resolves #343 properly check process exit codes in install-prerequisi…

…tes.ps1

src/ue4docker/dockerfiles/ue4-build-prerequisites/windows/install-prerequisites.ps1

@@ -1,5 +1,18 @@
 $ErrorActionPreference = "stop"
 
+function RunProcessChecked
+{
+    param ([string] $Cmd, [string[]] $Argv)
+
+    Write-Output "Executing comand: $Cmd $Argv"
+
+    $process = Start-Process -NoNewWindow -PassThru -Wait -FilePath $Cmd -ArgumentList $Argv
+    if ($process.ExitCode -ne 0)
+    {
+        throw "Exit code: $($process.ExitCode)"
+    }
+}
+
 # TODO: Why `Update-SessionEnvironment` doesn't Just Work without this?
 # Taken from https://stackoverflow.com/a/46760714
 # Make `Update-SessionEnvironment` available right away, by defining the $env:ChocolateyInstall
@@ -8,25 +21,25 @@ $env:ChocolateyInstall = Convert-Path "$( (Get-Command choco).Path )\..\.."
 Import-Module "$env:ChocolateyInstall\helpers\chocolateyProfile.psm1"
 
 # Install the chocolatey packages we need
-choco install --no-progress -y git --params "'/GitOnlyOnPath /NoAutoCrlf /WindowsTerminal /NoShellIntegration /NoCredentialManager'"
+RunProcessChecked "choco" @("install", "--no-progress", "-y", "git", "--params", "/GitOnlyOnPath /NoAutoCrlf /WindowsTerminal /NoShellIntegration /NoCredentialManager")
 
 # pdbcopy.exe from Windows SDK is needed for creating an Installed Build of the Engine
-choco install --no-progress -y choco-cleaner python vcredist-all windows-sdk-10-version-1809-windbg
+RunProcessChecked "choco" @("install", "--no-progress", "-y", "choco-cleaner", "python", "vcredist-all", "windows-sdk-10-version-1809-windbg")
 
 # Reload our environment variables from the registry so the `git` command works
 Update-SessionEnvironment
 
 # Forcibly disable the git credential manager
-git config --system credential.helper ""
+RunProcessChecked "git" @("config", "--system", "credential.helper", "")
 
 # Gather the required DirectX runtime files, since Windows Server Core does not include them
 Invoke-WebRequest -Uri "https://download.microsoft.com/download/8/4/A/84A35BF1-DAFE-4AE8-82AF-AD2AE20B6B14/directx_Jun2010_redist.exe" -OutFile "$env:TEMP\directx_redist.exe"
-Start-Process -FilePath "$env:TEMP\directx_redist.exe" -ArgumentList "/Q", "/T:$env:TEMP" -Wait
-expand "$env:TEMP\APR2007_xinput_x64.cab" -F:xinput1_3.dll C:\Windows\System32\
-expand "$env:TEMP\Jun2010_D3DCompiler_43_x64.cab" -F:D3DCompiler_43.dll C:\Windows\System32\
-expand "$env:TEMP\Feb2010_X3DAudio_x64.cab" -F:X3DAudio1_7.dll C:\Windows\System32\
-expand "$env:TEMP\Jun2010_XAudio_x64.cab" -F:XAPOFX1_5.dll C:\Windows\System32\
-expand "$env:TEMP\Jun2010_XAudio_x64.cab" -F:XAudio2_7.dll C:\Windows\System32\
+RunProcessChecked "$env:TEMP\directx_redist.exe", @("/Q", "/T:$env:TEMP")
+RunProcessChecked "expand" @("$env:TEMP\APR2007_xinput_x64.cab", "-F:xinput1_3.dll", "C:\Windows\System32\")
+RunProcessChecked "expand" @("$env:TEMP\Jun2010_D3DCompiler_43_x64.cab", "-F:D3DCompiler_43.dll", "C:\Windows\System32\")
+RunProcessChecked "expand" @("$env:TEMP\Feb2010_X3DAudio_x64.cab", "-F:X3DAudio1_7.dll", "C:\Windows\System32\")
+RunProcessChecked "expand" @("$env:TEMP\Jun2010_XAudio_x64.cab", "-F:XAPOFX1_5.dll", "C:\Windows\System32\")
+RunProcessChecked "expand" @("$env:TEMP\Jun2010_XAudio_x64.cab", "-F:XAudio2_7.dll", "C:\Windows\System32\")
 
 # Retrieve the DirectX shader compiler files needed for DirectX Raytracing (DXR)
 Invoke-WebRequest -Uri "https://github.com/microsoft/DirectXShaderCompiler/releases/download/v1.6.2104/dxc_2021_04-20.zip" -OutFile "$env:TEMP\dxc.zip"
@@ -97,7 +110,7 @@ $vs_args = @(
 )
 
 # Install the Visual Studio Build Tools workloads and components we need
-Start-Process -FilePath "$env:TEMP\vs_buildtools.exe" -ArgumentList $vs_args -Wait
+RunProcessChecked "$env:TEMP\vs_buildtools.exe" $vs_args
 
 # NOTE: Install the .Net 4.5 Framework Pack via NuGet as it is no longer available via Visual Studio, but still needed
 # NOTE: some programs even in UE5, for example https://github.com/EpicGames/UnrealEngine/blob/5.0.1-release/Engine/Source/Programs/UnrealSwarm/SwarmCoordinator/SwarmCoordinator.csproj#L26
@@ -110,7 +123,7 @@ Remove-Item -LiteralPath "$env:TEMP" -Recurse -Force
 New-Item -Type directory -Path "$env:TEMP"
 
 # This shaves off ~300MB as of 2021-08-31
-choco-cleaner
+RunProcessChecked "choco-cleaner", @()
 
 # Something that gets installed in ue4-build-prerequisites creates a bogus NuGet config file
 # Just remove it, so a proper one will be generated on next NuGet run