Exporting Package.swift for Swift Package Manager from existing Xcode project

There are no a menu command or utility to convert application to a static library, dynamic framework or swift package since they are different types of projects with different settings etc.

If you want to export a part of your project as a swift package you should make next steps manually:

1. Create Package.swift file in the root of your project

import PackageDescription

let package = Package(
    name: “MyLib”,
    products: [
        .library(name: "MyLib", targets: ["MyLib"])
    ],
    targets: [
        .target(name: "MyLib"),
    ],
    ...
)

2. Make folder with subfolder ./Sources/MyLib under the projects’s root.

By default swift package structure requires to put all your sources files under Sources/LibraryName folder but you can change it below.

NOTE: you can simplify first two steps by using swift package init and it creates Package.swift, Sources and Test folders etc.

3. Include source files

a) Move the needed files to share from their current locations to MyLib folder.

For instance:

./Classes/MyEntity.swift -> ./Sources/MyLib/MyEntity.swift

Also you have to update locations of the moved files in your Xcode project to leave it compilable.

b) Use path, sources and exclude to point needed source files to your package from their current locations:

.target(name: "MyLib", path: "Classes"),

NOTE: Don't forget to make your classes public to access to them after import your package:

public class MyEntity {
...
}

After all you will have two working projects - old XCode's one and new Swift package.

4. REPL

Now you can use command line interpreter with your swift package:

swift run --repl
import MyLib
let entity = MyEntity()
...