Package a library

March 15, 2024

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There are two ways to create a Swift package for a library: using the command line and using Xcode. Each approach is discussed in the following sections.

Command line

Use the commands shown below to create a library package. Notice the name of the package is MyPackage while the directory is called mypkg. If a name is not provided to the swift package command then the directory name is used as the package name.

mkdir mypkg
cd mypkg
swift package init --name MyPackage

The type of package can be explicitly given as shown here. By default, a library package is created so there is no need to define the type for this example.

swift package init --type library --name MyPackage

The file structure after creating the package is shown below.

mypkg/
├── Sources/
│   └── MyPackage/
│       └── MyPackage.swift
├── Tests/
│   └── MyPackageTests/
│       └── MyPackageTests.swift
├── .gitignore
└── Package.swift

Use the swift test command to run the tests for the package.

Xcode

Select File > New > Package... then choose Multiplatform Library to create a package in Xcode. The name you provide in the Save As field will be used as the name of the package. The image below shows the Xcode Project Navigator for a package named MyPackage. To run the tests, select Product > Test from the menu or press Command U on the keyboard.