test/deps/goldens/dart_executables.txt

'-- myapp
    |-- bin
    |   |-- bar.dart
    |   '-- foo.dart
    '-- pubspec.yaml

$ pub deps --executables
myapp: bar, foo

$ pub deps --executables --dev
myapp: bar, foo

$ pub deps --json
{
  "root": "myapp",
  "packages": [
    {
      "name": "myapp",
      "version": "0.0.0",
      "kind": "root",
      "source": "root",
      "dependencies": []
    }
  ],
  "sdks": [
    {
      "name": "Dart",
      "version": "0.1.2+3"
    }
  ],
  "executables": [
    ":bar",
    ":foo"
  ]
}