architecture_linter

Package architecture_linter helps you to keep your project right order. You can specify many rules (described below) that will be checked for suggestions and displayed in form of useful lints in your favorite IDE.

Installation

$ dart pub add --dev architecture_linter

# or for a Flutter package
$ flutter pub add --dev architecture_linter

OR

add it manually to pubspec.yaml

dev_dependencies:
  architecture_linter: ^0.2.2

and then run

$ dart pub get

# or for a Flutter package
$ flutter pub get

Add plugin to analyzer

Add this fragment to analysis_option.yaml so analyzer can use plugin:

analyzer:
  plugins:
    - architecture_linter

Basic configuration

Add configuration to analysis_options.yaml file. You can start with predefined one:

architecture_linter:
  excludes:
    - "**.g.dart"

  lint_severity: warning

  layers:
    - &infrastructureLayer
      name: "Infrastructure"
      path: "(infrastructure)"
    - &domainLayer
      name: "Domain"
      path: "(domain)"
    - &presentationLayer
      name: "Presentation"
      path: "(presentation)"
    - &useCaseLayer
      name: "Domain/UseCases"
      path: "(domain/use_cases)"
    - &utils
      name: "Utils"
      path: "(utils)"
    - &repository
      name: "repository"
      path: "(repository)"

  layers_config:
    - layer: *repository
      severity: error

  banned_imports:
    - layer: *domainLayer
      banned:
        - *presentationLayer
        - *useCaseLayer
        - *infrastructureLayer
    - layer: *presentationLayer
      banned:
        - *infrastructureLayer
    - layer: *infrastructureLayer
      banned:
        - *useCaseLayer
        - *presentationLayer
    - layer: *useCaseLayer
      banned:
        - *presentationLayer
        - *infrastructureLayer

Configuring lint severity:

To change lint severity for whole plugin add lint_severity entry in analysis_options.yaml under architecture_linter with one of three values:

• info
• warning
• error

For example:

lint_severity: error

You can also configure severity for lower level layer which is under already defined banned layer

For example:

  lint_severity: warning

  layers:
    - &domainLayer
      name: "Domain"
      path: "(domain)"
    - &presentationLayer
      name: "Presentation"
      path: "(presentation)"
    - &repository
      name: "repository"
      path: "(repository)"
    - &useCaseLayer
      name: "Domain/UseCases"
      path: "(domain/use_cases)"

  layers_config:
    - layer: *repository
      severity: error
    - layer: *infrastructureLayer
      severity: error
  
  banned_imports:
    - layer: *presentationLayer
      banned:
        - *domainLayer
    - layer: *useCaseLayer
      # You can also ban same origin layers
      banned:
        - *domainLayer
    - layer: *infrastructureLayer
      # You can also specify severity per layer
      severity: info
      banned:
        - *domainLayer

With this configuration, if repository under domain folder has been imported to presentationLayer the lint would be displayed as error.

An import of any file from domain to infrastructureLayer will result in lint alert of severity info despite of layers_config setting.

CLI:

Package also supports CLI, run it with:

$ dart run architecture_linter:analyzer analyze lib 

# or for a Flutter package
$ flutter pub run architecture_linter:analyzer analyze lib

You can also configure severity for which analyzer will have exit code 2, for example:

# Defaults to warning 
$ dart run architecture_linter:analyzer analyze lib --set-exit-on-severity-level=info

Then analyzer will exit with code 2 when info or higher level inconsistencies (error, warning) have been found.