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Re: elpa.gnu.org packages requiring external packages

From: Eric Abrahamsen
Subject: Re: elpa.gnu.org packages requiring external packages
Date: Fri, 02 Feb 2018 16:43:38 -0800
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (gnu/linux)

Stefan Monnier <address@hidden> writes:

>>> AFAICT the pinyin table is only kept in the quail table: quail tables
>>> are somewhat similar to keymaps, so they work well to incrementally map
>>> a sequence of ASCII chars to the possible chinese characters, but for
>>> pyim-hanzi2pinyin we'll need to traverse this table to build a "reverse
>>> table" (most likely represented as a char-table).
>> Okay, I'll take a look.
> Thanks.  I played a bit with quail tables in the past, so even though
> I don't understand them 100% I should be able to help if needed.

By dint of heroic grepping I found the simplest entrypoint to the

(nth 2 (quail-package "chinese-py"))

But this value is already heavily processed in the *wrong* direction
(optimized for pinyin-to-character). It's built from the intermediate
file "lisp/leim/quail/PY.el", which is produced during `make' from
"leim/MISC-DIC/pinyin.map", which is the same source as Feng Shu uses
for the pyim package.

So the data is accessible in different formats at different stages:
build, compile, and load. Now I'm thinking that it might make sense to
build the reverse table earlier on -- anyway, I'll explore what's
possible there.


>>> I think it makes a lot of sense to fold helm-ebdb into the ebdb package,
>>> without adding `helm` as a dependency.  This way, users of Helm and EBDB
>>> won't have to additionally install helm-ebdb to enjoy the combination of
>>> the two: just by installing `ebdb` and `helm` they'll get `helm-ebdb`.
>> Oh I'm all in favor, but I assumed it would be a no-no from a
>> dependency-graph point of view.
> Not at all (actually, back when we got EBDB into elpa.git I mentioned
> this possibility).

Wish I'd been paying closer attention!

>> If it doesn't matter, I can fold this back into ebdb and just use
>> `declare-function' with "ext:" to quiet the compiler?
> Yes.
>> In which case, I might as well just do the same for
>> `helm-marked-candidates' and leave it as-is?
> Yes.
>> I've also got these other silly little packages -- counsel-ebdb,
>> company-ebdb -- etc, should those all be reabsorbed? There are an awful
>> lot of counsel-* packages in there already.
> I don't have an opinion on counsel-ebdb, but for company-ebdb an even
> better option is to turn the company backend into
> a completion-at-point-function (so it works not only for company users
> but also for old-style TAB-completion users).

company primarily does popup-on-a-timer; I think calling it as an
explicit completion command (while supported) isn't how it's expected to
be used.

>> Sorry, I'm just trying to figure out best policy for managing this kind
>> of stuff.
> And overall, I really wish someone could sit down, take the ivy,
> company, helm, and completion-at-point-function APIs and design a new
> API which can be used by all of those UIs so you don't have to implement
> N different slight variations of the same thing.

But they do their things in such different ways. Some work on a timer
with a popup (company), others tie into the existing completion
mechanisms (helm and ivy), and others provide their own versions of
basic Emacs commands (helm and counsel). How much unification is


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