Extending 'gnus-parameters usage

Extending 'gnus-parameters usage

[Daniel Dehennin]

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Hello,

For some times now I use a hack to make the content of 'gnus-parameters
variable used by 'gnus-group-split-fancy.

I think it's dirty, I post here to propose the idea and hope for a clean
solution.

I do not like the group parameter customization from the group buffer,
I maintain my configuration in a git repository and would like to follow
any changes to my groups configuration.

So I define a 'my-gnus-group-split-prepare-parameters function to merge
'gnus-parameters and 'newsrc-alist.

#+begin_src emacs-lisp
(defun my-gnus-group-split-prepare-parameters (&optional parameters)
  "Take the ALIST of parameters or gnus-parameters and create a
fake newsrc structure to use in gnus-group-split-fancy"
  (let ((group-params (if parameters
			  parameters
			gnus-parameters))
	newsrc-alist)
    (dolist (param-assoc group-params newsrc-alist)
      (let ((group (car param-assoc))
	    (param (cdr param-assoc)))
	;; FIXME any better solution than (list (list ?
	(setq newsrc-alist 
	      (append newsrc-alist (list (list group nil nil nil nil param))))))))
#+end_src

Then I patched 'gnus-group-split-fancy:

#+begin_src diff
diff --git a/lisp/gnus-mlspl.el b/lisp/gnus-mlspl.el
index 3086e2b..b59e841 100644
--- a/lisp/gnus-mlspl.el
+++ b/lisp/gnus-mlspl.el
@@ -97,7 +97,8 @@ See `gnus-group-split-fancy' for more information.
 ;;;###autoload
 (defun gnus-group-split-fancy
   (&optional groups no-crosspost catch-all)
-  "Uses information from group parameters in order to split mail.
+  "Uses information from group parameters and gnus-parameters 
+in order to split mail.
 It can be embedded into `nnmail-split-fancy' lists with the SPLIT
 
 \(: gnus-group-split-fancy GROUPS NO-CROSSPOST CATCH-ALL\)
@@ -146,7 +147,7 @@ Calling (gnus-group-split-fancy nil nil \"mail.others\") returns:
       (any \"\\\\(foo@nowhere\\\\.gov\\\\|foo@localhost\\\\|foo-redist@home\\\\)\"
 	   - \"bugs-foo\" - \"rambling-foo\" \"mail.foo\"))
    \"mail.others\")"
-  (let* ((newsrc (cdr gnus-newsrc-alist))
+  (let* ((newsrc (append (cdr gnus-newsrc-alist) (my-gnus-group-split-prepare-parameters)))
 	 split)
     (dolist (info newsrc)
       (let ((group (gnus-info-group info))
#+end_src

Regards.
-- 
Daniel Dehennin
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Re: Extending 'gnus-parameters usage

[Lars Magne Ingebrigtsen]

Daniel Dehennin <daniel.dehennin@baby-gnu.org> writes:

> I think it's dirty, I post here to propose the idea and hope for a clean
> solution.
>
> I do not like the group parameter customization from the group buffer,
> I maintain my configuration in a git repository and would like to follow
> any changes to my groups configuration.
>
> So I define a 'my-gnus-group-split-prepare-parameters function to merge
> 'gnus-parameters and 'newsrc-alist.

Well, we could add a `gnus-parameter-function' variable to be plugged in
here that would take a group name and return the group parameters. 

    (dolist (info newsrc)
      (let ((group (gnus-info-group info))
	    (params (gnus-info-params info)))
	;; For all GROUPs that match the specified GROUPS

That should allow for great flexibility for the user to choose where the
parameters come from...

-- 
(domestic pets only, the antidote for overdose, milk.)
  bloggy blog http://lars.ingebrigtsen.no/