The Swift Open Source Tour

Did you know Apple released a Swift library that allows you to parse and modify Swift code? Were you aware that parts of Xcode are Open Source? You heard about SwiftNIO, the event-driven networking framework, but never tried it out? Let David take you through a pragmatic tour of those projects and explain how to take advantage of each of them in your day-to-day work.

Transcript

1. David Hart Open Source Swift Tour Tips & Tricks from the Field
2. SwiftPM Contributor iOS Developer at Atipik David Hart
4. iBrew
5. 100%
6. P E N S O O U R C E
7. Ain’t nobody got time for that!
8. Early History December 2015
9. Swift Compiler
10. Swift Compiler Introduction: December 2015 Language: C++ https://github.com/apple/swift
11. Swift Compiler
12. Swift Compiler
13. Swift Compiler
14. That's all nice and fancy, but how is that useful to me? Swift Compiler
15. Standard Library
16. Introduction: December 2015 Language: Swift & C++ https://github.com/apple/swift Standard Library
17. Standard Library stdlib/public/core
18. @inlinable public func reduce<Result>( _ initialResult: Result, _ next: (Result, Element) throws -> Result ) rethrows -> Result { var accumulator = initialResult for element in self { accumulator = try next(accumulator, element) } return accumulator } SE-0193 Standard Library
19. GYB
20. Generate Your Boilerplate G Y B
21. I could use that! Generate Your Boilerplate GYB
22. %{ ... }% % ... ${ ... } % end Multiline code Single-line control flow Control flow end Substitution GYB
23. %{ aliases = { 'ibu': 'internationalBitteringUnits', 'abv': 'alcoholByVolume', 'ebc': 'europeanBreweryConvention', 'srm': 'standardReferenceMethod' } }% extension Beer { % for property, alias in aliases.items(): var ${property}: Int { get { return ${alias} } set { ${alias} = newValue } } % end } GYB
24. $ brew install nshipster/formulae/gyb for file in **/*.gyb do done gyb —line-directive '' \ -o "${file%.gyb}" \ “$file" done Install Xcode Build Script GYB
25. Swift Core Libraries
26. Introduction: December 2015 Language: Swift https://github.com/apple/swift-corelibs-libdispatch Swift Core Libraries
27. Swift Core Libraries Introduction: December 2015 Language: Swift https://github.com/apple/swift-corelibs-xctest
28. Swift Core Libraries Introduction: December 2015 Language: Swift https://github.com/apple/swift-corelibs-foundation
29. Swift Core Libraries
30. Swift Core Libraries Docs/Status.md
31. Swift Package Manager
32. Swift Package Manager Introduction: December 2015 Language: Swift https://github.com/apple/swift-package-manager
33. Swift Package Manager Oh?
34. // swift-tools-version:4.2 import PackageDescription let package = Package( name: "iBrew", products: [], dependencies: [ .package( url: "https://github.com/realm/SwiftLint.git", .exact(“0.30.1")) ], targets: [] ) Swift Package Manager
35. $ swift run swiftlint Swift Package Manager Swift 5.0
36. Swift Evolution
37. Swift Evolution Proposal Accepted Rejected Pitch Introduction: December 2015 Language: Markdown https://github.com/apple/swift-evolution Review
38. I’m already tired just listening to this. Swift Evolution
39. Swift Evolution https://apple.github.io/swift-evolution
40. Bug Tracker
41. Bug Tracker Introduction: December 2015 Language: English https://bugs.swift.org
42. Bug Tracker I’m getting angry just thinking about Radar
43. SourceKit
44. SourceKit Introduction: December 2015 Language: C++ https://bugs.swift.org SourceKitService Terminated Editor functionality temporarily limited.
45. SourceKitten ? SwiftLint
46. Dark Ages 2016-2017
47. Swift Protobuf
48. Proto-what? Swift Protobuf
49. Swift Protobuf Introduction: September 2016 Language: Swift https://github.com/apple/swift-protobuf
