The document discusses static code analysis for Swift, focusing on dependency management to understand the architecture and improve maintenance. It outlines a phased approach to analyze Swift projects, including basics of parsing imports and class relationships, with potential future enhancements for continuous integration. The presentation emphasizes the ease and benefits of utilizing such analysis tools in software development.

1. Static Swift Code Analysis
The Background Story
HelsinkiOS March 2017
Jouni Miettunen @jomtwi
Zalando Helsinki
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2. What
• Oriented graph of
dependencies between classes
• Objective-C has objc_dep
"Class A depends on B if class
A imports class B header"
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3. Why
Discover real (sub) architecture
• New features with existing APIs
• Maintenance & bug fixes
• Refactor technical dept
• Curious or new people
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4. What about swift?
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5. Compiled object files
• App / framework sources
• Fix project settings
• Update to latest swift
• Build project
• Parse compiled object files
• Open the graph
• Profit !!!
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6. Want
• Fast
• Easy
• Configure
• Parse whatever
• Profit !!!
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7. Work in progress
...
Hackweek #5
Zalando Open Source
How to Open Source at Zalando
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8. Phase 0: basics
• python
• One file or folder tree
• One line, regex
• Ignore
• swift keywords
• swift vs. Objective-C frameworks (71)
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9. Phase 1: import framework
import-kind → typealias struct class enum protocol
var func
The Swift Programming Language (Swift 3.0.1)
// Easy
import Foundation
@testable import MyFramework
// What to do
import func MyFramework.debugLog
import class MyFramework.DebugLogger
import enum MyFramework.DebugLevel
import class MyFramework.UIButton
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10. Phase 2: class inheritance
• class, protocol, struct, enum
• generics, extensions, typealias
internal final class MyClass {}
class SomeClass: Superclass, FirstProtocol {}
open class Event <ElementA, ElementB>: EventType {}
@objc protocol MyDelegate: OtherDelegate {}
public protocol OwnProtocol: class {}
"Extensions can add new nested types to existing
classes, structures, and enumerations"
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11. Phase 3: class usage
1.Definitions
2.Namespace {} and strings
3.Ignore and match
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12. Phase 4: decoration
• UI via Graphviz
• Type shapes and colors
• Point of view
• Lonely
• Circular dependencies
• Risk(ish) analysis
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13. Phase 5: future
• Continuous integration
• More circular dependencies
• Unused code
• Internal modules
• Any language
• Profit !!!
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14. Thank You!! We're hiring, too
backend
web
mobile
Profit !!!
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15. The Others
• objc_dep
• Refactorator II, The App
• Objective-C Class Dependencies Visualizer
• Swift relationship graph
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