mxcl/xcodebuild

Make your software #continuously-resilient as well as continuously integrated.

This action will continue to work forever, no more CI breakage because Xcode is updated.

The action will build both Xcode projects and Swift packages.

Sponsor @mxcl

I can only afford to maintain projects I need or that are sponsored. Thanks.

Usage

For complete input/output documentation, see action.yml.

jobs:
  build:
    runs-on: macos-latest
    steps:
      - use: mxcl/xcodebuild@v1
      # ^^ this is the simplest use, runs tests for whatever platform `xcodebuild` picks

jobs:
  build:
    runs-on: macos-latest
    strategy:
      matrix:
        platform:
          - macOS
          - watchOS
          - tvOS
          - iOS
          - mac-catalyst
    steps:
      - use: mxcl/xcodebuild@v1
        with:
          platform: ${{ matrix.platform }}

jobs:
  build:
    strategy:
      matrix:
        platform:
          - macOS
          - watchOS
          - tvOS
          - iOS
        xcode:
          - ^10 # a semantic version range †
          - ^11
          - ^12
    runs-on: macos-10.15
    steps:
      - use: mxcl/xcodebuild@v1
        with:
          xcode: ${{ matrix.xcode }}
          platform: ${{ matrix.platform }}
          action: build # default = `test`
          code-coverage: true # default = `false`
          warnings-as-errors: true # default = `false`
          configuration: release # no default, ie. `xcodebuild` decides itself

† check out https://devhints.io/semver for valid ranges

jobs:
  build:
    runs-on: macos-11
    strategy:
      matrix:
        swift:
          - ~5.3
          - ~5.4
          - ^6
    steps:
      - use: mxcl/xcodebuild@v1
        with:
          swift: ${{ matrix.swift }}
          # ^^ mxcl/xcodebuild selects the newest Xcode that provides the requested Swift
          # obviously don’t specify an Xcode range *as well*
        continue-on-error: ${{ matrix.swift == '^6' }}
        # ^^ pre-emptively try to build against unreleased versions

If you need to test against Swift versions that cross macOS images then you will want something like this:

jobs:
  build:
    runs-on: ${{ matrix.os }}
    strategy:
      matrix:
        swift:
          - ~5.0 # Xcode 10.3
          - ~5.1 # Xcode 11.3.1
          - ~5.2 # Xcode 11.7
          - ~5.3 # Xcode 12.4
        os:
          - macos-10.15
        include:
          - swift: ~5.4 # Xcode 12.5.1
            os: macos-11
          - swift: ~5.5
            os: macos-11 # Xcode 13
    steps:
      - use: mxcl/xcodebuild@v1
        with:
          swift: ${{ matrix.swift }}

You can use this action to just select Xcode and perform no action:

jobs:
  build:
    runs-on: ${{ matrix.os }}
    steps:
      - use: mxcl/xcodebuild@v1
        with:
          action: none
      - run: … # do your own thing

Specifying scheme

You can specify scheme. If you don’t we try to figure it out for you; this sometimes fails.

Ideally if there is only one scheme you wouldn’t need to specify it, if you think we could have figured it out but didn’t please open a ticket.

Available Xcodes

GitHub’s images have a limited selection of Xcodes.

• GitHub list what is available for the current 10.15 image here.
• We run a scheduled workflow to determine what is available here.

To install other versions first use sinoru/actions-setup-xcode, then mxcl/xcodebuild will find that Xcode if you specify an appropriate value for the xcode input.

Logs

We automatically upload the build logs as artifacts on failure.

The resulting artifact is an .xcresult “bundle” and once downloaded can be opened in Xcode:

You’ll even get your coverage report!

Note this feature requires Xcode >= 11

.swift-version File

If your repo has a .swift-version file and neither swift nor xcode is specified it will be read and that Swift version resolved.

If working-directory is set, the .swift-version file is read from this directory.

This behavior cannot currently be disabled, PR welcome.

Code Signing

jobs:
  build:
    runs-on: macos-latest
    steps:
      - use: mxcl/xcodebuild@v1
        with:
          code-sign-certificate: ${{ secrets.CERTIFICATE_BASE64 }}
          code-sign-certificate-passphrase: ${{ secrets.CERTIFICATE_PASSPHRASE}}

This feature requires macOS.

A code signing certificate can be installed to the macOS Keychain. It is automatically removed from the Keychain in a post action.

To export your certificate from Xcode and Base64 encode it, follow these instructions. Store any secrets, including certificates and passphrases, in GitHub as Encrypted Secrets.

You may specify a code-sign-identity to override any CODE_SIGN_IDENTITY specified by your project.

To disable code signing, you can specify code-sign-identity: '-'.

Caveats

• The selected Xcode remains the default Xcode for the image for the duration of your job.

Neat Stuff

• We’re smart based on the selected Xcode version, for example we know watchOS cannot be tested prior to 12.5 and run xcodebuild with build instead
• We figure out the the simulator destination for you automatically. Stop specifying fragile strings like platform=iphonesimulator,os=14.5,name=iPhone 12 that will break when Xcode updates next week.
• You probably don’t need to specify project or scheme since we aren’t tedious if possible
• warnings-as-errors is only applied to normal targets: not your tests

Continuous Resilience

• Use macos-latest and trust this action to always work
  • This because GitHub deprecate old environments, so if you want your CI to continue to work in 5 years you need to use latest
  • This makes specifying specific xcode versions problematic however, we haven’t got a good story for this yet.
• Set up a scheduled job for your CI for at least once a week
  • This way you’ll be notified if a new version of something (like Xcode) causes breakage in your builds

Linux

If your project is a Swift Package (which it would have to be to build on Linux) then by far the best and quickest way to build on Linux is by using the official Swift docker containers:

jobs:
  build:
    runs-on: ubuntu-latest
    strategy:
      matrix:
        swift:
          - '5.0' # string or you’ll get 5.5!
          - 5.1
    container:
      image: swift:${{ matrix.swift }}
    steps:
      - run: swift test

This action does not support Linux.

Contributing

1. Run npm install
2. Edit the various .ts files
3. Run npm run prepare
4. Correct any lint issues with npm run format or in your editor
5. If there are lint failures, try
6. Create a Pull Request