50. Swift Protobuf 5-10x Faster than JSONCoder/Decoder
51. Swift Protobuf 2x Faster at JSON than JSONCoder/Decoder
52. Swift Protobuf syntax = "proto3"; message Beer { int64 id = 1; string name = 2; string brewer = 3; int32 abv = 4; }
53. $ protoc --swift_out=. Beer.proto Swift Protobuf
54. var beer = Beer.with { $0.id = 1070 $0.name = "Tempête" $0.brewer = "Docteur Gab's" $0.abv = 8 } let data = try beer.serializedData() beer = try Beer(serializedData: data) let jsonData = try beer.jsonUTF8Data() beer = try Beer(jsonUTF8Data: jsonData) Swift Protobuf
55. Compatibility Test Suite
56. Compatibility Test Suite Introduction: April 2017 Language: JSON https://github.com/apple/swift-source-compat-suite
57. But how does that help ME? Compatibility Test Suite
58. { "repository": "Git", "url": "https://github.com/ibrew/beer-kit.git", "path": "BeerKit", "branch": "master", "maintainer": "james@ibrew.com", "compatibility": [ { "version": "4.2", "commit": "195cd8cde2bb717242b3081f9c367ccd0a2f0121" } ], "platforms": ["Darwin"], "actions": [ { "action": "BuildXcodeWorkspaceScheme", "workspace": "BeerKit.xcworkspace", "scheme": "BeerKit", "destination": "generic/platform=iOS", "configuration": "Release" } ] } Compatibility Test Suite
59. Renaissance 2018
60. Swift Forums
61. Swift Forums Introduction: January 2018 Language: English https://forums.swift.org
62. Swift Forums
63. Swift Forums TL;DR
64. Swift Forums Announcement
65. Swift Forums Using Swift
66. Swift Forums Evolution / Proposal Reviews
67. SwiftNIO
68. SwiftNIO Introduction: March 2018 Language: Swift https://github.com/apple/swift-nio
69. SwiftNIO
70. SwiftNIO
71. Swift Syntax
72. Swift Syntax Introduction: August 2018 Language: Swift https://github.com/apple/swift-syntax
73. Swift Syntax if beer.abv > 6 { print("Strong") }
74. Swift Syntax if beer.abv > 6 { print("Strong") }
75. Swift Syntax Spaces, Newlines, Comments Trivia Tokens if, {, }, 45, ”Hello” A token owns all of the trivia following it up to the next token or newline A token owns all of the trivia preceding it that isn’t owned by another token
76. Swift Syntax if beer.abv > 6 { } print("Strong")
77. Swift Syntax Conditions If Statement Body Statements if beer.abv > 6 { } print("Strong")
78. Swift Syntax let url = URL(fileURLWithPath: CommandLine.arguments[1]) var syntax = try SyntaxTreeParser.parse(url) syntax = IfFormatter().visit(sourceSyntax) try syntax.description.write(to: url, atomically: true, encoding: .utf8)
79. class IfFormatter: SyntaxRewriter { open override func visit(_ node: IfStmtSyntax) -> StmtSyntax { var node = node if node.ifKeyword.trailingTrivia != .spaces(1) { node = node.withIfKeyword( node.ifKeyword.withTrailingTrivia(.spaces(1))) } if node.conditions.trailingTrivia != .spaces(1) { node = node.withConditions( node.conditions.withTrailingTrivia(.spaces(1))) } if node.body.leftBrace.leadingTrivia?.count != 0 { node = node.withBody( node.body.withLeftBrace( node.body.leftBrace.withoutLeadingTrivia())) } if node.body.leftBrace.trailingTrivia?.count != 0 { node = node.withBody( node.body.withLeftBrace( node.body.leftBrace.withoutTrailingTrivia())) } return node } }
80. Swift Syntax if beer.abv > 6 { } print("Strong")
81. Swift Docker Image
82. Swift Docker Image Introduction: December 2018 Language: Docker https://github.com/apple/swift-docker
83. Swift Docker Image $ docker run -it swift:latest /bin/bash
84. Swift Docker Image $ docker-compose exec swift test —-parallel $ docker-compose exec swift run Build & Test Build & Run
85. Follow up $ Come talk to me ! Swift Blog https://swift.org/blog # Swift Community Podcast https://www.swiftcommunitypodcast.org " Swift Weekly Brief https://swiftweekly.github.io Swift Forums https://forums.swift.org
86. Thanks! dhartbit hartbit