This GitHub Action installs and sets up of a Dart SDK for use in actions by:

• Downloading the Dart SDK
• Adding the dart command and pub cache to the system path

The action takes the following inputs:

• sdk: Which SDK version to setup. Can be specified using one of two forms:

  • A specific SDK version, e.g. 2.7.2 or 2.12.0-1.4.beta
  • A release channel, which will install the latest build from that channel. Available channels are stable, beta, dev, and main. See the Dart SDK archive for details.

• flavor: Which build flavor to setup.

  • Available build flavors are raw and release.
  • release flavor contains published builds.
  • raw flavor contains unpublished builds, which can be used by developers to test against SDK versions before a release.
  • main release channel only supports raw build flavor.

• architecture: The CPU architecture to setup support for. Valid options are x64, ia32, arm, and arm64. Note that not all CPU architectures are supported on all operating systems; see the Dart system requirements for valid combinations.

Install the latest stable SDK, and run Hello World.

name: Dart

on:
  push:
    branches: [ main ]
  pull_request:
    branches: [ main ]

jobs:
  build:
    runs-on: ubuntu-latest

    steps:
      - uses: actions/checkout@v3
      - uses: dart-lang/setup-dart@v1.3

      - name: Install dependencies
        run: dart pub get

      - name: Hello world
        run: dart run bin/hello_world.dart

Various static checks:

1. Check static analysis with the Dart analyzer
2. Check code follows Dart idiomatic formatting
3. Check that unit tests pass

...
    steps:

      - name: Install dependencies
        run: dart pub get

      - name: Verify formatting
        run: dart format --output=none --set-exit-if-changed .

      - name: Analyze project source
        run: dart analyze

      - name: Run tests
        run: dart test

You can create matrix jobs that run tests on multiple operating systems, and multiple versions of the Dart SDK.

The following example create a double matrix across two dimensions:

• All three major operating systems: Linux, macOS, and Windows.
• Five Dart SDKs: Latest stable, beta & dev plus two specific versions.

name: Dart

on:
  push:
    branches: [main]
  pull_request:
    branches: [main]

jobs:
  test:
    runs-on: ${{ matrix.os }}
    strategy:
      matrix:
        os: [ubuntu-latest, macos-latest, windows-latest]
        sdk: [stable, beta, dev, 2.10.3, 2.12.0-29.10.beta]
    steps:
      - uses: actions/checkout@v3
      - uses: dart-lang/setup-dart@v1.3
        with:
          sdk: ${{ matrix.sdk }}

      - name: Install dependencies
        run: dart pub get

      - name: Run tests
        run: dart test

The Dart SDK continuously evolves, and new features and tools are added. The Dart 2.10 SDK introduced a new unified dart developer tool, which is what we use in the usage examples above for installing dependencies, verifying formatting, analyzing, etc. If you need to test a combination of SDKs before and after Dart 2.10, we recommend splitting your test job as illustrated here:

jobs:
  test:
    runs-on: ${{ matrix.os }}
    strategy:
      matrix:
        os: [ubuntu-latest, macos-latest, windows-latest]
        sdk: [stable, beta, dev]
    steps:
      - uses: actions/checkout@v3
      - uses: dart-lang/setup-dart@v1.3
        with:
          sdk: ${{ matrix.sdk }}
      - name: Install dependencies
        run: dart pub get
      - name: Check formatting
        run: dart format --output=none --set-exit-if-changed .
      - name: Analyze code
        run: dart analyze
      - name: Run tests
        run: dart test

  test_old_sdks:
    runs-on: ${{ matrix.os }}
    strategy:
      matrix:
        os: [ubuntu-latest, macos-latest, windows-latest]
        sdk: [2.9.0, 2.8.1]
    steps:
      - uses: actions/checkout@v3
      - uses: dart-lang/setup-dart@v1.3
        with:
          sdk: ${{ matrix.sdk }}
      - name: Install dependencies
        run: pub get
      - name: Check formatting
        run: dartfmt --dry-run --set-exit-if-changed .
      - name: Analyze code
        run: dartanalyzer --fatal-warnings .
      - name: Run tests
        run: pub run test

• The install location of the Dart SDK is now available in an environment variable, DART_HOME (#43)

• Fixed an issue where cached downloads could lead to unzip issues on self-hosted runners (#35)

• Fixed a path issue impacting git dependencies on Windows.

• Added a flavor option setup.sh to allow downloading unpublished builds.

• Promoted to 1.0 stable.

• Fixed a Windows pub global activate path issue.

• Removed previously deprecated input channel. Use the sdk input instead.
• Added support for specifying the CPU architecture.

• Added support for installing SDKs from the main channel.

• Added support for installing a specific SDK version (e.g. 2.10.0).

• Initial version.

See the LICENSE file.