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WWDC gave us many causes to each migrate libraries to SwiftPM and to develop new ones to assist our work. The combination between Xcode growth and SwiftPM dependencies retains rising stronger and extra necessary.
Apple’s Enhancing a Package deal Dependency as a Native Package deal assumes you’ll drag in your package deal to an Xcode mission as an area package deal overrides one which’s imported via a standard package deal dependency.
In Creating a Swift Package deal in Tandem with an App, Apple writes, “To develop a Swift package deal in tandem with an app, you may leverage the habits whereby an area package deal overrides a package deal dependency with the identical title…for those who launch a brand new model of your Swift package deal or wish to cease utilizing the native package deal, take away it from the mission to make use of the package deal dependency once more.”
I don’t use this strategy. It’s not dangerous or fallacious, it simply doesn’t match my fashion.
Then again, opening the Package deal.swift file on to develop has drawbacks in that it doesn’t totally supply Xcode’s suite of IDE assist options but.
So I’ve been engaged on a private answer that greatest works for me. I would like my package deal growth and its exams to reside individually from any particular shopper app outdoors a testbed. I want to make sure that my code will swift construct and swift take a look at correctly however I additionally wish to use Xcode’s built-in compilation and unit testing with my pleased inexperienced checks.
I set out to determine how greatest, not less than for me, to develop Swift packages underneath the xcodeproj umbrella.
I first explored swift package deal generate-xcodeproj. This builds an Xcode library mission full with exams and a package deal goal. You need to use the --type flag to set the package deal to executable, system-module, or manifest as a substitute of the default (library) throughout swift package deal init:
Generate% swift package deal init Creating library package deal: Generate Creating Package deal.swift Creating README.md Creating .gitignore Creating Sources/ Creating Sources/Generate/Generate.swift Creating Checks/ Creating Checks/LinuxMain.swift Creating Checks/GenerateTests/ Creating Checks/GenerateTests/GenerateTests.swift Creating Checks/GenerateTests/XCTestManifests.swift Generate% swift package deal generate-xcodeproj generated: ./Generate.xcodeproj
Though SwiftPM creates a .gitignore file for you as you see, it doesn’t initialize a git repository. Additionally, I all the time find yourself deleting the .gitignore as I take advantage of a custom-made international ignore file. That is what the ensuing mission seems to be like:
As you see, the generated Xcode mission has every thing however a testbed for you. I actually like having an on-hand testbed, whether or not a easy SwiftUI app or a command line utility to play with concepts. I appeared into utilizing a playground however let’s face it: too gradual, too glitchy, too unreliable.
It’s a ache so as to add a testbed to this set-up, so I got here up with a distinct option to construct my base package deal setting. It’s hacky however I a lot desire the result. As an alternative of producing the mission, I begin with a testbed mission after which create my package deal. This strategy naturally packs a pattern with the package deal however none of that pattern leaks into the package deal itself:
I find yourself with three targets: the pattern app, a library constructed from my Sources, and my exams. The library folder you see right here accommodates solely an Data.plist and a bridging header. It in any other case builds from no matter Sources I’ve added.
I a lot desire this set-up to the generate-xcodeproj strategy, though it takes barely longer to set-up. The rationale for that is that SwiftPM and Xcode use completely different philosophies for a way a mission folder is structured. SwiftPM has its Sources and Checks. Xcode makes use of a supply folder named after the mission.
So I take away that folder, add a Sources group to the mission, and make sure that my construct phases sees and compiles these information. The Checks want comparable tweaks, plus I’ve so as to add a symbolic hyperlink from Xcode’s exams title (e.g. “ProjectNameChecks”) to my SwiftPM Checks folder on the prime degree of my mission to get it to all hold collectively. As soon as I’ve finished so my inexperienced checks are prepared and ready simply as if I had opened the Package deal.swift file instantly. However this time, I’ve all the fitting instruments at hand.
Since I’m speaking about set-up, let me add that my duties additionally embody organising the README, including a license and creating the preliminary change log. These are SwiftPM setup duties that swift package deal init doesn’t cowl the best way I like. I trash .gitignore however since I’ve Xcode set-up to mechanically initialize model management, I don’t need to git init by hand.
I believe it is a short-term workaround as I count on the mixing of SwiftPM and Xcode to proceed rising over the following couple of years. Since WWDC, I’ve been significantly enthusiastic about growing, deploying, and integrating SwiftPM packages. I believed I’d share this in case it would assist others. Let me know.
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