When I perform a flutter run I get an error
Target file "lib/main.dart" not found.
Why is this happening and how can I fix this ?
You can run any file from any DIR provided that you set the target file path, example:
flutter run -t lib/main_dev.dart
OR
flutter run lib/dev/main_dev.dart
UPDATE (2020 February 5th)
It is however not advisable to remove main.dart from your project.
I'm sure most of you found this link because you are setting up / configuring your app to accommodate for different environments e.g. dev, stg, beta and prod.
Example:
main_dev.dart:
void main() async {
dynamic configuredApp = AppConfig(
appName: 'Flutter',
flavorName: 'development',
appVersion: 1.0,
apiBaseUrl: 'https://dev-api.example.com/'
);
runApp(App(configuredApp));
}
main.dart
class App extends StatefulWidget {
final dynamic configuredApp;
App(this.configuredApp);
@override
_AppState createState() => _AppState();
}
As it turns out some build steps will fail in Android Studio mostly Gradle related if you don't have a main.dart file and method main() {} referenced inside this file.
An alternative to flutter run -t lib/main_dev.dart
in VS Code with the debugger tool.
.vscode/launch.json
"configurations": [
{
"name": "Flutter",
"request": "launch",
"type": "dart",
// "args": ["--enable-software-rendering"]
// "flutterMode": "profile", //debug //release
"program": "${workspaceFolder}/lib/main_dev.dart"
}
]