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
3.6k
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
170
Find and Replace Code based on AST
flyerhzm
0
250
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
GAEログのコスト削減
mot_techtalk
0
120
Bedrock Agentsレスポンス解析によるAgentのOps
licux
3
880
責務と認知負荷を整える! 抽象レベルを意識した関心の分離
yahiru
8
1.2k
Unity Android XR入門
sakutama_11
0
170
Domain-Driven Transformation
hschwentner
2
1.9k
PRレビューのお供にDanger
stoticdev
1
210
CSS Linter による Baseline サポートの仕組み
ryo_manba
1
140
データの整合性を保つ非同期処理アーキテクチャパターン / Async Architecture Patterns
mokuo
53
18k
Software Architecture
hschwentner
6
2.1k
Introduction to kotlinx.rpc
arawn
0
740
Go 1.24でジェネリックになった型エイリアスの紹介
syumai
1
180
PHPカンファレンス名古屋2025 タスク分解の試行錯誤〜レビュー負荷を下げるために〜
soichi
1
580
Featured
See All Featured
How to train your dragon (web standard)
notwaldorf
91
5.8k
Raft: Consensus for Rubyists
vanstee
137
6.8k
Into the Great Unknown - MozCon
thekraken
35
1.6k
Being A Developer After 40
akosma
89
590k
What's in a price? How to price your products and services
michaelherold
244
12k
Six Lessons from altMBA
skipperchong
27
3.6k
Building an army of robots
kneath
303
45k
Rails Girls Zürich Keynote
gr2m
94
13k
Statistics for Hackers
jakevdp
797
220k
The Illustrated Children's Guide to Kubernetes
chrisshort
48
49k
Building a Modern Day E-commerce SEO Strategy
aleyda
38
7.1k
Let's Do A Bunch of Simple Stuff to Make Websites Faster
chriscoyier
507
140k
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