Configuration

DCL is designed to be flexible and configurable for your use case. You can turn off every rule and run only with enabled metrics calculation or have both rules and metrics enabled.

To configure DCL, add a dart_code_linter entry to analysis_options.yaml:

dart_code_linter:
  extends:
    - ... # configures the list of preset configurations
  metrics:
    - ... # configures the list of reported metrics
  metrics-exclude:
    - ... # configures the list of files that should be ignored by metrics
  rules:
    - ... # configures the list of rules
  rules-exclude:
    - ... # configures the list of files that should be ignored by rules
  anti-patterns:
    - ... # configures the list of anti-patterns

This configuration is used by both CLI and the analysis server.

Basic config example:

dart_code_linter:
  rules:
    - avoid-dynamic
    - avoid-passing-async-when-sync-expected
    - avoid-redundant-async
    - avoid-unnecessary-type-assertions
    - avoid-unnecessary-type-casts
    - avoid-unrelated-type-assertions
    - avoid-unused-parameters
    - avoid-nested-conditional-expressions
    - newline-before-return
    - no-boolean-literal-compare
    - no-empty-block
    - prefer-trailing-comma
    - prefer-conditional-expressions
    - no-equal-then-else
    - prefer-moving-to-variable
    - prefer-match-file-name
    - avoid-collapsible-if
    - avoid-redundant-else
    - avoid-incomplete-copy-with
    - avoid-self-compare
    - avoid-self-assignment
    - avoid-unnecessary-nullable-return-type
    - avoid-unrelated-type-casts
    - prefer-declaring-const-constructor

You can find a list of recommended rules here.

Basic config with metrics:

dart_code_linter:
  metrics:
    cyclomatic-complexity: 20
    number-of-parameters: 4
    maximum-nesting-level: 5
  metrics-exclude:
    - test/**
  rules:
    - avoid-dynamic
    - avoid-passing-async-when-sync-expected
    - avoid-redundant-async
    - avoid-unnecessary-type-assertions
    - avoid-unnecessary-type-casts
    - avoid-unrelated-type-assertions
    - avoid-unused-parameters
    - avoid-nested-conditional-expressions
    - newline-before-return
    - no-boolean-literal-compare
    - no-empty-block
    - prefer-trailing-comma
    - prefer-conditional-expressions
    - no-equal-then-else
    - prefer-moving-to-variable
    - prefer-match-file-name
    - avoid-collapsible-if
    - avoid-redundant-else
    - avoid-incomplete-copy-with
    - avoid-self-compare
    - avoid-self-assignment
    - avoid-unnecessary-nullable-return-type
    - avoid-unrelated-type-casts
    - prefer-declaring-const-constructor

You can find a list of recommended metrics here.