Don't remove packagesFolder if it already exists (#3910)

If compilefolders are used the packages folder will be deleted and
recreated during the pipeline run.

In certain cases especially when you use customized AL:Go with foreign
container systems, this folder exists on purpose and already includes
files. This files should not be deleted because it will lead the
pipeline to fail

Author: PatrickSchiefer

AppHandling/Run-AlPipeline.ps1

@@ -875,10 +875,12 @@ if ($updateLaunchJson) {
 
 if ($useCompilerFolder -or $filesOnly -or !$useDevEndpoint) {
     $packagesFolder = CheckRelativePath -baseFolder $baseFolder -sharedFolder $sharedFolder -path $packagesFolder -name "packagesFolder"
-    if (Test-Path $packagesFolder) {
-        Remove-Item $packagesFolder -Recurse -Force
+    if (!($bcContainerHelperConfig.doNotRemovePackagesFolderIfExists)) {
+        if (Test-Path $packagesFolder) {
+            Remove-Item $packagesFolder -Recurse -Force
+        }
     }
-    New-Item $packagesFolder -ItemType Directory | Out-Null
+    New-Item $packagesFolder -ItemType Directory -Force | Out-Null 
 }
 
 if ($useDevEndpoint) {

BC.HelperFunctions.ps1

@@ -122,6 +122,7 @@ function Get-ContainerHelperConfig {
             "useApproximateVersion" = $false
             "useSqlServerModule" = $false
             "NuGetSearchResultsCacheRetentionPeriod" = 600 # 10 minutes
+            "doNotRemovePackagesFolderIfExists" = $false
         }
 
         if ($isInsider) {

ReleaseNotes.txt

@@ -9,6 +9,7 @@ Fixes issues determining test symbols for W1 and OnPrem artifacts not containing
 Add cache for search results of a NuGet feed
 Add new setting NuGetSearchResultsCacheRetentionPeriod (default: 600) to set the retention period (in seconds) for the search result cache of NuGet feeds (0 to disable the cache)
 Download-BcNuGetPackageToFolder checks all direct dependency versions of a package based on the NuSpec before downloading the whole package and its dependencies
+New Option doNotRemovePackagesFolderIfExists to prevent Run-ALPipeline from deleting the packages folder, if it already exists. Default is false
 Add support for Windows 2025 Containers
 
 6.1.3