Swift Package Examples

Collection of examples creating and using Swift Packages and the Swift Package Manager.

HelloWorld Swift Package

• Created via swift package init.
• Removed Linux specific testing stuff.
  • LinuxMain.swift
  • XCTestManifests.swift
  • HelloWorldTests.allTests
  • This might not be required for Linux in the future: https://forums.swift.org/t/pitch-enable-test-discovery-by-default/36619
• Implemented some simple behavior, including tests.
• Test can be run via command line swift test.
• Made sure to mark functionality (functions, properties, etc.) as public.
  • This includes an empty public init() in order to initilize the class from outside of the package.

HelloLabel Swift Package

• Created by hand.
  • This means I had to create the gitignore file by hand as well.
• Created a label subclass, which required to import UIKit.
  • Importing UIKit breaks swift build and swift test on the command line.
  • The package itself and all consumers require Xcode from now on.
  • You have to select an iPhone Simulator to build, My Mac no longer works.
• Added .iOS(.v13) as plattform.
• Added HelloWorld package as dependency.
• Implemented basic functionality.

MultiPackage Swift Package

• Created by hand, with two products and two targets.
• Using different names for folder, package, targets and products.
• Added as dependency to the HelloLabel package.
  • Because of the differnt names and multiple products, the definition of dependecy is bit more complex.
  • See commit 9dc83ad7
• Insights gathered from this experience:
  • Under dependencies you have the mention to location of the package.
    • You also have to mention the package name if it is differnt from the folder name.
  • Under target/dependencies you have to name the product.
    • You also have to name the package if it has a different name or if there are multiple products withint the same package.
  • When using the import statement in your code, you have to mention the module, which is identical to the target.