removeImport static method

Future<void> removeImport({ required String filePath, required List<String> importStatements, })

Drops importStatements from filePath if they are present.

Templates carry every import a generated file might need; the ones the generated variant does not use have to come back out, or the project is left with unused_import warnings it did not ask for.

Implementation

static Future<void> removeImport({
  required String filePath,
  required List<String> importStatements,
}) async {
  final file = File(filePath);
  if (!file.existsSync()) {
    return;
  }
  final lines = await file.readAsLines();
  final Set<String> unwanted =
      importStatements.map((e) => collapseWhitespace(e)).toSet();
  final List<String> kept = lines
      .where((line) => !unwanted.contains(collapseWhitespace(line)))
      .toList();
  if (kept.length != lines.length) {
    await file.writeAsString(kept.join('\n'));
  }
}