Using Open Source Swift in Linux Mint

Transcript

1. Using Open Source Swift in Linux Mint Ron Mourant Boston Swift Meetup April 13, 2016 https://medium.com/@ronm333 http://opensourceswift.co Twitter: @ronm333 1
2. Topics ➤ Installation of LinuxMint in a Virtual Machine: A Development Environment for Swift ➤ Install Apple’s Linux Swift in LinuxMint ➤ An Introduction to the Swift Package Manager on Linux 2
3. Installation of LinuxMint in a Virtual Machine:
 A Development Environment for Swift Switching between the host (Mac OS X) and client (LinuxMint 17.3) is done by just a mouse click. 
 Copying and Pasting between Mac OS X and LinuxMint is easy.
 Saving and restoring the LinuxMint client is fast. Virtual Box is a pleasure to work with. 3
4. Install Apple’s Linux Swift in LinuxMint 4 Swift 3.0-dev is needed for the Swift Package Manager I downloaded the Ubuntu 14.04 dated April 12, 2016. The folder name is: swift-DEVELOPMENT-SNAPSHOT-2016-04-12-a-ubuntu14.04.tar.gz Code in the blog needs to be updated to reflect the new date.
5. Install Apple’s Linux Swift in LinuxMint 5 The installation process entails: Step 1: Install Dependencies sudo apt-get install clang libicu-dev Step 2: Download Apple’ Swift 3.0-dev for Linux Step 3: Unpack the Tarball Step 4: Put swift in the PATH environment variable and Make the Change Permanent.
6. Install Apple’s Linux Swift in LinuxMint 6 mint@mint ~ $ mkdir swiftHello
 mint@mint ~ $ cd swiftHello
 
 mint@mint ~/swiftHello $ cat > helloworld.swift
 print("This is Hello World via Swift") // Press return and enter a control-d
 
 mint@mint ~/swiftHello $ cat helloworld.swift 
 print(“This is Hello World via Swift”) // Press return and enter a control-d
 
 mint@mint ~/swiftHello $ swift helloworld.swift 
 This is Hello World via Swift
 
 mint@mint ~/swiftHello $ swiftc helloworld.swift
 mint@mint ~/swiftHello $ ls -l
 -rwxr-xr-x 1 mint mint 10100 Apr 9 13:57 helloworld
 -rw-r--r-- 1 mint mint 77 Apr 9 13:54 helloworld.swift
 
 mint@mint ~/swiftHello $ ./helloworld
 This is Hello World via Swift
7. An Introduction to the Swift Package Manager on Linux 7 The Swift Package Manager is a tool that enables the easy distribution of Swift source code, executables and libraries. It handles dependencies, compiles source files, and links Swift packages. HelloPackage
 |— Package.swift
 |— Sources
 | |— main.swift
 | |— Greeter.swift
 |— .build
 | |—debug
 | |— HelloPackage
8. An Introduction to the Swift Package Manager on Linux 8 The swift build command creates an executable named HelloPackage, and places it in the hidden directory .build/debug. mint@mint ~/HelloPackage/Sources $ swift build mint@mint ~/HelloPackage $ .build/debug/HelloPackage Hello World Package from Getting Started
9. An Introduction to the Swift Package Manager on Linux 9 Multiple Source Files mint@mint ~/HelloPackage/Sources $ sudo gedit Greeter.swift func sayHello(name: String) { print("Hello, \(name)! This is the World Package from Getting Started.") } mint@mint ~/HelloPackage/Sources $ ls Greeter.swift main.swift Getting Command Line Arguments if Process.arguments.count != 2 { print("Usage: HelloPackage NAME") } else { let name = Process.arguments[1] sayHello(name) }
10. An Introduction to the Swift Package Manager on Linux 10 Rebuild the package mint@mint ~/HelloPackage/Sources $ swift build
 Compiling Swift Module 'HelloPackage' (2 sources) Linking ../.build/debug/HelloPackage Run the revised program mint@mint ~/HelloPackage $ .build/debug/HelloPackage Ron Hello, Ron! This is the World Package from Getting Started. https://swift.org/package-manager/
11. More - Swift Package Library 11 A library is a package that builds a module which can be imported
 by other packages. example-package-playingcard ├── Sources │ ├── PlayingCard.swift │ ├── Rank.swift │ └── Suit.swift └── Package.swift Running swift build produces the static library PlayingCard.a example-package-fisheryates-1.0.1 │ ├── Package.swift │ ├── README.md │ └── Sources The fisheryates package implements the shuttle() an shuffleInPlace() methods
12. More - Swift Package Library 12 The DeckOfPlayingCards package includes the previous two packages.
 Its manifest file includes dependencies. import PackageDescription let package = Package( name: "DeckOfPlayingCards", targets: [], dependencies: [ .Package(url: "https://github.com/apple/example-package-fisheryates.git", majorVersion: 1), .Package(url: "https://github.com/apple/example-package-playingcard.git", majorVersion: 1), ] )
13. More - Swift Package Library 13 Note the static libraries below, generated by the swift build command. example-package-deckofplayingcards ├── .build │ └── debug │ ├── DeckOfPlayingCards.a │ ├── DeckOfPlayingCards.o │ ├── DeckOfPlayingCards.swiftdoc │ ├── DeckOfPlayingCards.swiftmodule │ ├── FisherYates.a │ ├── FisherYates.o │ ├── FisherYates.swiftdoc │ ├── FisherYates.swiftmodule │ ├── PlayingCard.a │ ├── PlayingCard.o │ ├── PlayingCard.swiftdoc │ └── PlayingCard.swiftmodule └── Packages └── example-package-fisheryates-1.0.1 │ ├── Package.swift │ ├── README.md │ └── Sources └── example-package-playingcard-1.0.0 ├── Package.swift ├── README.md └── Sources
14. More - Swift Package Library 14 The Dealer module depends on the DeckOfPlayingCards package.
 Here is its manifest file. import PackageDescription let package = Package( name: "Dealer", targets: [], dependencies: [ .Package(url: "https://github.com/apple/example-package-deckofplayingcards.git", majorVersion: 1), ] ) The Sources directory of Dealer package includes main.swift.
 This causes the swift build command to produce the Dealer executable. https://github.com/apple/swift-package-manager