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Injectable

Injectable is static dependency injection framework for Swift.

Injectable aims to achieve the following primary goals.

1. High customizability and flexibility.

2. Dependency resolving logic has high independence from project code. If you unaccept auto-generating in your project, you will easily drop this framework.

Usage

Injectable Protocol

Injectable protocol provides dependency injection tree.

public protocol Injectable {
    associatedtype Dependency
}

public protocol InitInjectable: Injectable {
    init(dependency: Dependency)
}

public protocol FactoryInjectable: Injectable {
    static func make(dependency: Dependency) -> Self
}

You can implement Injectable protocol to provide dependency injection.

final class HomeViewModel: HomeViewModelProtocol, InitInjectable {

    struct Dependency {
        let userID: String
        let apiClient: APIClientProtocol
    }

    private let dependency: Dependency

    init(dependency: Dependency) {
        self.dependency = dependency
    }
}

Resolvable

Resolvable protocol enables to resolve dependency injection tree.

public protocol Resolvable {
    associatedtype Impls
    static var impls: Impls! { get }
}

You need to implement Resolvable protocol to resolve dependency injection tree.

extension HomeViewModel: Resolvable {
    static var impls: (APIClient)!
}

di-resolver

If you auto-generate resolving code, you can use di-resolver. di-resolver is command line tool for auto-generating dependency injection.

di-resolver uses Resolver framework. Resolver provides auto-generating dependency injection code through Injectable and Resolvable.

$ TODO

If you execute above shell, you will auto generate dependency resolving code.

extension HomeViewModel.Dependency {
    init(userID: String) {
        self.userID = userID
        self.apiClient = APIClient(dependency: .init())
    }
}

Installation

Binary

CocoaPods

Requirements

• Swift5.0+ / Xcode 11+

Attribution

This tool is affected by

• DIKit
• Needle
• Dagger

And powered by

• SourceKitten