SwiftGit2

Swift bindings to libgit2.

let URL: URL = ...
let result = Repository.at(URL)
switch result {
case let .success(repo):
    let latestCommit = repo
        .HEAD()
        .flatMap {
            repo.commit($0.oid)
        }

    switch latestCommit {
    case let .success(commit):
        print("Latest Commit: \(commit.message) by \(commit.author.name)")

    case let .failure(error):
        print("Could not get commit: \(error)")
    }

case let .failure(error):
    print("Could not open repository: \(error)")
}

Design

SwiftGit2 uses value types wherever possible. That means using Swift’s structs and enums without holding references to libgit2 objects. This has a number of advantages:

1. Values can be used concurrently.
2. Consuming values won’t result in disk access.
3. Disk access can be contained to a smaller number of APIs.

This vastly simplifies the design of long-lived applications, which are the most common use case with Swift. Consequently, SwiftGit2 APIs don’t necessarily map 1-to-1 with libgit2 APIs.

All methods for reading from or writing to a repository are on SwiftGit’s only class: Repository. This highlights the failability and mutation of these methods, while freeing up all other instances to be immutable structs and enums.

Required Tools

To build SwiftGit2, you need to install libgit2 on your system.

on macOS

Make sure to have Homebrew installed, then run

brew install libgit2

on Linux

On Debian/Ubuntu-based distributions, run

apt install libgit2-dev

Adding SwiftGit2 to your Project

The easiest way to add SwiftGit2 to your project is to use SwiftPM. Simply add the following line to your Package.swift's dependencies:

.package(url: "https://github.com/SwiftGit2/SwiftGit2.git", .branch("master"))

Building SwiftGit2 Manually

If you want to build a copy of SwiftGit2, e.g. for development:

1. Clone SwiftGit2
2. Run swift build
3. Optionally run swift test to run the tests

Contributions

We ❤️ to receive pull requests! GitHub makes it easy:

1. Fork the repository
2. Create a branch with your changes
3. Send a Pull Request

All contributions should match GitHub’s Swift Style Guide.

License

SwiftGit2 is available under the MIT license.