• Stars
    star
    455
  • Rank 96,175 (Top 2 %)
  • Language
    Swift
  • License
    MIT License
  • Created over 2 years ago
  • Updated 14 days ago

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Repository Details

A new build tool to generate XCFramework

Scipio

⚠️ This project is currently under development. Please moment until a stable release. Of-course, feedbacks and pull requests are welcome.

Carthago delenda est

Scipio proposes a new workflow to integrate dependencies into your applications.

This product is highly inspired by Carthage and swift-create-xcframework.

Abstract

SwiftPM is the best way to integrate dependencies into your app. However, build artifacts built by Xcode are difficult to cache.

On the other hand, XCFramework is a good way to keep binaries portable.

Scipio provides a new hybrid way to manage dependencies.

First, use SwiftPM to resolve dependencies and checkout repositories. After that, this tool converts each dependency into XCFramework.

Usage

Prepare all dependencies for your application.

1. Create a new Swift Package to describe dependencies

$ cd path/to/MyAppDependencies
$ swift package init

2. Edit Package.swift to describe your application's dependencies

// swift-tools-version: 5.6
// The swift-tools-version declares the minimum version of Swift required to build this package.

import PackageDescription

let package = Package(
    name: "MyAppDependencies",
    platforms: [
        // Specify platforms to build
        .iOS(.v14),
    ],
    products: [],
    dependencies: [
        // Add dependencies
        .package(url: "https://github.com/onevcat/APNGKit.git", exact: "2.2.1"),
    ],
    targets: [
        .target(
            name: "MyAppDependency",
            dependencies: [
                // List all dependencies to build
                .product(name: "APNGKit", package: "APNGKit"),
            ]),
    ]
)

3. Run prepare command

$ scipio prepare path/to/MyAppDependencies
> 🔁 Resolving Dependencies...
> 🗑️ Cleaning MyAppDependencies...
> 📦 Building APNGKit for iOS
> 🚀 Combining into XCFramework...
> 📦 Building Delegate for iOS
> 🚀 Combining into XCFramework...
> ❇️ Succeeded.

All XCFrameworks are generated into MyAppDependencies/XCFramework by default.

Options

Flag Description Default
--configuration, -c Build configuration for generated frameworks (debug / release) release
--output, -o Path indicates a XCFrameworks output directory $PACKAGE_ROOT/XCFrameworks
--embed-debug-symbols Whether embed debug symbols to frameworks or not -
--static Whether generated frameworks are Static Frameworks or not -
--support-simulators Whether also building for simulators of each SDKs or not -
--cache-policy How to reuse built frameworks project
--disable-library-evolution Whether to enable Library Evolution feature or not -

See --help for details.

Library Evolution support

Scipio enables Library Evolution feature by default.

It means built frameworks always keep compatibility even if linked from products built in other Swift versions. (ABI stability)

However, as known, some packages doesn't support Library Evolution or there are issues to generate swiftinterface. (https://developer.apple.com/forums/thread/123253)

You can disable Library Evolution with --disable-library-evolution flag if you need.

Build cache

By default, Scipio checks whether re-building is required or not for existing XCFrameworks.

$ swift run scipio prepare --cache-policy project path/to/MyAppDependencies
> 🔁 Resolving Dependencies...
> 🗑️ Cleaning MyAppDependency...
> ✅ Valid APNGKit.xcframework is exists. Skip building.
> ✅ Valid Delegate.xcframework is exists. Skip building.
> ❇️ Succeeded.

Scipio generates VersionFile to describe built framework details within building XCFrameworks.

VersionFile contains the following information:

  • Revision
    • Revision of packages. If resolved versions are updated, they may change.
  • Build Options
    • Build options built with.
  • Compiler Version
    • Xcode or Swift compiler version.

They are stored on $OUTPUT_DIR/.$FRAMEWORK_NAME.version as a JSON file.

{
  "buildOptions" : {
    "buildConfiguration" : "release",
    "isDebugSymbolsEmbedded" : false,
    "frameworkType" : "dynamic",
    "sdks" : [
      "iOS"
    ],
    "isSimulatorSupported" : false
  },
  "targetName" : "APNGKit",
  "clangVersion" : "clang-1400.0.29.102",
  "pin" : {
    "version" : "2.2.1",
    "revision" : "f1807697d455b258cae7522b939372b4652437c1"
  }
}

If they are changed, Spicio regards them as a cache are invalid, and then it's re-built.

Cache Policy

You can specify cache behavior with --cache-policy option. Default value is project.

disabled

Never reuse already built frameworks. Overwrite existing frameworks everytime.

project(default)

VersionFiles are stored in output directories. Skip re-building when existing XCFramework is valid.

local

Copy every build artifacts to ~/Library/Caches. If there are same binaries are exists in cache directory, skip re-building and copy them to the output directory.

Thanks to this strategy, you can reuse built artifacts in past.

Create XCFramework for single Swift Packages

Scipio also can generate XCFrameworks from a specific Swift Package. This feature is similar to swift-create-xcframework.

$ scipio create path/to/MyPackage
> 🔁 Resolving Dependencies...
> 🗑️ Cleaning MyPackage...
> 📦 Building MyPackage for iOS
> 🚀 Combining into XCFramework...
> ❇️ Succeeded.

Reliability

Scipio only builts with standard dependencies and Apple official tools to keep reliability.

How to resolve dependencies

Just run swift package resolve.

How to parse package manifests and generate Xcode projects

Scipio depends on swift-package-manager as a library.

Parsing package manifests and generating Xcode project is provided from the package. So it will be maintained in the future.

How to build XCFrameworks

Scipio only uses xcodebuild to build Frameworks and XCFrameworks.

Why Scipio

Scipio names after a historical story about Carthage.

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