临时笔记

[chenjf5]

babel

Core-transformation-index.js

export function runSync(
  config: ResolvedConfig,
  code: string,
  ast: ?(BabelNodeFile | BabelNodeProgram),
): FileResult {
  const file = normalizeFile(
    config.passes,
    normalizeOptions(config),
    code,
    ast,
  );

  transformFile(file, config.passes);

  const opts = file.opts;
  const { outputCode, outputMap } =
    opts.code !== false ? generateCode(config.passes, file) : {};

  return {
    metadata: file.metadata,
    options: opts,
    ast: opts.ast === true ? file.ast : null,
    code: outputCode === undefined ? null : outputCode,
    map: outputMap === undefined ? null : outputMap,
    sourceType: file.ast.program.sourceType,
  };
}

normalizeFile

调用@babel/parser