Re: [O] Kill all items with specific tag to kill-ring.

[Oleksandr Gavenko]

Carsten Dominik <carsten.dominik <at> gmail.com> writes:

> 
> 
> On 25.4.2013, at 10:21, Oleksandr Gavenko <gavenkoa <at> gmail.com> wrote:
> 
> > I finish with very hackie code (based on knowledge of internal
> > implementation of org-scan-tags):
> > 
> > (defun my-org-kill-by-tag (tag)
> >  (interactive (list (read-input "Enter tag: ")))
> >  (kill-new "")
> >  (org-scan-tags
> >   (lambda ()
> >     (let ( (last-command 'kill-region) )
> >       (org-cut-subtree)))
> >   '(member tag tags-list)
> >   nil) )
> > 
> > You can replace 'org-cut-subtree' by 'org-copy-subtree' if don't want remove
> > org entries...
> 
> Yes, this work, nice trick with binding last-command to kill-region.
> 

10 min of reading (info "(elisp)Low-Level Kill Ring")... This morning I ask:

  http://thread.gmane.org/gmane.emacs.help/90339
        Want to delete distinct regions but make capable undo by single command.

This hack based on:

   (defun kill-region (beg end &optional yank-handler)
     ....
          (if (eq last-command 'kill-region)
              (kill-append string (< end beg) yank-handler)
            (kill-new string nil yank-handler)))

> A less hackie version would probably add the found entries to a
> string or list and only put that string into the kill ring at the end.
> 
> org-map-entries would allow processing of several files in one go,
> but it would be a very similar implementation.
> 

I look to code and found that 'org-map-entries' call 'org-scan-tags'. As
'org-map-entries' looks complicated to me I try to use more low-level
function...

'org-map-entries' also allow rich search queries:

  (info "(org)Matching tags and properties")

`+work-boss'
     Select headlines tagged `:work:', but discard those also tagged
     `:boss:'.

`work|laptop'
     Selects lines tagged `:work:' or `:laptop:'.

`work|laptop+night'
     Like before, but require the `:laptop:' lines to be tagged also
     `:night:'.

Next 20 min I search for 'org-get-buffer-tags'. This code completely satisfy
my needs:

(defun my-org-kill-by-tag (tag)
  (interactive (list (completing-read "Enter tag: " (org-get-buffer-tags))))
  (kill-new "")
  (org-scan-tags
   (lambda ()
     (let ( (last-command 'kill-region) )
       (org-cut-subtree)))
   '(member tag tags-list)
   nil) )

Is it possible to include "correct" implementation (seems that I can't able
implement one) to org-mode?

I want this feature in order to simplify precess of moving entries from job
org-file to home org-file by marking entries with tag :HOME:...