Emacs org-agenda Export agenda -how to?

I'am new with Emacs and certainly with lisp. I know that we can save an agenda (view?) with C-x C-w. Fine but can we do that with the (setq org-agenda-custom-commands) ? I would like to save the weekly agenda to a .txt file (like agenda.txt).

Solution

Accounding the documentation of org-agenda-custom-commands(partly paste here):

Custom commands for the agenda. Each entry is a list like this:

(key desc type match settings files)

or

(key desc (cmd1 cmd2 ...) general-settings-for-whole-set files)

files     A list of files to write the produced agenda buffer to with
          the command org-store-agenda-views.
          If a file name ends in ".html", an HTML version of the buffer
          is written out.  If it ends in ".ps", a postscript version is
          produced.  Otherwise, only the plain text is written to the file.

You can set org-agenda-custom-commands like:

(setq org-agenda-custom-commands
      '(("n" "Agenda and all TODOs"
         ((agenda "")
          (alltodo ""))
         nil
         ("~/agenda.txt"))))

and then M-x org-agenda n M-x org-store-agenda-views to save the agenda view to ~/agenda.txt.

or you can write a function to do this.

(defun save-agenda-view (&optional arg)
  (interactive "P")
  (org-agenda arg "n")
  (org-store-agenda-views))