addDependency static method

void addDependency(File file, String name, String version)

Add a dependency to pubspec.yaml.

Implementation

static void addDependency(File file, String name, String version) {
  final content = file.readAsStringSync();
  final lines = content.split('\n');
  final newLines = <String>[];
  bool added = false;
  bool inDependencies = false;

  for (int i = 0; i < lines.length; i++) {
    final line = lines[i];
    newLines.add(line);

    if (line.trim() == 'dependencies:') {
      inDependencies = true;
      continue;
    }

    if (inDependencies && !added) {
      // Find the right place to insert (after flutter_sdk or at end of deps)
      final nextLine = i + 1 < lines.length ? lines[i + 1] : '';

      // If next line is not indented or is empty section header, insert here
      if (nextLine.isNotEmpty &&
          !nextLine.startsWith(' ') &&
          !nextLine.startsWith('\t')) {
        newLines.insert(newLines.length - 1, '  $name: $version');
        added = true;
        inDependencies = false;
      }
      // If we're at a dependency line and alphabetically should insert
      else if (line.trim().isNotEmpty &&
               line.startsWith('  ') &&
               !line.trim().startsWith('#')) {
        final depName = line.trim().split(':').first;
        if (depName.compareTo(name) > 0 && !added) {
          newLines.insert(newLines.length - 1, '  $name: $version');
          added = true;
        }
      }
    }
  }

  // If not added yet, find dependencies section and add at end
  if (!added) {
    final result = <String>[];
    bool foundDeps = false;
    int lastDepIndex = -1;

    for (int i = 0; i < newLines.length; i++) {
      result.add(newLines[i]);
      if (newLines[i].trim() == 'dependencies:') {
        foundDeps = true;
      }
      if (foundDeps && newLines[i].startsWith('  ') && !newLines[i].trim().startsWith('#')) {
        lastDepIndex = result.length;
      }
      if (foundDeps && lastDepIndex > 0 &&
          newLines[i].isNotEmpty &&
          !newLines[i].startsWith(' ') &&
          !newLines[i].startsWith('\t') &&
          newLines[i].trim() != 'dependencies:') {
        result.insert(lastDepIndex, '  $name: $version');
        added = true;
        foundDeps = false;
      }
    }

    if (!added && lastDepIndex > 0) {
      result.insert(lastDepIndex, '  $name: $version');
    }

    file.writeAsStringSync(result.join('\n'));
    return;
  }

  file.writeAsStringSync(newLines.join('\n'));
}