Re: Statistics and completions

[Bart Schaefer <schaefer@xxxxxxxxxxxxxxxx>]

On Sat, Dec 5, 2020 at 5:22 AM A. Wik <awik32@xxxxxxxxx> wrote:
>
> I am wondering how hard it would be to implement the collection of
> statistics [...]
> to guide the priority of listed completions.

I would approach that as follows:

Require the zsh/db/gdbm module to be available (incidentally there is
a generic API for database modules if anybody wants to work on other
backends).

In the database, store a mapping from zstyle contexts to group-order
lists.  How to populate that mapping is up to you; it could probably
be updated via comppostfuncs.  I don't have any good ideas how to
prepopulate it from a history file (particularly if one uses
histignorealldups, as that would skew the frequencies).

At shell startup, evaluate a set of zstyle commands constructed from
the keys of the database, using "zstyle -e" to dynamically fetch the
latest value from the entry whenever the style is looked up.  One
generic style might be devised to create new keys for previously
unused contexts.