Swift Package Manager 2026 완벽 가이드: 패키지 생성, 배포, 면접 질문

import PackageDescription

let package = Package(
    name: "NetworkKit",
    platforms: [
        .iOS(.v15),
        .macOS(.v12)
    ],
    products: [
        .library(
            name: "NetworkKit",
            targets: ["NetworkKit"]
        )
    ],
    dependencies: [
        .package(
            url: "https://github.com/Alamofire/Alamofire.git",
            from: "5.9.0"
        )
    ],
    targets: [
        .target(
            name: "NetworkKit",
            dependencies: ["Alamofire"]
        ),
        .testTarget(
            name: "NetworkKitTests",
            dependencies: ["NetworkKit"]
        )
    ]
)

# Create a library package
mkdir NetworkKit && cd NetworkKit
swift package init --type=library

# Generated structure:
# NetworkKit/
# ├── Package.swift
# ├── Sources/
# │   └── NetworkKit/
# │       └── NetworkKit.swift
# └── Tests/
#     └── NetworkKitTests/
#         └── NetworkKitTests.swift

dependencies: [
    // Semantic versioning: 5.9.0 up to next major
    .package(url: "https://github.com/Alamofire/Alamofire.git", from: "5.9.0"),
    
    // Exact version: locks to 5.9.1
    .package(url: "https://github.com/Alamofire/Alamofire.git", exact: "5.9.1"),
    
    // Version range: 5.8.0 to 5.9.9
    .package(url: "https://github.com/Alamofire/Alamofire.git", "5.8.0".."5.9.9"),
    
    // Branch reference: for development
    .package(url: "https://github.com/Alamofire/Alamofire.git", branch: "main"),
    
    // Commit reference: pinned to specific commit
    .package(url: "https://github.com/Alamofire/Alamofire.git", revision: "abc123")
]

import UIKit
import Alamofire // Available after adding via Xcode

@main
class AppDelegate: UIResponder, UIApplicationDelegate {
    func application(
        _ application: UIApplication,
        didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?
    ) -> Bool {
        AF.request("https://api.example.com/health").response { response in
            print(response.result)
        }
        return true
    }
}

dependencies: [
    // Local path for development
    .package(path: "../NetworkKit"),
    
    // Remote URL for release
    // .package(url: "https://github.com/company/NetworkKit.git", from: "1.0.0")
]

# Initialize repository and push
git init
git add .
git commit -m "Initial commit"
git remote add origin https://github.com/username/NetworkKit.git
git push -u origin main

# Create version tag
git tag 1.0.0
git push origin 1.0.0

# Other packages can now depend on:
# .package(url: "https://github.com/username/NetworkKit.git", from: "1.0.0")

import PackageDescription

let package = Package(
    name: "SafeNetworkKit",
    platforms: [.iOS(.v17)],
    products: [
        .library(name: "SafeNetworkKit", targets: ["SafeNetworkKit"])
    ],
    targets: [
        .target(
            name: "SafeNetworkKit",
            swiftSettings: [
                // Enable Swift 6 language mode for this target only
                .swiftLanguageMode(.v6),
                // Enable strict memory safety checking (SE-0458)
                .enableExperimentalFeature("StrictMemorySafety"),
                // Set default actor isolation (SE-0466)
                .enableExperimentalFeature("GlobalActorIsolation")
            ]
        )
    ]
)

# Generate SBOM in CycloneDX format
swift build --sbom-spec cyclonedx

# Generate SBOM using dedicated subcommand
swift package generate-sbom --format spdx

# Output includes:
# - Package name and version
# - All transitive dependencies
# - License information
# - Source repository URLs

import PackageDescription

let package = Package(
    name: "AnalyticsSDK",
    platforms: [.iOS(.v14)],
    products: [
        .library(name: "AnalyticsSDK", targets: ["AnalyticsSDK"])
    ],
    targets: [
        .binaryTarget(
            name: "AnalyticsSDK",
            url: "https://releases.example.com/AnalyticsSDK-2.0.0.xcframework.zip",
            checksum: "abc123def456..."
        )
    ]
)

// Generate checksum:
// swift package compute-checksum AnalyticsSDK-2.0.0.xcframework.zip

// Module aliasing for name conflicts
.target(
    name: "MyApp",
    dependencies: [
        .product(name: "Logging", package: "swift-log", moduleAliases: ["Logging": "SwiftLogging"])
    ]
)

# Before: Podfile
pod 'Alamofire', '~> 5.9'
pod 'SwiftyJSON', '~> 5.0'
pod 'Kingfisher', '~> 7.0'

// After: Package dependencies in Xcode
// File > Add Package Dependencies for each:
// https://github.com/Alamofire/Alamofire.git from 5.9.0
// https://github.com/SwiftyJSON/SwiftyJSON.git from 5.0.0
// https://github.com/onevcat/Kingfisher.git from 7.0.0