Linux support missing from cross-platform?

[idcrook]

Noticed that Swift libraries that are to be run on Linux have one slight variation in the testing that is missing from SwiftPlate.

Swift Package Manager (swift package init --type library) does additionally the following:

In Tests/{PROJECT}Tests/{PROJECT}Tests.swift it adds:

    func testExample() {
        // This is an example of a functional test case.
        // Use XCTAssert and related functions to verify your tests produce the correct results.
        XCTAssertEqual({PROJECT}().text, "Hello, World!")
    }
    static var allTests : [(String, ({PROJECT}Tests) -> () throws -> Void)] {
        return [
            ("testExample", testExample),
        ]
    }

the example assert is related to boilerplate code in the Sources/ implementation, but the allTests is more interesting, as that is the convention for the slightly different testing flow for Swift encountered under Linux.

For Linux it adds another, related file Tests/LinuxMain.swift. Its contents:

import XCTest
@testable import {PROJECT}Tests

XCTMain([
     testCase({PROJECT}Tests.allTests),
])

Could the "cross-platformness" of SwiftPlate be updated to include libraries on Linux?

[JohnSundell]

@idcrook Thanks for the very detailed issue! Super awesome 🚀 I'd love for SwiftPlate to support Linux as well! 👍

One thing is that not all libraries can support Linux (for example, if you're building a framework that depends on UIKit or some other Apple platforms-only API). So we should probably ask if the user wants to support Linux when running SwiftPlate - and if so perform the changes you listed above to the project. What do you think?

[idcrook]

I think that makes a lot of sense. 👍 I hadn't tried all the SwiftPM init types (current 3.0.1 bundled swift package has (type: empty|library|executable|system-module)), but it already has a command line switch/option to guard it. I think being prompted about it makes sense. 🎉

[JohnSundell]

Alright, so let's go with that! 👍 Let me know if you want to do the implementation as well 😉

[idcrook]

I'll look into it in a day or two if I can.

[JohnSundell]

@idcrook Awesome, no preasure - just post here if you start working on it - otherwise I (or someone else) might pick it up - would be a great feature to have 😄

[idcrook]

I created PR #20 that add the Linux library testing support. However, there a a few caveats outlined in the PR.

[JohnSundell]

@idcrook Can we close this now that #20 has been merged? 🙂

[idcrook]

Closing, with PR #20