Swim is a simple build system for Swift. Swim allows you to build and test your Swift code.

• swim is compatible with multiple versions of Swift (2.x, 3.x, etc)
• swim allows you to test your Swift project with third-party testing frameworks such as Spectre and Ploughman.
• swim is compatible with common Swift Package Manager libraries.
• swim is easy to install (does not depend on Swift)

The Swift Package Manager has great potential, however right now it is missing the ability to use third-party testing libraries along with working easily on multiple versions of Swift like Swift 2.2.

$ pip install swim

You can use swim to build your project, providing the source is in Sources/ and test files are in Tests. You may define your dependencies in Package.swift exactly like you would for the Swift Package Manager.

$ swim build

You can integrate swim with any testing library of your choice, you will need to create a main.swift file inside Tests which runs your tests.

$ swim test

import Spectre


describe("a string") {
  $0.it("can be compared to another string") {
    try expect("Kyle") == "Kyle"
  }
}

swim is mostly compatible with the Swift Package Manager, however many features are missing. swim doesn't aim to be a complete drop-in replacement for Swift Package Manager and only supports a subset of features. This covers most common features.

Current known limitations:

• Only Swift sources are supported.
• Dependencies are not locked to versions you specify in your Package.swift file.
• Only one level of source files.
• You may only define name, dependencies and testDependencies in Package.swift files.

Pull requests are highly welcome.

You can use swim on Travis CI to test against multiple versions of Swift, on multiple platforms.

install:
- if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then sudo python -m ensurepip; fi
- sudo pip install swim

It works great on conjunction with swiftenv.

os:
  - linux
  - osx
env:
  - SWIFT_VERSION=2.2
  - SWIFT_VERSION=3.0-preview-1-SNAPSHOT-2016-05-31-a
language: generic
sudo: required
dist: trusty
osx_image: xcode7.3
install:
  - eval "$(curl -sL https://gist.githubusercontent.com/kylef/5c0475ff02b7c7671d2a/raw/9f442512a46d7a2af7b850d65a7e9bd31edfb09b/swiftenv-install.sh)"
  - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then sudo python -m ensurepip; fi
  - sudo pip install swim
script:
  - swim test