writeVersion method

void writeVersion(File pubspecFile, ProjectVersion newVersion)

Writes newVersion into pubspecFile preserving all unrelated formatting and comments.

Implementation

void writeVersion(File pubspecFile, ProjectVersion newVersion) {
  if (!pubspecFile.existsSync()) {
    throw ValidationException(
        'pubspec.yaml not found at path "${pubspecFile.path}".');
  }

  final lines = pubspecFile.readAsLinesSync();
  bool updated = false;
  final updatedLines = <String>[];

  for (final line in lines) {
    final trimmed = line.trim();
    if (!updated &&
        trimmed.startsWith('version:') &&
        !trimmed.startsWith('#')) {
      final leadingSpaces = line.substring(0, line.indexOf('version:'));
      updatedLines.add('${leadingSpaces}version: $newVersion');
      updated = true;
    } else {
      updatedLines.add(line);
    }
  }

  if (!updated) {
    throw const ValidationException(
        'Failed to locate "version:" line in pubspec.yaml to update.');
  }

  pubspecFile.writeAsStringSync('${updatedLines.join('\n')}\n');
}