Upgrade to Pro
— share decks privately, control downloads, hide ads and more …
Speaker Deck
Features
Speaker Deck
PRO
Sign in
Sign up for free
Search
Search
Write ruby code to change ruby code
Search
flyerhzm
September 19, 2014
Programming
5
3.5k
Write ruby code to change ruby code
flyerhzm
September 19, 2014
Tweet
Share
More Decks by flyerhzm
See All by flyerhzm
玩转 AST
flyerhzm
0
160
Find and Replace Code based on AST
flyerhzm
0
240
Rails Performance Tips
flyerhzm
0
1.2k
Refactor ruby code based on AST
flyerhzm
4
3.6k
基于AST的代码优化
flyerhzm
10
800
Building Asynchronous APIs
flyerhzm
25
8.9k
构建异步API服务
flyerhzm
19
7.2k
JRuby @ OpenFeint
flyerhzm
23
3.1k
Other Decks in Programming
See All in Programming
Androidアプリの One Experience リリース
nein37
0
1.1k
선언형 UI에서의 상태관리
l2hyunwoo
0
270
PHPカンファレンス 2024|共創を加速するための若手の技術挑戦
weddingpark
0
130
PHPUnitしか使ってこなかった 一般PHPerがPestに乗り換えた実録
mashirou1234
0
420
rails newと同時に型を書く
aki19035vc
5
710
DevFest - Serverless 101 with Google Cloud Functions
tunmise
0
140
カンファレンス動画鑑賞会のススメ / Osaka.swift #1
hironytic
0
160
20年もののレガシープロダクトに 0からPHPStanを入れるまで / phpcon2024
hirobe1999
0
1k
Fibonacci Function Gallery - Part 2
philipschwarz
PRO
0
210
毎日13時間もかかるバッチ処理をたった3日で60%短縮するためにやったこと
sho_ssk_
1
530
非ブラウザランタイムとWeb標準 / Non-Browser Runtimes and Web Standards
petamoriken
0
430
Package Traits
ikesyo
1
200
Featured
See All Featured
Music & Morning Musume
bryan
46
6.3k
What's in a price? How to price your products and services
michaelherold
244
12k
The Illustrated Children's Guide to Kubernetes
chrisshort
48
49k
How GitHub (no longer) Works
holman
312
140k
XXLCSS - How to scale CSS and keep your sanity
sugarenia
248
1.3M
4 Signs Your Business is Dying
shpigford
182
22k
Practical Orchestrator
shlominoach
186
10k
Save Time (by Creating Custom Rails Generators)
garrettdimon
PRO
29
950
Site-Speed That Sticks
csswizardry
2
250
Put a Button on it: Removing Barriers to Going Fast.
kastner
60
3.6k
Distributed Sagas: A Protocol for Coordinating Microservices
caitiem20
330
21k
[RailsConf 2023] Rails as a piece of cake
palkan
53
5.1k
Transcript
Write ruby code to change ruby code Richard Huang Xinmin
Labs
About Me Founder at Xinmin Labs Full Stack Developer Open
Source Enthusiast @flyerhzm
Problem
Hey, let’s use rspec new syntax for project A Yes,
sure, I love the rspec new syntax
Hey, let’s use rspec new syntax for project B Hmmm…ok
Hey, let’s use rspec new syntax for project C Oh,
no, I don’t want to repeat it again
Developers love upgrading and refactoring code
Developers hate changing code again and again
Automation
Metric Tools
Metric Tools • cane - fails your build if code
quality thresholds are not met • reek - is a tool that examines Ruby classes, modules and methods and reports any code smells it finds. • rails_best_practices - is a tool to check the quality of rails code. • ……
Tell you what to do, but can’t do for you
IDE
IDE • can rename class / method / variable name
• can extract methods • can ……
IDE • can’t customize
Based on text
Based on text Replace FactoryGirl.create with create ! $ sed
-i '' 's/FactoryGirl.create/create/g' spec/**/*.rb
Based on text Replace FactoryGirl.create with create ! !
Based on text Hard to be accurate ! ! !
!
Based on text Hard to convert complicated cases ! !
! !
Based on AST
What’s AST AST is short for Abstract Syntax Tree
What’s AST
Why AST It is much more accurate to parse ruby
code.
None
None
How to use AST • ripper • ParseTree - https://github.com/seattlerb/parsetree
• ruby_parser - https://github.com/seattlerb/ruby_parser • parser - https://github.com/whitequark/parser
How to use AST
Example transpec - https://github.com/yujinakayama/ transpec
None
Based on AST Accurate, but hard to write and read
Synvert https://github.com/xinminlabs/synvert
Demo http://xinminlabs.github.io/synvert/
None
Synvert • Add useful attributes to AST nodes ! •
Provide DSL to parse and rewrite code
Attributes for AST node
Attributes for AST node
Attributes for AST node
Attributes for AST node Check out more attributes http://xinminlabs.github.io/synvert/rules/
DSL • within_file / within_files • with_node / within_node •
if_exist_node / unless_exist_node • append / insert / insert_after / replace_with / remove • ……
DSL Check out more DSL http://xinminlabs.github.io/synvert/dsl/
None
Playground http://synvert-tools.herokuapp.com/
Snippets https://github.com/xinminlabs/synvert-snippets
Want more? • Fork and send pull request • Open
issues on github • Hire us to refactor your project
Q&A ! Thank you