Allow execution of a pre-build command before testing a package on Windows

Author: ahoppen

.github/workflows/swift_package_test.yml

@@ -29,18 +29,22 @@ on:
         default: ""
       linux_build_command:
         type: string
-        description: "Linux Build command default is swift test"
+        description: "Linux command to build and test the package"
         default: "swift test"
+      windows_pre_build_command:
+        type: string
+        description: "Windows Command Prompt command to execute before building the Swift package"
+        default: ""
       windows_build_command:
         type: string
-        description: "Linux Build command default is swift test"
+        description: "Windows Command Prompt command to build and test the package"
         default: "swift test"
       linux_env_vars:
         description: "List of environment variables"
         type: string
       enable_windows_checks:
         type: boolean
-        description: "Boolean to enable windows testing. Defaults to true."
+        description: "Boolean to enable windows testing. Defaults to true"
         default: true
 
 jobs:
@@ -84,13 +88,27 @@ jobs:
         exclude:
           - ${{ fromJson(inputs.windows_exclude_swift_versions) }}
     steps:
-      - name: Pull Docker image
-        run: docker pull swift:${{ matrix.swift_version }}-windowsservercore-ltsc2022
       - name: Checkout repository
         uses: actions/checkout@v4
+      - name: Pull Docker image
+        run: docker pull swift:${{ matrix.swift_version }}-windowsservercore-ltsc2022
+      - name: Create test script
+        run: |
+          mkdir $env:TEMP\test-script
+          echo @'
+          Set-PSDebug -Trace 1
+          $ErrorActionPreference = "Stop"
+          ${{ inputs.windows_pre_build_command }}
+          '@ >> $env:TEMP\test-script\pre-build.ps1
+
+          echo 'swift --version || (exit /b 1)' >> $env:TEMP\test-script\run.cmd
+          echo 'swift test --version || (exit /b 1)' >> $env:TEMP\test-script\run.cmd
+          echo 'cd C:\source\ || (exit /b 1)' >> $env:TEMP\test-script\run.cmd
+          echo 'powershell.exe -NoLogo -File C:\test-script\pre-build.ps1 || (exit /b 1)' >> $env:TEMP\test-script\run.cmd
+          echo '${{ inputs.windows_build_command }} ${{  inputs.swift_flags }} || (exit /b 1)' >> $env:TEMP\test-script\run.cmd
       - name: Build / Test
         timeout-minutes: 60
-        run: docker run -v ${{ github.workspace }}:C:\source swift:${{ matrix.swift_version }}-windowsservercore-ltsc2022 cmd /s /c  "swift --version & swift test --version & cd C:\source\ & ${{ inputs.windows_build_command }} ${{  inputs.swift_flags }}"
+        run: docker run -v ${{ github.workspace }}:C:\source -v $env:TEMP\test-script:C:\test-script swift:${{ matrix.swift_version }}-windowsservercore-ltsc2022 C:\test-script\run.cmd
 
   windows-nightly-build:
     name: Windows (${{ matrix.swift_version }} - windows-2019)