`dart format` does not put new line between 'sections'

[aeb-dev]

Steps to reproduce:

dart create -t console test_format
cd test_format
dart pub add args

Create following file under lib

import "dart:io";
import "package:args/args.dart";

void func() {
}

Call dart format .
As stated in Effective Dart: Style, the file should be changed to:

import "dart:io";

import "package:args/args.dart";

void func() {
}

but it does not.

• Dart SDK version: 2.17.5 (stable) (Tue Jun 21 11:05:10 2022 +0200) on "windows_x64"

[munificent]

Good catch. The formatter doesn't do any import reordering (because that can be surprisingly complex), but it could at least insert a newline between dart: and package imports.

[aeb-dev]

I do not know how the internals work but since it can already detected can't it be ordered easily?

[munificent]

Reordering code can get difficult when things like comments and commented out code is involved. To avoid potentially reordering things in ways that don't make sense, the formatter is currently restricted to only insert and remove whitespace but never change the order of any code or comments.

The warnings here come from a different tool than the formatter.

[aeb-dev]

It is from dart analyzer. dart fix --apply fixes the warning

[alexeyinkin]

Just reminding that package imports also should be separated from relative imports.