- Determines the order in which pack library directories are searched.
Default is to add new packages at the end (
first, new packages are added at the start.
- Determines what happens if a pack with the same name is already
attached. Default is
warning, which prints a warning and ignores the new pack. Other options are
keep, which is like
warningbut operates silently and
replace, which detaches the old pack and attaches the new.
The predicate attach_packs/2 can be used to attach packages that are bundled with an application.