[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: Strange requirement...
From: |
David Kastrup |
Subject: |
Re: Strange requirement... |
Date: |
Tue, 25 Jul 2006 09:29:19 +0200 |
User-agent: |
Gnus/5.11 (Gnus v5.11) Emacs/22.0.50 (gnu/linux) |
Richard Stallman <address@hidden> writes:
> This gives, however, no clue about how to deal with declaring versions
> of an external package that is _not_ distributed as part of Emacs
> (notably AUCTeX).
>
> You just follow the instructions for :package-version.
> They seem clear to me. If you don't find them clear,
> could you explain why?
The last sentence of the :package-version description states:
Packages that use the `:package-version' keyword must also update
the `customize-package-emacs-version-alist' variable.
And the immediately following description states:
-- Variable: customize-package-emacs-version-alist
This alist provides a mapping for the versions of Emacs that are
associated with versions of a package listed in the
`:package-version' keyword. Its elements look like this:
(PACKAGE (PVERSION . EVERSION)...)
For each PACKAGE, which is a symbol, there are one or more
elements that contain a package version PVERSION with an
associated Emacs version EVERSION.
But for an external package, there is no associated Emacs version, so
there is no point or sense in updating
`customize-package-emacs-version-alist'.
So I think that the last sentence in the :package-version description
should be something like:
Packages that use the `:package-version' keyword with versions that
have been distributed as part of Emacs must also update the
`customize-package-emacs-version-alist' variable.
For example, the MH-E package updates this alist with the
following:
(add-to-list 'customize-package-emacs-version-alist
'(MH-E ("6.0" . "22.1") ("6.1" . "22.1") ("7.0" . "22.1")
("7.1" . "22.1") ("7.2" . "22.1") ("7.3" . "22.1")
("7.4" . "22.1") ("8.0" . "22.1")))
And the passage before should probably be something like:
`:package-version '(PACKAGE . VERSION)'
This option specifies that the item was first introduced in
PACKAGE version VERSION, or that its default value was changed in
that version. This keyword takes priority over :version. The
value of PACKAGE is a symbol and VERSION is a string. If any
VERSION of PACKAGE has been distributed as part of Emacs, the
combination of PACKAGE and VERSION must appear in the alist
`customize-package-emacs-version-alist'. Since PACKAGE must be
unique and the user might see it in an error message, a good choice
is the official name of the package, such as MH-E or Gnus.
Note that this is just my _guess_ as how to treat this sensibly. I
don't know whether the actual code will complain if it can't find a
given package and version in `customize-package-emacs-version-alist'.
If it does, I think it should likely be changed to match the behavior
I described. But as it stands, the instructions for :package-version
can't be heeded for packages not distributed as part of Emacs.
--
David Kastrup, Kriemhildstr. 15, 44793 Bochum