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Presets

DCM includes 3 sets of predefined configurations:

  • All: contains all available lint rules for Dart and Flutter.
  • Dart: contains all lint rules applicable to any Dart app.
  • Flutter: contains all lint rules applicable to any Flutter app.
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While presets are a great way to keep track of rule list updates, upgrading to a newer version of DCM can introduce new issues if the preset has been updated.

Consider this before choosing a preset.

Enabling a Preset​

To enable a preset:

  1. Install dart_code_metrics_presets as a dev dependency:

    $ flutter pub add --dev dart_code_metrics_presets

  2. For DCM configuration add the extents entry:

    analysis_options.yaml
    dart_code_metrics:
      extends:
        - package:dart_code_metrics_presets/all.yaml

Reconfiguring a Rule​

To reconfigure a rule included into a preset:

analysis_options.yaml
dart_code_metrics:
  extends:
    - package:dart_code_metrics_presets/all.yaml
  rules:
    - arguments-ordering:
        child-last: true

Disabling a Rule​

To disable a rule set its configuration to : false:

analysis_options.yaml
dart_code_metrics:
  extends:
    - package:dart_code_metrics_presets/all.yaml
  rules:
    - avoid-banned-imports: false

Defining a Custom Preset​

Any other preset can be passed to the extends entry. To create a custom preset create a yaml file with the same structure as for regular DCM configuration.