Generalise the finding of sets of files

inc/filetools.ps1

@@ -0,0 +1,25 @@
+function Find-File-Set {
+    param (
+        [string]$startDir,
+        [string]$pattern,
+        [bool]$includeByDefault,
+        [array]$includeBaseNames,
+        [array]$excludeBaseNames
+    )
+
+    $set = [System.Collections.Generic.HashSet[string]]::New()
+    Get-ChildItem -Path $startDir -Filter $pattern -Recurse | ForEach-Object { 
+        if ($includeByDefault) {
+            if ($excludeBaseNames -notcontains $_.BaseName) {
+                $set.Add($_.BaseName) > $null 
+            }
+        } else {
+            if ($includeBaseNames -contains $_.BaseName) {
+                $set.Add($_.BaseName) > $null
+            }
+        }
+    }
+
+    return $set
+
+}

ue4-package.ps1

@@ -28,6 +28,7 @@ param (
 . $PSScriptRoot\inc\uproject.ps1
 . $PSScriptRoot\inc\ueinstall.ps1
 . $PSScriptRoot\inc\ueeditor.ps1
+. $PSScriptRoot\inc\filetools.ps1
 
 
 function Write-Usage {
@@ -139,16 +140,7 @@ try {
         Write-Warning "Unknown variant(s) ignored: $($unmatchedVariants -join ", ")"
     }
 
-    $maps = [System.Collections.Generic.HashSet[string]]::New()
+    $maps = Find-File-Set -startDir:$(Join-Path $src "Content") -pattern:*.umap -includeByDefault:$config.CookAllMaps -includeBaseNames:$config.MapsIncluded -excludeBaseNames:$config.MapsExcluded
-    if ($config.CookAllMaps) {
-        Get-ChildItem -Path $(Join-Path $src "Content") -Filter *.umap -Recurse | ForEach-Object { 
-            if ($config.MapsExcluded -notcontains $_.BaseName) {
-                $maps.Add($_.BaseName) 
-            }
-        }
-    } elseif ($config.MapsIncluded) {
-        $config.MapsIncluded | ForEach-Object { $maps.Add($_) }
-    }
 
     Write-Output ""
     Write-Output "Project File    : $projfile"