GitHub Actions' Workflow for Swift Package.

swift-package-ci.yml

name: CI
on:
  push:
    branches:
      - '**'
    tags-ignore:
      - '**'
    paths:
      - '**/*.swift'
      - '**/*.c'
      - '**/*.h'
      - '.github/workflows/*.yml'
  pull_request:
    paths:
      - '**/*.swift'
      - '**/*.c'
      - '**/*.h'
      - '.github/workflows/*.yml'
jobs:
  test:
    defaults:
      run:
        working-directory: '.'
    strategy:
      matrix:
        os:
          - ubuntu-24.04
          - macOS-26
        swift-version:
          - '6.2.1'
          - '6.1.3'
          - '6.0.3'
        swift-compat-ver:
          - '6'
          - '5'
          - '4.2'
          - '4'
        exclude:
          - os: macOS-26
            swift-version: '6.1.3'
          - os: macOS-26
            swift-version: '6.0.3'
    runs-on: ${{ matrix.os }}
    steps:
    - uses: actions/checkout@v4
    - name: Use a cache for ".build" directory.
      uses: actions/cache@v4
      with:
        path: .build
        key: build-${{ github.workspace }}-${{ runner.os }}-${{ matrix.os }}-${{ matrix.swift-version }}-${{ matrix.swift-compat-ver }}-${{ hashFiles('**/*.swift') }}
        restore-keys: |
          build-${{ github.workspace }}-${{ runner.os }}-${{ matrix.os }}-${{ matrix.swift-version }}-${{ matrix.swift-compat-ver }}-
          build-${{ github.workspace }}-${{ runner.os }}-${{ matrix.os }}-${{ matrix.swift-version }}-
          build-${{ github.workspace }}-${{ runner.os }}-${{ matrix.os }}-
          build-${{ github.workspace }}-${{ runner.os }}-
          build-${{ github.workspace }}-
    - uses: YOCKOW/Action-setup-swift@main
      with:
        swift-version: ${{ matrix.swift-version }}
    ## NEEDS WORKAROUND FOR https://github.com/swiftlang/swift-package-manager/issues/8064
    # DEBUG mode
    - name: Build with debug mode.
      id: debug_build
      run: swift build --configuration debug -Xswiftc -swift-version -Xswiftc ${{ matrix.swift-compat-ver }}
      continue-on-error: true
    - name: Retry build with debug mode if necessary
      if: steps.debug_build.outcome == 'failure'
      run: swift build --configuration debug -Xswiftc -swift-version -Xswiftc ${{ matrix.swift-compat-ver }}
      continue-on-error: true
    - name: Test with debug mode.
      id: debug_test
      run: swift test --configuration debug -Xswiftc -swift-version -Xswiftc ${{ matrix.swift-compat-ver }}
      continue-on-error: true
    - name: Retry test with debug mode if necessary
      if: steps.debug_test.outcome == 'failure'
      run: |
        rm -rf $(cd .build/debug && pwd -P)
        swift test --configuration debug -Xswiftc -swift-version -Xswiftc ${{ matrix.swift-compat-ver }}
    # RELEASE mode
    - name: Build with release mode.
      id: release_build
      run: swift build --configuration release -Xswiftc -enable-testing -Xswiftc -swift-version -Xswiftc ${{ matrix.swift-compat-ver }}
      continue-on-error: true
    - name: Retry build with release mode if necessary
      if: steps.release_build.outcome == 'failure'
      run: swift build --configuration release -Xswiftc -enable-testing -Xswiftc -swift-version -Xswiftc ${{ matrix.swift-compat-ver }}
      continue-on-error: true
    - name: Test with release mode.
      id: release_test
      run: swift test --configuration release -Xswiftc -enable-testing -Xswiftc -swift-version -Xswiftc ${{ matrix.swift-compat-ver }}
      continue-on-error: true
    - name: Retry test with release mode if necessary
      if: steps.release_test.outcome == 'failure'
      run: |
        rm -rf $(cd .build/release && pwd -P)
        swift test --configuration release -Xswiftc -swift-version -Xswiftc ${{ matrix.swift-compat-ver }}