It’s been four years of Swift at Airbnb. The language has changed and our practices have too. Today, we’re sharing how we write Swift.
Overview
Airbnb has open-sourced its Swift Style Guide, reflecting four years of experience using Swift. The guide aims to standardize coding practices among engineers and contribute back to the Swift community by sharing effective patterns and practices.
What You'll Learn
1
How to adopt standardized Swift coding practices in your projects
2
Why using SwiftLint and SwiftFormat can improve code quality
3
When to contribute to open-source projects like the Airbnb Swift Style Guide
Key Questions Answered
What is the purpose of the Airbnb Swift Style Guide?
The Airbnb Swift Style Guide aims to standardize coding practices among engineers to reduce inconsistencies and improve code quality. It was developed to prevent code from resembling a 'Jackson Pollock painting' due to varying personal styles, ensuring a cohesive codebase.
Why did Airbnb decide to open source its Swift Style Guide?
Airbnb chose to open source its Swift Style Guide to give back to the Swift community, sharing the standardized patterns they have developed over the years. They recognize that the community has influenced their practices and welcome feedback and contributions from others.
How has Airbnb evolved its use of Swift since 2014?
Since starting with Swift in 2014, Airbnb has migrated its codebase through various Swift versions, from Swift 1.1 for the Apple Watch app to Swift 4 by October 2017. This evolution reflects their commitment to adopting the latest features and practices in Swift development.
What tools does Airbnb use to enforce its Swift Style Guide?
Airbnb uses SwiftLint and SwiftFormat to enforce its Swift Style Guide. These tools help automate the identification and correction of style guide violations, ensuring that the code adheres to the established standards without manual intervention.
Technologies & Tools
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Programming Language
Swift
Used for developing Airbnb's mobile applications and implementing the style guide.
Tool
Swiftlint
A linter used to enforce the Swift Style Guide.
Tool
Swiftformat
A formatter used to apply style rules defined in the Swift Style Guide.
Key Actionable Insights
1Implementing a style guide can significantly enhance team collaboration and code quality.By adopting a standardized style guide like Airbnb's, teams can minimize discussions around code style during pull requests, allowing them to focus on functionality and logic instead.
2Utilizing tools like SwiftLint and SwiftFormat can streamline code reviews and maintain consistency.These tools automate style checks, reducing the burden on developers to manually enforce style rules and allowing for quicker integration of new features.
3Contributing to open-source projects fosters community engagement and personal growth.By sharing your insights or improvements to the Airbnb Swift Style Guide, you can enhance your skills while also helping others in the Swift community.
Common Pitfalls
1
Allowing personal coding styles to dominate a codebase can lead to inconsistencies.
This often results in confusion and increased time spent on code reviews. Establishing a style guide helps mitigate this issue by providing clear standards for all developers.