateVersion function

Version? attemptedCliUpdateVersion([ Map<String, String>? environment ])

The version a preceding process already attempted to install, if any.

Returns null when the variable is unset, empty, or not a valid version, which lets the update proceed.

Defaults to the environment of the current process.

Implementation

Version? attemptedCliUpdateVersion([final Map<String, String>? environment]) {
  final env = environment ?? Platform.environment;
  final value = env[cliUpdateAttemptedEnvName];
  if (value == null || value.isEmpty) {
    return null;
  }

  try {
    return Version.parse(value);
  } on FormatException {
    return null;
  }
}