Swift Package Manager for ObjC targets

Using Swift
1

Hi!

I would like to setup Package for ObjC targets: Dynamic Library and Static Library.
I have following folder structure:

.
|── .git
|── .gitignore
|── Package.swift

|── Core
	|── FolderOne
		|── Worker.h
		|── Worker.m
	|── FolderTwo
		|── Worker2.h
		|── Worker2.m
	|── FolderThree
		|── FolderFour
			|── Worker3.h
			|── Worker3.m
	|── FrameworkSupplement
		|── UmbrellaHeader.h
		|── map.modulemap

|-- Dependencies
	|-- OneDependency
		|-- OneDependency.h
		|-- OneDependency.m

|── Framework
	|── Name
		|── Info.plist

|── Tests
	|── iOS_Tests
		|── Info.plist
	|── macOS_Tests 
		|── Info.plist
	|── SharedTests
		|── SharedTest2.m
		|── SharedTest3.m

and Package.swift:

import PackageDescription

let package = Package(
    name: "SuperLibrary",
    products: [
        .library(
            name: "SuperLibrary",
            type: .dynamic,
            targets: ["SuperLibrary"]),
    ],
    targets: [
        .target(name: "SuperLibrary",
                path: ".",
                exclude: [],
                sources: ["Core", "Dependencies/OneDependency/OneDependency.m"],
                publicHeadersPath: "Core"), // OneDependency.h is not public, it is private and had been added by hands as plain sources.
    ]
)

There is no warnings in REPL, but, it doesn't compile. Build action fails because SwiftPM can't find any of my header files ( umbrella or non-umbrella ). Also it can't handle neither framework #import <SuperLibrary/File.h> nor plain #import "File.h" ).

1 Like
2

40
40538×802 363 KB

I tried AFNetworking, and it works for me. Maybe publicHeadersPath: nil, and then put all your public headers in include directory.

1 Like
3

Is this folder virtual or physical ( file on disk )? I am not willing to change it for only swift package manager.

4

39
391868×878 221 KB 

// swift-tools-version:5.1
// The swift-tools-version declares the minimum version of Swift required to build this package.

import PackageDescription

let package = Package(
    name: "SuperLibrary",
    products: [
        // Products define the executables and libraries produced by a package, and make them visible to other packages.
        .library(
            name: "SuperLibrary",
            type: .dynamic,
            targets: ["SuperLibrary"]),
    ],
    dependencies: [
        // Dependencies declare other packages that this package depends on.
        // .package(url: /* package url */, from: "1.0.0"),
    ],
    targets: [
        // Targets are the basic building blocks of a package. A target can define a module or a test suite.
        // Targets can depend on other targets in this package, and on products in packages which this package depends on.
        .target(
            name: "SuperLibrary",
            path: "Sources",
            exclude: [],
            sources: ["Core", "Dependencies/OneDependency/OneDependency.m"],
            publicHeadersPath: "Core"),
        .testTarget(
            name: "SuperLibraryTests",
            dependencies: ["SuperLibrary"]),
    ]
)

Maybe this is what you need. No need to create include directory.

5

Can you share example project?
By the way, neither of these headers are included into each other.
So, they are pure public headers without headers imports?

6
1 Like
7

Import statements in this example has relative paths.
So, I have reached "alternative" solution by putting all headers in "Core/Include" directory.
Ugly, though.

8

I still have issues with test targets. Headers can not be marked as public or private.
By the way, .testTarget even doesn't have headers, thus, it is impossible to mix helpers/scaffolding/fixtures and test targets.

9

Another interesting problem.

Since I can't use framework import #import <Library/Umbrella.h> ( because umbrella contains framework imports, hah ), I change imports to modern style @import Library;

Everything works fine in Xcode, but I can't build package from command line: swift build throws error: "@import Library; - module not found".

As I mentioned above, I can build package in Xcode and even run tests, but command line swift build/test doesn't work at all.

10

Good News for the developers here:

Xcode 11.4 Beta2 (Doubt this is a feature or bug) now totally break publicHeadersPath usage, anything other than .h header file, will be ignored in Xcode's compile sources when put it under publicHeadersPath.

Means:

MyRepo

  • Sources
    -- Foo.h
    -- Foo.m
    -- Foo.cpp
    -- Foo.c

using

path: "Sources"
publicHeadersPath: "."

Now all the source code will been ignored, this trick not work any more :slight_smile:

You have to arrange folder strcuture, or create symbol link like this

MyRepo

  • include
    -- Foo.h
  • Sources
    -- Foo.m
    -- Foo.cpp
    -- Foo.c

using

path: "Sources"
publicHeadersPath: nil
1 Like