callback used to extract download information into mod info.
This also gets called a lot when displaying uninstalled mods in the mod list
(the modPath is going to be undefined) so when that flag is set, the extractor should
not be accessing the disk or network or do any complex coomputation
callback used to extract download information into mod info. This also gets called a lot when displaying uninstalled mods in the mod list (the modPath is going to be undefined) so when that flag is set, the extractor should not be accessing the disk or network or do any complex coomputation