Function getLanguageForFile

website/src/lib/parser.worker.ts:27–78

(path: string)

}

async function getLanguageForFile(path: string) {
  if (!parser) await initParser();
  const extMatch = path.match(/\.([a-zA-Z0-9]+)$/);
  if (!extMatch) return null;
  const ext = extMatch[1].toLowerCase();
  
  let wasmName = '';
  switch(ext) {
    case 'py': wasmName = 'tree-sitter-python.wasm'; break;
    case 'js':
    case 'jsx': wasmName = 'tree-sitter-javascript.wasm'; break;
    case 'ts': wasmName = 'tree-sitter-typescript.wasm'; break; 
    case 'tsx': wasmName = 'tree-sitter-tsx.wasm'; break; 
    case 'java': wasmName = 'tree-sitter-java.wasm'; break;
    case 'c':
    case 'h': wasmName = 'tree-sitter-c.wasm'; break;
    case 'cpp':
    case 'hpp':
    case 'cc': wasmName = 'tree-sitter-cpp.wasm'; break;
    case 'cs': wasmName = 'tree-sitter-c_sharp.wasm'; break;
    case 'go': wasmName = 'tree-sitter-go.wasm'; break;
    case 'rs': wasmName = 'tree-sitter-rust.wasm'; break;
    case 'rb': wasmName = 'tree-sitter-ruby.wasm'; break;
    case 'php': wasmName = 'tree-sitter-php.wasm'; break;
    case 'swift': wasmName = 'tree-sitter-swift.wasm'; break;
    case 'kt':
    case 'kts': wasmName = 'tree-sitter-kotlin.wasm'; break;
    case 'dart': wasmName = 'tree-sitter-dart.wasm'; break;
    case 'pl':
    case 'pm': wasmName = 'tree-sitter-perl.wasm'; break;
    default: return null;
  }

  if (wasmLanguageCache.has(wasmName)) {
    return wasmLanguageCache.get(wasmName);
  }

  try {
    const response = await fetch(`${location.origin}/wasm/${wasmName}`);
    if (!response.ok) {
        console.warn(`Could not load tree-sitter language: ${wasmName}. Proceeding without it.`);
        return null;
    }
    const buffer = await response.arrayBuffer();
    const lang = await Language.load(new Uint8Array(buffer));
    wasmLanguageCache.set(wasmName, lang);
    return lang;
  } catch (err) {
    console.warn(`Could not load tree-sitter language: ${wasmName}. Proceeding without it.`, err);
    return null;
  }
}

// ---------------------------------------------------------------------------
// Language-specific S-expression query strings (Query API)