proper_from_environment

Details

DO use const when invoking bool.fromEnvironment, int.fromEnvironment and String.fromEnvironment.

The constructors bool.fromEnvironment, int.fromEnvironment and String.fromEnvironment are only guaranteed to work when invoked as a const constructor.

see: dart-lang-issue

final boolean = bool.fromEnvironment('bool');
int integer = int.fromEnvironment('int');
var string = String.fromEnvironment('String');

const boolean = bool.fromEnvironment('bool');
const integer = int.fromEnvironment('int');
const string = String.fromEnvironment('String');

Usage

To enable the proper_from_environment rule, add proper_from_environment under custom_lint > rules in your analysis_options.yaml file:

custom_lint:
  rules:
    - proper_from_environment