Try use ErrorActionPreference instead of Invoke-Program

Author: bnbarham

.github/workflows/swift_package_test.yml

@@ -97,10 +97,7 @@ on:
         default: ""
       windows_build_command:
         type: string
-        description: |
-          Windows Command Prompt command to build and test the package.
-          Note that Powershell does not automatically exit if a subcommand fails. The Invoke-Program utility is available to propagate non-zero exit codes.
-          It is strongly encouraged to run all command using `Invoke-Program` unless you want to continue on error eg. `Invoke-Program git apply patch.diff` instead of `git apply patch.diff`.
+        description: "Windows Command Prompt command to build and test the package"
         default: "swift test"
       macos_env_vars:
         description: "Newline separated list of environment variables"
@@ -386,6 +383,8 @@ jobs:
           mkdir $env:TEMP\test-script
           echo @'
           Set-PSDebug -Trace 1
+          $ErrorActionPreference = 'Stop'
+
           if ("${{ inputs.enable_windows_docker }}" -eq "true") {
             $Source = "C:\source"
           } else {
@@ -400,11 +399,12 @@ jobs:
               exit $LastExitCode
             }
           }
-          Invoke-Program swift --version
-          Invoke-Program swift test --version
-          Invoke-Program cd $Source
+
+          swift --version
+          swift test --version
+          cd $Source
           ${{ inputs.windows_pre_build_command }}
-          Invoke-Program ${{ inputs.windows_build_command }} ${{ (contains(matrix.swift_version, 'nightly') && inputs.swift_nightly_flags) || inputs.swift_flags }}
+          ${{ inputs.windows_build_command }} ${{ (contains(matrix.swift_version, 'nightly') && inputs.swift_nightly_flags) || inputs.swift_flags }}
           '@ >> $env:TEMP\test-script\run.ps1
       # Docker build
       - name: Docker Build / Test