Update Early, Update Often

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Update Early Update Often #RubyKaigi 2015

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Jolly Good Code Juanito Fatas from Taiwan ءٝؖه٦ٕ⠓爡

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WHY!  FREQUENT UPDATE WHY?

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MAKE FUTURE UPGRADE EASIER

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REDUCE TECHNICAL DEBT

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MAINTAINER LOVE NEW BUGS

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DEVELOPERS DISLIKE LEGACY

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PERFORMANCE IMPROVEMENTS

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SECURITY VULNERABILITY

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LEARN FROM GEM UPDATES

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SHIP LATEST SOFTWARE https://jollygoodcode.github.io/2015/09/03/the-birth-of-deppbot.html

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HOWTO bundle-update(1) Quick Demo

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$ git checkout master

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$ git pull

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$ git checkout -b bundle-update-2015-12-12

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$ bundle updaet

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Could not find command "updaet"

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No content

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$ bundle update

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$ git add Gemfile.lock

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$ git comit -m "Bundle Update 2015-12-12"

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git: 'comit' is not a git command. See 'git --help'. Did you mean this? commit

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No content

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$ git commit -m "Bundle Update 2015-12-12"

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$ git pull-request -m "Bundle Update 2015-12-12" git pull-request command is from github.com/github/hub

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~ 10 minutes

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7200 per hour Juanito Fatas

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7200*10/60 ~= 1200 ¥

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3.times a month, 1200*3 = 3600¥

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3600 ¥ 蔦拉麵 900¥ ⭐

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Automation

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May I use tachikoma.io?

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Sure What is it?

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A service which runs bundle update automatically.

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Sounds good. Can try, can try.

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But... It only costs a little, $49/month.

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Hmm...  Can’t you write a simple script that does that?

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Sure I can!

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today = Time.current.strftime("%F") new_branch = "bundle-update-#{today}" `git checkout master` `git pull` `git checkout -b #{new_branch}` `bundle update` `git push origin #{new_branch}` `git pull-request -m "Bundle Update #{today}" script 'depbot'

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Works except I need to run 'depbot' from time to time

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Then I am busy

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No bundle updates

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Could you make a cronjob that runs every day?

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How about make it a service?

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Sure, do it.

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From Script to Rails app

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GitHub Org. API deppbot will send a Pull Request like a human

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Process

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git clone works for project hosts on bitbucket, submodules too

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bundle update Updates Gemﬁle.lock and install gems

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TravisCI? Not all kinds of gems can be installed on a single VPS

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bundle lock --update Updates Gemﬁle.lock without installing This command re-introduced in bundler v1.10 #3439

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diff -u "BUNDLED WITH" will be preserved

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Delete Repo on VPS immediately when we got the diff

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Cook Pull Request gem links, compare views, changelogs, time savings

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Pull Request &YBN QMF

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nokogiri Query RubyGems.org API Gem authors, please ﬁll in your metadata

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1.6.6.4…1.6.7 Parse diff and link_to repository compare view for code review Gem authors, please push your tags when release a gem

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CHANGELOG Query GitHub API, jollygoodcode/whatsnew Don’t let your friends dump git logs into CHANGELOGs