LPS-31543 Renamed to make more clear. plugin.dir is the location of the plugin (../foo/test-portlet), plugin.parent.dir is immediate directory above (../foo), plugin.common.dir is the base directory of the plugin type (../liferay-plugins/portlets). The parent.dir and common.dir values are the same if the plugin is in the standard location (../liferay-plugins/portlets/test-portlet)