insertInFirstLine static method

void insertInFirstLine({
  1. required String filePath,
  2. required String newLine,
})

Implementation

static void insertInFirstLine({
  required String filePath,
  required String newLine,
}) {
  File file = File(filePath);
  List<String> lines = file.readAsLinesSync();
  lines.insert(0, newLine);
  file.writeAsStringSync(lines.join('\n'));
}