Treat article with external script

[Breanndán Ó Nualláin]

I'd like to be able to do article washing by running the article through
an external python script. Is there an easy way to do this?

[Boris Dorestand]

Post by Breanndán Ó Nualláin
I'd like to be able to do article washing by running the article through
an external python script. Is there an easy way to do this?

I just looked at the menu when in the summary buffer and there is

Article -> Washing -> Unix pipe...

But I don't know which command that is. It is not currently mapped to a
keyboard shortcut on my GNU Emacs 24.3.1. There's the command

gnus-summary-pipe-output

But I'm not sure which is used when I used the menu. In fact, how would
I discover that? That's my question. Thanks!

[Helmut Waitzmann Anti-Spam-Ticket.b.qc3c]

Post by Breanndán Ó Nualláin
I'd like to be able to do article washing by running the article
through an external python script. Is there an easy way to do
this?

You could define a function: 


(defun my-gnus-article-wash nil
"Invoke the program '(car my-gnus-article-wash)' on the current buffer.
If the variable 'my-gnus-article-wash' is a non-nil list of a
program name and positional parameters, run it as a filter on
the current buffer's contents."
(interactive)
(if my-gnus-article-wash
(apply
(function call-process-region)
(point-min)
(point-max)
(car my-gnus-article-wash)
t
t
nil
(cdr my-gnus-article-wash))))


… and a variable: 


(defvar my-gnus-article-wash nil
"*invocation list to be executed on contents of the article buffer.
If non-nil, is a list containing an executable file name and argv1
... argvn invocation arguments to execute on the contents of
the article buffer and replacing it. One example would be
'(\"iconv\" \"-t\" \"ASCII//TRANSLIT\")
to transliterate every non-ASCII character to its corresponding
ASCII approximate character.")


You might put the function and variable definitions in a file, for
example "~/my_emacs_libs/gnus_wash_articles.el".  Byte compile
that file.  Have it loaded from the emacs startup file: 

(load "~/my_emacs_libs/gnus_wash_articles")


You might put the following assignments into the gnus startup
file: 


Assign a value to the variable: 


(setq-default
my-gnus-article-wash
'("the_external_python_script" "and" "its" "parameters"))


Put the function into the gnus-part-display-hook: 


(add-hook
'gnus-part-display-hook
(function my-gnus-article-wash))

That will invoke the python script with the given parameters on
the article content.