https://blog.toright.com/posts/600/continuous-integration-%e6%8c%81%e7%ba%8c%e6%95%b4%e5%90%88%e8%88%87%e6%af%8f%e6%97%a5%e5%bb%ba%e7%bd%aenightly-build-hudson-%e4%bb%8b%e7%b4%b9