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Subject: Re: [External] : Re: [NonGNU ELPA] Package suggestion: yeetube
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Thanos Apollo <public@thanosapollo.com> writes:

> Drew Adams <drew.adams@oracle.com> writes:
>
>> How old?  Emacs 20?  What minimal version
>> does that package itself require?  Does
>> it, itself, need some compat support...?

Emacs 24.4 is the current minimum version.  This is currently the oldest
version that one can reasonably support without running into too many
edge-cases that are beyond the scope of the library, while also being
distributed in most supported, popular distributions.

> Philip will give you a more concrete answer, but according to the
> documentation:
>
> ```
> Requires: ((emacs "24.4") (compat "29.1.4.2"))
>
>   There is no need to depend on =E2=80=98emacs 24.4=E2=80=99 specifically=
.  One    can
> choose any newer version, if features not provided by Compat
> necessitate
> it, for example bug fixes or UI improvements.
>
>   In any file where compatibility forms are used, a
>
>     (require 'compat)
>
>   should be added early on.  In packages which are part of Emacs
>   itself
> and which want to take advantage of Compat, the =E2=80=98noerror=E2=80=99=
 flag should
> be
> specified: =E2=80=98(require 'compat nil 'noerror)=E2=80=99.  In the futu=
re a minimal
> version of Compat may be added to the Emacs core, such that the
> =E2=80=98noerror=E2=80=99 flag will not be necessary anymore.
> ```
>
> Not sure, but maybe something like this is a valid use case?
>
> ``` emacs-lisp
> (compat-call defvar-keymap yeetube-mode-map
> 	     :doc "Keymap for yeetube commands"
> 	     "RET" #'yeetube-play
>             ...

There is no need to use compat-call, if the function/macro was
introduced in a more recent version than the minimum version of Emacs
you wish to support.  In other words, the point of `compat-call' is to
ensure the compatibility version of function is used, where the
signature was updated at some point (e.g. IIRC in Emacs 26.1 `assoc'
gained an optional TESTFN argument), but to avoid the complexity of
advising the default function with an updated signature, the API of
Compat allows/requires for developers to opt-in to new signatures.

> ```             -- Thanos Apollo
> https://thanosapollo.com