AdditionalPluginDirectories: Cooking a plugin as DLC stores files in the wrong location and fails to correctly stage

A project can add paths in AdditionalProjectDirectories to specify directories other than <UERoot>\Engine\Plugins or <ProjectRoot>\Plugins that contain plugins.

But when adding a plugin in one of these directories and attempting to cook it as a DLC, it fails and creates an empty pak that will fail at runtime. The cooker is putting the files in the wrong location.

It is supposed to write them to <PluginRoot>\Saved\Cooked\<Platform>\RemappedPlugins, but it is instead writing them to <PlutinRoot>\Saved\Cooked\<Platform>\<RelativePathToPluginFromProjectRoot>

• Open EngineTestEditor.
• LevelEditor MenuRibbon -> Platforms -> ProjectLauncher
  • Add a Custom Launch Profile for the base game
    • In Custom Launch Profiles panel, click button labeled +Add, select Create Custom Profile
    • Name -> EngineTestBaseForAddPluginDirDLC
    • Project -> EngineTest
    • Build -> Development
    • Cook -> By The Book
    • Cook/Cook Platforms -> Windows
    • Cook/ReleaseDLCPatchingSettings/Create a release version of the game for distribution -> true
    • Cook/ReleaseDLCPatchingSettings/Name of the new release to create -> AdditionalPlugins1
    • All other Cook options stay at default
    • Package -> Package & store locally
    • All other Package options stay at default
    • Archive options stay at default
    • Deploy -> Do not Deploy
    • Click Back to Save
  • Add a Custom Launch Profile for the AddPluginDirDLC plugin cooked as DLC
    • In Custom Launch Profiles panel, click button labeled +Add, select Create Custom Profile
    • Name -> EngineTestAddPluginDirDLC
    • Project -> EngineTest
    • Build -> Development
    • Cook -> By The Book
    • Cook/Cook Platforms -> Windows
    • Cook/ReleaseDLCPatchingSettings/Release Version this is based on -> AdditionalPlugins1
    • Cook/ReleaseDLCPatchingSettings/Build DLC -> true
    • Cook/ReleaseDLCPatchingSettings/Name of the DLC to build -> AddPluginDirDLC
    • All other Cook options stay at default
    • Package -> Package & store locally
    • All other Package options stay at default
    • Archive options stay at default
    • Deploy -> Do not Deploy
    • Click Back to Save
  • Execute the EngineTestBaseForAddPluginDirDLC, wait for it to complete
  • Execute the EngineTestAddPluginDirDLC, wait for it to complete
• Cooked .uasset and .umap files should be present at EngineTest\Test\AdditionalPlugins\AddPluginDirDLC\Saved\Cooked\Windows\RemappedPlugins\AddPluginDirDLC\Content, but the directory contains only .ushaderbytecode files
• The files were instead incorrectly stored at D:\root1\EngineTest\Test\AdditionalPlugins\AddPluginDirDLC\Saved\Cooked\Windows\EngineTest\Test\AdditionalPlugins\AddPluginDirDLC\Content