esaを一度解約したが、再度使い始めたときに使うスクリプト（ExportデータをそのままImport）

esa2esa.rb

#!/usr/bin/env ruby
# coding : utf-8
require 'esa'
require 'yaml'

class Importer
  attr_accessor :client, :files

  def initialize(client, dir_path)
    @client = client
    @files = Dir.glob File.expand_path(File.join(dir_path, '**/*'))
  end

  def import(dry_run: true, start_index: 0)
    files.sort.each.with_index do |file, index|
      next unless File::ftype(file) == "file"
      next unless index >= start_index

      md = File.read(file)
      
      # 先頭の記事情報をパースして本文と分離する
      md =~ /\A---(.+?)---(.+?)\z/m 
      md_info = YAML.load $1
      md_body = $2.gsub(/\/<OLD_ORGANIZATION_ID>/, '/<NEW_ORGANIZATION_ID>') # 画像のファイル名が変わるはずなので置換
      
      params = {
        name:     md_info["title"],
        category: md_info["category"],
        tags:     md_info["tags"],
        body_md:  md_body,
        wip:      !md_info["published"], # wipと対応(論理反転)
        message:  '[skip notice] Imported from API',
        user:     'esa_bot',  # 記事作成者上書き: owner権限が必要
      }

      if dry_run
        puts "***** index: #{index} *****"
        pp params
        puts
        next
      end

      print "[#{Time.now}] index[#{index}] #{params['name']} => "
      response = client.create_post(params)
      case response.status
      when 201
        puts "created: #{response.body["full_name"]}"
      when 429
        retry_after = (response.headers['Retry-After'] || 20 * 60).to_i
        puts "rate limit exceeded: will retry after #{retry_after} seconds."
        wait_for(retry_after)
        redo
      else
        puts "failure with status: #{response.status}"
        exit 1
      end
    end

  end

  private

  def wait_for(seconds)
    (seconds / 10).times do
      print '.'
      sleep 10
    end
    puts
  end

end

client = Esa::Client.new(
  access_token: '<YOUR_API_KEY>',
  current_team: '<YOUR_DOMAIN>', # 移行先のチーム名(サブドメイン)
)
importer = Importer.new(client, '<DIR>')

# dry_run: trueで確認後に dry_run: falseで実際にimportを実行
importer.import(dry_run: true, start_index: 0)