Check Unused Files

Checks unused *.dart files.

To execute the command, run:

dart run dart_code_linter:metrics check-unused-files lib/

Where lib could be replaced with the directory to analyze.

Full command description:

Usage: metrics check-unused-files [arguments...] <directories>
-h, --help                                       Print this usage information.


-r, --reporter=<console>                         The format of the output of the analysis.
                                                 [console (default), codeclimate, json, gitlab]


-c, --print-config                               Print resolved config.


    --root-folder=<./>                           Root folder.
                                                 (defaults to current directory)
    --sdk-path=<directory-path>                  Dart SDK directory path.
                                                 If the project has a `.fvm/flutter_sdk` symlink, it will be used if the SDK is not found.
    --exclude=<{**/*.g.dart,**/*.freezed.dart}>  File paths in Glob syntax to be exclude.
                                                 (defaults to "{**/*.g.dart,**/*.freezed.dart}")


    --no-congratulate                            Don't show output even when there are no issues.


    --[no-]verbose                               Show verbose logs.


    --no-analytics                               Disable sending anonymous usage statistics.


    --[no-]monorepo                              Treat all exported files as unused by default.


    --[no-]fatal-unused                          Treat find unused file as fatal.
                                                 (defaults to on)


-d, --[no-]delete-files                          Delete all unused files.

Suppressing the command

In order to suppress the command add ignore_for_file: unused-files to the beginning of a file.

Cyclic usage detection

If you have several files that reference each other, but are not referenced by other files and technically are unused, the command will only detect 1 level of cyclic usage.

Monorepo support

caution

By default the command treats all files that are exported from the package as used. It uses check-exports-completeness results and won't report even transitive public entities that are not exported directly.

To disable this behavior use --monorepo flag. This might be useful when all the packages in your repository are only used within the repository and are not published to the pub.

Output example

Console

Use --reporter=console to enable this format.

JSON The reporter prints a single JSON object containing meta information and the unused file paths. Use --reporter=json to enable this format.

The root object fields are

• formatVersion - an integer representing the format version (will be incremented each time the serialization format changes)
• timestamp - a creation time of the report in YYYY-MM-DD HH:MM:SS format
• unusedFiles - an array of unused files
• automaticallyDeleted - an indication of unused files being automatically deleted

{
  "formatVersion": 2,
  "timestamp": "2021-04-11 14:44:42",
  "unusedFiles": [
    {
      ...
    },
    {
      ...
    },
    {
      ...
    }
  ],
  "automaticallyDeleted": false
}

The unusedFiles object fields are

• path - a relative path of the unused file

{
  "path": "lib/src/some/file.dart",
}

GitLab

Reports unused file issues in merge requests based on Code Quality custom tool. Use --reporter=gitlab to enable this format.