Analysis

Add dart_rules as dependency to your pubspec.yaml

dev_dependencies:
  dart_rules:
    git:
      url: https://github.com/fastogt/dart_rules.git
      ref: main

Add a analysis_options.yaml to the root of you project.

include: package:dart_rules/analysis_options.yaml

Hit save and see the dartanalyzer executing the lint checks in you favorite editor.

If a specific lint warning should be ignored, it can be flagged with a comment. For example,

   // ignore: avoid_as
   (pm as Person).firstName = 'Seth';

tells the Dart analyzer to ignore this instance of the avoid_as warning.

End-of-line comments are supported as well. The following communicates the same thing:

   (pm as Person).firstName = 'Seth'; // ignore: avoid_as

To ignore a rule for an entire file, use the ignore_for_file comment flag. For example,

// ignore_for_file: avoid_as

void main() {
  ...
  (pm as Person).firstName = 'Seth';
}

tells the Dart analyzer to ignore all occurrences of the avoid_as warning in this file.

Formatting

To format all files in project run flutter format . --line-length=100.

To format your code in the current source code window use the following:

Android Studio:

Cmd+Alt+L (on Mac) or Ctrl+Alt+L (on Windows and Linux).

VS Code:

Shift+Alt+F or right-click in the code window and select Format Document

Style

Set maximum line length to 100 symbols On both Android Studio and VS Code do

File -> Settings -> Input in search bar 'line length dart'

Android Studio:

VS Code: