s2sでコメントを挿入する実験 (Babel6でも動くバージョン)

test.js

const plugin = babel => {
  const {types: t} = babel

  return {
    inherits: inheritsOpts,
    name: 's2s-jsdoc-creator',
    visitor: {
      Function(nodePath, state) {
        const comment = `*
        * @hoge
        * @fuga
        `.split('\n').map(line => line.trim()).join('\n')

        const stPath = nodePath.getStatementParent()
        // assert inList
        stPath.insertBefore(t.emptyStatement())
        stPath.getPrevSibling().addComment('trailing', comment)
      },
    },
  }
}