Slack Wandbox Bot https://twitter.com/myon___/status/690754708630204416

bot.rb

require 'slack-ruby-client'
require 'wandbox'
require './config.rb'

Slack.configure do |conf|
  conf.token        = TOKEN
  conf.logger       = Logger.new(STDOUT)
  conf.logger.level = Logger::WARN
end

client = Slack::RealTime::Client.new

client.on :hello do
  puts "Successfully connected, welcome '#{client.self.name}' to the '#{client.team.name}' team at https://#{client.team.domain}.slack.com."
end

client.on :message do |data|
  case data.text
  when "<@#{client.self.id}> help" then
    client.message channel: data.channel, text: <<-EOS
<@#{data.user}> (✘╹◡╹)ﾉ できること
*プログラムの実行*
• `run code` : codeをC++として実行
• `run:lang code` : codeをlangとして実行
    EOS
  when /^run(?::([[:graph:]]+))?\s(.+)$/m then
    client.typing channel: data.channel

    code     = Slack::Messages::Formatting.unescape(Regexp.last_match(2))
    lang     = Regexp.last_match(1).nil? ? 'C++' : Regexp.last_match(1)
    compiler = Wandbox.lang2compiler(lang)

    if compiler.nil?
      client.message channel: data.channel,
                     text:    "`#{lang}` は対応してないです... (｡･_･｡✘)"
    else
      result = Wandbox.run compiler['name'], code

      messages = []

      messages << if result['status'] == '0'
                    ':tada: ∩(＞◡＜✘)∩'
                  else
                    ':sweat_drops:ヾ(｡>﹏<｡✘)ﾉﾞ'
                  end

      messages << "lang: `#{lang}` compiler: `#{compiler['name']}`"
      messages << "```\n#{code}\n```"

      if !result['compiler_error'].nil?
        messages << 'compiler_error:'
        messages << ">>> #{result['compiler_error']}"
      elsif !result['program_message'].nil?
        messages << 'program_message:'
        messages << ">>> #{result['program_message']}"
      end

      client.message channel: data.channel, text: messages.join("\n")
    end
  end
end

client.on :close do |_data|
  puts 'Connection closed, exiting.'
end

client.start!

Dockerfile

FROM ruby:2.6-alpine

ADD bot.rb config.rb Gemfile /usr/src/app/
WORKDIR /usr/src/app/

RUN \
  apk upgrade --no-cache && \
  apk add --no-cache --virtual gem-dependencies \
    libgcc \
    libstdc++ \
    openssl-dev && \
  apk add --no-cache --virtual build-dependencies \
    build-base && \
  bundle install && \
  apk del build-dependencies

CMD ["bundle", "exec", "ruby", "bot.rb"]

Gemfile

source 'https://rubygems.org'

# Slack
gem 'slack-ruby-client', '~> 0.11.0'
gem 'eventmachine'
gem 'faye-websocket'

gem 'wandbox'