extractModuleVersion static method

Future<String?> extractModuleVersion(String jarPath)

Extracts the version information from a JAR file

Attempts to determine the module version by examining:

• META-INF/MANIFEST.MF for Implementation-Version or Bundle-Version
• Falls back to extracting version information from the filename

jarPath The path to the JAR file Returns the module version if found, null otherwise

Implementation

static Future<String?> extractModuleVersion(String jarPath) async {
  try {
    final jarFile = File(jarPath);
    if (!await jarFile.exists()) {
      return null;
    }

    final bytes = await jarFile.readAsBytes();
    final archive = ZipDecoder().decodeBytes(bytes);

    final manifestFile = archive.files.firstWhere(
      (file) => file.name.toUpperCase() == 'META-INF/MANIFEST.MF',
      orElse: () => ArchiveFile('', 0, []),
    );

    if (manifestFile.size > 0) {
      final content = String.fromCharCodes(manifestFile.content as List<int>);
      final lines = content.split('\n');

      for (final line in lines) {
        if (line.startsWith('Implementation-Version:')) {
          return line.substring('Implementation-Version:'.length).trim();
        } else if (line.startsWith('Bundle-Version:')) {
          return line.substring('Bundle-Version:'.length).trim();
        }
      }
    }

    final fileName = p.basename(jarPath);
    final versionPattern = RegExp(r'-(\d+(\.\d+)*(-[a-zA-Z0-9]+)?)\.jar$');
    final match = versionPattern.firstMatch(fileName);

    if (match != null) {
      return match.group(1);
    }

    return null;
  } catch (e) {
    debugPrint('Error extracting module version from $jarPath: $e');
    return null;
  }
}